10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark one)

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the Fiscal Year Ended December 31, 2020

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from _____ to _____

Commission File Number: 001-38456

COLUMBIA FINANCIAL, INC.

(Exact name of registrant as specified in its charter)

Delaware			22-3504946
(State or other jurisdiction of incorporation or organization)			(I.R.S. Employer Identification No)
19-01 Route 208 North,	Fair Lawn,	New Jersey	07410
(Address of principal executive offices)			(Zip Code)

(800) 522-4167

(Registrant’s telephone number, including area code)

Securities Registered Pursuant to Section 12(b) of the Act:
Title of each class	Trading symbol(s)	Name of exchange on which registered
Common stock, par value $0.01 per share	CLBK	The Nasdaq Stock Market LLC
Securities Registered Pursuant to Section 12(g) of the Act: None.

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. ☒ Yes ☐ No

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. ☐ Yes ☒ No

Indicate by check mark whether the registrant (l) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. ☒ Yes ☐ No

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files): ☒ Yes ☐ No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company or an emerging growth company. See the definitions of, “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller Reporting Company	☐
Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its managements's assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). ☐ Yes ☒ No

The aggregate market value of the voting and non-voting common equity held by non-affiliates as of June 30, 2020 was $582.8 million. The number of shares outstanding of the registrant’s common stock as of February 19, 2021 was 109,673,314.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Registrant’s Proxy Statement for the 2021 Annual Meeting of Stockholders are incorporated by reference into Part III of this Form 10-K.

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Index Annual Report on Form 10-K                

Item Number		Page Number
	PART I
Item 1.	Business	3
Item 1A.	Risk Factors	22
Item 1B.	Unresolved Staff Comments	29
Item 2.	Properties	30
Item 3.	Legal Proceedings	30
Item 4.	Mine Safety Disclosures	30
	PART II
Item 5.	Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	30
Item 6.	Selected Financial Data	33
Item 7.	Management's Discussion and Analysis of Financial Condition and Results of Operations	36
Item 7A.	Quantitative and Qualitative Disclosures About Market Risk	75
Item 8.	Financial Statements and Supplementary Data	75
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	75
Item 9A.	Controls and Procedures	75
Item 9B.	Other Information	76
	PART III
Item 10.	Directors, Executive Officers and Corporate Governance	76
Item 11.	Executive Compensation	77
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	77
Item 13.	Certain Relationships and Related Transactions, and Director Independence	77
Item 14.	Principal Accounting Fees and Services	77
	PART IV
Item 15.	Exhibits, Financial Statement Schedules	78
Item 16.	Form 10-K Summary	80
	Signatures	167

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K contains forward-looking statements, which can be identified by the use of words such as “believes,” “expects,” “anticipates,” “estimates” or similar expressions. Forward-looking statements include, but are not limited to:

•statements of our goals, intentions and expectations;

•statements regarding our business plans, prospects, growth and operating strategies;

•statements regarding the quality of our loan and securities portfolios; and

•estimates of our risks and future costs and benefits.

These forward-looking statements are subject to significant risks and uncertainties. Actual results may differ materially from those contemplated by the forward-looking statements due to, among other things, the following factors:

•general economic conditions, either nationally or in our market area, that are worse than expected;

•changes in the interest rate environment that reduce our net interest margin, reduce the fair value of financial instruments or reduce the demand for our loan products;

•increased competitive pressures among financial services companies;

•changes in consumer spending, borrowing and savings habits;

•changes in the quality and composition of our loan or securities portfolios;

•changes in real estate market values in our market area;

•decreased demand for loan products, deposit flows, competition, or demand for financial services in our market area;

•major catastrophes such as earthquakes, floods or other natural or human disasters and infectious disease outbreaks, including the current coronavirus (COVID-19) pandemic, the related disruption to local, regional and global economic activity and financial markets, and the impact that any of the foregoing may have on us and our customers and other constituencies;

•legislative or regulatory changes that adversely affect our business or changes in the monetary and fiscal policies of the U.S. government, including policies of the U.S. Treasury and the Federal Reserve Board;

•our ability to enter new markets successfully and capitalize on growth opportunities;

•our ability to grow our franchise through acquisitions and to successfully integrate any acquired entities;

•technological changes that may be more difficult or expensive than expected, and our inability to respond to emerging technological trends in a timely manner could have a negative impact on our revenue;

•success or consummation of new business initiatives may be more difficult or expensive than expected;

•adverse changes in the securities markets;

•cyber-attacks, computer viruses and other technological risks that may breach the security of our systems and allow unauthorized access to confidential information;

•the inability of third party service providers to perform; and

•changes in accounting policies and practices, as may be adopted by bank regulatory agencies or the Financial Accounting Standards Board, the Public Company Accounting Oversight Board and the Securities and Exchange Commission.

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Any of the forward-looking statements that we make in this report and in other public statements we make may later prove incorrect because of inaccurate assumptions, the factors illustrated above or other factors that we cannot foresee. Consequently, no forward-looking statements can be guaranteed. Except as required by applicable law or regulation, we do not undertake, and we specifically disclaim any obligation, to release publicly the result of any revisions that may be made to any forward-looking statements to reflect events or circumstances after the date of the statements or to reflect the occurrence of anticipated or unanticipated events.

Further information on other factors that could affect us are included in the section of this Annual Report on Form 10-K captioned “Item 1A: Risk Factors.”

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PART I

Item I.    Business

General

Columbia Financial, Inc. (“Columbia Financial” or the “Company”) is a Delaware corporation that was organized in March 1997 in connection with the mutual holding company reorganization of Columbia Bank (the “Bank”). Columbia Financial is the holding company of Columbia Bank, a federally chartered stock savings bank. Columbia Bank, MHC (the “MHC”) was also organized in March 1997 under the laws of the United States. In connection with the reorganization, Columbia Financial became the wholly owned subsidiary of Columbia Bank MHC.

The Bank is a federally chartered savings bank founded in 1927. We serve the financial needs of our depositors and the local community as a community-minded, customer service-focused institution. We offer traditional financial services to businesses and consumers in our market areas. We attract deposits from the general public and use those funds to originate a variety of loans, including multifamily and commercial real estate loans, commercial business loans, one-to four-family real estate loans, construction loans, home equity loans and advances, and other consumer loans. We offer title insurance through our wholly-owned subsidiary, First Jersey Title Services, Inc. Wealth management services are offered through a third party relationship.

On April 19, 2018, the Company completed its minority stock offering and, in connection with the consummation of the offering, issued (i) 62,580,155 shares of its common stock to the MHC, (ii) 3,476,675 shares to the Columbia Bank Foundation, the Bank’s charitable foundation, and (iii) 49,832,345 shares to depositors of the Bank, who subscribed for and were allocated shares in the minority stock offering, as well as the Columbia Bank Employee Stock Ownership Plan (“ESOP”).

Effective October 15, 2020, the Bank has elected and has received regulatory approval to operate as a "covered savings association" pursuant to Section 5A of the Home Owners’ Loan Act, as amended, and the regulations of the Office of the Comptroller of the Currency promulgated thereunder. A covered savings association generally has the same rights and privileges as a national bank, and is subject to the same duties, restrictions, penalties, liabilities, conditions, and limitations that would apply to a national bank. Management believes that the key benefits of the Bank's election to operate as a covered savings association include the elimination of the requirement to meet the qualified thrift lender test and that the Bank will no longer be subject to the limits on an aggregate amount of commercial loans that are applicable to savings associations.

Our executive offices are located at 19-01 Route 208 North, Fair Lawn, New Jersey 07410 and our telephone number is (800) 522-4167. Our website address is www.columbiabankonline.com. Information on our website should not be considered a part of this report.

Throughout this report, references to “we,” “us” or “our” refer to the Company or the Bank, or both, as the context indicates.

Recent Acquisition History

Atlantic Stewardship Bank. On November 1, 2019, the Company completed its acquisition of Stewardship Financial Corporation (“Stewardship Financial”) and Atlantic Stewardship Bank, the wholly owned subsidiary of Stewardship Financial. At the effective time of the merger, Stewardship Financial merged with and into the Company in a series of transactions, with the Company as the surviving entity, and immediately thereafter, Atlantic Stewardship Bank merged with and into the Bank, with the Bank as the surviving institution. In addition, at the effective time of the merger, each outstanding share of Stewardship Financial common stock was converted into the right to receive from the Company a cash payment equal to $15.75. The total consideration paid was $136.3 million.

    Roselle Bank. On April 1, 2020, the Company completed its acquisition of RSB Bancorp, MHC, RSB Bancorp, Inc. and Roselle Bank (collectively, the “Roselle Entities”). At the effective time of the merger, (i) RSB Bancorp, MHC merged with and into the MHC, with the MHC as the surviving entity, (ii) RSB Bancorp, Inc. merged with and into the Company, with the Company as the surviving entity; and (iii) Roselle Bank merged with and into the Bank, with the Bank as the surviving institution. In addition, at the effective time of the merger, depositors of Roselle Bank became depositors of the Bank and were afforded the same rights and privileges in the MHC as if their accounts had been established at the Bank on the date established at Roselle Bank. At the effective time of the merger, the Company also issued 4,759,048 additional shares of its common stock to the MHC, representing an amount equal to the fair value of the Roselle Entities, as determined by an independent appraiser.

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Change in Fiscal Year

On May 22, 2018, the Board of Directors of the Company adopted a resolution to change the Company’s fiscal year end from September 30 to December 31, effective immediately as of the date of the Board resolution. In addition, on May 22, 2018, the Boards of Directors of the MHC and the Bank also adopted resolutions to change the MHC’s and the Bank’s fiscal year ends from September 30 to December 31, effective immediately as of the date of the Board resolutions. On June 15, 2018, the Company filed a transition Quarterly Report on Form 10-Q with the U.S. Securities and Exchange Commission for the three months ended December 31, 2017 in connection with its newly adopted fiscal year end.

Market Area

We are headquartered in Fair Lawn, New Jersey. As of December 31, 2020 we operated 61 full-service banking offices in twelve of New Jersey’s 21 counties. In addition, First Jersey Title Services, Inc., a wholly-owned subsidiary of the Bank, operates in one of our offices in Fair Lawn, New Jersey. We periodically evaluate our network of banking offices to optimize the penetration in our market area. Our business strategy currently includes opening new branches in and around our market area, which may include neighboring states. Our acquisition of Roselle Bank enabled us to enhance our New Jersey market area by expanding into Somerset and Hunterdon counties.

We consider our market area to be the State of New Jersey and the suburbs surrounding both the New York City and Philadelphia metropolitan areas. This area has historically benefited from having a large number of corporate headquarters and a concentration of financial services-related industries located within it. The area also benefits from having a well-educated employment base and a large number of diverse industrial, service, retail and high technology businesses. Other employment is provided by a variety of wholesale trade, manufacturing, federal, state and local governments, hospitals and utilities.

According to a 2020 census projection, the population of our twelve county primary market area totaled approximately nine million. The population in our twelve county market area has increased by 1.0% from 2010 to 2020. According to S&P Global, the weighted average median household income for 2020 for the twelve New Jersey counties that we operate in was $97,516. By contrast, the national median household income for 2020 was $67,761 and the State of New Jersey median income was $89,080. The unemployment rate, not seasonally adjusted, for the State of New Jersey was 4.1% in December 2018, 3.5% in December 2019, and 7.6% in December 2020, which was higher than the national unemployment rate of 3.7% in December 2018 and 6.7% in December 2020, and lower than the national unemployment rate of 3.6% in December 2019. The employment rates significantly increased in 2020 due to the COVID-19 pandemic, but came down from their highest levels experienced earlier in the year.

Competition

We face significant competition in attracting deposits. Many of the nation’s largest financial institutions operate in our market area. Our most direct competition for deposits has historically come from the many banks, thrift institutions and credit unions operating in our market area and, to a lesser extent, from other financial service companies such as brokerage firms and insurance companies. We also face competition for investors’ funds from money market funds, mutual funds and other corporate and government securities.

Our competition for loans comes primarily from the competitors referenced above and from other financial service providers, such as mortgage companies and mortgage brokers. Competition for loans also comes from the increasing number of non-depository financial service companies participating in the mortgage market, such as insurance companies, securities companies, financial technology companies and specialty finance firms, along with federal agencies.

We expect competition to remain intense in the future as a result of legislative, regulatory and technological changes and the continuing trend of consolidation in the financial services industry. Technological advances, for example, have lowered barriers to entry, allowed banks to expand their geographic reach by providing services over the internet and made it possible for non-depository institutions, including financial technology companies, to offer products and services that traditionally have been provided by banks. Competition for deposits and the origination of loans could limit our growth in the future.

Lending Activities

We offer a variety of loans, including commercial, residential and consumer loans. Our commercial loan portfolio includes multifamily and commercial real estate loans, commercial business loans and construction loans. Our residential loan portfolio includes one-to-four family residential real estate loans and one-to-four family residential construction loans. Our consumer loan portfolio primarily includes home equity loans and advances, and to a lesser extent automobile, personal, unsecured and overdraft lines of credit.

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We intend to continue to emphasize commercial lending and manage existing credit relationships. In the past two years, we have completed our acquisition of Stewardship Financial and the Roselle Entities and have continued to invest in our lending staff, technology and processes to position the Bank for continued growth. Specifically, in the past year, we have hired additional lenders with significant experience in our market area to expand our commercial real estate and commercial and industrial lending efforts. In addition, we will continue to offer competitive pricing for our one-to-four family loan products and continue to invest in lending staff to market these products in New Jersey, New York and Pennsylvania.

Multifamily and Commercial Real Estate Loans. We originate mortgage loans for the acquisition and refinancing of multifamily properties and nonresidential real estate. At December 31, 2020, multifamily and commercial real estate loans totaled $2.8 billion, or 45.7% of our total loan portfolio. Of this amount, $2.3 billion of loans were used for the purchase, financing and/or refinancing of commercial real estate and the financing of income-producing real estate. These loans are generally non-owner-occupied properties in which 50% or more of the primary source of repayment is derived from rental income from unaffiliated third-parties. Our multifamily loans include loans primarily to finance apartment buildings located in the State of New Jersey, and to a lesser extent, in New York and Pennsylvania. Our commercial real estate loans include loans secured by office buildings, retail shopping centers, medical office buildings, industrial, warehouses, hotels, assisted-living facilities and similar commercial properties.

We offer both fixed and adjustable rate multifamily and commercial real estate loans. We originate these loans generally for terms of up to ten years and with payments generally based on an amortization schedule of up to 30 years for multifamily properties, and up to 25 years for commercial properties, and to a lesser extent, we offer loans with an interest only period of up to two years. Our adjustable rate loans are typically fixed from three to ten years.

When making multifamily and commercial real estate loans, we consider the financial statements and tax returns of the borrower, the borrower’s payment history of its debt, the debt service capabilities of the borrower, the projected cash flows of the real estate, leases for any of the tenants located at the collateral property and the value of the collateral and the strength of the guarantors, if any.

As of December 31, 2020, the average outstanding loan balance within our multifamily loan portfolio was $2.6 million, and the average loan balance within our commercial real estate loan portfolio totaled $1.4 million. At December 31, 2020, our largest multifamily loan was a $50.0 million loan secured by 22 garden style apartment buildings containing 312 total units located in Mercer County, New Jersey. The loan is well-collateralized and was performing in accordance with its original terms at December 31, 2020. As of December 31, 2020, our largest commercial real estate loan was a $22.5 million loan to refinance a retail property anchored by a supermarket located in Bergen County, New Jersey. The loan is well-collateralized and was performing in accordance with its original terms at December 31, 2020.

One-to-Four Family Residential Loans. We offer fixed-rate and adjustable-rate residential mortgage loans. Our fixed-rate mortgage loans have terms of up to 30 years. At December 31, 2020, one-to-four family residential loans totaled $1.9 billion, or 31.5% of our total loan portfolio. We also offer adjustable-rate mortgage loans with interest rates and payments that adjust annually after an initial fixed period of up to seven years. Interest rates and payments on our adjustable-rate loans generally are adjusted to a rate equal to a spread above the U.S. Treasury security index. Our adjustable-rate single-family residential real estate loans generally have a cap of 2% on any increase or decrease in the interest rate at any adjustment date, and a maximum adjustment limit of 5% on any such increase or decrease over the life of the loan. To increase the originations of adjustable-rate loans, we have been originating loans that bear a fixed interest rate for a period of up to seven years (but historically as long as ten years) after which they convert to one-year adjustable-rate loans. Our adjustable-rate loans require that any payment adjustment resulting from a change in the interest rate be sufficient to result in full amortization of the loan by the end of the loan term and, thus, do not permit any of the increased payment to be added to the principal amount of the loan, creating negative amortization. Although we offer adjustable-rate loans with initial rates below the fully indexed rate, loans tied to the one-year constant maturity treasury are underwritten using methods approved by the Federal Home Loan Mortgage Corporation (“Freddie Mac”) or the Federal National Mortgage Association (“Fannie Mae”). We do not offer loans with negative amortization and we do not currently offer interest-only residential mortgage loans.

Borrower demand for adjustable-rate loans compared to fixed-rate loans is a function of the level of interest rates, the expectations of changes in the level of interest rates, and the difference between the interest rates and loan fees offered for fixed-rate mortgage loans as compared to the interest rates and loan fees for adjustable-rate loans. At December 31, 2020, fixed-rate mortgage loans totaled approximately $1.7 billion and adjustable-rate mortgage loans totaled approximately $201.1 million. The loan fees, interest rates and other provisions of mortgage loans are determined by us on the basis of our own pricing criteria and competitive market conditions.

While one-to-four family residential real estate loans are normally originated with up to 30-year terms, such loans typically remain outstanding for substantially shorter periods because borrowers often prepay their loans in full either upon sale of the property pledged as security or upon refinancing the original loan. Therefore, average loan maturity is a function of, among other factors, the level of purchase and sale activity in the real estate market, prevailing interest rates and the interest rates payable on outstanding loans.

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It is our general policy not to make high loan-to-value loans (defined as loans with a loan-to-value ratio of 80% or more) without private mortgage insurance. The maximum loan-to-value ratio we generally permit is 95% with private mortgage insurance, although occasionally we do originate loans with loan-to-value ratios as high as 97.75% under special loan programs, including our first-time homeowner loan program. We require all properties securing mortgage loans to be appraised by an independent appraiser approved by our board of directors. We require title insurance on all purchase money and refinance mortgage loans. Borrowers must obtain hazard insurance, and flood insurance is required for loans on properties located in a flood zone.

As of December 31, 2020, the average outstanding loan balance within our one-to-four family residential real estate loan portfolio was $268,000. As of December 31, 2020, our largest one to-four family residential real estate loan was a $6.7 million loan secured by a residential property located in Bergen County, New Jersey. The loan is well-collateralized and was performing in accordance with its original terms at December 31, 2020.

Commercial Business Loans. We make commercial business loans in our market area to a variety of professionals, sole proprietorships, partnerships and corporations. We offer a variety of commercial lending products such as secured and unsecured loans that include term loans for equipment financing and for business acquisitions, working capital loans, inventory financing and revolving lines of credit. In most cases, fixed-rate loans have terms up to ten years and are fully amortizing. Revolving lines of credit generally will have adjustable rates of interest and will be extended for periods of up to 24 months to support inventory and accounts receivable fluctuations and are subject to periodic review and renewal. Business loans with variable rates of interest adjust on a daily basis and are generally indexed to the prime rate as published in The Wall Street Journal. Unsecured commercial business lending is generally considered to involve a higher degree of risk than secured lending. Risk of loss on an unsecured commercial business loan is dependent largely on the borrower’s ability to remain financially able to repay the loan out of ongoing operations. If our estimate of the borrower’s financial ability is inaccurate, we may be confronted with a loss of principal on the loan.

In making commercial business loans, we consider a number of factors, including the financial condition of the borrower, the nature of the borrower’s business, economic conditions affecting the borrower, our market area, the management experience of the borrower, the debt service capabilities of the borrower, the projected cash flows of the business and the collateral. Commercial loans are generally secured by a variety of collateral, including equipment, machinery, inventory and accounts receivable, and may be supported by personal guarantees.

We also originate commercial business and real estate loans under the Small Business Administration (“SBA”). Loans originated under this program are partially guaranteed by the SBA and are underwritten within the guidelines set forth by the SBA. As of December 31, 2020, the outstanding balance of our SBA loans was $367.3 million, which is included in the secured and unsecured commercial business loan amounts discussed above. On March 27, 2020 the Coronavirus Aid, Relief and Economic Security Act ("CARES Act") was signed into law, and included the creation of the SBA's Paycheck Protection Program ("PPP"). The CARES Act authorized the SBA to temporarily guarantee loans under a new loan program under which the SBA will guarantee 100% of the PPP loans made to eligible borrowers. As a qualified SBA lender, the Bank was authorized to originate these loans. As of December 31, 2020, PPP loans totaling $344.4 million are included in the balance of SBA loans.

As of December 31, 2020, the average outstanding loan balance within our commercial business loan portfolio (excluding lines of credit with no outstanding balance and PPP loans) was $395,000. As of December 31, 2020, the average outstanding PPP loan balance was $189,000. At December 31, 2020, our largest commercial business loan was a $12.4 million loan to an automobile dealership located in Passaic County, New Jersey, and was secured by real estate and business assets.

Construction Loans. We originate commercial construction loans primarily to professional builders for the construction and acquisition of personal residences, apartment buildings, retail, industrial, warehouse, office buildings and special purpose facilities. We will originate construction loans on unimproved land in amounts typically up to 65% of the lower of the appraised value or the cost of the land. We also originate loans for site improvements and construction costs in amounts generally up to 75% of as completed and stabilized appraised value. Our construction loans generally provide for the payment of interest only during the construction phase, which is usually six to 36 months. Many of our commercial construction loans are structured to convert to permanent financing upon completion and stabilization. Commercial real estate construction loans are typically based upon the prime rate as published in The Wall Street Journal. At December 31, 2020, we had an outstanding balance of $313.1 million in construction loans for commercial development.

Before making a commitment to fund a construction loan, we require an appraisal of the property by a licensed appraiser. We also review and inspect each property before disbursement of funds during the term of the construction loan. Loan proceeds are disbursed after inspections based on the work completed.

Construction lending generally involves a higher degree of risk than permanent mortgage lending because funds are advanced upon the security of the project under construction prior to its completion. As a result, construction lending often involves the disbursement of substantial funds with repayment dependent on the success of the ultimate project and the ability of the borrower or

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guarantor to repay the loan. Because of these factors, the analysis of prospective construction loan projects requires an expertise that is different in significant respects from that which is required for other types of lending. We have addressed these risks through our underwriting procedures. Additionally, we have attempted to minimize the foregoing risks by, among other things, limiting our construction lending to experienced developers, by limiting the amount of speculative construction projects and requiring executed agreements of sales as conditions for draws of the commercial construction loans. When making commercial construction loans, we consider the financial statements of the borrower, the borrower’s payment history, the projected cash flows from the proposed real estate collateral, and the value of the collateral. In general, our real estate construction loans are typically guaranteed by the principals of the borrowers. We consider the financial statements and tax returns of the guarantors, along with the guarantors’ payment history, when underwriting a commercial construction loan.

As of December 31, 2020, the average outstanding loan balance within our commercial construction loan portfolio was $2.6 million. At December 31, 2020, our largest commercial construction loan exposure had an outstanding balance of $28.9 million and was made to finance an apartment complex located in Monmouth County, New Jersey. The loan payments are current and have been made in accordance with the loan terms at December 31, 2020.

We also originate residential construction loans primarily on a construction-to-permanent basis with such loans converting to an amortizing loan following the completion of the construction phase. Most of our residential construction loans are made to individuals building a personal residence. At December 31, 2020, residential construction loans totaled $15.6 million, or 0.3%, of total loans outstanding. Construction lending, by its nature, entails additional risks compared to one-to-four family mortgage lending, attributable primarily to the fact that funds are advanced based upon a security interest in a project which is not yet complete. We address these risks through our established underwriting policies and procedures performed by our experienced staff.

Home Equity Loans and Advances. We offer consumer home equity loans and advances that are secured by one-to-four family residential real estate, where we may be in a first or second lien position. Historically, we offered home equity loans and advances with a lien junior to second position and some of these junior loans still reside in the loan portfolio at December 31, 2020. In addition, in prior years we also offered adjustable-rate home equity loans with fixed terms, although we no longer offer these loans. We generally offer home equity loans and advances with a maximum combined loan-to-value ratio of 80%. At December 31, 2020, home equity loans and advances totaled $321.2 million, or 5.2%, of our total loan portfolio. Home equity loans have fixed rates of interest and are currently offered with terms of up to 20 years. Home equity advances have adjustable rates and are based upon the prime rate as published in The Wall Street Journal. Home equity advances can have repayment schedules of both principal and interest or interest only paid monthly. We held a first mortgage position on approximately 52.1% of the homes that secured our home equity loans and advances at December 31, 2020.

The procedures for underwriting consumer home equity loans and advances include an assessment of the applicant’s payment history on other debts and ability to meet existing obligations and payments on the proposed loan. Although the applicant’s creditworthiness is a primary consideration, the underwriting process also includes a comparison of the value of the collateral to the proposed loan amount.

Other Consumer Loans. We offer a variety of other consumer loans, including loans for automobiles, personal loans, unsecured lines of credit, and overdraft lines of credit. Our unsecured lines of credit bear a substantially higher interest rate than our secured loans and lines of credit. At December 31, 2020, other consumer loans totaled $1.5 million.

For more information on our loan commitments, see “Item 7: Management’s Discussion and Analysis of Financial Condition and Results of Operations-Liquidity Management”

Credit Risks

Multifamily and Commercial Real Estate Loans. Loans secured by multifamily and commercial real estate loans generally have larger balances and involve a greater degree of risk than one-to four-family residential mortgage loans. Of primary concern in multifamily and commercial real estate lending is the borrower’s creditworthiness and the feasibility and cash flow potential of the property that secures the loan. Additional considerations include: location, market and geographic concentrations, loan-to-value ratio, strength of guarantors and quality of tenants. Payments on loans secured by income properties often depend on successful operation and management of the properties. As a result, repayment of such loans may be subject to a greater extent than residential real estate loans to adverse conditions in the real estate market or the economy. To monitor cash flows on income properties, we require borrowers and loan guarantors, if any, to provide annual financial statements and rent rolls where applicable. In reaching a decision on whether to make a commercial real estate loan, we usually consider and review a global cash flow analysis of the borrower, when applicable, and consider the net operating income of the property, the borrower’s expertise, credit history, and profitability and the value of the underlying property. The global analysis is more typically performed when lending to real estate development and management companies that own multiple properties with financing from other creditors. The analysis takes into consideration all rental income and expenses from the borrower’s real estate investments to determine if any other real estate holdings in the portfolio

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do not provide income levels to support the expenses of each property and debt service requirements for any third party financing secured by the properties held in the portfolio. We have generally required that the properties securing these real estate loans have debt service coverage ratios (the ratio of earnings before debt service to debt service) of at least 1.2x and a loan-to-value no greater than 75% for commercial properties and no greater than 80% for multifamily properties. An environmental report is obtained when the possibility exists that hazardous materials may have existed on the site, or the site may have been impacted by adjoining properties with known environmental concerns.

One-to-Four Family Real Estate Loans. While we anticipate that adjustable-rate loans will better offset the adverse effects of an increase in interest rates as compared to fixed-rate mortgages, the increased mortgage payments required of adjustable-rate loan borrowers in a rising interest rate environment could cause an increase in delinquencies and defaults. The marketability of the underlying property also may be adversely affected in a high interest rate environment. In addition, although adjustable-rate mortgage loans help make our asset base more responsive to changes in interest rates, the extent of this interest sensitivity is limited by the annual and lifetime interest rate adjustment limits on such loans.

Commercial Business Loans. Unlike residential mortgage loans, which generally are made on the basis of the borrower’s ability to make repayment from his or her employment or other income, and which are secured by real property, the value of which tends to be more easily ascertainable, commercial business loans are of higher risk and typically are made on the basis of the borrower’s ability to make repayment from the cash flow of the borrower’s business. As a result, the availability of funds for the repayment of commercial business loans may depend substantially on the success of the business itself and guarantors, if any. Further, any collateral securing such loans may depreciate over time, may be difficult to appraise, may fluctuate in value and may depend on the borrower’s ability to collect receivables.

Construction Loans. Loans made to facilitate construction are primarily short term loans used to finance the construction of an owner-occupied residence or income producing assets. Generally, upon stabilization or upon completion and issuance of a certificate of occupancy, these loans often convert to permanent loans with long-term amortization. Payments during construction consist of an interest-only period funded generally by borrower or guarantor equity. As these loans represent higher risk, each project is monitored for progress throughout the life of the loan, and loan funding occurs through borrower draw requests. These requests are compared to project milestones and progress is verified by independent inspectors engaged by us.

Construction financing is generally considered to involve a higher degree of risk of loss than long-term financing on improved, occupied real estate. Risk of loss on a construction loan is dependent largely upon the accuracy of the initial estimate of the property’s value at completion of construction or development and the estimated cost (including interest) of construction. During the construction phase, a number of factors could result in delays and cost overruns. If the estimate of construction costs proves to be inaccurate, business conditions may dictate that the borrower or guarantors, when applicable, contribute additional equity or we advance funds beyond the amount originally committed to permit completion of the project. If the estimate of value proves to be inaccurate, we may be confronted, at or before the maturity of the loan, with a project having a value which is insufficient to assure full repayment.

Home Equity Loans and Advances. Consumer home equity loans and advances are loans secured by one-to four-family residential real estate, where we may be in a first or junior lien position. In each instance, the value of the property is determined and the loan is made against identified equity in the market value of the property. When a residential mortgage is not present on the property, a first lien position is secured against the property. In cases where a mortgage is present on the property, a junior lien position is established, subordinated to the first mortgage. As these subordinated liens represent higher risk, loan collection becomes more influenced by various factors, including job loss, divorce, illness or personal bankruptcy. Furthermore, the application of various federal and state laws, including federal and state bankruptcy and insolvency laws, may limit the amount that can be recovered on such loans.

Other Consumer Loans. Unlike consumer home equity loans, these loans are either unsecured or secured by rapidly depreciating assets such as autos. In such cases, repossessed collateral for a defaulted consumer loan may not provide an adequate source of repayment for the outstanding loan and a small remaining deficiency often does not warrant further substantial collection efforts against the borrower. Consumer loan collections depend on the borrower’s continuing financial stability, and, therefore, are likely to be adversely affected by various factors, including job loss, divorce, illness or personal bankruptcy. Furthermore, the application of various federal and state laws, including federal and state bankruptcy and insolvency laws, may limit the amount that can be recovered on such loans.

Loan Originations and Purchases. Loan originations come from a number of sources. The primary sources of loan originations are existing customers, online channels, walk-in traffic, advertising and referrals from customers and other business contacts, including attorneys, accountants and other professionals. Residential mortgage loans are also sourced through mortgage brokers, although such loans are underwritten by the Bank in accordance with its underwriting standards.

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Occasionally, we purchase participation interests in loans to supplement our lending portfolio. Loan participations totaled $55.4 million at December 31, 2020 and were comprised of 26 commercial real estate loans. Loan participations are subject to the same credit analysis and loan approvals as loans which we originate. We review all of the documentation relating to any loan in which we participate. However, for participation loans, we do not service the loan and, thus, are subject to the policies and practices of the lead lender with regard to monitoring delinquencies, pursuing collections and instituting foreclosure proceedings.

Loan Approval Procedures and Authority. Our lending activities follow written, non-discriminatory, underwriting standards and loan origination procedures established by management and policies approved by our board of directors. The board of directors has granted loan approval authority to certain officers or groups of officers up to prescribed limits, based on the officer’s experience and tenure. All unsecured commercial loan exposures greater than $5 million and all secured commercial loan exposures greater than $10 million must be approved by a Credit Committee, which is comprised of personnel from the Executive, Credit, Finance and Lending departments.

Loans to One Borrower. The maximum amount that we may lend to one borrower and the borrower’s related entities is limited, by regulation, to generally 15% of our unimpaired capital and reserves. At December 31, 2020, our regulatory limit on loans to one borrower was $138.7 million. At December 31, 2020, the total exposure with our largest lending relationship was $115.5 million and was comprised of ten loans to related borrowers. The loans associated with this relationship were performing in accordance with their original terms at December 31, 2020.

Loan Commitments. We issue commitments for fixed and adjustable-rate mortgage loans conditioned upon the occurrence of certain events. Commitments to originate mortgage loans are legally binding agreements to lend to our customers. Generally, our loan commitments expire after 60 days.

Delinquent Loans. We identify loans that may need to be charged-off as a loss by reviewing all delinquent loans, classified loans and other loans that management may have concerns about collectability. For individually reviewed loans, the borrower’s inability to make payments under the terms of the loan as well as a shortfall in collateral value may result in a write down to management’s estimate of net realizable value. The collateral or cash flow shortfall on all secured loans is charged-off when the loan becomes 90 days delinquent or earlier where management determines that the collection of loan principal is unlikely. In the case of unsecured loans, the entire balance deemed uncollectable is charged-off when the loan becomes 90 days delinquent. For more information on how we address credit risk, see “Item 7: Management’s Discussion and Analysis of Financial Condition and Results of Operations-Risk Management.”

Securities Activities

We maintain a securities portfolio that consists of U.S. Government and agency obligations, mortgage-backed securities and collateralized mortgage obligations (“CMOs”), municipal obligations, corporate debt securities, equity securities, and trust preferred securities. We classify our securities as either held to maturity or available for sale. Management determines the appropriate classification of securities at the time of purchase. If we have the intent and the ability to hold the securities until maturity, they are classified as held to maturity. These securities are stated at amortized cost and adjusted for accretion of discounts over the estimated lives of the securities using the level-yield method. Premiums are amortized to the first (or earliest) call date instead of as an adjustment to the yield over the contractual life. Securities in the available for sale category are those for which we do not have the intent at purchase to hold to maturity. These securities are reported at fair value with any unrealized appreciation or depreciation, net of tax effects, reported as a separate component of accumulated other comprehensive income.

Mortgage-backed securities are a type of asset-backed security that is secured by a mortgage, or a collection of mortgages. These securities usually pay periodic payments that are similar to coupon payments. The contractual cash flows of securities in government sponsored enterprises’ mortgage-backed securities are debt obligations of Freddie Mac and Fannie Mae, both of which are currently under the conservatorship of the Federal Housing Finance Agency. The contractual cash flows related to Government National Mortgage Association (“Ginnie Mae”) securities are direct obligations of the U.S. Government. Mortgage-backed securities are also known as mortgage pass-throughs. CMOs are structured as pool mortgage-backed securities and redistribute principal and interest payments to predetermined groups (classes) of investors. The repayments from the pool of pass-through securities are used to retire the bonds in the order specified by the bonds’ prospectuses.

At December 31, 2020, 91.1% of the available for sale portfolio was comprised of mortgage-backed securities and CMOs issued by Freddie Mac, Fannie Mae and Ginnie Mae. These securities are guaranteed by the issuing agency and backed by residential and multifamily mortgages. These securities are comprised of fixed rate, adjustable-rate and hybrid securities that bear a fixed rate for a specific term and, thereafter, to the extent they are not prepaid, adjust periodically. At December 31, 2020, corporate debt securities comprised the next largest segment of the available for sale portfolio, totaling 5.3% of the portfolio. At December 31, 2020, the remainder of our available for sale securities portfolio consisted of U.S. government and agency obligations, municipal obligations and trust preferred securities, which comprised 1.9%, 1.3%, and 0.4%, respectively, of the portfolio.

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At December 31, 2020, 98.1% of the held to maturity securities portfolio was comprised of mortgage-backed securities and CMOs issued by Freddie Mac, Fannie Mae and Ginnie Mae. These securities are guaranteed by the issuing agency and backed by residential and multifamily mortgages. These securities are comprised of fixed rate, adjustable-rate and hybrid securities that bear a fixed rate for a specific term and thereafter, to the extent they are not prepaid, adjust periodically. At December 31, 2020, the remainder of our held to maturity securities portfolio consisted of U.S. government and agency obligations which comprised 1.9% of the portfolio.

At December 31, 2020, we held $5.4 million of securities in our equity portfolio comprised of a trust preferred security that is not traded in an active market,and Federal Home Loan Mortgage Corporation ("FHLMC") and Federal National Mortgage Association ("FNMA") preferred stock. In addition, the equity portfolio includes Atlantic Community Bankers Bank ("ACBB") stock, which is based on redemption at par value and can only be sold to the issuing ACBB or another institution that holds ACBB stock. Some of these securities receive dividends and all are carried at fair value.

To mitigate the credit risk related to our securities portfolio, we primarily invest in agency and highly-rated securities. As of December 31, 2020, approximately 93.9% of the total portfolio consisted of direct government obligations or government sponsored enterprise obligations, approximately 5.7% of the remaining portfolio was rated at least investment grade and approximately 0.4% of the remaining portfolio was not rated. Securities not rated consist primarily of short term municipal bond anticipation notes, private placement municipal notes issued and guaranteed by local municipal authorities, and equity securities.

Deposit Activities and Other Sources of Funds.

General. Deposits, borrowings and loan and securities repayments are the major sources of our funds for lending and other investment purposes. Scheduled loan and securities repayments are a relatively stable source of funds, while deposit inflows and outflows and loan prepayments are significantly influenced by general interest rates and market conditions.

Deposit Accounts. Deposits are primarily attracted from within our market area through the offering of a broad selection of deposit products, including non-interest bearing demand deposits (such as checking accounts to individuals and commercial checking accounts), interest-bearing demand accounts (such as interest-earning checking account products and most municipal accounts), savings and club accounts, money market accounts and certificates of deposit. We have not historically utilized brokered deposits, but assumed $31.6 million of brokered deposits in our acquisition of Stewardship Financial in November 2019. The balance of these brokered deposits at December 31, 2020 is $26.3 million.

Our three primary categories of deposit customers consist of retail or individual customers, businesses and municipalities. Our business banking deposit products include a commercial checking account, a checking account specifically designed for small businesses and a money market product. Additionally, we offer cash management services, including remote deposit, lockbox service and sweep accounts.

Deposit account terms vary according to the minimum balance required, the time periods the funds must remain on deposit and the interest rate, among other factors. In determining the terms of our deposit accounts, we consider the rates offered by our competition, the rates on borrowings, our liquidity needs, profitability to us, and customer preferences and concerns. We generally review our deposit mix and pricing weekly. Our deposit pricing strategy has traditionally been to offer competitive rates on all types of deposit products, and to periodically offer special rates in order to attract deposits. Current strategies include changing the deposit mix to include more core deposits.

Borrowings. We have the ability to utilize advances and overnight lines of credit from the FHLB to supplement our liquidity. As a member, we are required to own capital stock in the FHLB and are authorized to apply for advances on the security of such stock and certain mortgage loans and other assets, provided certain standards related to creditworthiness have been met. Advances are made under several different programs, each having its own interest rate and range of maturities. We can also utilize securities sold under agreements to repurchase to provide funding. We maintain access to the Federal Reserve Bank’s discount window and federal funds lines with correspondent banks to supplement our supply of investable funds and to meet deposit withdrawal and contingency funding requirements. To secure our borrowings, we generally pledge securities and/or loans. The types of securities pledged for borrowings include, but are not limited to, government-sponsored enterprises (“GSE”) including notes and government agency mortgage-backed securities and CMOs. The types of loans pledged for borrowings include, but are not limited to, one-to four-family real estate mortgage loans, home equity loans and multifamily and commercial real estate loans. At December 31, 2020, we had additional borrowing capacity from the FHLB and the Federal Reserve Bank of New York based on our ability to collateralize such borrowings. Members in good standing with the FHLB can borrow up to 50% of their asset size as long as they have qualifying collateral to support the advance and purchase of FHLB capital.

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Regulation and Supervision

General

As a federal savings bank, the Bank is subject to examination, supervision and regulation, primarily by the Office of the Comptroller of the Currency, and, secondarily, by the Federal Deposit Insurance Corporation (“FDIC”) as deposit insurer. Effective October 15, 2020, the Bank has elected and has received regulatory approval to operate as a “covered savings association” pursuant to Section 5A of the Home Owners’ Loan Act, as amended, and the regulations of the Office of the Comptroller of the Currency promulgated thereunder. A covered savings association generally has the same rights and privileges as a national bank, and is subject to the same duties, restrictions, penalties, liabilities, conditions, and limitations that would apply to a national bank.

The Bank is also regulated by the Federal Reserve Board, which governs the reserves to be maintained against deposits and other matters. In addition, the Bank is a member of and owns stock in the FHLB of New York, which is one of the 11 regional banks in the Federal Home Loan Bank System. The Bank’s relationship with its depositors and borrowers also is regulated to a great extent by federal law and, to a lesser extent, state law, including in matters concerning the ownership of deposit accounts and other contractual arrangements.

As savings and loan holding companies in the mutual holding company structure, the Company and the MHC are subject to examination and supervision by, and are required to file certain reports with, the Federal Reserve Board. The Company is also subject to the rules and regulations of the Securities and Exchange Commission under the federal securities laws.

Set forth below are certain material regulatory requirements that are applicable to the Bank and the Company. This description of statutes and regulations is not intended to be a complete description of such statutes and regulations and their effects on the Bank and the Company. Any change in these laws or regulations, whether by Congress or the applicable regulatory agencies, could have a material adverse impact on the Company, the Bank and their operations.

Federal Banking Regulations

Business Activities. A federal savings bank derives its lending and investment powers form the Home Owners' Loan Act, as amended, and applicable federal regulations. However, as a covered savings association, the Bank generally has the same rights and privileges as a national bank, and is subject to the same duties, restrictions, penalties, liabilities, conditions, and limitations that would apply to a national bank.

Examinations and Assessments. The Bank is primarily supervised by the Office of the Comptroller of the Currency. The Bank is required to file reports with and is subject to periodic examination by the Office of the Comptroller of the Currency. The Bank is required to pay assessments to the Office of the Comptroller of the Currency to fund the agency’s operations.

Capital Requirements. Federal regulations require FDIC-insured depository institutions, including federal savings banks, to meet several minimum capital standards: a common equity Tier 1 capital to risk-based assets ratio, a Tier 1 capital to risk-based assets ratio, a total capital to risk-based assets and a Tier 1 capital to total assets leverage ratio.

The capital standards require the maintenance of common equity Tier 1 capital, Tier 1 capital and Total capital to risk-weighted assets of at least 4.5%, 6.0% and 8.0%, respectively. The regulations also establish a minimum required leverage ratio of at least 4% Tier 1 capital. Common equity Tier 1 capital is generally defined as common stockholders’ equity and retained earnings. Tier 1 capital is generally defined as common equity Tier 1 capital plus additional Tier 1 capital. Additional Tier 1 capital generally includes certain noncumulative perpetual preferred stock and related surplus and minority interests in equity accounts of consolidated subsidiaries. Total capital includes Tier 1 capital (common equity Tier 1 capital plus additional Tier 1 capital) and Tier 2 capital. Tier 2 capital is comprised of capital instruments and related surplus meeting specified requirements, and may include cumulative preferred stock and long-term perpetual preferred stock, mandatory convertible securities, intermediate preferred stock and subordinated debt. Also included in Tier 2 capital is the allowance for loan losses limited to a maximum of 1.25% of risk-weighted assets and, for institutions that have exercised an opt-out election regarding the treatment of accumulated other comprehensive income such as the Bank, up to 45% of net unrealized gains on available for sale equity securities with readily determinable fair market values. Institutions that have not exercised the accumulated other comprehensive income opt-out have accumulated other comprehensive income incorporated into common equity Tier 1 capital (including unrealized gains and losses on available for sale securities). Calculation of all types of regulatory capital is subject to deductions and adjustments specified in the regulations.

In determining the amount of risk-weighted assets for purposes of calculating risk-based capital ratios, an institution’s assets, including certain off-balance sheet assets (e.g., recourse obligations, direct credit substitutes, residual interests), are multiplied by a risk weight factor assigned by the regulations based on the risk deemed inherent in the type of asset. Higher levels of capital are required for asset categories believed to present greater risk. For example, a risk weight of 0% is assigned to cash and U.S.

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government securities, a risk weight of 50% is generally assigned to prudently underwritten first lien one- to four-family residential mortgages, a risk weight of 100% is assigned to commercial and consumer loans, a risk weight of 150% is assigned to certain past due loans and a risk weight of between 0% to 600% is assigned to permissible equity interests, depending on certain specified factors.

In addition to establishing the minimum regulatory capital requirements, the regulations limit capital distributions and certain discretionary bonus payments to management if the institution does not hold a "capital conservation buffer" consisting of 2.5% of common equity Tier 1 capital to risk-weighted assets above the amount necessary to meet its minimum risk-based capital requirements. The capital conservation buffer requirement was phased in beginning January 1, 2016 at 0.625% of risk-weighted assets and increased each year until it was fully implemented at 2.5% on January 1, 2019.

    As a result of the recently enacted Economic Growth, Regulatory Relief, and Consumer Protection Act, the federal banking agencies developed a "Community Bank Leverage Ratio" (the ratio of a bank's Tier 1 equity capital to average total consolidated assets) for financial institutions with less than $10 billion. A "qualifying community bank" that exceeds this ratio will be deemed to be in compliance with all other capital and leverage requirements, including the capital requirements to be considered "well capitalized" under Prompt Corrective Action statutes. The federal banking agencies may consider a financial institution's risk profile when evaluating whether it qualifies as a community bank for purposes of the capital ratio requirement. The federal banking agencies set the minimum capital for the new Community Bank Leverage Ratio at 9%. A financial institution can elect to be subject to this new definition. The Bank elected not to utilize this framework.

At December 31, 2020, the Bank’s capital exceeded all applicable requirements.

Loans-to-One Borrower. Generally, a federal savings bank or national bank may not make a loan or extend credit to a single or related group of borrowers in excess of 15% of unimpaired capital and surplus. An additional amount may be lent, equal to 10% of unimpaired capital and surplus, if secured by “readily marketable collateral,” which generally includes certain financial instruments (but not real estate). As of December 31, 2020, the Bank was in compliance with the loans-to-one borrower limitations.

Standards for Safety and Soundness. Federal law requires each federal banking agency to prescribe certain standards for all insured depository institutions. These standards relate to, among other things, internal controls, information systems and audit systems, loan documentation, credit underwriting, interest rate risk exposure, asset growth, compensation and other operational and managerial standards as the agency deems appropriate. Interagency guidelines set forth the safety and soundness standards that the federal banking agencies use to identify and address problems at insured depository institutions before capital becomes impaired. If the appropriate federal banking agency determines that an institution fails to meet any standard prescribed by the guidelines, the agency may require the institution to submit to the agency an acceptable plan to achieve compliance with the standard. Failure to implement such a plan can result in further enforcement action, including the issuance of a cease and desist order or the imposition of civil money penalties.

Prompt Corrective Action. Under the federal prompt corrective action statute, the Office of the Comptroller of the Currency is required to take supervisory actions against undercapitalized institutions under its jurisdiction, the severity of which depends upon the institution’s level of capital. An institution that has a total risk-based capital ratio of less than 8.0%, a Tier 1 risk-based capital ratio of less than 6.0%, a common equity Tier 1 ratio of less than 4.5% or a leverage ratio of less than 4% is considered to be “undercapitalized”. An institution that has total risk-based capital of less than 6.0%, a Tier 1 risk-based capital ratio of less than 4.0%, a common equity Tier 1 ratio of less than 3.0% or a leverage ratio that is less than 3.0% is considered to be “significantly undercapitalized”. An institution that has a tangible capital to assets ratio equal to or less than 2.0% is deemed to be “critically undercapitalized”.

Generally, the Office of the Comptroller of the Currency is required to appoint a receiver or conservator for a federal savings bank or national bank that becomes “critically undercapitalized” within specific time frames. The regulations also provide that a capital restoration plan must be filed with the Office of the Comptroller of the Currency within 45 days of the date that a federal savings association is deemed to have received notice that it is “undercapitalized,” “significantly undercapitalized” or “critically undercapitalized”. Any holding company of a federal savings association that is required to submit a capital restoration plan must guarantee performance under the plan in an amount of up to the lesser of 5.0% of the savings association’s assets at the time it was deemed to be undercapitalized by the Office of the Comptroller of the Currency or the amount necessary to restore the savings association to adequately capitalized status. This guarantee remains in place until the Office of the Comptroller of the Currency notifies the institution that it has maintained adequately capitalized status for each of four consecutive calendar quarters. Institutions that are undercapitalized become subject to certain mandatory measures such as restrictions on capital distributions and asset growth. The Office of the Comptroller of the Currency may also take any one of a number of discretionary supervisory actions against undercapitalized federal savings associations, including the issuance of a capital directive and the replacement of senior executive officers and directors.

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At December 31, 2020, the Bank met the criteria for being considered “well capitalized,” which means that its total risk-based capital ratio exceeded 10%, its Tier 1 risk-based ratio exceeded 8.0%, its common equity Tier 1 ratio exceeded 6.5% and its leverage ratio exceeded 5.0%.

Capital Distributions. Federal regulations govern capital distributions by a federal savings bank, including a covered savings association, which include cash dividends, stock repurchases and other transactions charged to the institution’s capital account. A federal savings bank, including a covered savings association, must file an application with the Office of the Comptroller of the Currency for approval of a capital distribution if (i) the total capital distributions for the applicable calendar year exceed the sum of the institution’s net income for that year to date plus the institution’s retained net income for the preceding two years; (ii) the institution would not be at least adequately capitalized following the distribution; (iii) the distribution would violate an applicable statute, regulation, agreement or regulatory condition; or (iv) the institution is not eligible for expedited treatment of its filings. Even if an application is not otherwise required, every savings association that is a subsidiary of a savings and loan holding company, such as the Bank, must file a notice with the Federal Reserve Board at least 30 days before the board of directors declares a dividend. An application or notice related to a capital distribution may be disapproved if (i) the federal savings association would be undercapitalized following the distribution; (ii) the proposed capital distribution raises safety and soundness concerns or (iii) the capital distribution would violate a prohibition contained in any statute, regulation or agreement.

In addition, the Federal Deposit Insurance Act provides that an insured depository institution shall not make any capital distribution if, after making such distribution, the institution would fail to meet any applicable regulatory capital requirement.

Community Reinvestment Act and Fair Lending Laws. All financial institution banks have a responsibility under the Community Reinvestment Act and related regulations to help meet the credit needs of their communities, including low and moderate-income borrowers. In connection with its examination of a federal savings bank, the Office of the Comptroller of the Currency is required to assess the federal savings bank’s record of compliance with the Community Reinvestment Act. A savings bank’s failure to comply with the provisions of the Community Reinvestment Act could, at a minimum, result in denial of certain corporate applications such as branches or mergers, or in restrictions on its activities. In addition, the Equal Credit Opportunity Act and the Fair Housing Act prohibit lenders from discriminating in their lending practices on the basis of characteristics specified in those statutes. The failure to comply with the Equal Credit Opportunity Act and the Fair Housing Act could result in enforcement actions by the Office of the Comptroller of the Currency, as well as other federal regulatory agencies and the Department of Justice.

The Community Reinvestment Act requires all institutions insured by the FDIC to publicly disclose their rating. The Bank received a “satisfactory” Community Reinvestment Act rating in its most recent federal examination.

Transactions with Related Parties. A federal savings bank’s authority to engage in transactions with its affiliates is limited by Sections 23A and 23B of the Federal Reserve Act and federal regulation. An affiliate is generally any company that controls, or is under common control with an insured depository institution such as the Bank. The Company and the MHC are affiliates of the Bank because of their direct and indirect control of the Bank. In general, transactions between an insured depository institution and its affiliates are subject to certain quantitative limits and collateral requirements. In addition, federal regulations prohibit a savings association from lending to any of its affiliates that are engaged in activities that are not permissible for bank holding companies and from purchasing the securities of any affiliate, other than a subsidiary. Finally, transactions with affiliates must be consistent with safe and sound banking practices, not involve the purchase of low-quality assets and be on terms that are as favorable to the institution as comparable transactions with non-affiliates.

The Bank’s authority to extend credit to its directors, executive officers and 10% stockholders, as well as to entities controlled by such persons, is currently governed by the requirements of Sections 22(g) and 22(h) of the Federal Reserve Act and Regulation O of the Federal Reserve Board. Among other things, these provisions generally require that extensions of credit to insiders:

•be made on terms that are substantially the same as, and follow credit underwriting procedures that are not less stringent than, those prevailing for comparable transactions with unaffiliated persons and that do not involve more than the normal risk of repayment or present other unfavorable features; and

•not exceed certain limitations on the amount of credit extended to such persons, individually and in the aggregate, which limits are based, in part, on the amount of the Bank’s capital.

In addition, extensions of credit in excess of certain limits must be approved by the Bank’s board of directors. Extensions of credit to executive officers are subject to additional limits based on the type of extension involved.

Enforcement. The Office of the Comptroller of the Currency has primary enforcement responsibility over federal savings banks and has authority to bring enforcement action against all “institution-affiliated parties,” including directors, officers,

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stockholders, attorneys, appraisers and accountants who knowingly or recklessly participate in wrongful action likely to have an adverse effect on a federal savings association. Formal enforcement action by the Office of the Comptroller of the Currency may range from the issuance of a capital directive or cease and desist order to removal of officers and/or directors of the institution to the appointment of a receiver or conservator. Civil penalties cover a wide range of violations and actions, and range up to $25,000 per day, unless a finding of reckless disregard is made, in which case penalties may be as high as $1.0 million per day. The FDIC also has the authority to terminate deposit insurance or recommend to the Office of the Comptroller of the Currency that enforcement action be taken with respect to a particular savings association. If such action is not taken, the FDIC has authority to take the action under specified circumstances.

Insurance of Deposit Accounts. The Deposit Insurance Fund of the FDIC insures deposits at FDIC-insured financial institutions such as the Bank. Deposit accounts in the Bank are insured by the FDIC generally up to a maximum of $250,000 per separately insured depositor and up to a maximum of $250,000 for self-directed retirement accounts.

The FDIC charges insured depository institutions premiums to maintain the Deposit Insurance Fund. Assessments for most institutions are now based on financial measures and supervisory ratings derived from statistical modeling estimating the probability of failure within three years. In conjunction with the Deposit Insurance Fund reserve ratio achieving 1.15%, the assessment range (inclusive of possible adjustments) was reduced for most banks and savings associations from 1.5 basis points to 30 basis points.

The FDIC has authority to increase insurance assessments. Any significant increases would have an adverse effect on the operating expenses and results of operations of the Bank. The Bank cannot predict what assessment rates will be in the future.

Insurance of deposits may be terminated by the FDIC upon a finding that an institution has engaged in unsafe or unsound practices, is in an unsafe or unsound condition to continue operations or has violated any applicable law, regulation, rule, order or condition imposed by the FDIC. We do not currently know of any practice, condition or violation that may lead to termination of our deposit insurance.

Federal Home Loan Bank System. The Bank is a member of the Federal Home Loan Bank System, which consists of 11 regional Federal Home Loan Banks. The Federal Home Loan Bank System provides a central credit facility primarily for member institutions as well as other entities involved in home mortgage lending. As a member of the FHLB of New York, the Bank is required to purchase and hold shares of capital stock in the FHLB of New York. As of December 31, 2020, the Bank was in compliance with this requirement. The FHLB imposes various limitations on advances such as limiting the amount of certain types of real estate related collateral and limiting total advances to a member.

Other Regulations. Interest and other charges collected or contracted for by the Bank are subject to state usury laws and federal laws concerning interest rates. The Bank’s operations are also subject to federal laws applicable to credit transactions, such as the:

•Truth-In-Lending Act, governing disclosures of credit terms to consumer borrowers;

•Home Mortgage Disclosure Act, requiring financial institutions to provide information to enable the public and public officials to determine whether a financial institution is fulfilling its obligation to help meet the housing needs of the community it serves;

•Equal Credit Opportunity Act, prohibiting discrimination on the basis of race, creed or other prohibited factors in extending credit;

•Fair Credit Reporting Act, governing the use and provision of information to credit reporting agencies;

•Fair Debt Collection Act, governing the manner in which consumer debts may be collected by collection agencies;

•Truth in Savings Act, prescribing disclosure and advertising requirements with respect to deposit accounts; and

•Rules and regulations of the various federal agencies charged with the responsibility of implementing such federal laws.

    The operations of the Bank also are subject to the:

•Right to Financial Privacy Act, which imposes a duty to maintain confidentiality of consumer financial records and prescribes procedures for complying with administrative subpoenas of financial records;

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•Electronic Funds Transfer Act and Regulation E promulgated thereunder, which govern automatic deposits to and withdrawals from deposit accounts and customers’ rights and liabilities arising from the use of automated teller machines and other electronic banking services;

•Check Clearing for the 21st Century Act (also known as “Check 21”), which gives “substitute checks,” such as digital check images and copies made from that image, the same legal standing as the original paper check;

•The USA PATRIOT Act, which requires savings associations to, among other things, establish broadened anti-money laundering compliance programs, and due diligence policies and controls to ensure the detection and reporting of money laundering. Such required compliance programs are intended to supplement existing compliance requirements that also apply to financial institutions under the Bank Secrecy Act and the Office of Foreign Assets Control regulations; and

•The Gramm-Leach-Bliley Act, which places limitations on the sharing of consumer financial information by financial institutions with unaffiliated third parties. Specifically, the Gramm-Leach-Bliley Act requires all financial institutions offering financial products or services to retail customers to provide such customers with the financial institution’s privacy policy and provide such customers the opportunity to “opt out” of the sharing of certain personal financial information with unaffiliated third parties.

Holding Company Regulation

General. The Company and the MHC are non-diversified savings and loan holding companies within the meaning of the Home Owners’ Loan Act. As such, the Company and the MHC are registered with the Federal Reserve Board and are subject to the regulation, examination, supervision and reporting requirements applicable to savings and loan holding companies and mutual holding companies. In addition, the Federal Reserve Board has enforcement authority over the Company, the MHC and their non-savings institution subsidiaries. Among other things, this authority permits the Federal Reserve Board to restrict or prohibit activities that are determined to be a serious risk to the subsidiary savings bank.

Permissible Activities. Under present law, the business activities of the Company and the MHC are generally limited to those activities permissible for financial holding companies under Section 4(k) of the Bank Holding Company Act of 1956, as amended, provided certain conditions are met and financial holding company status is elected. A financial holding company may engage in activities that are financial in nature, including underwriting equity securities and insurance as well as activities that are incidental to financial activities or complementary to a financial activity. A multiple savings and loan holding company is generally limited to activities permissible for bank holding companies under Section 4(c)(8) of the Bank Holding Company Act, subject to regulatory approval, and certain additional activities authorized by federal regulations. The Company and the MHC have not elected financial holding company status.

Federal law prohibits a savings and loan holding company, including the Company and the MHC, directly or indirectly, or through one or more subsidiaries, from acquiring control of more than 5% of another savings institution or savings and loan holding company, without prior Federal Reserve Board approval. In evaluating applications by holding companies to acquire savings institutions, the Federal Reserve Board considers factors such as the financial and managerial resources, future prospects of the company and institution involved, the effect of the acquisition on the risk to the federal deposit insurance fund, the convenience and needs of the community and competitive factors.

The Federal Reserve Board is prohibited from approving any acquisition that would result in a multiple savings and loan holding company controlling savings institutions in more than one state, subject to two exceptions:

•the approval of interstate supervisory acquisitions by savings and loan holding companies; and

•the acquisition of a savings institution in another state if the laws of the state of the target savings institution specifically permit such acquisition.

Capital. Savings and loan holding companies have historically not been subjected to consolidated regulatory capital requirements. The Dodd-Frank Act required the Federal Reserve Board to establish for all bank and savings and loan holding companies minimum consolidated capital requirements that are as stringent as those required for the insured depository subsidiaries. The Company is subject to consolidated regulatory capital requirements that are similar to those that apply to the Bank.

Source of Strength. The Dodd-Frank Act extended the “source of strength” doctrine to savings and loan holding companies. The Federal Reserve Board has issued regulations requiring that all savings and loan holding companies serve as a source of strength to their subsidiary depository institutions.

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Dividends and Stock Repurchases. The Federal Reserve Board has issued a policy statement regarding the payment of dividends by holding companies. In general, the policy provides that dividends should be paid only out of current earnings and only if the prospective rate of earnings retention by the holding company appears consistent with the organization’s capital needs, asset quality and overall supervisory financial condition. Separate regulatory guidance provides for prior consultation with Federal Reserve Bank staff concerning dividends in certain circumstances such as where the company’s net income for the past four quarters, net of dividends previously paid over that period, is insufficient to fully fund the dividend or the company’s overall rate or earnings retention is inconsistent with the company’s capital needs and overall financial condition. The ability of a savings and loan holding company to pay dividends may be restricted if a subsidiary savings association becomes undercapitalized. The regulatory guidance also states that a savings and loan holding company should inform Federal Reserve Bank supervisory staff prior to redeeming or repurchasing common stock or perpetual preferred stock if the savings and loan holding company is experiencing financial weaknesses or the repurchase or redemption would result in a net reduction, at the end of a quarter, in the amount of such equity instruments outstanding compared with the beginning of the quarter in which the redemption or repurchase occurred. The Federal Reserve requires the Company to file an application for approval prior to implementing any repurchase plan. These regulatory policies may affect the ability of the Company to pay dividends, repurchase shares of common stock or otherwise engage in capital distributions.

Waivers of Dividends by Columbia Bank MHC. The Company may pay dividends on its common stock to public stockholders. If it does, it is also required to pay dividends to the MHC, unless the MHC elects to waive the receipt of dividends. Under the Dodd-Frank Act, the MHC must receive the approval of the Federal Reserve Board before it may waive the receipt of any dividends from the Company. The Federal Reserve Board has issued an interim final rule providing that it will not object to dividend waivers under certain circumstances, including circumstances where the waiver is not detrimental to the safe and sound operation of the savings association and a majority of the mutual holding company’s members have approved the waiver of dividends by the mutual holding company within the previous twelve months. In addition, for a “non-grandfathered” mutual holding company such as the MHC, each officer or director of the Company and the Bank, and any tax-qualified stock benefit plan or non-tax-qualified stock benefit plan in which such individual participates that holds any shares of stock to which the waiver would apply, must waive the right to receive any such dividend declared. The Federal Reserve Board’s current position is to not permit a non-grandfathered savings and loan or bank holding company to waive dividends declared by its subsidiary. In addition, any dividends waived by the MHC must be considered in determining an appropriate exchange ratio in the event of a second step conversion of the mutual holding company to stock form.

Conversion of Columbia Bank MHC to Stock Form.  Federal Reserve Board regulations permit the MHC to convert from the mutual form of organization to the capital stock form of organization (a “Conversion Transaction”). There can be no assurance when, if ever, a Conversion Transaction will occur, and the board of directors has no current intention or plan to undertake a Conversion Transaction. In a Conversion Transaction, a new stock holding company would be formed as the successor to the Company (the “New Holding Company”), the MHC’s corporate existence would end, and certain depositors and borrowers of the Bank would receive the right to subscribe for shares of the New Holding Company. In a Conversion Transaction, each share of common stock held by stockholders other than the MHC (“Minority Stockholders”) would be automatically converted into a number of shares of common stock of the New Holding Company determined pursuant to an exchange ratio that ensures that Minority Stockholders own the same percentage of common stock in the New Holding Company as they owned in the Company immediately prior to the Conversion Transaction. Any Conversion Transaction would be subject to approvals by Minority Stockholders and members of the MHC. Minority Stockholders will not be able to force a Conversion Transaction without the consent of the MHC since such transaction also requires, under federal corporate law, the approval of a majority of all of the outstanding voting stock, which can only be achieved if the MHC voted to approve such transaction.

Acquisition.  Under the Federal Change in Bank Control Act, a notice must be submitted to the Federal Reserve Board if any person (including a company), or group acting in concert, seeks to acquire direct or indirect “control” of a savings and loan holding company. Under certain circumstances, a change of control may occur, and prior notice is required, upon the acquisition of 10% or more of the company’s outstanding voting stock, unless the Federal Reserve Board has found that the acquisition will not result in control of the company. A change in control definitively occurs upon the acquisition of 25% or more of the company’s outstanding voting stock. Under the Change in Bank Control Act, the Federal Reserve Board generally has 60 days from the filing of a complete notice to act, taking into consideration certain factors, including the financial and managerial resources of the acquirer and the competitive effects of the acquisition.

Federal Securities Laws

The Company’s common stock is registered with the Securities and Exchange Commission under the Securities Exchange Act of 1934. The Company is therefore subject to the information, proxy solicitation, insider trading restrictions and other requirements under the Securities Exchange Act of 1934.

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Personnel

As of December 31, 2020, we had 557 full-time employees and 71 part-time employees, none of whom is represented by a collective bargaining unit. We believe that our relationship with our employees is good.

Human Capital Management

Columbia Bank and its Board of Directors considers our employees its most valuable asset and we promote an environment that is both rewarding and challenging. We offer many different programs and initiatives to develop our workforce and to ensure the work culture matches our mission of offering a challenging and rewarding work environment for employees while promoting programs that support wellness and the quality of employees’ lives. We encourage our employees to get involved with their communities and through Team Columbia our employees participate in many outreach programs and volunteer events. In addition, the Bank hosts various employee events such as the Annual Service Awards Dinner, Community Service Dinner and holiday events to further promote our culture and to provide opportunities for employee engagement. Though these events were postponed during the pandemic, other virtual events and town halls were held to connect with our employees and to keep communication strong.

At December 31, 2020, we employed 628 full and part time employees throughout the state of New Jersey. During the year ended December 31, 2020, we hired 116 employees, 48 of those coming from the Roselle Bank acquisition. The Bank implemented a hiring freeze during the months of March through August, 2020 due to the pandemic. Our voluntary turnover rate was 7.92% and the involuntary turnover was 10.91% in 2020. The voluntary and involuntary turnover rates were slightly higher than the year ended December 31, 2019. The increase in turnover rate was impacted by employees’ response to the pandemic and their willingness to be a customer facing employee during the pandemic. The Bank also implemented a voluntary early retirement program in July 2020 and 55 employees elected to leave under that program. The Bank also went through a branch consolidation of eight branches due to the acquisitions that occurred in 2019 and 2020.

Retention

In order to retain our talented workforce, we provide a competitive compensation and benefits program to help meet the needs of our employees. We monitor salaries on a regular basis participating in various external salary surveys and analyzing internal reports to ensure market competitiveness and internal equity. The Bank also offers annual incentive programs to further reward our employees based on their performance.

In addition to competitive salaries, we offer comprehensive benefit programs which include equity awards, an Employee Stock Ownership Plan ("ESOP") and a deferred compensation plan (401k) with an employer matching contribution, healthcare and life insurance benefits, health savings accounts, flexible spending accounts, paid time off, family leaves of absence, tuition reimbursement and an employee assistance program.

The human resources department will continue to enhance the wellness programs at the Bank to establish an environment that promotes a holistic approach to well-being that includes: healthy lifestyles, financial stability, mental well being, and decreases the risk of disease, and improves the quality of employee life. The programs will enhance the employee experience at the Bank by giving them the tools necessary to create a healthier lifestyle through the promotion of healthy diets, workplace activities, exercise programs and wellness seminars. Active participants in wellness programs enjoyed health insurance cost advantages. We have also created wellness and quiet rooms in the corporate headquarters for people to be able to take breaks or attend to personal matters. All of these programs are intended to make Columbia Bank an employer of choice.

Learning and Development

We invest in the growth and development of our employees by providing a multi-dimensional approach to learning that empowers, intellectually grows, and professionally develops our colleagues. Our employees receive continuing education courses that are relevant to the banking industry and their job function within the Company. We have developed succession programs that help us to create a pipeline for leadership. Our core curriculum is offered to all employees and helps to build upon the competencies and skills of which we are assessed during the performance management process.

We offer robust training programs on the topics of customer service, sales, change management, digital banking and products and services. As we have evolved into a public organization we have undergone a digital transformation. This initiative resulted in an extensive digital systems training curriculum.

To support our communication and training initiatives during the COVID-19 pandemic, we implemented a learning management system, a new virtual classroom and an eLearning authoring tool that allowed all job functional and soft skills training to continue to be offered at a distance for all colleagues. We also provided training on the collaboration tools that were rolled out by our information technology department. All training initiatives continued to be offered in spite of the pandemic.

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Talent Management

Columbia’s human resources and training departments have action plans designed specifically to facilitate the screening, acquisition, development and performance management of a talent pool that aligns with the initiatives of the Bank including promoting quality customer service and enhancing the client experience throughout the Bank. The Bank has funded significant technological investments, including the upgrade of its core banking platform, loan origination systems, document imaging systems, and business intelligence reporting. While these new systems provide enhanced features for customers and automation of routine tasks for staff, they require specialized technical skills to operate and administer. Based on the Bank’s strategic objectives, acquiring and developing a talent pool of well-educated and technically-skilled professionals is essential to support the Bank’s growth plans over the next decade.

We look to develop a diverse employee base to better reflect our customer base and local community. We are working towards impactful recruitment via social media, sharing employee experiences and insights, corporate brand ambassadors, community ambassadors and social and civic organizations. In addition, we enhanced our employee referral program to further assist in our hiring efforts.

Diversity, Equity and Inclusion

Our Diversity, Equity and Inclusion ("DEI") strategy focuses on increasing representation, education, teamwork and collaboration. We will also build a DEI task force made up of employees across the Bank to support additional events that support the diverse employees and clients we support. We practice equity recruiting practices to find top diverse talent and onboard them into the Bank. In addition, we include DEI perspectives in our social media, marketing and branding strategy. We believe that as our footprint grows our brand will expand to reflect the diverse range of clients and communities we support. The Bank is implementing an Environmental Social Governance ("ESG") program and recently named a Diversity Officer to assist in this initiative.

At the Bank, we believe that diversity is a core tenet of our future success. A diverse Board of Directors and workforce increase our creativity and innovation, promote higher quality decisions, enhance economic growth, and represent the shareholders and customers we serve.

Our organization and our Board of Directors are deeply committed to cultivating an inclusive culture where all backgrounds, experiences and perspectives are welcome; where individuals are comfortable being who they are and are encouraged to celebrate their diversity; and where all have opportunities to realize their full personal and professional potential.

Our mission is to ensure that we are diverse across all levels of the organization and that our policies, practices, and actions promote inclusion and continue to strengthen our ability to attract, develop and retain the best talent, while accelerating business growth, increasing shareholder value and supporting our local communities.

Our Board of Directors, executive management, and leadership teams are committed to working together to implement a comprehensive strategy to support, promote, and accelerate diversity and inclusion across the organization with a focus on achieving sustained results, value and impact.

Succession Planning

Succession planning is a critical driver of our transformation. Succession planning efforts are helping our organization become what it needs to be, rather than simply recreating the existing organization. We have programs in place to support these initiatives: Associate Development Program, Career Development Program, Leadership Development Program, Stonier/Wharton School Program, and new ones are being rolled out. We have active support of top leadership and have linked succession to strategic planning. We will be implementing an online interactive performance management system and process that includes a nine box grid (production and performance exercises) to identify talent from multiple organizational levels, early in careers, or with critical skills and leadership potential. There is emphasis on developmental assignments in addition to formal training. Along the way, we are addressing specific human capital challenges, such as diversity, leadership capacity, and retention.

Workplace Safety

We have policies and programs in place that protect our employees and invest in their well-being.

As the threat of the COVID-19 pandemic became clear, we took significant steps to protect the health and safety of our employees.We also provided our employees various outlets to gain emotional assistance during this time through our Employee Assistance Program and webinars provided by our healthcare provider. We were able to provide a safe workplace throughout the pandemic both in the branches and back office departments and implemented technologies for a remote work environment and to accommodate remote workers. We established service level agreements for the work from home environment communicating expectations to employees and receiving employee agreement to the execution of these expectations. These agreements will be

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monitored on a regular basis. The pandemic required the Bank to modify its facilities to provide additional precautions to ensure the safety of our staff and customers. It is expected that these regiments will continue in 2021. The Bank is nearing completion of the renovation of the corporate headquarters facility that will allow for the envisioned growth of existing department staff and operations consistent with the Bank’s strategic growth objectives.

Subsidiaries

Columbia Financial’s sole banking subsidiary is the Bank. Columbia Financial also maintains two trust subsidiaries, Columbia Financial Capital Trust I (a Delaware statutory trust) and Stewardship Statutory Trust I (a Delaware statutory trust), that were formed in connection with the prior issuance of trust preferred securities. The Stewardship statutory Trust which was acquired by the Bank as a result of its acquisition of Stewardship in November 2019.

Columbia Bank’s active subsidiaries are as follows:

First Jersey Title Services, Inc., a title insurance agency that we acquired in 2002. At December 31, 2020, total assets were approximately $19.4 million. For the year ended December 31, 2020, First Jersey Title Services, Inc. had net income of approximately $478,000.

1901 Commercial Management Co. LLC, which was established in 2009 to hold commercial other real estate owned, and 1901 Residential Management Co. LLC, which was established in 2009 to hold residential other real estate owned. At December 31, 2020, these subsidiaries both held $100,000 in total assets.

2500 Broadway Corp. is a passive investment company that holds an investment in CSB Realty Corp. At December 31, 2020, total assets were approximately $3.7 billion.

CSB Realty Corp., which is a majority owned subsidiary of 2500 Broadway Corp. CSB Realty Corp. is a real estate investment trust which holds commercial real estate, mortgage and home equity loans for investment. At December 31, 2020, total assets were approximately $3.1 billion.

Stewardship Realty LLC, which was formed in 2005 and acquired by the Bank as a result of its acquisition of Stewardship Financial in November 2019, is a New Jersey limited liability company that owns and manages property located at 612 Godwin Avenue Midland Park, New Jersey. At December 31, 2020, total assets were approximately $2.2 million.

Columbia Bank also currently maintains three inactive subsidiaries: (i) Columbia Investment Services, Inc., (ii) Real Estate Management Corp, LLC and (iii) Plaza Financial Services, Inc.

Information About Our Executive Officers

    Our executive officers are elected annually by the board of directors and serve at the board’s discretion. The following individuals currently serve as executive officers:

Name	Position
Thomas J. Kemly	President and Chief Executive Officer
E. Thomas Allen, Jr.	Senior Executive Vice President and Chief Operating Officer
Dennis E. Gibney, CFA	Executive Vice President and Chief Financial Officer
Damodaram Bashyam	Executive Vice President and Chief Information and Digital Officer
Geri M. Kelly	Executive Vice President and Human Resources Officer
John Klimowich	Executive Vice President and Chief Risk Officer
Mark S. Krukar	Executive Vice President and Chief Credit Officer
Oliver E. Lewis, Jr.	Executive Vice President and Head of Commercial Banking
Brian W. Murphy	Executive Vice President and Operations Officer
Allyson Schlesinger	Executive Vice President and Head of Consumer Banking

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    Below is information regarding our executive officers who are not also directors. Each executive officer has held his or her current position for the period indicated below. Ages presented are as of December 31, 2020.

    E. Thomas Allen, Jr. was appointed Senior Executive Vice President, Chief Operating Officer of Columbia Bank on December 24, 2014. Mr. Allen began his career with Columbia Bank on October 17, 1994 and held various positions in the finance department. He was promoted to Treasurer in 1996, appointed Vice President, Treasurer in 1998, and named Senior Vice President, Treasurer in 2001. In 2002, Mr. Allen was promoted to Executive Vice President, Chief Financial Officer and served in that capacity until his appointment to Senior Executive Vice President, Chief Operating Officer. Mr. Allen holds a BS/BA in Banking & Finance from the University of Missouri and an MBA in Financial Management from Pace University. Age 63.

Dennis E. Gibney, CFA was appointed Executive Vice President and Chief Financial Officer of Columbia Bank in 2014. Prior to joining Columbia Bank, Mr. Gibney worked for FinPro, Inc. a bank consulting firm, and its wholly owned investment banking subsidiary, FinPro Capital Advisors, Inc., for 17 years. While at FinPro, Mr. Gibney worked on mergers and acquisitions, mutual-to-stock conversions, corporate valuations, strategic planning and interest rate risk management engagements for community banks. Mr. Gibney graduated Magna Cum Laude from Babson College with a triple major in Finance, Investments and Economics. He is a CFA Charterholder and a member of the New York Society of Security Analysts. Age 47.

Damodaram Bashyam was appointed Executive Vice President and Chief Information and Digital Officer of Columbia Bank in December 2019. Prior to joining Columbia Bank, Mr. Bashyam served as Managing Director and Chief Technology Officer of JP Morgan Chase from January 2018 to December 2019, where he was responsible for all aspects of technology delivery for consumer banking. Mr. Bashyam previously served as Vice President, Information Technology for Verizon Wireless from 2013 to 2017, and in various other capacities with Verizon Wireless from 1998 to 2012. Mr. Bashyam holds an Executive MBA in General Management from the Kellogg School of Management, a Master’s degree in Information Systems from the Stevens Institute of Management and a Bachelor’s degree in Computer Science and Engineering from Bangalore University in Karnataka, India. Age 48.

Geri M. Kelly was appointed Executive Vice President, Human Resources Officer of Columbia Bank on January 1, 2012. Ms. Kelly began her career at Columbia Bank in December 1979 and held various positions in the human resources department. In 1998, Ms. Kelly was promoted to Vice President, Human Resources Officer and in December 2000 she was promoted to Senior Vice President, Human Resources Officer. Ms. Kelly served Columbia Bank in that capacity until her appointment to Executive Vice President, Human Resources Officer in 2012. She graduated from Douglass College with a Bachelor’s of Arts degree in Foreign Languages and received her Masters of Business Administration from Rutgers University. Age 63.

John Klimowich was appointed Executive Vice President and Chief Risk Officer of Columbia Bank on October 5, 2013. Mr. Klimowich began working for Columbia Bank in November 1985 and held various positions in the accounting department. Mr. Klimowich was promoted to Senior Vice President, Controller in March 2002 and served Columbia Bank in that capacity until his appointment as Executive Vice President and Chief Risk Officer in 2013. Mr. Klimowich holds a Bachelor’s degree in Economics from William Paterson University and an MBA in Accounting from Seton Hall University. Age 57.

Mark S. Krukar was appointed Executive Vice President and Chief Credit Officer of Columbia Bank in September 2018. He previously served as Executive Vice President and Chief Lending Officer of Columbia Bank in April 2012. Mr. Krukar began his career at Columbia Bank in December 1987 as a Commercial Lender and was promoted to Vice President/Commercial Lending in April 1995. Mr. Krukar was named Senior Vice President/Commercial Lending in 2002 and served in that capacity until he was promoted to Executive Vice President and Chief Lending Officer in 2012. Mr. Krukar graduated Magna Cum Laude with a Bachelor’s degree in Finance and received an MBA in Finance, both from Fairleigh Dickinson University. Age 60.

Oliver E. Lewis, Jr. was appointed Executive Vice President and Head of Commercial Banking of Columbia Bank in January 2021. Mr. Lewis began working for Columbia Bank in May 2019 and served as Senior Vice President, Commercial Banking Market Manager until his appointment as Executive Vice President and Head of Commercial Banking. In this role, Mr. Lewis is responsible for the commercial banking division consisting of the Bank's commercial & industrial, SBA, middle market, commercial real estate and construction lending activities, treasury management sales and the business development department. Prior to joining Columbia Bank, Mr. Lewis served as a Market Executive at JP Morgan Chase and Treasury Services, Regional Sales Executive. Mr. Lewis holds a Bachelor’s degree in Aviation Administration from Embry-Riddle Aeronautical University and received an MBA from Rutgers University. Age 56.

Brian W. Murphy was appointed Executive Vice President, Operations of Columbia Bank in March 2009. Mr. Murphy began his career at Columbia Bank as a Management Trainee in 1981 and held various positions in the retail department. In 1996, Mr. Murphy became Columbia Bank’s Branch Administrator and was promoted to Senior Vice President in 2001. He served Columbia Bank in that capacity until his appointment to Executive Vice President, Operations in 2009. Mr. Murphy holds a Bachelor’s degree in Accounting from William Paterson University. Age 61.

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Allyson Schlesinger was appointed Executive Vice President and Head of Consumer Banking of Columbia Bank in September 2018. In this role, Ms. Schlesinger is responsible for the retail banking, retail lending, wealth management and marketing divisions of the Bank. Ms. Schlesinger was previously with Citigroup, Inc. for 25 years, most recently as its Managing Director, U.S. Retail and Division Manager for Citigroup, Inc. in the New York City and New Jersey markets. Ms. Schlesinger holds a Bachelor’s degree from the University of Michigan. Age 49.

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Item 1A.    Risk Factors

    Investing in the Company’s common stock involves risks. The investor should carefully consider the following risk factors before deciding to make an investment decision regarding the Company’s stock. The risk factors may cause future earnings to be lower or the financial condition to be less favorable than expected. In addition, other risks that the Company is not aware of, or which are not believed to be material, may cause earnings to be lower, or may deteriorate the financial condition of the Company. Consideration should also be given to the other information in this Annual Report on Form 10-K, as well as in the documents incorporated by reference into this Form 10-K.

Risks Related to the COVID-19 Pandemic and Associated Economic Slowdown

The widespread outbreak of the novel coronavirus ("COVID-19") has adversely affected, and will likely continue to adversely affect, our business, financial condition, and results of operations. Moreover, the longer the pandemic persists, the more material the ultimate effects are likely to be.

The COVID-19 pandemic has negatively affected our business and is likely to continue to do so. However, the extent to which COVID-19 will negatively affect our business is unknown and will depend on the geographic spread of the virus, the overall severity of the disease, the duration of the pandemic, the actions undertaken by national, state and local governments and health officials to contain the virus or treat its effects, and how quickly and to what extent economic conditions improve and normal business and operating conditions resume. The longer the pandemic persists, the more material the ultimate effects are likely to be.

We have implemented business continuity plans and continue to provide financial services to clients, while taking health and safety measures such as limiting access to the interior of our facilities, installing protective barriers, frequent cleaning of our facilities, providing our staff with personal protective equipment and using a remote workforce where possible. Despite these safeguards, we may nonetheless experience business disruptions.

The continued spread of COVID-19 and the efforts to contain the virus could:

•cause changes in consumer and business spending, borrowing and savings habits, which may affect the demand for loans and other products and services we offer, as well as the creditworthiness of potential and current borrowers;

•cause our borrowers to be unable to meet existing payment obligations, particularly those borrowers that may be disproportionately affected by business shut downs and travel restrictions, such as those operating in the travel, lodging, retail, and entertainment industries, resulting in increases in loan delinquencies, problem assets, and foreclosures;

•cause the value of collateral for loans, especially real estate, to decline in value;

•reduce the availability and productivity of our employees;

•require us to increase our allowance for loan losses;

•cause our vendors and counterparties to be unable to meet existing obligations to us;

•negatively impact the business and collateral and collections of third party service providers that perform critical services for our business;

•impede our ability to close mortgage loans, if appraisers and title companies are unable to perform their functions;

•cause the value of our securities portfolio to decline;

•cause the net worth and liquidity of loan guarantors to decline, impairing their ability to honor commitments to us; and

•negatively impact our real estate operations due to a state mandated moratorium on evictions and foreclosures of residential properties.

Any one or a combination of the above events could have a material, adverse effect on our business, financial condition, and results of operations.

Moreover, our success and profitability is substantially dependent upon the management skills of our executive officers, many of whom have held officer positions with us for many years. The unanticipated loss or unavailability of key employees due to COVID-19 could harm our ability to operate our business or execute our business strategy. We may not be successful in finding and integrating suitable successors in the event of key employee loss or unavailability.

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Certain actions taken by U.S. or other governmental authorities, including the Federal Reserve, that are intended to ameliorate the macroeconomic effects of COVID-19 may cause additional harm to our business. Decreases in short-term interest rates, such as those announced by the Federal Reserve during the first fiscal quarter of 2020, have a negative impact on our results, as we have certain assets and liabilities that are sensitive to changes in interest rates.

Risks Related to Our Lending Activities

Our multifamily and commercial real estate lending practices expose us to increased lending risks and related loan losses.

At December 31, 2020, our multifamily and commercial real estate loan portfolios totaled $2.8 billion, or 45.7% of our total loan portfolio. Our current business strategy is to continue our originations of multifamily and commercial real estate loans. These loans generally expose a lender to greater risk of non-payment and loss than one-to-four family residential mortgage loans because repayment of the loans often depends on the successful operation of the properties and the income stream of the borrowers. These loans involve larger loan balances to single borrowers or groups of related borrowers compared to one-to four-family residential mortgage loans. Further, we may increase our loans to individual borrowers, which would result in larger loan balances. To the extent that borrowers have more than one multifamily or commercial real estate loan outstanding, an adverse development with respect to one loan or one credit relationship could expose us to a significantly greater risk of loss compared to an adverse development with respect to a one-to- four family residential real estate loan. Moreover, if loans that are collateralized by multifamily or commercial real estate properties, become troubled and the value of the real estate has been significantly impaired, then we may not be able to recover the full contractual amount of principal and interest that we anticipated at the time we originated the loan, which could cause us to increase our provision for loan losses and adversely affect our earnings and financial condition.

Imposition of limits by the bank regulators on commercial and multifamily real estate lending activities could curtail our growth and adversely affect our earnings.

In 2006, the Office of the Comptroller of the Currency, the Federal Deposit Insurance Corporation and the Board of Governors of the Federal Reserve System (collectively, the “Agencies”) issued joint guidance entitled “Concentrations in Commercial Real Estate Lending, Sound Risk Management Practices” (the “CRE Guidance”). Although the CRE Guidance did not establish specific lending limits, it provides that a bank’s commercial real estate lending exposure could receive increased supervisory scrutiny where total non-owner-occupied commercial real estate loans, including loans secured by apartment buildings, investor commercial real estate, and construction and land loans, represent 300% or more of an institution’s total risk-based capital, and the outstanding balance of the commercial real estate loan portfolio has increased by 50% or more during the preceding 36 months. The balance of these real estate loans represented 283.8% of Columbia Bank’s total risk-based capital at December 31, 2020, and our commercial real estate loan portfolio increased by approximately 50% during the preceding 36 months.

In December 2015, the Agencies released a new statement on prudent risk management for commercial real estate lending (the “2015 Statement”). In the 2015 Statement, the Agencies, among other things, indicate the intent to continue “to pay special attention” to commercial real estate lending activities and concentrations going forward. If the Office of the Comptroller of the Currency, our primary federal regulator, were to impose restrictions on the amount of commercial real estate loans we can hold in our portfolio, for reasons noted above or otherwise, our earnings would be adversely affected.

Our origination of construction loans exposes us to increased lending risks.

We originate commercial construction loans, including speculative construction loans, primarily to professional builders for the construction and acquisition of personal residences, apartment buildings, retail, industrial/warehouse, office buildings and special purpose facilities. Speculative construction loans are loans made to builders who have not identified a buyer for the completed property at the time of loan origination. At December 31, 2020, $328.7 million, or 5.3%, of our loan portfolio, consisted of construction loans, of which $61.3 million, or 19.6% consisted of speculative construction loans. In addition, we originate residential construction loans primarily on a construction-to-permanent basis with such loans converting to an amortizing loan following the completion of the construction phase. Our construction loans present a greater level of risk than loans secured by improved, occupied real estate due to: (1) the increased difficulty at the time the loan is made of estimating the building costs and the selling price of the property to be built; (2) the increased difficulty and costs of monitoring the loan; (3) the higher degree of sensitivity to increases in market rates of interest; and (4) the increased difficulty of working out loan problems. In addition, with respect to speculative construction loans, repayment often depends on the successful construction or development and ultimate sale of the property and, possibly, unrelated cash needs of the borrowers. Further, construction costs may exceed original estimates as a result of increased materials, labor or other costs. Construction loans also often involve the disbursement of funds with repayment dependent, in part, on the success of the project and the ability of the borrower to sell or lease the property or refinance the indebtedness.

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Our concentration of residential mortgage loans exposes us to increased lending risks.

At December 31, 2020, $1.9 billion, or 31.5%, of our loan portfolio was secured by one-to-four family real estate, a significant majority of which is located in the State of New Jersey, and to a lesser extent New York and Pennsylvania, and we intend to continue this type of lending in the foreseeable future. One-to-four family residential mortgage lending is generally sensitive to regional and local economic conditions that significantly impact the ability of borrowers to meet their loan payment obligations, making loss levels difficult to predict. A decline in residential real estate values as a result of a downturn in the local housing market or in the markets in neighboring states in which we originate residential mortgage loans could reduce the value of the real estate collateral securing these types of loans. Declines in real estate values could cause some of our residential mortgages to be inadequately collateralized, which would expose us to a greater risk of loss if we seek to recover on defaulted loans by selling the real estate collateral.

Our commercial business lending activities expose us to additional lending risks.

We make commercial business loans in our market area to a variety of professionals, sole proprietorships, partnerships and corporations. Unlike residential mortgage loans, which generally are made on the basis of the borrower’s ability to make repayment from his or her employment or other income, and which are secured by real property, the value of which tends to be more easily ascertainable, commercial business loans are of higher risk and typically are made on the basis of the borrower’s ability to make repayment from the cash flow of the borrower’s business. As a result, the availability of funds for the repayment of commercial business loans may depend substantially on the success of the business itself. Further, any collateral securing such loans may depreciate over time, may be difficult to appraise, may fluctuate in value and may depend on the borrower’s ability to collect receivables. We have increased our focus on commercial business lending in recent years and intend to continue to focus on this type of lending in the future.

If our allowance for loan losses is not sufficient to cover actual loan losses, our results of operations would be negatively affected.

In determining the amount of the allowance for loan losses, we analyze our loss and delinquency experience by loan categories and we consider the effect of existing economic conditions. In addition, we make various assumptions and judgments about the collectability of our loan portfolio, including the creditworthiness of our borrowers and the value of the real estate and other assets serving as collateral for the repayment of many of our loans. If the actual results are different from our estimates, or our analyses are incorrect, our allowance for loan losses may not be sufficient to cover losses inherent in our loan portfolio, which would require additions to our allowance and would decrease our net income. Our emphasis on loan growth and on increasing our portfolio, as well as any future credit deterioration, will require us to increase our allowance further in the future.

In addition, our banking regulators periodically review our allowance for loan losses and could require us to increase our provision for loan losses. Any increase in our allowance for loan losses or loan charge-offs as required by regulatory authorities may have a material adverse effect on our results of operations and financial condition.

The geographic concentration of our loan portfolio and lending activities makes us vulnerable to a downturn in the New Jersey and metropolitan New York and Philadelphia economies.

While there is not a single employer or industry in our market area on which a significant number of our customers are dependent, a substantial portion of our loan portfolio is comprised of loans secured by property located in northern New Jersey and in metropolitan New York and Philadelphia. This makes us vulnerable to a downturn in the local economy and real estate markets. Adverse conditions in the local economy such as unemployment, recession, a catastrophic event or other factors beyond our control could impact the ability of our borrowers to repay their loans, which could impact our net interest income. Decreases in local real estate values caused by economic conditions, recent changes in tax laws or other events could adversely affect the value of the property used as collateral for our loans, which could cause us to realize a loss in the event of a foreclosure. Further, deterioration in local economic conditions could drive the level of loan losses beyond the level we have provided for in our allowance for loan losses, which in turn could necessitate an increase in our provision for loan losses and a resulting reduction to our earnings and capital.

Economic conditions could result in increases in our level of non-performing loans and/or reduce demand for our products and services, which could have an adverse effect on our results of operations.

Prolonged deteriorating economic conditions could significantly affect the markets in which we do business, the value of our loans and securities, and our ongoing operations, costs and profitability. Further, declines in real estate values and sales volumes and elevated unemployment levels may result in higher loan delinquencies, increases in our non-performing and classified assets and a decline in demand for our products and services. These events may cause us to incur losses and may adversely affect our financial condition and results of operations. Reduction in problem assets can be slow, and the process can be exacerbated by the condition of the properties securing non-performing loans and the lengthy foreclosure process in New Jersey. To the extent that we must work

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through the resolution of assets, economic problems may cause us to incur losses and adversely affect our capital, liquidity, and financial condition.

Risks Related to Our Growth Strategies

Our business strategy includes growth, and our financial condition and results of operations could be negatively affected if we fail to grow or fail to manage our growth effectively. Growing our operations could also cause our expenses to increase faster than our revenues.

Our business strategy includes growth in assets and deposits and the scale of our operations. Achieving such growth will require us to attract customers that currently bank at other financial institutions in our market area. Our ability to successfully grow will depend on a variety of factors, including our ability to attract and retain experienced bankers, the continued availability of desirable business opportunities, competition from other financial institutions in our market area and our ability to manage our growth. Growth opportunities may not be available or we may not be able to manage our growth successfully. If we do not manage our growth effectively, our financial condition and operating results could be negatively affected. Furthermore, there can be considerable costs involved in expanding deposit and lending capacity that generally require a period of time to generate the necessary revenues to offset their costs, especially in areas in which we do not have an established presence and that require alternative delivery methods. Accordingly, any such business expansion can be expected to negatively impact our earnings for some period of time until certain economies of scale are reached. Our expenses could be further increased if we encounter delays in modernizing existing facilities, opening new branches or deploying new services.

We are subject to certain risks in connection with our strategy of growing through mergers and acquisitions.

Mergers and acquisitions are currently a component of our business model and growth strategy. On November 1, 2019, we completed our acquisition of Stewardship Financial and its wholly owned subsidiary, Atlantic Stewardship Bank, and on April 1, 2020 we completed our acquisition of the Roselle Entities. It is possible that we could acquire other banking institutions, other financial services companies or branches of banks in the future. Acquisitions typically involve the payment of a premium over book and trading values and, therefore, may result in the dilution of our tangible book value per share. Our ability to engage in future mergers and acquisitions depends on various factors, including: (1) our ability to identify suitable merger partners and acquisition opportunities; (2) our ability to finance and complete transactions on acceptable terms and at acceptable prices; and (3) our ability to receive the necessary regulatory and, when required, stockholder approvals. Our inability to engage in an acquisition or merger for any of these reasons could have an adverse impact on the implementation of our business strategies. Furthermore, mergers and acquisitions involve a number of risks and challenges, including (1) our ability to achieve planned synergies and to integrate the branches and operations we acquire, and the internal controls and regulatory functions into our current operations; (2) the integration process could adversely affect our ability to maintain relationships with existing customers; (3) the diversion of management’s attention from existing operations, which may adversely affect our ability to successfully conduct our business and negatively impact our financial results and (4) our ability to identify potential asset quality issues or contingent liabilities during the due diligence process.

Risks Related to Our Business and Industry Generally

Ineffective liquidity management could adversely affect our financial results and condition.

Effective liquidity management is essential for the operation of our business. We require sufficient liquidity to meet customer loan requests, customer deposit maturities/withdrawals, payments on our debt obligations as they come due and other cash commitments under both normal operating conditions and other unpredictable circumstances causing industry or general financial market stress. Our access to funding sources in amounts adequate to finance our activities on terms that are acceptable to us could be impaired by factors that affect us specifically or the financial services industry or economy generally. Factors that could detrimentally impact our access to liquidity sources include a downturn in the geographic markets in which our loans and operations are concentrated or difficult credit markets. Our access to deposits may also be affected by the liquidity needs of our depositors. In particular, a majority of our liabilities are checking accounts and other liquid deposits, which are payable on demand or upon several days’ notice, while by comparison, a substantial majority of our assets are loans, which cannot be called or sold in the same time frame. Although we have historically been able to replace maturing deposits and advances as necessary, we might not be able to replace such funds in the future, especially if a large number of our depositors seek to withdraw their accounts, regardless of the reason. A failure to maintain adequate liquidity could materially and adversely affect our business, results of operations or financial condition.

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Changes in interest rates or the shape of the yield curve may hurt our profits and asset values and our strategies for managing interest rate risk may not be effective.

We are subject to significant interest rate risk as a financial institution with a high percentage of fixed rate loans and certificates of deposit on our balance sheet. From 2015 to 2018 the Federal Reserve Board’s Open Market Committee increased its federal funds rate target from a range of 0.00% to 0.25% to a range of 2.25% to 2.50%. However, beginning in July 2019, the Committee began lowering the target rate in response to a slowing economy, and in March 2020, lowered their target rate back to 0.00%-0.25% in response to the economic impacts of the COVID-19 crisis. This resulted in a steepening of the yield curve to a flattening of the curve as long-term rates fell shortly thereafter. Our interest-bearing liabilities reprice or mature more quickly than our interest-earning assets. Changes in the general level of interest rates can affect our net interest income by affecting the difference between the weighted-average yield earned on our interest-earning assets and the weighted-average rate paid on our interest-bearing liabilities, or interest rate spread, and the average life of our interest-earning assets and interest-bearing liabilities. Changes in interest rates also can affect: (1) our ability to originate loans; (2) the value of our interest-earning assets and our ability to realize gains from the sale of such assets; (3) our ability to obtain and retain deposits in competition with other available investment alternatives; and (4) the ability of our borrowers to repay their loans, particularly adjustable or variable rate loans. Interest rates are highly sensitive to many factors, including government monetary policies, domestic and international economic and political conditions and other factors beyond our control.

We may be adversely affected by recent changes in U.S. tax laws and regulations.

Changes in tax laws contained in the Tax Cuts and Jobs Act (“Tax Act”), which was enacted in December 2017, included a number of provisions that have had an impact on the banking industry, borrowers and the market for residential real estate. Included in this legislation was a reduction of the corporate income tax rate from 35% to 21%. In addition, other changes which could effect our borrowers include: (i) a lower limit on the deductibility of mortgage interest on single-family residential mortgage loans, (ii) the elimination of interest deductions for certain home equity loans, (iii) a limitation on the deductibility of business interest expense and (iv) a limitation on the deductibility of property taxes and state and local income taxes.

Theses changes in the tax laws may have an adverse effect on the market for, and valuation of, residential properties, and on the demand for such loans in the future, and could make it harder for borrowers to make their loan payments. In addition, these recent changes may also have a disproportionate affect on taxpayers in states with high residential home prices and high state and local taxes, such as New Jersey and New York. If home ownership becomes less attractive, demand for mortgage loans could decrease. The value of the properties securing loans in our loan portfolio may be adversely impacted as a result of the changing economics of home ownership, which could require an increase in our provision for loan losses, which would reduce our profitability and could materially adversely affect our business, financial condition and results of operations.

Additionally, legislation in New Jersey that was adopted in July 2018 has increased our state income tax liability and our overall tax expense. The legislation imposed a temporary surtax on corporations earning New Jersey allocated income in excess of $1 million of 2.5% for tax years beginning on or after January 1, 2018 through December 31, 2019, and of 1.5% for tax years beginning on or after January 1, 2020 through December 31, 2021. Subsequently, in September 2020, New Jersey enacted legislation that restored and extended the 2.5% Corporation Business Tax surcharge to apply retroactively from January 1, 2020 through December 31, 2023. The 2018 legislation also required combined filing for members of an affiliated group for tax years beginning on or after January 1, 2019, changing New Jersey’s current status as a separate return state, and limited the deductibility of dividends received. These changes are not temporary. All regulations implementing the legislative changes have not yet been issued, so we cannot fully evaluate the impact of the legislation on our overall tax expense. However, the legislation may cause us to lose the benefit of certain of our tax management strategies and may cause our total tax expense to increase.

Municipal deposits are one important source of funds for us and a reduced level of such deposits may hurt our profits.

Municipal deposits are an important source of funds for our lending and investment activities. At December 31, 2020, $599.8 million, or 8.8%, of our total deposits were comprised of municipal deposits, including public funds deposits from local government entities primarily domiciled in the State of New Jersey. Given our use of these high-average balance municipal deposits as a source of funds, our inability to retain such funds could have an adverse effect on our liquidity. In addition, our municipal deposits are primarily demand deposit accounts or short-term deposits and therefore are more sensitive to changes in interest rates. If we are forced to pay higher rates on our municipal deposits to retain those funds, or if we are unable to retain those funds and we are forced to turn to borrowing sources for our lending and investment activities, the interest expense associated with such borrowings may be higher than the rates we are paying on our municipal deposits, which could adversely affect our net income.

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We are dependent on our information technology and telecommunications systems and third-party service providers; systems failures, interruptions and cybersecurity breaches could have a material adverse effect on us.

Our business is dependent on the successful and uninterrupted functioning of our information technology and telecommunications systems and third-party service providers. The failure of these systems, or the termination of a third-party software license or service agreement on which any of these systems is based, could interrupt our operations. Because our information technology and telecommunications systems interface with and depend on third-party systems, we could experience service denials if demand for such services exceeds capacity or such third-party systems fail or experience interruptions. If significant, sustained or repeated, a system failure or service denial could compromise our ability to operate effectively, damage our reputation, result in a loss of customer business, and/or subject us to additional regulatory scrutiny and possible financial liability, any of which could have a material adverse effect on us.

Our third-party service providers may be vulnerable to unauthorized access, computer viruses, phishing schemes and other security breaches. We likely will expend additional resources to protect against the threat of such security breaches and computer viruses, or to alleviate problems caused by such security breaches or viruses. To the extent that the activities of our third-party service providers or the activities of our customers involve the storage and transmission of confidential information, security breaches and viruses could expose us to claims, regulatory scrutiny, litigation costs and other possible liabilities.

Security breaches and cybersecurity threats could compromise our information and expose us to liability, which would cause our business and reputation to suffer.

In the ordinary course of our business, we collect and store sensitive data, including our proprietary business information and that of our customers, suppliers and business partners, as well as personally identifiable information about our customers and employees. The secure processing, maintenance and transmission of this information is critical to our operations and business strategy. We, our customers, and other financial institutions with which we interact, are subject to ongoing, continuous attempts to penetrate key systems by individual hackers, organized criminals, and in some cases, state-sponsored organizations. While we have established policies and procedures to prevent or limit the impact of cyber-attacks, there can be no assurance that such events will not occur or will be adequately addressed if they do. In addition, we also outsource certain cybersecurity functions, such as penetration testing, to third party service providers, and the failure of these service providers to adequately perform such functions could increase our exposure to security breaches and cybersecurity threats. Despite our security measures, our information technology and infrastructure may be vulnerable to attacks by hackers or breached due to employee error, malfeasance or other malicious code and cyber-attacks that could have an impact on information security. Any such breach or attacks could compromise our networks and the information stored there could be accessed, publicly disclosed, lost or stolen. Any such unauthorized access, disclosure or other loss of information could result in legal claims or proceedings, liability under laws that protect the privacy of personal information, and regulatory penalties; disrupt our operations and the services we provide to customers; damage our reputation; and cause a loss of confidence in our products and services, all of which could adversely affect our financial condition and results of operations.

We must keep pace with technological change to remain competitive.

Financial products and services have become increasingly technology-driven. Our ability to meet the needs of our customers competitively, and in a cost-efficient manner, is dependent on the ability to keep pace with technological advances and to invest in new technology as it becomes available, as well as related essential personnel. In addition, technology has lowered barriers to entry into the financial services market and made it possible for financial technology companies and other non-bank entities to offer financial products and services traditionally provided by banks. The ability to keep pace with technological change is important, and the failure to do so, due to cost, proficiency or otherwise, could have a material adverse impact on our business and therefore on our financial condition and results of operations.

Because the nature of the financial services business involves a high volume of transactions, we face significant operational risks.

We operate in diverse markets and rely on the ability of our employees and systems to process a high number of transactions. Operational risk is the risk of loss resulting from our operations, including but not limited to, the risk of fraud by employees or outside persons, the execution of unauthorized transactions by employees, errors relating to transaction processing and technology, breaches of our internal control system and compliance requirements, and business continuation and disaster recovery. Insurance coverage may not be available for such losses, or where available, such losses may exceed insurance limits. This risk of loss also includes the potential legal actions that could arise as a result of an operational deficiency or as a result of noncompliance with applicable regulations, adverse business decisions or their implementation, and customer attrition due to potential negative publicity. Although our control testing has not identified any significant deficiencies in our internal control system, a breakdown in our internal control system, improper operation of our systems or improper employee actions could result in material financial loss to us, the imposition of regulatory action, and damage to our reputation.

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The building of market share through our branch office strategy, and our ability to achieve profitability on new branch offices, may increase our expenses and negatively affect our earnings.

We believe there are branch expansion opportunities within our market area and adjacent markets, including other states, and will seek to grow our deposit base by adding branches to our existing branch network. There are considerable costs involved in opening branch offices, especially in light of the capabilities needed to compete in today’s environment. Moreover, new branch offices generally require a period of time to generate sufficient revenues to offset their costs, especially in areas in which we do not have an established presence. Accordingly, new branch offices could negatively impact our earnings and may do so for some period of time. Our investments in products and services, and the related personnel required to implement new policies and procedures, take time to earn returns and can be expected to negatively impact our earnings for the foreseeable future. The profitability of our expansion strategy will depend on whether the income that we generate from the new branch offices will offset the increased expenses resulting from operating these branch offices.

Strong competition within our market area could hurt our profits and slow growth.

Our profitability depends upon our continued ability to compete successfully in our market area. We face intense competition both in making loans and attracting deposits. We continue to face stiff competition for one-to four-family residential loans from other financial service providers, including large national residential lenders and local community banks. Other competitors for one-to four-family residential loans include credit unions and mortgage brokers which keep overhead costs and mortgage rates down by selling loans and not holding or servicing them. Our competitors for commercial real estate and multifamily loans include other community banks, commercial lenders and insurance companies, some of which are larger than us and have greater resources and lending limits than we have and offer services that we do not provide, along with government agencies such as Freddie Mac, Fannie Mae and Ginnie Mae. Price competition for loans and deposits might result in us earning less on our loans and paying more on our deposits, which reduces net interest income. We expect competition to remain strong in the future.

Acts of terrorism and other external events could impact our ability to conduct business.

Financial institutions have been, and continue to be, targets of terrorist threats aimed at compromising operating and communication systems. Additionally, the metropolitan New York area and northern New Jersey remain central targets for potential acts of terrorism. Such events could cause significant damage, impact the stability of our facilities and result in additional expenses, impair the ability of our borrowers to repay their loans, reduce the value of collateral securing repayment of our loans, and result in the loss of revenue. The occurrence of any such event could have a material adverse effect on our business, operations and financial condition.

Severe weather, global pandemics, natural disasters, and other external events could significantly impact our business.

    Natural disasters, including severe weather events, global pandemics, and other adverse external events could have a significant impact on our ability to conduct business or upon third parties who perform operational services for us. Such events could affect the stability of our deposit base, impair the ability of borrowers to repay outstanding loans, impair the value of collateral securing loans, cause significant property damage, result in lost revenue, or cause us to incur additional expenses.

Economic, social and political conditions or civil unrest in the United States, may affect the markets in which we operate, our customers, our ability to provide customer service, and could have a material adverse impact on our business, results of operations, or financial condition.

Our business may be adversely affected by instability, disruption or destruction in the markets in which we operate, regardless of cause, including war, terrorism, riot, civil insurrection or social unrest, and natural or man-made disasters, including storm or other events beyond our control, such as the COVID-19 pandemic, which has resulted in the imposition of related public health measures and travel restrictions, and civil unrest. Such events can increase levels of political and economic unpredictability, result in property damage and business closures within in our markets and increase the volatility of the financial markets. Any of these effects could have a material and adverse impact on our business and results of operations. These events also pose significant risks to the Company’s personnel and to physical facilities, transportation and operations, which could materially adversely affect the Company’s financial results.

Regulation of the financial services industry is intense, and we may be adversely affected by changes in laws and regulations.

We are subject to extensive government regulation, supervision and examination. Such regulation, supervision and examination govern the activities in which we may engage, and are intended primarily for the protection of the federal deposit insurance fund and Columbia Bank’s depositors.

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In 2010 and 2011, in response to the financial crisis and recession that began in 2008, significant regulatory and legislative changes resulted in broad reform and increased regulation affecting financial institutions. The Dodd-Frank Act has created a significant shift in the way financial institutions operate and has restructured the regulation of depository institutions by merging the Office of Thrift Supervision, which previously regulated Columbia Bank, into the Office of the Comptroller of the Currency, and assigning the regulation of savings and loan holding companies to the Federal Reserve Board. The Dodd-Frank Act also created the Consumer Financial Protection Bureau to administer consumer protection and fair lending laws, a function that was formerly performed by the depository institution regulators. The Dodd-Frank Act contains various provisions designed to enhance the regulation of depository institutions and prevent the recurrence of a financial crisis such as that which occurred in 2008 and 2009. The Dodd-Frank Act has had and may continue to have a material impact on our operations, particularly through increased regulatory burden and compliance costs. Any future legislative changes could have a material impact on our profitability, the value of assets held for investment or the value of collateral for loans. Future legislative changes could also require changes to business practices and potentially expose us to additional costs, liabilities, enforcement action and reputational risk.

Federal regulatory agencies have the ability to take strong supervisory actions against financial institutions that have experienced increased loan production and losses and other underwriting weaknesses or have compliance weaknesses. These actions include the entering into of formal or informal written agreements and cease and desist orders that place certain limitations on their operations, and/or they can impose fines. If we were to become subject to a regulatory action, such action could negatively impact our ability to execute our business plan, and result in operational restrictions, as well as our ability to grow, pay dividends, repurchase stock or engage in mergers and acquisitions. See “Item 1: Business -Regulation and Supervision-Federal Banking Regulation-Capital Requirements” for a discussion of regulatory capital requirements.

Changes to LIBOR may adversely impact the value of, and the return on, our loans, securities and derivatives which are indexed to LIBOR

    We have loans, securities and debt obligations whose interest rate is indexed to the London InterBank Offered Rate (LIBOR). The United Kingdom’s Financial Conduct Authority, which is responsible for regulating LIBOR, has announced that the publication of LIBOR is not guaranteed beyond 2021and it appears highly likely that LIBOR will be discontinued or modified by 2021. At this time, no consensus exists as to what reference rate or rates or benchmarks may become acceptable alternatives to LIBOR, although the Alternative Reference Rates Committee (a group of private-market participants convened by the Federal Reserve Board and the Federal Reserve Bank of New York) has identified the Secured Overnight Financing Rate, or SOFR, as the recommend alternative to LIBOR. Uncertainty as to the adoption, market acceptance or availability of SOFR or other alternative reference rates may adversely affect the value of LIBOR-based loans and securities in our portfolio and may impact the availability and cost of hedging instruments and borrowings. The language our LIBOR-based contracts and financial instruments has developed over time and may have various events that trigger when a successor index to LIBOR would be selected. If a trigger is satisfied, contracts and financial instruments may give us or the calculation agent, as applicable, discretion over the selection of the substitute index for the calculation of interest rates. The implementation of a substitute index or the calculation of interest rates under our loan agreements may result in us incurring significant expenses in effecting the transition and may result in disputes or litigation with customers over the appropriateness or comparability to LIBOR of the substitute index, any of which could have an adverse effect on our results of operations. We continue to develop and implement plans to mitigate the risks associated with the expected discontinuation of LIBOR.

The implementation of the Current Expected Credit Loss accounting standard could require us to increase our allowance for credit losses and may have a material adverse effect on our financial condition and results of operations.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. ASU 2016-13 replaces the incurred loss model with an expected loss model, which is referred to as the current expected credit loss model, or CECL. The Company previously elected to defer the adoption of ASU 2016-13 until December 31, 2020 as permitted by the Coronavirus Aid, Relief and Economic Security Act ("CARES Act"). However, in late December 2020, the Consolidated Appropriations Act, 2021 was enacted, and extended certain provisions of the CARES Act, which allowed the Company to further extend the adoption of CECL until January 1, 2022. As a result, the Company elected to extend its adoption of CECL in accordance with the recent legislation. This standard requires earlier recognition of expected credit losses on loans and certain other instruments, compared to the incurred loss model. The change to the CECL framework requires us to greatly increase the data we must collect and review to determine the appropriate level of the allowance for credit losses. The adoption of CECL may result in greater volatility in the level of the allowance for credit losses, depending on various factors and assumptions applied in the model, such as the forecasted economic conditions in the foreseeable future and loan payment behaviors. Any increase in the allowance for credit losses, or expenses incurred to determine the appropriate level of the allowance for credit losses, may have an adverse effect on our financial condition and results of operations.

Item 1B.    Unresolved Staff Comments

    None.

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Item 2.    Properties

    We conduct our business through our main office and 61 branch offices located in Bergen, Passaic, Morris, Essex, Union, Middlesex, Monmouth, Burlington, Camden, Gloucester, Somerset and Hunterdon Counties in New Jersey. We own 28 properties and lease the other 33 properties. First Jersey Title Services, Inc. operates within one of our branch facilities.

Item 3.    Legal Proceedings

    From time to time, Columbia Financial and Columbia Bank are involved in routine legal proceedings in the ordinary course of business. Such routine legal proceedings, in the aggregate, are believed by management to be immaterial to our financial condition, results of operations and cash flows.

Item 4.    Mine Safety Disclosures

    None.

PART II

Item 5.    Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

Stock Listing and Holders

    The Company’s common stock is listed on the Nasdaq Global Select Market (“Nasdaq”) under the trading symbol “CLBK.” As of February 24, 2021 the Company had approximately 3,808 holders of record of common stock.

Dividends

The Company has not declared any dividends to holders of its common stock and we do not currently anticipate paying dividends on our common stock. Our board of directors has the authority to declare dividends on our shares of common stock, and may determine to pay dividends in the future, subject to statutory and regulatory requirements and other considerations such as the ability of Columbia Bank MHC to receive permission to waive receipt of any dividends we may determine to declare in the future.

A policy statement issued by the Federal Reserve Board provides that dividends should be paid only out of current earnings and only if our prospective rate of earnings retention is consistent with our capital needs, asset quality and overall financial condition. Regulatory guidance also provides for prior regulatory consultation with respect to capital distributions in certain circumstances, such as where a holding company’s net income for the past four quarters, net of dividends previously paid over that period, is insufficient to fully fund the dividend or a holding company’s overall rate of earnings retention is inconsistent with its capital needs and overall financial condition. In determining whether to pay a cash dividend in the future and the amount of any cash dividend, the board of directors is expected to take into account a number of factors, including regulatory capital requirements, our financial condition and results of operations, other uses of funds for the long-term value of stockholders, tax considerations, statutory and regulatory limitations and general economic conditions.

If Columbia Financial pays dividends to its stockholders, it also will be required to pay dividends to Columbia Bank MHC, unless Columbia Bank MHC is permitted by the Federal Reserve to waive the receipt of dividends. The Federal Reserve Board’s current position is to not permit a "non-grandfathered" mutual holding company, such as Columbia Bank MHC, to waive dividends declared by its subsidiary. Columbia Bank MHC may determine to apply to the Federal Reserve Board for approval to waive dividends if we determine to pay dividends to our stockholders without dilution of minority stockholders in the event of a second-step conversion to stock form. Given the Federal Reserve Board’s current position on this issue, there is no assurance that any request by Columbia Bank MHC to waive dividends from Columbia Financial would be permitted. The denial by the Federal Reserve Board of any such dividend waiver request, if sought, could significantly affect any determination by Columbia Financial to pay dividends or the amount of any dividend it might determine to pay in the future, if any.

Dividends we can declare and pay will depend, in part, upon receipt of dividends from Columbia Bank, because initially we will have no source of income other than dividends from Columbia Bank and earnings from the investment of the net proceeds from the minority stock offering that were retained by Columbia Financial and interest payments received in connection with the loan to our employee stock ownership plan. Regulations of the Federal Reserve Board and the Office of the Comptroller of the Currency impose limitations on “capital distributions” by savings institutions. See “Item 1: Business-Regulation And Supervision-Federal Banking Regulation-Capital Distributions.”

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Stock Performance Graph

The following graph provided by S&P Global Market Intelligence compares the cumulative total return of the Company’s common stock with the cumulative total return of the Nasdaq Composite Index, SNL Thrift Index ($5 billion to $10 billion) and SNL Thrift MHCs Index. The graph assumes $100 was invested on April 20, 2018, at the end of the first day of trading of the Company’s common stock. Cumulative total return assumes reinvestment of all dividends. The performance graph is being furnished solely to accompany this report pursuant to Item 201(e) of Regulation S-K, and is not being filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and is not to be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

	Period Ending
Index	4/20/2018	12/31/2018	12/31/2019	12/31/2020
Columbia Financial, Inc.	100.00	99.16	109.86	100.91
NASDAQ Composite Index	100.00	93.59	127.93	185.39
SNL Thrift $5B-$10B Index	100.00	86.98	106.37	90.71
SNL Thrift MHCs Index	100.00	101.57	123.31	113.10
Source: S&P Global Market Intelligence

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Equity Compensation Plan Information

    The following table sets forth information about the Company’s common stock that may be issued upon the exercise of stock options, warrants and rights under all of the Company’s equity compensation plans as of December 31, 2020:

	(A)	(B)		(C)
Plan Category	Number of Securities to be Issued Upon Exercise of Outstanding options	Weighted Average Exercise Price of Outstanding Options		Number of Securities Remaining Available for Future Issuance Under Equity Compensation plans (Excluding Securities Reflected in Column (A))
Equity compensation plans approved by stockholders:
2019 Equity Incentive Plan	3,798.628	$	15.66	1,969,941
Equity compensation plans not yet approved by stockholders:
None.	—	—		—
Total	3,798.628	$	15.66	1,969,941

Issuer Purchases of Equity Securities

The following table reports information regarding repurchases of the Company’s common stock during the quarter ended December 31, 2020:

Period	Total Number of Shares (2)	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs (1)	Maximum Number of Shares that May Yet Be Purchased Under the Plans or Programs
October 1 - 31, 2020	1,516,966	$	12.36	1,516,710	2,858,358
November 1 - 30, 2020	973,728	12.36		973,600	1,884,758
December 1 - 31, 2020	1,017,723	15.15		1,015,700	869,058
Total	3,508,417	$	13.66	3,506,010

(1)    On September 10, 2020, the Company announced that its Company's Board of Directors authorized a new stock repurchase program to acquire up to 5,000,000 shares of the Company's issued and outstanding common stock, commencing on September 15, 2020. On February 1, 2021, the Company announced that its Board of Directors authorized a new stock repurchase program to acquire up to 5,000,000 shares, or approximately 4.5%, of the Company's then currently issued and outstanding common stock, commencing upon the completion of the Company’s existing stock repurchase program that was approved in September 2020.

(2)    During the three months ended December 31, 2020, 736 shares were repurchased pursuant to forfeitures and 1,671 shares were repurchased for taxes related to the 2019 Equity Incentive Plan and not as part of a share repurchase program.

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Item 6.    Selected Consolidated Financial and Other Data

    The summary financial information presented below is derived in part from our consolidated financial statements. The following is only a summary and should be read in conjunction with the consolidated financial statements and notes beginning on page 82. The information as of December 31, 2020 and 2019 and for the years ended December 31, 2020, 2019 and 2018, is derived in part from the audited consolidated financial statements that appear in this Annual Report on Form 10-K. The information at December 31, 2018 and 2017 and September 30, 2017 and 2016 and for the years ended September 30, 2017 and 2016 is derived in part from our audited consolidated financial statements that do not appear in this Annual Report on Form 10-K. The information at or for the year ended December 31, 2017 is unaudited. The information presented below reflects the Company on a consolidated basis and does not include the financial condition, results of operations or other data of Columbia Bank MHC.

	At December 31,								At September 30,
	2020		2019		2018		2017		2017		2016
	(In thousands)
Financial Condition Data:
Total assets	$	8,798,536	$	8,188,694	$	6,691,618	$	5,766,500	$	5,429,328	$	5,037,412
Total cash and cash equivalents	422,957		75,547		42,201		65,498		100,975		45,694
Debt securities available for sale	1,316,952		1,098,336		1,032,868		710,570		557,176		771,779
Debt securities held to maturity	262,720		285,756		262,143		239,618		132,939		—
Loans receivable, net (1)	6,107,094		6,135,857		4,916,840		4,400,470		4,307,623		3,932,242
Deposits	6,778,624		5,645,842		4,413,873		4,263,315		4,123,428		3,822,815
Borrowings	799,364		1,407,022		1,189,180		929,057		733,043		681,990
Stockholder's equity	1,011,287		982,517		972,060		472,070		475,914		439,664
(1) Loans are shown net of allowance for loan losses, deferred costs and fees, purchased premiums and discounts.

	For the Years Ended December 31,								For the Years Ended September 30,
	2020		2019		2018		2017		2017		2016
	(In thousands)
Operating Data:
Interest income	$	295,711	$	261,083	$	226,290	$	189,274	$	184,226	$	168,977
Interest expense	74,138		88,712		62,256		45,965		44,446		43,962
Net interest income	221,573		172,371		164,034		143,309		139,780		125,015
Provision for loan losses	18,447		4,224		6,677		9,826		6,426		417
Net interest income after provision for loan losses	203,126		168,147		157,357		133,483		133,354		124,598
Non-interest income	31,270		31,636		21,688		16,818		17,172		18,927
Non-interest expense	158,139		128,701		145,386		105,421		103,446		93,769
Income before income tax expense	76,257		71,082		33,659		44,880		47,080		49,756
Income tax expense	18,654		16,365		10,923		20,123		16,008		16,803
Net income	$	57,603	$	54,717	$	22,736	$	24,757	$	31,072	$	32,953

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	At or For the Years Ended December 31,											At or For the Years Ended September 30,
	2020			2019			2018			2017		2017		2016
Performance Ratios:
Return on average assets	0.66		%	0.77		%	0.36		%	0.46	%	0.60	%	0.67	%
Core return on average assets (1)	0.72			0.77			0.79			0.55		0.70		0.67
Return on average equity	5.67			5.50			2.87			5.37		6.86		7.52
Core return on average equity (2)	6.17			5.51			6.12			6.27		7.93		7.52
Interest rate spread (3)	2.47			2.20			2.45			2.62		2.60		2.48
Net interest margin (4)	2.72			2.58			2.74			2.82		2.80		2.69
Non-interest expense to average assets	1.81			1.82			2.30			1.97		1.98		1.91
Efficiency ratio	62.54			63.09			78.28			65.84		65.91		65.14
Core efficiency ratio (5)	59.65			62.54			59.60			62.80		62.94		65.06
Average interest-earning assets to average interest-bearing liabilities	128.87			128.82			127.27			122.00		122.16		121.32
Average equity to average assets	11.62			14.04			12.53			8.61		8.68		8.92
Basic and diluted earnings per share	$	0.52		$	0.49		$	0.20		N/A		N/A		N/A
Capital Ratios for Columbia Financial:
Total capital (to risk-weighted assets)	18.54		%	17.25		%	23.45		%	15.01	%	15.11	%	15.93	%
Tier 1 capital (to risk-weighted assets)	17.29			16.05			22.19			13.76		13.85		14.68
Common equity tier 1capital (to risk weighted assets)	17.17			15.94			22.19			12.55		12.60		13.29
Tier 1 capital (to adjusted total assets)	11.38			12.92			15.75			10.54		10.59		10.70
Capital Ratios for Columbia Bank:
Total capital (to risk-weighted assets)	16.05		%	14.25		%	19.04		%	14.90	%	14.95	%	15.67	%
Tier 1 capital (to risk-weighted assets)	14.80			13.21			17.79			13.64		13.69		14.42
Common equity tier 1capital (to risk weighted assets)	14.80			13.21			17.79			13.64		13.69		14.42
Tier 1 capital (to adjusted total assets)	9.72			10.25			12.60			10.44		10.47		10.56
Asset Quality Ratios:
Allowance for loan losses to total gross loans	1.21		%	1.00		%	1.26		%	1.31	%	1.26	%	1.30	%
Allowance for loan losses to total non-performing loans	915.60			922.82			2,235.28			891.62		854.31		424.44
Net charge-offs to average outstanding loans	0.09			0.09			0.05			0.08		0.09		0.14
Non-performing loans to total gross loans	0.13			0.11			0.06			0.15		0.15		0.31
Non-performing assets to total assets	0.09			0.08			0.04			0.13		0.13		0.27
Other Data:
Number of offices	61			64			49			48		47		45
(1) Represents GAAP net income adjusted for material non-routine operating items as a percent of average assets.
(2) Represents GAAP net income adjusted for material non-routine operating items as a percent of average equity.
(3) Represents the difference between the weighted average yield on average interest-earning assets and the weighted average cost on average interest-bearing liabilities.
(4) Represents net interest income as a percent of average interest-earning assets.
(5) Core efficiency ratio represents our adjusted non-interest expense divided by our adjusted revenue. Core efficiency ratio is a non-GAAP financial measure derived from our efficiency ratio, which is calculated by dividing our total GAAP non-interest expense by our GAAP total income, and is adjusted for material non-routine operating items as detailed below. Management believes that the presentation of core efficiency ratio is commonly utilized by regulators and market analysts to evaluate the Company's financial condition, and believes that such information is useful to investors.

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Reported amounts are presented in accordance with U.S. generally accepted accounting principles ("GAAP"). The tables above contain certain supplemental non-GAAP information that the Company’s management uses in its analysis of the Company’s financial results. Specifically, the Company provides measures based on what it believes are its operating earnings on a consistent basis, and excludes material non-routine operating items which affect the GAAP reporting of results of operations. The Company’s management believes that providing this information to analysts and investors allows them to better understand and evaluate the Company’s core financial results for the periods presented. Because non-GAAP financial measures are not standardized, it may not be possible to compare these financial measures with other companies' non-GAAP financial measures having the same or similar names.

The following tables provides a reconciliation of GAAP to non-GAAP core net income and core efficiency ratios for each of the periods presented in the table above.

	For the Years Ended December 31,								For the Years Ended September 30,
	2020		2019		2018		2017		2017		2016
	(Dollars in thousands)
Net income:	$	57,603	$	54,717	$	22,736	$	24,757	$	31,072	$	32,953
Less: gains on securities transactions, net of tax	(279)		(2,006)		(79)		1,689		380		(655)
Add: contribution to charitable foundation, net of tax	—		—		27,466		2,744		3,910		594
Add: voluntary early retirement plan expenses, net of tax	2,255		—		—		—		—		—
Add: merger-related expenses, net of tax	1,500		2,162		—		—		—		—
Add: loss on extinguishment of debt	879		—		—		—		—		—
Add: branch closure expense, net of tax	1,075		—		—		—		—		—
Core net income	$	63,033	$	54,873	$	50,123	$	29,190	$	35,362	$	32,892

	For the Years Ended December 31,												For the Years Ended September 30,
	2020			2019			2018			2017			2017			2016
	(Dollars in thousands)
Non-interest expense	$	158,139		$	128,701		$	145,386		$	105,421		$	103,446		$	93,769
Less:
Voluntary early retirement plan expenses	(3,018)			—			—			—			—			—
Charitable contribution to foundation	—			—			(34,767)			(3,509)			(3,603)			(347)
Merger-related expenses	(1,931)			(2,755)			—			—			—			—
Loss on extinguishment of debt	(1,158)			—			—			—			—			—
Branch closure expenses	(1,434)			—			—			—			—			—
Core non-interest expense	$	150,598		$	125,946		$	110,169		$	101,912		$	99,843		$	93,422
Net interest income	221,573			172,371			164,034			143,309			139,780			125,015
Non-interest income	31,270			31,636			21,688			16,818			17,172			18,927
Total income	252,843			204,007			185,722			160,127			156,952			143,942
Add:
(Gain) loss on securities transactions	(370)			(2,612)			(116)			2,159			1,689			(355)
Core income	$	252,473		$	201,395		$	185,606		$	162,286		$	158,641		$	143,587
Core efficiency ratio	59.65		%	62.54		%	59.60		%	62.80		%	62.94		%	65.06		%

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PART II

Item 7.     Management's Discussion and Analysis of Financial Condition and Results of Operations

The objective of this section is to help potential investors understand our views on our results of operations and financial condition. You should read this discussion in conjunction with the consolidated financial statements and notes to the consolidated financial statements that appear at the end of this report.

Executive Summary

Our primary source of pre-tax income is net interest income. Net interest income is the difference between the interest we earn on our loans and securities and the interest we pay on our deposits and borrowings. Changes in levels of interest rates as well as the balances of interest-earning assets and interest-bearing liabilities affect our net interest income.

A secondary source of income is non-interest income, which is revenue we receive from providing products and services. Traditionally, the majority of our non-interest income has come from service charges, loan fees, interchange income, gains on sales of loans and securities, revenue from mortgage servicing, income from bank-owned life insurance and fee income from title insurance and wealth management businesses.

The non-interest expense we incur in operating our business consists of salaries and employee benefits expenses, occupancy expenses, depreciation, amortization and maintenance expenses and other miscellaneous expenses, such as loan expenses, advertising, insurance, professional services and federal deposit insurance premiums. Our largest non-interest expense is salaries and employee benefits, which consist primarily of salaries and wages paid to our employees, payroll taxes, and expenses for health insurance, retirement plans and other employee benefits.

Our business results are impacted by the pace of economic growth and the level of market interest rates, and the difference between short-term and long-term rates. The Federal Reserve Board is expected to keep rates on hold for the foreseeable future. The Federal Reserve reduced rates by 75 basis points in 2019, and in response to COVID-19, reduced rates again by 150 basis points in March 2020. Throughout this period, competition among banks to secure new customers, loans and deposits has remained fierce, and interest rate spreads have again declined over the last few years. We continue to adhere to our prudent underwriting standards and are committed to originating quality loans. Additionally, we have maintained relatively low levels of non-performing assets, past due loans and charge-offs, through all economic environments.

We believe that our strong capital profile positions us to advance our growth strategy by working with our customers to help them save and use credit wisely. It also allows us to continue to dedicate financial and human capital to support charitable organizations that benefit the communities we serve.

Business Strategy

Our business strategy is to continue to operate and grow a profitable community-oriented financial institution and to continue to shift our focus to more business-oriented commercial banking. We plan to achieve this by:

Increasing earnings through the growth of our balance sheet.

We intend to continue to grow our balance sheet through organic growth of loans and securities, funded by growth of deposits and borrowings. We expect that this growth will increase revenue faster than the growth of expenses, resulting in increased earnings over time.

As part of our growth strategy, we will seek to grow our loan portfolio and deposit base at consistent rates of growth. We have a diversified loan portfolio, which includes multifamily and commercial real estate loans, residential mortgage loans, residential and commercial construction loans, commercial business loans and consumer loans (primarily home equity loans and advances). While we intend to continue our focus on originations of one-to-four family residential mortgage loans as we grow our loan portfolio, we expect to continue to shift the mix of our loans over time, from residential mortgage loans, toward commercial loans and, correspondingly, shift our deposit mix toward commercial deposits, particularly non-interest-bearing checking accounts. These strategies along with continued deposit pricing discipline are expected to enhance our net interest margin.

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Expanding our commercial business relationships.

Historically, our commercial loan products have consisted primarily of loans secured by multifamily and commercial real estate and construction loans. As part of our growth strategy, we intend to continue our increased focus on commercial business lending, which offers shorter terms and variable rates, helps to manage interest rate risk exposure, and provides us with an opportunity to offer a full range of our products and services, including cash management, and deposit products to commercial customers. In 2020, our commercial business loans increased 55.8% from the year ended December 31, 2019, which was due to the origination of SBA PPP loans which represented 45.7% of the commercial business portfolio at December 31, 2020. Historically, we have focused on lending in New Jersey with only a minimal volume from neighboring states, but anticipate that we will increase the amount of loans originated outside New Jersey as we continue to grow our commercial loan business. We anticipate that any such expansion of our commercial lending to market areas outside New Jersey will increase lending and deposit opportunities in those areas and provide geographic diversification within our portfolio.

Continuing to emphasize the origination of one- to four-family residential mortgage loans.

At December 31, 2020, $1.9 billion, or 31.5%, of our total loan portfolio consisted of one-to-four family residential mortgage loans. Although we expect to shift the mix of our loans over time, from residential mortgage loans, toward commercial loans, we intend to continue to emphasize the origination of one-to-four family residential mortgage loans in the future. We believe there are opportunities to maintain and increase our residential mortgage lending in our market area, and we have made efforts to take advantage of these opportunities by increasing our origination channels.

We originate one-to-four family residential mortgage loans for our own portfolio but periodically sell these loans to third party investors with servicing retained. We offer fixed-rate and adjustable-rate residential mortgage loans, which totaled $1.7 billion and $201.1 million, respectively, at December 31, 2020. To increase the origination of adjustable-rate loans, we intend to continue originating loans that bear a fixed interest rate for a period of up to seven years after which they convert to one-year adjustable-rate loans.

Increasing fee income through continued growth of fee-based activities.

We intend to focus on growing our existing title insurance business, expanding the scope of the wealth management services we provide, and increasing our revenues from loan servicing activities to increase the amount of fees earned from our fee-based businesses. Presently, the majority of Columbia Bank’s revenue comes from net interest income and less than 13% from other sources, including title insurance fees, loan and deposit fees, bank-owned life insurance and gains and losses on the sales of securities and loans. We expect to increase fee income from enhancing interchange services, generating additional commercial loan swap fee income and expanding treasury services.

We currently offer title insurance services through our title insurance agency and offer wealth management services through a third-party networking arrangement. In order to expand both of these services and to grow our wealth management business, we have considered the acquisition of title insurance agencies and wealth management businesses in recent years and expect to actively pursue the acquisition of such fee-based businesses, as well as considering the acquisition of other fee-based businesses such as insurance agencies and specialty lending companies. We continue to explore and evaluate acquisition opportunities of fee-based businesses, but we currently have no understandings or agreements with respect to any such acquisitions.

We also intend to grow our servicing revenue by continuing to periodically sell one-to-four family residential mortgage loans that we originate to third party investors, including other financial institutions, while retaining the servicing of such loans.

Expanding our franchise through de novo branching, branch acquisitions and the possible acquisition of other financial institutions and/or financial services companies.

We believe there are branch expansion opportunities within our market area and adjacent markets, including other states, and will seek to grow our deposit base by adding branches to our existing branch network. In addition to deposit generation, our branch network also generates one-to-four family loans, home equity loans and advances and other consumer loans. While we are aware of the industry branch consolidation trends, we believe that in order to attract new customers, we need to selectively expand our network to fill in gaps in the existing footprint and into adjacent markets. We believe that new smaller branch designs, which are more cost-efficient, are more appropriately sized and staffed for the expected transaction volumes.

Our growth strategy also includes the acquisition of other financial institutions within our market area as well as in neighboring states. On November 1, 2019, we completed our acquisition of Stewardship Financial and its wholly owned subsidiary, Atlantic Stewardship Bank, and on April 1, 2020 we completed our acquisition of the Roselle Entities. We intend to continue to actively pursue the acquisition of banks and thrifts, including thrifts in the mutual and mutual holding company structure. In the past,

37

we have relied upon organic growth rather than acquisitions to grow our franchise, and there is no guarantee that we will be successful in pursuing our acquisition strategy.

Maintaining asset quality through the application of a prudent, disciplined approach to credit risk as part of an overall risk management program.

We employ a conservative, analytical approach to the assets we acquire that we have tested over many different business and interest rate cycles. This applies to our securities portfolio, which is comprised primarily of liquid, low credit-risk, government agency-backed securities, as well as, our loan portfolio. Residential loans are underwritten to secondary market standards and our commercial lending policies are designed to be consistent with industry best practices. We subject our loan portfolio to independent internal and external reviews to validate conformance to policies and stress tests to identify areas of potential risk. We have management information systems that provide regular insight into the quantity and direction of credit risk in our loan portfolio segments, including borrower and industry-specific concentrations. We employ limits on concentration risks, including the ratios of commercial real estate and construction loan portfolios to capital. We have developed reporting, analytics and stress testing that we believe provide effective oversight of these portfolios at higher concentration levels.

We employ tools to ensure we are being appropriately compensated for the risks inherent in the lending products we offer, and in the specific transactions. Our commercial loan pricing model quantifies the credit and interest rate risk embedded in our new loan originations and provides a target return hurdle.

We operate with Risk Committees, at both the management and board levels, that review changes in the quantity and direction of risk. These committees review our key risk indicators, loan portfolio and liquidity stress tests and operational and cyber risk assessments, which draw from our Asset/Liability Committee data, our loan portfolio credit metrics and treasury risk (investment/funding) metrics.

Enhancing our technology infrastructure to broaden our product capabilities and improve product delivery and efficiency.

We have embraced the latest technological developments in the banking industry, which we believe allows us to better leverage our employees by enabling them to focus on developing customer relationships, generate retail deposits in an efficient manner, expand the suite of products that we can offer to customers and allow us to compete more efficiently and effectively as we grow. In 2019, we implemented a new commercial loan underwriting and a new relationship monitoring system to better support and manage our commercial customer base. In 2020, faced with the COVID-19 pandemic, we were able to quickly enable remote employee access via the Digital Workplaces initiative, accelerating the release of several digital banking and other Fintech solutions to support our customers. We introduced a new digital mortgage system which greatly expedited the handling of mortgage, home equity and HELOC applications. Internally, we continued to utilize our CRM solutions with additional capabilities. We are in the process of introducing a digital small business lending solution, online chat and appointment scheduling and expect to continue to enhance our digital technology platforms to provide more appealing products and services to our customers and support our sales and marketing initiatives. Currently, we are in the process of upgrading our current company-wide technology infrastructure to support both organic and inorganic growth in the Bank. With the additions of a Chief Information and Digital Officer and Head of Digital Technology Officer, we are strategically positioned to plan and deliver these efforts.

Focusing on an enhanced customer experience and continued customer satisfaction.

We believe that customer satisfaction is a key to generating sustainable growth and profitability. While continually striving to ensure that our products and services meet our customers’ needs, we also encourage our officers and employees to focus on providing personal service and attentiveness to our customers in a proactive manner.

In recent years, we have enhanced our image and brand recognition within our marketplace for banking services. Our strategy continues to be focused on providing quality customer service through our convenient branch network, supported by our Call Center, where customers can speak with a Bank representative to answer questions and resolve issues during business and extended hours. We believe that our ability to close transactions and deliver our services in a timely manner is attractive to our customers and distinguishes us from other financial institutions that operate in our marketplace. Our customers enjoy access to senior executives and decision makers and the value it brings to their businesses. We also offer convenient online and mobile banking tools for customers to transact business anytime and anywhere.

We believe that many opportunities remain to deliver what our customers want in the form of exceptional service and convenience and we intend to continue to focus our operating strategy on taking advantage of these opportunities.

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Employing a stockholder-focused management of capital.

We intend to manage our capital position through the growth of assets, as well as the utilization of appropriate capital management tools, consistent with applicable regulations and policies, and subject to market conditions. Under Federal Reserve Board regulations, we were prohibited from repurchasing shares of our common stock for one year following our minority public offering that was completed in April 2018. Since June 2019, we have announced three stock repurchase programs under which we have repurchased an aggregated of 11,130,942 shares of common stock as of December 31, 2020. Most recently, on February 1, 2021, we announced that our Board of Directors authorized a new stock repurchase program to acquire up to 5,000,000 shares, or approximately 4.5%, of our then currently issued and outstanding common stock, commencing upon the completion of our existing stock repurchase program that was approved in September 2020.

Our Board of Directors has the authority to declare dividends on our shares of common stock, and may determine to pay dividends in the future, subject to statutory and regulatory requirements and other considerations such as the ability of Columbia Bank MHC to receive permission from the Federal Reserve Board to waive receipt of any dividends we may determine to declare in the future. If Columbia Financial pays dividends to its stockholders, it also will be required to pay dividends to Columbia Bank MHC, unless Columbia Bank MHC is permitted by the Federal Reserve Board to waive the receipt of dividends. The Federal Reserve Board’s current position is to not permit a "non-grandfathered" mutual holding company to waive dividends declared by its subsidiary. Columbia Bank MHC may determine to apply to the Federal Reserve Board for approval to waive dividends if we determine to pay dividends to our stockholders. Given the Federal Reserve Board’s current position on this issue, there is no assurance that any request by Columbia Bank MHC to waive dividends from Columbia Financial would be permitted. The denial by the Federal Reserve Board of any such dividend waiver request, if sought, could determine whether the board of directors of Columbia Financial determines to declare a dividend, or if so declared, could significantly limit the amount of dividends Columbia Financial would pay in the future, if any.

COVID-19

To assist customers impacted by the COVID-19 pandemic, through January 31, 2021, the Company granted commercial loan modification requests with respect to multifamily, commercial, and construction real estate loans, with current balances of $734.7 million and granted consumer-related loan modification requests with respect to one-to-four family real estate loans and home equity loans and advances with current balances of $178.1 million. Through December 31, 2020, the Company granted commercial loan modification requests with respect to multifamily, commercial, and construction real estate loans with balances of $735.1 million and consumer-related loan modification requests with respect to one-to-four family real estate loans and home equity loans and advances with balances of $180.2 million to customers affected by the COVID-19 pandemic. These short-term loan modifications are being treated in accordance with Section 4013 of the CARES Act and will not be treated as troubled debt restructurings during the short-term modification period if the loan was not in arrears at December 31, 2019. Furthermore, based on current evaluations, generally, we have continued the accrual of interest on these loans during the short-term modification period. The Consolidated Appropriations Act, 2021, which was enacted in late December 2020, extended certain provisions of the CARES Act, including provisions permitting loan deferral extension requests to not be treated as troubled debt restructurings. Commercial loan modification requests include various industries and property types.

Critical Accounting Policies

In the preparation of our consolidated financial statements, we have adopted various accounting policies that govern the application of U.S. generally accepted accounting principles (“GAAP”) and general practices within the banking industry. Our significant accounting policies are described in note 2 to the consolidated financial statements.

Certain accounting policies involve significant judgments and assumptions by us that have a material impact on the carrying value of certain assets and liabilities. We consider these accounting policies, which are discussed below, to be critical accounting policies. These assumptions, estimates and judgments we use can be influenced by a number of factors, including the general economic environment. Actual results could differ from these judgments and estimates under different conditions, resulting in a change that could have a material impact on the carrying values of our assets and liabilities and our results of operations.

Allowance for Loan Losses. The calculation of the allowance for loan losses is a critical accounting policy of the Company because of the high degree of judgment involved, the subjectivity of the assumptions used, and the potential for changes in the economic environment that could result in changes to the amount of the recorded allowance for loan losses. The allowance for loan losses is maintained at a level that management considers adequate to provide for estimated losses and impairment based upon an evaluation of known and inherent risk in the loan portfolio. The allowance consists of two elements: (1) identification of loans that must be reviewed individually for impairment and (2) establishment of an allowance for loan losses for loans collectively evaluated for impairment. We maintain a loan review system that provides a periodic review of the loan portfolio and the identification of impaired loans. The allowance for loan losses for loans individually evaluated for impairment is based on the fair value of collateral or

39

cash flows. While management uses the best information available to make such evaluations, future adjustments to the allowance may be necessary if economic conditions differ substantially from the assumptions used in making the evaluations.

The allowance for loan losses for loans collectively evaluated for impairment consists of both quantitative and qualitative loss components established for estimated losses inherent in the portfolio. The evaluation of the allowance for loan losses for loans collectively evaluated for impairment excludes impaired loans which are individually evaluated for impairment. We estimate the quantitative component of the allowance for loan losses for loans collectively evaluated for impairment by applying loss factors based upon the loan type categorization and risk ratings assigned to real estate loans and commercial business loans and by applying qualitative adjustments at the portfolio level. Quantitative loss factors give consideration to historical loss experience and migration experience by loan type over a look-back period, adjusted for a loss emergence period. Qualitative adjustments give consideration to other qualitative or environmental factors such as trends and levels of delinquencies, impaired loans, charge-offs, recoveries and loan volumes, as well as national and local economic trends and conditions. Qualitative adjustments reflect risks in the loan portfolio not captured by the quantitative loss factors and, as such, are evaluated relative to risk levels present over the look-back period. The reserves resulting from the application of both the quantitative experiences and qualitative factors are combined to arrive at the allowance for loan losses for loans collectability evaluated for impairment,

The allowance for loan losses is established through provisions for loan losses charged to income, which is based upon past loan loss experience and an evaluation of estimated losses in the current loan portfolio, including the evaluation of impaired loans. Although we believe that we have established and maintained the allowance for loan losses at appropriate levels, additional reserves may be necessary if future economic and other conditions differ substantially from the current operating environment. In addition, regulatory agencies periodically review the adequacy of our allowance for loan losses as an integral part of their examination process. Such agencies may require us to recognize additions to the allowance or additional write-downs based on their judgments about information available to them at the time of their examination.

Our financial results are affected by the changes in and the level of the allowance for loan losses. This process involves our analysis of internal and external variables, and it requires that we exercise judgment to estimate an appropriate allowance for loan losses. As a result of the uncertainty associated with this subjectivity, we cannot assure the precision of the amount reserved, should we experience sizable loan losses in any particular period. We believe the primary risks inherent in the portfolio are a general decline in the economy, a decline in real estate market values, rising unemployment, elevated unemployment, increasing vacancy rates, and increases in interest rates in the absence of economic improvement. Any one or a combination of these events may adversely affect a borrower's ability to repay its loan, resulting in increased delinquencies and loan losses. Accordingly, we have recorded loan losses at a level which is estimated to represent the current risk in its loan portfolio.

Most of our non-performing assets are collateral dependent loans which are written down to their current appraised value less estimated costs to sell. We continue to assess the collateral of these loans and update our appraisals on these loans on an annual basis. To the extent the property values decline, there could be additional losses on these non-performing assets, which may be material. Management considered these market conditions in deriving the estimated allowance for loan losses. Should economic difficulties occur, the ultimate amount of loss could vary from that estimate. For additional discussion related to the determination of the allowance for loan losses, see “Risk Management-Analysis and Determination of the Allowance for Loan Losses” and the notes to the consolidated financial statements.

Income Taxes. We are subject to the income tax laws of the various jurisdictions where we conduct business and estimate income tax expense based on amounts expected to be owed to these various tax jurisdictions. The estimated income tax expense (benefit) is reported in the Consolidated Statements of Income. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. We exercise significant judgment in evaluating the amount and timing of recognition of the resulting tax assets and liabilities. These judgments require us to make projections of future taxable income. The judgments and estimates we make in determining our deferred tax assets are inherently subjective and are reviewed on a continual basis as regulatory and business factors change.

Accrued or prepaid taxes represent the net estimated amount due to or to be received from tax jurisdictions either currently or in the future and are reported in other assets or other liabilities in our consolidated financial statements. We assess the appropriate tax treatment of transactions and filing positions after considering statutes, regulations, judicial precedent and other pertinent information and maintain tax accruals consistent with our evaluation. Changes in the estimate of accrued taxes occur periodically due to changes in tax rates, interpretations of tax laws, status of examinations by the tax authorities and newly enacted statutory, judicial and regulatory guidance that could impact the relative merits of tax positions. These changes, when they occur, impact accrued taxes and can materially affect our operating results. The Company identified no significant income tax uncertainties through the evaluation of its income tax positions as of December 31, 2020 and 2019. Therefore, the Company has no unrecognized income tax benefits as of those dates.

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As of December 31, 2020, we had net deferred tax assets totaling $7.2 million. In accordance with Accounting Standards Codification (“ASC”) Topic 740 “Income Taxes,” we use the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. A valuation allowance is established when management is unable to conclude that it is more likely than not that it will realize deferred tax assets based on the nature and timing of these items. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income tax expense in the period enacted. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. We exercise significant judgment in evaluating the amount and timing of recognition of the resulting tax assets and liabilities. These judgments require us to make projections of future taxable income. The judgments and estimates we make in determining our deferred tax assets are inherently subjective and are reviewed on a regular basis as regulatory or business factors change. Any reduction in estimated future taxable income may require us to record a valuation allowance against our deferred tax assets. A valuation allowance that results in additional income tax expense in the period in which it is recognized would negatively affect earnings. Management believes, based upon current facts, that it is more likely than not that there will be sufficient taxable income in future years to realize the federal deferred tax assets and that it is more likely than not that the benefits from certain state temporary differences will not be realized. In recognition of this risk, we have provided a valuation allowance of $3.4 million as of December 31, 2020 on the deferred tax assets related to the Bank’s state net operating losses and temporary differences.

Post-retirement Benefits. We provide certain health care and life insurance benefits, along with a split-dollar BOLI death benefit, to eligible retired employees. We accrue the cost of retiree health care and other benefits during the employees’ period of active service. We account for benefits in accordance with ASC Topic 715 “Pension and Other Post-retirement Benefits.” The guidance requires an employer to: (a) recognize in the statement of financial position the over funded or underfunded status of a defined benefit post-retirement plan measured as the difference between the fair value of plan assets and the benefit obligations; (b) measure a plan’s assets and its obligations that determine its funded status as of the end of the Company's fiscal year (with limited exceptions); and (c) recognize as a component of other comprehensive income (loss), net of tax, the actuarial gain and losses and the prior service costs and credits that arise during the period. These assets and liabilities and expenses are based upon actuarial assumptions including interest rates, rates of increase in compensation, expected rate of return on plan assets and the length of time we will have to provide those benefits. Actual results may differ from these assumptions. These assumptions are reviewed and updated at least annually and management believes the estimates are reasonable.

Pending Accounting Pronouncements

    In August 2018, the FASB issued ASU 2018-14, Compensation-Retirement Benefits-Defined Benefit Plans-General (Subtopic 715-20): Disclosure Framework-Changes to the Disclosure Requirements for Defined Benefit Plans. The amendments in this update modify the disclosure requirements for employers that sponsor defined benefit pension or other post-retirement plans by removing disclosures that no longer are considered cost beneficial, clarifying the specific requirements of disclosures, and adding disclosure requirements identified as relevant. Among other changes, the ASU adds disclosure requirements to Topic 715-20 for the weighted-average interest crediting rates for cash balance plans and other plans with promised interest crediting rates and an explanation of the reasons for significant gains and losses related to changes in benefit obligation for the period. The amendments remove disclosure requirements for the amounts in accumulated other comprehensive income expected to be recognized as components of net periodic benefit cost over the next fiscal year, the amount and timing of plan assets expected to be returned to the employer, and the effects of a one-percentage-point change in assumed health care cost trend rates on the (a) aggregate of the service and interest cost components of net periodic benefit costs and (b) benefit obligation for post-retirement health care benefits. ASU 2018-14 is effective for fiscal years beginning after December 15, 2020, including interim reporting periods within that reporting period, with early adoption permitted. The update is to be applied on a retrospective basis. The Company adopted this ASU effective January 1, 2021, and as its adoption is only disclosure related, it did not have a significant impact on the Company's consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments- Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments ("CECL"), further amended by ASU 2019-04, Codification Improvements to Topic 326, Financial Instruments-Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments. Topic 326 pertains to the measurement of credit losses on financial instruments. This update requires the measurement of all expected credit losses for financial instruments held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions and other organizations will now use forward-looking information to better determine their credit loss estimates. This update is intended to improve financial reporting by requiring timelier recording of credit losses on loans and other financial instruments held by financial institutions and other organizations. This update is effective for financial statements issued for fiscal years and interim periods beginning after December 15, 2019.

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    The Company elected to defer the adoption of the CECL methodology until December 31, 2020 as permitted by the enacted Coronavirus Aid, Relief and Economic Security Act ("CARES Act"). In late December 2020, the Consolidated Appropriations Act, 2021 was enacted, and extended certain provisions of the CARES Act, which allowed the Company to extend the adoption of CECL until January 1, 2022. The Company elected to extend its adoption of CECL in accordance with recent legislation, and will adopt the above mentioned ASUs related to Financial Instruments -Credit Losses (Topic 326) using a modified retrospective approach. Our CECL methodology includes the following key factors and assumptions for all loan portfolio segments:

•a historical loss period, which represents a full economic credit cycle utilizing internal loss experience, as well as industry and peer historical loss data;

•a single economic scenario with a reasonable and supportable forecast period of four to six quarters based on management’s current review of macroeconomic factors and the reliability of extended economic forecasts over different time horizons;

•a reversion to historical mean period (after the reasonable and supportable forecast period) using a straight-line approach that extends through the shorter of six quarters or the end of the remaining contractual term; and

•expected prepayment rates based on a combination of our historical experience and market observations.

    Based on several analyses performed, as well as an implementation analysis utilizing existing exposures and forecasts of macroeconomic conditions at December 31, 2020, we currently expect the adoption of ASU 2016-13 will result in a decrease between 10% and 20% in our allowance for loan losses and our reserves for unfunded commitments. If the Company was required to adopt CECL as of January 1, 2021, the impact of the adoption would result in a decrease in reserves consistent with the above range.

    As part of the implementation of the ASU, the Company will reconcile historical loan data, determine segmentation of the loan portfolio for application of the CECL calculation, determine the key assumptions, select calculation methods, and establish an internal control framework. We are currently finalizing the execution of our implementation controls and enhancing process documentation.

    The expected increase in the allowance for loan losses and reserve for unfunded commitments is a result of the change from an incurred loss model, which encompasses allowances for current known and inherent losses within the portfolio, to an expected loss model, which encompasses allowances for losses expected to be incurred over the life of the portfolio. Furthermore, ASU 2016-13 will necessitate that we establish an allowance for expected credit losses for certain debt securities and other financial assets; however, we do not expect these allowances to be significant.

    Future amounts of provision expense related to our allowance for loan losses and reserves for unfunded commitments will depend on the size and composition of our loan portfolio, future economic conditions and borrowers’ payment performance. Future amounts of provision related our debt securities will depend on the composition of our securities portfolio and current market conditions.

    The adoption of ASU 2016-13 is not expected to have a significant impact on our regulatory capital ratios.

    Upon adoption, any impact to the allowance for credit losses, currently the allowance for loan losses, will be reflected as an adjustment to retained earnings, net of tax.

Comparison of Financial Condition at December 31, 2020 and 2019

General

Total assets increased $609.8 million, or 7.4%, to $8.8 billion at December 31, 2020 from $8.2 billion at December 31, 2019. The increase in total assets was primarily attributable to increases in cash and cash equivalents of $347.4 million, debt securities available for sale of $218.6 million, bank-owned life insurance of $21.4 million, goodwill and intangible assets of $18.8 million, and other assets of $64.1 million. These increases were impacted by the acquisition of assets with fair values totaling $422.1 million in connection with the acquisition of the Roselle Entities. Total liabilities increased $581.1 million, or 8.1%, to $7.8 billion at December 31, 2020 from $7.2 billion at December 31, 2019. The increase was primarily attributable to an increase in deposits of $1.1 billion, or 20.1%, and an increase in accrued expenses and other liabilities of $58.9 million, or 50.0%, partially offset by a decrease in borrowings of $607.7 million, or 43.2%. The increase in total deposits was impacted by the assumption of $333.2 million in deposits in connection with the acquisition of the Roselle Entities. Stockholders’ equity increased $28.8 million, or 2.9%, to $1.0 billion at December 31, 2020 from $982.5 million at December 31, 2019, primarily due to net income of $57.6 million, an increase in additional capital of $68.5 million due to the issuance of 4,759,048 shares of Company common stock to Columbia Bank MHC in connection with the acquisition of the Roselle Entities, and improved fair values on debt securities within the available for sale portfolio of $27.2

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million, partially offset by the repurchase of approximately 7,587,142 shares of common stock totaling $108.2 million and the increase in the funded status of retirement plan obligations of $14.2 million.

Securities

Debt securities available for sale and held to maturity increased $195.6 million, or 14.1%, to $1.6 billion at December 31, 2020 from $1.4 billion at December 31, 2019. The increase in securities during 2020 was primarily impacted by the acquisition of $66.7 million in securities from Roselle Bank, coupled with an increase in the unrealized gain on the debt securities available for sale portfolio. We continue to focus on maintaining a high quality securities portfolio that provides consistent cash flows in changing interest rate environments. At December 31, 2020, our total securities portfolio was 18.0% of total assets, as compared to 16.9% at December 31, 2019.

At December 31, 2020, 91.1% of the debt securities available for sale portfolio was comprised of mortgage-backed securities and CMOs issued by Freddie Mac, Fannie Mae and Ginnie Mae. These securities are guaranteed by the issuing agency and backed by residential and multifamily mortgages. These securities are comprised of fixed rate, adjustable-rate and hybrid securities that bear a fixed rate for a specific term and thereafter, to the extent they are not prepaid, adjust periodically. At December 31, 2020, corporate debt securities comprised the next largest segment of the available for sale portfolio, totaling 5.3%. At December 31, 2020, the remainder of our available for sale securities portfolio consisted of U.S. government and agency obligations, municipal obligations and trust preferred securities, which comprised 1.9%, 1.3% and 0.4%, respectively.

At December 31, 2020, 98.1% of the debt securities held to maturity portfolio was comprised of mortgage-backed securities and CMOs issued by Freddie Mac, Fannie Mae and Ginnie Mae. These securities are guaranteed by the issuing agency and backed by residential and multifamily mortgages. These securities are comprised of fixed rate, adjustable-rate and hybrid securities that bear a fixed rate for a specific term and thereafter, to the extent they are not prepaid, adjust periodically. At December 31, 2020, the remaining 1.9% of our held to maturity securities portfolio consisted of U.S. government and agency obligations.

To mitigate the credit risk related to our securities portfolio, we primarily invest in agency and highly-rated securities. At December 31, 2020, approximately 93.9% of the total portfolio consisted of direct government obligations or government sponsored enterprise obligations, approximately 5.7% of the portfolio was rated at least investment grade and approximately 0.4% of the portfolio was not rated. Securities not rated consist primarily of short term municipal bond anticipation notes, private placement municipal notes issued and guaranteed by local municipal authorities and equity securities.

    The following table sets forth the amortized cost and fair value of securities at December 31, 2020, 2019 and 2018:

	At December 31,
	2020				2019				2018
	Amortized Cost		Fair Value		Amortized Cost		Fair Value		Amortized Cost		Fair Value
	(In thousands)
Debt securities available for sale:
U.S. government and agency obligations	$	24,425	$	25,549	$	42,081	$	42,386	$	54,821	$	54,157
Mortgage-backed securities and collateralized mortgage obligations	1,163,613		1,200,394		968,165		979,881		934,631		920,007
Municipal obligations	16,845		16,862		2,284		2,284		987		987
Corporate debt securities	67,628		69,477		68,613		69,180		54,493		53,467
Trust preferred securities	5,000		4,670		5,000		4,605		5,000		4,250
Total securities available for sale	$	1,277,511	$	1,316,952	$	1,086,143	$	1,098,336	$	1,049,932	$	1,032,868
Debt securities held to maturity:
U.S. government and agency obligations	$	5,000	$	5,001	$	20,000	$	19,960	$	23,404	$	23,241
Mortgage-backed securities and collateralized mortgage obligations	257,720		272,090		265,756		269,545		238,739		231,600
Total debt securities held to maturity	$	262,720	$	277,091	$	285,756	$	289,505	$	262,143	$	254,841
Equity securities	$	3,785	$	5,418	$	1,989	$	2,855	$	1,196	$	1,890
Total securities	$	1,544,016	$	1,599,461	$	1,373,888	$	1,390,696	$	1,313,271	$	1,289,599

    At December 31, 2020 and 2019, securities with carrying values of $164.4 million and $298.3 million, respectively, were in net unrealized loss positions that totaled $1.3 million and $2.4 million, respectively. The decrease in unrealized losses on securities in

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2020 was primarily due to the decrease in market interest rates between periods. When evaluating for impairment, we consider the duration and extent to which fair value is less than cost, the creditworthiness and near-term prospects of the issuer, the likelihood of recovering our investment, whether we have the intent to sell the security, or whether it is more likely than not that we will be required to sell the security before recovery, and other available information to determine the nature of the decline in the fair value of the securities.

At December 31, 2020, the unrealized losses in the portfolio were mainly attributed to GSE mortgage-backed securities and GSE CMOs. The temporary loss position associated with these securities was the result of changes in market interest rates relative to the coupon of the individual security and changes in credit spreads. As we do not intend to sell the securities, nor is it more likely than not that we will be required to sell the securities before the anticipated recovery, we do not consider the securities to be other-than-temporarily impaired at December 31, 2020. During the years ended December 31, 2020 and 2019, we did not record an other-than-temporary impairment charge on securities.

At December 31, 2020 and 2019, we had no securities in a single company or entity (other than United States Government and United States GSE securities) that had an aggregate book value in excess of 5% of our equity.

The following tables set forth the stated maturities and weighted average yields of securities at December 31, 2020. Certain securities have adjustable interest rates and will reprice monthly, quarterly, semi-annually or annually within the various maturity ranges.

Equity securities are not included in the table based on lack of a maturity date. The tables present contractual final maturities for mortgage-backed securities and does not reflect repricing or the effect of prepayments.

	At December 31, 2020
	One Year or Less				More Than One Year to Five Years				More Than Five Years to Ten Years				After Ten Years				Total
	Carrying Value		Weighted Average Yield		Carrying Value		Weighted Average Yield		Carrying Value		Weighted Average Yield		Carrying Value		Weighted Average Yield		Carrying Value		Weighted Average Yield
	(Dollars in thousands)
Debt securities available for sale:
U.S. government and agency obligations	$	—	—	%	$	20,876	1.97	%	$	4,673	2.62	%	$	—	—	%	$	25,549	2.07	%
Mortgage-backed securities and collateralized mortgage obligations	2,187		2.73		95,739		1.91		334,585		2.34		767,883		2.52		1,200,394		2.42
Municipal obligations	16,378		0.47		—		—		—		—		484		4.00		16,862		0.57
Corporate debt securities	5,002		0.97		23,530		2.65		40,945		3.53		—		—		69,477		3.05
Trust preferred securities	—		—		—		—		4,670		0.98		—		—		4,670		—
Total	$	23,567	0.79	%	$	140,145	2.04	%	$	384,873	2.45	%	$	768,367	2.52	%	$	1,316,952	2.42	%

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	At December 31, 2020
	More Than One Year to Five Years				More Than Five Years to Ten Years				After Ten Years				Total
	Carrying Value		Weighted Average Yield		Carrying Value		Weighted Average Yield		Carrying Value		Weighted Average Yield		Carrying Value		Weighted Average Yield
	(Dollars in thousands)
Debt securities held to maturity:
U.S. government and agency obligations	$	5,000	0.72	%	$	—	—	%	$	—	—	%	$	5,000	0.72	%
Mortgage-backed securities and collateralized mortgage obligations	71,011		2.68		42,548		3.15		144,161		3.05		257,720		2.96
Total	$	76,011	2.55	%	$	42,548	3.15	%	$	144,161	3.05	%	$	262,720	2.92	%

Loans receivable

    Total gross loans decreased $6.8 million, or 0.1%, to $6.16 billion at December 31, 2020 from $6.17 billion at December 31, 2019. One-to-four family real estate loans and multifamily and commercial real estate loans decreased $136.8 million, or 6.6%, and $102.0 million, or 3.5%, respectively, during 2020 primarily as a result of a high volume of prepayments on loans, which more than offset decreased originations volumes resulting from the pandemic. Construction loans increased $29.8 million, or 10.0%, during 2020 to $328.7 million from $298.9 million at December 31, 2019. Commercial business loans also increased $269.7 million, or 55.8%, to $752.9 million from $483.2 million at December 31, 2019 primarily as a result of the loans granted as part of the SBA PPP, which totaled $344.4 million at December 31, 2020.

Our consumer loan originations, which are primarily comprised of home equity loans and advances, continue to be impacted by weak demand. The reduction in volume was influenced by the low interest rate environment, additional tightening of underwriting on these types of loans, and newly enacted restrictions on the tax deductibility of home mortgage interest. As a result of these factors, home equity loans and advances decreased $67.0 million, or 17.2% during 2020.

The following tables present the loan portfolio for the periods indicated:

	At December 31,
	2020				2019
	Amount		Percent		Amount		Percent
	(Dollars in thousands)
Real estate loans:
One-to-four family	$	1,940,327	31.5	%	$	2,077,079	33.7	%
Multifamily and commercial	2,817,965		45.7		2,919,985		47.3
Construction	328,711		5.3		298,942		4.8
Total real estate loans	5,087,003		82.6		5,296,006		85.9
Commercial business loans	752,870		12.2		483,215		7.8
Consumer loans:
Home equity loans and advances	321,177		5.2		388,127		6.3
Other consumer loans	1,497		—		1,960		—
Total consumer loans	322,674		5.2		390,087		6.3
Total gross loans	6,162,547		100.0	%	6,169,308		100.0	%
Purchased credit-impaired loans	6,345				7,021
Net deferred loan costs, fees and purchased premiums and discounts	12,878				21,237
Allowance for loan losses	(74,676)				(61,709)
Loans receivable, net	$	6,107,094			$	6,135,857

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	At December 31,								At September, 30,
	2018				2017				2017				2016
	Amount		Percent		Amount		Percent		Amount		Percent		Amount		Percent
	(Dollars in thousands)
Real estate loans:
One-to-four family	$	1,830,186	36.9	%	$	1,615,000	36.3	%	$	1,578,835	36.3	%	$	1,553,345	39.1	%
Multifamily and commercial	2,142,154		43.2		1,870,475		42.1		1,821,982		41.9		1,558,939		39.2
Construction	261,473		5.3		233,652		5.3		218,408		5.0		188,480		4.7
Total real estate loans	4,233,813		85.4		3,719,127		83.7		3,619,225		83.2		3,300,764		83.0
Commercial business loans	333,876		6.7		277,970		6.3		267,664		6.1		177,742		4.5
Consumer loans:
Home equity loans and advances	393,492		7.9		447,920		10.0		464,962		10.7		497,797		12.5
Other consumer loans	1,108		—		998		—		1,270		—		1,331		—
Total consumer loans	394,600		7.9		448,918		10.0		466,232		10.7		499,128		12.5
Total gross loans	4,962,289		100.0	%	4,446,015		100.0	%	4,353,121		100.0	%	3,977,634		100.0	%
Net deferred loan costs, fees and purchased premiums and discounts	16,893				12,633				9,135				6,475
Allowance for loan losses	(62,342)				(58,178)				(54,633)				(51,867)
Loans receivable, net	$	4,916,840			$	4,400,470			$	4,307,623			$	4,307,729

    Loan Maturity

    The following table sets forth certain information at December 31, 2020 regarding the dollar amount of loan principal repayments becoming due during the periods indicated. The table does not include any estimate of prepayments that significantly shorten the average life of all loans and may cause our actual repayment experience to differ from that shown below. The table reflects final maturities for construction loans that convert to permanent loans. Demand loans having no stated schedule of repayments or maturity are reported as due in one year or less.

	December 31, 2020
	Real Estate
	One-to-four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Amounts due in:
One year or less	$	900	$	115,276	$	235,248	$	211,404	$	769	$	825	$	564,422
More than one year to five years	32,452		888,003		63,764		419,929		19,186		672		1,424,006
More than five years to ten years	184,703		1,360,894		14,498		96,731		63,605		—		1,720,431
More than ten years	1,722,272		453,792		15,201		24,806		237,617		—		2,453,688
Total	$	1,940,327	$	2,817,965	$	328,711	$	752,870	$	321,177	$	1,497	$	6,162,547

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    The following table sets forth all loans at December 31, 2020 that are due after December 31, 2021 and have either fixed interest rates or floating or adjustable interest rates:

	Due After December 31, 2021
	Fixed Rates		Floating or Adjustable Rates		Total
	(In thousands)
Real estate loans:
One-to-four family	$	1,738,303	$	201,124	$	1,939,427
Multifamily and commercial	990,640		1,712,049		2,702,689
Construction	21,755		71,708		93,463
Commercial business loans	461,307		80,159		541,466
Consumer loans:
Home equity loans and advances	200,369		120,039		320,408
Other consumer loans	672		—		672
Total loans	$	3,413,046	$	2,185,079	$	5,598,125

    Loan Originations and Sales

    The following table shows loans originated, purchased, sold and other reductions in loans during the periods indicated:

	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Total loans at beginning of period	$	6,197,566	$	4,979,182	$	4,458,648
Originations:
Real estate loans:
One-to-four family	589,871		499,430		430,548
Multifamily and commercial	285,719		347,867		320,845
Construction	150,482		204,838		186,726
Total real estate loans	1,026,072		1,052,135		938,119
Commercial business loans	583,713		139,922		130,542
Consumer loans:
Home equity loans and advances	67,823		93,217		68,721
Other consumer loans	98		354		113
Total consumer loans	67,921		93,571		68,834
Total loans originated	1,677,706		1,285,628		1,137,495
Purchases	—		89,774		32,251
Loans acquired	171,593		757,223		—
Less:
Principal payments, repayments, and other items, net	(1,486,288)		(685,862)		(601,611)
Loan sales	(147,377)		(113,617)		(35,654)
Securitization of loans	(117,259)		(21,615)		—
Transfer of loans receivable to loans held-for-sale	(114,171)		(93,147)		(11,696)
Transfer to real estate owned	—		—		(251)
Total loans receivable at end of period	$	6,181,770	$	6,197,566	$	4,979,182

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    Deposits

    Our primary source of funds is our deposits, which are comprised of non-interest bearing and interest-bearing transaction accounts, money market deposit accounts, savings and club accounts and certificates of deposit.

Deposits increased $1.1 billion, or 20.1%, to $6.8 billion at December 31, 2020 from $5.6 billion at December 31, 2019. The increase in deposits was partially driven by $333.2 million in deposits assumed in connection with the acquisition of the Roselle Entities. The balances of non-interest bearing demand, interest-bearing demand, money market, and savings and club accounts, increased as we strategically priced our deposit products and utilized marketing campaigns to attract non-maturity deposits. Municipal deposits totaled $599.8 million at December 31, 2020 compared to $526.0 million at December 31, 2019. We continue our efforts to emphasize deposit taking though various channels.

During 2020, non-interest bearing demand accounts increased $396.2 million, or 41.3%, due to an increase in commercial checking and Advantage Plus checking account balances. During 2020, interest-bearing demand accounts increased $468.8 million, or 27.2%, due to an increase in our Yield Plus product and an increase in municipal deposits of $73.8 million, or 14.0%. Money market accounts increased $177.8 million, or 43.3%, while certificates of deposits decreased $54.8 million, or 2.7%. We have focused on obtaining non-maturity deposit products by offering attractive pricing and promotions and by deepening our existing customer relationships.

The following table sets forth the deposit balances as of the periods indicated:

	At December 31,
	2020				2019				2018
	Amount		Percent of Total Deposits		Amount		Percent of Total Deposits		Amount		Percent of Total Deposits
	(Dollars in thousands)
Non-interest-bearing demand	$	1,354,605	17.0	%	$	958,442	17.0	%	$	723,794	16.4	%
Interest-bearing demand	2,189,164		30.4		1,720,383		30.5		1,219,381		27.6
Money market accounts	588,180		7.3		410,392		7.3		259,694		5.9
Savings and club deposits	688,309		9.6		543,480		9.6		510,688		11.6
Certificates of deposit	1,958,366		35.7		2,013,145		35.7		1,700,316		38.5
Total deposits	$	6,778,624	100.0	%	$	5,645,842	100.0	%	$	4,413,873	100.0	%

    We are required to pledge securities to secure municipal deposits. At December 31, 2020 and 2019, we had pledged securities totaling $546.3 million and $398.2 million, respectively, to secure these deposits.

    The following table sets forth the deposit activity for the periods indicated:

	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Beginning balance	$	5,645,842	$	4,413,873	$	4,263,315
Increase before interest credited	1,077,536		1,170,418		111,035
Interest credited	55,246		61,551		39,523
Net increase in deposits	1,132,782		1,231,969		150,558
Ending balance	$	6,778,624	$	5,645,842	$	4,413,873

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    The following table sets forth the time remaining until maturity for certificates of deposit of $100,000 or more at December 31, 2020:

	Balance
	(In thousands)
Maturity Period:
Three months or less	$	220,846
Over three through six months	228,341
Over six through twelve months	369,886
Over twelve months	201,416
Total	$	1,020,489

    The following table sets forth all of our certificates of deposit classified by interest rate as of the dates indicated:

	At December 31,
	2020		2019		2018
	(In thousands)
Less than 0.50%	$	477,849	$	19,169	$	35,706
0.50% to 0.99%	358,562		9,007		21,856
1.00% to 1.49%	181,037		123,708		260,444
1.50% to 1.99%	307,957		576,354		709,778
2.00% to 2.49%	226,922		580,882		339,036
2.50% to 2.99%	384,284		678,681		333,496
3.00% and greater	21,755		25,344		—
Total	$	1,958,366	$	2,013,145	$	1,700,316

    The following table sets forth the amount and maturities of our certificates of deposit by interest rate at December 31, 2020:

	Period to Maturity
	One Year or Less		More Than One Year to Two Years		More Than Two Years to Three Tears		More Than Three Years to Four Years		More Than Four Years		Total		Percentage of Certificate Accounts
	(Dollars in thousands)
Less than 0.50%	$	370,585	$	102,237	$	4,716	$	311	$	—	$	477,849	24.40	%
0.50% to 0.99%	294,932		41,275		3,747		155		18,453		358,562		18.31	%
1.00% to 1.49%	137,895		19,919		6,154		4,348		12,721		181,037		9.24	%
1.50% to 1.99%	241,601		44,222		8,925		6,185		7,024		307,957		15.73	%
2.00% to 2.49%	186,951		23,735		7,378		6,036		2,822		226,922		11.59	%
2.50% to 2.99%	247,888		106,056		21,655		5,824		2,861		384,284		19.62	%
3.00% and greater	14,277		135		234		159		6,950		21,755		1.11	%
Total	$	1,494,129	$	337,579	$	52,809	$	23,018	$	50,831	$	1,958,366	100.00	%

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The following tables set forth the average balances and weighted average rates of our deposit products at the dates indicated:

	For the Years Ended December 31,
	2020						2019
	Average Balance		Percent		Weighted Average Rate		Average Balance		Percent		Weighted Average Rate
	(Dollars in thousands)
Non-interest-bearing demand	$	1,215,352	19.04	%	—	%	$	776,850	16.11	%	—	%
Interest-bearing demand	1,945,075		30.47		0.65		1,420,667		29.47		1.24
Money market accounts	510,189		7.99		0.57		286,281		5.94		0.80
Savings and club deposits	623,964		9.78		0.16		495,261		10.27		0.16
Certificates of deposit	2,088,488		32.72		1.85		1,842,243		38.21		2.22
Total	$	6,383,068	100.00	%	0.87	%	$	4,821,302	100.00	%	1.28	%

	For the Year Ended December 31,
	2018
	Average Balance		Percent		Weighted Average Rate
	(Dollars in thousands)
Non-interest-bearing demand	$	704,155	15.75	%	—	%
Interest-bearing demand	1,323,766		29.61		0.86
Money market accounts	299,389		6.70		0.51
Savings and club deposits	628,746		14.06		0.16
Certificates of deposit	1,514,843		33.88		1.69
Total	$	4,470,899	100.0	%	0.88	%

Borrowings

We have the ability to utilize advances and overnight lines of credit from the FHLB to supplement our liquidity. As a member, we are required to own capital stock in the FHLB and are authorized to apply for advances on the security of such stock and certain mortgage loans and other assets, provided certain standards related to creditworthiness have been met. Advances are made under several different programs, each having its own interest rate and range of maturities. We can also utilize securities sold under agreements to repurchase to provide funding. We maintain access to the Federal Reserve Bank’s discount window and federal funds lines with correspondent banks for additional contingency funding. To secure our borrowings, we generally pledge securities and/or loans. The types of securities pledged for borrowings include, but are not limited to, government-sponsored enterprises ("GSE") including notes and government agency mortgage-backed securities and CMOs. The types of loans pledged for borrowings include, but are not limited to, one-to-four family real estate loans home equity loans and multifamily and commercial real estate loans.

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    The following table sets forth the outstanding borrowings and weighted averages at the dates or for the periods indicated:

	Years Ended December 31,
	2020			2019			2018
	(Dollars in thousands)
Maximum amount outstanding at any month-end during the year:
Lines of credit	$	186,600		$	180,300		$	195,200
FHLB advances	1,139,580			1,275,391			1,029,580
Subordinated notes	16,675			16,936			—
Junior subordinated debentures	6,949			6,932			51,258
Securities sold under repurchase agreements	—			—			10,000
Average outstanding balance during the year:
Lines of credit	$	29,859		$	77,165		$	95,193
FHLB advances	1,092,774			1,056,115			816,839
Subordinated notes	11,067			2,881			—
Junior subordinated debentures	8,481			1,253			31,422
Securities sold under repurchase agreements	1,913			—			82
Weighted average interest rate during the year:
Lines of credit	1.42		%	2.28		%	2.27		%
FHLB advances	1.62			2.39			2.09
Subordinated notes	4.05			3.92			—
Junior subordinated debentures	3.48			5.19			11.03
Securities sold under repurchase agreements	—			—			3.66
Balance outstanding at end of the year:
Lines of credit	$	—		$	107,800		$	159,600
FHLB advances	792,412			1,275,391			1,029,580
Subordinated notes	—			16,899			—
Junior subordinated debentures	6,952			6,932			—
Weighted average interest rate at end of year:
Lines of credit	—		%	1.81		%	2.60		%
FHLB advances	1.18			2.09			2.40
Subordinated notes	—			6.75			—
Junior subordinated debentures	3.20			5.09			—

Comparison of Financial Condition at December 31, 2019 and 2018

    For a comparison of the Company’s financial condition at December 31, 2019 and 2018, please see the section captioned “Comparison of Financial Condition at December 31, 2019 and 2018” in Item 7 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2019.

Results of Operations for the Year Ended December 31, 2020

    Financial Highlights

Net income was $57.6 million for the year ended December 31, 2020 as compared to $54.7 million for the year ended December 31, 2019, an increase of $2.9 million, or 5.3%. The increase was attributable to an increase in net interest income of $49.2

51

million, or 28.5%, partially offset by an increase in our provision for loan losses of $14.2 million, or 336.7%, a decrease in non-interest income of $366,000, or 1.2%, an increase in non-interest expense of $29.4 million, or 22.9%, and an increase in income tax expense of $2.3 million, or 14.0%. In 2020, the increase in net interest income was primarily attributable to a $34.6 million increase in interest income and a $14.6 million decrease in interest expense. The increase in interest income for the year ended December 31, 2020 was largely due to increases in the average balances on loans, securities and other interest-earning assets, which was the result of internal growth and the acquisitions of Stewardship Financial and the Roselle Entities, partially offset by decreases in the average yields on these assets. Net deferred fee acceleration of $2.9 million was recognized upon the forgiveness and settlement of $144.0 million of SBA PPP loans for the year ended December 31, 2020.

The increase in provision for loan losses was primarily attributable to consideration of the deterioration of economic conditions and loan performance due to the ongoing COVID-19 pandemic which resulted in increases to qualitative factors. Net charge-offs totaled $5.5 million for the year ended December 31, 2020, as compared to $4.9 million for the year ended December 31, 2019.

The decrease in non-interest income was primarily attributable to an $845,000 decrease in demand deposit account fees, a $4.3 million decrease in loan fees and service charges, and a $2.2 million decrease in gain on securities transactions, partially offset by a $4.7 million increase in the gain on sale of loans, a $774,000 increase in income from bank owned life insurance and a $1.1 million increase on other non-interest income. Fee related income decreased as the Bank supported consumer and commercial customers with hardships due to the pandemic by waiving various deposit and loan fees in 2020.

The increase in non-interest expense was primarily attributable to an increase in compensation and employee benefits expense of $16.4 million, occupancy expense of $3.0 million, loss on extinguishment of debt of $1.2 million, and other non-interest expense of $9.7 million. The increase in compensation and employee benefits expense was primarily attributable to an increase of $5.1 million in expense recorded in connection with grants made under the Company's 2019 Equity Incentive Plan. In addition, $3.0 million in expense was recorded in connection with the Company's previously announced voluntary early retirement program that was completed during the third quarter of 2020 and offered early retirement incentives for previously announced qualified employees. The increase in occupancy expense was primarily the result of an increase in the number of branch offices acquired from Stewardship Financial and Roselle Entities, and the increase in other non-interest expense was due to losses of $1.4 million recorded in connection with the branch consolidation resulting from the Stewardship Financial acquisition and also includes $5.5 million related to interest rate swap transactions.

The overall increase in our pre-tax income was mostly attributable to the increase in net interest income in the 2020 period. Income tax expense was $18.7 million for the year ended December 31, 2020, an increase of $2.3 million, or 14.0%, as compared to $16.4 million for the year ended December 31, 2019. The Company's effective tax rate was 24.5% and 23.0% for the years ended December 31, 2020 and 2019, respectively. The 2020 effective tax rate was higher than the 2019 rate as the 2019 period reflected tax benefits related to the Bank's investment subsidiary, coupled with other previously implemented tax strategies.

    Summary Income Statements

    The following table sets forth the income summary for the periods indicated:

	Years Ended December 31,
							Change 2020/2019
	2020			2019			$		%
	(Dollars in thousands)
Net interest income	$	221,573		$	172,371		$	49,202	28.5	%
Provision for loan losses	18,447			4,224			14,223		336.7	%
Non-interest income	31,270			31,636			(366)		(1.2)	%
Non-interest expense	158,139			128,701			29,438		22.9	%
Income tax expense	18,654			16,365			2,289		14.0	%
Net income	$	57,603		$	54,717		$	2,886	5.3	%
Return on average assets	0.66		%	0.77		%
Return on average equity	5.67		%	5.50		%

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Net Interest Income

    For the year ended December 31, 2020, net interest income increased $49.2 million, or 28.5%, to $221.6 million from $172.4 million for the year ended December 31, 2019. For the year ended December 31, 2020, total interest income increased $34.6 million, or 13.3%, to $295.7 million from $261.1 million for the year ended December 31, 2019. The increase in net interest income was primarily attributable to increases in average balances on loans, securities and other interest-earning assets. The yield on the loan portfolio for the year ended December 31, 2020 was 19 basis points lower than the yield for the year ended December 31, 2019, while the yield on the securities portfolio was 35 basis points lower for the 2020 period. The average yield on other interest-earning assets for the year ended December 31, 2020 decreased 426 basis points for the year ended December 31, 2019. Decreases in average yields on these portfolios for the year ended December 31, 2020 were influenced by the lower interest rate environment.

The average cost of our interest-bearing liabilities decreased to 1.17% for the year ended December 31, 2020, from 1.71% for the year ended December 31, 2019, primarily as a result of a decrease of 45 basis points in the average cost of interest-bearing deposits, which was partially offset by an increase in the average balance of deposits. For the year ended December 31, 2020, total interest expense decreased $14.6 million, or 16.4%, to $74.1 million from $88.7 million for the year ended December 31, 2019 due to a decrease in the average cost of interest-bearing liabilities. The lower interest rate environment coupled with excess liquidity from an inflow of deposits allowed the Bank to significantly reduce deposit pricing in 2020. During 2020, the average balance of our borrowings increased $6.7 million while the total cost of borrowings decreased 74 basis points. During the year ended December 31, 2020, $122.6 million of FHLB borrowings with an average rate of 2.18% and original contractual maturities through July 2021 were prepaid, and $27.0 million of FHLB borrowings acquired in our Roselle Bank acquisition with an average rate of 2.65% and original contractual maturities through November 2023 were prepaid. The prepayments were funded by excess cash liquidity. The transactions were accounted for as early debt extinguishments resulting in a total loss of $1.2 million.

    A provision for loan losses of $18.4 million was recorded for the year ended December 31, 2020 compared to a provision of $4.2 million for the year ended December 31, 2019. The increase in provision for loan losses was primarily attributable to consideration of the deterioration of economic conditions and loan performance due to the ongoing COVID-19 pandemic which resulted in increases to qualitative factors. Net charge-offs totaled $5.5 million for the year ended December 31, 2020, as compared to $4.9 million for the year ended December 31, 2019. We charge-off any collateral or cash flow deficiency on all classified loans once they are 90 days delinquent or earlier if management believes the collectability of the loan is unlikely. The provision for loan losses was determined by management to be an amount necessary to maintain a balance of allowance for loan losses at a level that considers all known and current losses in the loan portfolio as well as potential losses due to unknown factors such as the economic environment. Changes in the provision were based on management’s analysis of various factors such as: estimated fair value of underlying collateral, recent loss experience in particular segments of the portfolio, levels and trends in delinquent loans, and changes in general economic and business conditions. At December 31, 2020, the allowance for loan losses totaled $74.7 million, or 1.21% of total loans outstanding, compared to $61.7 million, or 1.00% of total loans outstanding, as of December 31, 2019. An analysis of the changes in the allowance for loan losses is presented under “Risk Management-Analysis and Determination of the Allowance for Loan Losses” below.

    Non-Interest Income

    The following table sets forth a summary of non-interest income for the periods indicated:

	Years Ended December 31,
	2020		2019
	(In thousands)
Demand deposit account fees	$	3,633	$	4,478
Bank-owned life insurance	6,620		5,846
Title insurance fees	5,034		4,981
Loan fees and service charges	2,419		6,707
Gain on securities transactions	370		2,612
Change in fair value of equity securities	767		305
Gain on sale of loans	5,444		785
Other non-interest income	6,983		5,922
Total	$	31,270	$	31,636

    For the year ended December 31, 2020, non-interest income decreased $366,000, or 1.2%, to $31.3 million from $31.6 million for the year ended December 31, 2019. In 2020, the decrease in non-interest income was primarily attributable to an $845,000

53

decrease in demand deposit account fees, a $4.3 million decrease in loan fees and service charges, and a $2.2 million decrease in gain on securities transactions, partially offset by a $4.7 million increase in the gain on sale of loans, a $774,000 increase in income from bank owned life insurance and a $1.1 million increase on other non-interest income. Fee related income decreased as the Bank supported consumer and commercial customers with hardships due to the pandemic by waiving various deposit and loan fees in 2020. Other non-interest income increased as a result of check card, annuity and other related income.

    Non-Interest Expense

    The following table sets forth an analysis of non-interest expense for the periods indicated:

	Years Ended December 31,
	2020		2019
	(In thousands)
Compensation and employee benefits	$	100,687	$	84,256
Occupancy	19,170		16,180
Federal deposit insurance premiums	1,901		895
Advertising	2,641		3,932
Professional fees	5,810		5,913
Data processing	3,342		3,001
Merger-related expenses	1,931		2,755
Loss on extinguishment of debt	1,158		—
Other non-interest expense	21,499		11,769
Total	$	158,139	$	128,701

    For the year ended December 31, 2020, non-interest expense increased $29.4 million, or 22.9%, to $158.1 million from $128.7 million for the year ended December 31, 2019. The increase in non-interest expense was primarily attributable to an increase in compensation and employee benefits expense of $16.4 million, occupancy expense of $3.0 million, loss on extinguishment of debt of $1.2 million, and other non-interest expense of $9.7 million. The increase in compensation and employee benefits expense was primarily attributable to an increase of $5.1 million in expense recorded in connection with grants made under the Company's 2019 Equity Incentive Plan. In addition, $3.0 million in expense was recorded in connection with the Company's voluntary early retirement program that was completed during the third quarter of 2020 and offered early retirement incentives for qualified employees. The increase in occupancy expense was primarily the result of an increase in the number of branch offices acquired from Stewardship Financial and the Roselle Entities, and the increase in other non-interest expense was due to losses of $1.4 million recorded in connection with the branch consolidation resulting from the Stewardship merger and also includes $5.5 million related to interest rate swap transactions.

     For the year ended December 31, 2020, our core efficiency ratio was 59.7% compared to 62.5% for the year ended December 31, 2019. Core efficiency ratio is a non-GAAP measure derived from our efficiency ratio, which is calculated by dividing our GAAP non-interest expenses by our GAAP revenue, and is adjusted for unusual or one-time charges or non-routine events. Management believes that the presentation of core efficiency ratio assists investors, regulators and market analysts in understanding the impact of these non-recurring items on our efficiency ratio. For a reconciliation of our core efficiency ratio, see page 35 of this report.

    Income Tax Expense

    We recorded income tax expense of $18.7 million for the year ended December 31, 2020, reflecting an effective tax rate of 24.5%, compared to income tax expense of $16.4 million for 2019, reflecting an effective tax rate of 23.0%. The 2020 effective tax rate was higher than the 2019 rate as the 2019 period reflected tax benefits related to the Bank's investment subsidiary, coupled with other previously implemented tax strategies.

As of December 31, 2020, we had net deferred tax assets totaling $7.2 million. These deferred tax assets can only be realized if we generate taxable income in the future. We regularly evaluate the realizability of deferred tax asset positions. In determining whether a valuation allowance is necessary, we consider the level of taxable income in prior years to the extent that carrybacks are permitted under current tax laws, as well as estimates of future pre-tax and taxable income and tax planning strategies that would, if necessary, be implemented. We have provided a valuation allowance of $3.4 million as of December 31, 2020 on the deferred tax assets related to the Bank’s state net operating losses and temporary differences.

54

Results of Operations for the Year Ended December 31, 2019

    Financial Highlights

Net income was $54.7 million for the year ended December 31, 2019 as compared to $22.7 million for the year ended December 31, 2018, an increase of $32.0 million, or 140.7%. The increase was attributable to increases in net interest income of $8.3 million, or 5.1%, and non-interest income of $9.9 million, or 45.9%, and decreases in our provision for loan losses of $2.5 million, or 36.7% in 2019, and in non-interest expense of $16.7 million, or 11.5%, partially offset by an increase in income tax expense of $5.4 million, or 49.8%. In 2019, the increase in non-interest income was primarily attributable to an increase in income from loan fees and service charges of $4.2 million, which included an increase in income from swap transactions of $4.1 million, and an increase in gains on the sale of securities of $2.5 million. There was an increase of $979,000 in other non-interest income which primarily related to increases in ATM, check card and other related income.

The decrease in non-interest expense was primarily attributable to a one-time charitable contribution to the Columbia Bank Foundation of $34.8 million being included in the 2018 period. Excluding the impact of this one-time contribution in 2018, non-interest expense increased $18.1 million, or 16.3%, for the year ended December 31, 2019. This increase was attributable to an increase in compensation and employee benefits expense of $7.0 million, an increase in occupancy expense of $1.6 million, an increase in professional fees of $1.3 million, an increase in other non-interest expense of $6.2 million and merger-related expenses of $2.8 million recorded in the 2019 period, partially offset by a $998,000 decrease in federal deposit insurance premiums. The higher compensation and employee benefits expense was primarily attributable to $3.7 million in expense recorded in connection with grants made under the Company's 2019 Equity Incentive Plan, coupled with the cost of new hires. The increase in occupancy expense was primarily the result of an increase in depreciation expense related to newly opened branches and facility renovations, while the increase in professional fees was the result of higher legal, accounting and consulting fees commensurate with being a public company. The federal deposit insurance premium expense decreased during the year ended December 31, 2019, as the Federal Deposit Insurance Corporation's reserve rates exceeded a limit at which a small bank assessment credit was applied against premiums due.

The overall increase in our pre-tax income was mostly attributable to the previously noted charitable contribution included in the 2018 period. Income tax expense increased $5.4 million, or 49.8%, to $16.4 million for the year ended December 31, 2019, from $10.9 million for the year ended December 31, 2018. The Company's effective tax rate was 23.0% and 32.5% for the years ended December 31, 2019 and 2018, respectively. The 2018 income tax expense and resulting effective tax rate was impacted by the net loss resulting from the one-time charitable contribution. The 2019 income tax expense and resulting decrease in the effective tax rate was primarily driven by maximizing the tax benefits related to the Bank's investment subsidiary, coupled with other previously implemented tax strategies.

    Summary Income Statements

    The following table sets forth the income summary for the periods indicated:

	Years Ended December 31,
							Change 2019/2018
	2019			2018			$		%
	(Dollars in thousands)
Net interest income	$	172,371		$	164,034		$	8,337	5.1	%
Provision for loan losses	4,224			6,677			(2,453)		(36.7)	%
Non-interest income	31,636			21,688			9,948		45.9	%
Non-interest expense	128,701			145,386			(16,685)		(11.5)	%
Income tax expense	16,365			10,923			5,442		49.8	%
Net income	$	54,717		$	22,736		$	31,981	140.7	%
Return on average assets	0.77		%	0.36		%
Return on average equity	5.50		%	2.87		%

    Net Interest Income

    For the year ended December 31, 2019, net interest income increased $8.3 million, or 5.1%, to $172.4 million from $164.0 million for the year ended December 31, 2018. For the year ended December 31, 2019, total interest income increased $34.8 million,

55

or 15.4%, to $261.1 million from $226.3 million for the year ended December 31, 2018. The increase in net interest income was primarily attributable to increases in average balances and yields on both the loan and securities portfolios. The yield on the loan portfolio for the year ended December 31, 2019 was 14 basis points higher than the yield for the year ended December 31, 2018, while the yield on the securities portfolio was 6 basis points higher for the 2019 period.

The average rate of our interest-bearing liabilities increased to 1.71% for the year ended December 31, 2019, from 1.32% for the year ended December 31, 2018, primarily as a result of an increase of 47 basis points in the average rate on deposits, partially offset by a decrease of 2 basis points in the average rate on borrowings. For the year ended December 31, 2019 total interest expense increased $26.5 million, or 42.5%, to $88.7 million from $62.3 million for the year ended December 31, 2018 due to an increase in both the volume and rate of interest-bearing liabilities. During 2019, the average balance of our borrowings increased $193.7 million while the total cost of borrowings decreased 2 basis points. The cost of interest-bearing deposits increased 47 basis points in 2019 as a result of an increase in overall interest rates, coupled with an increase in the average balance of $277.7 million, primarily in higher yielding certificates of deposits.

    Provision for Loan Losses

    A provision for loan losses of $4.2 million was recorded for the year ended December 31, 2019 compared to a provision of $6.7 million for the year ended December 31, 2018. The decrease was primarily driven by a decrease in historical loss factors, partially offset by the growth in the loan portfolio. Net charge-offs increased to $4.9 million for the year ended December 31, 2019, as compared to $2.5 million for the year ended December 31, 2018. We charge-off any collateral or cash flow deficiency on all classified loans once they are 90 days delinquent or earlier if management believes the collectability of the loan is unlikely. The provision for loan losses was determined by management to be an amount necessary to maintain a balance of allowance for loan losses at a level that considers all known and current losses in the loan portfolio as well as potential losses due to unknown factors such as the economic environment. Changes in the provision were based on management’s analysis of various factors such as: estimated fair value of underlying collateral, recent loss experience in particular segments of the portfolio, levels and trends in delinquent loans, and changes in general economic and business conditions. At December 31, 2019, the allowance for loan losses totaled $61.7 million, or 1.00% of total loans outstanding, compared to $62.3 million, or 1.26% of total loans outstanding, as of December 31, 2018. An analysis of the changes in the allowance for loan losses is presented under “Risk Management-Analysis and Determination of the Allowance for Loan Losses” below.

Non-Interest Income

    The following table sets forth a summary of non-interest income for the periods indicated:

	Years Ended December 31,
	2019		2018
	(In thousands)
Demand deposit account fees	$	4,478	$	3,987
Bank-owned life insurance	5,846		5,208
Title insurance fees	4,981		4,297
Loan fees and service charges	6,707		2,519
Gain (loss) on securities transactions	2,612		116
Gain (loss) on sale of loans	785		618
Other non-interest income	5,922		4,943
Total	$	31,636	$	21,688

    For the year ended December 31, 2019, non-interest income increased $9.9 million, or 45.9%, to $31.6 million from $21.7 million for the year ended December 31, 2018. In 2019, the increase in non-interest income was primarily attributable to an increase in income from loan fees and service charges of $4.2 million, which included an increase in income from swap transactions of $4.1 million, and an increase in gains on the sale of securities of $2.5 million. There was an increase of $979,000 in other non-interest income which primarily related to increases in ATM, check card and other related income.

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    Non-Interest Expense

    The following table sets forth an analysis of non-interest expense for the periods indicated:

	Years Ended December 31,
	2019		2018
	(In thousands)
Compensation and employee benefits	$	84,256	$	77,226
Occupancy	16,180		14,547
Federal deposit insurance premiums	895		1,893
Advertising	3,932		4,137
Professional fees	5,913		4,619
Data processing	3,001		2,600
Charitable contribution to foundation	—		34,767
Merger-related expenses	2,755		—
Other non-interest expense	11,769		5,597
Total	$	128,701	$	145,386

    For the year ended December 31, 2019, non-interest expense decreased $16.7 million, or 11.5%, to $128.7 million from $145.4 million for the year ended December 31, 2018. The decrease in non-interest expense was primarily attributable to a one-time charitable contribution to the Columbia Bank Foundation of $34.8 million being included in the 2018 period. Excluding the impact of this one-time contribution in 2018, non-interest expense increased $18.1 million, or 16.3%, for the year ended December 31, 2019. This increase was attributable to an increase in compensation and employee benefits expense of $7.0 million, an increase in occupancy expense of $1.6 million, an increase in professional fees of $1.3 million, an increase in other non-interest expense of $6.2 million and merger-related expenses of $2.8 million recorded in the 2019 period, partially offset by a $998,000 decrease in federal deposit insurance premiums. The higher compensation and employee benefits expense was primarily attributable to $3.7 million in expense recorded in connection with grants made under the Company's 2019 Equity Incentive Plan, coupled with the cost of new hires. The increase in occupancy expense was primarily the result of an increase in depreciation expense related to newly opened branches and branch renovations, while the increase in professional fees was the result of higher legal, accounting and consulting fees commensurate with being a public company. The federal deposit insurance premium expense decreased during the year ended December 31, 2019, as the Federal Deposit Insurance Corporation's reserve rates exceeded a limit at which a small bank assessment credit was applied against premiums due.

For the year ended December 31, 2019, our core efficiency ratio was 62.5% compared to 59.6% for the year ended December 31, 2018. Core efficiency ratio is a non-GAAP measure derived from our efficiency ratio, which is calculated by dividing our GAAP non-interest expenses by our GAAP revenue, and is adjusted for unusual or one-time charges or non-routine events. Management believes that the presentation of core efficiency ratio assists investors, regulators and market analysts in understanding the impact of these non-recurring items on our efficiency ratio. For a reconciliation of our core efficiency ratio, see page 35 of this report

    Income Tax Expense

We recorded income tax expense of $16.4 million for the year ended December 31, 2019, reflecting an effective tax rate of 23.0%, compared to income tax expense of $10.9 million for 2018, reflecting an effective tax rate of 32.5%. The 2018 income tax expense and resulting effective tax rate was impacted by the net loss resulting from the one-time charitable contribution. The 2019 income tax expense and resulting decrease in the effective tax rate was primarily driven by maximizing the tax benefits related to the Bank's investment subsidiary, coupled with other previously implemented tax strategies.

As of December 31, 2019, we had net deferred tax assets totaling $10.3 million. These deferred tax assets can only be realized if we generate taxable income in the future. We regularly evaluate the realizability of deferred tax asset positions. In determining whether a valuation allowance is necessary, we consider the level of taxable income in prior years to the extent that carrybacks are permitted under current tax laws, as well as estimates of future pre-tax and taxable income and tax planning strategies that would, if necessary, be implemented. We have provided a valuation allowance of $7.4 million as of December 31, 2019 on the deferred tax assets related to the Bank’s state net operating losses and temporary differences.

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Results of Operations for the Fiscal Year Ended December 31, 2018

For a comparison of the Company’s results of operations for the year ended December 31, 2018, please see the section captioned “Results of Operations for the Fiscal Year Ended December 31, 2018” in Item 7 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2019.

Average Balances and Yields

    The following tables present information regarding average balances of assets and liabilities, as well as the total dollar amounts of interest income and dividends from average interest-earning assets, and interest expense on average interest-bearing liabilities, and the resulting annualized average yields and costs. The yields and costs for the periods indicated are derived by dividing income or expense by the average daily balances of assets or liabilities, respectively, for the periods presented. Loan (fees) costs, including prepayment fees, are included in interest income on loans and are not material. Non-accrual loans and PCI loans are included in the average balances and are not material. Yields are not presented on a tax-equivalent basis. Any adjustments necessary to present yields on a tax-equivalent basis are insignificant.

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	Years Ended December 31,
	2020							2019
	Average Balance			Interest		Yield / Cost		Average Balance			Interest		Yield / Cost
	(Dollars in thousands)
Interest earning assets:
Loans (1)	$	6,413,559		$	255,236	3.98	%	$	5,222,953		$	217,774	4.17	%
Securities (2)	1,465,093			36,401		2.48	%	1,380,801			39,118		2.83	%
Other interest-earning assets	255,369			4,074		1.60	%	71,551			4,191		5.86	%
Total interest-earning assets	8,134,021			$	295,711	3.64	%	6,675,305			$	261,083	3.91	%
Non-interest-earning assets	610,952							411,549
Total assets	$	8,744,973						$	7,086,854
Interest-bearing liabilities:
Interest-bearing demand	$	1,945,075		$	12,666	0.65	%	$	1,420,667		$	17,621	1.24	%
Money market accounts	510,189			2,890		0.57	%	286,281			2,301		0.80	%
Savings and club deposits	623,964			1,023		0.16	%	495,261			770		0.16	%
Certificates of deposit	2,088,488			38,667		1.85	%	1,842,243			40,859		2.22	%
Total interest-bearing deposits	5,167,716			55,246		1.07	%	4,044,452			61,551		1.52	%
FHLB advances	1,122,633			18,145		1.62	%	1,133,280			26,983		2.38	%
Subordinated notes	11,067			448		4.05	%	2,881			113		3.92	%
Junior subordinated debentures	8,481			295		3.48	%	1,253			65		5.19	%
Other borrowings	1,913			4		0.21	%	—			—		—	%
Total borrowings	1,144,094			18,892		1.65	%	1,137,414			27,161		2.39	%
Total interest-bearing liabilities	6,311,810			$	74,138	1.17	%	5,181,866			$	88,712	1.71	%
Non-interest-bearing liabilities:
Non-interest-bearing deposits	1,215,352							776,850
Other non-interest-bearing liabilities	201,714							133,213
Total liabilities	7,728,876							6,091,929
Total stockholders' equity	1,016,097							994,925
Total liabilities and stockholders' equity	$	8,744,973						$	7,086,854
Net interest income				$	221,573						$	172,371
Interest rate spread (3)						2.47	%						2.20	%
Net interest-earning assets (4)	$	1,822,211						$	1,493,439
Net interest margin (5)						2.72	%						2.58	%
Ratio of interest-earning assets to interest-bearing liabilities	128.87		%					128.82		%
(1) Includes loans held-for-sale, non-accrual and PCI loan balances.
(2) Includes debt securities available for sale, debt securities held to maturity and equity securities.
(3) Net interest rate spread represents the difference between the yield on average interest-earning assets and the cost of average interest-bearing liabilities.
(4) Net interest-earning assets represent total interest-earning assets less total interest-bearing liabilities.
(5) Net interest margin represents net interest income divided by average total interest-earning assets.

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	Years Ended December 31,
	2018
	Average Balance			Interest		Yield / Cost
	(Dollars in thousands)
Interest earning assets:
Loans (1)	$	4,711,915		$	189,869	4.03	%
Securities (2)	1,171,617			32,485		2.77	%
Other interest-earning assets	111,218			3,936		3.54	%
Total interest-earning assets	5,994,750			$	226,290	3.77	%
Non-interest-earning assets	324,499
Total assets	$	6,319,249
Interest-bearing liabilities:
Interest-bearing demand	$	1,323,766		$	11,395	0.86	%
Money market accounts	299,389			1,538		0.51	%
Savings and club deposits	628,746			993		0.16	%
Certificates of deposit	1,514,843			25,597		1.69	%
Total interest-bearing deposits	3,766,744			39,523		1.05	%
FHLB advances	912,032			19,263		2.11	%
Junior subordinated debentures	31,422			3,467		11.03	%
Other borrowings	222			3		1.35	%
Total borrowings	943,676			22,733		2.41	%
Total interest-bearing liabilities	4,710,420			$	62,256	1.32	%
Non-interest-bearing liabilities:
Non-interest-bearing deposits	704,155
Other non-interest bearing liabilities	112,785
Total liabilities	5,527,360
Total stockholders' equity	791,889
Total liabilities and stockholders' equity	$	6,319,249
Net interest income				$	164,034
Interest rate spread (3)						2.45	%
Net interest-earning assets (4)	$	1,284,330
Net interest margin (5)						2.74	%
Ratio of interest-earning assets to interest-bearing liabilities	127.27		%
(1) Includes loans held-for-sale and non-accrual loan balances.
(2) Includes debt securities available for sale, debt securities held to maturity and equity securities.
(3) Net interest rate spread represents the difference between the yield on average interest-earning assets and the cost of average interest-bearing liabilities.
(4) Net interest-earning assets represent total interest-earning assets less total interest-bearing liabilities.
(5) Net interest margin represents net interest income divided by average total interest-earning assets.

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Rate/Volume Analysis

    The following table sets forth the effects of changing rates and volumes on our net interest income. The rate column shows the effects attributable to changes in rate (changes in rate multiplied by prior volume). The volume column shows the effects attributable to changes in volume (changes in volume multiplied by prior rate). The total column represents the sum of the prior columns.

	Year Ended 12/31/2020 Compared to Year Ended 12/31/2019								Year Ended 12/31/2019 Compared to Year Ended 12/31/2018
	Increase (Decrease) Due to								Increase (Decrease) Due to
	Volume			Rate			Total		Volume		Rate		Total
	(In thousands)
Interest income:
Loans	$	49,643		$	(12,181)		$	37,462	$	20,593	$	7,312	$	27,905
Securities	2,388			(5,105)			(2,717)		5,800		833		6,633
Other interest-earning assets	10,767			(10,884)			(117)		(1,404)		1,659		255
Total interest-earning assets	$	62,798		$	(28,170)		$	34,628	$	24,989	$	9,804	$	34,793
Interest expense:
Interest-bearing demand	6,504			(11,459)			(4,955)		$	834	$	5,392	$	6,226
Money market accounts	1,800			(1,211)			589		(67)		830		763
Savings and club accounts	200			53			253		(211)		(12)		(223)
Certificates of deposit	5,461			(7,653)			(2,192)		5,532		9,730		15,262
Total interest-bearing deposits	13,965			(20,270)			(6,305)		6,088		15,940		22,028
FHLB advances	(254)			(8,584)			(8,838)		4,673		3,047		7,720
Subordinated notes	321		—	14		—	335		—		113		113
Junior subordinated debentures	375			(145)			230		(3,329)		(73)		(3,402)
Other borrowings	—			4			4		(3)		—		(3)
Total interest-bearing liabilities	$	14,407		$	(28,981)		$	(14,574)	$	7,429	$	19,027	$	26,456
Net change in net interest income	$	48,391		$	811		$	49,202	$	17,560	$	(9,223)	$	8,337

Risk Management

Overview. Managing risk is an essential part of successfully managing a financial institution. Our most prominent risk exposures are credit risk, interest rate risk and market risk. Credit risk is the risk of not collecting the interest and/or the principal balance of a loan or investment when it is due. Interest rate risk is the potential reduction of interest income as a result of changes in interest rates. Market risk arises from fluctuations in interest rates that may result in changes in the values of financial instruments, such as available for sale securities that are accounted for at fair value. Other risks that we face are operational risk, liquidity risk and reputation risk. Operational risk includes risks related to fraud, regulatory compliance, processing errors, cyber-attacks, and disaster recovery. Liquidity risk is the possible inability to fund obligations to depositors, lenders or borrowers. Reputation risk is the risk that negative publicity or press, whether true or not, could cause a decline in our customer base or revenue.

We maintain a Risk Management Division comprised of our Risk Management, Compliance, Internal Loan Review, Appraisal and Security Departments. Our Risk Management Division is led by our Executive Vice President and Chief Risk Officer, who reports quarterly to Columbia Bank’s Risk Committee, which is comprised of the full board of directors. The current structure of our Risk Management Division is designed to monitor and address, among other things, financial, credit, collateral, consumer compliance, operational, Bank Secrecy Act, fraud, cyber security, vendor and insurable risks. The Risk Management Division utilizes a number of enterprise risk assessment tools, including stress testing, credit concentration reviews, peer analyses, industry considerations and individual risk assessments, to identify and report potential risks that we face in connection with our business operations.

Credit Risk Management. The objective of our credit risk management strategy is to quantify and manage credit risk and to limit the risk of loss resulting from an individual customer default. Our credit risk management strategy focuses on conservatism, diversification within the loan portfolio and monitoring. Our lending practices include conservative exposure limits and underwriting, documentation and collection standards. Our credit risk management strategy also emphasizes diversification on an industry and customer level as well as regular credit examinations and monthly management reviews of large credit exposures and loans

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experiencing deterioration in credit quality. Our credit risk review function provides objective assessments of the quality of underwriting and documentation, the accuracy of risk ratings and the charge-off, non-accrual and reserve analysis process. Our credit review process and overall assessment of required allowances is based on quarterly assessments of the probable estimated losses inherent in the loan portfolio. We use these assessments to identify potential problem loans within the portfolio, maintain an adequate reserve and take any necessary charge-offs.

When a borrower fails to make a required payment, we take a number of steps to have the borrower cure the delinquency and restore the loan to current status. Generally, our collection department follows the guidelines for servicing loans as prescribed by applicable law or the appropriate investor. Collection activities include, but are not limited to, phone calls to borrowers and collection letters, which include a late charge notice based on the contractual requirements of the specific loan. Additional calls and notices are mailed in compliance with state and federal regulations including, but not limited to, the Fair Debt Collection Practices Act. After the 90th day of delinquency for a residential mortgage or consumer loan, or on a different date as allowable by law or contract, the collection department will forward the account to counsel and begin the collection litigation which typically includes foreclosure proceedings. If a foreclosure action is instituted and the loan is not in at least the early stages of a workout by the scheduled sale date, the real property securing the loan generally is sold at a sheriff sale. If we determine that there is a possibility of a settlement, pay-off or reinstatement, the sheriff sale may be postponed.

We charge off the collateral or cash flow deficiency on all consumer loans once they become 180 days delinquent and all commercial loans once they become 90 days delinquent or earlier if management believes the collectability of the loan is unlikely. In addition to the individual review of larger commercial loans that exhibit probable or observed credit weaknesses, the commercial credit review process includes the use of an enhanced risk rating system. Historical portfolio performance metrics, current economic conditions and delinquency monitoring are factors used to assess the credit risk in our homogeneous commercial, residential and consumer loan portfolios.

Analysis of Non-Performing, Troubled Debt Restructurings and Classified Assets. We consider repossessed assets and loans to be non-performing assets if they are 90 days or more past due or earlier if management believes the collectability of the loan is unlikely. Generally, all loans are placed on non-accrual status when the payment of interest is 90days or more in arrears of its contractual due date, at which time the accrual of interest ceases. Typically, payments received on a non-accrual loan are applied to the outstanding principal balance of the loan.

Real estate that we acquire through foreclosure or by deed in lieu of foreclosure is classified as real estate owned until it is sold. When an asset is acquired, the excess of the loan balance over fair value less estimated selling costs is charged to the allowance for loan losses. Operating results from real estate owned, including rental income, operating expenses, and gains and losses realized from the sales of real estate owned are recorded as incurred.

We consider a loan a troubled debt restructuring, or “TDR,” when the borrower is experiencing financial difficulty and we grant a concession that we would not otherwise consider but for the borrower’s financial difficulties. A TDR includes a modification of debt terms or assets received in satisfaction of the debt (which may include foreclosure or deed in lieu of foreclosure) or a combination of the foregoing. We evaluate selective criteria to determine if a borrower is experiencing financial difficulty including the ability of the borrower to obtain funds from third party sources at market rates. We consider all TDRs to be impaired loans even if they are performing. We will not consider the loan a TDR if the loan modification was made for customer retention purposes and the modification is consistent with prevailing market conditions.

Once a loan has been classified as a TDR and has been put on non-accrual status, it may be returned to accrual status when there has been a sustained period of repayment performance (generally six consecutive months of payments) and both principal and interest are deemed collectible. Our policy for returning a loan to accrual status requires the preparation of a well-documented credit evaluation, which includes the following:

•A review of the borrower’s current financial condition in which the borrower must demonstrate sufficient cash flow to support the repayment of all principal and interest including any amounts previously charged-off;

•An updated appraisal or home valuation, which must demonstrate sufficient collateral value to support the debt;

•Sustained performance based on the restructured terms for at least six consecutive months; and

•Approval by the Asset Classification Committee, which consists of senior management including the Chief Credit Officer and the Chief Accounting Officer.

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Section 4013 of the CARES Act, “Temporary Relief from Troubled Debt Restructurings,” allows banks to temporarily suspend certain requirements under GAAP related to TDRs for a limited period of time to account for the effects of COVID-19. The Bank elected to account for modifications on certain loans under Section 4013 of the CARES Act or, if the loan modification was not eligible under Section 4013, used the criteria in the COVID-19 guidance to determine when the loan modification was not a TDR in accordance with ASC 310-40. Guidance noted that modification or deferral programs mandated by the federal or a state government related to COVID-19 would not be in the scope of ASC 310-40, such as a state program that requires all institutions within that state to suspend mortgage payments for a specified period. These short-term loan modifications will not be treated as troubled debt restructurings during the short-term modification period if the loan was not in arrears at December 31, 2019. Furthermore, based on current evaluations, generally, we have continued the accrual of interest on these loans during the short-term modification period. The Consolidated Appropriations Act, 2021, which was enacted in late December 2020, extended certain provisions of the CARES Act, including provisions permitting loan deferral extension requests to not be treated as troubled debt restructurings.

We had two TDRs totaling $726,000 on non-accrual status at December 31, 2020, as compared to no TDRs on non-accrual status at December 31, 2019, and one TDR totaling $102,000 on non-accrual status at December 31, 2018. We had 70 TDRs totaling $44.7 million and 75 TDRs totaling $20.0 million that were on accrual status and in compliance with their modified terms as of December 31, 2020 and 2019, respectively.

    The following table sets forth information with respect to our non-performing assets at the dates indicated, excluding PCI loans. We did not have any accruing loans past due 90 days or more at any of the dates indicated.

	At December 31,												At September 30,
	2020			2019			2018			2017			2017			2016
	(Dollars in thousands)
Non-accrual loans:
Real estate loans:
One-to-four family	$	2,637		$	1,732		$	819		$	3,360		$	3,496		$	4,688
Multifamily and commercial	1,873			716			154			1,329			1,510			4,257
Total real estate loans	4,510			2,448			973			4,689			5,006			8,945
Commercial business loans	2,968			3,686			911			1,263			1,038			1,608
Consumer loans:
Home equity loans and advances	678			553			905			573			351			1,667
Total non-accrual loans (1)	8,156			6,687			2,789			6,525			6,395			12,220
Total non-performing loans	8,156			6,687			2,789			6,525			6,395			12,220
Real estate owned	—			—			92			959			393			1,260
Total non-performing assets	$	8,156		$	6,687		$	2,881		$	7,484		$	6,788		$	13,480
Total non-performing loans to total loans	0.13		%	0.11		%	0.06		%	0.15		%	0.15		%	0.31		%
Total non-performing assets total assets	0.09		%	0.08		%	0.04		%	0.13		%	0.13		%	0.27		%
(1) Includes $91,000, $0, $102,000, $425,000, $1.0 million and $1.0 million, of TDRs on non-accrual status as of December 31, 2020, 2019, 2018 and 2017 and as of September 30, 2017 and 2016, respectively.

    Non-performing assets increased $1.5 million to $8.2 million, or 0.09% of total assets, at December 31, 2020 from $6.7 million, or 0.08% of total assets, at December 31, 2019. The $1.5 million increase in non-performing loans was primarily attributable to increases of $904,000 in non-performing one-to-four family real estate loans and $1.2 million in non-performing multifamily and commercial real estate loans, partially offset by a $718,000 decrease in non-performing commercial business loans. The increase in non-performing one-to-four family real estate loans was due to an increase in the number of loans from 10 non-performing loans at December 31, 2019 to 13 non-performing loans at December 31, 2020. The increase in non-performing multifamily and commercial real estate loans was due to two higher balance loans included at December 31, 2020, despite a decrease in the number of loans from eight non-performing loans at December 31, 2019 to four non-performing loans at December 31, 2020. We charge-off the collateral or

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cash flow deficiency on all loans meeting our definition of an impaired loan, which we define as a loan for which it is probable, based on current information, that we will not collect all amounts due under the contractual terms of the loan agreement. We consider the population of loans in our impairment analysis to include all multifamily and commercial real estate, construction, and commercial business loans with outstanding balances greater than $500,000 and not accruing, loans modified in a troubled debt restructuring, and other loans if management has specific information of a collateral shortfall. We continue to rigorously review our loan portfolio to ensure that the collateral values remain sufficient to support the outstanding balances.

Non-performing assets increased $3.8 million to $6.7 million, or 0.08% of total assets, at December 31, 2019 from $2.9 million, or 0.04% of total assets, at December 31, 2018. The increase in non-performing one-to-four family real estate loans was due to an increase in the number of loans from six non-performing loans at December 31, 2018 to 12 non-performing loans at December 31, 2019, while the increase in the balance of non-performing commercial business loans was due to an increase in the number of loans from three non-performing loans at December 31, 2018 to 11 non-performing loans at December 31, 2019. Net charge-offs for the year ended December 31, 2019 were $4.9 million compared to $2.5 million for the year ended December 31, 2018.

Federal regulations require us to review and classify our assets on a regular basis. In addition, our banking regulators have the authority to identify problem assets and, if appropriate, require them to be classified. Our credit review process includes a risk classification of all commercial and residential loans that includes four levels of pass, special mention, substandard, doubtful and loss. A loan is classified as pass when payments are current and it is performing under the original contractual terms. A loan is classified as special mention when the borrower exhibits potential credit weakness or a downward trend which, if not checked or corrected, will weaken the asset or inadequately protect our position. While potentially weak, the borrower is currently marginally acceptable; no loss of principal or interest is envisioned. A loan is classified as substandard when the borrower has a well-defined weakness or weaknesses that jeopardize the orderly liquidation of the debt. A substandard loan is inadequately protected by the current net worth and paying capacity of the obligor, normal repayment from this borrower is in jeopardy, and there is a distinct possibility that a partial loss of interest and/or principal will occur if the deficiencies are not corrected. A loan is classified as doubtful when a borrower has all weaknesses inherent in a substandard loan with the added provision that: (1) the weaknesses make collection of debt in full on the basis of currently existing facts, conditions and values highly questionable and improbable; (2) serious problems exist to the point where a partial loss of principal is likely; and (3) the possibility of loss is extremely high, but because of certain important, reasonably specific pending factors that may work to the advantage and strengthening of the assets, its classification as an estimated loss is deferred until its more exact status may be determined. Pending factors include proposed merger, acquisition, or liquidation procedures, capital injection, perfecting liens and additional refinancing plans. A loan is classified as loss when all or a portion of the loan is considered uncollectible and of such little value that its continuance on our books without establishment of a specific valuation allowance or charge off is not warranted. This classification does not necessarily mean that the loan has no recovery or salvage value. Rather, it indicates that there is significant doubt about whether, how much or when recovery will occur.

A loan is considered delinquent when we have not received a payment within 30 days of its contractual due date. Generally, a loan is designated as a non-accrual loan when the payment of interest is 90 days or more in arrears of its contractual due date. At December 31, 2020, there were no loans past due 90 days or more still accruing interest other than COVID-19 related loan forbearance and deferrals. In accordance with the CARES Act, these loans are not included in the aging of loans receivable by portfolio segment in the table below, and the Bank continues to accrue interest income during the forbearance or deferral period. If adverse information indicating that the borrower's capability of repaying all amounts due is unlikely, the interest accrual will cease. The following tables summarize the aging of loans receivable by portfolio segment at the dates indicated:

	At December 31,
	2020						2019						2018
	30-59 Days		60-89 Days		90 Days or More		30-59 Days		60-89 Days		90 Days or More		30-59 Days		60-89 Days		90 Days or More
	(In thousands)
Real estate loans:
One-to-four family	$	3,068	$	912	$	1,901	$	6,249	$	2,132	$	1,638	$	8,384	$	1,518	$	819
Multifamily and commercial	15,645		—		1,238		626		1,210		716		1,870		1,425		154
Construction	550		—		—		—		—		—		—		—		—
Commercial business loans	2,343		1,056		2,453		1,056		—		2,489		208		279		911
Consumer loans:
Home equity loans and advances	1,156		696		394		1,708		246		405		1,550		173		905
Other consumer loans	4		—		—		3		—		—		—		—		—
Total	$	22,766	$	2,664	$	5,986	$	9,642	$	3,588	$	5,248	$	12,012	$	3,395	$	2,789

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	At December 31						At September 30,
	2017						2017						2016
	30-59 Days		60-89 Days		90 Days or More		30-59 Days		60-89 Days		90 Days or More		30-59 Days		60-89 Days		90 Days or More
	(In thousands)
Real estate loans:
One-to four-family	$	7,080	$	1,229	$	3,360	$	3,924	$	932	$	3,496	$	9,401	$	1,338	$	4,538
Commercial and multifamily	138		380		1,329		—		123		1,510		1,030		275		4,257
Commercial business loans	89		730		1,263		—		388		1,038		60		—		1,608
Consumer loans:
Home equity loans and advances	1,421		26		573		1,437		187		351		2,855		436		1,667
Other consumer loans	—		—		—		1		—		—		1		—		—
Total	$	8,728	$	2,365	$	6,525	$	5,362	$	1,630	$	6,395	$	13,347	$	2,049	$	12,070

    The following tables present classified and criticized assets by credit risk indicator at the dates indicated:

	At December 31,								At September 30,
	2020		2019		2018		2017		2017		2016
	(In thousands)
Classified loans:
Substandard	$	30,786	$	28,495	$	23,345	$	31,836	$	30,935	$	44,885
Doubtful	—		—		—		—		—		—
Total classified loans	30,786		28,495		23,345		31,836		30,935		44,885
Special mention	47,514		25,313		9,074		8,460		14,947		11,509
Total criticized loans	$	78,300	$	53,808	$	32,419	$	40,296	$	45,882	$	56,394

    All impaired loans classified as substandard and doubtful are written down to the fair value of their underlying collateral if the loan is collateral dependent.

    Analysis and Determination of the Allowance for Loan Losses

    The allowance for loan losses is a valuation account that reflects management's evaluation of probable losses in the loan portfolio. We evaluate the need to establish allowances against losses on loans on a quarterly basis. When additional allowances are necessary, a provision for loan losses is charged to earnings. Our methodology for assessing the appropriateness of the allowance for loan losses consists of: (1) a specific valuation allowance for loans individually evaluated for impairment and (2) a general valuation allowance for loans collectively evaluated for impairment.

    Specific Allowance (Individually Evaluated for Impairment). Management regularly monitors the condition of borrowers and assesses both internal and external factors in determining whether any relationships have deteriorated, considering factors such as historical loss experience, trends in delinquency and non-performing loans, changes in risk composition and underwriting standards, the experience and ability of staff and regional and national economic conditions and trends.

Our loan officers and loan servicing staff identify and manage potential problem loans within our commercial loan portfolio. Non-performing assets within the commercial loan portfolio are transferred to the Special Assets Department for workout or litigation. The Special Assets Department reports directly to the Chief Credit Officer. Changes in management, financial or operating performance, company behavior, industry factors and external events and circumstances are evaluated on an ongoing basis to determine whether potential impairment is evident and additional analysis is needed. For our commercial loan portfolio, risk ratings are assigned to each individual loan to differentiate risk within the portfolio and are reviewed on an ongoing basis by credit management and the Internal Loan Review Department and revised, if needed, to reflect the borrower’s current risk profiles and the related collateral positions.

The risk ratings consider factors such as financial condition, debt capacity and coverage ratios, market presence and quality of management. When a credit’s risk rating is downgraded to a certain level, the relationship must be reviewed and detailed reports

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completed that document risk management strategies for the credit going forward, and the appropriate accounting actions to take in accordance with generally accepted accounting principles in the United States. When credits are downgraded beyond a certain level, our Special Assets and Loan Servicing Departments become responsible for managing the credit risk.

The Asset Classification Committee reviews risk rating actions (specifically downgrades or upgrades between pass and the criticized and classified categories) recommended by Lending, Loan Servicing, Commercial Credit, Internal Loan Review and/or Special Assets Departments on a quarterly basis. Our Commercial Credit, Internal Loan Review, Lending, and Loan Servicing Departments monitor our commercial, residential and consumer loan portfolios for credit risk and deterioration considering factors such as delinquency, loan to value ratios and credit scores.

When problem loans are identified that are secured with collateral, management examines the loan files to evaluate the nature and type of collateral supporting the loans. Management documents the collateral type, date of the most recent valuation, and whether any liens exist, to determine the value to compare against the committed loan amount. If a loan is identified as impaired and is collateral dependent, an updated appraisal is obtained to provide a baseline in determining the property’s fair value. A collateral dependent impaired loan is written down to its appraised value and a specific allowance is established to cover potential selling costs. If the collateral value is subject to significant volatility (due to location of asset, obsolescence, etc.) an appraisal is obtained more frequently. In-house revaluations are typically performed on a quarterly basis and updated appraisals are obtained annually, if determined necessary.

When we determine that the value of an impaired loan is less than its carrying amount, we recognize impairment through a charge-off to the allowance. We perform these assessments on at least a quarterly basis. For commercial loans, a charge-off is recorded when management determines we will not collect 100% of a loan based on the fair value of the collateral or the net present value of expected future cash flows. The collateral deficiency on consumer loans and residential loans are generally charged-off when deemed to be uncollectible or delinquent 180 days, whichever comes first, unless it can be clearly demonstrated that repayment will occur regardless of the delinquency status. Examples that would demonstrate repayment include a loan that is secured by adequate collateral and is in the process of collection, a loan supported by a valid guarantee or insurance, or a loan supported by a valid claim against a solvent estate.

    General Allowance (Collectively Evaluated for Impairment). Additionally, we reserve for certain inherent, but undetected, losses that are probable within the loan portfolio. This is due to several factors, such as, but not limited to, inherent delays in obtaining information regarding a customer’s financial condition or changes in their unique business conditions and the interpretation of economic trends. While this analysis is conducted at least quarterly, we have the ability to revise the allowance factors whenever necessary to address improving or deteriorating credit quality trends or specific risks associated with a given loan pool classification.

A comprehensive analysis of the allowance for loan losses is performed on a quarterly basis. The entire allowance for loan losses is available to absorb losses in the loan portfolio irrespective of the amount of each separate element of the allowance. Our principal focus, therefore, is on the adequacy of the total allowance for loan losses.

The allowance for loan losses is maintained at levels that management considers appropriate to provide for losses based upon an evaluation of known and inherent risks in the loan portfolio. Management’s evaluation takes into consideration the risks inherent in the loan portfolio, past loan loss experience, specific loans with loss potential, geographic and industry concentrations, delinquency trends, economic conditions, the level of originations and other relevant factors. While management uses the best information available to make such evaluations, future adjustments to the allowance for credit losses may be necessary if conditions differ substantially from the assumptions used in making the evaluations. In addition, because future events affecting borrowers and collateral cannot be predicted with certainty, the existing allowance for loan losses may not be sufficient should the quality of loans deteriorate as a result of the factors described above. Any material increase in the allowance for loan losses may adversely affect our financial condition and results of operations. The allowance for loan losses is subject to review by our banking regulators. On an annual basis our primary bank regulator conducts an examination of the allowance for loan losses and makes an assessment regarding its adequacy and the methodology employed in its determination. Our regulators may require the allowance for loan losses to be increased based on their review of information available to them at the time of their examination.

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	At December 31,
	2020						2019						2018
	Amount		% of Allowance to Total Allowance		% of Allowance to Loans in Category		Amount		% of Allowance to Total Allowance		% of Allowance to Loans in Category		Amount		% of Allowance to Total Allowance		% of Allowance to Loans in Category
	(Dollars in thousands)
Real estate loans:
One-to-four family	$	13,586	18.2	%	0.7	%	$	13,780	22.4	%	0.7	%	$	15,232	24.5	%	0.8	%
Multifamily and commercial	30,681		41.1		1.1		22,980		37.2		0.8		23,251		37.3		1.1
Construction	11,271		15.1		3.4		7,435		12.0		2.5		7,217		11.6		2.8
Commercial business	17,384		23.3		2.3		15,836		25.7		3.3		14,176		22.7		4.2
Consumer loans:
Home equity loans and advances	1,748		2.3		0.5		1,669		2.7		0.4		2,458		3.9		0.6
Other consumer loans	6		—		0.4		9		—		0.5		8		—		0.7
Total allowance for loan losses	$	74,676	100.0	%	1.2	%	$	61,709	100.0	%	1.0	%	$	62,342	100.0	%	1.3	%

	At December 31,						At September 30,
	2017						2017						2016
	Amount		% of Allowance to Total Allowance		% of Allowance to Loans in Category		Amount		% of Allowance to Total Allowance		% of Allowance to Loans in Category		Amount		% of Allowance to Total Allowance		% of Allowance to Loans in Category
	(Dollars in thousands)
Real estate loans:
One-to-four family	$	19,991	34.4	%	1.2	%	$	18,533	33.9	%	1.2	%	$	18,638	35.9	%	1.2	%
Multifamily and commercial	19,933		34.2		1.1		18,029		33.0		1.0		17,390		33.5		1.1
Construction	5,217		9.0		2.2		5,299		9.7		2.4		5,960		11.5		3.2
Commercial business loans	8,275		14.2		3.0		8,480		15.5		3.2		5,721		11.0		3.2
Consumer loans:
Home equity loans and advances	4,576		7.9		1.0		4,190		7.7		0.9		4,052		7.8		0.8
Other consumer loans	8		—		0.8		8		—		0.6		11		—		0.8
Total allocated allowance	$	58,000	99.7	%	1.3	%	$	54,539	99.8	%	1.3	%	$	51,772	99.8	%	1.3	%
Unallocated	178		0.3		—	%	94		0.2		—	%	95		0.2		—	%
Total allowance for loan losses	$	58,178	100.0	%	1.3	%	$	54,633	100.0	%	1.3	%	$	51,867	100.0	%	1.3	%

    Total Loans. During the year ended December 31, 2020, the balance of the allowance for loan losses increased by $13.0 million to $74.7 million, or 1.21% of total loans at December 31, 2020, from $61.7 million or 1.00% of total loans at December 31, 2019. The noted increase in the total loan coverage ratio for the year ended December 31, 2020 was primarily attributable to

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consideration of the deterioration of economic factors and loan performance due to the ongoing COVID-19 pandemic which resulted in increases to qualitative factors, and to a lesser extent, due to an increase in charge-offs for the year.

    One-to-Four Family Loan Portfolio. The allowance for the one-to-four family loan portfolio was $13.6 million, or 0.7% of one-to-four family loans at December 31, 2020, compared to $13.8 million, or 0.7% of one-to-four family loans at December 31, 2019. Our one-to-four family non-accrual loans increased $905,000, or 52.3% to $2.6 million at December 31, 2020 from $1.7 million at December 31, 2019, and net charge-offs were $1.5 million for the year ended December 31, 2020 compared to $1.0 million for the year ended December 31, 2019. We believe the balance of one-to-four family loan reserve ratio is appropriate given the continued low charge-off levels and the decrease in the portfolio balance year over year.

Multifamily and Commercial Real Estate Loan Portfolio. The allowance for loan losses related to the multifamily and commercial real estate loan portfolio totaled $30.7 million, or 1.1%, of multifamily and commercial real estate loans at December 31, 2020, as compared to $23.0 million, or 0.8% of multifamily and commercial real estate loans at December 31, 2019. We experienced a $39.4 million increase in criticized and classified loans to $59.1 million at December 31, 2020 compared to $19.7 million at December 31, 2019. Multifamily and commercial real estate non-accrual loans increased to $1.9 million at December 31, 2020 from $716,000 at December 31, 2019. Net charge-offs were $12,000 for the year ended December 31, 2020 as compared to $93,000 for the year ended December 31, 2019. We believe the multifamily and commercial real estate loan reserve ratio is appropriate given the increases in criticized and classified and non-accrual loans, partially mitigated by the continued low charge-off levels and the decrease in the portfolio balance year over year.

Construction Loan Portfolio.  The portion of the allowance for loan losses related to the construction portfolio totaled $11.3 million, or 3.4% of construction loans at December 31, 2020, as compared to $7.4 million, or 2.5% at December 31, 2019. At both December 31, 2020 and 2019, we had no classified or criticized construction loans. At December 31, 2020 and 2019, we had no construction loans that were in a non-accrual status and we recorded recoveries of $1,000 and $2,000, respectively, during the years ended December 31, 2020 and 2019. We believe the construction loan reserve ratio was appropriate due to the increase in the balance of these loans along with the inherent credit risk associated with this portfolio.

Commercial Business Loan Portfolio. The portion of the allowance for loan losses related to the commercial business loan portfolio totaled $17.4 million, or 2.3% of commercial business loans at December 31, 2020, which decreased from $15.8 million, or 3.3% of commercial business loans at December 31, 2019. At December 31, 2020, $344.4 million in PPP loans included in the commercial business loan portfolio do not require an allowance as they are 100% guaranteed by the SBA. We experienced a $209,000 increase in criticized and classified commercial business loans to $1.1 million at December 31, 2020 as compared to $876,000 at December 31, 2019. Commercial business loan non-accrual loans decreased $718,000 to $3.0 million at December 31, 2020 from $3.7 million at December 31, 2019. Net charge-offs were $3.8 million for the year ended December 31, 2020 compared to $3.6 million for the year ended December 31, 2019. We continue to charge-off any cash flow or collateral deficiency for non-performing loans once a loan is 90 days past due. We believe the reserve ratio was appropriate given the inherent credit risk of commercial business loans.

Home Equity Loans and Advances. The allowance for the home equity loan portfolio decreased to $1.7 million, or 0.5% of consumer loans, at December 31, 2020 compared to $1.7 million, or 0.4% of consumer loans, at December 31, 2019. Home equity non-accrual loans increased $125,000 to $678,000 at December 31, 2020, from $553,000 at December 31, 2019. Net charge-offs were $160,000 for the year ending December 31, 2020 compared to $151,000 for the year ending December 31, 2019. We believe the decrease in the consumer reserve was appropriate based upon the decrease in the balance year over year and the insignificant amount of delinquencies, non-accrual loans and charge-offs.

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    The following table sets forth an analysis of the activity in the allowance for loan losses for the periods indicated:

	At or For the Years Ended December 31,												At or For the Years Ended September 30,
	2020			2019			2018			2017			2017			2016
	(Dollars in thousands)
Allowance at beginning of period	$	61,709		$	62,342		$	58,178		$	51,849		$	51,867		$	56,948
Provision for loan losses	18,447			4,224			6,677			9,826			6,426			417
Charge-offs:
Real estate loans:
One-to-four family	(1,931)			(1,053)			(590)			(1,412)			(1,402)			(3,496)
Multifamily and commercial	(28)			(103)			(129)			(1,082)			(1,080)			(879)
Construction	—			—			—			—			—			(321)
Total real estate loans	(1,959)			(1,156)			(719)			(2,494)			(2,482)			(4,696)
Commercial business loans	(4,120)			(3,994)			(2,199)			(586)			(606)			(458)
Consumer loans:
Home equity loans and advances	(220)			(201)			(291)			(1,144)			(1,140)			(1,053)
Other consumer loans	(4)			(2)			(11)			(19)			(16)			(12)
Total consumer loans	(224)			(203)			(302)			(1,163)			(1,156)			(1,065)
Total charge-offs	(6,303)			(5,353)			(3,220)			(4,243)			(4,244)			(6,219)
Recoveries:
Real estate loans:
One-to-four family	438			30			334			274			268			158
Multifamily and commercial	16			10			2			75			75			23
Construction	1			2			3			—			—			76
Total real estate loans	455			42			339			349			343			257
Commercial business loans	308			404			240			336			182			408
Consumer loans:
Home equity loans and advances	60			50			122			59			59			55
Other consumer loans	—			—			6			2			—			1
Total consumer loans	60			50			128			61			59			56
Total recoveries	823			496			707			746			584			721
Net charge-offs	(5,480)			(4,857)			(2,513)			(3,497)			(3,660)			(5,498)
Allowance at end of period:	$	74,676		$	61,709		$	62,342		$	58,178		$	54,633		$	51,867
Total loans outstanding	$	6,162,547		$	6,169,308		$	4,962,289		$	4,446,015		$	4,353,121		$	3,977,634
Average gross loans outstanding	$	6,413,559		$	5,222,953		$	4,711,915		$	4,312,887		$	4,236,825		$	3,888,992
Allowance for loan losses to total non-performing loans	915.60		%	922.82		%	2,235.28		%	891.62		%	854.31		%	424.44		%
Allowance for loan losses to total gross loans at end of period	1.21		%	1.00		%	1.26		%	1.31		%	1.26		%	1.30		%
Net charge-offs to average outstanding loans	0.09		%	0.09		%	0.05		%	0.08		%	0.09		%	0.14		%

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COVID-19

To assist customers impacted by the COVID-19 pandemic, through January 31, 2021, the Company granted commercial loan modification requests with respect to multifamily, commercial, and construction real estate loans, with current balances of $734.7 million and granted consumer-related loan modification requests with respect to one-to-four family real estate loans and home equity loans and advances with current balances of $178.1 million. These short-term loan modifications are being treated in accordance with Section 4013 of the CARES Act and will not be treated as troubled debt restructurings during the short-term modification period if the loan was not in arrears at December 31, 2019. Furthermore, based on current evaluations, generally, we have continued the accrual of interest on these loans during the short-term modification period. The Consolidated Appropriations Act, 2021, which was enacted in late December 2020, extended certain provisions of the CARES Act, including provisions permitting loan deferral extension requests to not be treated as troubled debt restructurings. Commercial loan modification requests include various industries and property types. The following table is a summary of loan modifications that have not begun to remit full payment:

	Balance at December 31, 2020		Percent of Total Loans at December 31, 2020		Balance at January 31, 2021		Percent of Total Loans at January 31, 2021
			(Dollars in thousands)
Real estate loans:
One-to-four family	$	6,770	0.35	%	$	6,679	0.35	%
Multifamily and commercial	71,348		2.53		54,418		1.93
Construction	3,312		1.01		3,337		1.03
Commercial business loans	3,397		0.45		3,395		0.44
Consumer loans:
Home equity loans and advances	314		0.10		47		0.02
Total loans	$	85,141	1.38	%	$	67,876	1.10	%

At January 31, 2021, $55.8 million of the commercial loans in the above table are remitting partial payments and $59.6 million were granted an additional deferral period, of which $54.3 million are remitting payments.

Through January 31, 2021, the Company originated 2,826 loans for $559.5 million under the SBA Paycheck Protection Program. Through January 31, 2021 forgiveness with respect to 1,187 of such loans, with aggregate loan amounts of $184.2 million, have been received.

Interest Rate Risk Management

Interest rate risk is defined as the exposure of a Company's current and future earnings and capital arising from movements in market interest rates. Depending on a bank’s asset/liability structure, adverse movements in interest rates could be either rising or falling interest rates. For example, a bank with predominantly long-term fixed-rate assets and short-term liabilities could have an adverse earnings exposure to a rising rate environment. Conversely, a short-term or variable-rate asset base funded by longer-term liabilities could be negatively affected by falling rates. This is referred to as re-pricing or maturity mismatch risk.

Interest rate risk also arises from changes in the slope of the yield curve (yield curve risk), from imperfect correlations in the adjustment of rates earned and paid on different instruments with otherwise similar re-pricing characteristics (basis risk), and from interest rate related options embedded in our assets and liabilities (option risk).

Our objective is to manage our interest rate risk by determining whether a given movement in interest rates affects our net interest income and the market value of our portfolio equity in a positive or negative way and to execute strategies to maintain interest rate risk within established limits. The results at December 31, 2020 indicate a level of risk within the parameters of our model. Our management believes that the December 31, 2020 results indicate a profile that reflects an acceptable level of interest rate risk exposures in both rising and declining rate environments for both net interest income and economic value.

Model Simulation Analysis. We view interest rate risk from two different perspectives. The traditional accounting perspective, which defines and measures interest rate risk as the change in net interest income and earnings caused by a change in interest rates, provides the best view of short-term interest rate risk exposure. We also view interest rate risk from an economic perspective, which defines and measures interest rate risk as the change in the market value of portfolio equity caused by changes in the values of assets and liabilities, which fluctuate due to changes in interest rates. The market value of portfolio equity, also referred to as the economic value of equity, is defined as the present value of future cash flows from existing assets, minus the present value of future cash flows from existing liabilities.

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These two perspectives give rise to income simulation and economic value simulation, each of which presents a unique picture of our risk of any movement in interest rates. Income simulation identifies the timing and magnitude of changes in income resulting from changes in prevailing interest rates over a short-term time horizon (usually one or two years). Economic value simulation reflects the interest rate sensitivity of assets and liabilities in a more comprehensive fashion, reflecting all future time periods. It can identify the quantity of interest rate risk as a function of the changes in the economic values of assets and liabilities, and the corresponding change in the economic value of equity of Columbia Bank. Both types of simulation assist in identifying, measuring, monitoring and managing interest rate risk and are employed by management to ensure that variations in interest rate risk exposure will be maintained within policy guidelines.

We produce these simulation reports and review them with our management, Asset/Liability Committee and Board Risk Committee on at least a quarterly basis. The simulation reports compare baseline (no interest rate change) to the results of an interest rate shock, to illustrate the specific impact of the interest rate scenario tested on income and equity. The model, which incorporates all asset and liability rate information, simulates the effect of various interest rate movements on income and equity value. The reports identify and measure our interest rate risk exposure present in our current asset/liability structure. Management considers both a static (current position) and dynamic (forecast changes in volume) analysis as well as non-parallel and gradual changes in interest rates and the yield curve in assessing interest rate exposures.

If the results produce quantifiable interest rate risk exposure beyond our limits, then the testing will have served as a monitoring mechanism to allow us to initiate asset/liability strategies designed to reduce and therefore mitigate interest rate risk.

The table below sets forth an approximation of our interest rate risk exposure. The simulation uses projected repricing of assets and liabilities at December 31, 2020. Net interest income assumes that the composition of interest sensitive assets and liabilities existing at the beginning of a period remains constant over the period being measured and also assumes that a particular change in interest rates is reflected uniformly across the yield curve regardless of the duration to maturity or repricing of specific assets and liabilities. Accordingly, although the net interest income table provides an indication of our interest rate risk exposure at a particular point in time, such measurement is not intended to and does not provide a precise forecast of the effect of changes in market interest rates on our net interest income and will differ from actual.

Certain shortcomings are also inherent in the methodologies used in the interest rate risk measurements. Modeling changes in net interest income requires the use of certain assumptions regarding prepayment and deposit repricing, which may or may not reflect the manner in which actual yields and costs respond to changes in market interest rates. While management believes such assumptions are reasonable, there can be no assurance that assumed prepayment rates and repricing rates will approximate actual future asset prepayment and liability repricing activity.

    The table below sets forth, as of December 31, 2020, Columbia Bank’s net portfolio value, the estimated changes in our net portfolio value, and the net interest income that would result from the designated instantaneous parallel changes in market interest rates. This data is for Columbia Bank and its subsidiaries only and does not include any assets of Columbia Financial, Inc.

	Twelve Months Net Interest Income						Net Portfolio Value ("NPV")
Change in Interest Rates (Basis Points)	Amount		Dollar Change		Percent of Change		Estimated NPV		Present Value Ratio		Percent Change
	(Dollars in thousands)
+300	$	226,213	$	14,517	6.86	%	$	957,602	11.68	%	(7.10)	%
+200	221,444		9,748		4.60		1,006,147		11.92		(2.39)
+100	216,381		4,685		2.21		1,029,939		11.86		(0.08)
Base	211,696		—		—		1,030,755		11.54		—
-100	197,089		(14,607)		(6.90)		938,002		10.26		(9.00)

    As of December 31, 2020, based on the scenarios above, net interest income would increase by approximately 4.60% if rates were to rise 200 basis points, and would decrease by 6.90% if rates were to decrease 100 basis points over a one-year time horizon.

Another measure of interest rate sensitivity is to model changes in the net portfolio value through the use of immediate and sustained interest rate shocks. As of December 31, 2020, based on the scenarios above, in the event of an immediate and sustained 200 basis point increase in interest rates, the NPV is projected to decrease 2.39%. If rates were to decrease 100 basis points, the model forecasts a 9.00% decrease in the NPV.

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Overall, our December 31, 2020 results indicate that we are adequately positioned with an acceptable net interest income and economic value at risk in all scenarios and that all interest rate risk results continue to be within our policy guidelines.

Liquidity Management

Liquidity risk is the risk of being unable to meet future financial obligations as they come due at a reasonable funding cost. We mitigate this risk by attempting to structure our balance sheet prudently and by maintaining diverse borrowing resources to fund potential cash needs. For example, we structure our balance sheet so that we fund less liquid assets, such as loans, with stable funding sources, such as retail deposits, long-term debt, wholesale borrowings, and capital. We assess liquidity needs arising from asset growth, maturing obligations, and deposit withdrawals, taking into account operations in both the normal course of business and times of unusual events. In addition, we consider our off-balance sheet arrangements and commitments that may impact liquidity in certain business environments.

Our Asset/Liability Committee measures liquidity risks, sets policies to manage these risks, and reviews adherence to those policies at its quarterly meetings. For example, we manage the use of short-term unsecured borrowings as well as total wholesale funding through policies established and reviewed by our Asset/Liability Committee. In addition, the Risk Committee of our Board of Directors reviews liquidity limits and reviews current and forecasted liquidity positions at each of its regularly scheduled meetings.

We have contingency funding plans that assess liquidity needs that may arise from certain stress events such as rapid asset growth or financial market disruptions. Our contingency plans also provide for continuous monitoring of net borrowed funds and dependence and available sources of contingent liquidity. These sources of contingent liquidity include cash and cash equivalents, capacity to borrow at the Federal Reserve discount window and through the FHLB system, fed funds purchased from other banks and the ability to sell, pledge or borrow against unencumbered securities in our securities portfolio. As of December 31, 2020, the potential liquidity from these sources is an amount we believe currently exceeds any contingent liquidity need.

Uses of Funds. Our primary uses of funds include the extension of loans and credit, the purchase of securities, working capital, and debt and capital management. In addition, contingent uses of funds may arise from events such as financial market disruptions.

We regularly adjust our investments in liquid assets based upon our assessment of: (1) expected loan demand, (2) expected deposit flows, (3) yields available on interest-earning deposits and securities, (4) repayment of borrowings, and (5) the objectives of our asset/liability management program. Excess liquid assets are generally invested in fed funds.

Sources of Funds. Our most liquid assets are cash and cash equivalents. The levels of these assets are dependent on our operating, investing and financing activities during any given period. At December 31, 2020, total cash and cash equivalents totaled $423.0 million. Debt securities classified as available for sale, and equity securities, which provide additional sources of liquidity, totaled $1.3 billion, and $5.4 million, respectively, at December 31, 2020. At December 31, 2020, we had $792.4 million in Federal Home Loan Bank fixed rate advances. In addition, if Columbia Bank requires funds beyond its ability to generate them internally, it can borrow additional funds under an overnight advance program up to Columbia Bank’s maximum borrowing capacity based on its ability to collateralize such borrowings.

Our primary sources of funds include a large, stable deposit base. Core deposits (consisting of demand, money market and savings and club accounts), primarily generated from our retail branch network, are our largest and most cost-effective source of funding. Core deposits totaled $4.8 billion at December 31, 2020, representing an increase of $1.2 billion, from $3.6 billion at December 31, 2019. The increase in core deposits was primarily driven by a $396.2 million increase in non-interset bearing demand accounts in conjunction with our acquisition of Roselle Bank, and a $468.8 million increase in interest-bearing demand accounts, mainly attributable to our Yield and Advantage Plus checking products and the increase in municipal deposits of $73.8 million, or 14.0%. We also maintain access to a diversified base of wholesale funding sources. These uncommitted sources include federal funds purchased from other banks, securities sold under agreements to repurchase, and FHLB advances. Aggregate wholesale funding totaled $799.4 million at December 31, 2020, compared to $1.4 billion as of December 31, 2019. In addition, at December 31, 2020, we had availability to borrow additional funds, subject to our ability to collateralize such borrowings from the FHLB of New York and the Federal Reserve Bank of New York.

A significant use of our liquidity is the funding of loan originations. At December 31, 2020, Columbia Bank had $282.2 million in loan commitments outstanding, which primarily consisted of commitments to fund loans of $149.8 million, $98.9 million, $16.8 million, and $13.3 million, in one-to-four family real estate, multifamily and commercial real estate, commercial business and construction loans respectively. There was also $894.5 million in unused commercial business, construction and consumer lines of credit, and $9.4 million in commercial letters of credit. Since these commitments may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management's credit evaluation of the borrower. Another significant use of

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Columbia Bank’s liquidity is the funding of deposit withdrawals. Certificates of deposit due within one year of December 31, 2020 totaled $1.5 billion, or 76.3% of total certificates of deposit. The large percentage of certificates of deposit that mature within one year reflects customers’ hesitancy to invest their funds for long periods. Management believes, however, based on past experience, that a significant portion of our certificates of deposit will be renewed. If these maturing deposits do not remain with us, we will be required to seek other sources of funds, including other certificates of deposit and borrowings. Depending on market conditions, we may be required to pay higher rates on such deposits and borrowings than we currently pay on the certificates of deposit due on or before December 31, 2020. We have the ability to attract and retain deposits by adjusting the interest rates offered.

    The following table presents certain of our contractual obligations at December 31, 2020:

	Payments due by period
	Total		One Year or Less		More Than One Year to Three Years		More Than Three Years to Five Years		More Than Five Years
	(In thousands)
Borrowed funds	$	792,412	$	496,042	$	220,097	$	76,273	$	—
Commitments to fund loans	282,198		282,198		—		—		—
Unused lines of credit	894,489		478,558		187,438		70,496		157,997
Standby letters of credit	9,392		8,554		838		—		—
Total	$	2,000,555	$	1,269,362	$	415,307	$	151,269	$	164,617

    Our primary investing activities are the origination of loans and the purchase of securities. Our primary financing activities consist of activity in deposit accounts and borrowings. Deposit flows are affected by the overall level of market interest rates, the interest rates and products offered by us, local competitors and other factors. We generally manage the pricing of our deposits to be competitive. Occasionally, we offer promotional rates on certain deposit products to attract deposits.

Columbia Financial is a separate legal entity from Columbia Bank and must provide for its own liquidity in addition to its operating expenses. Columbia Financial’s primary source of income is dividends received from Columbia Bank. The amount of dividends that Columbia Bank may declare and pay to Columbia Financial is generally restricted under federal regulations to the retained earnings of Columbia Bank. At December 31, 2020, on a stand-alone basis, Columbia Financial had liquid assets of $94.2 million.

Capital Management.   We are subject to various regulatory capital requirements administered by our federal banking regulators, including a risk-based capital measure. The Federal Reserve establishes capital requirements, including well capitalized standards, for our consolidated financial holding company, and the OCC has similar requirements for our Company's subsidiary bank. The risk-based capital guidelines include both a definition of capital and a framework for calculating risk-weighted assets by assigning balance sheet assets and off-balance sheet items to broad risk categories. At December 31, 2020, we exceeded all of our regulatory capital requirements. We are considered “well capitalized” under regulatory guidelines. See “Item 1: Business - Regulation and Supervision - Federal Banking Regulations - Capital Requirements” and note 13 in the notes to the consolidated financial statements included in this report.

Off-Balance Sheet Arrangements.   In the normal course of operations, we engage in a variety of financial transactions that, in accordance with generally accepted accounting principles, are not recorded in our consolidated financial statements. These transactions involve, to varying degrees, elements of credit, interest rate and liquidity risk. Such transactions are used primarily to manage customers’ requests for funding and take the form of loan commitments and lines of credit. For information about our loan commitments, see note 16 in the notes to the consolidated financial statements included in this report.

For the years ended December 31, 2020 and 2019, we did not engage in any off-balance sheet transactions reasonably likely to have a material effect on our financial condition, results of operations or cash flows.

    Derivative Financial Instruments. Columbia Bank executes interest rate swaps with third parties in order to hedge the interest expense of short-term FHLB advances. Those interest rate swaps are simultaneous with entering into the short-term borrowings with the FHLB. These derivatives are designated as cash flow hedges and are not speculative. As these interest rate swaps meet the hedge accounting requirements, the effective portion of changes in the fair value are recognized in accumulated other comprehensive income. As of December 31, 2020, Columbia Bank had 31 interest rate swaps with notional amounts of $430.0 million hedging certain FHLB advances.

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Columbia Bank presently offers interest rate swaps to commercial banking customers to manage their risk of exposure and risk management strategies. Those interest rate swaps are simultaneously hedged by offsetting interest rate swaps that Columbia Bank executes with a third party, such that Columbia Bank would minimize its net risk exposure resulting from such transactions. These derivatives are not designated as hedges and are not speculative. Rather, these derivatives result from a service Columbia Bank offers to certain customers. As the interest rate swaps would not meet the hedge accounting requirements, changes in the fair value of both the customer swaps and the offsetting third party swap contracts are recognized directly in earnings. At December 31, 2020, we had interest rate swaps in place with 48 commercial banking customers executed by offsetting interest rate swaps with third parties, with an aggregated notional amount of $175.1 million.

Columbia Bank offers currency forward contracts to certain commercial banking customers to facilitate international trade. Those forward contracts are simultaneously hedged by offsetting forward contracts that Columbia Bank would execute with a third party, such that Columbia Bank would minimize its net risk exposure resulting from such transactions. These derivatives are not designated as hedges and are not speculative. Rather, these derivatives result from a service Columbia Bank offers to certain commercial customers. As the currency forward contract does not meet the hedge accounting requirements, changes in the fair value of both the customer forward contract and the offsetting forward contract is recognized directly in earnings. At December 31, 2020, Columbia Bank had no currency forward contracts in place with. commercial banking customers.

Recent Accounting Pronouncements

For a discussion of the impact of recent accounting pronouncements, see note 2 in the notes to the consolidated financial statements included in this report.

Effect of Inflation and Changing Prices

The consolidated financial statements and related consolidated financial data presented in this report have been prepared in accordance with accounting principles generally accepted in the United States of America, which require the measurement of financial position and operating results in terms of historical dollars without considering changes in the relative purchasing power of money over time due to inflation. The primary impact of inflation on our operations is reflected in increased operating costs. Unlike most industrial companies, virtually all the assets and liabilities of a financial institution are monetary in nature. As a result, interest rates generally have a more significant impact on a financial institution’s performance than do general levels of inflation. Interest rates do not necessarily move in the same direction or to the same extent as the prices of goods and services because such prices are affected by inflation to a larger extent than interest rates.

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Item 7A.     Quantitative and Qualitative Disclosures About Market Risk

    The information required by this item is incorporated herein by reference to the section captioned “Item 7: Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Item 8.     Financial Statements and Supplementary Data

    The information required by this item is included beginning on page 81 of this report.

The following are included in this item:
(A)	Report of Independent Registered Public Accounting Firm
(B)	Report of Independent Registered Public Accounting Firm on Internal Control Over Financial Reporting
(C)	Consolidated Financial Statements:
	(1)	Consolidated Statements of Financial Condition as of December 31, 2020 and 2019
	(2)	Consolidated Statements of Income for the years ended December 31, 2020, 2019 and 2018
	(3)	Consolidated Statements of Comprehensive Income (Loss) for the years ended December 31, 2020, 2019 and 2018
	(4)	Consolidated Statements of Changes in Stockholders' Equity for the years ended December 31, 2020, 2019 and 2018
	(5)	Consolidated Statements of Cash Flows for the years ended December 31, 2020, 2019 and 2018
	(6)	Notes to the Consolidated Financial Statements
(D)	Columbia Financial, Inc. Condensed Financial Statements
	(1)	Statements of Financial Condition as of December 31, 2020 and 2019
	(2)	Statements of Income and Comprehensive Income (Loss) for the years ended December 31, 2020, 2019 and 2018
	(3)	Statements of Cash Flows for the years ended December 31, 2020, 2019 and 2018

Item 9.     Change in and Disagreements With Accountants on Accounting and Financial Disclosure

    None.

Item 9A.     Controls and Procedures

Conclusion Regarding the Effectiveness of Disclosure Controls and Procedures

An evaluation was performed under the supervision and with the participation of the Company’s management, including the Chief Executive Officer and the Chief Financial Officer, of the effectiveness of the design and operation of the Company’s disclosure controls and procedures (as defined in Rule 13a-15(e) promulgated under the Exchange Act of 1934, as amended) as of December 31, 2020. In designing and evaluating the Company’s disclosure controls and procedures, the Company and its management recognize that any controls and procedures, no matter how well-designed and operated, can provide only a reasonable assurance of achieving the desired control objectives, and management necessarily was required to apply its judgment in evaluating and implementing possible controls and procedures. Based on that evaluation, the Company’s management, including the Chief Executive Officer and the Chief Financial Officer, concluded that the Company’s disclosure controls and procedures are effective to ensure that information required to be disclosed by the Company in the reports it files or submits under the Exchange Act is recorded, processed, summarized and reported as of the end of the period covered by this annual report.

Changes in Internal Control over Financial Reporting

There were no changes in the Company's internal control over financial reporting that occurred during the quarter ended December 31, 2020 that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

Management’s Report on Internal Control Over Financial Reporting

The management of the Company is responsible for establishing and maintaining adequate internal control over financial reporting. The Company's internal control system is a process designed to provide reasonable assurance to the Company's management and board of directors regarding the preparation and fair presentation of published financial statements.

The Company's internal control over financial reporting includes policies and procedures that pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect transactions and dispositions of assets; provide reasonable assurances

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that transactions are recorded as necessary to permit preparation of financial statements in accordance with U.S. generally accepted accounting principles; and provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of the Company's assets that could have a material effect on its financial statements.

All internal control systems, no matter how well designed, have inherent limitations. Therefore, even those system determined to be effective can provide only reasonable assurance with respect to financial statement preparation and presentation. Also, projections of any evaluation of effectiveness of future periods are subject to the risk that controls may be inadequate due to changes in conditions, or that the degree of compliance with policies and procedures may deteriorate.

As part of the Company’s program to comply with Section 404 of the Sarbanes-Oxley Act of 2002, our management assessed the effectiveness of the Company’s internal control over financial reporting as of December 31, 2020 (the “Assessment”). In making this Assessment, management used the control criteria framework of the Committee of Sponsoring Organizations (“COSO”) of the Treadway Commission published in its report entitled Internal Control - Integrated Framework (2013). Management’s Assessment included an evaluation of the design of the Company’s internal control over financial reporting and testing of the operational effectiveness of its internal control over financial reporting. Based on this assessment, the Company’s management concluded that the Company’s internal control over financial reporting was effective as of December 31, 2020.

Report of Independent Registered Public Accounting Firm

The attestation report by the Company’s independent registered public accounting firm, KPMG LLP, on the Company’s internal control over financial reporting is included with the audited consolidated financial statements of the Company beginning on page 81 of this report.

Item 9B.    Other Information

    None.

PART III

Item 10.     Directors, Executive Officers and Corporate Governance

Board of Directors

For information relating to the directors of the Company, the section captioned “Proposal 1--Election of Directors” in the Company’s Proxy Statement for the 2021 Annual Meeting of Stockholders is incorporated herein by reference.

Executive Officers

For information relating to officers of the Company, see Part I, Item 1, “Business-Information About Our Executive Officers” to this Annual Report on Form 10-K.

Compliance with Section 16(a) of the Securities Exchange Act of 1934

For information regarding compliance with Section 16(a) of the Securities Exchange Act of 1934, the cover page to this Annual Report on Form 10-K and the section captioned “Stock Ownership-Section 16(a) Beneficial Ownership Reporting Compliance” in the Company’s Proxy Statement for the 2021 Annual Meeting of Stockholders are incorporated herein by reference.

Disclosure of Code of Ethics

For information concerning the Company’s Code of Ethics, the information contained under the section captioned “Corporate Governance-Code of Ethics and Business Conduct” in the Company’s Proxy Statement for the 2021 Annual Meeting of Stockholders is incorporated by reference. A copy of the Code of Ethics and Business Conduct is available to stockholders on the Company’s website at www.columbiabankonline.com.

Corporate Governance

For information regarding the Audit Committee and its composition and the audit committee financial expert, the section captioned “Corporate Governance-Meetings and Committees of the Board of Directors-Audit Committee” in the Company’s Proxy Statement for the 2021 Annual Meeting of Stockholders is incorporated herein by reference.

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Item 11.     Executive Compensation

Executive Compensation

    For information regarding executive compensation, the sections captioned “Executive Compensation,” “Compensation Discussion & Analysis” and “Director Compensation” in the Company’s Proxy Statement for the 2021 Annual Meeting of Stockholders are incorporated herein by reference.

Item 12.    Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

Information required by this item is incorporated herein by reference to the section captioned “Stock Ownership” in the Company’s Proxy Statement for the 2021 Annual Meeting of Stockholders.

Item 13.    Certain Relationships and Related Transactions and Director Independence

Certain Relationships and Related Transactions

For information regarding certain relationships and related transactions, the section captioned “Other Information-Transactions with Related Persons” in the Company’s Proxy Statement for the 2021 Annual Meeting of Stockholders is incorporated herein by reference.

Corporate Governance

For information regarding director independence, the section captioned “Proposal 1-Election of Directors” in the Company’s Proxy Statement for the 2021 Annual Meeting of Stockholders is incorporated herein by reference.

Item 14.    Principal Accounting Fees and Services

    For information regarding the principal accountant fees and expenses, the section captioned “Proposal 2-Ratification of Independent Registered Public Accounting Firm” in the Company’s Proxy Statement for the 2021 Annual Meeting of Stockholders is incorporated herein by reference.

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PART IV

Item 15.    Exhibits and Financial Statement Schedules

(1)	The financial statements required in response to this item are incorporated herein by reference from Item 8 of this Annual Report on Form 10-K.
(2)	All financial statement schedules are omitted because they are not required or applicable, or the required information is shown in the consolidated financial statements or the notes thereto.
(3)	Exhibits
	No.	Description	Location
	3.1	Second Amended and Restated Certificate of Incorporation of Columbia Financial, Inc.	Incorporated herein by reference to Exhibit 3.1 to the Company’s Registration Statement on Form S-1 (File No. 333-221912), initially filed on December 5, 2017
	3.2	Amended Bylaws of Columbia Financial, Inc.	Incorporated herein by reference to Exhibit 3.2 to the Company’s Registration Statement on Form S-1 (File No. 333-221912), initially filed on December 5, 2017
	4.0	Specimen Stock Certificate of Columbia Financial, Inc.	Incorporated herein by reference to Exhibit 4.0 to the Company’s Registration Statement on Form S-1 (File No. 333-221912), initially filed on December 5, 2017
	4.1	Description of Columbia Financial, Inc.'s Common Stock Registered Under Section 12 of the Securities Exchange Act of 1934	Incorporated herein by reference to Exhibit 4.1 to the Company’s Annual Report on Form 10-K for the Year Ended December 31, 2019 (File No. 001-38456), filed on March 2, 2020
	10.1	Employment Agreement between Columbia Financial, Inc., Columbia Bank and Thomas J. Kemly+	Incorporated herein by reference to Exhibit 10.1 to the Company’s Registration Statement on Form S-1 (File No. 333-221912), initially filed on December 5, 2017
	10.2	Employment Agreement between Columbia Financial, Inc., Columbia Bank and Dennis E. Gibney+	Incorporated herein by reference to Exhibit 10.2 to the Company’s Registration Statement on Form S-1 (File No. 333-221912), initially filed on December 5, 2017
	10.3	Employment Agreement between Columbia Financial, Inc., Columbia Bank and Thomas Allen, Jr.+	Incorporated herein by reference to Exhibit 10.3 to the Company’s Registration Statement on Form S-1 (File No. 333-221912), initially filed on December 5, 2017
	10.4	Employment Agreement between Columbia Financial, Inc., Columbia Bank and Geri M. Kelly+	Incorporated herein by reference to Exhibit 10.4 to the Company’s Registration Statement on Form S-1 (File No. 333-221912), initially filed on December 5, 2017

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10.5	Employment Agreement between Columbia Financial, Inc., Columbia Bank and John Klimowich+	Incorporated herein by reference to Exhibit 10.5 to the Company’s Registration Statement on Form S-1 (File No. 333-221912), initially filed on December 5, 2017
10.6	Employment Agreement between Columbia Financial, Inc., Columbia Bank and Mark S. Krukar+	Incorporated herein by reference to Exhibit 10.6 to the Company’s Registration Statement on Form S-1 (File No. 333-221912), initially filed on December 5, 2017
10.7	Employment Agreement between Columbia Financial, Inc., Columbia Bank and Brian W. Murphy+	Incorporated herein by reference to Exhibit 10.7 to the Company’s Registration Statement on Form S-1 (File No. 333-221912), initially filed on December 5, 2017
10.8	Employment Agreement between Columbia Financial, Inc., Columbia Bank and Allyson Schlesinger+	Incorporated herein by reference to Exhibit 10.8 to the Company’s Annual Report on Form 10-K (File No. 001-38456), for the Year Ended December 31, 2018, filed on March 29, 2019
10.9	Employment Agreement between Columbia Financial, Inc., Columbia Bank and Damodaram Bashyam+	Incorporated herein by reference to Exhibit 10.9 to the Company’s Annual Report on Form 10-K (File No. 001-38456), for the Year Ended December 31, 2019, filed on March 29, 2019
10.10	Employment Agreement between Columbia Financial, Inc., Columbia Bank and Oliver Lewis+	Filed herewith
10.11	Form of Columbia Bank Supplemental Executive Retirement Plan+	Incorporated herein by reference to Exhibit 10.9 to the Company’s Registration Statement on Form S-1 (File No. 333-221912), initially filed on December 5, 2017
10.12	Columbia Bank Stock-Based Deferral Plan+	Incorporated herein by reference to Exhibit 10.10 to the Company’s Registration Statement on Form S-1 (File No. 333-221912), initially filed on December 5, 2017
10.13	Columbia Bank Director Deferred Compensation Plan, as amended+	Incorporated herein by reference to Exhibit 10.11 to the Company’s Registration Statement on Form S-1 (File No. 333-221912), initially filed on December 5, 2017
10.14	Columbia Bank Retirement Income Maintenance Plan+	Incorporated herein by reference to Exhibit 10.12 to the Company’s Registration Statement on Form S-1 (File No. 333-221912), initially filed on December 5, 2017
10.15	Columbia Bank Non-Qualified Savings Income Maintenance Plan, as amended+	Incorporated herein by reference to Exhibit 10.13 to the Company’s Registration Statement on Form S-1 (File No. 333-221912), initially filed on December 5, 2017
10.16	Columbia Financial, Inc. 2019 Equity Incentive Plan	Incorporated by reference to Annex 1 to the Company's Definitive Proxy Materials on Schedule 14A (File No. 001-38456), filed on April 22, 2019

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21.0	Subsidiaries	Filed herewith
23.1	Consent of KPMG LLP	Filed herewith
31.1	Rule 13a-14(a)/15d-14(a) Certification of Chief Executive Officer	Filed herewith
31.2	Rule 13a-14(a)/15d-14(a) Certification of Chief Financial Officer	Filed herewith
32	Section 1350 Certification of Chief Executive Officer and Chief Financial Officer	Filed herewith
101.0	The following materials from the Company’s Annual Report on Form 10-K for the year ended December 31, 2020, formatted in inline XBRL (Extensible Business Reporting Language): (i) the Consolidated Statements of Financial Condition, (ii) the Consolidated Statements of Income, (iii) the Consolidated Statements of Comprehensive Income (Loss), (iv) the Consolidated Statement of Changes in Stockholders’ Equity, (v) the Consolidated Statements of Cash Flows and (vi) the Notes to the Consolidated Financial Statements.	Filed herewith
101.INS	The instance document does not appear in the interactive data file because its XBRL tags are embedded within the Inline XBRL document
101.SCH	Inline XBRL Taxonomy Extension Schema Document
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document
104	Cover page Interactive Data File (embedded within the Inline XBRL document)
+ Management contract or compensatory plan, contract or arrangement.

Item 16.    Form 10-K Summary

    Not applicable.

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Report of Independent Registered Public Accounting Firm

To the Stockholders and Board of Directors

Columbia Financial, Inc.:

Opinion on the Consolidated Financial Statements

We have audited the accompanying consolidated statements of financial condition of Columbia Financial, Inc. and subsidiaries (the Company) as of December 31, 2020 and 2019, the related consolidated statements of income, comprehensive income (loss), changes in stockholders’ equity, and cash flows for each of the years in the three‑year period ended December 31, 2020, and the related notes (collectively, the consolidated financial statements). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2020 and 2019, and the results of its operations and its cash flows for each of the years in the three‑year period ended December 31, 2020, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of December 31, 2020, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission, and our report dated March 1, 2021 expressed an unqualified opinion on the effectiveness of the Company’s internal control over financial reporting.

Basis for Opinion

These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these consolidated financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matters

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the consolidated financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of a critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Assessment of the allowance for loan losses related to loans collectively evaluated for impairment

As discussed in Notes 2 and 7 to the consolidated financial statements, the Company's allowance for loan losses related to loans collectively evaluated for impairment (ALLL) was $73.6 million of a total allowance for loan losses of $74.7 million as of December 31, 2020. The ALLL estimate consists of both quantitative and qualitative loss components. The quantitative component of the ALLL is estimated by applying loss factors based upon the loan type categorization and risk ratings assigned to real estate loans and commercial business loans (collectively, commercial loans). Quantitative loss factors give consideration to historical loss experience and migration experience by loan type over a look-back period, adjusted for loss emergence periods. Qualitative adjustments to such loss factors are applied at a portfolio level to reflect risks in the loan portfolio not captured by the quantitative component of the ALLL.

We identified the assessment of the ALLL as a critical audit matter. A high degree of audit effort, including specialized skills and knowledge, and subjective and complex auditor judgment was involved in the assessment of the ALLL due to significant

81

measurement uncertainty. Specifically, the assessment encompassed the (1) evaluation of the methodology and data used to derive the quantitative loss factors developed from the historical loss experience and migration experience and their significant assumptions, including the pooling of loans with similar characteristics, the selection of the look-back period and the loss emergence periods, and the internal risk ratings assigned to commercial loans; and (2) development and evaluation of the qualitative factor adjustments.

The following are the primary procedures we performed to address the critical audit matter. We evaluated the design and tested the operating effectiveness of certain internal controls related to the Company's measurement of the ALLL estimate, including controls over the:

•development of the ALLL methodology

•determination and measurement of significant assumptions used to determine the quantitative loss factors

•periodic testing of the internal risk ratings for commercial loans

•development of qualitative factor adjustments, including the significant assumptions used in the measurement of the qualitative factors.

We evaluated the Company's process to develop the ALLL by testing certain sources of data, factors and assumptions that the Company used, and considered the relevance and reliability of such data, factors and assumptions, including the look-back period by evaluating if loss data in the look-back period was representative of the credit characteristics of the current portfolio. We evaluated the pooling of loans with similar characteristics by assessing the relevant characteristics of the loan portfolio, including the loan type and risk rating. We assessed the appropriateness of the loss emergence period assumptions by considering the Company's credit risk policies and testing the Company's observable loss experience study. We tested the development of the qualitative factor adjustments by:

•evaluating the metrics, including the relevance of sources of data and assumptions, used to determine the qualitative factor adjustments by comparing them to the Company's business environment and credit risk factors

•evaluating trends in the total ALLL, including the qualitative factor adjustments, for consistency with trends in loan portfolio growth (attrition) and credit performance.

We involved credit risk professionals with specialized skills and knowledge, who assisted in evaluating:

•the Company's ALLL methodology for compliance with U.S. generally accepted accounting principles

•the maximum qualitative factor adjustment based on the highest losses over a consecutive four quarter interval during the look-back period

•the length of the look-back period and the loss emergence periods used in developing the quantitative loss factors, by comparing them to the Company's portfolio risk characteristics and trends

•the development of the resulting qualitative factor adjustments and the effect of those factors on the ALLL compared with relevant credit risk factors and credit trends

•the internal risk rating for a selection of commercial loans by evaluating the financial performance of the borrower and related credit information, including sources of repayment, and any relevant guarantees or underlying collateral, and credit policies of the Company.

/s/ KPMG LLP

We have not been able to determine the specific year that we began serving as the Company’s auditor; however, we are aware that we have served as the Company’s auditor since at least 1972.

Short Hills, New Jersey

March 1, 2021

82

Report of Independent Registered Public Accounting Firm

To the Stockholders and Board of Directors

Columbia Financial, Inc.:

Opinion on Internal Control Over Financial Reporting

We have audited Columbia Financial, Inc. and subsidiaries’ (the Company) internal control over financial reporting as of December 31, 2020, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2020, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated statements of financial condition of the Company as of December 31, 2020 and 2019, the related consolidated statements of income, comprehensive income (loss), changes in stockholders’ equity, and cash flows for each of the years in the three‑year period ended December 31, 2020, and the related notes (collectively, the consolidated financial statements), and our report dated March 1, 2021 expressed an unqualified opinion on those consolidated financial statements.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audit also included performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ KPMG LLP

Short Hills, New Jersey

March 1, 2021

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Consolidated Statements of Financial Condition

(In thousands, except share and per share data)

	December 31,
	2020		2019
Assets
Cash and due from banks	$	422,787	$	75,420
Short-term investments	170		127
Total cash and cash equivalents	422,957		75,547
Debt securities available for sale, at fair value	1,316,952		1,098,336
Debt securities held to maturity, at amortized cost (fair value of $277,091 and $289,505 at December 31, 2020 and 2019, respectively)	262,720		285,756
Equity securities, at fair value	5,418		2,855
Federal Home Loan Bank stock	43,759		69,579
Loans held-for-sale, at fair value	4,146		—
Loans receivable	6,181,770		6,197,566
Less: allowance for credit losses	74,676		61,709
Loans receivable, net	6,107,094		6,135,857
Accrued interest receivable	29,456		22,092
Office properties and equipment, net	75,974		72,967
Bank-owned life insurance	232,824		211,415
Goodwill and intangible assets	87,384		68,582
Other assets	209,852		145,708
Total assets	$	8,798,536	$	8,188,694
Liabilities and Stockholders' Equity
Liabilities:
Deposits	$	6,778,624	$	5,645,842
Borrowings	799,364		1,407,022
Advance payments by borrowers for taxes and insurance	32,570		35,507
Accrued expenses and other liabilities	176,691		117,806
Total liabilities	7,787,249		7,206,177
Stockholders' equity:
Preferred stock, $0.01 par value. 10,000,000 shares authorized; none issued and outstanding at December 31, 2020 and 2019	—		—
Common stock, $0.01 par value. 500,000,000 shares authorized; 122,037,793 shares issued and 110,939,753 shares outstanding at December 31, 2020, and 117,278,745 shares issued and 113,765,387 shares outstanding at December 31, 2019	1,220		1,173
Additional paid-in capital	609,531		531,667
Retained earnings	673,084		615,481
Accumulated other comprehensive loss	(69,625)		(68,735)
Treasury stock, at cost; 11,098,040 shares at December 31, 2020 and 3,513,358 shares at December 31, 2019	(163,015)		(54,950)
Common stock held by the Employee Stock Ownership Plan	(39,293)		(41,564)
Stock held by Rabbi Trust	(1,875)		(1,520)
Deferred compensation obligations	1,260		965
Total stockholders' equity	1,011,287		982,517
Total liabilities and stockholders' equity	$	8,798,536	$	8,188,694
See notes to consolidated financial statements.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Consolidated Statements of Income

(In thousands, except share and per share data)

	Years Ended December 31,
	2020		2019		2018
Interest income:
Loans receivable	$	255,236	$	217,774	$	189,869
Debt securities available for sale and equity securities	28,376		30,938		25,338
Debt securities held to maturity	8,025		8,180		7,147
Federal funds and interest-earning deposits	413		594		1,175
Federal Home Loan Bank stock dividends	3,661		3,597		2,761
Total interest income	295,711		261,083		226,290
Interest expense:
Deposits	55,246		61,551		39,523
Borrowings	18,892		27,161		22,733
Total interest expense	74,138		88,712		62,256
Net interest income	221,573		172,371		164,034
Provision for loan losses	18,447		4,224		6,677
Net interest income after provision for credit losses	203,126		168,147		157,357
Non-interest income:
Demand deposit account fees	3,633		4,478		3,987
Bank-owned life insurance	6,620		5,846		5,208
Title insurance fees	5,034		4,981		4,297
Loan fees and service charges	2,419		6,707		2,519
Gain on securities transactions	370		2,612		116
Change in fair value of equity securities	767		305		—
Gain on sale of loans	5,444		785		618
Other non-interest income	6,983		5,922		4,943
Total non-interest income	31,270		31,636		21,688
Non-interest expense:
Compensation and employee benefits	100,687		84,256		77,226
Occupancy	19,170		16,180		14,547
Federal deposit insurance premiums	1,901		895		1,893
Advertising	2,641		3,932		4,137
Professional fees	5,810		5,913		4,619
Data processing	3,342		3,001		2,600
Charitable contribution to foundation	—		—		34,767
Merger-related expenses	1,931		2,755		—
Loss on extinguishment of debt	1,158		—		—
Other non-interest expense	21,499		11,769		5,597
Total non-interest expense	158,139		128,701		145,386
Income before income tax expense	76,257		71,082		33,659
Income tax expense	18,654		16,365		10,923
Net income	$	57,603	$	54,717	$	22,736
Earnings per share - basic and diluted	$	0.52	$	0.49	$	0.20
Weighted average shares outstanding - basic and diluted	109,755,924		111,101,246		111,395,723
See notes to consolidated financial statements.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Consolidated Statements of Comprehensive Income (Loss)

(In thousands)

	Years Ended December 31,
	2020		2019		2018
Net income	$	57,603	$	54,717	$	22,736
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on debt securities available for sale	21,236		21,067		(5,778)
Accretion of unrealized gain (loss) on debt securities reclassified as held to maturity	126		9		(13)
Reclassification adjustment for gain (loss) included in net income	289		2,011		(92)
	21,651		23,087		(5,883)
Derivatives, net of tax:
Unrealized (loss) on swap contracts accounted for as cash flow hedges	(8,382)		(6,468)		(2,230)
	(8,382)		(6,468)		(2,230)
Employee benefit plans, net of tax:
Amortization of prior service cost included in net income	(44)		(44)		(491)
Reclassification adjustment of actuarial net (loss) gain included in net income	(3,384)		(2,930)		1,996
Change in funded status of retirement obligations	(10,731)		(9,935)		121
	(14,159)		(12,909)		1,626
Total other comprehensive (loss) income	(890)		3,710		(6,487)
Total comprehensive income, net of tax	$	56,713	$	58,427	$	16,249
See notes to consolidated financial statements.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Consolidated Statements of Changes in Stockholders' Equity

(In thousands)

	Common Stock		Additional Paid-in-Capital		Retained Earnings		Accumulated Other Comprehensive (Loss)		Treasury Stock		Common Stock Held by the Employee Stock Ownership Plan		Stock Held by Rabbi Trust		Deferred Compensation Obligations		Total Stockholders' Equity
Balance at December 31, 2017	$	—	$	—	$	537,480	$	(65,410)	$	—	$	—	$	—	$	—	$	472,070
Net income	—		—		22,736		—		—		—		—		—		22,736
Other comprehensive loss	—		—		—		(6,487)		—		—		—		—		(6,487)
Issuance of common stock to Columbia Bank, MHC (62,580,155 shares)	626		—		—		—		—		—		—		—		626
Issuance of common stock in initial public offering (49,832,345 shares)	498		491,304		—		—		—		—		—		—		491,802
Issuance of shares to Columbia Bank Foundation (3,476,675 shares)	35		34,732		—		—		—		—		—		—		34,767
Purchase of Employee Stock Ownership Plan shares	—		—		—		—		—		(45,428)		—		—		(45,428)
Employee Stock Ownership Plan shares committed to be released	—		1,001		—		—		—		1,593		—		—		2,594
Funding of deferred compensation obligations	—		—		—		—		—		—		(1,259)		639		(620)
Balance at December 31, 2018	$	1,159	$	527,037	$	560,216	$	(71,897)	$	—	$	(43,835)	$	(1,259)	$	639	$	972,060
See notes to consolidated financial statements.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Consolidated Statements of Changes in Stockholders' Equity (continued)

(In thousands)

	Common Stock		Additional Paid-in-Capital		Retained Earnings		Accumulated Other Comprehensive (Loss)		Treasury Stock		Common Stock Held by the Employee Stock Ownership Plan		Stock Held by Rabbi Trust		Deferred Compensation Obligations		Total Stockholders' Equity
Balance at December 31, 2018	$	1,159	$	527,037	$	560,216	$	(71,897)	$	—	$	(43,835)	$	(1,259)	$	639	$	972,060
Effect of the adoption of Accounting Standards Update ("ASU") 2016-01	—		—		548		(548)		—		—		—		—		—
Balance at January 1, 2019	1,159		527,037		560,764		(72,445)		—		(43,835)		(1,259)		639		972,060
Net income	—		—		54,717		—		—		—		—		—		54,717
Other comprehensive income	—		—		—		3,710		—		—		—		—		3,710
Issuance of common stock allocated to restricted stock award grants (1,464,243 shares)	14		—		—		—		—		—		—		—		14
Treasury stock allocated to restricted stock award grants	—		(1,095)		—		—		1,095		—		—		—		—
Stock based compensation	—		3,694		—		—		—		—		—		—		3,694
Purchase of treasury stock (3,543,800 shares)	—		—		—		—		(55,309)		—		—		—		(55,309)
Restricted stock forfeitures (44,231 shares)	—		736		—		—		(736)		—		—		—		—
Employee Stock Ownership Plan shares committed to be released	—		1,295		—		—		—		2,271		—		—		3,566
Funding of deferred compensation obligations	—		—		—		—		—		—		(261)		326		65
Balance at December 31, 2019	$	1,173	$	531,667	$	615,481	$	(68,735)	$	(54,950)	$	(41,564)	$	(1,520)	$	965	$	982,517
See notes to consolidated financial statements.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Consolidated Statements of Changes in Stockholders' Equity (continued)

(In thousands)

	Common Stock		Additional Paid-in-Capital		Retained Earnings		Accumulated Other Comprehensive (Loss)		Treasury Stock		Common Stock Held by the Employee Stock Ownership Plan		Stock Held by Rabbi Trust		Deferred Compensation Obligations		Total Stockholders' Equity
Balance at December 31, 2019	$	1,173	$	531,667	$	615,481	$	(68,735)	$	(54,950)	$	(41,564)	$	(1,520)	$	965	$	982,517
Net income	—		—		57,603		—		—		—		—		—		57,603
Other comprehensive income (loss)	—		—		—		(890)		—		—		—		—		(890)
Issuance of common stock to Columbia Bank MHC (4,759,048 shares)	47		68,483		—		—		—		—		—		—		68,530
Treasury stock allocated to restricted stock award grants	—		(481)		—		—		481		—		—		—		—
Stock based compensation	—		8,790		—		—		—		—		—		—		8,790
Purchase of treasury stock 7,587,142 shares)	—		—		—		—		(108,166)		—		—		—		(108,166)
Restricted stock forfeitures (17,247 shares)	—		175		—		—		(199)		—		—		—		(24)
Repurchase shares on restricted stock vesting to pay taxes (13,453 shares)	—		7		—		—		(181)		—		—		—		(174)
Employee Stock Ownership Plan shares committed to be released	—		890		—		—		—		2,271		—		—		3,161
Funding of deferred compensation obligations	—		—		—		—		—		—		(355)		295		(60)
Balance at December 31, 2020	$	1,220	$	609,531	$	673,084	$	(69,625)	$	(163,015)	$	(39,293)	$	(1,875)	$	1,260	$	1,011,287
See notes to consolidated financial statements.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Consolidated Statements of Cash Flows

(In thousands)

	Years Ended December 31,
	2020		2019		2018
Cash flows from operating activities:
Net income	$	57,603	$	54,717	$	22,736
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of deferred loan fees, costs, and purchased premiums and discounts	(1,464)		1,205		1,965
Net amortization of premiums and discounts on securities	2,508		1,160		1,212
Net amortization of mortgage servicing rights	130		(109)		(88)
Amortization of debt issuance costs	—		—		890
Amortization of intangible assets	1,048		222		—
Depreciation and amortization of office properties and equipment	6,543		4,880		3,839
Amortization of operating lease right-of-use assets	2,641		—		—
Provision for loan losses	18,447		4,224		6,677
Gain on securities transactions	(370)		(2,612)		(116)
Change in fair value of equity securities	(767)		(305)		—
Gain on securitizations	(3,544)		—		—
Gain on sale of loans	(1,900)		(785)		(618)
Loss on real estate owned	—		1		56
Loss on write-down of real estate owned	—		—		55
Loss (gain) on disposal of office properties and equipment	734		3		(5)
Loss on write-down of office properties and equipment	114		—		—
Loss on write-down of mortgage servicing rights	75		—		—
Deferred tax expense (benefit)	9,738		7,527		(5,490)
(Increase) in accrued interest receivable	(6,685)		(959)		(2,979)
(Increase) in other assets	(75,127)		(51,856)		(11,053)
Increase in accrued expenses and other liabilities	32,891		3,032		7,980
Income on bank-owned life insurance	(6,620)		(5,846)		(5,208)
Contribution of common stock to Columbia Bank Foundation	—		—		34,767
Employee stock ownership plan expense	3,161		3,566		2,594
Stock based compensation	8,790		3,694		—
(Increase) decrease in deferred compensation obligations under Rabbi Trust	(60)		65		(620)
Net cash provided by operating activities	$	47,886	$	21,824	$	56,594
Cash flows from investing activities:
Proceeds from sales of debt securities available for sale	$	20,761	$	65,198	$	11,513
Proceeds from sales of equity securities	—		1,065		—
Proceeds from paydown/maturities/calls of debt securities available for sale	247,908		149,683		69,977
Proceeds from paydown/maturities/calls of debt securities held to maturity	48,640		46,133		8,820
Purchases of debt securities available for sale	(292,809)		(176,171)		(413,804)
Purchases of debt securities held to maturity	(12,815)		(70,126)		(31,639)
Purchases of equity securities	—		(416)		—
Proceeds from sales of loans held-for-sale	111,764		101,946		3,615
Proceeds from sales of loans receivable	35,613		11,671		32,039
Purchases of loans receivable	—		(89,774)		(32,251)
Net increase in loans receivable	(80,498)		(503,772)		(536,129)
See notes to consolidated financial statements.

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Consolidated Statements of Cash Flows (continued)

(In thousands)

	Years Ended December 31,
	2020		2019		2018
Purchase of bank-owned life insurance	—		—		(30,000)
Proceeds from bank-owned life insurance death benefits	627		1,015		1,241
Proceeds from redemptions of Federal Home Loan Bank stock	50,374		72,871		67,035
Purchases of Federal Home Loan Bank stock	(22,544)		(79,796)		(81,309)
Proceeds from sales of office properties and equipment	—		—		8
Additions to office properties and equipment	(4,624)		(19,344)		(13,272)
Proceeds from sales of real estate owned	—		91		1,007
Net cash acquired in acquisitions	155,248		(31,288)		—
Net cash provided by (used in) investing activities	$	257,645	$	(521,014)	$	(943,149)
Cash flows from financing activities:
Net increase in deposits	$	799,548	$	449,270	$	150,558
Proceeds from long-term borrowings	90,000		140,000		220,980
Payments on long-term borrowings	(343,939)		(230,000)		(210,000)
Net (decrease) increase in short-term borrowings	(374,847)		225,081		299,800
Payments of subordinated debt and trust preferred securities	(16,600)		—		(51,547)
(Decrease) increase in advance payments by borrowers for taxes and insurance	(3,919)		3,121		6,467
Issuance of common stock	—		14		492,428
Purchase of treasury stock	(108,166)		(55,309)		—
Purchase of employee stock ownership plan shares	—		—		(45,428)
Restricted stock forfeitures	(24)		(736)		—
Restricted stock repurchased on vesting to pay taxes	(174)		—		—
Issuance of treasury stock allocated to restricted stock award grants	—		1,095		—
Net cash provided by financing activities	$	41,879	$	532,536	$	863,258
Net increase (decrease) in cash and cash equivalents	$	347,410	$	33,346	$	(23,297)
Cash and cash equivalents at beginning of period	75,547		42,201		65,498
Cash and cash equivalents at end of period	$	422,957	$	75,547	$	42,201
Cash paid during the period for:
Interest on deposits and borrowings	$	75,557	$	87,370	$	61,987
Income tax payments, net of (refunds)	$	10,526	$	(2,893)	$	21,325
Non-cash investing and financing activities:
Transfer of loans receivable to real estate owned	$	—	$	—	$	251
Transfer of loans receivable to loans held-for-sale	$	114,171	$	93,147	$	11,696
Securitization of loans	$	117,259	$	21,615	$	—
Initial recognition of operating lease right-of-use asset	$	22,218	$	—	$	—
Initial recognition of operating lease liabilities	$	23,290	$	—	$	—
See notes to consolidated financial statements.

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Consolidated Statements of Cash Flows (continued)

(In thousands)

	Years Ended December 31,
	2020		2019		2018
Acquisitions:
Non-cash assets acquired:
Debt securities available for sale	$	51,479	$	51,710	$	—
Debt securities held to maturity	13,418		—		—
Equity securities	1,796		1,073		—
Federal Home Loan Bank stock	2,010		3,716		—
Loans receivable	171,593		757,223		—
Accrued interest receivable	679		2,239		—
Office properties and equipment, net	5,774		6,815		—
Bank-owned life insurance	17,245		22,096		—
Deferred tax assets, net	6,475		3,534		—
Core deposit and other intangibles	—		7,467		—
Other assets	1,489		767		—
Total non-cash assets acquired	$	271,958	$	856,640	$	—
Liabilities assumed:
Deposits	$	333,234	$	782,698	$	—
Borrowings	37,728		82,761		—
Advance payments by borrowers for taxes and insurance	982		356		—
Accrued expenses and other liabilities	5,400		14,584		—
Total liabilities assumed	$	377,344	$	880,399	$	—
Net non-cash liabilities acquired	$	(105,386)	$	(23,759)	$	—
Net cash and cash equivalents acquired in acquisition	$	155,248	$	105,006	$	—
See notes to consolidated financial statements.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(1)    Business

    On April 19, 2018, the Company completed its minority stock offering, after receiving all regulatory approvals. In connection with the closing, 62,580,155 shares of its common stock were issued to Columbia Bank, MHC (the "MHC"), the mutual holding company of Columbia Financial, Inc., 3,476,675 shares were issued to the Columbia Bank Foundation, the Bank's charitable foundation, and 49,832,345 shares were issued to depositors of the Bank, who subscribed for and were allocated shares in the minority stock offering, as well as the Columbia Bank Employee Stock Ownership Plan (the "ESOP"). The accounts of the MHC are not consolidated in the consolidated financial statements of the Company.

    On November 1, 2019, the Company completed its acquisition of Stewardship Financial Corporation ("Stewardship"), pursuant to the Agreement and Plan of Merger, dated as of June 6, 2019 (the "Merger Agreement"), by and among Columbia Financial, Broadway Acquisition Corp. (a wholly owned subsidiary of Columbia Financial) and Stewardship. Under the terms of the merger agreement, each outstanding share of Stewardship common stock was converted into the right to received $15.75 in cash at the effective time of the merger.The total consideration paid was $136.3 million.

    On April 1, 2020, the Company completed its acquisition of RSB Bancorp, MHC, RSB Bancorp, Inc. and Roselle Bank (collectively, the "Roselle Entities" or "Roselle"). Pursuant to the terms of the Merger Agreement, RSB Bancorp, MHC merged with and into the MHC, with the MHC as the surviving entity; and Roselle Bank merged with and into the Bank, with the Bank as the surviving institution. Under the terms of the merger agreement, depositors of Roselle Bank became depositors of the Bank and have the same rights and privileges in the MHC as if their accounts had been established at the Bank on the date established at Roselle Bank. The Company issued 4,759,048 shares of its common stock to the MHC, representing an amount equal to the fair value of the Roselle Entities as determined by an independent appraiser, at the effective time of the merger.

(2)    Summary of Significant Accounting Policies

Principles of Consolidation

    The accompanying consolidated financial statements include the accounts of Columbia Financial, Inc., its wholly-owned subsidiary, Columbia Bank (the "Bank") and the Bank's wholly-owned subsidiaries, Columbia Investment Services, Inc., 2500 Broadway Corp. 1901 Residential Management Co. LLC, Plaza Financial Services, Inc., First Jersey Title Services, Inc., Real Estate Management Corp. LLC, 1901 Commercial Management Co. LLC, Stewardship Realty LLC, and CSB Realty Corp. (collectively, the “Company”). In consolidation, all intercompany accounts and transactions are eliminated. Certain reclassifications have been made in the consolidated financial statements to conform with current year classifications. During the year ended December 31, 2020, the Company revised the Consolidated Statements of Cash Flows for the years ended December 31, 2019 and 2018. The revision consisted of reclassifying the proceeds from sales of loans held-for-sale from cash flows from operating activities to cash flows from investing activities. The impact of these revisions was a decrease to cash flows from operating activities and an increase to cash flows from investing activities of $101.9 million and $3.6 million for the years ended December 31, 2019 and 2018, respectively. The revisions had no impact on cash and cash equivalents as of December 31, 2019 and 2018.

    The Company also owned 100% of the common stock of Columbia Financial Capital Trust I (the "Trust"). The Trust was used to issue trust preferred securities. In accordance with Accounting Standards Codification ("ASC") Topic 810, Consolidation, the Trust was classified as a variable interest entity and did not satisfy the conditions for consolidation. Accordingly, the Trust was treated as an unconsolidated subsidiary. In August 2018, the Company redeemed, in full $51.5 million of junior subordinated debt securities, which represented 100% of the assets of the Trust.

    The Bank's wholly owned subsidiary, Stewardship Realty, LLC, incorporated as a New Jersey corporation in 2005 was acquired in the Company's merger with Stewardship in November 2019. It is a service corporation originally organized to hold and manage property in Midland Park which was previously occupied by Atlantic Stewardship Bank.

    The Company also owns 100% of the common stock of Stewardship Statutory Trust I, which is a trust incorporated in Delaware which was also acquired in the Company's merger with Stewardship in November 2019. In accordance with ASC Topic 810, Consolidation, this Trust was classified as a variable interest entity and did not satisfy the conditions for consolidation. Accordingly, this Trust, which owns $7.0 million of trust preferred securities, which represents 100% of the assets, is treated as an unconsolidated subsidiary.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(2)    Summary of Significant Accounting Policies (continued)

Basis of Financial Statement Presentation

    The consolidated financial statements of the Company have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”). In preparing the consolidated financial statements, management is required to make estimates and assumptions about future events. These estimates and the underlying assumptions affect the reported amounts of assets and liabilities and disclosures about contingent assets and liabilities as of the dates of the Consolidated Statements of Financial Condition, and Consolidated Statements of Income for the periods presented. Material estimates that are particularly susceptible to change are the determination of the adequacy of the allowance for credit losses, evaluation of goodwill for impairment, evaluation of other-than-temporary impairment on securities, evaluation of the need for valuation allowances on deferred tax assets, and determination of liabilities related to retirement and other post-retirement benefits, among others. These estimates and assumptions are based on management’s best estimates and judgment. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment, which management believes to be reasonable under the circumstances. Such estimates and assumptions are adjusted when facts and circumstances dictate. Illiquid credit markets, volatile securities markets, and declines in the housing market and the economy generally have combined to increase the uncertainty inherent in such estimates and assumptions. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. Changes in estimates resulting from continuing changes in the economic environment will be reflected in the consolidated financial statements in future periods.

Cash and Cash Equivalents

    Cash and cash equivalents include cash on hand, amounts due from banks and interest-bearing deposits at other financial institutions and short-term investments. The Company is required by the Federal Reserve Bank System to maintain cash reserves equal to a percentage of certain deposits. At December 31, 2020 and 2019, the reserve requirement totaled $4.9 million and $8.8 million, respectively.

Securities

    Securities are classified as available for sale and held to maturity. Management determines the appropriate classification of securities at the time of purchase. Securities that management has the positive intent and ability to hold to maturity are classified as held to maturity and reported at amortized cost. Securities not classified as held to maturity are classified as available for sale and carried at estimated fair value, with unrealized holding gains or losses, net of taxes, reported as a separate component of accumulated other comprehensive income or loss ("OCI") included in stockholders' equity.

The fair values of these securities are based on market quotations or matrix pricing as discussed in note 17. The Company evaluates securities for other-than-temporary impairment at each reporting period and more frequently when economic or market conditions warrant such evaluation. In this evaluation, if such declines were deemed other-than temporary, management would measure the total credit-related component of the unrealized loss, and recognize that portion of the loss as a charge to current period earnings. The remaining portion of the unrealized loss would be recognized as an adjustment to OCI. The fair value of the securities portfolio is significantly affected by changes in interest rates. In general, as interest rates rise, the fair value of fixed-rate securities decreases and as interest rates fall, the fair value of fixed-rate securities increases. The Company determines if it has the intent to sell securities or if it more likely than not that the Company would be required to sell the securities before the anticipated recovery. If either exists, the decline in value is considered other-than-temporary and would be recognized in current period earnings.

    Premiums and discounts on securities are generally amortized and accreted to income over the contractual lives of the securities using the level-yield method. Premiums on callable securities are amortized to the earliest call date. Dividend and interest income are recognized when earned. Realized gains and losses are recognized when securities are sold or called based on the specific identification method.

    In the ordinary course of business, securities are pledged as collateral in conjunction with the Company’s borrowings, lines of credit, and public funds on deposit.

Federal Home Loan Bank Stock

    The Bank, as a member of the Federal Home Loan Bank of New York (the "FHLB"), is required to hold shares of capital stock of the FHLB based on its activities, primarily its outstanding borrowings. The Bank carries the investment at cost, or par value, which approximates fair value. Cash dividends are reported as income.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(2)    Summary of Significant Accounting Policies (continued)

Loans Held-for-Sale

    Loans held-for-sale consists of loans intended for sale in the secondary market. These loans are carried at the lower of cost or estimated fair value, less costs to sell, as determined on an individual loan basis. Net unrealized losses, if any, are recognized in a valuation allowance through a charge to earnings. Origination fees and costs on loans held-for-sale are deferred and recognized on settlement dates as a component of the gain or loss on sale. Loans held-for-sale are generally sold with loan servicing rights retained by the Bank.

Loans Receivable

    Loans receivable are carried at unpaid principal balances adjusted by unamortized premiums and unearned discounts, net deferred origination fees and costs less the allowance for loan losses. The Bank defers loan origination fees and certain direct loan origination costs and accretes such amounts as an adjustment to the yield over the expected lives of the related loans using the level-yield method. Interest income on loans is accrued and credited to income as earned. Premiums and discounts on loans purchased are amortized or accreted as an adjustment to yield over the contractual lives of the related loans using methodologies which approximate the level-yield method.

    A loan is considered delinquent when payment has not been received within 30 days of its contractual due date. Generally, a loan in designated as a non-accrual loan when the payment of interest is 90 days or more in arrears of its contractual due date. When a loan is placed on non-accrual status, any interest accrued but not received is reversed against interest income. Payments received on a non-accrual loan are either applied to the outstanding principal balance or recorded as interest income, depending on an assessment of the ability to collect the loan. Non-accruing loans are returned to accrual status after there has been a sustained period of repayment performance (generally six consecutive months of payment) and both principal and interest are deemed collectible. The Company identifies loans which may need to be charged-off as a loss, by reviewing all delinquent loans, classified loans and other loans that management may have concerns about collectability.

    An impaired loan is defined as a loan for which it is probable, based on current information, that the Bank will not collect all amounts due under the contractual terms of the loan agreement. The Bank considers the population of loans in its impairment analysis to include all multifamily and commercial real estate, construction, and commercial business loans with an outstanding balance greater than $500,000 and not accruing interest, and loans modified in a troubled debt restructuring. The Company also considers residential real estate, and home equity loans and advances that are not accruing or modified in a troubled debt restructuring for impairment. Other loans may be included in the population of loans in its impairment analysis if management has specific information of a collateral shortfall. Loan impairment is measured based on the present value of expected future cash flows discounted at the loan's effective interest rate or, as a practical expedient, at the loan's observable market price or the fair value of the collateral if the loan is collateral dependent. Payments received on impaired loans are recognized on a cash basis.

Purchased Credit-Impaired ("PCI") Loans

    Purchased credit impaired loans are loans acquired through acquisitions at a discount primarily due to deteriorated credit quality. PCI loans are recorded at fair value at the date of acquisition, based upon the present value of expected future cash flows, with no carryover of the related allowance for credit losses. Determining the fair value of the loans involves projecting the amount and timing of principal and/or interest cash flows expected to be collected on the loans discounting those cash flows at a market rate of interest. The excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable yield and is recognized into interest income over the remaining life of the loan. The difference between contractually required payments at acquisition and the cash flows expected to be collected at acquisition is referred to as the nonaccretable yield. The nonaccretable yield represents estimated future credit losses expected to be incurred over the life of the loan. Subsequent decreases to the expected cash flows require us to evaluate the need for an allowance for credit losses. Subsequent improvements in expected cash flows result in the reversal of a corresponding amount of the nonacretable yield which we then reclassify as accretable yield that is recognized into interest income over the remaining life of the loan using the interest method. The evaluation of the amount of future cash flows that is expected to be collected is performed in a similar manner used to determine the allowance for loan losses. Any charge-offs of principal on acquired loans would first be applied against the nonaccretable yield portion of the fair value adjustment.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(2)    Summary of Significant Accounting Policies (continued)

Allowance for Loan Losses

    Losses on loans are charged to the allowance for loan losses. Additions to this allowance are made by recoveries of loans previously charged off and by a provision charged to expense. The determination of the balance of the allowance for loan losses is based on an analysis of the loan portfolio, economic conditions, historical loan loss experience and other factors that warrant recognition in providing an adequate allowance. Estimates and judgments required to establish the allowance include: overall economic environment; value of collateral; strength of guarantors; loss exposure in the event of default; the amount and timing of future cash flows on impaired loans; and determination of loss factors applied to the portfolio segments. These estimates are susceptible to significant change. Management regularly reviews loss experience within the portfolio and monitors current economic conditions and other factors related to the collectability of the loan portfolio. While management uses available information, future additions to the allowance may be necessary based on changes in economic conditions in the Bank's market area. In addition, regulatory agencies, as an integral part of their examination process, periodically review the adequacy of the Bank's allowance for loan losses as an integral part of their examination. Such agencies may require the Bank to recognize additions to the allowance or additional write-downs based on their judgments about information available to them at the time of their examination. Although management uses the best information available, the level of the allowance for loan losses remains an estimate that is subject to significant uncertainties.

Troubled Debt Restructuring

    Troubled debt restructured loans are those loans where the Company has granted a concession it would not otherwise consider because of economic or legal reasons pertaining to a debtor’s financial difficulties. A concession could include a reduced interest rate below a market rate, an extension of the term of the loan, or a combination of the two methods, but generally does not result in the forgiveness of principal or accrued interest. Not all concessions granted by the Company constitute a troubled debt restructuring. Once an obligation has been restructured and designated as a troubled debt restructuring, it continues to be designed as a restructured loan until paid in full. The Company records an impairment charge equal to the difference between the present value of expected future cash flows under the restructured terms discounted at the loan’s original effective interest rate, and the loan’s carrying value. Changes in the calculated impairment due to the passage of time are recorded as an adjustment to the allowance for loan losses.

    Restructured loans that were accruing prior to the restructuring, where income was reasonably assured subsequent to the restructuring, maintain their accrual status. Restructured loans for which collectability was not reasonably assured are placed on non-accrual status, interest accruals cease, and uncollected accrued interest is reversed and charged against current income. Non-accruing restructured loans may be returned to accrual status when there is a sustained period of repayment performance (generally six consecutive months of payments), and both principal and interest are deemed collectible.

In March 2020, various regulatory agencies, including the Board of Governors of the Federal Reserve System and the Federal Deposit Insurance Corporations issued an interagency statement on loan modifications and reporting for financial institutions working with customers affected by COVID-19. The interagency statement was effective immediately and impacted accounting for loan modifications. Section 4013 of the CARES Act, “Temporary Relief from Troubled Debt Restructurings,” allows banks to temporarily suspend certain requirements under GAAP related to TDRs for a limited period of time to account for the effects of COVID-19. The Bank elected to account for modifications on certain loans under Section 4013 of the CARES Act or, if the loan modification was not eligible under Section 4013, used the criteria in the COVID-19 guidance to determine when the loan modification was not a TDR in accordance with ASC 310-40. Guidance noted that modification or deferral programs mandated by the federal or a state government related to COVID-19 would not be in the scope of ASC 310-40, such as a state program that requires all institutions within that state to suspend mortgage payments for a specified period. Furthermore, based on current evaluations, generally, we have continued the accrual of interest on these loans during the short-term modification period. The Consolidated Appropriations Act, 2021, which was enacted in late December 2020, extended certain provisions of the CARES Act, including provisions permitting loan deferral extension requests to not be treated as troubled debt restructurings.

Loans Sold and Serviced

    The Company has entered into Guarantor Swaps with Freddie Mac to improve its liquidity. In these types of transactions, the Company sells mortgage loans in exchange for Freddie Mac Mortgage Participation Certificates backed exclusively by the loans sold. The Company retains the servicing of these loans. The Company also periodically sells loans to investors and continues to service such loans for a fee. Gains or losses on the sale of loans are recorded on trade date using the specific-identification method.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(2)    Summary of Significant Accounting Policies (continued)

Office Properties and Equipment

    Land is carried at cost. Office properties, land and building improvements, furniture and equipment, and leasehold improvements are carried at cost, less accumulated depreciation and amortization. Depreciation and amortization of office properties and equipment is computed on a straight-line basis over their estimated useful lives (generally 40 years for buildings, 10 years to 20 years for land and building improvements, 3 years to 10 years for furniture and equipment). Leasehold improvements, carried at cost, net of accumulated depreciation, are amortized over the terms of the related leases or the estimated useful lives of the assets, whichever is shorter. Major improvements are capitalized, while repairs and maintenance costs are charged to expense as incurred. Upon retirement or sale, any gain or loss is recognized as incurred. At December 31, 2020 and 2019, land and buildings include property acquired from Stewardship with a fair value of $1.9 million and $1.8 million which is held-for-sale.

Bank-owned Life Insurance ("BOLI")

    Bank-owned life insurance is accounted for using the cash surrender value method and is recorded at its net realizable value. The change in the net asset value is recorded as a component of non-interest income. A deferred liability has been recorded for the estimated cost of post-retirement life insurance benefits accruing to applicable employees and directors covered by an endorsement split-dollar life insurance arrangement.

Goodwill and Intangible Assets

    Intangible assets of the Bank consist of goodwill, core deposit intangibles and mortgage servicing rights. Goodwill represents the excess of the purchase price over the fair value of net assets acquired in purchase acquisitions. In accordance with GAAP, goodwill with an indefinite useful life is not amortized, but is evaluated for impairment on an annual basis, or more frequently if events or changes in circumstances indicate potential impairment between annual measurement dates. As permitted by GAAP, the Company prepares a qualitative assessment in determining whether goodwill may be impaired. The factors considered in the assessment include macroeconomic conditions, industry and market conditions and overall financial performance of the Company, among others. The Company completed its annual goodwill impairment test as of December 31, 2020 based upon its qualitative assessment of goodwill and concluded that goodwill was not impaired and no further quantitative analysis was warranted.

    Core deposit intangibles represent the balance of the core deposit intangibles ascribed to the value of deposits acquired by the Bank through the acquisition of Stewardship.

    Mortgage servicing rights are recorded when purchased or when originated mortgage loans are sold, with servicing rights retained. Mortgage servicing rights are amortized on an accelerated method based upon the estimated lives of the related loans, and generally adjusted for prepayments. Mortgage servicing rights are carried at the lower of amortized cost or fair value.

Leases

The Company determines if an arrangement is a lease at inception. The Company's leases primarily relate to real estate property for branches and office space. All the Company's leases are classified as operating leases and the related right-of-use asset ("ROU") and lease liability are included in other assets and other liabilities, respectively on the Consolidated Statements of Financial Condition.

ROU assets represent the Company’s right to use an underlying asset for the lease term, and lease liabilities represent the Company’s obligation to make lease payments arising from the lease arrangements. The calculated amounts of the ROU asset and lease liabilities are impacted by the length of the lease term and the discount rate used to calculate the present value of minimum lease payments. As the Company's leases do not provide an implicit rate, the discount rate used in determining the lease liability for each individual lease is the Company's incremental borrowing rate. The present value of the lease liability may include the impact of options to extend or terminate the lease when it is reasonably certain that the Company will exercise such options provided in the lease terms. Lease expense is recognized on a straight-line basis over the expected lease term. Lease agreements that include lease and non-lease components, such as common area maintenance charges, are accounted for separately.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(2)    Summary of Significant Accounting Policies (continued)

Post-retirement Benefits

    The Company provides certain health care and life insurance benefits to eligible retired employees under a Post-retirement Plan, along with a split-dollar BOLI death benefit. The Company accrues the cost of retiree health care and other benefits during the employees’ period of active service. Effective January 1, 2019, the Post-retirement plan has been closed to new hires.

    Effective January 1, 2019, the Company implemented ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Post-retirement Benefit Cost. Under this ASU, the FASB requires employers to report the service cost component in the same line item as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net periodic benefit cost are required to be presented in the Consolidated Statements of Income separately from the service cost component. This ASU is also required to be applied retrospectively to all periods presented.

Employee Benefit Plans

    The Company maintains a single-employer tax-qualified defined benefit pension plan (the "Pension Plan") which covers full-time employees that satisfy the Pension Plan eligibility requirements. Effective October 1, 2018, employees hired by the Bank are not eligible to participate in the Company's Pension Plan as the plan has been closed to new employees as of that date.

    The Company's policy is to fund at least the minimum contribution required by the Employee Retirement Income Security Act of 1974. GAAP requires an employer to: (a) recognize in its statement of financial position the over-funded or under-funded status of a defined benefit post-retirement plan measured as the difference between the fair value of plan assets and the benefit obligation; (b) measure a plan’s assets and its obligations that determine its funded status at the end of the employer’s fiscal year (with limited exceptions); and (c) recognize as a component of other comprehensive income (loss), net of tax, the actuarial gains and losses and the prior service costs and credits that arise during the period. The assets of the plan are primarily invested in fixed income and equity funds.

    The Company has a retirement income maintenance plan (the "RIM Plan") which is a non-qualified defined benefit plan which provides benefits to all employees of the Company if their benefits under the Pension Plan are limited by the Internal Revenue Code.

    The Company has a 401(k) plan covering substantially all employees of the Company. The Company may match a percentage of the first 3.00% to 4.50% contributed by participants. The Company's matching contribution, if any, is determined by the Board of Directors in its sole discretion.

    The Company has an Employee Stock Ownership Plan ("ESOP"). The funds borrowed by the ESOP from the Company to purchase the Company's common stock are being repaid from the Bank's contributions over a period of 20 years. The Company's common stock not allocated to participants is recorded as a reduction of stockholders' equity at cost. Compensation expense for the ESOP is based on the average price of the Company's stock and the amount of shares committed to be allocated during each period.

    The Company has a Supplemental Executive Retirement Plan ("SERP"). The SERP is a non-qualified plan which provides supplemental retirement benefits to eligible officers (those designated by the Board of Directors) of the Company who are prevented from receiving the full benefits contemplated by the ESOP's benefit formulas under tax law limits for tax-qualified plans. In addition, the Company maintains a stock based deferral plan (the "Stock Based Deferral Plan") for certain executives and directors. The Company records a deferred compensation equity account and corresponding contra-equity account for the cost of the shares held by the Stock Based Deferral and SERP Plans.

    The Company also maintains a non-qualified savings income maintenance deferred compensation plan (the "SIM Plan") that provides supplemental benefits to certain executives who are prevented from receiving the full benefits contemplated by the 401(k) Plan under tax law limits for tax-qualified plans, and a Deferred Compensation Plan for directors.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(2)    Summary of Significant Accounting Policies (continued)

Derivatives

    The Company uses derivative financial instruments as components of its market risk management, principally to manage interest rate risk. Certain derivatives are entered into in connection with transactions with commercial customers. Derivatives are not used for speculative purposes. All derivatives are recognized as either assets or liabilities in the Consolidated Statements of Financial Condition, reported at fair value and presented on a gross basis. Until a derivative is settled, a favorable change in fair value results in an unrealized gain that is recognized as an asset, while an unfavorable change in fair value results in an unrealized loss that is recognized as a liability.

    The Company generally applies hedge accounting to its derivatives used for market risk management purposes. Hedge accounting is permitted only if specific criteria are met, including a requirement that a highly effective relationship exists between the derivative instrument and the hedged item, both at inception of the hedge and on an ongoing basis. Changes in the fair value of effective fair value hedges are recognized in current earnings (with the change in fair value of the hedged asset or liability also recognized in earnings). Changes in the fair value of effective cash flow hedges are recognized in other comprehensive income (loss) until earnings are affected by the variability in cash flows of the designated hedged item. Ineffective portions of hedge results are recognized in current earnings. Changes in the fair value of derivatives for which hedge accounting is not applied are recognized in current earnings.

The Company formally documents at inception all relationships between the derivative instruments and the hedged items, as well as its risk management objectives and strategies for undertaking the hedge transactions. This process includes linking all derivatives that are designated as hedges to specific assets and liabilities, or to specific firm commitments. The Company also formally assesses, both at inception of the hedge and on an ongoing basis, whether the derivatives that are used in hedging transactions are highly effective in offsetting changes in the fair values or cash flows of the hedged items. If it is determined that a derivative is not highly effective or has ceased to be a highly effective hedge, the Company would discontinue hedge accounting prospectively. Gains or losses resulting from the termination of a derivative accounted for as a cash flow hedge remain in other comprehensive income (loss) and is (accreted) amortized to earnings over the remaining period of the former hedging relationship.

Certain derivative financial instruments are offered to certain commercial banking customers to manage their risk of exposure and risk management strategies. These derivative instruments consist primarily of currency forward contracts and interest rate swap contracts. The risks associated with these transactions is mitigated by simultaneously entering into similar transactions having essentially offsetting terms with a third party. In addition, the Company executes interest rate swaps with third parties in order to hedge the interest rate risk of short-term FHLB advances.

Income Taxes

    The Company and its subsidiaries file consolidated federal income tax returns. Federal income taxes are allocated to each entity based on their respective contributions to taxable income of the consolidated income tax returns. Beginning in 2019 as required by the State of New Jersey, the Company adopted combined income tax reporting for certain members of a commonly-controlled unitary business group. Prior to 2019, separate state income tax returns were filed for the Company and each of its qualifying subsidiaries.

    The Company records income taxes in accordance with ASC Topic 740, Income Taxes, using the asset and liability method. The amounts reflected on the Company's federal and state income tax returns differ from these provisions due principally to temporary differences in the reporting of certain items for consolidated financial statement reporting and income tax reporting purposes. Accordingly, deferred tax assets and liabilities: (i) are recognized for the expected future tax consequences of events that have been recognized in the financial statements or tax returns; (ii) are attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases; and (iii) are measured using enacted tax rates expected to apply in the years when those temporary differences are expected to be recovered or settled. Where applicable, deferred tax assets are reduced by a valuation allowance for any portions determined not likely to be realized. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income tax expense in the period that includes the enactment date. The valuation allowance is adjusted, by a charge or credit to income tax expense, as changes in facts and circumstances warrant.

    The Company did not have any liabilities for uncertain tax positions or any known unrecognized tax benefits at December 31, 2020 and 2019. The Company recognizes interest and penalties related to unrecognized tax benefits in income tax expense in the Consolidated Statements of Income. The Company did not recognize any interest and penalties during the years ended December 31, 2020, 2019 and 2018.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(2)    Summary of Significant Accounting Policies (continued)

Income Taxes (continued)

On July 1, 2018, New Jersey enacted legislation which adds to the state’s 9.0% Corporation Business Tax rate (i) a 2.5% surtax for periods beginning in 2018 and 2019 and (ii) a 1.5% surtax for periods beginning in 2020 and 2021. Subsequently, on September 12, 2020, New Jersey enacted legislation that restored and extended the 2.5% Corporation Business Tax surcharge to apply retroactively from January 1, 2020 through December 31, 2023. These surtaxes apply to corporations with more than $1.0 million of net income allocated to New Jersey. In addition, for periods beginning in 2019, as previously noted, New Jersey adopted combined income tax reporting for certain members of a commonly-controlled unitary business group, and issued guidance in December 2019 to clarify business entities to be included and excluded from this combined group.

Comprehensive Income (Loss)

    Comprehensive income (loss) consists of net income and other comprehensive income (loss). Other comprehensive income (loss) includes items recorded in equity, such as unrealized gains and losses on debt securities available for sale, the noncredit component of other than temporary impairment losses on debt securities, unrealized gains and losses on derivatives, and the unfunded status and reclassification of actuarial net (loss) gain associated with the Company's benefit plans. Comprehensive income is presented in a separate Consolidated Statement of Comprehensive Income (Loss).

Segment Reporting

    The Company’s operations are substantially in the financial services industry and include providing traditional banking and other financial services to its customers. The Company operates primarily in New Jersey. Management makes operating decisions and assesses performance based on an ongoing review of the Company’s consolidated financial results. Therefore, the Company has a single operating segment for financial reporting purposes.

Earnings Per Share ("EPS")

    Basic EPS is computed by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the period. For purposes of calculating basic EPS, weighted average common shares outstanding excludes treasury stock, unallocated employee stock ownership plan shares that have not been committed for release and deferred compensation obligations required to be settled in shares of Company stock.

Diluted EPS is computed using the same method as basic EPS and reflects the potential dilution which could occur if stock options and unvested shares were exercised and converted into common stock. The potentially diluted shares would then be included in the weighted average number of shares outstanding for the period using the treasury stock method. Shares issued and reacquired during any period are weighted for the portion of the period that they were outstanding.

Stock Compensation Plans

    Compensation expense related to stock options and non-vested restricted stock awards is based on the fair value of the award on the measurement date with expense recognized on a straight line basis over the requisite performance or service period. The fair value of stock options is estimated utilizing the Black-Scholes option pricing model. The fair value of non-vested restricted stock awards is generally the closing market price of the Company's common stock on the date of grant. The Company accounts for forfeitures as they occur.

Recent Accounting Pronouncements

    As an “emerging growth company” as defined in Title 1 of the Jumpstart Our Business Startups (JOBS) Act prior to December 31, 2019, the Company elected to use the extended transition period to delay the adoption of new or reissued accounting pronouncements applicable to public companies until such pronouncements were made applicable to private companies.

    Accounting Pronouncements Adopted

In October 2018, the FASB issued ASU No. 2018-16, Derivatives and Hedging (Topic 815)- Inclusion of the Secured Overnight Financing Rate ("SOFR") Overnight Index Swap ("OIS") Rate as a Benchmark Interest Rate for Hedge Accounting Purposes. This ASU permits the use of the OIS rate based upon SOFR as a U.S. benchmark interest rate for hedge accounting

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Notes to Consolidated Financial Statements

(2)    Summary of Significant Accounting Policies (continued)

Recent Accounting Pronouncements (cont'd)

Accounting Pronouncements Adopted (continued)

purposes under Topic 815 in addition to the direct Treasury obligations of the U.S. Government, the LIBOR swap rate, the OIS rate based on the Fed Funds Effective Rate, and the Securities Industry and Financial Markets Association Municipal Swap Rate.

The amendments in this ASU are required to be adopted concurrently with the amendments in ASU No. 2017-12, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities, which was issued in August 2017. The effective date for this ASU for the Company is for fiscal years beginning after December 15, 2019, with early adoption, including adoption in an interim period permitted. The amendments should be adopted on a prospective basis for qualifying new or redesignated hedging relationships entered into on or after date of adoption. The Company adopted this guidance effective January 1, 2020. The adoption of this ASU did not have a material impact on the Company's consolidated financial statements.

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement. The purpose of this updated guidance is to improve the effectiveness and disclosures in the notes to the consolidated financial statements. The ASU removes the requirement to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy; removes the policy for timing of transfers between levels; and removes the disclosure related to the valuation process for Level 3 fair value measurements. The ASU also modifies existing disclosure requirements which relate to the disclosure for investments in certain entities which calculate net asset value and clarifies the disclosure about uncertainty in the measurements as of the reporting date. For all entities, the effective date for this guidance is fiscal years beginning after December 15, 2019, including interim periods within the reporting period, with early adoption permitted. Entities are also allowed to elect early adoption of the eliminated or modified disclosure requirements and delay adoption of the new disclosure requirements until their effective date. The Company adopted this guidance effective January 1, 2020. The adoption of this ASU did not have a material impact on the Company's consolidated financial statements.

In March 2017, the FASB issued ASU No. 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities. This guidance shortens the amortization period for premiums on callable debt securities by requiring that premiums be amortized to the first (or earliest) call date instead of as an adjustment to the yield over the contractual life. This change more closely aligns the accounting with the economics of a callable debt security and the amortization period with expectations that already are included in market pricing on callable debt securities. This guidance does not change the accounting for discounts on callable debt securities, which will continue to be amortized to the maturity date. This guidance includes only instruments that are held at a premium and have explicit call features. It does not include instruments that contain prepayment features, such as mortgage backed securities; nor does it include call options that are contingent upon future events or in which the timing or amount to be paid is not fixed. The effective date for this ASU for the Company is fiscal years beginning after December 15, 2019, including interim periods within the reporting period, with early adoption permitted. Transition is

on a modified retrospective basis with an adjustment to retained earnings as of the beginning of the period of adoption. The Company

adopted this guidance effective January 1, 2020. The adoption of this ASU did not have a material impact on the Company's consolidated financial statements.

    In January 2017, the FASB issued ASU No. 2017-04, Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. The main objective of this guidance is to simplify the accounting for goodwill impairment by requiring that impairment charges be based upon the first step in the current two-step impairment test under ASC 350. Currently, if the fair value of a reporting unit is lower than its carrying amount (Step 1), an entity calculates any impairment charge by comparing the implied fair value of goodwill with its carrying amount (Step 2). The implied fair value of goodwill is calculated by deducting the fair value of all assets and liabilities of the reporting unit from the reporting unit’s fair value as determined in Step 1. To determine the implied fair value of goodwill, entities estimate the fair value of any unrecognized intangible assets and any corporate-level assets or liabilities that were included in the determination of the carrying amount and fair value of the reporting unit in Step 1. Under this guidance, if a reporting unit’s carrying amount exceeds its fair value, an entity will record an impairment charge based on that difference. The impairment charge will be limited to the amount of goodwill allocated to that reporting unit. This guidance eliminates the requirement to calculate a goodwill impairment charge using Step 2. This guidance does not change the guidance on completing Step 1 of the goodwill impairment test. Under this guidance, an entity will still be able to perform the current optional qualitative goodwill impairment assessment before determining whether to proceed to Step 1. The guidance in the ASU was applied prospectively and is effective for the Company for annual and interim impairment tests performed in periods beginning after December 15, 2019. The Company adopted this guidance effective January 1, 2020. The adoption of this ASU did not have a material impact on the Company's consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). This guidance requires all lessees to recognize a lease liability and a right-of-use asset, measured at the present value of the future minimum lease payments, at the lease

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Notes to Consolidated Financial Statements

(2)    Summary of Significant Accounting Policies (continued)

Recent Accounting Pronouncements (cont'd)

Accounting Pronouncements Adopted (continued)

commencement date for leases classified as operating leases as well as finance leases. The update also requires new quantitative disclosures related to leases in the Company's consolidated financial statements. There are also practical expedients in this update related to leases that commenced before the effective date, initial direct costs and the use of hindsight to extend or terminate a lease or purchase a leased asset. Lessor accounting remains largely unchanged under this new guidance. In January 2018, the FASB issued ASU 2018-01, Leases (Topic 842)-Land Easement Practical Expedient for Transition to Topic 842, which provides an optional practical expedient to not evaluate land easements which were existing or expired before the adoption of Topic 842 that were not accounted for as leases under Topic 840. In July 2018, the FASB issued ASU 2018-10, Codification Improvements to Topic 842, Leases and ASU 2018-11, Leases (Topic 842) -Targeted Improvements which provides entities with an optional transition method under which comparative periods presented in the financial statements will continue to be in accordance with current Topic 840, Leases, and a practical expedient to not separate non-lease components from the associated lease component. The guidance is effective for the Company for annual periods beginning after December 15, 2019, including interim periods within that reporting period. In the evaluation of this guidance, the Company identified the inventory of leases and actively accumulated the requisite lease data necessary to apply the guidance. The Company selected a software platform to support the recording, accounting and disclosure requirements of the new lease guidance. Upon adoption, the Company recorded a right-of-use asset and lease liability as of January 1, 2020. See note 9 for more information regarding adoption.

In March 2017, the FASB issued ASU No. 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Post-retirement Benefit Cost, which requires that companies disaggregate the service cost component from other components of net benefit cost. This update calls for companies that offer post-retirement benefits to present the service cost, which is the amount an employer has to set aside each quarter or fiscal year to cover the benefits, in the same line item with other current employee compensation costs. Other components of net benefit cost will be presented in the income statement separately from the service costs component and outside the subtotal of income from operations, if one is presented. The effective date for this ASU for the Company is fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company adopted this guidance effective January 1, 2019. See note 14 for additional disclosure regarding the impact of adoption of this ASU on the Company's consolidated financial statements.

In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, a new standard which addresses diversity in practice related to eight specific cash flow issues: debt prepayment or extinguishment costs, settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies (including bank-owned life insurance policies), distributions received from equity method investees, beneficial interests in securitization transactions and separately identifiable cash flows and application of the predominance principle. This guidance in the ASU is effective for the Company for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Entities will apply the standard’s provisions using a retrospective transition method to each period presented. If it is impracticable to apply the amendments retrospectively for some of the issues, the amendments for those issues would be applied prospectively as of the earliest date practicable. The Company adopted this guidance effective January 1, 2019. The adoption of this ASU did not have a material impact on the Company's consolidated financial statements.

    In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments- Overall: Recognition and Measurement of Financial Assets and Financial Liabilities. This guidance requires an entity to: (i) measure equity investments at fair value through net income, with certain exceptions; (ii) present in other comprehensive income the changes in instrument-specific credit risk for financial

liabilities measured using the fair value option; (iii) present financial assets and financial liabilities by measurement category and form of financial asset; (iv) calculate the fair value of financial instruments for disclosure purposes based on an exit price; and (v) assess a valuation allowance on deferred tax assets related to unrealized losses on available-for-sale debt securities in combination with other deferred tax assets. This guidance provides an election to subsequently measure certain non-marketable equity investments at cost less any impairment and adjusted for certain observable price changes. The guidance also requires a qualitative impairment assessment of such equity investments and amends certain fair value disclosure requirements.

    The Company adopted this guidance effective January 1, 2019. As a result, $1.9 million of equity securities, as of December 31, 2018, were reclassified from securities available for sale, and presented as a separate line item on the Consolidated Statements of Financial Condition. The $548,000 after tax unrealized gain on these securities, at time of adoption, was reclassified from other comprehensive income (loss) to retained earnings, and is reflected in the consolidated statements of changes in stockholders' equity. For financial instruments that are measured at amortized cost, the Company measures fair value utilizing an exit price methodology.

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Notes to Consolidated Financial Statements

(2)    Summary of Significant Accounting Policies (continued)

Recent Accounting Pronouncements (cont'd)

Accounting Pronouncements Adopted (continued)

See note 17 for additional disclosure regarding the impact of adoption of this ASU on the Company's consolidated financial statements.

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers. The objective of this amendment is to clarify the principles for recognizing revenue and to develop a common revenue standard for U.S. GAAP. This update affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of non-

financial assets unless those contracts are in the scope of other standards. The guidance in the ASU was effective for the Company for fiscal years beginning after December 15, 2018. Subsequently, the FASB issued various amendments that were intended to improve and clarify the implementation guidance of ASU No. 2014-09 and had the same effective date as the original guidance. The Company's revenue is primarily comprised of net interest income on interest earning assets and liabilities and non-interest income. The scope of guidance explicitly excludes net interest income as well as other revenues associated with financial assets and liabilities, including loans, leases, securities and derivatives. The Company adopted this guidance effective January 1, 2019, after completing an evaluation of the Company's revenue streams and applicable revenue recognition, and concluded that there are no material changes related to the timing or amount of revenue recognition. The adoption of this guidance did not have a significant impact on the Company's consolidated financial statements, but resulted in additional footnote disclosures, including the disaggregation of certain categories of revenues. See note 23 for additional disclosure regarding the impact of adoption of this ASU on the Company's consolidated financial statements.

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Notes to Consolidated Financial Statements

(3)     Acquisitions

Stewardship Financial Corporation

    On November 1, 2019, the Company completed its acquisition of Stewardship Financial Corporation ("Stewardship"), pursuant to the Agreement and Plan of Merger, dated as of June 6, 2019, (the "Merger Agreement"). Under the terms of the merger agreement, each outstanding share of Stewardship common stock was converted into the right to receive $15.75 in cash at the effective time of the merger. At the time of closing, Stewardship had $956.0 million in total assets, including $756.9 million in net loans receivable, $52.6 million in securities, and $877.8 million in total liabilities, including $781.4 million in deposits and $81.8 million in borrowings. The deposits initially acquired from Stewardship were held across a network of 12 branches located in New Jersey throughout Bergen, Morris, and Passaic counties. During the year ended December 31, 2020, four of these branches were closed, and the Bank recorded a loss of $770,000 related to these branch closures.

    Merger-related expenses are recorded in the Consolidated Statements of Income and are expensed as incurred. Direct acquisition and other charges incurred in connection with the Stewardship acquisition totaled $1.3 million and $2.8 million for the years ended December 31, 2020 and 2019, respectively.

    The following table sets forth assets acquired and liabilities assumed in the Stewardship acquisition, at their estimated fair values as of the closing date of the transaction:

	November 1, 2019
Assets acquired:
Cash and cash equivalents	$	105,006
Debt securities available for sale	51,710
Equity securities	1,073
Federal Home Loan Bank stock	3,716
Loans receivable	757,223
Accrued interest receivable	2,239
Office properties and equipment, net	6,815
Bank-owned life insurance	22,096
Deferred tax assets, net	3,534
Core deposit and other intangibles	7,467
Other assets	767
Total assets acquired	$	961,646
Liabilities assumed:
Deposits	$	782,698
Borrowings	82,761
Advance payments by borrowers for taxes and insurance	356
Accrued expenses and other liabilities	14,584
Total liabilities assumed	$	880,399
Net assets acquired	$	81,247
Cash paid for purchase	136,294
Goodwill recorded at merger	$	55,047

The assets acquired and liabilities assumed have been accounted for under the acquisition method of accounting. The assets and liabilities were recorded at their fair values as of November 1, 2019, and resulted in the recognition of goodwill of $55.0 million and a core deposit intangible of $7.5 million. The determination of the fair value of assets acquired and liabilities assumed required management to make estimates about discount rates, future expected cash flows, market conditions, and other future events that are highly subjective in nature and subject to change. The fair value estimates were subject to change for up to one year after the closing date of the transaction if additional information (existing at the date of closing) relative to closing date fair values became available. During the year ended December 31, 2020, the Company determined that there were no material adjustments required to be recorded to amounts as of November 1, 2019.

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Notes to Consolidated Financial Statements

(3)     Acquisitions (continued)

Roselle Bank

On April 1, 2020, the Company completed its acquisition of RSB Bancorp, MHC, RSB Bancorp, Inc. and Roselle Bank (collectively, the "Roselle Entities" or "Roselle"). Pursuant to the terms of the Merger Agreement, RSB Bancorp, MHC merged with and into the MHC, with the MHC as the surviving entity; RSB Bancorp, Inc. merged with and into Columbia Financial, with Columbia Financial as the surviving entity; and Roselle Bank merged with and into the Bank, with the Bank as the surviving institution. Under the terms of the merger agreement, depositors of Roselle Bank became depositors of the Bank and have the same rights and privileges in the MHC as if their accounts had been established at the Bank on the date established at Roselle Bank. The Company issued 4,759,048 shares of its common stock to the MHC, representing an amount equal to the fair value of the Roselle Entities as determined by an independent appraiser, at the effective time of the merger.

Merger-related expenses are recorded in the Consolidated Statements of Income and are expensed as incurred. Direct acquisition and other charges incurred in connection with the Roselle acquisition totaled $597,000 for the year ended December 31, 2020. There were no expenses related to this merger recorded for the year ended December 31, 2019.

    The following table sets forth assets acquired and liabilities assumed in the Stewardship acquisition, at their estimated fair values as of the closing date of the transaction:

	April 1, 2020
Assets acquired:
Cash and cash equivalents	$	155,248
Debt securities available for sale	51,479
Debt securities held to maturity	13,418
Equity securities	1,796
Federal Home Loan Bank stock	2,010
Loans receivable	171,593
Accrued interest receivable	679
Office properties and equipment, net	5,774
Bank-owned life insurance	17,245
Deferred tax assets, net	1,334
Other assets	1,489
Total assets acquired	$	422,065
Liabilities assumed:
Deposits	$	333,234
Borrowings	37,728
Advance payments by borrowers for taxes and insurance	982
Accrued expenses and other liabilities	5,400
Total liabilities assumed	$	377,344
Net assets acquired	$	44,721
Fair market value of stock issued to Columbia Bank MHC for purchase	68,530
Goodwill recorded at merger	$	23,809

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(3)     Acquisitions (continued)    

Roselle Bank (continued)

The assets acquired and liabilities assumed have been accounted for under the acquisition method of accounting. The assets and liabilities were recorded at their fair values as of April 1, 2020, and resulted in the recognition of goodwill of $23.8 million. The determination of the fair value of assets acquired and liabilities assumed required management to make estimates about discount rates, future expected cash flows, market conditions, and other future events that are highly subjective in nature and subject to change. The fair value estimates are subject to change for up to one year after the closing date of the transaction if additional information (existing at the date of closing) relative to closing date fair values becomes available. During the fourth quarter of 2020, the Company completed all tax returns related to the operation of the acquired entity and its impact on the Company's income taxes, which resulted in a $5.1 million adjustment to deferred income taxes, net, and a decrease in goodwill. At December 31, 2020, goodwill related to the Roselle acquisition totaled $18.7 million. As the Company continues to analyze the acquired assets and assumed liabilities, there may be adjustments to the recorded carrying values through April 1, 2021.

Fair Value Measurement of Assets Acquired and Liabilities Assumed

    Described below are the methods used to determine the fair values of the significant assets acquired and liabilities assumed in the Stewardship and Roselle acquisitions:

    Cash and cash equivalents. The estimated fair values of cash and cash equivalents approximate their stated face amounts, as these financial instruments are either due on demand or have short-term maturities.

Debt securities available for sale. The estimated fair values of the debt securities were calculated utilizing Level 2 inputs. The majority of the acquired securities were fixed income instruments that are not quoted on an exchange, but are traded in active markets. The prices for these instruments are obtained through an independent pricing service when available, or dealer market participants with whom the Company has historically transacted with for both purchases and sales of securities. The prices are derived from market quotations and matrix pricing. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, and the bond's terms and conditions, among other things. Management reviewed the data and assumptions used in pricing securities by its third party provider to ensure the highest level of significant inputs are derived from market observable data.

    Loans receivable. The acquired loan portfolio was segregated into pools for valuation purposes primarily based on loan type, non-accrual status, and credit risk rating. The estimated fair values were computed by discounting the expected cash flows from the respective pools. Cash flows were estimated by using valuation models that incorporated estimates of current key assumptions such as prepayment speeds, default rates, and loss severity rates. The process included: (1) projecting monthly principal and/or interest cash flows based on the contractual terms of the loans, including both maturity and contractual amortization; (2) adjusting projected cash flows for expected losses and prepayments, where appropriate; (3) developing a discount rate based on the relative risk of the cash flows, considering the loan type, liquidity risk, the maturity of the loans, servicing costs, and a required return on capital; and (4) discounting the projected cash flows to a present value, to arrive at the calculated value of the loans.

    The methods used to estimate the fair values of loans are extremely sensitive to the assumptions and estimates used. While management attempted to use assumptions and estimates that best reflected the acquired loan portfolios and current market conditions, a greater degree of subjectivity is inherent in the values than in those determined in active markets.

    Office properties and equipment, net. The fair value of land and buildings was estimated using current appraisals. Acquired equipment was not material. Buildings are amortized over their estimated useful lives. Leasehold improvements and equipment are amortized or depreciated over their estimated useful lives usually ranging for 3 years to 10 years.

    Goodwill and intangible assets. Goodwill is not amortized for book purposes: however: it is reviewed at least annually for impairment and is not deductible for tax purposes. Intangible assets recognized in the Stewardship acquisition consisting of core deposit intangibles ("CDI") are the measures of the value of non-maturity deposits in a business combination. The fair value of the CDI was calculated utilizing the cost savings approach, the expected cost savings attributable to the core deposits funding relative to an alternative source of funding, using a discounted cash flow present value methodology. Key inputs and assumptions utilized in the discounted cash flow present value methodology include core deposit balances and rates paid, the cost of an additional funding source, the aggregate life of deposits and truncation points, non-interest deposit costs, and the immediate deposit outflow assumption. The CDI is amortized over an estimated useful life of 10 years to approximate the existing deposit relationships acquired.

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Notes to Consolidated Financial Statements

(3)     Acquisitions (continued)    

Fair Value Measurement of Assets Acquired and Liabilities Assumed (continued)

    Deposits. The fair values of deposit liabilities with no stated maturity (i.e., non-interest bearing and interest-bearing demand deposit accounts, money market and savings and club accounts) are equal to the carrying amounts payable on demand. The fair value of certificates of deposit represent contractual cash flows, discounted to present value using interest rates currently offered on deposits with similar characteristics and remaining maturities.

    Borrowings. The fair values of borrowings consisting of FHLB advances were estimated by discounting future cash flows using market discount rates for borrowings with similar characteristics, terms and remaining maturities. The fair value of other borrowings recognized in the Stewardship acquisition, which included subordinated notes and debentures, were measured at the acquisition date using a dealer market quote.

(4)     Debt Securities Available for Sale

    Debt securities available for sale at December 31, 2020 and 2019 are summarized as follows:

	December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
			(In thousands)
U.S. government and agency obligations	$	24,425	$	1,124	$	—	$	25,549
Mortgage-backed securities and collateralized mortgage obligations	1,163,613		37,343		(562)		1,200,394
Municipal obligations	16,845		17		—		16,862
Corporate debt securities	67,628		2,264		(415)		69,477
Trust preferred securities	5,000		—		(330)		4,670
	$	1,277,511	$	40,748	$	(1,307)	$	1,316,952

	December 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
			(In thousands)
U.S. government and agency obligations	$	42,081	$	321	$	(16)	$	42,386
Mortgage-backed securities and collateralized mortgage obligations	968,165		12,981		(1,265)		979,881
Municipal obligations	2,284		1		(1)		2,284
Corporate debt securities	68,613		945		(378)		69,180
Trust preferred securities	5,000		—		(395)		4,605
	$	1,086,143	$	14,248	$	(2,055)	$	1,098,336

    The amortized cost and fair value of debt securities available for sale at December 31, 2020, by contractual final maturity, is shown below. Expected maturities may differ from contractual maturities due to prepayment or early call options exercised by the issuer.

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Notes to Consolidated Financial Statements

(4)     Debt Securities Available for Sale (continued)

	December 31, 2020
	Amortized Cost		Fair Value
	(In thousands)
One year or less	$	21,378	$	21,380
More than one year to five years	47,429		49,276
More than five years to ten years	45,091		45,902
	$	113,898	$	116,558
Mortgage-backed securities and collateralized mortgage obligations	1,163,613		1,200,394
	$	1,277,511	$	1,316,952

    Mortgage-backed securities and collateralized mortgage obligations totaling $1.2 billion at amortized cost, and $1.2 billion at fair value, are not classified by maturity in the table above as their expected lives are likely to be shorter than the contractual maturity date due to principal prepayments.

During the year ended December 31, 2020, proceeds from the sale of debt securities available for sale totaled $20.8 million, resulting in $369,000 of gross gains and no gross losses. During the year ended December 31, 2020, proceeds from called debt securities available for sale totaled $11.6 million resulting in $1,000 of gross gains and no gross losses. During the year ended December 31, 2020, proceeds from matured debt securities available for sale totaled $10.9 million.

    During the year ended December 31, 2019, proceeds from the sale of debt securities available for sale totaled $65.2 million, resulting in $2.2 million of gross gains and $22,000 of gross losses. During the year ended December 31, 2019, proceeds from called debt securities available for sale totaled $24.1 million resulting in $174,000 of gross gains and no gross losses. During the year ended December 31, 2019, proceeds from one matured debt security available for sale totaled $797,000.

    During the year ended December 31, 2018, proceeds from the sale of debt securities available for sale totaled $11.5 million, resulting in $116,000 of gross gains and no gross losses. During the year ended December 31, 2018, proceeds from matured debt securities available for sale totaled $2.4 million.

    Debt securities available for sale having a carrying value of $822.2 million and $462.0 million, at December 31, 2020 and 2019, respectively, were pledged as security for public funds on deposit at the Bank as required and permitted by law, pledged for outstanding borrowings at the Federal Home Loan Bank, and pledged for potential borrowings at the Federal Reserve Bank of New York.

    The following tables summarize the fair value and gross unrealized losses of those securities that reported an unrealized loss at December 31, 2020 and 2019 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	December 31, 2020
	Less Than 12 Months				12 Months or Longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
Mortgage-backed securities and collateralized mortgage obligations	$	117,978	$	(481)	$	24,018	$	(81)	$	141,996	$	(562)
Corporate debt securities	9,845		(155)		5,740		(260)		15,585		(415)
Trust preferred securities	—		—		4,670		(330)		4,670		(330)
	$	127,823	$	(636)	$	34,428	$	(671)	$	162,251	$	(1,307)

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Notes to Consolidated Financial Statements

(4)     Debt Securities Available for Sale (continued)

	December 31, 2019
	Less Than 12 Months				12 Months or Longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
U.S. government and agency obligations	$	5,106	$	(13)	$	4,988	$	(3)	$	10,094	$	(16)
Mortgage-backed securities and collateralized mortgage obligations	178,665		(946)		58,208		(319)		236,873		(1,265)
Municipal obligations	696		(1)		—		—		696		(1)
Corporate debt securities	2,588		(5)		4,627		(373)		7,215		(378)
Trust preferred securities	—		—		4,605		(395)		4,605		(395)
	$	187,055	$	(965)	$	72,428	$	(1,090)	$	259,483	$	(2,055)

    The Company evaluates securities for other-than-temporary impairment at each reporting period and more frequently when economic or market conditions warrant such evaluation. The temporary loss position associated with debt securities available for sale was the result of changes in market interest rates relative to the coupon of the individual security and changes in credit spreads. The Company does not have the intent to sell securities in a temporary loss position at December 31, 2020, nor is it more likely than not that the Company will be required to sell the securities before the anticipated recovery.

    The number of securities in an unrealized loss position at December 31, 2020 totaled 40, compared with 97 at December 31, 2019. All temporarily impaired securities were investment grade as of December 31, 2020 and 2019.

    The Company did not record an other-than-temporary impairment charge on debt securities available for sale during the years ended December 31, 2020, 2019, and 2018.

(5)     Debt Securities Held to Maturity

    Debt securities held to maturity at December 31, 2020 and 2019 are summarized as follows:

	December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
	(In thousands)
U.S. government and agency obligations	$	5,000	$	1	$	—	$	5,001
Mortgage-backed securities and collateralized mortgage obligations	257,720		14,372		(2)		272,090
	$	262,720	$	14,373	$	(2)	$	277,091

	December 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
	(In thousands)
U.S. government and agency obligations	$	20,000	$	26	$	(66)	$	19,960
Mortgage-backed securities and collateralized mortgage obligations	265,756		4,048		(259)		269,545
	$	285,756	$	4,074	$	(325)	$	289,505

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(5)     Debt Securities Held to Maturity (continued)    

The amortized cost and fair value of debt securities held to maturity at December 31, 2020, by contractual final maturity, is shown below. Expected maturities may differ from contractual maturities due to prepayment or early call options exercised by the issuer.

	December 31, 2020
	Amortized Cost		Fair Value
	(In thousands)
More than one year to five years	$	5,000	$	5,001
Mortgage-backed securities and collateralized mortgage obligations	257,720		272,090
	$	262,720	$	277,091

    Mortgage-backed securities and collateralized mortgage obligations totaling $257.7 million at amortized cost, and $272.1 million at fair value at December 31, 2020, are not classified by maturity in the table above as their expected lives are likely to be shorter than the contractual maturity date due to principal prepayments.

During the year ended December 31, 2020, there were no sales of debt securities held to maturity. During the year ended December 31, 2020, proceeds from called debt securities held to maturity totaled $20.0 million. No gross gains or losses were recognized on the securities which were called.

There were no sales of debt securities held to maturity for the years ended December 31, 2019 and 2018. During the year ended December 31, 2019, proceeds from called debt securities held to maturity totaled $33.4 million, resulting in $24,000 of gross gains and no gross losses. During the year ended December 31, 2018, proceeds from calls and maturities of debt securities held to maturity totaled $5.4 million, resulting in no gross gains or losses.

    Debt securities held to maturity having a carrying value of $220.5 million and $236.0 million, at December 31, 2020 and December 31, 2019, respectively, were pledged as security for public funds on deposit at the Bank as required and permitted by law, pledged for outstanding borrowings at the Federal Home Loan Bank, and pledged for potential borrowings at the Federal Reserve Bank of New York.

    The following tables summarize the fair value and gross unrealized losses of those securities that reported an unrealized loss at December 31, 2020 and 2019 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	December 31, 2020
	Less Than 12 Months				12 Months or Longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
Mortgage-backed securities and collateralized mortgage obligations	$	2,176	$	(2)	$	—	$	—	$	2,176	$	(2)

110

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(5)     Debt Securities Held to Maturity (continued)

	December 31, 2019
	Less than 12 months				12 months or longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
U.S. government and agency obligations	$	9,934	$	(66)	$	—	$	—	$	9,934	$	(66)
Mortgage-backed securities and collateralized mortgage obligations	27,911		(251)		772		(8)		28,683		(259)
	$	37,845	$	(317)	$	772	$	(8)	$	38,617	$	(325)

    The Company evaluates securities for other-than-temporary impairment at each reporting period and more frequently when economic or market conditions warrant such evaluation. The temporary loss position associated with debt securities held to maturity was the result of changes in market interest rates relative to the coupon of the individual security and changes in credit spreads. The Company does not have the intent to sell securities in a temporary loss position at December 31, 2020, nor is it more likely than not that the Company will be required to sell the securities before the anticipated recovery.

    There were two securities in an unrealized loss position as of December 31, 2020, compared with 22 at December 31, 2019. All temporarily impaired securities were investment grade as of December 31, 2020 and 2019.

    The Company did not record an other-than-temporary impairment charge on debt securities held to maturity for the years ended December 31, 2020, 2019, and 2018.

(6)    Equity Securities at Fair Value

    The Company has an equity securities portfolio which consists of stock in other financial institutions, a payment technology company, a community bank correspondent services company, and preferred stock in U.S. Government agencies which are reported at fair value on the Company's Consolidated Statements of Financial Condition. The fair value of the equities portfolio at December 31, 2020 and 2019 was $5.4 million and $2.9 million, respectively.

    The Company adopted ASU 2016-01 on January 1, 2019, resulting in a $548,000 after tax cumulative-effect adjustment from other comprehensive income (loss) to retained earnings, as reflected in the Consolidated Statements of Changes in Stockholders' Equity. The Company recorded a net increase in the fair value of equity securities of $767,000 and $305,000 for the years ended December 31, 2020 and 2019, respectively, as a component of non-interest income.

During the years ended December 31, 2020, and 2018, there were no sales of equity securities. During the year ended December 31, 2019 proceeds from the sales of equity securities totaled $1.1 million, resulting in $236,000 of gross gains and no gross losses.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(7)     Loans Receivable and Allowance for Loan Losses

    Loans receivable at December 31, 2020 and 2019 are summarized as follows:

	December 31,
	2020		2019
	(In thousands)
Real estate loans:
One-to-four family	$	1,940,327	$	2,077,079
Multifamily and commercial	2,817,965		2,919,985
Construction	328,711		298,942
Commercial business loans	752,870		483,215
Consumer loans:
Home equity loans and advances	321,177		388,127
Other consumer loans	1,497		1,960
Total gross loans	6,162,547		6,169,308
Purchased credit-impaired loans	6,345		7,021
Net deferred loan costs, fees and purchased premiums and discounts	12,878		21,237
Loans receivable	$	6,181,770	$	6,197,566

    The Company had $4.1 million of SBA loans held-for-sale at December 31, 2020. The Company had no loans held-for-sale at December 31, 2019. During the year ended December 31, 2020, the Company sold $111.8 million of one-to-four family real estate loans held-for-sale, resulting in gross gains of $1.7 million and no gross losses. During the year ended December 31, 2019, the Company sold $97.4 million, $4.3 million, and $164,000 of one-to-four family real estate, fixed rate home equity loans, multifamily and commercial real estate and commercial business loans held-for-sale, respectively, resulting in gross gains of $718,000 and no gross losses. During the year ended December 31, 2018, the Company sold $3.6 million of one-to-four family real estate and fixed rate home equity loans, which resulted in no gross gains or losses.

    During the year ended December 31, 2020, the Company sold $15.1 million, $13.0 million, and $7.6 million of one-to-four family real estate, fixed rate home equity loans, construction loans and commercial business loans, respectively, included in loans receivable, resulting in gross gains of $161,000 and no gross losses. During the year ended December 31, 2019, the Company sold $5.3 million, $5.5 million, and $901,000 of one-to-four family real estate, fixed rate home equity loans, and multifamily and commercial real estate and commercial business loans, respectively, included in loans receivable, resulting in gross gains of $67,000 and no gross losses. During the year ended December 31, 2018, the Company sold $32.0 million of one-to-four family real estate and fixed rate home equity loans included in loans receivable, resulting in gross gains of $618,000 and no gross losses.

    During the year ended December 31, 2020, there were no loans purchased by the Company. During the years ended December 31, 2019 and 2018, the Company purchased $89.8 million of one-to-four family real estate loans from third parties and purchased $32.3 million of multifamily and commercial real estate loans from third parties.

At December 31, 2020, commercial business loans included $344.4 million SBA PPP loans and net deferred fees related to these loans totaling $6.6 million. At December 31, 2019 there were no SBA PPP loans.

    At December 31, 2020 and 2019, the carrying value of loans serviced by the Company for investors was $598.0 million and $526.3 million, respectively. These loans are not included in the Consolidated Statements of Financial Condition. Servicing income totaled $1.4 million, $1.2 million, and $1.1 million for the years ended December 31, 2020, 2019 and 2018.

    The Company has entered into Guarantor Swaps with Freddie Mac which results in improved liquidity. During the year ended December 31, 2020, the Company exchanged $117.3 million of loans for Freddie Mac mortgage participation certificates, resulting in gross gains of $3.5 million and no gross losses. During the year ended December 31, 2019, the Company exchanged $21.6 million of loans for Freddie Mac mortgage participation certificates. During the year ended December 31, 2018, no loans were exchanged for a Freddie Mac Mortgage participation certificate. The Company retained the servicing of these loans.

112

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(7)     Loans Receivable and Allowance for Loan Losses (continued)

The Company has granted loans to certain officers and directors of the Company and its subsidiaries and to their associates. At December 31, 2020 and 2019, such loans totaled approximately $1.6 million and $1.1 million, respectively. During the year ended December 31, 2020, the Bank granted one new loan to a related party totaling $300,000. During the years ended December 31, 2019 and 2018, no new loans were granted to related parties. These loans are performing in accordance with their original terms.

    The following tables summarize the aging of loans receivable by portfolio segment, including non-accrual loans and excluding PCI loans at December 31, 2020 and 2019:

	December 31, 2020
	30-59 Days		60-89 Days		90 Days or More		Total Past Due		Non-accrual		Current		Total
	(In thousands)
Real estate loans:
One-to-four family	$	3,068	$	912	$	1,901	$	5,881	$	2,637	$	1,931,809	$	1,940,327
Multifamily and commercial	15,645		—		1,238		16,883		1,873		2,799,209		2,817,965
Construction	550		—		—		550		—		328,161		328,711
Commercial business loans	2,343		1,056		2,453		5,852		2,968		744,050		752,870
Consumer loans:
Home equity loans and advances	1,156		696		394		2,246		678		318,253		321,177
Other consumer loans	4		—		—		4		—		1,493		1,497
Total loans	$	22,766	$	2,664	$	5,986	31,416		$	8,156	$	6,122,975	$	6,162,547

	December 31, 2019
	30-59 Days		60-89 Days		90 Days or More		Total Past Due		Non-accrual		Current		Total
	(In thousands)
Real estate loans:
One-to-four family	$	6,249	$	2,132	$	1,638	$	10,019	$	1,732	$	2,065,328	$	2,077,079
Multifamily and commercial	626		1,210		716		2,552		716		2,916,717		2,919,985
Construction	—		—		—		—		—		298,942		298,942
Commercial business loans	1,056		—		2,489		3,545		3,686		475,984		483,215
Consumer loans:
Home equity loans and advances	1,708		246		405		2,359		553		385,215		388,127
Other consumer loans	3		—		—		3		—		1,957		1,960
Total loans	$	9,642	$	3,588	$	5,248	18,478		$	6,687	$	6,144,143	$	6,169,308

    The Company considers a loan to be delinquent when we have not received a payment within 30 days of its contractual due date. Generally, a loan is designated as a non-accrual loan when the payment of interest is 90 days or more in arrears of its contractual due date. Non-accruing loans are returned to an accrual status after there has been a sustained period of repayment performance (generally six consecutive months of payments) and both principal and interest are deemed collectible. The Company identifies loans that may need to be charged-off as a loss, by reviewing all delinquent loans, classified loans and other loans that management may have concerns about collectability. At December 31, 2020 and 2019, non-accrual loans totaled $8.2 million and $6.7 million, respectively. Included in non-accrual loans at December 31, 2020, are 19 loans totaling $2.2 million which are less than 90 days in arrears. At December 31, 2019, eight loans totaling $1.5 million, were less than 90 days in arrears.

113

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(7)     Loans Receivable and Allowance for Loan Losses (continued)

If non-accrual loans had performed in accordance with their original terms, interest income would have increased by $426,000, $509,000, and $126,000 for the years ended December 31, 2020, 2019 and 2018, respectively. The amount of cash basis interest income that was recognized on these loans during the years ended December 31, 2020, 2019 and 2018, was $410,000, $437,000, and $89,000, respectively.

At December 31, 2020 and 2019, there were no loans past due 90 days or more still accruing interest other than COVID-19 related loan forbearance and deferrals. In accordance with the CARES Act, these loans are not included in the aging of loans receivable by portfolio segment in the table above, and the Bank continues to accrue interest income during the forbearance or deferral period. If adverse information indicating that the borrower's capability of repaying all amounts due is unlikely, the interest accrual will cease.

PCI loans are loans acquired at a discount primarily due to deteriorated credit quality. These loans are initially recorded at fair value at acqisition, based upon the present value of expected future cash flows, with no related allowance for loan losses, and aggregated and accounted for as pools of loans based on common risk characteristics. The difference between the undiscounted cash flows expected at acquisition and the initial carrying amount (fair value) of the PCI loans, or the “accretable yield,” is recognized as interest income utilizing the level-yield method over the life of each pool. Contractually required payments for interest and principal that exceed the undiscounted cash flows expected at acquisition, or the “non-accretable difference,” are not recognized as a yield adjustment, as a loss accrual or a valuation allowance. Reclassifications of the non-accretable difference to the accretable yield may occur subsequent to the loan acquisition dates due to increases in expected cash flows of the loan pools. See note 3 for additional information.

The following table presents information regarding the estimates of the contractually required payments, the cash flows expected to be collected, and the estimated fair value of the PCI loans acquired in the Stewardship acquisition as of November 1, 2019 (See note 3 for more details):

	November 1, 2019
	(In thousands)
Contractually required principal and interest	$	9,286
Contractual cash flows not expected to be collected (non-accretable difference)	(1,823)
Expected cash flows to be collected	7,463
Interest component of expected cash flows (accretable yield)	(556)
Fair value of acquired loans	$	6,907

The following table presents information regarding the estimates of the contractually required payments, the cash flows expected to be collected, and the estimated fair value of the PCI loans acquired in the Roselle acquisition as of April 1, 2020 (See note 3 for more details):

	April 1, 2020
	(In thousands)
Contractually required principal and interest	$	461
Contractual cash flows not expected to be collected (non-accretable difference)	(237)
Expected cash flows to be collected	224
Interest component of expected cash flows (accretable yield)	(51)
Fair value of acquired loans	$	173

114

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(7) Loans Receivable and Allowance for Loan Losses (continued)

The following table presents changes in accretable yield for PCI loans for the years ended December 31, 2020 and 2019:

	December 31,
	2020		2019
	(In thousands)
Balance at beginning of period	$	511	$	—
Acquisition	58		556
Accretion	(34)		(30)
Net change in expected cash flows	(117)		(15)
Balance at end of period	$	418	$	511

The net increase in expected cash flows for certain pools of loans included in the table above is recognized prospectively as an adjustment to the yield over the estimated remaining life of the individual pools.

    We may obtain physical possession of real estate collateralizing a residential mortgage loan via foreclosure or through an in-substance repossession. At December 31, 2020 and 2019, the Company had no real estate owned. At of December 31, 2020 and 2019, we had two and four residential mortgage loans with carrying values totaling $398,000 and $522,000, respectively, collateralized by residential real estate which are in the process of foreclosure. The states of New Jersey, New York and Pennsylvania have issued executive orders which declare moratoriums on removing individuals from a residential property until at least two months after the COVID health crisis has ended. In response to these orders, in March 2020, the Company temporarily suspended residential property foreclosure sales and evictions.

    The Company maintains the allowance for loan losses through provisions for loan losses which are charged to income. Charge-offs against the allowance for loan losses are taken on loans where management determines that the collection of loan principal is unlikely. Recoveries made on loans that have been charged-off are credited to the allowance for loan losses.

    As part of the evaluation of the adequacy of the allowance for loan losses, management prepares an analysis each quarter that categorizes the entire loan portfolio by certain risk characteristics such as loan type (residential mortgage, commercial mortgage, construction, commercial business, etc.) and loan risk rating.

    The Company utilizes an eight-point risk rating system to summarize its loan portfolio into categories with similar risk characteristics. Loans deemed to be “acceptable quality” are rated 1 through 4 (Pass), with a rating of 1 established for loans with minimal risk. Loans that are deemed to be of “questionable quality” are rated 5 (Special Mention) or 6 (Substandard). Loans with adverse classifications are rated 7 (Doubtful) or 8 (Loss). The risk ratings are also confirmed through periodic loan review examinations, which are currently performed by both an independent third-party and the Company's credit risk review department. The Company requires an annual review be performed above certain dollar thresholds, depending on loan type, to help determine the appropriate risk ratings. Results from examinations are presented to the Audit Committee of the Board of Directors.

    Management estimates the allowance for loans collectively evaluated for impairment by applying quantitative loss factors to the loan segments by risk rating and determining adjustments to each loan segment at an overall level. Quantitative loss factors give consideration to historical loss experience and migration experience by loan type based on an appropriate look-back period, adjusted for a loss emergence period.

Qualitative adjustments give consideration to other qualitative or environmental factors such as trends and levels of delinquencies, impaired loans, charge-offs, recoveries and loan volumes, as well as national and local economic trends and conditions.

    Qualitative adjustments reflect risks in the loan portfolio not captured by the quantitative loss factors and, as such, are evaluated relative to the risk levels present over the look-back period. The reserves resulting from the application of both the quantitative experience and qualitative factors are combined to arrive at the allowance for loan losses for loans collectively evaluated for impairment.

    Management believes the primary risks inherent in the portfolio are a general decline in the economy, a decline in real estate market values, rising unemployment, increasing vacancy rates, and increases in interest rates in the absence of economic improvement. Any one or a combination of these events may adversely affect a borrowers’ ability to repay its loan, resulting in increased delinquencies and loan losses. Accordingly, the Company has recorded loan losses at a level which is estimated to represent the current risk in its loan portfolio. Management considers it important to maintain the ratio of the allowance for loan losses to total loans at an acceptable level considering the current composition of the loan portfolio.

115

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(7)     Loans Receivable and Allowance for Loan Losses (continued)

    Although management believes that the Company has established and maintains the allowance for loan losses at appropriate levels, additional reserves may be necessary if future economic and other conditions differ substantially from the current operating environment. Management evaluates its estimates and assumptions on an ongoing basis and the estimates and assumptions are adjusted when facts and circumstances necessitate a re-valuation of the estimate. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. In addition, regulatory agencies periodically review the adequacy of the Company’s allowance for loan losses as an integral part of their examination process. Such agencies may require the Company to recognize additions to the allowance or additional write-downs based on their judgments about information available to them at the time of their examination. Although management uses the best information available, the level of the allowance for loan losses remains an estimate that is subject to significant judgement

    The Bank defines a loan as impaired when, based on current information and events, it is probable that a creditor will be unable to collect all amounts due under the contractual terms of the loan agreement. All multifamily and commercial real estate, construction, and commercial business loans with an outstanding balance of greater than $500,000 and not accruing interest, loans modified in a troubled debt restructuring (TDR), and other loans if there is specific information of a collateral shortfall are individually evaluated for impairment. Impairment is measured by determining the present value of expected future cash flows or, for collateral-dependent loans, the fair value of the collateral less estimated selling costs.

    The following tables summarize loans receivable (including PCI loans) and allowance for loan losses by portfolio segment and impairment method at December 31, 2020 and 2019:

	December 31, 2020
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Allowance for loan losses:
Individually evaluated for impairment	$	391	$	601	$	—	$	84	$	12	$	—	$	1,088
Collectively evaluated for impairment	13,195		30,080		11,271		17,300		1,736		6		73,588
Loans acquired with deteriorated credit quality	—		—		—		—		—		—		—
Total	$	13,586	$	30,681	$	11,271	$	17,384	$	1,748	$	6	$	74,676
Total loans:
Individually evaluated for impairment	$	7,257	$	32,792	$	—	$	3,447	$	1,651	$	—	$	45,147
Collectively evaluated for impairment	1,933,070		2,785,173		328,711		749,423		319,526		1,497		6,117,400
Loans acquired with deteriorated credit quality	309		4,893		—		1,143		—		—		6,345
Total loans	$	1,940,636	$	2,822,858	$	328,711	$	754,013	$	321,177	$	1,497	$	6,168,892

116

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(7)     Loans Receivable and Allowance for Loan Losses (continued)

	December 31, 2019
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Allowance for loan losses:
Individually evaluated for impairment	$	484	$	2	$	—	$	1,121	$	14	$	—	$	1,621
Collectively evaluated for impairment	13,296		22,978		7,435		14,715		1,655		9		60,088
Loans acquired with deteriorated credit quality	—		—		—		—		—		—		—
Total	$	13,780	$	22,980	$	7,435	$	15,836	$	1,669	$	9	$	61,709
Total loans:
Individually evaluated for impairment	$	8,891	$	2,599	$	—	$	5,178	$	2,143	$	—	$	18,811
Collectively evaluated for impairment	2,068,188		2,917,386		298,942		478,037		385,984		1,960		6,150,497
Loans acquired with deteriorated credit quality	429		4,866		—		1,726		—		—		7,021
Total loans	$	2,077,508	$	2,924,851	$	298,942	$	484,941	$	388,127	$	1,960	$	6,176,329

Loan modifications to borrowers experiencing financial difficulties that are considered troubled debt restructurings ("TDRs") primarily involve the lowering of the monthly payments on such loans through either a reduction in interest rate below a market rate, an extension of the term of the loan without a corresponding adjustment to the risk premium reflected in the interest rate, or a combination of these two methods. These modifications generally do not result in the forgiveness of principal or accrued interest. In addition, the Company attempts to obtain additional collateral or guarantor support when modifying such loans. Non-accruing restructured loans may be returned to accrual status when there has been a sustained period of repayment performance (generally six consecutive months of payments) and both principal and interest are deemed collectible.

Section 4013 of the CARES Act, “Temporary Relief from Troubled Debt Restructurings,” allows banks to temporarily suspend certain requirements under GAAP related to TDRs for a limited period of time to account for the effects of COVID-19. The Bank elected to account for modifications on certain loans under Section 4013 of the CARES Act or, if the loan modification was not eligible under Section 4013, used the criteria in the COVID-19 guidance to determine when the loan modification was not a TDR in accordance with ASC 310-40. Guidance noted that modification or deferral programs mandated by the federal or a state government related to COVID-19 would not be in the scope of ASC 310-40, such as a state program that requires all institutions within that state to suspend mortgage payments for a specified period. These short-term loan modifications will not be treated as troubled debt restructurings during the short-term modification period if the loan was not in arrears at December 31, 2019. Furthermore, based on current evaluations, generally, we have continued the accrual of interest on these loans during the short-term modification period. The Consolidated Appropriations Act, 2021, which was enacted in late December 2020, extended certain provisions of the CARES Act, including provisions permitting loan deferral extension requests to not be treated as troubled debt restructurings.

    The following tables present the number of loans modified as TDRs during the years ended December 31, 2020, 2019 and 2018, along with their balances immediately prior to the modification date and post-modification. Post-modification recorded investment represents the net book balance immediately following modification.

117

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Notes to Consolidated Financial Statements

(7)     Loans Receivable and Allowance for Loan Losses (continued)

	For the Years Ended December 31,
	2020					2019
	No. of Loans	Pre-modification Recorded Investment		Post-modification Recorded Investment		No. of Loans	Pre-modification Recorded Investment		Post-modification Recorded Investment
	(Dollars in thousands)
Troubled Debt Restructurings
Real estate loans:
Multifamily and commercial	5	$	17,022	$	17,022	—	$	—	$	—
Commercial business loans	2	11,507		12,802		1	4,095		4,095
Total restructured loans	7	$	28,529	$	29,824	1	$	4,095	$	4,095

	For the Year Ended December 31,
	2018
	No. of Loans	Pre-modification Recorded Investment		Post-modification Recorded Investment
		(Dollars in thousands)
Troubled Debt Restructurings
Real estate loans:
One-to-four family	5	$	801	$	801
Multifamily and commercial	1	65		65
Consumer loans:
Home equity loans and advances	1	588		588
Total restructured loans	7	$	1,454	$	1,454

    The activity in the allowance for loan losses for the years ended December 31, 2020, 2019 and 2018, are as follows:

	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Balance at beginning of period	$	61,709	$	62,342	$	58,178
Provision charged	18,447		4,224		6,677
Recoveries	823		496		707
Charge-offs	(6,303)		(5,353)		(3,220)
Balance at end of period	$	74,676	$	61,709	$	62,342

118

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Notes to Consolidated Financial Statements

(7)     Loans Receivable and Allowance for Loan Losses (continued)

    The activity in the allowance for loan losses by portfolio segment for the years ended December 31, 2020, 2019 and 2018, are as follows:

	For the Year Ended December 31, 2020
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Balance at beginning of period	$	13,780	$	22,980	$	7,435	$	15,836	$	1,669	$	9	$	61,709
Provision charged (credited)	1,299		7,713		3,835		5,360		239		1		18,447
Recoveries	438		16		1		308		60		—		823
Charge-offs	(1,931)		(28)		—		(4,120)		(220)		(4)		(6,303)
Balance at end of period	$	13,586	$	30,681	$	11,271	$	17,384	$	1,748	$	6	$	74,676

	For the Year Ended December 31, 2019
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Balance at beginning of period	$	15,232	$	23,251	$	7,217	$	14,176	$	2,458	$	8	$	62,342
Provision charged (credited)	(429)		(178)		216		5,250		(638)		3		4,224
Recoveries	30		10		2		404		50		—		496
Charge-offs	(1,053)		(103)		—		(3,994)		(201)		(2)		(5,353)
Balance at end of period	$	13,780	$	22,980	$	7,435	$	15,836	$	1,669	$	9	$	61,709

	For the Year Ended December 31, 2018
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Unallocated		Total
	(In thousands)
Balance at beginning of period	$	19,991	$	19,933	$	5,217	$	8,275	$	4,576	$	8	$	178	$	58,178
Provision charged (credited)	(4,503)		3,445		1,997		7,860		(1,949)		5		(178)		6,677
Recoveries	334		2		3		240		122		6		—		707
Charge-offs	(590)		(129)		—		(2,199)		(291)		(11)		—		(3,220)
Balance at end of period	$	15,232	$	23,251	$	7,217	$	14,176	$	2,458	$	8	$	—	$	62,342

119

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Notes to Consolidated Financial Statements

(7)     Loans Receivable and Allowance for Loan Losses (continued)

    The following tables present loans individually evaluated for impairment by loan segment, excluding PCI loans, at December 31, 2020 and 2019:

	At December 31, 2020
	Recorded Investment		Unpaid Principal Balance		Specific Allowance
	(In thousands)
With no allowance recorded:
Real estate loans:
One-to-four family	$	3,344	$	3,898	$	—
Multifamily and commercial	13,058		13,094		—
Commercial business loans	1,945		1,945		—
Consumer loans:
Home equity loans and advances	714		851		—
	19,061		19,788		—
With a specific allowance recorded:
Real estate loans:
One-to-four family	3,913		3,919		391
Multifamily and commercial	19,734		20,350		601
Commercial business loans	1,502		1,502		84
Consumer loans:
Home equity loans and advances	937		937		12
	26,086		26,708		1,088
Total:
Real estate loans:
One-to-four family	7,257		7,817		391
Multifamily and commercial	32,792		33,444		601
Commercial business loans	3,447		3,447		84
Consumer loans:
Home equity loans and advances	1,651		1,788		12
Total loans	$	45,147	$	46,496	$	1,088

120

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Notes to Consolidated Financial Statements

(7)     Loans Receivable and Allowance for Loan Losses (continued)

	At December 31, 2019
	Recorded Investment		Unpaid Principal Balance		Specific Allowance
	(In thousands)
With no allowance recorded:
Real estate loans:
One-to-four family	$	4,314	$	5,473	$	—
Multifamily and commercial	1,494		2,191		—
Commercial business loans	3,859		4,048		—
Consumer loans:
Home equity loans and advances	1,080		1,217		—
	10,747		12,929		—
With a specific allowance recorded:
Real estate loans:
One-to-four family	4,577		4,613		484
Multifamily and commercial	1,105		1,105		2
Commercial business loans	1,319		4,307		1,121
Consumer loans:
Home equity loans and advances	1,063		1,063		14
	8,064		11,088		1,621
Total:
Real estate loans:
One-to-four family	8,891		10,086		484
Multifamily and commercial	2,599		3,296		2
Commercial business loans	5,178		8,355		1,121
Consumer loans:
Home equity loans and advances	2,143		2,280		14
Total loans	$	18,811	$	24,017	$	1,621

    Specific allocations of the allowance for loan losses attributable to impaired loans totaled $1.1 million and $1.6 million at December 31, 2020 and 2019, respectively. At December 31, 2020 and 2019, impaired loans for which there was no related allowance for loan losses totaled $19.1 million and $10.7 million, respectively.

121

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Notes to Consolidated Financial Statements

(7)     Loans Receivable and Allowance for Loan Losses (continued)

    The following table presents interest income recognized for loans individually evaluated for impairment, by loan segment, excluding PCI loans for the years ended December 31, 2020, 2019 and 2018:

	For the Years Ended December 31,
	2020				2019				2018
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(In thousands)
Real estate loans:
One-to-four family	$	7,946	$	305	$	8,811	$	434	$	10,224	$	445
Multifamily and commercial	23,701		1,091		2,639		147		2,712		155
Construction	—		—		850		—		—		—
Commercial business loans	4,963		216		6,378		479		3,060		118
Consumer loans:
Home equity loans and advances	1,909		100		2,562		143		3,361		173
Totals	$	38,519	$	1,712	$	21,240	$	1,203	$	19,357	$	891

    The recorded investment in TDRs totaled $45.4 million at December 31, 2020, of which one loan totaling $91,000 was over 90 days past due, and three loans totaling $11.9 million were 30-59 days past due. The remaining loans modified were current at the time of restructuring and have complied with the terms of their restructure agreement at December 31, 2020. The recorded investment in TDRs totaled $20.0 million at December 31, 2019, of which there were no loans were over 90 days past due and three loans totaling $660,000 were 30-59 days past due. The remaining loans modified were current at the time of restructuring and have complied with the terms of their restructure agreement at December 31, 2019. The recorded investment in TDRs totaled $16.0 million at December 31, 2018, of which one loan totaling $101,000 was over 90 days past due, and seven loans totaling $1.0 million were 30-59 days past due. The remaining loans modified were current at the time of restructuring and have complied with the terms of their restructure agreement at December 31, 2018.

    The following tables present loans receivable by credit quality risk indicator and by loan segment, excluding PCI loans at December 31, 2020 and 2019:

	December 31, 2020
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Pass	$	1,935,032	$	2,758,905	$	328,711	$	740,010	$	320,092	$	1,497	$	6,084,247
Special mention	404		40,392		—		6,718		—		—		47,514
Substandard	4,891		18,668		—		6,142		1,085		—		30,786
Doubtful	—		—		—		—		—		—		—
Total	$	1,940,327	$	2,817,965	$	328,711	$	752,870	$	321,177	$	1,497	$	6,162,547

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Notes to Consolidated Financial Statements

(7)     Loans Receivable and Allowance for Loan Losses (continued)

	December 31, 2019
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Pass	$	2,072,878	$	2,900,286	$	298,942	$	454,183	$	387,251	$	1,960	$	6,115,500
Special mention	419		4,724		—		20,170		—		—		25,313
Substandard	3,782		14,975		—		8,862		876		—		28,495
Doubtful	—		—		—		—		—		—		—
Total	$	2,077,079	$	2,919,985	$	298,942	$	483,215	$	388,127	$	1,960	$	6,169,308

(8)    Office Properties and Equipment, net

    Office properties and equipment less accumulated depreciation at December 31, 2020 and 2019 are summarized as follows:

	December 31,
	2020		2019
	(In thousands)
Land	$	10,174	$	11,069
Buildings	31,523		27,340
Land and building improvements	35,307		31,520
Leasehold improvements	22,166		24,038
Furniture and equipment	33,971		36,828
	133,141		130,795
Less accumulated depreciation and amortization	57,167		57,828
Total office properties and equipment, net	$	75,974	$	72,967

Land and building improvements at December 31, 2020 and 2019 included $2.6 million and $1.3 million, respectively, in construction in progress for the renovation of the Bank's corporate headquarters and various other facilities. At December 31, 2020 and 2019, $1.9 million and $1.8 million, respectively, included in buildings, are properties classified as held-for-sale, and carried at fair value.

    Depreciation and amortization expense for the years ended December 31, 2020, 2019 and 2018, amounted to $6.5 million, $4.9 million, $3.8 million, respectively.

(9)    Leases

Effective January 1, 2020, the Company adopted ASU 2016-02 Leases (Topic 842) and all subsequent ASU's that modified Topic 842, as explained in note 2, Summary of Significant Accounting Policies, Accounting Pronouncements Adopted. The Company's leases primarily relate to real estate property for branches and office space. At December 31, 2020, all of the Company's leases are classified as operating leases.

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Notes to Consolidated Financial Statements

(9)    Leases (continued)

The Company determines if an arrangement is a lease at inception. Topic 842 requires lessees to recognize a right-of-use asset and a lease liability, measured at the present value of the future minimum lease payments, at the lease commencement date. At the time of adoption, an operating lease right-of-use asset of $22.2 million and operating lease liabilities of $23.3 million were recorded in other assets and other liabilities, respectively on our Consolidated Statements of Financial Condition. The calculated amount of the right-of-use asset and lease liabilities are impacted by the length of the lease term and the discount rate used to calculate the present value of minimum lease payments. As the Company's leases do not provide an implicit rate, the discount rate used in determining the lease liability for each individual lease was the Company's incremental borrowing rate at the time of adoption of ASU 2016-02, on a collateralized basis, over a similar term. Certain leases include options to renew, with one or more renewal terms usually ranging from 3 years to 10 years. For each lease, these extension options were evaluated, and those which were considered reasonably certain of renewal were included in the lease term.

At December 31, 2020, the weighted average remaining lease term for operating leases was 7.5 years and the weighted average discount rate used in the measurement of operating lease liabilities was 2.26%.

The Company elected to account for the lease and non-lease components separately since such amounts are readily determinable under the Company's lease contracts. Operating lease expense is recognized on a straight-line basis over the lease term, while variable lease payments are recognized as incurred. Variable lease payments include common area maintenance charges, real estate taxes, repairs and maintenance costs and utilities. Operating and variable lease expenses are recorded in occupancy expense in the Consolidated Statements of Income. During the year ended December 31, 2020, operating and variable lease expenses totaled approximately $2.4 million.

There were no sale and leaseback transactions, leveraged leases or lease transactions with related parties during the year ended December 31, 2020. At December 31, 2020, the Company had no leases that had not yet commenced.

The following table summarizes lease payment obligations for each of the next five years and thereafter as follows:

At December 31, 2020	Lease Payment Obligations
	(In thousands)
2021	$	4,010
2022	3,624
2023	3,310
2024	2,586
2025	1,914
Thereafter	6,620
Total undiscounted cash flows	22,064
Discount on cash flows	(1,992)
Total lease liability	$	20,072

At December 31, 2019, operating lease commitments under lessee arrangements were $4.9 million, $4.5 million, $4.0 million, $3.5 million and $2.7 million for 2020 through 2024, respectively, and $5.0 million in aggregate for all years thereafter.

124

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Notes to Consolidated Financial Statements

(10)    Goodwill and Intangible Assets

    Intangible assets at December 31, 2020 and 2019 are summarized as follows:

	December 31,
	2020		2019
	(In thousands)
Goodwill	$	80,285	$	60,763
Core deposit intangibles	6,197		7,245
Mortgage servicing rights	902		574
	$	87,384	$	68,582

    Mortgage servicing rights' amortization expense for the years ended December 31, 2020, 2019, and 2018 amounted to $128,000, $109,000, and $73,000, respectively. Core deposit intangible amortization expense for the years ended December 31, 2020 and 2019 amounted to $1.0 million and $222,000, respectively. There was no core deposit amortization expense for the year ended December 31, 2018.

    Scheduled amortization of core deposit intangibles for each of the next five years and thereafter is as follows:

Year Ending December 31,	Core Deposit Intangible Amortization
	(In thousands)
2021	$	1,024
2022	961
2023	892
2024	819
2025	737
Thereafter	1,764
Total	$	6,197

125

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Notes to Consolidated Financial Statements

(11)    Deposits

    Deposits at December 31, 2020 and 2019 are summarized as follows:

	December 31,
	2020				2019
	Balance		Weighted Average Rate		Balance		Weighted Average Rate
	(Dollars in thousands)
Non-interest-bearing demand	$	1,354,605	—	%	$	958,442	—	%
Interest-bearing demand	2,189,164		0.40		1,720,383		1.03
Money market accounts	588,180		0.36		410,392		0.91
Savings and club deposits	688,309		0.16		543,480		0.15
Certificates of deposit	1,958,366		1.44		2,013,145		2.25
Total deposits	$	6,778,624	0.59	%	$	5,645,842	1.20	%

    Included in the above balances at December 31, 2020 and 2019 are certificates of deposit obtained through brokers, totaling $26.3 million and $31.6 million that were acquired from Stewardship.

    The aggregate amount of certificates of deposit that meet or exceed $100,000 totaled approximately $1.0 billion and $1.1 billion at December 31, 2020 and 2019, respectively.

    Scheduled maturities of certificates of deposit accounts at December 31, 2020 and 2019 are summarized as follows:

	December 31,
	2020		2019
	(In thousands)
One year or less	$	1,494,129	$	1,293,613
After one year to two years	337,579		548,995
After two years to three years	52,809		142,458
After three years to four years	23,018		11,362
After four years	50,831		16,717
	$	1,958,366	$	2,013,145

    Interest expense on deposits for the years ended December 31, 2020, 2019, and 2018 are summarized as follows:

	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Demand (including money market accounts)	$	15,556	$	19,922	$	12,933
Savings and club deposits	1,023		770		993
Certificates of deposit	38,667		40,859		25,597
	$	55,246	$	61,551	$	39,523

126

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Notes to Consolidated Financial Statements

(12)    Borrowings

    Borrowings at December 31, 2020 and 2019 are summarized as follows:

	December 31,
	2020		2019		2020		2019
	Balance				Weighted Average Interest Rate
	(In thousands)
Overnight lines of credit	$	—	$	107,800	—	%	1.81	%
FHLB advances	792,412		1,275,391		1.18		2.09
Subordinated notes	—		16,899		—		6.75
Junior subordinated debentures	6,952		6,932		3.20		5.09
	$	799,364	$	1,407,022	1.20	%	2.14	%

    At December 31, 2020, the Company had no outstanding overnight lines of credit with the FHLB. At December 31, 2019, the Company had $107.8 million of outstanding lines of credit with the FHLB. Interest expense on the overnight advances for the years ended December 31, 2020, 2019, and 2018, were $425,000, $1.8 million, and $2.2 million, respectively.

    At December 31, 2020, the Bank could borrow funds from the FHLB under an overnight advance program up to the Bank's maximum borrowing capacity based on its ability to collateralize such borrowings. Members in good standing can borrow up to 50% of their asset size as long as they have qualifying collateral to support the advance and purchase of FHLB capital. Additionally, at both December 31, 2020 and 2019, the Bank had unused correspondent bank lines of credit with an aggregate overnight borrowing capacity of $250.0 million.

    At December 31, 2020, FHLB advances were at fixed rates with maturities between January 2021 and February 2025, and at December 31, 2019, FHLB advances were at fixed rates with maturities between January 2020 and August 2024. At December 31, 2020 and 2019, FHLB advances were collateralized by FHLB capital stock owned by the Bank, and loans with carrying values totaling $2.1 billion and $1.9 billion, respectively. Loans securing advances consists of one-to-four family, multifamily and commercial and home equity real estate loans. At December 31, 2020 and 2019, FHLB advances were also collateralized by securities with carrying values totaling $222.4 million and $246.2 million, respectively. Interest expense on fixed rate FHLB advances for the years ended December 31, 2020, 2019, and 2018, were $17.7 million, $25.2 million, and $17.1 million, respectively.

    At December 31, 2020 and 2019, short-term FHLB advances totaling $430.0 million and $410.0 million, respectively, were designated as hedged items as part of a cash flow hedging program. See note 22 for information regarding these transactions.

    Scheduled maturities of FHLB advances at December 31, 2020 are summarized as follows:

	Year Ended December 31,
	2020
	(In thousands)
One year or less	$	496,042
After one year to two years	179,706
After two years to three years	40,391
After three years to four years	51,273
After four years	25,000
Total FHLB advances	$	792,412

127

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Notes to Consolidated Financial Statements

(12)    Borrowings (continued)

    At December 31, 2020 and 2019, the carrying value of junior subordinated debt balances were $7.0 million and $6.9 million, respectively. The balance outstanding at December 31, 2020 and 2019 represents debentures issued in 2003 by Stewardship Statutory Trust (the "Trust"), a statutory business trust that was acquired in the Stewardship merger. These floating rate debentures mature on September 17, 2033 and adjust quarterly at a rate of three month LIBOR plus 3.20%. At December 31, 2020 and 2019 the rate of interest was 3.20% and 5.09%, respectively. In August 2018, the Company redeemed all other junior subordinated debt securities that were previously outstanding. Interest expense for the years ended December 31, 2020, 2019, and 2018 were $295,000, $65,000, $3.5 million, respectively.

    At December 31, 2019, the balance of subordinated notes was $16.9 million. At December 31, 2020, the balance was zero as the subordinated notes were prepaid in September 2020. The Company acquired these subordinated notes in the Stewardship merger. The subordinated notes had a maturity date of August 25, 2025, and included a right of prepayment, without penalty, on or after August 28, 2020. Interest expense for the years ended December 31, 2020 and 2019 were $448,000 and $113,000, respectively. There were no subordinated notes outstanding at or during the year ended December 31, 2018.

(13)    Stockholders' Equity

Regulatory Capital

    The Company and its subsidiary Bank are subject to various regulatory capital requirements administered by the federal banking regulators, including a risk-based capital measure. The Federal Reserve establishes capital requirements, including well capitalized standards, for the consolidated financial holding company, and the Office of the Comptroller of the Currency (the "OCC") has similar requirements for the Company's subsidiary bank. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company's Consolidated Statements of Financial Condition.

    Federal regulators require federally insured depository institutions to meet several minimum capital standards: (1) total capital to risk-weighted assets of 8.0%; (2) tier 1 capital to risk-weighted assets of 6.0%; (3) common equity tier 1 capital to risk-weighted assets of 4.5%; and (4) tier 1 capital to adjusted total assets of 4.0%. In addition to establishing the minimum regulatory capital requirements, the regulations limit capital distributions and certain discretionary bonus payments to management if the institution does not hold a "capital conservation buffer" consisting of 2.5% of common equity tier 1 capital to risk-weighted assets above the amount necessary to meet its minimum risk-based capital requirements. The capital conservation buffer capital requirement was fully phased on January 1, 2019. The regulators established a framework for the classification of savings institutions into five categories: well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized, and critically undercapitalized. Generally, an institution is considered well capitalized if it has: a total capital to risk-weighted assets ratio of at least 10.0%, a tier 1 capital to risk-weighted assets ratio of at least 8.0%, a common tier 1 capital to risk-weighted assets ratio of at least 6.5%, and a tier 1 capital to adjusted total assets ratio of at least 5.0%. As of December 31, 2020 and 2019, each of the Company and the Bank exceeded all capital adequacy requirements to which it is subject.

    Based upon most recent notification from federal banking regulators, the Bank was categorized as well capitalized as of June 30, 2020, under the regulatory framework for prompt corrective action. There are no conditions existing or events which have occurred since notification that management believes have changed the Bank's category.

    The following table presents the Company's and the Bank's actual capital amounts and ratios at December 31, 2020 and 2019 compared to the Federal Reserve Bank minimum capital adequacy requirements and the Federal Reserve Bank requirements for classification as a well-capitalized institution:

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Notes to Consolidated Financial Statements

(13)    Stockholders' Equity (continued)

Regulatory Capital (continued)

	Actual				Minimum Capital Adequacy Requirements				Minimum Capital Adequacy Requirements With Capital Conservation Buffer				To Be Well Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio		Amount		Ratio		Amount		Ratio		Amount		Ratio
Company	(In thousands, except ratio data)
At December 31, 2020:
Total capital (to risk-weighted assets)	$	1,070,361	18.54	%	$	461,766	8.00	%	$	606,068	10.50	%	N/A		N/A
Tier 1 capital (to risk-weighted assets)	998,172		17.29		346,325		6.00		490,627		8.50		N/A		N/A
Common equity tier 1 capital (to risk-weighted assets)	990,955		17.17		259,744		4.50		404,046		7.00		N/A		N/A
Tier 1 capital (to adjusted total assets)	998,172		11.38		350,923		4.00		350,923		4.00		N/A		N/A
At December 31, 2019:
Total capital (to risk-weighted assets)	$	1,061,555	17.25	%	$	492,438	8.00	%	$	646,324	10.50	%	N/A		N/A
Tier 1 capital (to risk-weighted assets)	988,172		16.05		369,328		6.00		523,215		8.50		N/A		N/A
Common equity tier 1 capital (to risk-weighted assets)	980,995		15.94		276,996		4.50		430,883		7.00		N/A		N/A
Tier 1 capital (to adjusted total assets)	988,172		12.92		305,824		4.00		305,824		4.00		N/A		N/A
Bank
At December 31, 2020:
Total capital (to risk-weighted assets)	$	924,959	16.05	%	$	460,944	8.00	%	$	604,989	10.50	%	$	576,180	10.00	%
Tier 1 capital (to risk-weighted assets)	852,897		14.80		345,708		6.00		489,753		8.50		460,944		8.00
Common equity tier 1 capital (to risk-weighted assets)	852,897		14.80		259,281		4.50		403,326		7.00		374,517		6.50
Tier 1 capital (to adjusted total assets)	852,897		9.72		350,815		4.00		350,815		4.00		438,519		5.00
At December 31, 2019:
Total capital (to risk-weighted assets)	$	844,664	14.25	%	$	474,125	8.00	%	$	622,290	10.50	%	$	592,657	10.00	%
Tier 1 capital (to risk-weighted assets)	782,881		13.21		355,594		6.00		503,758		8.50		474,125		8.00
Common equity tier 1 capital (to risk-weighted assets)	782,881		13.21		266,696		4.50		414,860		7.00		385,227		6.50
Tier 1 capital (to adjusted total assets)	782,881		10.25		305,423		4.00		305,423		4.00		381,779		5.00

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Notes to Consolidated Financial Statements

(13)    Stockholders' Equity (continued)

Stock Repurchase Program

    On June 11, 2019, the Company announced that its Board of Directors authorized the Company's first stock repurchase program since the completion of its minority public offering in April 2018. This program, which commenced on June 13, 2019, authorized the purchase of up to 4,000,000 shares, or approximately 3.5%, of the Company's then issued and outstanding common stock. On December 5, 2019, the Company announced that the Board of Directors had expanded its stock repurchase program to authorize the purchase of an additional 3,000,000 shares of the Company's outstanding common stock in addition to the shares remaining under the repurchase program announced on June 11, 2019. On April 23, 2020, the Company completed the repurchases under these stock repurchase programs. On September 10, 2020, the Company announced that its Board of Directors authorized the Company's second stock repurchase program for the purchase of up to 5,000,000 shares, or approximately 4.3%, of the Company's issued and outstanding common stock, commencing on September 15, 2020.

During the years ended December 31, 2020 and 2019, the Company repurchased 7,587,142 shares at at cost of approximately $108.2 million, or $14.26 per share, and 3,543,800 shares at a cost of approximately $55.3 million, or $15.61 per share, respectively, under these programs. Repurchased shares are held as treasury stock and are available for general corporate purposes. There were no stock repurchase programs in effect at or during the year ended December 31, 2018.

130

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Notes to Consolidated Financial Statements

(14)    Employee Benefit Plans

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan"), Post-retirement Plan, Split-Dollar Life Insurance Plans

    The Company maintains a single employer, tax-qualified defined benefit pension plan (the "Pension Plan") which covers full-time employees that satisfy the Pension Plan's eligibility requirements. The benefits are based on years of service and the employee's average compensation for the highest five consecutive years of employment. Effective October 1, 2018, employees hired by the Bank are not eligible to participate in the Bank's Pension Plan as the plan has been closed to new employees as of that date.

    The Company's policy is to fund at least the minimum contribution required by the Employee Retirement Income Security Act of 1974. GAAP requires an employer to: (a) recognize in its statement of financial position the over-funded or under-funded status of a defined benefit post-retirement plan measured as the difference between the fair value of plan assets and the benefit obligation; (b) measure a plan’s assets and its obligations that determine its funded status at the end of the employer’s fiscal year (with limited exceptions); and (c) recognize as a component of other comprehensive income (loss), net of tax, the actuarial gains and losses and the prior service costs and credits that arise during the period. The assets of the plan are primarily invested in fixed income and equity funds.

    The Company also has a Retirement Income Maintenance Plan (the "RIM" Plan), which is a non-qualified defined benefit plan which provides benefits to all employees of the Company if their benefits under the Pension Plan are limited by Internal Revenue Code 415 and 401(a)(17).    

     In addition, the Company provides certain health care and life insurance benefits to eligible retired employees under a Post-retirement Plan. The Company accrues the cost of retiree health care and other benefits during the employees’ period of active service. Effective January 1, 2019, the Post-retirement Plan has also been closed to new hires. The Company also provides life insurance benefits to eligible employees under an endorsement split-dollar life insurance program.

The Company also provides life insurance benefits to eligible employees under an endorsement split-dollar life insurance program. The Company recognizes a liability for future benefits applicable to endorsement split-dollar life insurance arrangements that provide death benefits post-retirement. Through the mergers with Stewardship and Roselle, the Company recognized an additional liability for future benefits applicable to endorsement split-dollar life insurance arrangements that provide death benefits post-retirement under those respective Bank's program.

The following table sets forth information regarding the Pension, RIM, Post-retirement and Split-Dollar Life Insurance Plans at December 31, 2020 and 2019:

131

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Notes to Consolidated Financial Statements

(14)    Employee Benefit Plans (continued)

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, Split-Dollar Life Insurance Plans (cont'd)

	December 31,
	2020		2019		2020		2019		2020		2019		2020		2019
	Pension Plan				RIM Plan				Post-retirement Plan				Split-Dollar Life Insurance
	(In thousands)
Change in benefit obligation:
Benefit obligation at beginning of year	$	263,826	$	209,205	$	13,696	$	11,285	$	24,603	$	20,964	$	14,100	$	10,462
Acquired	—		—		—		—		—		—		1,981		310
Service cost	7,985		6,494		267		210		394		339		467		354
Interest cost	7,608		8,569		405		466		683		826		507		457
Actuarial (gain) loss	40,281		46,001		2,506		2,074		5,506		3,141		3,137		2,649
Benefits paid	(7,260)		(6,443)		(344)		(339)		(565)		(667)		(211)		(132)
Benefit obligation at end of year	312,440		263,826		16,530		13,696		30,621		24,603		19,981		14,100
Change in plan assets:
Fair value of plan assets at beginning of year	356,347		272,974		—		—		—		—		—		—
Actuarial return on plan assets	50,820		54,816		—		—		—		—		—		—
Employer contributions	12,000		35,000		344		339		565		667		211		132
Benefits paid	(7,260)		(6,443)		(344)		(339)		(565)		(667)		(211)		(132)
Fair value of plan assets at end of year	411,907		356,347		—		—		—		—		—		—
Funded status at end of year	$	99,467	$	92,521	$	(16,530)	$	(13,696)	$	(30,621)	$	(24,603)	$	(19,981)	$	(14,100)

    At December 31, 2020 and 2019, the unfunded liability for the RIM Plan and Post-retirement Plan of $16.5 million and $30.6 million, and $13.7 million and $24.6 million, respectively, were included in other liabilities in the Consolidated Statements of Financial Condition, and the over-funded pension benefits associated with the Pension Plan totaling $99.5 million and $92.5 million respectively, were included in other assets in the Consolidated Statements of Financial Condition.

    The components of accumulated other comprehensive income related to the Pension Plan, RIM Plan, and Post-retirement Plan on a pre-tax basis, at December 31, 2020, 2019, and $2018, are summarized in the following table:

	At December 31,
	2020								2019
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance		Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
	(In thousands)
Unrecognized prior service costs	$	—	$	—	$	—	$	405	$	—	$	—	$	—	$	461
Unrecognized net actuarial income	76,686		7,686		12,417		8,741		68,752		5,777		7,221		6,058
Total accumulated other comprehensive income	$	76,686	$	7,686	$	12,417	$	9,146	$	68,752	$	5,777	$	7,221	$	6,519

132

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Notes to Consolidated Financial Statements

(14)    Employee Benefit Plans (continued)

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, Split-Dollar Life Insurance Plans (cont'd)

	At December 31
	2018
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
	(In thousands)
Unrecognized prior service costs	$	—	$	—	$	—	$	517
Unrecognized net actuarial income	59,579		3,748		4,226		3,658
Total accumulated other comprehensive income	$	59,579	$	3,748	$	4,226	$	4,175

    Net periodic benefit (income) cost for the Pension Plan, RIM Plan, Post-retirement Plan and Split-dollar Life Insurance plan benefits for the years ended December 31, 2020 and 2019, and 2018, includes the following components:

	For the Year Ended December 31,
	2020
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	7,985	$	267	$	394	$	467	Compensation and employee benefits
Interest cost	7,608		405		683		507		Other non-interest expense
Expected return on plan assets	(23,375)		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		56		Other non-interest expense
Net loss	4,902		397		309		454		Other non-interest expense
Net periodic (income) benefit cost	$	(2,880)	$	1,069	$	1,386	$	1,484

133

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(14)    Employee Benefit Plans (continued)

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, Split-Dollar Life Insurance Plans (cont'd)

	For the Year Ended December 31,
	2019
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	6,494	$	210	$	339	$	354	Compensation and employee benefits
Interest cost	8,569		466		826		457		Other non-interest expense
Expected return on plan assets	(21,058)		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		56		Other non-interest expense
Net loss	3,070		244		147		247		Other non-interest expense
Net periodic (income) benefit cost	$	(2,925)	$	920	$	1,312	$	1,114

	For the Year Ended December 31,
	2018
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	7,805	$	282	$	417	$	374	Compensation and employee benefits
Interest cost	8,489		443		796		428		Other non-interest expense
Expected return on plan assets	(20,794)		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		(106)		32		Other non-interest expense
Net loss	3,117		413		323		506		Other non-interest expense
Net periodic (income) benefit cost	$	(1,383)	$	1,138	$	1,430	$	1,340

    The following table summarizes the impact of retrospective application of ASU 2017-07 to the Consolidated Statements of Income for the year ended December 31, 2018:

	Year Ended December 31, 2018
	(In thousands)
Compensation and employee benefits:
As previously reported	$	69,907
As reported under ASU 2017-07	77,226
Other non-interest expense:
As previously reported	$	12,916
As reported under ASU 2017-07	5,597

134

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Notes to Consolidated Financial Statements

(14)    Employee Benefit Plans (continued)

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, Split-Dollar Life Insurance Plans (cont'd)

    The weighted average actuarial assumptions used in the plan determinations at and for the years ended December 31, 2020, 2019, and 2018 were as follows:

	At and For the Years Ended December 31,
	2020
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
Weighted average assumptions used to determine benefit obligation:
Discount rate	2.920	%	2.670	%	2.590	%	3.010	%
Rate of compensation increase	3.750		3.750		N/A		3.750
Weighted average assumptions used to determine net periodic benefit cost:
Discount Rates:
Benefit obligation	3.490	%	3.330	%	3.270	%	3.540	%
Remeasurement rate	2.740		N/A		N/A		N/A
Service cost	3.660		3.460		3.520		3.710
Remeasurement rate	2.970		N/A		N/A		N/A
Interest cost	3.120		3.000		2.850		3.280
Remeasurement rate	2.220		N/A		N/A		N/A
Expected rate of return on plan assets	6.500		N/A		N/A		N/A
Rate of compensation increase	3.500		3.500		N/A		3.500

	At and For the Years Ended December 31,
	2019
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
Weighted average assumptions used to determine benefit obligation:
Discount rate	3.490	%	3.330	%	3.270	%	3.540	%
Rate of compensation increase	3.500		3.500		N/A		3.500
Weighted average assumptions used to determine net periodic benefit cost:
Discount Rates:
Benefit obligation	4.570	%	4.470	%	4.410	%	4.630	%
Remeasurement rate	3.850		N/A		N/A		N/A
Service cost	4.700		4.570		4.600		4.740
Remeasurement rate	4.040		N/A		N/A		N/A
Interest cost	4.250		4.180		4.050		4.390
Remeasurement rate	3.440		N/A		N/A		N/A
Expected rate of return on plan assets	7.000		N/A		N/A		N/A
Rate of compensation increase	3.500		3.500		N/A		3.500

135

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(14)    Employee Benefit Plans (continued)

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, Split-Dollar Life Insurance Plans (cont'd)

	At and For the Years Ended December 31,
	2018
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
Weighted average assumptions used to determine benefit obligation:
Discount rate	4.570	%	4.470	%	4.410	%	4.630	%
Rate of compensation increase	3.500		3.500		N/A		3.500
Weighted average assumptions used to determine net periodic benefit cost:
Discount Rates:
Benefit obligation	3.750	%	4.470	%	3.625	%	3.750	%
Service cost	N/A		4.570		N/A		N/A
Interest cost	N/A		4.180		N/A		N/A
Expected rate of return on plan assets	7.250		N/A		N/A		N/A
Rate of compensation increase	3.500		3.500		N/A		3.500

    The Company provides its actuaries with certain rate assumptions used in measuring the respective benefit obligations. The most significant of these is the discount rate used to calculate the period-end present value of the benefit obligations, and the expense to be included in the following year's financial statements. A lower discount rate will result in a higher benefit obligation and expense, while a higher discount rate will result in a lower benefit obligation and expense. The discount rate assumption was determined based on a cash flow-yield curve model specific to the Company's pension and post-retirement plans.

    The Company compares this rate to certain market indices, such as long-term treasury bonds, or pension liability indices, for reasonableness. The Company's expected return on plan assets assumption is based on historical investment return rate experience and evaluation of input from the trustee managing the pension plan's assets and the Bank's Pension Committee which has responsibility for managing these assets. The expected return on pension plan assets is also impacted by the target allocation of assets, which is based on the Company's goal of earning the highest rate of return while maintaining risk at acceptable levels.

     Assumed health care cost trend rates have a significant effect on the amounts reported for health care plans. A 1% change in the assumed health care cost trend rate would have the following effects on post-retirement benefits at December 31, 2020:

	1% increase		1% decrease
	(In thousands)
Effect on total service cost and interest cost	$	19	$	(16)
Effect on post-retirement benefit obligations	175		(154)

136

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(14)    Employee Benefit Plans (continued)

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, Split-Dollar Life Insurance Plans (cont'd)

Estimated future benefit payments, which reflect expected future service, as appropriate for the next five years and thereafter are as follows:

	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
	(In thousands)
2021	$	8,568	$	384	$	1,490	$	270
2022	9,141		436		1,525		312
2023	9,847		534		1,559		363
2024	10,592		673		1,622		412
2025	11,388		778		1,675		461
2026 - 2030	68,978		4,415		8,820		3,179

    The weighted average asset allocation of pension assets at December 31, 2020 and 2019 were as follows:

	December 31,
	2020		2019
Domestic equities	44.1	%	39.6	%
Foreign equities	13.4	%	9.6	%
Fixed income	37.8	%	44.3	%
Real estate	4.4	%	6.1	%
Cash	0.3	%	0.4	%
Total	100.0	%	100.0	%

    Management, under the direction of the Pension Committee, strives to have pension assets sufficiently diversified so that adverse or unexpected results from one security class will not have a significant detrimental impact on the entire portfolio. The target allocation of assets and acceptable ranges around the targets are as follows:

	Allowable Range
Equities	40-60%
Fixed income	40-60%
Real estate	0-10%
Cash	0-15%

    The Pension Committee engages an investment management advisory firm to regularly monitor the performance of the asset managers and ensure they are within compliance with policy. The maximum and minimum of the range for each class is based on the fair value of the assets in the fund. If changes in fair value should lead to allocations outside these boundaries, management shall adjust exposure back to the established guidelines within 90 days or reevaluate the guidelines.

    The following tables present the assets that are measured at fair value on a recurring basis by level within the U.S. GAAP fair value hierarchy as reported on the Statements of Net Assets Available for Plan Benefits at December 31, 2020 and 2019, respectively. A financial instrument's level within the fair value hierarchy's is based on the lowest level of input that is significant to the fair value measurement.

137

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Notes to Consolidated Financial Statements

(14)    Employee Benefit Plans (continued)

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, Split-Dollar Life Insurance Plans (cont'd)

	December 31, 2020
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Money market mutual funds	$	1,434	$	1,434	$	—	$	—
Mutual funds - value stock fund	29,914		29,914		—		—
Mutual funds - fixed income	155,864		155,864		—		—
Mutual funds - international stock	55,300		55,300		—		—
Mutual funds - institutional stock index	151,436		151,436		—		—
Commingled real estate funds	17,959		—		17,959		—
	$	411,907	$	393,948	$	17,959	$	—

	December 31, 2019
			Fair Value Measurements
	Fair value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Money market mutual funds	$	1,462	$	1,462	$	—	$	—
Mutual funds - value stock fund	27,827		27,827		—		—
Mutual funds - fixed income	158,030		158,030		—		—
Mutual funds - international stock	34,332		34,332		—		—
Mutual funds - institutional stock index	113,100		113,100		—		—
Commingled real estate funds	21,596		—		21,596		—
	$	356,347	$	334,751	$	21,596	$	—

    Money market and other mutual funds are reported at fair value in the tables above utilizing exchange quoted prices in active markets for identical instruments (Level 1 inputs). The commingled real estate funds are reported at their respective net asset values (Level 2 inputs).

Bank-owned life insurance ("BOLI")

    The Company has BOLI which is a tax-advantaged transaction that is used to partially fund obligations associated with employee compensation and benefit programs. Policies are purchased insuring officers of the Company using a single premium method of payment. BOLI is accounted for using the cash surrender value and the increase in cash surrender value is included in non-interest income in the Company's Consolidated Statements of Income. At December 31, 2020 and 2019, the Company had $232.8 million and $211.4 million, respectively, in BOLI. BOLI income for the years ended December 31, 2020, 2019, and 2018 was $6.6 million, $5.8 million, and $5.2 million, respectively.

138

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(14)    Employee Benefit Plans (continued)

Savings Income Maintenance Deferred Compensation Plan (the "SIM Plan")

    The Company also maintains a non-qualified defined contribution plan that provides supplemental benefits to certain executives who are prevented from receiving the full benefits contemplated by the 401(k) Plan under tax law limits for tax-qualified plans. The contribution expense for the years ended December 31, 2020, 2019, and 2018 was approximately $4,000, $11,000, and $9,000, respectively.    

401(k) Plan

    The Company has a 401(k) plan covering substantially all employees of the Bank. The Bank may match a percentage of the first 3.00% to 4.50% contributed by participants. The Bank’s matching contribution, if any, is determined by the Board of Directors in its sole discretion. The expense for the years ended December 31, 2020, 2019, and 2018 was approximately $1.7 million, $1.4 million, and $1.3 million,, respectively.

Employee Stock Ownership Plan ("ESOP")

    Effective upon the consummation of the Company's reorganization in April 2018, an ESOP was established for all eligible employees. The ESOP used $45.4 million in proceeds from a twenty year term loan obtained from the Company to purchase 4,542,855 shares of Company common stock. The term loan principal is payable in installments through April 2038. Interest on the term loan is fixed at a rate of 4.75%.

    Each year, the Bank makes discretionary contributions to the ESOP, which are equal to principal and interest payments required on the term loan. Shares purchased with the loan proceeds were initially pledged as collateral for the term loan and is held in a suspense account for future allocation among participants. Contributions to the ESOP and shares released form the suspense account are allocated among the participants on the basis of compensation, as described by the ESOP, in the year of allocation.

    The ESOP shares pledged as collateral are reported as unearned ESOP shares in the Consolidated Statements of Financial Condition. As shares are committed to be released from collateral, the Bank reports compensation expense equal to the average market price of the shares during the year, and the shares become outstanding for basic net income per common share computations. ESOP compensation expense for the years ended December 31, 2020, 2019, and 2018 was $3.2 million, $3.6 million and $2.6 million, respectively.

    The ESOP shares were as follows:

	December 31,
	2020		2019
	(In thousands)
Allocated shares	606		385
Unearned shares	3,929		4,156
Total ESOP shares	4,535		4,541
Fair value of unearned ESOP shares	$	61,139	$	70,409

    The Company has a SERP, which is a non-qualified plan which provides supplemental retirement benefits to eligible officers (those designated by the Board of Directors) of the Company who are prevented from receiving the full benefits contemplated by the ESOP's benefit formulas under tax law limits for tax-qualified plans. SERP compensation expense for the years ended December 31, 2020, 2019, and 2018 was $215,000, $267,000, and $165,000, respectively.

Through the acquisition of Roselle, the Company acquired a non-contributory defined benefit supplemental executive retirement plan with the only participant being the former president of Roselle Bank. For the year ended December 31, 2020, the Company recorded a net periodic benefit cost of $11,000 in connection with this plan.

139

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(14)    Employee Benefit Plans (continued)

Stock Based Deferral Plan and Directors Deferred Compensation Plan

    In addition, the Bank maintains a stock based deferral plan for certain executives and directors, and a cash based deferred compensation plan for directors. The Company records a deferred compensation equity account and corresponding contra-equity account for the cost of the shares held by the Stock Based Deferral Plan. Periodic adjustments to market are not required as participants do not have the option to take the distribution in cash. The Company records a liability for the amount deferred under the Directors Deferred Compensation Plan. There were no expenses recorded under these plans.

Stock Based Compensation

    At the Company's annual meeting held on June 6, 2019, stockholders approved the Columbia Financial, Inc. 2019 Equity Incentive Plan ("2019 Plan") which provides for the issuance of up to 7,949,996 shares (2,271,427 restricted stock awards and 5,678,569 stock options) of common stock.

    On July 23, 2019, 1,389,570 shares of restricted stock were awarded, with a grant date fair value of $15.60 per share. To fund the grant of restricted common stock, the Company issued shares from authorized unissued shares.

    On December 16, 2019, 74,673 shares of restricted stock were awarded, with a grant date fair value of $17.00 per share. To fund the grant of restricted common stock, the Company reissued shares from treasury stock.

On December 14, 2020, 33,160 shares of restricted stock were awarded, with a grant date fair value of $15.08 per share. To fund the grant, the Company reissued shares from treasury stock.

    Restricted shares granted under the 2019 Plan generally vest in equal installments, over the performance or service periods ranging from 1 year to 5 years, beginning 1 year from the date of grant. A portion of restricted shares awarded are performance vesting awards, which may or may not vest depending upon the attainment of certain corporate financial targets. Management recognizes compensation expense for the fair value of restricted shares on a straight line basis over the requisite performance or service period. During the years ended December 31, 2020 and 2019, approximately $5.6 million and $2.3 million, respectively, in expense was recognized in regard to these awards. There was no restricted stock expense recorded for the year ended December 31, 2018. The expected future compensation expense related to the 1,263,169 non-vested restricted shares outstanding at December 31, 2020 is approximately $14.6 million over a weighted average period of 3.0 years.

    The following is a summary of the Company's restricted stock activity during the years ended December 31, 2020 and 2019:

	Number of Restricted Shares	Weighted Average Grant Date Fair Value
Non-vested at January 1, 2019	—	$	—
Grants	1,464,243	15.67
Forfeited	(44,231)	15.60
Non-vested at December 31, 2019	1,420,012	$	15.67
Grants	33,160	15.08
Vested	(172,756)	15.66
Forfeited	(17,247)	16.02
Non-vested at December 31, 2020	1,263,169	$	15.66

140

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(14)    Employee Benefit Plans (continued)

Stock Based Compensation (continued)

On July 23, 2019, options to purchase 3,707,901 shares of Company common stock were awarded with a grant date fair value of $4.25 per option. Stock options granted under the 2019 Plan vest in equal installments over the service period of five years beginning one year from the date of grant. Stock options were granted at an exercise price of $15.60, which represents the fair value of the Company's common stock price on the grant date based on the closing market price, and have an expiration period of 10 years. The fair value of stock options granted was estimated utilizing the Black-Scholes option pricing model using the following assumptions: expected life of 6.5 years, risk-free rate of return of 1.90%, volatility of 22.12%, and a dividend yield of 0.00%.

On December 16, 2019, options to purchase 184,378 shares of Company common stock were awarded with a grant date fair value of $4.59 per option. Stock options granted under the 2019 Plan generally vest in equal installments over the service period of five years beginning one year from the date of grant. Stock options were granted at an exercise price of $17.00, which represents the fair value of the Company's common stock price on the grant date based on the closing market price, and have an expiration period of approximately 10 years. The fair value of stock options granted was estimated utilizing the Black-Scholes option pricing model using the following assumptions: expected life of 6.5 years, risk-free rate of return of 1.79%, volatility of 22.23%, and a dividend yield of 0.00%.

    The expected life of the options represents the period of time that stock options are expected to be outstanding and is estimated using the simplified approach, which assumes that all outstanding options will be exercised at the midpoint of the vesting date and full contractual term. The risk-free rate of return is based on the rates on the grant date of a U.S. Treasury Note with a term equal to the expected option life. Since the Company recently converted to a public Company and does not have sufficient historical price data, the expected volatility is based on the historical daily stock prices of a peer group of similar entities based on factors such as industry, stage of life cycle, size and financial leverage. The Company has not paid any cash dividends on its common stock.

Management recognizes expense for the fair value of these awards on a straight line basis over the requisite service period. During the years ended December 31, 2020 and 2019, approximately $3.2 million and $1.4 million, respectively, in expense was recognized in regard to these awards. There was no stock option expense recorded for the year ended December 31, 2018. The expected future compensation expense related to the 2,965,330 non-vested options outstanding at December 31, 2020 is $11.3 million over a weighted average period of 3.6 years.

The following is a summary of the Company's option activity during the years ended December 31, 2020 and 2019:

	Number of Stock Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding January 1, 2019	—	$	—	—	$	—
Granted	3,892,279	15.60		9.6	—
Forfeited	(108,235)	15.60		—	—
Outstanding, December 31, 2019	3,784,044	$	15.67	9.6	$	4,812,490
Expired	(10,457)	15.98		—	—
Forfeited	(64,959)	15.84		—	—
Outstanding, December 31, 2020	3,708,628	$	15.66	8.6	$	—
Options exercisable at December 31, 2020	743,298	$	15.66	8.5	$	—

    The aggregate intrinsic value in the table above represents the total pre-tax intrinsic value, the difference between the Company's closing stock price on the last trading day of the period and the exercise price, multiplied by the number of in-the-money options.

    There were no stock option exercises during the years ended December 31, 2020, 2019 and 2018.

(15)    Income Taxes

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Notes to Consolidated Financial Statements

    The current and deferred amounts of income tax expense (benefit) for the years ended December 31, 2020, 2019, and 2018 are as follows:

	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Current:
Federal	$	5,072	$	5,933	$	11,284
State	3,844		2,905		5,129
Total current	8,916		8,838		16,413
Deferred:
Federal	9,847		8,275		(4,901)
State	(109)		(748)		(589)
Total deferred	9,738		7,527		(5,490)
Total income tax expense	$	18,654	$	16,365	$	10,923

    The Company reported deferred tax expense (benefit) of $(5.6) million, $(5.5) million, and $1.4 million for the years ended December 31, 2020, 2019, and 2018, respectively, related to the unrealized gains (losses) on securities available for sale, which is reported in accumulated other comprehensive income (loss), net of tax. Additionally, the Company recorded a deferred tax (benefit) expense of $900,000, $779,000, and $(530,000), respectively, related to the reclassification adjustment of actuarial net (loss) gain on employee benefit obligations, which is reported in accumulated other comprehensive income, net of tax. Deferred tax expense for the years ended December 31, 2020 and 2019 also includes $5.4 million and $2.3 million, respectively, recorded as a result of purchase accounting related to the Roselle and Stewardship acquisitions.

    A reconciliation between the amount of reported total income tax expense and the amount computed by multiplying the applicable statutory federal income tax rate of 21% is as follows:

	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Tax expense at applicable statutory rate	$	16,013	$	14,927	$	7,067
Increase (decrease) in taxes resulting from:
State tax, net of federal income tax benefit	2,951		1,704		3,587
ESOP fair market value adjustment	187		272		202
Tax exempt interest income	(11)		(6)		(4)
Income from Bank-owned life insurance	(1,075)		(1,246)		(812)
Dividend received deduction	(9)		(8)		(16)
Non-deductible merger-related expenses	42		222		—
Non-deductible compensation expense	—		398		—
Other, net	556		102		899
Total income tax expense	$	18,654	$	16,365	$	10,923

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Notes to Consolidated Financial Statements

(15)    Income Taxes (continued)

The net deferred tax asset is included in other assets in the Consolidated Statements of Financial Condition. The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2020 and 2019 are as follows:

	At December 31,
	2020		2019
	(In thousands)
Deferred tax assets:
Allowance for loan losses	$	20,878	$	13,114
Post-retirement benefits	5,928		4,089
Deferred compensation	2,779		2,085
Depreciation	—		1,002
Retirement Income Maintenance plan	2,471		1,725
ESOP	624		301
Stock-based compensation	2,724		788
Reserve for uncollected interest	126		54
Net unrealized losses on debt securities and defined benefit plans	18,511		18,374
Federal and State NOLs	9,719		2,063
Alternative minimum assessment carryforwards	2,156		2,156
Charitable contribution carryforward	6,359		5,981
Purchase accounting	1,024		—
Lease liability	5,609		—
Other items	3,215		332
Gross deferred tax assets	82,123		58,999
Valuation allowance	(3,411)		(7,442)
	78,712		51,557
Deferred tax liabilities:
Pension expense	49,225		33,856
Depreciation	6,118		—
Deferred loan costs	8,555		5,911
Intangible assets	1,597		1,215
Lease right-of-use asset	5,317		—
Other items	716		266
Total gross deferred tax liabilities	71,528		41,248
Net deferred tax asset	$	7,184	$	10,309

    Retained earnings at December 31, 2020 and 2019 includes approximately $21.5 million for which no provision for income tax has been made. This amount represents an allocation of income to bad debt deductions for tax purposes only. Events that would result in taxation of these reserves include the failure to qualify as a bank for tax purposes, distributions in complete or partial liquidation, stock redemptions and excess distributions to stockholders.

    Management believes that not all existing net deductible temporary differences that comprise the net deferred tax asset will reverse during periods in which the Company generates sufficient net taxable income. Accordingly, management has established a valuation allowance. Significant changes in the Company's operations and or economic conditions could affect the benefits of the recognized net deferred tax asset. Based on all available evidence, a valuation allowance was established for the portion of the state tax benefit that is not more likely than not to be realized. At December 31, 2020 and 2019, the Company's valuation allowance totaled $3.4 million and $7.4 million, respectively. Based upon projections of future taxable income and the ability to carryforward net

143

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Notes to Consolidated Financial Statements

(15)    Income Taxes (continued)

operating losses indefinitely, management believes it is more likely than not the Company will realize the remaining deferred tax assets.

    The Company had federal net operating losses from the acquisition of Roselle of approximately $11.9 million at December 31, 2020 and approximately $5.8 million from the acquisition of Stewardship of at December 31, 2019. These net operating losses are subject to a $1.1 million annual limitation under Code Section 382 and will not expire, except for approximately $1.0 million that will begin to expire in 2036.

    The Company had New Jersey net operating loss carryforwards of $108.4 million and $99.8 million, respectively, at December 31, 2020 and 2019. If not utilized, these carryforwards will expire periodically through 2039. At both December 31, 2020 and 2019, the Company had approximately $2.2 million of New Jersey AMA Tax Credits. These credits do not expire.

    The Company files income tax returns in the United States federal jurisdiction and in the states of New Jersey, New York and Pennsylvania. At December 31, 2020, the Company is no longer subject to federal income tax examination for the years prior to 2016. Columbia Bank MHC and its subsidiaries' New York returns are currently under audit for the tax years 2016 and 2017. The Company is open for examination by the State of New Jersey for years after 2015 and by the States of Pennsylvania and New York for years after 2016.

(16)    Financial Transactions with Off-Balance-Sheet Risk and Concentrations of Credit Risk

    The Company is a party to financial instruments with off-balance-sheet risk in the normal course of business in order to meet the financing needs of its customers. These financial instruments consist of commitments to extend credit and involve, to varying degrees, elements of credit and interest rate risk in excess of the amounts recognized in the Consolidated Statements of Financial Condition.

    At December 31, 2020 and 2019, the following commitments existed which are not reflected in the Consolidated Statements of Financial Condition:

	December 31,
	2020		2019
	(In thousands)
Loan commitments:
Residential real estate	$	149,847	$	91,141
Multifamily and commercial real estate	98,910		95,025
Commercial business	16,842		18,737
Construction	13,335		59,990
Consumer including home equity loans and advances	3,264		5,988
Total loan commitments	$	282,198	$	270,881

    Unused lines of credit consisting of home equity lines, and undisbursed business and construction lines totaled approximately $894.5 million and $910.0 million as of December 31, 2020 and 2019, respectively. Amounts drawn on the unused lines of credit are predominantly assessed interest at rates that fluctuate with the base rate.

    The Company uses the same credit policies and collateral requirements in making commitments and conditional obligations as it does for on-balance-sheet loans. Commitments to extend credit are agreements to lend customers as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since the commitments may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer's creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management's credit evaluation of the borrower.

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Notes to Consolidated Financial Statements

(16)    Financial Transactions with Off-Balance-Sheet Risk and Concentrations of Credit Risk (continued)

    The Company principally grants residential real estate loans, multifamily and commercial real estate loans, construction loans, commercial business loans, home equity loans and advances and other consumer loans to borrowers primarily throughout New Jersey, New York and Pennsylvania, and to a much lesser extent in a few other east coast states. Its borrowers' abilities to repay their obligations are dependent upon various factors, including the borrowers' income and net worth, cash flows generated by the underlying collateral, if any, or from business operations, value of the underlying collateral and priority of the Company's lien on the

property. These factors are dependent on various economic conditions and circumstances beyond the Company's control, and as a result, the Company is subject to the risk of loss. The Company believes that its lending policies and procedures adequately minimize the potential exposure to such risks and adequate provisions for loan losses are provided for all probable and estimable losses. In the normal course of business, the Company sells residential real estate loans to third parties. These loan sales are subject to customary representations and warranties. In the event that the Company is found to be in breach of these representations and warranties, it may be obligated to repurchase certain of these loans.

    The Company has entered into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. The Company's derivative financial instruments are used to manage differences in the amount, timing, and duration of the Company's known or expected cash receipts and its known or expected cash payments principally related to the Company's borrowings. These derivatives were used to hedge the variability in cash flows associated with certain short-term funding transactions. The fair value of the derivatives as of December 31, 2020 and 2019 was a net liability of $23.0 million and $11.4 million, respectively, net of accrued interest and variation margin posted in accordance with the Chicago Mercantile Exchange.

    In connection with its mortgage banking activities, at December 31, 2020 the Company had no commitments to sell loans, with servicing retained by the Bank. At December 31, 2020, the Company had commitments classified as held-for-sale, to sell the loans without servicing retained by the Bank.

    In addition to the commitments noted above, the Company is party to standby letters of credit which are conditional commitments issued by the Bank to guarantee the performance of a customer to a third party. The guarantees generally extend for a term of up to one year and may be secured or unsecured. Outstanding letters of credit totaled $9.4 million and $8.4 million at December 31, 2020 and 2019, respectively.

    In the normal course of business, there are outstanding various legal proceedings, claims, and contingent liabilities which are not included in the consolidated financial statements. In the opinion of management, the financial position of the Company will not be materially affected by the outcome of such legal proceedings and claims.

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Notes to Consolidated Financial Statements

(17)    Fair Value Measurements

    The Company utilizes fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. The determination of fair values of financial instruments often requires the use of estimates. Where quoted market values in an active market are not readily available, the Company utilizes various valuation techniques to estimate fair value.

    In January 2016, the FASB issued ASU 2016-01- "Financial Instruments". This guidance amended existing guidance to improve accounting standards for financial instruments including clarification and simplification of the accounting and disclosure requirements and the requirement to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. The Company adopted the guidance effective January 1, 2019, and the fair value of the Company's loan portfolio is now presented using an exit price method.

    Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. There are three levels of inputs that may be used to measure the fair values:

Level 1: Unadjusted quoted prices for identical assets or liabilities in active markets that the Company has the ability to access on the measurement date.

Level 2: Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These might include quoted prices for similar instruments in markets that are active or not active, or inputs that are observable or can be corroborated by observable market data for substantially the full term of the asset or liability.

Level 3: Prices or valuation techniques that require unobservable inputs that are both significant to the fair value measurement and unobservable (i.e., supported by minimal or no market activity). Valuation techniques include the use of option pricing models, discounted cash flow models and similar techniques.

    A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

    The methods described below were used to measure fair value of financial instruments as reflected in the tables below on a recurring basis as of December 31, 2020 and 2019.

Debt Securities Available for Sale, at Fair Value

    For debt securities available for sale, fair value was estimated using a market approach. The majority of these securities are fixed income instruments that are not quoted on an exchange, but are traded in active markets. Prices for these instruments are obtained through third-party data service providers or dealer market participants with which the Company has historically transacted both purchases and sales of securities. Prices obtained from these sources include market quotations and matrix pricing. Matrix pricing, a Level 2 input, is a mathematical technique used principally to value certain securities to a benchmark or to comparable securities. The Company evaluates the quality of Level 2 matrix pricing through comparison to similar assets with greater liquidity and evaluation of projected cash flows. As the Company is responsible for the determination of fair value, it performs quarterly analysis on the prices received from the pricing service to determine whether the prices are reasonable estimates of fair value. Specifically, the Company compares the prices received from the pricing service to a secondary pricing source. Additionally, the Company compares changes in the reported market values and returns to relevant market indices to assess the reasonableness of the reported prices. The Company’s internal price verification procedures and review of fair value methodology documentation provided by independent pricing services has not historically resulted in an adjustment in the prices obtained from the pricing service. The Company may hold debt instruments issued by the U.S. government and U.S. government-sponsored agencies that are traded in active markets with readily accessible quoted market prices that are considered Level 1 inputs.

146

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(17)    Fair Value Measurements (continued)

Equity Securities, at Fair Value

    The Company holds equity securities that are traded in active markets with readily accessible quoted market prices that are considered Level 1 inputs. A trust preferred security that is not traded in an active market and Federal Home Loan Mortgage Corporation ("FHLMC") and Federal National Mortgage Association ("FNMA") preferred stock, are considered Level 2 instruments. In addition, Level 2 instruments include Atlantic Community Bankers Bank ("ACBB") stock, which is based on redemption at par value and can only be sold to the issuing ACBB or another institution that holds ACBB stock.

Derivatives

    The Company records all derivatives included in other assets and liabilities on the Consolidated Statements of Financial Condition at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting, and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. See note 22 for disclosures related to the accounting treatment for derivatives.

    The fair value of the Company's derivatives is determined using discounted cash flow analysis using observable market-based inputs, which are considered Level 2 inputs.

    The following tables present the assets and liabilities reported on the Consolidated Statements of Financial Condition at their fair values as of December 31, 2020 and 2019, by level within the fair value hierarchy:

	December 31, 2020
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Debt securities available for sale:
U.S. government and agency obligations	$	25,549	$	25,549	$	—	$	—
Mortgage-backed securities and collateralized mortgage obligations	1,200,394		—		1,200,394		—
Municipal obligations	16,862		—		16,862		—
Corporate debt securities	69,477		—		69,477		—
Trust preferred securities	4,670		—		4,670		—
Total debt securities available for sale	1,316,952		25,549		1,291,403		—
Equity securities	5,418		5,072		346		—
Derivative assets	19,425		—		19,425		—
	$	1,341,795	$	30,621	1,311,174		$	—
Derivative liabilities	$	42,384	$	—	$	42,384	$	—

147

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(17)    Fair Value Measurements (continued)

	December 31, 2019
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Debt securities available for sale:
U.S. government and agency obligations	$	42,386	$	42,386	$	—	$	—
Mortgage-backed securities and collateralized mortgage obligations	979,881		—		979,881		—
Municipal obligations	2,284		—		2,284		—
Corporate debt securities	69,180		—		69,180		—
Trust preferred securities	4,605		—		4,605		—
Total debt securities available for sale	1,098,336		42,386		1,055,950		—
Equity securities	2,855		2,587		268		—
Derivative assets	185		—		185		—
	$	1,101,376	$	44,973	$	1,056,403	$	—
Derivative liabilities	$	11,546	$	—	$	11,546	$	—

    There were no Level 3 assets measured at fair value on a recurring basis at December 31, 2020 and 2019.

Assets Measured at Fair Value on a Non-Recurring Basis

    The valuation techniques described below were used to estimate fair value of financial instruments measured on a non-recurring basis as of December 31, 2020 and 2019.

Collateral Dependent Impaired Loans

    Loans which meet certain criteria are evaluated individually for impairment. For loans measured for impairment based on the fair value of the underlying collateral, fair value was estimated using a market approach. The Company measures the fair value of collateral underlying impaired loans primarily through obtaining independent appraisals that rely upon quoted market prices for similar assets in active markets. These appraisals include adjustments, on an individual case-by-case basis, to comparable assets based on the appraisers’ market knowledge and experience, as well as adjustments for estimated costs to sell between 6% and 8%. The Company classifies these loans as Level 3 within the fair value hierarchy.

Mortgage Servicing Rights, Net ("MSR"s")

    Mortgage servicing rights are carried at the lower of cost or estimated fair value. The estimated fair value of MSRs is obtained through an analysis of future cash flows, incorporating assumptions that market participants would use in determining fair value including market discount rates, prepayments speeds, servicing income, servicing costs, default rates and other market driven data, including the market's perception of future interest rate movements. The prepayment speed and the discount rate are considered two of the most significant inputs in the model. A significant degree of judgment is involved in valuing the mortgage servicing rights using Level 3 inputs. The use of different assumptions could have a significant effect on this fair value estimate.

148

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(17)    Fair Value Measurements (continued)

    The following tables present the assets and liabilities reported on the Consolidated Statements of Financial Condition at their fair values on a non-recurring basis at December 31, 2020 and 2019, by level within the fair value hierarchy:

	December 31, 2020
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Mortgage servicing rights	$	1,338	$	—	$	—	$	1,338
	$	1,338	$	—	$	—	$	1,338

	December 31, 2019
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Impaired loans	$	1,063	$	—	$	—	$	1,063
Mortgage servicing rights	681		—		—		681
	$	1,744	$	—	$	—	$	1,744

    The following table presents information for Level 3 assets measured at fair value on a non-recurring basis at December 31, 2020 and 2019:

	December 31, 2020
	Fair Value		Valuation Methodology	Unobservable Inputs	Range of Inputs	Weighted Average
	(Dollars in thousands)
Mortgage servicing rights	$	1,338	Estimated cash flow	Prepayment speeds and discount rates (2)	9.7% - 26.2%	16.7%

	December 31, 2019
	Fair Value		Valuation Methodology	Unobservable Inputs	Range of Inputs	Weighted Average
	(Dollars in thousands)
Impaired loans	$	1,063	Estimated cash flow	Expected value of future cash flows (1)	—%	—%
Mortgage servicing rights	681		Estimated cash flow	Prepayment speeds and discount rates (3)	3.6% - 24.0%	12.7%
(1) Value based on management's estimate of expected future cash flows.
(2) Value of SBA servicing rights based on a discount rate of 10.25%.
(3) Value of SBA servicing rights based on a discount rate of 11.75%.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(17)    Fair Value Measurements (continued)

Other Fair Value Disclosures

    The Company is required to disclose estimated fair value of financial instruments, both assets and liabilities on and off the balance sheet, for which it is practicable to estimate fair value. A description of the valuation methodologies used for those assets and liabilities not recorded at fair value on a recurring or non-recurring basis are set forth below.

Cash and Cash Equivalents

    For cash and due from banks, federal funds sold and short-term investments, the carrying amount approximates fair value due to their nature and short-term maturities.

Debt Securities Held to Maturity

    For debt securities held to maturity, fair value was estimated using a market approach. The majority of the Company’s securities are fixed income instruments that are not quoted on an exchange, but are traded in active markets. Prices for these instruments are obtained through third-party data service providers or dealer market participants with which the Company has historically transacted both purchases and sales of securities. Prices obtained from these sources include market quotations and matrix pricing. Matrix pricing, a Level 2 input, is a mathematical technique used principally to value certain securities to benchmark or to compare securities. The Company evaluates the quality of Level 2 matrix pricing through comparison to similar assets with greater liquidity and evaluation of projected cash flows. As the Company is responsible for the determination of fair value, it performs quarterly analysis on the prices received from the pricing service to determine whether the prices are reasonable estimates of fair value. Specifically, the Company compares the prices received from the pricing service to a secondary pricing source. Additionally, the Company compares changes in the reported market values and returns to relevant market indices to assess the reasonableness of the reported prices. The Company’s internal price verification procedures and review of fair value methodology documentation provided by independent pricing services has not historically resulted in an adjustment in the prices obtained from the pricing service. The Company also holds debt instruments issued by the U.S. government and U.S. government sponsored agencies that are traded in active markets with readily accessible quoted market prices that are considered Level 1 inputs within the fair value hierarchy.

Federal Home Loan Bank Stock ("FHLB")

    The fair value of FHLB stock is based on redemption at par value and can only be sold to the issuing FHLB, to other FHLBs, or to other member banks. As such, the Company's FHLB stock is recorded at cost, or par value, and is evaluated for impairment each reporting period by considering the ultimate recoverability of the investment rather than temporary declines in value. The Company classifies the estimated fair value as Level 2 within the fair value hierarchy.

Loans Receivable

    Fair values are estimated for portfolios of loans with similar financial characteristics. Loans are segregated by type such as commercial mortgage, residential mortgage, commercial, construction, and consumer and other. Each loan category is further segmented into fixed and adjustable rate interest terms and into performing and non-performing categories.

    The fair value of performing loans was estimated using a combination of techniques, including a discounted cash flow model that utilizes a discount rate that reflects the Company's current pricing for loans with similar characteristics and remaining maturity, adjusted by an amount for estimated credit losses inherent in the portfolio at the balance sheet date. The rates take into account the expected yield curve, as well as an adjustment for prepayment risk, when applicable. The Company classifies the estimated fair value of its loan portfolio as Level 3.

    The fair value for significant non-performing loans was based on recent external appraisals of collateral securing such loans, adjusted for the timing of anticipated cash flows. The Company classifies the estimated fair value of its non-performing loan portfolio as Level 3.

Deposits

    The fair value of deposits with no stated maturity, such as demand, money market, and savings and club deposits are payable on demand at each reporting date and classified as Level 2. The estimated fair value of certificates of deposit was based on the discounted value of contractual cash flows. The discount rate was estimated using the Company’s current rates offered for deposits with similar remaining maturities. The Company classifies the estimated fair value of its certificates of deposit portfolio as Level 2.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(17)    Fair Value Measurements (continued)

Borrowings

    The fair value of borrowings was estimated by discounting future cash flows using rates available for debt with similar terms and maturities and is classified by the Company as Level 2 within the fair value hierarchy.

Commitments to Extend Credit and Letters of Credit

    The fair value of commitments to extend credit and letters of credit was estimated using the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the present creditworthiness of the counter-parties. For fixed rate loan commitments, fair value also considers the difference between current levels of interest rates and the committed rates. The fair value estimates of commitments to extend credit and letters of credit are deemed immaterial.

    The following tables present the assets and liabilities reported on the Consolidated Statements of Financial Condition at their fair values as of December 31, 2020 and 2019:

	December 31, 2020
			Fair Value Measurements
	Carrying Value		Total Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Financial assets:
Cash and cash equivalents	$	422,957	$	422,957	$	422,957	$	—	$	—
Debt securities available for sale	1,316,952		1,316,952		25,549		1,291,403		—
Debt securities held to maturity	262,720		277,091		5,001		272,090		—
Equity securities	5,418		5,418		5,072		346
Federal Home Loan Bank stock	43,759		43,759		—		43,759		—
Loans receivable, net	6,107,094		6,394,524		—		—		6,394,524
Derivative assets	19,425		19,425		—		19,425		—
Financial liabilities:
Deposits	$	6,778,624	$	6,793,034	$	—	$	6,793,034	$	—
Borrowings	799,364		808,853		—		808,853		—
Derivative liabilities	42,384		42,384		—		42,384		—

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Notes to Consolidated Financial Statements

(17)    Fair Value Measurements (continued)

	December 31, 2019
			Fair Value Measurements
	Carrying Value		Total Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Financial assets:
Cash and cash equivalents	$	75,547	$	75,547	$	75,547	$	—	$	—
Debt securities available for sale	1,098,336		1,098,336		42,386		1,055,950		—
Debt securities held to maturity	285,756		289,505		19,960		269,545		—
Equity securities	2,855		2,855		2,587		268		—
Federal Home Loan Bank stock	69,579		69,579		—		69,579		—
Loans receivable, net	6,135,857		6,219,008		—		—		6,219,008
Derivative assets	185		185		—		185		—
Financial liabilities:
Deposits	$	5,645,842	$	5,654,075	$	—	$	5,654,075	$	—
Borrowings	1,407,022		1,411,962		—		1,411,962		—
Derivative liabilities	11,546		11,546		—		11,546		—

Limitations

    Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instrument. These estimates do not reflect any premium or discount that could result from offering for sale at one time the Company’s entire holdings of a particular financial instrument. Because limited markets exist for a significant portion of the Company’s financial instruments, fair value estimates are based on judgments regarding future expected loss experience, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Changes in assumptions could significantly affect the estimates.

    Fair value estimates are based on existing on and off balance sheet financial instruments without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. Other significant assets and liabilities that are not considered financial assets or liabilities include goodwill and intangible assets, deferred tax assets or liabilities, office properties and equipment, and bank-owned life insurance.

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Notes to Consolidated Financial Statements

(18)    Selected Quarterly Financial Data (Unaudited)

    The following tables are a condensed summary of certain quarterly results of operations for the years ended December 31, 2020, 2019, and 2018:

	Quarters Ended December 31, 2020
	March 31		June 30		September 30		December 31
	(Dollars in thousands, except per share data)
Total interest income	$	74,690	$	75,587	$	72,933	$	72,501
Total interest expense	23,988		19,716		16,609		13,825
Net interest income	50,702		55,871		56,324		58,676
Provision for credit losses	9,568		5,736		2,516		627
Net interest income after provision for credit losses	41,134		50,135		53,808		58,049
Total non-interest income	6,391		7,008		7,909		9,962
Total non-interest expense	38,508		37,443		41,378		40,810
Income before income tax expense	9,017		19,700		20,339		27,201
Income tax expense	2,252		4,603		5,252		6,547
Net income	$	6,765	$	15,097	$	15,087	$	20,654
Earnings per share - basic and diluted	$	0.06	$	0.14	$	0.14	$	0.19
Weighted average shares outstanding - basic and diluted	108,438,173		111,102,306		110,983,871		108,499,658

	Quarters Ended December 31, 2019
	March 31		June 30		September 30		December 31
	(Dollars in thousands, except per share data)
Total interest income	$	62,887	$	62,732	$	64,438	$	71,026
Total interest expense	20,503		21,889		22,722		23,598
Net interest income	42,384		40,843		41,716		47,428
Provision for loan losses	436		112		1,157		2,519
Net interest income after provision for loan losses	41,948		40,731		40,559		44,909
Total non-interest income	6,037		6,775		10,115		8,709
Total non-interest expense	29,559		31,841		31,064		36,237
Income before income tax expense	18,426		15,665		19,610		17,381
Income tax expense	3,507		3,634		5,392		3,832
Net income	$	14,919	$	12,031	$	14,218	$	13,549
Earnings per share - basic and diluted	$	0.13	$	0.11	$	0.13	$	0.12
Weighted average shares outstanding - basic and diluted	111,536,577		111,553,203		111,371,754		109,958,999

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Notes to Consolidated Financial Statements

(18)    Selected Quarterly Financial Data (Unaudited) (continued)

	Quarters Ended December 31, 2018
	March 31		June 30		September 30		December 31
	(Dollars in thousands, except per share data)
Total interest income	$	51,791	$	55,019	$	57,695	$	61,785
Total interest expense	12,730		14,004		17,112		18,410
Net interest income	39,061		41,015		40,583		43,375
Provision for loan losses	2,000		2,400		1,500		777
Net interest income after provision for loan losses	37,061		38,615		39,083		42,598
Total non-interest income	4,543		5,450		5,290		6,405
Total non-interest expense	26,015		61,768		26,590		31,013
Income (loss) before income tax expense	15,589		(17,703)		17,783		17,990
Income tax expense (benefit)	3,805		(2,961)		6,956		3,123
Net income (loss)	$	11,784	$	(14,742)	$	10,827	$	14,867
Earnings per share - basic and diluted	N/A		$	(0.13)	$	0.10	$	0.13
Weighted average shares outstanding - basic and diluted	N/A		111,360,278		111,389,951		111,423,361

(19)    Earnings per Share

    Basic earnings per share ("EPS") is computed by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the period. For purposes of calculating basic EPS, weighted average common shares outstanding excludes treasury stock, unallocated employee stock ownership plan shares that have not been committed for release and deferred compensation obligations required to be settled in shares of Company stock.

    Diluted EPS is computed using the same method as basic EPS and reflects the potential dilution which could occur if stock options and unvested shares were exercised and converted into common stock. The potentially diluted shares would then be included in the weighted average number of shares outstanding for the period using the treasury stock method.

    The following is a reconciliation of the numerators and denominators of the basic and diluted earnings per share calculations for the years ended December 31, 2020, 2019,and 2018:

	December 31,
	2020		2019		2018
	(In thousands, except share and per share data)
Net income	$	57,603	$	54,717	$	22,736
Shares:
Weighted average shares outstanding - basic	109,755,924		111,101,246		111,395,723
Weighted average dilutive shares outstanding	—		—		—
Weighted average shares outstanding - diluted	109,755,924		111,101,246		111,395,723
Earnings per share:
Basic	$	0.52	$	0.49	$	0.20
Diluted	$	0.52	$	0.49	$	0.20

    For the years ended December 31, 2020 and 2019, the average number of stock options which were anti-dilutive and were not included in the computation of diluted earnings per share, totaled 1,413,818, and 1,111,650, respectively. For the year ended December 31, 2018, the Company did not have any stock options outstanding.

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Notes to Consolidated Financial Statements

(20)    Parent-only Financial Information

    The condensed financial statements of Columbia Financial, Inc. (parent company) are presented below:

Statements of Financial Condition
	December 31,
	2020		2019
	(In thousands)
Assets
Cash and due from banks	$	94,053	$	168,242
Short-term investments	170		127
Total cash and cash equivalents	94,223		168,369
Debt securities available for sale, at fair value	—		1,496
Equity securities, at fair value	1,167		1,282
Investment in subsidiaries	873,629		785,964
Loan receivable from Bank	41,461		42,982
Other assets	9,803		8,431
Total assets	$	1,020,283	$	1,008,524
Liabilities and Stockholders' Equity
Liabilities:
Borrowings	$	6,953	$	23,831
Accrued expenses and other liabilities	2,043		2,176
Total liabilities	8,996		26,007
Stockholders' equity	1,011,287		982,517
Total liabilities and stockholders' equity	$	1,020,283	$	1,008,524

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Notes to Consolidated Financial Statements

(20)    Parent-only Financial Information (continued)

Statements of Comprehensive Income (Loss)
	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Dividends from subsidiary	$	50,000	$	179,000	$	—
Interest income:
Loans receivable	2,047		2,111		1,513
Debt securities available for sale and equity securities	51		51		123
Interest-earning deposits	1		173		871
Total interest income	52,099		181,335		2,507
Interest expense on borrowings	863		176		3,468
Net interest income (expense)	51,236		181,159		(961)
Equity earnings (loss) in subsidiary	8,027		(123,142)		51,401
Non-interest income:
Gain on securities transactions	2		236		—
Change in fair value of equity securities	(115)		65		—
Other non-interest income	—		139		—
Total non-interest income	(113)		440		—
Non-interest expense:
Charitable contribution to foundation	—		—		34,767
Merger-related expenses	280		1,807		—
Other non-interest expense	1,377		1,955		425
Total non-interest expense	1,657		3,762		35,192
Income before income tax benefit	57,493		54,695		15,248
Income tax benefit	110		22		7,488
Net income	57,603		54,717		22,736
Other comprehensive income (loss)	(890)		3,710		(6,487)
Comprehensive income (loss)	$	56,713	$	58,427	$	16,249

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Notes to Consolidated Financial Statements

(20)    Parent-only Financial Information (continued)

Statements of Cash Flows
	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Cash flows from operating activities:
Net income	$	57,603	$	54,717	$	22,736
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of debt issuance costs	—		—		890
Amortization of intangible assets	(278)		(71)		—
Gain on securities transactions	(2)		(236)		—
Change in fair value of equity securities	115		(65)		—
Deferred tax expense (benefit)	1,411		1,453		(6,086)
( Increase) decrease in other assets	(2,675)		(2,026)		1,515
(Decrease) increase in accrued expenses and other liabilities	(647)		3,515		(1,498)
Contribution of common stock to Columbia Bank Foundation	—		—		34,767
Equity in undistributed (earnings) loss of subsidiary	(8,027)		123,142		(51,401)
Net cash provided by operating activities	$	47,500	$	180,429	$	923
Cash flows from investing activities:
Capital contribution to subsidiary	$	—	$	—	$	(246,420)
Proceeds from sales of equity securities	—		1,065		—
Proceeds from paydowns/maturities/calls of debt securities available for sale	1,498		500		1,601
Purchases of debt securities available for sale	—		—		(414)
Purchases of equity securities	—		(416)		—
Loan to ESOP	—		—		(45,428)
Repayment of loan receivable from Bank	1,521		1,457		989
Net cash paid in acquisition	—		(135,410)		—
Net cash provided by (used in) investing activities	$	3,019	$	(132,804)	$	(289,672)
Cash flows from financing activities:
Payments of subordinated debt and trust preferred securities	$	(16,600)	$	—	$	(51,547)
Issuance of common stock in initial public offering	—		—		492,428
Purchase of treasury stock	(108,166)		(55,309)		—
Issuance of common stock allocated to restricted stock award grants	—		21,687		—
Restricted stock forfeitures	(199)		(736)		—
Repurchase of shares for taxes	(181)		—		—
Issuance of treasury stock allocated to restricted stock award grants	481		1,269		—
Net cash (used in) provided by financing activities	$	(124,665)	$	(33,089)	$	440,881

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Notes to Consolidated Financial Statements

(20)    Parent-only Financial Information (continued)

Statements of Cash Flows
	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Net (decrease) increase in cash and cash equivalents	$	(74,146)	$	14,536	$	152,132
Cash and cash equivalents at beginning of year	168,369		153,833		1,701
Cash and cash equivalents at end of period	$	94,223	$	168,369	$	153,833
Acquisition:
Non-cash assets acquired:
Debt securities available for sale	$	—	$	1,998	$	—
Equity securities	—		208		—
Other assets	—		1,492		—
Total non-cash assets acquired	$	—	$	3,698	$	—
Liabilities assumed:
Borrowings	$	—	$	23,901	$	—
Total liabilities assumed	$	—	$	23,901	$	—
Net non-cash liabilities acquired	$	—	$	(20,203)	$	—
Net cash and cash equivalents acquired in acquisitions	$	—	$	884	$	—

158

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Notes to Consolidated Financial Statements

(21)    Other Comprehensive Income (Loss)

    The following tables present the components of other comprehensive income (loss), both gross and net of tax, for the years ended December 31, 2020, 2019, and 2018:

	For the Years Ended December 31,
	2020						2019
	Before Tax		Tax Effect		After Tax		Before Tax		Tax Effect		After Tax
	(In thousands)
Components of other comprehensive income (loss):
Unrealized gains on debt securities available for sale:	$	26,876	$	(5,640)	$	21,236	$	26,601	$	(5,534)	$	21,067
Accretion of unrealized gain on debt securities reclassified as held to maturity	160		(34)		126		11		(2)		9
Reclassification adjustment for gains included in net income	370		(81)		289		2,612		(601)		2,011
	27,406		(5,755)		21,651		29,224		(6,137)		23,087
Derivatives:
Unrealized (loss) on swap contracts accounted for as cash flow hedges	(10,605)		2,223		(8,382)		(8,193)		1,725		(6,468)
Employee benefit plans:
Amortization of prior service cost included in net income	(56)		12		(44)		(56)		12		(44)
Reclassification adjustment of actuarial net (loss) included in net income	(4,284)		900		(3,384)		(3,709)		779		(2,930)
Change in funded status of retirement obligations	(13,583)		2,852		(10,731)		(12,576)		2,641		(9,935)
	(17,923)		3,764		(14,159)		(16,341)		3,432		(12,909)
Total other comprehensive (loss) income	$	(1,122)	$	232	$	(890)	$	4,690	$	(980)	$	3,710

159

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Notes to Consolidated Financial Statements

(21)    Other Comprehensive Income (Loss) (continued)

	For the Year Ended December 31,
	2018
	Before Tax		Tax Effect		After Tax
	(In thousands)
Components of other comprehensive(loss) income:
Unrealized (losses) on debt securities available for sale:	$	(7,224)	$	1,446	$	(5,778)
Accretion of unrealized (loss) on debt securities reclassified as held to maturity	(13)		—		(13)
Reclassification adjustment for (losses) included in net income	(116)		24		(92)
	(7,353)		1,470		(5,883)
Derivatives:
Unrealized (loss)on swap contracts accounted for as cash flow hedges	(2,825)		595		(2,230)
Employee benefit plans:
Amortization of prior service cost included in net income	(623)		132		(491)
Reclassification adjustment of actuarial net loss included in net income	2,526		(530)		1,996
Change in funded status of retirement obligations	897		(776)		121
	2,800		(1,174)		1,626
Total other comprehensive (loss) income	$	(7,378)	$	891	$	(6,487)

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Notes to Consolidated Financial Statements

(21)    Other Comprehensive Income (Loss) (continued)

    The following tables present the changes in the components of accumulated other comprehensive income (loss), net of tax, for the years ended December 31, 2020, 2019, and 2018:

	For the Years Ended December 31,
	2020								2019
	Unrealized Gains on Debt Securities Available for Sale		Unrealized (Losses) on Swaps		Employee Benefit Plans		Accumulated Other Comprehensive (Loss)		Unrealized (Losses) Gains on Debt Securities Available for Sale		Unrealized (Losses) on Swaps		Employee Benefit Plans		Accumulated Other Comprehensive (Loss)
	(In thousands)
Balance at beginning of period	$	9,377	$	(8,474)	$	(69,638)	$	(68,735)	$	(13,162)	$	(2,006)	$	(56,729)	$	(71,897)
Effect of the adoption of ASU 2016-01	—						—		(548)		—		—		(548)
Balance at January 1,	$	9,377	$	(8,474)	$	(69,638)	$	(68,735)	$	(13,710)	$	(2,006)	$	(56,729)	$	(72,445)
Current period changes in other comprehensive income (loss)	21,651		(8,382)		(14,159)		(890)		23,087		(6,468)		(12,909)		3,710
Total other comprehensive income (loss)	$	31,028	$	(16,856)	$	(83,797)	$	(69,625)	$	9,377	$	(8,474)	$	(69,638)	$	(68,735)

	For the Year Ended December 31,
	2018
	Unrealized (Losses) on Debt Securities Available for Sale		Unrealized Gains (Losses) on Swaps		Employee Benefit Plans		Accumulated Other Comprehensive (Loss)
	(In thousands)
Balance at beginning of period	$	(7,279)	$	224	$	(58,355)	$	(65,410)
Current period changes in other comprehensive (loss) income	(5,883)		(2,230)		1,626		(6,487)
Total other comprehensive (loss)	$	(13,162)	$	(2,006)	$	(56,729)	$	(71,897)

161

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Notes to Consolidated Financial Statements

(21)    Other Comprehensive Income (Loss) (continued)

    The following tables reflect amounts reclassified from accumulated other comprehensive income (loss) in the Consolidated Statements of Income and the affected line item in the statement where net income is presented for the years ended December 31, 2020, 2019, and 2018:

	Accumulated Other Comprehensive (Loss) Income Components
	For the Years Ended December 31,						Affected line items in the Consolidated Statements of Income
	2020		2019		2018
	(In thousands)
Reclassification adjustment for gains (losses) included in net income	$	370	$	2,612	$	(116)	Gain (loss) on securities transactions
Reclassification adjustment of actuarial net (loss) gain included in net income	(4,284)		(3,709)		2,526		Other non-interest expense
Total before tax	(3,914)		(1,097)		2,410
Income (tax) benefit	819		178		(506)
Net of tax	$	(3,095)	$	(919)	$	1,904

162

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(22)    Derivatives and Hedging Activities

    The Company uses derivative financial instruments as components of its market risk management, principally to manage interest rate risk. Certain derivatives are entered into in connection with transactions with commercial customers. Derivatives are not used for speculative purposes. All derivatives are recognized as either assets or liabilities in the Consolidated Statements of Financial Condition, reported at fair value and presented on a gross basis. Until a derivative is settled, a favorable change in fair value results in an unrealized gain that is recognized as an asset, while an unfavorable change in fair value results in an unrealized loss that is recognized as a liability.

    The Company generally applies hedge accounting to its derivatives used for market risk management purposes. Hedge accounting is permitted only if specific criteria are met, including a requirement that a highly effective relationship exists between the derivative instrument and the hedged item, both at inception of the hedge and on an ongoing basis. Changes in the fair value of effective fair value hedges are recognized in current earnings (with the change in fair value of the hedged asset or liability also recognized in earnings). Changes in the fair value of effective cash flow hedges are recognized in other comprehensive income (loss) until earnings are affected by the variability in cash flows of the designated hedged item. Ineffective portions of hedge results are recognized in current earnings. Changes in the fair value of derivatives for which hedge accounting is not applied are recognized in current earnings.

The Company formally documents at inception all relationships between the derivative instruments and the hedged items, as well as its risk management objectives and strategies for undertaking the hedge transactions. This process includes linking all derivatives that are designated as hedges to specific assets and liabilities, or to specific firm commitments. The Company also formally assesses, both at inception of the hedge and on an ongoing basis, whether the derivatives that are used in hedging transactions are highly effective in offsetting changes in the fair values or cash flows of the hedged items. If it is determined that a derivative is not highly effective or has ceased to be a highly effective hedge, the Company would discontinue hedge accounting prospectively. Gains or losses resulting from the termination of a derivative accounted for as a cash flow hedge remain in other comprehensive income (loss) and is (accreted) amortized to earnings over the remaining period of the former hedging relationship.

Certain derivative financial instruments are offered to certain commercial banking customers to manage their risk of exposure and risk management strategies. These derivative instruments consist primarily of currency forward contracts and interest rate swap contracts. The risks associated with these transactions is mitigated by simultaneously entering into similar transactions having essentially offsetting terms with a third party. In addition, the Company executes interest rate swaps with third parties in order to hedge the interest rate risk of short-term FHLB advances.

    Currency Forward Contracts. At December 31, 2020 and 2019, the Company had no currency forward contracts in place with commercial banking customers.

    Interest Rate Swaps. At December 31, 2020, the Company had interest rate swaps in place with 48 commercial banking customers executed by offsetting interest rate swaps with third parties, with an aggregated notional amount of $175.1 million. At December 31, 2019, the Company had interest rate swaps in place with 22 commercial banking customers executed by offsetting interest rate swaps with third parties, with an aggregated notional amount of $169.9 million. These derivatives are not designated as hedges and are not speculative. These interest rate swaps do not meet hedge accounting requirements.

    At December 31, 2020 and 2019, the Company had 31 and 29 interest rate swaps with notional amounts of $430.0 million and $410.0 million, respectively, hedging certain FHLB advances. These interest rate swaps meet the hedge accounting requirements. Interest rate swaps designated as cash flow hedges involve the receipt of variable amounts from counter-party in exchange for the Company making fixed-rate payments over the life of the agreements without the exchanges of the underlying notional amount.

    For the years ended December 31, 2020, 2019, and 2018, the Company did not record any hedge ineffectiveness associated with these contracts.

163

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Notes to Consolidated Financial Statements

(22)    Derivatives and Hedging Activities (continued)

    The tables below present the fair value of the Company’s derivative financial instruments as well as their classification in the Consolidated Statements of Financial Condition at December 31, 2020 and 2019:

	December 31, 2020
	Asset Derivative			Liability Derivative
	Consolidated Statements of Financial Condition	Fair Value		Consolidated Statements of Financial Condition	Fair Value
	(In thousands)
Derivatives:
Interest rate swaps	Other Assets	$	19,425	Other Liabilities	$	42,384
Total derivative instruments		$	19,425		$	42,384
	December 31, 2019
	Asset Derivative			Liability Derivative
	Consolidated Statements of Financial Condition	Fair Value		Consolidated Statements of Financial Condition	Fair Value
	(In thousands)
Derivatives:
Interest rate swaps	Other Assets	$	185	Other Liabilities	$	11,546
Total derivative instruments		$	185		$	11,546

    For the years ended December 31, 2020, 2019, and 2018 losses/(gains) of $306,000, $204,000, and $(52,000) respectively, were recorded for changes in fair value of interest rate swaps with third parties.

    At December 31, 2020 and 2019, accrued interest was $1.0 million and $344,000, respectively.

    The Company has agreements with counterparties that contain a provision that if the Company defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default of its derivative obligations.

    At December 31, 2020, the termination value of derivatives in a net liability position, which includes accrued interest, was $21.9 million. The Company has collateral posting thresholds with certain of its derivative counterparties, and has posted collateral of $41.2 million against its obligations under these agreements.

164

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Notes to Consolidated Financial Statements

(23)    Revenue Recognition

    On January 1, 2019, the Company adopted ASU 2014-09 Revenue from Contracts with Customers (Topic 606) and all subsequent ASUs that modified Topic 606. The Company performed a review and assessment of all revenue streams, the related contracts with customers, and the underlying performance obligations in those contracts. This guidance does not apply to revenue associated with financial instruments, including interest income on loans and securities, which comprise the majority of the Company's revenue. Revenue-generating activities that are within the scope of Topic 606, are components of non-interest income. These revenue streams can generally be classified as demand deposit account fees, title insurance fees and other fees.

    The Company, using a modified retrospective transition approach, determined that there was no cumulative effect adjustment to retained earnings as a result of adopting the new standard, nor did the standard have a material impact on our consolidated financial statements including the timing or amounts of revenue recognized.    

    The following table presents non-interest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the years ended December 31, 2020, 2019, and 2018.

	For the Years Ended December 31,
	2020		2019		2018
	(In thousands)
Non-interest income
In-scope of Topic 606:
Demand deposit account fees	$	3,633	$	4,478	$	3,987
Title insurance fees	5,034		4,981		4,297
Other non-interest income	6,472		4,844		4,679
Total in-scope non-interest income	15,139		14,303		12,963
Total out-of-scope non-interest income	16,131		17,333		8,725
Total non-interest income	$	31,270	$	31,636	$	21,688

    Demand deposit account fees include monthly maintenance fees and service charges. These fees are generally derived as a result of either transaction-based or serviced-based services. The Company's performance obligation for these services is generally satisfied, and revenue recognized, at the time the transaction is completed or the service rendered. Fees for these services are generally received from the customer either at the time of the transaction or monthly.

    Title insurance fees are generally recognized at the time the transaction closes or when the service is rendered.

    Other non-interest income includes check printing fees, traveler's check fees, gift card fees, branch service fees, overdraft fees, account analysis fees, other deposit related fees, wealth management related fee income which includes annuity fees, brokerage commissions, and asset management fees. Wealth management related fee income represent fees earned from customers as consideration for asset management and investment advisory services provided by a third party. The Company's performance obligation is generally satisfied monthly and the resulting fees are recognized monthly based upon the month-end market value of the assets under management and the applicable fee rate. The Company does not earn performance-based incentives. The Company's performance obligation for these transaction-based services are generally satisfied, and related revenue recognized, at the time the transaction closes or when the service is rendered or a point in time when the service is completed.

     Also included in other fees are debit card and ATM fees which are transaction-based. Debit card revenue is primarily comprised of interchange fees earned when a customer's Company card is processed through a card payment network. ATM fees are largely generated when a Company cardholder uses a non-Company ATM, or a non-Company cardholder uses a Company ATM. The Company's performance obligation for these services is satisfied when the service is rendered. Payment is generally received at time of transaction or monthly.

    Out-of-scope non-interest income primarily consists of income from bank-owned life insurance, loan prepayment and servicing fees, net fees loan level swaps, gains and losses on the sale of loans and securities, and changes in the fair value of equity securities. None of these revenue streams are subject to the requirements of Topic 606.

165

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(24)    Subsequent Events

    The Company has evaluated events subsequent to December 31, 2020 and through the financial statement issuance date of March 1, 2021. The Company has not identified any material subsequent events that would require adjustment or disclosure in the consolidated financial statements.

The COVID-19 pandemic has disrupted and adversely affected the Bank's business and results of operations, and the ultimate impacts of the pandemic on the Bank's business, financial condition and results of operations will depend on future developments and other factors that are highly uncertain and will be impacted by the scope and duration of the pandemic and actions taken by governmental authorities in response to the pandemic.

166

SIGNATURES

    Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

COLUMBIA FINANCIAL, INC.

Dated:	March 1, 2021	By:	/s/Thomas J. Kemly
			Thomas J. Kemly
			President and Chief Executive Officer
			(Principal Executive Officer)

    Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

Name	Title	Date
/s/Thomas J. Kemly
Thomas J. Kemly	President and Chief Executive Officer and Director	March 1, 2021
	(Principal Executive Officer)
/s/Dennis E. Gibney
Dennis E. Gibney	Executive Vice President and Chief Financial Officer	March 1, 2021
	(Principal Financial and Accounting Officer)
/s/Noel R. Holland
Noel R. Holland	Chairman of the Board	March 1, 2021
/s/Frank Czerwinski
Frank Czerwinski	Director	March 1, 2021
/s/Michael Massood, Jr.
Michael Massood, Jr.	Director	March 1, 2021
/s/Elizabeth E. Randall
Elizabeth E. Randall	Director	March 1, 2021
/s/Robert Van Dyk
Robert Van Dyk	Director	March 1, 2021
/s/Paul Van Ostenbridge
Paul Van Ostenbridge	Director	March 1, 2021
/s/James Kuiken
James Kuiken	Director	March 1, 2021
/s/Lucy Sorrentini
Lucy Sorrentini	Director	March 1, 2021

167

EX-10.10

EX-21.0

EX-21.0

Subsidiaries of the Registrant

Name	Percent Ownership	State of Incorporation
Columbia Bank	100%	United States of America*
First Jersey Title Services, Inc.	100%	New Jersey**
1901 Commercial Management Company LLC	100%	New Jersey**
1901 Residential Management Company LLC	100%	New Jersey**
Columbia Investment Services, Inc.	100%	New Jersey**
Real Estate Management Corporation, LLC	100%	New Jersey**
Plaza Financial Services, Inc.	100%	New Jersey**
2500 Broadway Corporation	100%	Delaware**
CSB Realty Corporation	100%	Delaware***
Columbia Financial Capital Trust I	100%	Delaware****
Stewardship Realty LLC	100%	New Jersey**
Stewardship Statutory Trust I	100%	Delaware****
* Subsidiary of Columbia Financial, Inc.
** Subsidiary of Columbia Bank
*** Subsidiary of 2500 Broadway Corporation
**** Unconsolidated subsidiary of Columbia Financial, Inc.

EX-23.1

EX-23.1

Consent of Independent Registered Public Accounting Firm

The Board of Directors

Columbia Financial, Inc.:

We consent to the incorporation by reference in the registration statement (No. 333-221912) on Form S-1 and in the registration statements (No. 333-226466 and No. 333-232766) on Form S-8 of Columbia Financial, Inc. of our reports dated March 1, 2021, with respect to the consolidated statements of financial condition of Columbia Financial, Inc. and subsidiaries as of December 31, 2020 and 2019, the related consolidated statements of income, comprehensive income (loss), changes in stockholders’ equity, and cash flows for each of the years in the three-year period ended December 31, 2020, and the related notes, and the effectiveness of internal control over financial reporting as of December 31, 2020, which reports appear in the December 31, 2020 annual report on Form 10-K of Columbia Financial, Inc.

/s/ KPMG LLP

Short Hills, New Jersey

March 1, 2021

EX-31.1

EX-31.1

                    Certification Pursuant to

Exchange Act Rule 13a-14(a) and Rule 15d-14(a)

Certification of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Thomas J. Kemly, certify that:

1.I have reviewed this report on Form 10-K of Columbia Financial, Inc.

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.    designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.    designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.    evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.    disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal year that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors:

a.    all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.    any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	March 1, 2021	/s/Thomas J. Kemly
		Thomas J. Kemly
		President and Chief Executive Officer

EX-31.2

EX-31.2

                    Certification Pursuant to

Exchange Act Rule 13a-14(a) and Rule 15d-14(a)

Certification of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Dennis E. Gibney, certify that:

1.I have reviewed this report on Form 10-K of Columbia Financial, Inc.

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.    designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.    designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.    evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.    disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal year that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

The registrant’s other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors:

a.    all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.    any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	March 1, 2021	/s/Dennis E. Gibney
		Dennis E. Gibney
		Executive Vice President and Chief Financial Officer

EX-32.0

EX-32.0

Certification pursuant to 18 U.S.C. Section 1350,

as adopted pursuant to Section 906

of the Sarbanes-Oxley Act of 2002

Thomas J. Kemly, President and Chief Executive Officer, and Dennis E. Gibney, Executive Vice President and Chief Financial Officer of Columbia Financial Inc. (the “Company”), each certify in his capacity as an officer of the Company that he has reviewed the annual report of the Company on Form 10-K for the year ended December 31, 2020 and that to the best of his knowledge:

(1) the report fully complies with the requirements of Sections 13(a) of the Securities Exchange Act of 1934; and

(2) the information contained in the report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	March 1, 2021	/s/Thomas J. Kemly
		Thomas J. Kemly
		President and Chief Executive Officer
Date:	March 1, 2021	/s/Dennis E. Gibney
		Dennis E. Gibney
		Executive Vice President and Chief Financial Officer

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Cover Page - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Feb. 19, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-38456
Entity Registrant Name	COLUMBIA FINANCIAL, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	22-3504946
Entity Address, Address Line One	19-01 Route 208 North,
Entity Address, City or Town	Fair Lawn,
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	07410
City Area Code	800
Local Phone Number	522-4167
Title of 12(b) Security	Common stock, par value $0.01 per share
Trading Symbol	CLBK
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Filer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 582.8
Entity Common Stock, Shares Outstanding (in shares)		109,673,314
Documents Incorporated by Reference	Portions of the Registrant’s Proxy Statement for the 2021 Annual Meeting of Stockholders are incorporated by reference into Part III of this Form 10-K.
Entity Central Index Key	0001723596
Document Fiscal Year Focus	2020
Document Fiscal Period	FY
Amendment Flag	false

XML

Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets
Cash and due from banks	$ 422,787	$ 75,420
Short-term investments	170	127
Total cash and cash equivalents	422,957	75,547
Debt securities available for sale, at fair value	1,316,952	1,098,336
Debt securities held to maturity, at amortized cost (fair value of $277,091 and $289,505 at December 31, 2020 and 2019, respectively)	262,720	285,756
Equity securities, at fair value	5,418	2,855
Federal Home Loan Bank stock	43,759	69,579
Loans held-for-sale, at fair value	4,146	0
Loans receivable	6,181,770	6,197,566
Less: allowance for credit losses	74,676	61,709
Loans receivable, net	6,107,094	6,135,857
Accrued interest receivable	29,456	22,092
Office properties and equipment, net	75,974	72,967
Bank-owned life insurance	232,824	211,415
Goodwill and intangible assets	87,384	68,582
Other assets	209,852	145,708
Total assets	8,798,536	8,188,694
Liabilities:
Deposits	6,778,624	5,645,842
Borrowings	799,364	1,407,022
Advance payments by borrowers for taxes and insurance	32,570	35,507
Accrued expenses and other liabilities	176,691	117,806
Total liabilities	7,787,249	7,206,177
Stockholders' equity:
Preferred stock, $0.01 par value. 10,000,000 shares authorized; none issued and outstanding at December 31, 2020 and 2019	0	0
Common stock, $0.01 par value. 500,000,000 shares authorized; 122,037,793 shares issued and 110,939,753 shares outstanding at December 31, 2020, and 117,278,745 shares issued and 113,765,387 shares outstanding at December 31, 2019	1,220	1,173
Additional paid-in capital	609,531	531,667
Retained earnings	673,084	615,481
Accumulated other comprehensive loss	(69,625)	(68,735)
Treasury stock, at cost; 11,098,040 shares at December 31, 2020 and 3,513,358 shares at December 31, 2019	(163,015)	(54,950)
Common stock held by the Employee Stock Ownership Plan	(39,293)	(41,564)
Stock held by Rabbi Trust	(1,875)	(1,520)
Deferred compensation obligations	1,260	965
Total stockholders' equity	1,011,287	982,517
Total liabilities and stockholders' equity	$ 8,798,536	$ 8,188,694

XML

Consolidated Statements of Financial Condition (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets
Debt securities held to maturity	$ 277,091	$ 289,505
Stockholders' equity:
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, shares issued (in shares)	122,037,793	117,278,745
Common stock, shares outstanding (in shares)	110,939,753	113,765,387
Treasury stock, shares (in shares)	11,098,040	3,513,358

XML

Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest income:
Loans receivable	$ 255,236	$ 217,774	$ 189,869
Debt securities available for sale and equity securities	28,376	30,938	25,338
Debt securities held to maturity	8,025	8,180	7,147
Federal funds and interest-earning deposits	413	594	1,175
Federal Home Loan Bank stock dividends	3,661	3,597	2,761
Total interest income	295,711	261,083	226,290
Interest expense:
Deposits	55,246	61,551	39,523
Borrowings	18,892	27,161	22,733
Total interest expense	74,138	88,712	62,256
Net interest income	221,573	172,371	164,034
Provision for loan losses	18,447	4,224	6,677
Net interest income after provision for credit losses	203,126	168,147	157,357
Non-interest income:
Bank-owned life insurance	6,620	5,846	5,208
Gain on securities transactions	370	2,612	116
Change in fair value of equity securities	767	305	0
Gain on sale of loans	5,444	785	618
Other non-interest income	6,983	5,922	4,943
Total non-interest income	31,270	31,636	21,688
Non-interest expense:
Compensation and employee benefits	100,687	84,256	77,226
Occupancy	19,170	16,180	14,547
Federal deposit insurance premiums	1,901	895	1,893
Advertising	2,641	3,932	4,137
Professional fees	5,810	5,913	4,619
Data processing	3,342	3,001	2,600
Charitable contribution to foundation	0	0	34,767
Merger-related expenses	1,931	2,755	0
Loss on extinguishment of debt	1,158	0	0
Other non-interest expense	21,499	11,769	5,597
Total non-interest expense	158,139	128,701	145,386
Income before income tax expense	76,257	71,082	33,659
Income tax expense	18,654	16,365	10,923
Net income	$ 57,603	$ 54,717	$ 22,736
Earnings per share - basic and diluted (in dollars per share)	$ 0.52	$ 0.49	$ 0.20
Weighted average shares outstanding - basic and diluted (in shares)	109,755,924	111,101,246	111,395,723
Demand deposit account fees
Non-interest income:
Revenue	$ 3,633	$ 4,478	$ 3,987
Title insurance fees
Non-interest income:
Revenue	5,034	4,981	4,297
Loan fees and service charges
Non-interest income:
Revenue	$ 2,419	$ 6,707	$ 2,519

XML

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 57,603	$ 54,717	$ 22,736
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on debt securities available for sale	21,236	21,067	(5,778)
Accretion of unrealized gain (loss) on debt securities reclassified as held to maturity	126	9	(13)
Reclassification adjustment for gain (loss) included in net income	289	2,011	(92)
Total other comprehensive (loss) income, available-for-sale securities and held-to-maturity adjustments, net of tax	21,651	23,087	(5,883)
Derivatives, net of tax:
Unrealized (loss) on swap contracts accounted for as cash flow hedges	(8,382)	(6,468)	(2,230)
Total derivative, net of tax	(8,382)	(6,468)	(2,230)
Employee benefit plans, net of tax:
Amortization of prior service cost included in net income	(44)	(44)	(491)
Reclassification adjustment of actuarial net (loss) gain included in net income	(3,384)	(2,930)	1,996
Change in funded status of retirement obligations	(10,731)	(9,935)	121
Total employee benefit plans, net of tax	(14,159)	(12,909)	1,626
Total other comprehensive (loss) income	(890)	3,710	(6,487)
Total comprehensive income, net of tax	$ 56,713	$ 58,427	$ 16,249

XML

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	IPO	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common Stock IPO	Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Additional Paid-in-Capital	Additional Paid-in-Capital IPO	Additional Paid-in-Capital Cumulative Effect, Period of Adoption, Adjusted Balance	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive (Loss)	Accumulated Other Comprehensive (Loss) Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive (Loss) Cumulative Effect, Period of Adoption, Adjusted Balance	Treasury Stock	Treasury Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock Held by the Employee Stock Ownership Plan	Common Stock Held by the Employee Stock Ownership Plan Cumulative Effect, Period of Adoption, Adjusted Balance	Stock Held by Rabbi Trust	Stock Held by Rabbi Trust Cumulative Effect, Period of Adoption, Adjusted Balance	Deferred Compensation Obligations	Deferred Compensation Obligations Cumulative Effect, Period of Adoption, Adjusted Balance	Columbia Bank, MHC	Columbia Bank, MHC Common Stock	Columbia Bank Foundation	Columbia Bank Foundation Common Stock	Columbia Bank Foundation Additional Paid-in-Capital
Balance at beginning of period at Dec. 31, 2017	$ 472,070				$ 0			$ 0			$ 537,480			$ (65,410)			$ 0		$ 0		$ 0		$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	22,736										22,736
Other comprehensive income (loss)	(6,487)													(6,487)
Issuance of common stock		$ 491,802				$ 498			$ 491,304																$ 626	$ 626	$ 34,767	$ 35	$ 34,732
Repurchase shares for taxes	(45,428)							0											(45,428)
Employee Stock Ownership Plan shares committed to be released	2,594							1,001											1,593
Funding of deferred compensation obligations	(620)																				(1,259)		639
Balance at end of year at Dec. 31, 2018	$ 972,060		$ 0	$ 972,060	1,159		$ 1,159	527,037		$ 527,037	560,216	$ 548	$ 560,764	(71,897)	$ (548)	$ (72,445)	0	$ 0	(43,835)	$ (43,835)	(1,259)	$ (1,259)	639	$ 639
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201601Member
Issuance of common stock (in shares)						49,832,345																				62,580,155		3,476,675
Net income	$ 54,717										54,717
Other comprehensive income (loss)	3,710													3,710
Issuance of common stock	14				14
Treasury stock allocated to restricted stock award grants	0							(1,095)									1,095
Stock based compensation	3,694							3,694
Purchase of treasury stock shares	(55,309)																(55,309)
Restricted stock forfeitures	0							736									(736)
Employee Stock Ownership Plan shares committed to be released	3,566							1,295											2,271
Funding of deferred compensation obligations	65																				(261)		326
Balance at end of year at Dec. 31, 2019	$ 982,517				1,173			531,667			615,481			(68,735)		$ (68,735)	(54,950)		(41,564)		(1,520)		965
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)	1,464,243
Net income	$ 57,603										57,603
Other comprehensive income (loss)	(890)													(890)
Issuance of common stock	68,530				47			68,483
Treasury stock allocated to restricted stock award grants	0							(481)									481
Stock based compensation	8,790							8,790
Purchase of treasury stock shares	(108,166)																(108,166)
Restricted stock forfeitures	(24)							175									(199)
Repurchase shares for taxes	(174)							7									(181)
Employee Stock Ownership Plan shares committed to be released	3,161							890											2,271
Funding of deferred compensation obligations	(60)																				(355)		295
Balance at end of year at Dec. 31, 2020	$ 1,011,287				$ 1,220			$ 609,531			$ 673,084			$ (69,625)			$ (163,015)		$ (39,293)		$ (1,875)		$ 1,260
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)	4,759,048

XML

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2018
Issuance of common stock (in shares)	4,759,048
Treasury stock, shares purchased (in shares)	7,587,142
Restricted stock, shares forfeited (in shares)	17,247	44,231
Repurchased shares for taxes (in shares)	13,453
Common Stock | IPO
Issuance of common stock (in shares)		49,832,345
Columbia Bank, MHC | Common Stock
Issuance of common stock (in shares)		62,580,155
Columbia Bank Foundation | Common Stock
Issuance of common stock (in shares)		3,476,675

XML

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income	$ 57,603,000	$ 54,717,000	$ 22,736,000
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of deferred loan fees, costs, and purchased premiums and discounts	(1,464,000)	1,205,000	1,965,000
Net amortization of premiums and discounts on securities	2,508,000	1,160,000	1,212,000
Net amortization of mortgage servicing rights	130,000	(109,000)	(88,000)
Amortization of debt issuance costs	0	0	890,000
Amortization of intangible assets	1,048,000	222,000	0
Depreciation and amortization of office properties and equipment	6,543,000	4,880,000	3,839,000
Amortization of operating lease right-of-use assets	2,641,000	0	0
Provision for loan losses	18,447,000	4,224,000	6,677,000
Gain on securities transactions	(370,000)	(2,612,000)	(116,000)
Change in fair value of equity securities	(767,000)	(305,000)	0
Gain on securitizations	(3,544,000)	0	0
Gain on sale of loans	(1,900,000)	(785,000)	(618,000)
Loss on real estate owned	0	1,000	56,000
Loss on write-down of real estate owned	0	0	55,000
Loss (gain) on disposal of office properties and equipment	734,000	3,000	(5,000)
Loss on write-down of office properties and equipment	114,000	0	0
Loss on write-down of mortgage servicing rights	75,000	0	0
Deferred tax expense (benefit)	9,738,000	7,527,000	(5,490,000)
(Increase) in accrued interest receivable	(6,685,000)	(959,000)	(2,979,000)
(Increase) in other assets	(75,127,000)	(51,856,000)	(11,053,000)
Increase in accrued expenses and other liabilities	32,891,000	3,032,000	7,980,000
Income on bank-owned life insurance	(6,620,000)	(5,846,000)	(5,208,000)
Contribution of common stock to Columbia Bank Foundation	0	0	34,767,000
Employee stock ownership plan expense	3,161,000	3,566,000	2,594,000
Stock based compensation	8,790,000	3,694,000	0
(Increase) decrease in deferred compensation obligations under Rabbi Trust	(60,000)	65,000	(620,000)
Net cash provided by operating activities	47,886,000	21,824,000	56,594,000
Cash flows from investing activities:
Proceeds from sales of debt securities available for sale	20,761,000	65,198,000	11,513,000
Proceeds from sales of equity securities	0	1,065,000	0
Proceeds from paydown/maturities/calls of debt securities available for sale	247,908,000	149,683,000	69,977,000
Proceeds from paydown/maturities/calls of debt securities held to maturity	48,640,000	46,133,000	8,820,000
Purchases of debt securities available for sale	(292,809,000)	(176,171,000)	(413,804,000)
Purchases of debt securities held to maturity	(12,815,000)	(70,126,000)	(31,639,000)
Purchases of equity securities	0	(416,000)	0
Proceeds from sales of loans held-for-sale	111,764,000	101,946,000	3,615,000
Proceeds from sales of loans receivable	35,613,000	11,671,000	32,039,000
Purchases of loans receivable	0	(89,774,000)	(32,251,000)
Net increase in loans receivable	(80,498,000)	(503,772,000)	(536,129,000)
Purchase of bank-owned life insurance	0	0	(30,000,000)
Proceeds from bank-owned life insurance death benefits	627,000	1,015,000	1,241,000
Proceeds from redemptions of Federal Home Loan Bank stock	50,374,000	72,871,000	67,035,000
Purchases of Federal Home Loan Bank stock	(22,544,000)	(79,796,000)	(81,309,000)
Proceeds from sales of office properties and equipment	0	0	8,000
Additions to office properties and equipment	(4,624,000)	(19,344,000)	(13,272,000)
Proceeds from sales of real estate owned	0	91,000	1,007,000
Net cash acquired in acquisitions	155,248,000	(31,288,000)	0
Net cash provided by (used in) investing activities	257,645,000	(521,014,000)	(943,149,000)
Cash flows from financing activities:
Net increase in deposits	799,548,000	449,270,000	150,558,000
Proceeds from long-term borrowings	90,000,000	140,000,000	220,980,000
Payments on long-term borrowings	(343,939,000)	(230,000,000)	(210,000,000)
Net (decrease) increase in short-term borrowings	(374,847,000)	225,081,000	299,800,000
Payments of subordinated debt and trust preferred securities	(16,600,000)	0	(51,547,000)
(Decrease) increase in advance payments by borrowers for taxes and insurance	(3,919,000)	3,121,000	6,467,000
Issuance of common stock	0	14,000	492,428,000
Purchase of treasury stock	(108,166,000)	(55,309,000)	0
Purchase of employee stock ownership plan shares	0	0	(45,428,000)
Restricted stock forfeitures	(24,000)	(736,000)	0
Restricted stock repurchased on vesting to pay taxes	(174,000)	0	0
Issuance of treasury stock allocated to restricted stock award grants	0	1,095,000	0
Net cash provided by financing activities	41,879,000	532,536,000	863,258,000
Net increase (decrease) in cash and cash equivalents	347,410,000	33,346,000	(23,297,000)
Cash and cash equivalents at beginning of period	75,547,000	42,201,000	65,498,000
Cash and cash equivalents at end of period	422,957,000	75,547,000	42,201,000
Cash paid during the period for:
Interest on deposits and borrowings	75,557,000	87,370,000	61,987,000
Income tax payments, net of (refunds)	10,526,000	(2,893,000)	21,325,000
Non-cash investing and financing activities:
Transfer of loans receivable to real estate owned	0	0	251,000
Transfer of loans receivable to loans held-for-sale	114,171,000	93,147,000	11,696,000
Securitization of loans	117,259,000	21,615,000	0
Initial recognition of operating lease right-of-use asset	22,218,000	0	0
Initial recognition of operating lease liabilities	23,290,000	0	0
Non-cash assets acquired:
Debt securities available for sale	51,479,000	51,710,000	0
Debt securities held to maturity	13,418,000	0	0
Equity securities	1,796,000	1,073,000	0
Federal Home Loan Bank stock	2,010,000	3,716,000	0
Loans receivable	171,593,000	757,223,000	0
Accrued interest receivable	679,000	2,239,000	0
Office properties and equipment, net	5,774,000	6,815,000	0
Bank-owned life insurance	17,245,000	22,096,000	0
Deferred tax assets, net	6,475,000	3,534,000	0
Core deposit and other intangibles	0	7,467,000	0
Other assets	1,489,000	767,000	0
Total non-cash assets acquired	271,958,000	856,640,000	0
Liabilities assumed:
Deposits	333,234,000	782,698,000	0
Borrowings	37,728,000	82,761,000	0
Advance payments by borrowers for taxes and insurance	982,000	356,000	0
Accrued expenses and other liabilities	5,400,000	14,584,000	0
Total liabilities assumed	377,344,000	880,399,000	0
Net non-cash liabilities acquired	(105,386,000)	(23,759,000)	0
Net cash and cash equivalents acquired in acquisition	$ 155,248,000	$ 105,006,000	$ 0

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Business

12 Months Ended

Dec. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Business

Business

    On April 19, 2018, the Company completed its minority stock offering, after receiving all regulatory approvals. In connection with the closing, 62,580,155 shares of its common stock were issued to Columbia Bank, MHC (the "MHC"), the mutual holding company of Columbia Financial, Inc., 3,476,675 shares were issued to the Columbia Bank Foundation, the Bank's charitable foundation, and 49,832,345 shares were issued to depositors of the Bank, who subscribed for and were allocated shares in the minority stock offering, as well as the Columbia Bank Employee Stock Ownership Plan (the "ESOP"). The accounts of the MHC are not consolidated in the consolidated financial statements of the Company.

    On November 1, 2019, the Company completed its acquisition of Stewardship Financial Corporation ("Stewardship"), pursuant to the Agreement and Plan of Merger, dated as of June 6, 2019 (the "Merger Agreement"), by and among Columbia Financial, Broadway Acquisition Corp. (a wholly owned subsidiary of Columbia Financial) and Stewardship. Under the terms of the merger agreement, each outstanding share of Stewardship common stock was converted into the right to received $15.75 in cash at the effective time of the merger.The total consideration paid was $136.3 million.

    On April 1, 2020, the Company completed its acquisition of RSB Bancorp, MHC, RSB Bancorp, Inc. and Roselle Bank (collectively, the "Roselle Entities" or "Roselle"). Pursuant to the terms of the Merger Agreement, RSB Bancorp, MHC merged with and into the MHC, with the MHC as the surviving entity; and Roselle Bank merged with and into the Bank, with the Bank as the surviving institution. Under the terms of the merger agreement, depositors of Roselle Bank became depositors of the Bank and have the same rights and privileges in the MHC as if their accounts had been established at the Bank on the date established at Roselle Bank. The Company issued 4,759,048 shares of its common stock to the MHC, representing an amount equal to the fair value of the Roselle Entities as determined by an independent appraiser, at the effective time of the merger.

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Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

Principles of Consolidation

    The accompanying consolidated financial statements include the accounts of Columbia Financial, Inc., its wholly-owned subsidiary, Columbia Bank (the "Bank") and the Bank's wholly-owned subsidiaries, Columbia Investment Services, Inc., 2500 Broadway Corp. 1901 Residential Management Co. LLC, Plaza Financial Services, Inc., First Jersey Title Services, Inc., Real Estate Management Corp. LLC, 1901 Commercial Management Co. LLC, Stewardship Realty LLC, and CSB Realty Corp. (collectively, the “Company”). In consolidation, all intercompany accounts and transactions are eliminated. Certain reclassifications have been made in the consolidated financial statements to conform with current year classifications. During the year ended December 31, 2020, the Company revised the Consolidated Statements of Cash Flows for the years ended December 31, 2019 and 2018. The revision consisted of reclassifying the proceeds from sales of loans held-for-sale from cash flows from operating activities to cash flows from investing activities. The impact of these revisions was a decrease to cash flows from operating activities and an increase to cash flows from investing activities of $101.9 million and $3.6 million for the years ended December 31, 2019 and 2018, respectively. The revisions had no impact on cash and cash equivalents as of December 31, 2019 and 2018.

    The Company also owned 100% of the common stock of Columbia Financial Capital Trust I (the "Trust"). The Trust was used to issue trust preferred securities. In accordance with Accounting Standards Codification ("ASC") Topic 810, Consolidation, the Trust was classified as a variable interest entity and did not satisfy the conditions for consolidation. Accordingly, the Trust was treated as an unconsolidated subsidiary. In August 2018, the Company redeemed, in full $51.5 million of junior subordinated debt securities, which represented 100% of the assets of the Trust.

    The Bank's wholly owned subsidiary, Stewardship Realty, LLC, incorporated as a New Jersey corporation in 2005 was acquired in the Company's merger with Stewardship in November 2019. It is a service corporation originally organized to hold and manage property in Midland Park which was previously occupied by Atlantic Stewardship Bank.

    The Company also owns 100% of the common stock of Stewardship Statutory Trust I, which is a trust incorporated in Delaware which was also acquired in the Company's merger with Stewardship in November 2019. In accordance with ASC Topic 810, Consolidation, this Trust was classified as a variable interest entity and did not satisfy the conditions for consolidation. Accordingly, this Trust, which owns $7.0 million of trust preferred securities, which represents 100% of the assets, is treated as an unconsolidated subsidiary.

(2)    Summary of Significant Accounting Policies (continued)

Basis of Financial Statement Presentation

    The consolidated financial statements of the Company have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”). In preparing the consolidated financial statements, management is required to make estimates and assumptions about future events. These estimates and the underlying assumptions affect the reported amounts of assets and liabilities and disclosures about contingent assets and liabilities as of the dates of the Consolidated Statements of Financial Condition, and Consolidated Statements of Income for the periods presented. Material estimates that are particularly susceptible to change are the determination of the adequacy of the allowance for credit losses, evaluation of goodwill for impairment, evaluation of other-than-temporary impairment on securities, evaluation of the need for valuation allowances on deferred tax assets, and determination of liabilities related to retirement and other post-retirement benefits, among others. These estimates and assumptions are based on management’s best estimates and judgment. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment, which management believes to be reasonable under the circumstances. Such estimates and assumptions are adjusted when facts and circumstances dictate. Illiquid credit markets, volatile securities markets, and declines in the housing market and the economy generally have combined to increase the uncertainty inherent in such estimates and assumptions. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. Changes in estimates resulting from continuing changes in the economic environment will be reflected in the consolidated financial statements in future periods.

Cash and Cash Equivalents

    Cash and cash equivalents include cash on hand, amounts due from banks and interest-bearing deposits at other financial institutions and short-term investments. The Company is required by the Federal Reserve Bank System to maintain cash reserves equal to a percentage of certain deposits. At December 31, 2020 and 2019, the reserve requirement totaled $4.9 million and $8.8 million, respectively.

Securities

    Securities are classified as available for sale and held to maturity. Management determines the appropriate classification of securities at the time of purchase. Securities that management has the positive intent and ability to hold to maturity are classified as held to maturity and reported at amortized cost. Securities not classified as held to maturity are classified as available for sale and carried at estimated fair value, with unrealized holding gains or losses, net of taxes, reported as a separate component of accumulated other comprehensive income or loss ("OCI") included in stockholders' equity.

The fair values of these securities are based on market quotations or matrix pricing as discussed in note 17. The Company evaluates securities for other-than-temporary impairment at each reporting period and more frequently when economic or market conditions warrant such evaluation. In this evaluation, if such declines were deemed other-than temporary, management would measure the total credit-related component of the unrealized loss, and recognize that portion of the loss as a charge to current period earnings. The remaining portion of the unrealized loss would be recognized as an adjustment to OCI. The fair value of the securities portfolio is significantly affected by changes in interest rates. In general, as interest rates rise, the fair value of fixed-rate securities decreases and as interest rates fall, the fair value of fixed-rate securities increases. The Company determines if it has the intent to sell securities or if it more likely than not that the Company would be required to sell the securities before the anticipated recovery. If either exists, the decline in value is considered other-than-temporary and would be recognized in current period earnings.

    Premiums and discounts on securities are generally amortized and accreted to income over the contractual lives of the securities using the level-yield method. Premiums on callable securities are amortized to the earliest call date. Dividend and interest income are recognized when earned. Realized gains and losses are recognized when securities are sold or called based on the specific identification method.

    In the ordinary course of business, securities are pledged as collateral in conjunction with the Company’s borrowings, lines of credit, and public funds on deposit.

Federal Home Loan Bank Stock

    The Bank, as a member of the Federal Home Loan Bank of New York (the "FHLB"), is required to hold shares of capital stock of the FHLB based on its activities, primarily its outstanding borrowings. The Bank carries the investment at cost, or par value, which approximates fair value. Cash dividends are reported as income.

(2)    Summary of Significant Accounting Policies (continued)

Loans Held-for-Sale

    Loans held-for-sale consists of loans intended for sale in the secondary market. These loans are carried at the lower of cost or estimated fair value, less costs to sell, as determined on an individual loan basis. Net unrealized losses, if any, are recognized in a valuation allowance through a charge to earnings. Origination fees and costs on loans held-for-sale are deferred and recognized on settlement dates as a component of the gain or loss on sale. Loans held-for-sale are generally sold with loan servicing rights retained by the Bank.

Loans Receivable

    Loans receivable are carried at unpaid principal balances adjusted by unamortized premiums and unearned discounts, net deferred origination fees and costs less the allowance for loan losses. The Bank defers loan origination fees and certain direct loan origination costs and accretes such amounts as an adjustment to the yield over the expected lives of the related loans using the level-yield method. Interest income on loans is accrued and credited to income as earned. Premiums and discounts on loans purchased are amortized or accreted as an adjustment to yield over the contractual lives of the related loans using methodologies which approximate the level-yield method.

    A loan is considered delinquent when payment has not been received within 30 days of its contractual due date. Generally, a loan in designated as a non-accrual loan when the payment of interest is 90 days or more in arrears of its contractual due date. When a loan is placed on non-accrual status, any interest accrued but not received is reversed against interest income. Payments received on a non-accrual loan are either applied to the outstanding principal balance or recorded as interest income, depending on an assessment of the ability to collect the loan. Non-accruing loans are returned to accrual status after there has been a sustained period of repayment performance (generally six consecutive months of payment) and both principal and interest are deemed collectible. The Company identifies loans which may need to be charged-off as a loss, by reviewing all delinquent loans, classified loans and other loans that management may have concerns about collectability.

    An impaired loan is defined as a loan for which it is probable, based on current information, that the Bank will not collect all amounts due under the contractual terms of the loan agreement. The Bank considers the population of loans in its impairment analysis to include all multifamily and commercial real estate, construction, and commercial business loans with an outstanding balance greater than $500,000 and not accruing interest, and loans modified in a troubled debt restructuring. The Company also considers residential real estate, and home equity loans and advances that are not accruing or modified in a troubled debt restructuring for impairment. Other loans may be included in the population of loans in its impairment analysis if management has specific information of a collateral shortfall. Loan impairment is measured based on the present value of expected future cash flows discounted at the loan's effective interest rate or, as a practical expedient, at the loan's observable market price or the fair value of the collateral if the loan is collateral dependent. Payments received on impaired loans are recognized on a cash basis.

Purchased Credit-Impaired ("PCI") Loans

    Purchased credit impaired loans are loans acquired through acquisitions at a discount primarily due to deteriorated credit quality. PCI loans are recorded at fair value at the date of acquisition, based upon the present value of expected future cash flows, with no carryover of the related allowance for credit losses. Determining the fair value of the loans involves projecting the amount and timing of principal and/or interest cash flows expected to be collected on the loans discounting those cash flows at a market rate of interest. The excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable yield and is recognized into interest income over the remaining life of the loan. The difference between contractually required payments at acquisition and the cash flows expected to be collected at acquisition is referred to as the nonaccretable yield. The nonaccretable yield represents estimated future credit losses expected to be incurred over the life of the loan. Subsequent decreases to the expected cash flows require us to evaluate the need for an allowance for credit losses. Subsequent improvements in expected cash flows result in the reversal of a corresponding amount of the nonacretable yield which we then reclassify as accretable yield that is recognized into interest income over the remaining life of the loan using the interest method. The evaluation of the amount of future cash flows that is expected to be collected is performed in a similar manner used to determine the allowance for loan losses. Any charge-offs of principal on acquired loans would first be applied against the nonaccretable yield portion of the fair value adjustment.

(2)    Summary of Significant Accounting Policies (continued)

Allowance for Loan Losses

    Losses on loans are charged to the allowance for loan losses. Additions to this allowance are made by recoveries of loans previously charged off and by a provision charged to expense. The determination of the balance of the allowance for loan losses is based on an analysis of the loan portfolio, economic conditions, historical loan loss experience and other factors that warrant recognition in providing an adequate allowance. Estimates and judgments required to establish the allowance include: overall economic environment; value of collateral; strength of guarantors; loss exposure in the event of default; the amount and timing of future cash flows on impaired loans; and determination of loss factors applied to the portfolio segments. These estimates are susceptible to significant change. Management regularly reviews loss experience within the portfolio and monitors current economic conditions and other factors related to the collectability of the loan portfolio. While management uses available information, future additions to the allowance may be necessary based on changes in economic conditions in the Bank's market area. In addition, regulatory agencies, as an integral part of their examination process, periodically review the adequacy of the Bank's allowance for loan losses as an integral part of their examination. Such agencies may require the Bank to recognize additions to the allowance or additional write-downs based on their judgments about information available to them at the time of their examination. Although management uses the best information available, the level of the allowance for loan losses remains an estimate that is subject to significant uncertainties.

Troubled Debt Restructuring

    Troubled debt restructured loans are those loans where the Company has granted a concession it would not otherwise consider because of economic or legal reasons pertaining to a debtor’s financial difficulties. A concession could include a reduced interest rate below a market rate, an extension of the term of the loan, or a combination of the two methods, but generally does not result in the forgiveness of principal or accrued interest. Not all concessions granted by the Company constitute a troubled debt restructuring. Once an obligation has been restructured and designated as a troubled debt restructuring, it continues to be designed as a restructured loan until paid in full. The Company records an impairment charge equal to the difference between the present value of expected future cash flows under the restructured terms discounted at the loan’s original effective interest rate, and the loan’s carrying value. Changes in the calculated impairment due to the passage of time are recorded as an adjustment to the allowance for loan losses.

    Restructured loans that were accruing prior to the restructuring, where income was reasonably assured subsequent to the restructuring, maintain their accrual status. Restructured loans for which collectability was not reasonably assured are placed on non-accrual status, interest accruals cease, and uncollected accrued interest is reversed and charged against current income. Non-accruing restructured loans may be returned to accrual status when there is a sustained period of repayment performance (generally six consecutive months of payments), and both principal and interest are deemed collectible.

In March 2020, various regulatory agencies, including the Board of Governors of the Federal Reserve System and the Federal Deposit Insurance Corporations issued an interagency statement on loan modifications and reporting for financial institutions working with customers affected by COVID-19. The interagency statement was effective immediately and impacted accounting for loan modifications. Section 4013 of the CARES Act, “Temporary Relief from Troubled Debt Restructurings,” allows banks to temporarily suspend certain requirements under GAAP related to TDRs for a limited period of time to account for the effects of COVID-19. The Bank elected to account for modifications on certain loans under Section 4013 of the CARES Act or, if the loan modification was not eligible under Section 4013, used the criteria in the COVID-19 guidance to determine when the loan modification was not a TDR in accordance with ASC 310-40. Guidance noted that modification or deferral programs mandated by the federal or a state government related to COVID-19 would not be in the scope of ASC 310-40, such as a state program that requires all institutions within that state to suspend mortgage payments for a specified period. Furthermore, based on current evaluations, generally, we have continued the accrual of interest on these loans during the short-term modification period. The Consolidated Appropriations Act, 2021, which was enacted in late December 2020, extended certain provisions of the CARES Act, including provisions permitting loan deferral extension requests to not be treated as troubled debt restructurings.

Loans Sold and Serviced

    The Company has entered into Guarantor Swaps with Freddie Mac to improve its liquidity. In these types of transactions, the Company sells mortgage loans in exchange for Freddie Mac Mortgage Participation Certificates backed exclusively by the loans sold. The Company retains the servicing of these loans. The Company also periodically sells loans to investors and continues to service such loans for a fee. Gains or losses on the sale of loans are recorded on trade date using the specific-identification method.

(2)    Summary of Significant Accounting Policies (continued)

Office Properties and Equipment

    Land is carried at cost. Office properties, land and building improvements, furniture and equipment, and leasehold improvements are carried at cost, less accumulated depreciation and amortization. Depreciation and amortization of office properties and equipment is computed on a straight-line basis over their estimated useful lives (generally 40 years for buildings, 10 years to 20 years for land and building improvements, 3 years to 10 years for furniture and equipment). Leasehold improvements, carried at cost, net of accumulated depreciation, are amortized over the terms of the related leases or the estimated useful lives of the assets, whichever is shorter. Major improvements are capitalized, while repairs and maintenance costs are charged to expense as incurred. Upon retirement or sale, any gain or loss is recognized as incurred. At December 31, 2020 and 2019, land and buildings include property acquired from Stewardship with a fair value of $1.9 million and $1.8 million which is held-for-sale.

Bank-owned Life Insurance ("BOLI")

    Bank-owned life insurance is accounted for using the cash surrender value method and is recorded at its net realizable value. The change in the net asset value is recorded as a component of non-interest income. A deferred liability has been recorded for the estimated cost of post-retirement life insurance benefits accruing to applicable employees and directors covered by an endorsement split-dollar life insurance arrangement.

Goodwill and Intangible Assets

    Intangible assets of the Bank consist of goodwill, core deposit intangibles and mortgage servicing rights. Goodwill represents the excess of the purchase price over the fair value of net assets acquired in purchase acquisitions. In accordance with GAAP, goodwill with an indefinite useful life is not amortized, but is evaluated for impairment on an annual basis, or more frequently if events or changes in circumstances indicate potential impairment between annual measurement dates. As permitted by GAAP, the Company prepares a qualitative assessment in determining whether goodwill may be impaired. The factors considered in the assessment include macroeconomic conditions, industry and market conditions and overall financial performance of the Company, among others. The Company completed its annual goodwill impairment test as of December 31, 2020 based upon its qualitative assessment of goodwill and concluded that goodwill was not impaired and no further quantitative analysis was warranted.

    Core deposit intangibles represent the balance of the core deposit intangibles ascribed to the value of deposits acquired by the Bank through the acquisition of Stewardship.

    Mortgage servicing rights are recorded when purchased or when originated mortgage loans are sold, with servicing rights retained. Mortgage servicing rights are amortized on an accelerated method based upon the estimated lives of the related loans, and generally adjusted for prepayments. Mortgage servicing rights are carried at the lower of amortized cost or fair value.

Leases

The Company determines if an arrangement is a lease at inception. The Company's leases primarily relate to real estate property for branches and office space. All the Company's leases are classified as operating leases and the related right-of-use asset ("ROU") and lease liability are included in other assets and other liabilities, respectively on the Consolidated Statements of Financial Condition.

ROU assets represent the Company’s right to use an underlying asset for the lease term, and lease liabilities represent the Company’s obligation to make lease payments arising from the lease arrangements. The calculated amounts of the ROU asset and lease liabilities are impacted by the length of the lease term and the discount rate used to calculate the present value of minimum lease payments. As the Company's leases do not provide an implicit rate, the discount rate used in determining the lease liability for each individual lease is the Company's incremental borrowing rate. The present value of the lease liability may include the impact of options to extend or terminate the lease when it is reasonably certain that the Company will exercise such options provided in the lease terms. Lease expense is recognized on a straight-line basis over the expected lease term. Lease agreements that include lease and non-lease components, such as common area maintenance charges, are accounted for separately.

(2)    Summary of Significant Accounting Policies (continued)

Post-retirement Benefits

    The Company provides certain health care and life insurance benefits to eligible retired employees under a Post-retirement Plan, along with a split-dollar BOLI death benefit. The Company accrues the cost of retiree health care and other benefits during the employees’ period of active service. Effective January 1, 2019, the Post-retirement plan has been closed to new hires.

    Effective January 1, 2019, the Company implemented ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Post-retirement Benefit Cost. Under this ASU, the FASB requires employers to report the service cost component in the same line item as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net periodic benefit cost are required to be presented in the Consolidated Statements of Income separately from the service cost component. This ASU is also required to be applied retrospectively to all periods presented.

Employee Benefit Plans

    The Company maintains a single-employer tax-qualified defined benefit pension plan (the "Pension Plan") which covers full-time employees that satisfy the Pension Plan eligibility requirements. Effective October 1, 2018, employees hired by the Bank are not eligible to participate in the Company's Pension Plan as the plan has been closed to new employees as of that date.

    The Company's policy is to fund at least the minimum contribution required by the Employee Retirement Income Security Act of 1974. GAAP requires an employer to: (a) recognize in its statement of financial position the over-funded or under-funded status of a defined benefit post-retirement plan measured as the difference between the fair value of plan assets and the benefit obligation; (b) measure a plan’s assets and its obligations that determine its funded status at the end of the employer’s fiscal year (with limited exceptions); and (c) recognize as a component of other comprehensive income (loss), net of tax, the actuarial gains and losses and the prior service costs and credits that arise during the period. The assets of the plan are primarily invested in fixed income and equity funds.

    The Company has a retirement income maintenance plan (the "RIM Plan") which is a non-qualified defined benefit plan which provides benefits to all employees of the Company if their benefits under the Pension Plan are limited by the Internal Revenue Code.

    The Company has a 401(k) plan covering substantially all employees of the Company. The Company may match a percentage of the first 3.00% to 4.50% contributed by participants. The Company's matching contribution, if any, is determined by the Board of Directors in its sole discretion.

    The Company has an Employee Stock Ownership Plan ("ESOP"). The funds borrowed by the ESOP from the Company to purchase the Company's common stock are being repaid from the Bank's contributions over a period of 20 years. The Company's common stock not allocated to participants is recorded as a reduction of stockholders' equity at cost. Compensation expense for the ESOP is based on the average price of the Company's stock and the amount of shares committed to be allocated during each period.

    The Company has a Supplemental Executive Retirement Plan ("SERP"). The SERP is a non-qualified plan which provides supplemental retirement benefits to eligible officers (those designated by the Board of Directors) of the Company who are prevented from receiving the full benefits contemplated by the ESOP's benefit formulas under tax law limits for tax-qualified plans. In addition, the Company maintains a stock based deferral plan (the "Stock Based Deferral Plan") for certain executives and directors. The Company records a deferred compensation equity account and corresponding contra-equity account for the cost of the shares held by the Stock Based Deferral and SERP Plans.

    The Company also maintains a non-qualified savings income maintenance deferred compensation plan (the "SIM Plan") that provides supplemental benefits to certain executives who are prevented from receiving the full benefits contemplated by the 401(k) Plan under tax law limits for tax-qualified plans, and a Deferred Compensation Plan for directors.

(2)    Summary of Significant Accounting Policies (continued)

Derivatives

    The Company uses derivative financial instruments as components of its market risk management, principally to manage interest rate risk. Certain derivatives are entered into in connection with transactions with commercial customers. Derivatives are not used for speculative purposes. All derivatives are recognized as either assets or liabilities in the Consolidated Statements of Financial Condition, reported at fair value and presented on a gross basis. Until a derivative is settled, a favorable change in fair value results in an unrealized gain that is recognized as an asset, while an unfavorable change in fair value results in an unrealized loss that is recognized as a liability.

    The Company generally applies hedge accounting to its derivatives used for market risk management purposes. Hedge accounting is permitted only if specific criteria are met, including a requirement that a highly effective relationship exists between the derivative instrument and the hedged item, both at inception of the hedge and on an ongoing basis. Changes in the fair value of effective fair value hedges are recognized in current earnings (with the change in fair value of the hedged asset or liability also recognized in earnings). Changes in the fair value of effective cash flow hedges are recognized in other comprehensive income (loss) until earnings are affected by the variability in cash flows of the designated hedged item. Ineffective portions of hedge results are recognized in current earnings. Changes in the fair value of derivatives for which hedge accounting is not applied are recognized in current earnings.

The Company formally documents at inception all relationships between the derivative instruments and the hedged items, as well as its risk management objectives and strategies for undertaking the hedge transactions. This process includes linking all derivatives that are designated as hedges to specific assets and liabilities, or to specific firm commitments. The Company also formally assesses, both at inception of the hedge and on an ongoing basis, whether the derivatives that are used in hedging transactions are highly effective in offsetting changes in the fair values or cash flows of the hedged items. If it is determined that a derivative is not highly effective or has ceased to be a highly effective hedge, the Company would discontinue hedge accounting prospectively. Gains or losses resulting from the termination of a derivative accounted for as a cash flow hedge remain in other comprehensive income (loss) and is (accreted) amortized to earnings over the remaining period of the former hedging relationship.

Certain derivative financial instruments are offered to certain commercial banking customers to manage their risk of exposure and risk management strategies. These derivative instruments consist primarily of currency forward contracts and interest rate swap contracts. The risks associated with these transactions is mitigated by simultaneously entering into similar transactions having essentially offsetting terms with a third party. In addition, the Company executes interest rate swaps with third parties in order to hedge the interest rate risk of short-term FHLB advances.

Income Taxes

    The Company and its subsidiaries file consolidated federal income tax returns. Federal income taxes are allocated to each entity based on their respective contributions to taxable income of the consolidated income tax returns. Beginning in 2019 as required by the State of New Jersey, the Company adopted combined income tax reporting for certain members of a commonly-controlled unitary business group. Prior to 2019, separate state income tax returns were filed for the Company and each of its qualifying subsidiaries.

    The Company records income taxes in accordance with ASC Topic 740, Income Taxes, using the asset and liability method. The amounts reflected on the Company's federal and state income tax returns differ from these provisions due principally to temporary differences in the reporting of certain items for consolidated financial statement reporting and income tax reporting purposes. Accordingly, deferred tax assets and liabilities: (i) are recognized for the expected future tax consequences of events that have been recognized in the financial statements or tax returns; (ii) are attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases; and (iii) are measured using enacted tax rates expected to apply in the years when those temporary differences are expected to be recovered or settled. Where applicable, deferred tax assets are reduced by a valuation allowance for any portions determined not likely to be realized. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income tax expense in the period that includes the enactment date. The valuation allowance is adjusted, by a charge or credit to income tax expense, as changes in facts and circumstances warrant.

    The Company did not have any liabilities for uncertain tax positions or any known unrecognized tax benefits at December 31, 2020 and 2019. The Company recognizes interest and penalties related to unrecognized tax benefits in income tax expense in the Consolidated Statements of Income. The Company did not recognize any interest and penalties during the years ended December 31, 2020, 2019 and 2018.

(2)    Summary of Significant Accounting Policies (continued)

Income Taxes (continued)

On July 1, 2018, New Jersey enacted legislation which adds to the state’s 9.0% Corporation Business Tax rate (i) a 2.5% surtax for periods beginning in 2018 and 2019 and (ii) a 1.5% surtax for periods beginning in 2020 and 2021. Subsequently, on September 12, 2020, New Jersey enacted legislation that restored and extended the 2.5% Corporation Business Tax surcharge to apply retroactively from January 1, 2020 through December 31, 2023. These surtaxes apply to corporations with more than $1.0 million of net income allocated to New Jersey. In addition, for periods beginning in 2019, as previously noted, New Jersey adopted combined income tax reporting for certain members of a commonly-controlled unitary business group, and issued guidance in December 2019 to clarify business entities to be included and excluded from this combined group.

Comprehensive Income (Loss)

    Comprehensive income (loss) consists of net income and other comprehensive income (loss). Other comprehensive income (loss) includes items recorded in equity, such as unrealized gains and losses on debt securities available for sale, the noncredit component of other than temporary impairment losses on debt securities, unrealized gains and losses on derivatives, and the unfunded status and reclassification of actuarial net (loss) gain associated with the Company's benefit plans. Comprehensive income is presented in a separate Consolidated Statement of Comprehensive Income (Loss).

Segment Reporting

    The Company’s operations are substantially in the financial services industry and include providing traditional banking and other financial services to its customers. The Company operates primarily in New Jersey. Management makes operating decisions and assesses performance based on an ongoing review of the Company’s consolidated financial results. Therefore, the Company has a single operating segment for financial reporting purposes.

Earnings Per Share ("EPS")

    Basic EPS is computed by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the period. For purposes of calculating basic EPS, weighted average common shares outstanding excludes treasury stock, unallocated employee stock ownership plan shares that have not been committed for release and deferred compensation obligations required to be settled in shares of Company stock.

Diluted EPS is computed using the same method as basic EPS and reflects the potential dilution which could occur if stock options and unvested shares were exercised and converted into common stock. The potentially diluted shares would then be included in the weighted average number of shares outstanding for the period using the treasury stock method. Shares issued and reacquired during any period are weighted for the portion of the period that they were outstanding.

Stock Compensation Plans

    Compensation expense related to stock options and non-vested restricted stock awards is based on the fair value of the award on the measurement date with expense recognized on a straight line basis over the requisite performance or service period. The fair value of stock options is estimated utilizing the Black-Scholes option pricing model. The fair value of non-vested restricted stock awards is generally the closing market price of the Company's common stock on the date of grant. The Company accounts for forfeitures as they occur.

Recent Accounting Pronouncements

    As an “emerging growth company” as defined in Title 1 of the Jumpstart Our Business Startups (JOBS) Act prior to December 31, 2019, the Company elected to use the extended transition period to delay the adoption of new or reissued accounting pronouncements applicable to public companies until such pronouncements were made applicable to private companies.

    Accounting Pronouncements Adopted

In October 2018, the FASB issued ASU No. 2018-16, Derivatives and Hedging (Topic 815)- Inclusion of the Secured Overnight Financing Rate ("SOFR") Overnight Index Swap ("OIS") Rate as a Benchmark Interest Rate for Hedge Accounting Purposes. This ASU permits the use of the OIS rate based upon SOFR as a U.S. benchmark interest rate for hedge accounting

(2)    Summary of Significant Accounting Policies (continued)

Recent Accounting Pronouncements (cont'd)

Accounting Pronouncements Adopted (continued)

purposes under Topic 815 in addition to the direct Treasury obligations of the U.S. Government, the LIBOR swap rate, the OIS rate based on the Fed Funds Effective Rate, and the Securities Industry and Financial Markets Association Municipal Swap Rate.

The amendments in this ASU are required to be adopted concurrently with the amendments in ASU No. 2017-12, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities, which was issued in August 2017. The effective date for this ASU for the Company is for fiscal years beginning after December 15, 2019, with early adoption, including adoption in an interim period permitted. The amendments should be adopted on a prospective basis for qualifying new or redesignated hedging relationships entered into on or after date of adoption. The Company adopted this guidance effective January 1, 2020. The adoption of this ASU did not have a material impact on the Company's consolidated financial statements.

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement. The purpose of this updated guidance is to improve the effectiveness and disclosures in the notes to the consolidated financial statements. The ASU removes the requirement to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy; removes the policy for timing of transfers between levels; and removes the disclosure related to the valuation process for Level 3 fair value measurements. The ASU also modifies existing disclosure requirements which relate to the disclosure for investments in certain entities which calculate net asset value and clarifies the disclosure about uncertainty in the measurements as of the reporting date. For all entities, the effective date for this guidance is fiscal years beginning after December 15, 2019, including interim periods within the reporting period, with early adoption permitted. Entities are also allowed to elect early adoption of the eliminated or modified disclosure requirements and delay adoption of the new disclosure requirements until their effective date. The Company adopted this guidance effective January 1, 2020. The adoption of this ASU did not have a material impact on the Company's consolidated financial statements.

In March 2017, the FASB issued ASU No. 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities. This guidance shortens the amortization period for premiums on callable debt securities by requiring that premiums be amortized to the first (or earliest) call date instead of as an adjustment to the yield over the contractual life. This change more closely aligns the accounting with the economics of a callable debt security and the amortization period with expectations that already are included in market pricing on callable debt securities. This guidance does not change the accounting for discounts on callable debt securities, which will continue to be amortized to the maturity date. This guidance includes only instruments that are held at a premium and have explicit call features. It does not include instruments that contain prepayment features, such as mortgage backed securities; nor does it include call options that are contingent upon future events or in which the timing or amount to be paid is not fixed. The effective date for this ASU for the Company is fiscal years beginning after December 15, 2019, including interim periods within the reporting period, with early adoption permitted. Transition is

on a modified retrospective basis with an adjustment to retained earnings as of the beginning of the period of adoption. The Company

adopted this guidance effective January 1, 2020. The adoption of this ASU did not have a material impact on the Company's consolidated financial statements.

    In January 2017, the FASB issued ASU No. 2017-04, Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. The main objective of this guidance is to simplify the accounting for goodwill impairment by requiring that impairment charges be based upon the first step in the current two-step impairment test under ASC 350. Currently, if the fair value of a reporting unit is lower than its carrying amount (Step 1), an entity calculates any impairment charge by comparing the implied fair value of goodwill with its carrying amount (Step 2). The implied fair value of goodwill is calculated by deducting the fair value of all assets and liabilities of the reporting unit from the reporting unit’s fair value as determined in Step 1. To determine the implied fair value of goodwill, entities estimate the fair value of any unrecognized intangible assets and any corporate-level assets or liabilities that were included in the determination of the carrying amount and fair value of the reporting unit in Step 1. Under this guidance, if a reporting unit’s carrying amount exceeds its fair value, an entity will record an impairment charge based on that difference. The impairment charge will be limited to the amount of goodwill allocated to that reporting unit. This guidance eliminates the requirement to calculate a goodwill impairment charge using Step 2. This guidance does not change the guidance on completing Step 1 of the goodwill impairment test. Under this guidance, an entity will still be able to perform the current optional qualitative goodwill impairment assessment before determining whether to proceed to Step 1. The guidance in the ASU was applied prospectively and is effective for the Company for annual and interim impairment tests performed in periods beginning after December 15, 2019. The Company adopted this guidance effective January 1, 2020. The adoption of this ASU did not have a material impact on the Company's consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). This guidance requires all lessees to recognize a lease liability and a right-of-use asset, measured at the present value of the future minimum lease payments, at the lease

(2)    Summary of Significant Accounting Policies (continued)

Recent Accounting Pronouncements (cont'd)

Accounting Pronouncements Adopted (continued)

commencement date for leases classified as operating leases as well as finance leases. The update also requires new quantitative disclosures related to leases in the Company's consolidated financial statements. There are also practical expedients in this update related to leases that commenced before the effective date, initial direct costs and the use of hindsight to extend or terminate a lease or purchase a leased asset. Lessor accounting remains largely unchanged under this new guidance. In January 2018, the FASB issued ASU 2018-01, Leases (Topic 842)-Land Easement Practical Expedient for Transition to Topic 842, which provides an optional practical expedient to not evaluate land easements which were existing or expired before the adoption of Topic 842 that were not accounted for as leases under Topic 840. In July 2018, the FASB issued ASU 2018-10, Codification Improvements to Topic 842, Leases and ASU 2018-11, Leases (Topic 842) -Targeted Improvements which provides entities with an optional transition method under which comparative periods presented in the financial statements will continue to be in accordance with current Topic 840, Leases, and a practical expedient to not separate non-lease components from the associated lease component. The guidance is effective for the Company for annual periods beginning after December 15, 2019, including interim periods within that reporting period. In the evaluation of this guidance, the Company identified the inventory of leases and actively accumulated the requisite lease data necessary to apply the guidance. The Company selected a software platform to support the recording, accounting and disclosure requirements of the new lease guidance. Upon adoption, the Company recorded a right-of-use asset and lease liability as of January 1, 2020. See note 9 for more information regarding adoption.

In March 2017, the FASB issued ASU No. 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Post-retirement Benefit Cost, which requires that companies disaggregate the service cost component from other components of net benefit cost. This update calls for companies that offer post-retirement benefits to present the service cost, which is the amount an employer has to set aside each quarter or fiscal year to cover the benefits, in the same line item with other current employee compensation costs. Other components of net benefit cost will be presented in the income statement separately from the service costs component and outside the subtotal of income from operations, if one is presented. The effective date for this ASU for the Company is fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company adopted this guidance effective January 1, 2019. See note 14 for additional disclosure regarding the impact of adoption of this ASU on the Company's consolidated financial statements.

In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, a new standard which addresses diversity in practice related to eight specific cash flow issues: debt prepayment or extinguishment costs, settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies (including bank-owned life insurance policies), distributions received from equity method investees, beneficial interests in securitization transactions and separately identifiable cash flows and application of the predominance principle. This guidance in the ASU is effective for the Company for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Entities will apply the standard’s provisions using a retrospective transition method to each period presented. If it is impracticable to apply the amendments retrospectively for some of the issues, the amendments for those issues would be applied prospectively as of the earliest date practicable. The Company adopted this guidance effective January 1, 2019. The adoption of this ASU did not have a material impact on the Company's consolidated financial statements.

    In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments- Overall: Recognition and Measurement of Financial Assets and Financial Liabilities. This guidance requires an entity to: (i) measure equity investments at fair value through net income, with certain exceptions; (ii) present in other comprehensive income the changes in instrument-specific credit risk for financial

liabilities measured using the fair value option; (iii) present financial assets and financial liabilities by measurement category and form of financial asset; (iv) calculate the fair value of financial instruments for disclosure purposes based on an exit price; and (v) assess a valuation allowance on deferred tax assets related to unrealized losses on available-for-sale debt securities in combination with other deferred tax assets. This guidance provides an election to subsequently measure certain non-marketable equity investments at cost less any impairment and adjusted for certain observable price changes. The guidance also requires a qualitative impairment assessment of such equity investments and amends certain fair value disclosure requirements.

    The Company adopted this guidance effective January 1, 2019. As a result, $1.9 million of equity securities, as of December 31, 2018, were reclassified from securities available for sale, and presented as a separate line item on the Consolidated Statements of Financial Condition. The $548,000 after tax unrealized gain on these securities, at time of adoption, was reclassified from other comprehensive income (loss) to retained earnings, and is reflected in the consolidated statements of changes in stockholders' equity. For financial instruments that are measured at amortized cost, the Company measures fair value utilizing an exit price methodology.

(2)    Summary of Significant Accounting Policies (continued)

Recent Accounting Pronouncements (cont'd)

Accounting Pronouncements Adopted (continued)

See note 17 for additional disclosure regarding the impact of adoption of this ASU on the Company's consolidated financial statements.

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers. The objective of this amendment is to clarify the principles for recognizing revenue and to develop a common revenue standard for U.S. GAAP. This update affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of non-

financial assets unless those contracts are in the scope of other standards. The guidance in the ASU was effective for the Company for fiscal years beginning after December 15, 2018. Subsequently, the FASB issued various amendments that were intended to improve and clarify the implementation guidance of ASU No. 2014-09 and had the same effective date as the original guidance. The Company's revenue is primarily comprised of net interest income on interest earning assets and liabilities and non-interest income. The scope of guidance explicitly excludes net interest income as well as other revenues associated with financial assets and liabilities, including loans, leases, securities and derivatives. The Company adopted this guidance effective January 1, 2019, after completing an evaluation of the Company's revenue streams and applicable revenue recognition, and concluded that there are no material changes related to the timing or amount of revenue recognition. The adoption of this guidance did not have a significant impact on the Company's consolidated financial statements, but resulted in additional footnote disclosures, including the disaggregation of certain categories of revenues. See note 23 for additional disclosure regarding the impact of adoption of this ASU on the Company's consolidated financial statements.

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Acquisitions

12 Months Ended

Dec. 31, 2020

Business Combinations [Abstract]

Acquisitions

Acquisitions

Stewardship Financial Corporation

    On November 1, 2019, the Company completed its acquisition of Stewardship Financial Corporation ("Stewardship"), pursuant to the Agreement and Plan of Merger, dated as of June 6, 2019, (the "Merger Agreement"). Under the terms of the merger agreement, each outstanding share of Stewardship common stock was converted into the right to receive $15.75 in cash at the effective time of the merger. At the time of closing, Stewardship had $956.0 million in total assets, including $756.9 million in net loans receivable, $52.6 million in securities, and $877.8 million in total liabilities, including $781.4 million in deposits and $81.8 million in borrowings. The deposits initially acquired from Stewardship were held across a network of 12 branches located in New Jersey throughout Bergen, Morris, and Passaic counties. During the year ended December 31, 2020, four of these branches were closed, and the Bank recorded a loss of $770,000 related to these branch closures.

    Merger-related expenses are recorded in the Consolidated Statements of Income and are expensed as incurred. Direct acquisition and other charges incurred in connection with the Stewardship acquisition totaled $1.3 million and $2.8 million for the years ended December 31, 2020 and 2019, respectively.

    The following table sets forth assets acquired and liabilities assumed in the Stewardship acquisition, at their estimated fair values as of the closing date of the transaction:

	November 1, 2019
Assets acquired:
Cash and cash equivalents	$	105,006
Debt securities available for sale	51,710
Equity securities	1,073
Federal Home Loan Bank stock	3,716
Loans receivable	757,223
Accrued interest receivable	2,239
Office properties and equipment, net	6,815
Bank-owned life insurance	22,096
Deferred tax assets, net	3,534
Core deposit and other intangibles	7,467
Other assets	767
Total assets acquired	$	961,646
Liabilities assumed:
Deposits	$	782,698
Borrowings	82,761
Advance payments by borrowers for taxes and insurance	356
Accrued expenses and other liabilities	14,584
Total liabilities assumed	$	880,399
Net assets acquired	$	81,247
Cash paid for purchase	136,294
Goodwill recorded at merger	$	55,047

The assets acquired and liabilities assumed have been accounted for under the acquisition method of accounting. The assets and liabilities were recorded at their fair values as of November 1, 2019, and resulted in the recognition of goodwill of $55.0 million and a core deposit intangible of $7.5 million. The determination of the fair value of assets acquired and liabilities assumed required management to make estimates about discount rates, future expected cash flows, market conditions, and other future events that are highly subjective in nature and subject to change. The fair value estimates were subject to change for up to one year after the closing date of the transaction if additional information (existing at the date of closing) relative to closing date fair values became available. During the year ended December 31, 2020, the Company determined that there were no material adjustments required to be recorded to amounts as of November 1, 2019.

(3)     Acquisitions (continued)

Roselle Bank

On April 1, 2020, the Company completed its acquisition of RSB Bancorp, MHC, RSB Bancorp, Inc. and Roselle Bank (collectively, the "Roselle Entities" or "Roselle"). Pursuant to the terms of the Merger Agreement, RSB Bancorp, MHC merged with and into the MHC, with the MHC as the surviving entity; RSB Bancorp, Inc. merged with and into Columbia Financial, with Columbia Financial as the surviving entity; and Roselle Bank merged with and into the Bank, with the Bank as the surviving institution. Under the terms of the merger agreement, depositors of Roselle Bank became depositors of the Bank and have the same rights and privileges in the MHC as if their accounts had been established at the Bank on the date established at Roselle Bank. The Company issued 4,759,048 shares of its common stock to the MHC, representing an amount equal to the fair value of the Roselle Entities as determined by an independent appraiser, at the effective time of the merger.

Merger-related expenses are recorded in the Consolidated Statements of Income and are expensed as incurred. Direct acquisition and other charges incurred in connection with the Roselle acquisition totaled $597,000 for the year ended December 31, 2020. There were no expenses related to this merger recorded for the year ended December 31, 2019.

    The following table sets forth assets acquired and liabilities assumed in the Stewardship acquisition, at their estimated fair values as of the closing date of the transaction:

	April 1, 2020
Assets acquired:
Cash and cash equivalents	$	155,248
Debt securities available for sale	51,479
Debt securities held to maturity	13,418
Equity securities	1,796
Federal Home Loan Bank stock	2,010
Loans receivable	171,593
Accrued interest receivable	679
Office properties and equipment, net	5,774
Bank-owned life insurance	17,245
Deferred tax assets, net	1,334
Other assets	1,489
Total assets acquired	$	422,065
Liabilities assumed:
Deposits	$	333,234
Borrowings	37,728
Advance payments by borrowers for taxes and insurance	982
Accrued expenses and other liabilities	5,400
Total liabilities assumed	$	377,344
Net assets acquired	$	44,721
Fair market value of stock issued to Columbia Bank MHC for purchase	68,530
Goodwill recorded at merger	$	23,809

(3)     Acquisitions (continued)    

Roselle Bank (continued)

The assets acquired and liabilities assumed have been accounted for under the acquisition method of accounting. The assets and liabilities were recorded at their fair values as of April 1, 2020, and resulted in the recognition of goodwill of $23.8 million. The determination of the fair value of assets acquired and liabilities assumed required management to make estimates about discount rates, future expected cash flows, market conditions, and other future events that are highly subjective in nature and subject to change. The fair value estimates are subject to change for up to one year after the closing date of the transaction if additional information (existing at the date of closing) relative to closing date fair values becomes available. During the fourth quarter of 2020, the Company completed all tax returns related to the operation of the acquired entity and its impact on the Company's income taxes, which resulted in a $5.1 million adjustment to deferred income taxes, net, and a decrease in goodwill. At December 31, 2020, goodwill related to the Roselle acquisition totaled $18.7 million. As the Company continues to analyze the acquired assets and assumed liabilities, there may be adjustments to the recorded carrying values through April 1, 2021.

Fair Value Measurement of Assets Acquired and Liabilities Assumed

    Described below are the methods used to determine the fair values of the significant assets acquired and liabilities assumed in the Stewardship and Roselle acquisitions:

    Cash and cash equivalents. The estimated fair values of cash and cash equivalents approximate their stated face amounts, as these financial instruments are either due on demand or have short-term maturities.

Debt securities available for sale. The estimated fair values of the debt securities were calculated utilizing Level 2 inputs. The majority of the acquired securities were fixed income instruments that are not quoted on an exchange, but are traded in active markets. The prices for these instruments are obtained through an independent pricing service when available, or dealer market participants with whom the Company has historically transacted with for both purchases and sales of securities. The prices are derived from market quotations and matrix pricing. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, and the bond's terms and conditions, among other things. Management reviewed the data and assumptions used in pricing securities by its third party provider to ensure the highest level of significant inputs are derived from market observable data.

    Loans receivable. The acquired loan portfolio was segregated into pools for valuation purposes primarily based on loan type, non-accrual status, and credit risk rating. The estimated fair values were computed by discounting the expected cash flows from the respective pools. Cash flows were estimated by using valuation models that incorporated estimates of current key assumptions such as prepayment speeds, default rates, and loss severity rates. The process included: (1) projecting monthly principal and/or interest cash flows based on the contractual terms of the loans, including both maturity and contractual amortization; (2) adjusting projected cash flows for expected losses and prepayments, where appropriate; (3) developing a discount rate based on the relative risk of the cash flows, considering the loan type, liquidity risk, the maturity of the loans, servicing costs, and a required return on capital; and (4) discounting the projected cash flows to a present value, to arrive at the calculated value of the loans.

    The methods used to estimate the fair values of loans are extremely sensitive to the assumptions and estimates used. While management attempted to use assumptions and estimates that best reflected the acquired loan portfolios and current market conditions, a greater degree of subjectivity is inherent in the values than in those determined in active markets.

    Office properties and equipment, net. The fair value of land and buildings was estimated using current appraisals. Acquired equipment was not material. Buildings are amortized over their estimated useful lives. Leasehold improvements and equipment are amortized or depreciated over their estimated useful lives usually ranging for 3 years to 10 years.

    Goodwill and intangible assets. Goodwill is not amortized for book purposes: however: it is reviewed at least annually for impairment and is not deductible for tax purposes. Intangible assets recognized in the Stewardship acquisition consisting of core deposit intangibles ("CDI") are the measures of the value of non-maturity deposits in a business combination. The fair value of the CDI was calculated utilizing the cost savings approach, the expected cost savings attributable to the core deposits funding relative to an alternative source of funding, using a discounted cash flow present value methodology. Key inputs and assumptions utilized in the discounted cash flow present value methodology include core deposit balances and rates paid, the cost of an additional funding source, the aggregate life of deposits and truncation points, non-interest deposit costs, and the immediate deposit outflow assumption. The CDI is amortized over an estimated useful life of 10 years to approximate the existing deposit relationships acquired.

(3)     Acquisitions (continued)    

Fair Value Measurement of Assets Acquired and Liabilities Assumed (continued)

    Deposits. The fair values of deposit liabilities with no stated maturity (i.e., non-interest bearing and interest-bearing demand deposit accounts, money market and savings and club accounts) are equal to the carrying amounts payable on demand. The fair value of certificates of deposit represent contractual cash flows, discounted to present value using interest rates currently offered on deposits with similar characteristics and remaining maturities.

    Borrowings. The fair values of borrowings consisting of FHLB advances were estimated by discounting future cash flows using market discount rates for borrowings with similar characteristics, terms and remaining maturities. The fair value of other borrowings recognized in the Stewardship acquisition, which included subordinated notes and debentures, were measured at the acquisition date using a dealer market quote.

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Debt Securities Available for Sale

12 Months Ended

Dec. 31, 2020

Investments, Debt and Equity Securities [Abstract]

Debt Securities Available for Sale

Debt Securities Available for Sale

    Debt securities available for sale at December 31, 2020 and 2019 are summarized as follows:

	December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
			(In thousands)
U.S. government and agency obligations	$	24,425	$	1,124	$	—	$	25,549
Mortgage-backed securities and collateralized mortgage obligations	1,163,613		37,343		(562)		1,200,394
Municipal obligations	16,845		17		—		16,862
Corporate debt securities	67,628		2,264		(415)		69,477
Trust preferred securities	5,000		—		(330)		4,670
	$	1,277,511	$	40,748	$	(1,307)	$	1,316,952

	December 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
			(In thousands)
U.S. government and agency obligations	$	42,081	$	321	$	(16)	$	42,386
Mortgage-backed securities and collateralized mortgage obligations	968,165		12,981		(1,265)		979,881
Municipal obligations	2,284		1		(1)		2,284
Corporate debt securities	68,613		945		(378)		69,180
Trust preferred securities	5,000		—		(395)		4,605
	$	1,086,143	$	14,248	$	(2,055)	$	1,098,336

    The amortized cost and fair value of debt securities available for sale at December 31, 2020, by contractual final maturity, is shown below. Expected maturities may differ from contractual maturities due to prepayment or early call options exercised by the issuer.

(4)     Debt Securities Available for Sale (continued)

	December 31, 2020
	Amortized Cost		Fair Value
	(In thousands)
One year or less	$	21,378	$	21,380
More than one year to five years	47,429		49,276
More than five years to ten years	45,091		45,902
	$	113,898	$	116,558
Mortgage-backed securities and collateralized mortgage obligations	1,163,613		1,200,394
	$	1,277,511	$	1,316,952

    Mortgage-backed securities and collateralized mortgage obligations totaling $1.2 billion at amortized cost, and $1.2 billion at fair value, are not classified by maturity in the table above as their expected lives are likely to be shorter than the contractual maturity date due to principal prepayments.

During the year ended December 31, 2020, proceeds from the sale of debt securities available for sale totaled $20.8 million, resulting in $369,000 of gross gains and no gross losses. During the year ended December 31, 2020, proceeds from called debt securities available for sale totaled $11.6 million resulting in $1,000 of gross gains and no gross losses. During the year ended December 31, 2020, proceeds from matured debt securities available for sale totaled $10.9 million.

    During the year ended December 31, 2019, proceeds from the sale of debt securities available for sale totaled $65.2 million, resulting in $2.2 million of gross gains and $22,000 of gross losses. During the year ended December 31, 2019, proceeds from called debt securities available for sale totaled $24.1 million resulting in $174,000 of gross gains and no gross losses. During the year ended December 31, 2019, proceeds from one matured debt security available for sale totaled $797,000.

    During the year ended December 31, 2018, proceeds from the sale of debt securities available for sale totaled $11.5 million, resulting in $116,000 of gross gains and no gross losses. During the year ended December 31, 2018, proceeds from matured debt securities available for sale totaled $2.4 million.

    Debt securities available for sale having a carrying value of $822.2 million and $462.0 million, at December 31, 2020 and 2019, respectively, were pledged as security for public funds on deposit at the Bank as required and permitted by law, pledged for outstanding borrowings at the Federal Home Loan Bank, and pledged for potential borrowings at the Federal Reserve Bank of New York.

    The following tables summarize the fair value and gross unrealized losses of those securities that reported an unrealized loss at December 31, 2020 and 2019 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	December 31, 2020
	Less Than 12 Months				12 Months or Longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
Mortgage-backed securities and collateralized mortgage obligations	$	117,978	$	(481)	$	24,018	$	(81)	$	141,996	$	(562)
Corporate debt securities	9,845		(155)		5,740		(260)		15,585		(415)
Trust preferred securities	—		—		4,670		(330)		4,670		(330)
	$	127,823	$	(636)	$	34,428	$	(671)	$	162,251	$	(1,307)

(4)     Debt Securities Available for Sale (continued)

	December 31, 2019
	Less Than 12 Months				12 Months or Longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
U.S. government and agency obligations	$	5,106	$	(13)	$	4,988	$	(3)	$	10,094	$	(16)
Mortgage-backed securities and collateralized mortgage obligations	178,665		(946)		58,208		(319)		236,873		(1,265)
Municipal obligations	696		(1)		—		—		696		(1)
Corporate debt securities	2,588		(5)		4,627		(373)		7,215		(378)
Trust preferred securities	—		—		4,605		(395)		4,605		(395)
	$	187,055	$	(965)	$	72,428	$	(1,090)	$	259,483	$	(2,055)

    The Company evaluates securities for other-than-temporary impairment at each reporting period and more frequently when economic or market conditions warrant such evaluation. The temporary loss position associated with debt securities available for sale was the result of changes in market interest rates relative to the coupon of the individual security and changes in credit spreads. The Company does not have the intent to sell securities in a temporary loss position at December 31, 2020, nor is it more likely than not that the Company will be required to sell the securities before the anticipated recovery.

    The number of securities in an unrealized loss position at December 31, 2020 totaled 40, compared with 97 at December 31, 2019. All temporarily impaired securities were investment grade as of December 31, 2020 and 2019.

    The Company did not record an other-than-temporary impairment charge on debt securities available for sale during the years ended December 31, 2020, 2019, and 2018.

Debt Securities Held to Maturity

    Debt securities held to maturity at December 31, 2020 and 2019 are summarized as follows:

	December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
	(In thousands)
U.S. government and agency obligations	$	5,000	$	1	$	—	$	5,001
Mortgage-backed securities and collateralized mortgage obligations	257,720		14,372		(2)		272,090
	$	262,720	$	14,373	$	(2)	$	277,091

	December 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
	(In thousands)
U.S. government and agency obligations	$	20,000	$	26	$	(66)	$	19,960
Mortgage-backed securities and collateralized mortgage obligations	265,756		4,048		(259)		269,545
	$	285,756	$	4,074	$	(325)	$	289,505

(5)     Debt Securities Held to Maturity (continued)    

The amortized cost and fair value of debt securities held to maturity at December 31, 2020, by contractual final maturity, is shown below. Expected maturities may differ from contractual maturities due to prepayment or early call options exercised by the issuer.

	December 31, 2020
	Amortized Cost		Fair Value
	(In thousands)
More than one year to five years	$	5,000	$	5,001
Mortgage-backed securities and collateralized mortgage obligations	257,720		272,090
	$	262,720	$	277,091

    Mortgage-backed securities and collateralized mortgage obligations totaling $257.7 million at amortized cost, and $272.1 million at fair value at December 31, 2020, are not classified by maturity in the table above as their expected lives are likely to be shorter than the contractual maturity date due to principal prepayments.

During the year ended December 31, 2020, there were no sales of debt securities held to maturity. During the year ended December 31, 2020, proceeds from called debt securities held to maturity totaled $20.0 million. No gross gains or losses were recognized on the securities which were called.

There were no sales of debt securities held to maturity for the years ended December 31, 2019 and 2018. During the year ended December 31, 2019, proceeds from called debt securities held to maturity totaled $33.4 million, resulting in $24,000 of gross gains and no gross losses. During the year ended December 31, 2018, proceeds from calls and maturities of debt securities held to maturity totaled $5.4 million, resulting in no gross gains or losses.

    Debt securities held to maturity having a carrying value of $220.5 million and $236.0 million, at December 31, 2020 and December 31, 2019, respectively, were pledged as security for public funds on deposit at the Bank as required and permitted by law, pledged for outstanding borrowings at the Federal Home Loan Bank, and pledged for potential borrowings at the Federal Reserve Bank of New York.

    The following tables summarize the fair value and gross unrealized losses of those securities that reported an unrealized loss at December 31, 2020 and 2019 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	December 31, 2020
	Less Than 12 Months				12 Months or Longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
Mortgage-backed securities and collateralized mortgage obligations	$	2,176	$	(2)	$	—	$	—	$	2,176	$	(2)

(5)     Debt Securities Held to Maturity (continued)

	December 31, 2019
	Less than 12 months				12 months or longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
U.S. government and agency obligations	$	9,934	$	(66)	$	—	$	—	$	9,934	$	(66)
Mortgage-backed securities and collateralized mortgage obligations	27,911		(251)		772		(8)		28,683		(259)
	$	37,845	$	(317)	$	772	$	(8)	$	38,617	$	(325)

    The Company evaluates securities for other-than-temporary impairment at each reporting period and more frequently when economic or market conditions warrant such evaluation. The temporary loss position associated with debt securities held to maturity was the result of changes in market interest rates relative to the coupon of the individual security and changes in credit spreads. The Company does not have the intent to sell securities in a temporary loss position at December 31, 2020, nor is it more likely than not that the Company will be required to sell the securities before the anticipated recovery.

    There were two securities in an unrealized loss position as of December 31, 2020, compared with 22 at December 31, 2019. All temporarily impaired securities were investment grade as of December 31, 2020 and 2019.

    The Company did not record an other-than-temporary impairment charge on debt securities held to maturity for the years ended December 31, 2020, 2019, and 2018.

Equity Securities at Fair Value

    The Company has an equity securities portfolio which consists of stock in other financial institutions, a payment technology company, a community bank correspondent services company, and preferred stock in U.S. Government agencies which are reported at fair value on the Company's Consolidated Statements of Financial Condition. The fair value of the equities portfolio at December 31, 2020 and 2019 was $5.4 million and $2.9 million, respectively.

    The Company adopted ASU 2016-01 on January 1, 2019, resulting in a $548,000 after tax cumulative-effect adjustment from other comprehensive income (loss) to retained earnings, as reflected in the Consolidated Statements of Changes in Stockholders' Equity. The Company recorded a net increase in the fair value of equity securities of $767,000 and $305,000 for the years ended December 31, 2020 and 2019, respectively, as a component of non-interest income.

During the years ended December 31, 2020, and 2018, there were no sales of equity securities. During the year ended December 31, 2019 proceeds from the sales of equity securities totaled $1.1 million, resulting in $236,000 of gross gains and no gross losses.

XML

Debt Securities Held to Maturity

12 Months Ended

Dec. 31, 2020

Investments, Debt and Equity Securities [Abstract]

Debt Securities Held to Maturity

Debt Securities Available for Sale

    Debt securities available for sale at December 31, 2020 and 2019 are summarized as follows:

	December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
			(In thousands)
U.S. government and agency obligations	$	24,425	$	1,124	$	—	$	25,549
Mortgage-backed securities and collateralized mortgage obligations	1,163,613		37,343		(562)		1,200,394
Municipal obligations	16,845		17		—		16,862
Corporate debt securities	67,628		2,264		(415)		69,477
Trust preferred securities	5,000		—		(330)		4,670
	$	1,277,511	$	40,748	$	(1,307)	$	1,316,952

	December 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
			(In thousands)
U.S. government and agency obligations	$	42,081	$	321	$	(16)	$	42,386
Mortgage-backed securities and collateralized mortgage obligations	968,165		12,981		(1,265)		979,881
Municipal obligations	2,284		1		(1)		2,284
Corporate debt securities	68,613		945		(378)		69,180
Trust preferred securities	5,000		—		(395)		4,605
	$	1,086,143	$	14,248	$	(2,055)	$	1,098,336

    The amortized cost and fair value of debt securities available for sale at December 31, 2020, by contractual final maturity, is shown below. Expected maturities may differ from contractual maturities due to prepayment or early call options exercised by the issuer.

(4)     Debt Securities Available for Sale (continued)

	December 31, 2020
	Amortized Cost		Fair Value
	(In thousands)
One year or less	$	21,378	$	21,380
More than one year to five years	47,429		49,276
More than five years to ten years	45,091		45,902
	$	113,898	$	116,558
Mortgage-backed securities and collateralized mortgage obligations	1,163,613		1,200,394
	$	1,277,511	$	1,316,952

    Mortgage-backed securities and collateralized mortgage obligations totaling $1.2 billion at amortized cost, and $1.2 billion at fair value, are not classified by maturity in the table above as their expected lives are likely to be shorter than the contractual maturity date due to principal prepayments.

During the year ended December 31, 2020, proceeds from the sale of debt securities available for sale totaled $20.8 million, resulting in $369,000 of gross gains and no gross losses. During the year ended December 31, 2020, proceeds from called debt securities available for sale totaled $11.6 million resulting in $1,000 of gross gains and no gross losses. During the year ended December 31, 2020, proceeds from matured debt securities available for sale totaled $10.9 million.

    During the year ended December 31, 2019, proceeds from the sale of debt securities available for sale totaled $65.2 million, resulting in $2.2 million of gross gains and $22,000 of gross losses. During the year ended December 31, 2019, proceeds from called debt securities available for sale totaled $24.1 million resulting in $174,000 of gross gains and no gross losses. During the year ended December 31, 2019, proceeds from one matured debt security available for sale totaled $797,000.

    During the year ended December 31, 2018, proceeds from the sale of debt securities available for sale totaled $11.5 million, resulting in $116,000 of gross gains and no gross losses. During the year ended December 31, 2018, proceeds from matured debt securities available for sale totaled $2.4 million.

    Debt securities available for sale having a carrying value of $822.2 million and $462.0 million, at December 31, 2020 and 2019, respectively, were pledged as security for public funds on deposit at the Bank as required and permitted by law, pledged for outstanding borrowings at the Federal Home Loan Bank, and pledged for potential borrowings at the Federal Reserve Bank of New York.

    The following tables summarize the fair value and gross unrealized losses of those securities that reported an unrealized loss at December 31, 2020 and 2019 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	December 31, 2020
	Less Than 12 Months				12 Months or Longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
Mortgage-backed securities and collateralized mortgage obligations	$	117,978	$	(481)	$	24,018	$	(81)	$	141,996	$	(562)
Corporate debt securities	9,845		(155)		5,740		(260)		15,585		(415)
Trust preferred securities	—		—		4,670		(330)		4,670		(330)
	$	127,823	$	(636)	$	34,428	$	(671)	$	162,251	$	(1,307)

(4)     Debt Securities Available for Sale (continued)

	December 31, 2019
	Less Than 12 Months				12 Months or Longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
U.S. government and agency obligations	$	5,106	$	(13)	$	4,988	$	(3)	$	10,094	$	(16)
Mortgage-backed securities and collateralized mortgage obligations	178,665		(946)		58,208		(319)		236,873		(1,265)
Municipal obligations	696		(1)		—		—		696		(1)
Corporate debt securities	2,588		(5)		4,627		(373)		7,215		(378)
Trust preferred securities	—		—		4,605		(395)		4,605		(395)
	$	187,055	$	(965)	$	72,428	$	(1,090)	$	259,483	$	(2,055)

    The Company evaluates securities for other-than-temporary impairment at each reporting period and more frequently when economic or market conditions warrant such evaluation. The temporary loss position associated with debt securities available for sale was the result of changes in market interest rates relative to the coupon of the individual security and changes in credit spreads. The Company does not have the intent to sell securities in a temporary loss position at December 31, 2020, nor is it more likely than not that the Company will be required to sell the securities before the anticipated recovery.

    The number of securities in an unrealized loss position at December 31, 2020 totaled 40, compared with 97 at December 31, 2019. All temporarily impaired securities were investment grade as of December 31, 2020 and 2019.

    The Company did not record an other-than-temporary impairment charge on debt securities available for sale during the years ended December 31, 2020, 2019, and 2018.

Debt Securities Held to Maturity

    Debt securities held to maturity at December 31, 2020 and 2019 are summarized as follows:

	December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
	(In thousands)
U.S. government and agency obligations	$	5,000	$	1	$	—	$	5,001
Mortgage-backed securities and collateralized mortgage obligations	257,720		14,372		(2)		272,090
	$	262,720	$	14,373	$	(2)	$	277,091

	December 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
	(In thousands)
U.S. government and agency obligations	$	20,000	$	26	$	(66)	$	19,960
Mortgage-backed securities and collateralized mortgage obligations	265,756		4,048		(259)		269,545
	$	285,756	$	4,074	$	(325)	$	289,505

(5)     Debt Securities Held to Maturity (continued)    

The amortized cost and fair value of debt securities held to maturity at December 31, 2020, by contractual final maturity, is shown below. Expected maturities may differ from contractual maturities due to prepayment or early call options exercised by the issuer.

	December 31, 2020
	Amortized Cost		Fair Value
	(In thousands)
More than one year to five years	$	5,000	$	5,001
Mortgage-backed securities and collateralized mortgage obligations	257,720		272,090
	$	262,720	$	277,091

    Mortgage-backed securities and collateralized mortgage obligations totaling $257.7 million at amortized cost, and $272.1 million at fair value at December 31, 2020, are not classified by maturity in the table above as their expected lives are likely to be shorter than the contractual maturity date due to principal prepayments.

During the year ended December 31, 2020, there were no sales of debt securities held to maturity. During the year ended December 31, 2020, proceeds from called debt securities held to maturity totaled $20.0 million. No gross gains or losses were recognized on the securities which were called.

There were no sales of debt securities held to maturity for the years ended December 31, 2019 and 2018. During the year ended December 31, 2019, proceeds from called debt securities held to maturity totaled $33.4 million, resulting in $24,000 of gross gains and no gross losses. During the year ended December 31, 2018, proceeds from calls and maturities of debt securities held to maturity totaled $5.4 million, resulting in no gross gains or losses.

    Debt securities held to maturity having a carrying value of $220.5 million and $236.0 million, at December 31, 2020 and December 31, 2019, respectively, were pledged as security for public funds on deposit at the Bank as required and permitted by law, pledged for outstanding borrowings at the Federal Home Loan Bank, and pledged for potential borrowings at the Federal Reserve Bank of New York.

    The following tables summarize the fair value and gross unrealized losses of those securities that reported an unrealized loss at December 31, 2020 and 2019 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	December 31, 2020
	Less Than 12 Months				12 Months or Longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
Mortgage-backed securities and collateralized mortgage obligations	$	2,176	$	(2)	$	—	$	—	$	2,176	$	(2)

(5)     Debt Securities Held to Maturity (continued)

	December 31, 2019
	Less than 12 months				12 months or longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
U.S. government and agency obligations	$	9,934	$	(66)	$	—	$	—	$	9,934	$	(66)
Mortgage-backed securities and collateralized mortgage obligations	27,911		(251)		772		(8)		28,683		(259)
	$	37,845	$	(317)	$	772	$	(8)	$	38,617	$	(325)

    The Company evaluates securities for other-than-temporary impairment at each reporting period and more frequently when economic or market conditions warrant such evaluation. The temporary loss position associated with debt securities held to maturity was the result of changes in market interest rates relative to the coupon of the individual security and changes in credit spreads. The Company does not have the intent to sell securities in a temporary loss position at December 31, 2020, nor is it more likely than not that the Company will be required to sell the securities before the anticipated recovery.

    There were two securities in an unrealized loss position as of December 31, 2020, compared with 22 at December 31, 2019. All temporarily impaired securities were investment grade as of December 31, 2020 and 2019.

    The Company did not record an other-than-temporary impairment charge on debt securities held to maturity for the years ended December 31, 2020, 2019, and 2018.

Equity Securities at Fair Value

    The Company has an equity securities portfolio which consists of stock in other financial institutions, a payment technology company, a community bank correspondent services company, and preferred stock in U.S. Government agencies which are reported at fair value on the Company's Consolidated Statements of Financial Condition. The fair value of the equities portfolio at December 31, 2020 and 2019 was $5.4 million and $2.9 million, respectively.

    The Company adopted ASU 2016-01 on January 1, 2019, resulting in a $548,000 after tax cumulative-effect adjustment from other comprehensive income (loss) to retained earnings, as reflected in the Consolidated Statements of Changes in Stockholders' Equity. The Company recorded a net increase in the fair value of equity securities of $767,000 and $305,000 for the years ended December 31, 2020 and 2019, respectively, as a component of non-interest income.

During the years ended December 31, 2020, and 2018, there were no sales of equity securities. During the year ended December 31, 2019 proceeds from the sales of equity securities totaled $1.1 million, resulting in $236,000 of gross gains and no gross losses.

XML

Equity Securities at Fair Value

12 Months Ended

Dec. 31, 2020

Investments, Debt and Equity Securities [Abstract]

Equity Securities at Fair Value

Debt Securities Available for Sale

    Debt securities available for sale at December 31, 2020 and 2019 are summarized as follows:

	December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
			(In thousands)
U.S. government and agency obligations	$	24,425	$	1,124	$	—	$	25,549
Mortgage-backed securities and collateralized mortgage obligations	1,163,613		37,343		(562)		1,200,394
Municipal obligations	16,845		17		—		16,862
Corporate debt securities	67,628		2,264		(415)		69,477
Trust preferred securities	5,000		—		(330)		4,670
	$	1,277,511	$	40,748	$	(1,307)	$	1,316,952

	December 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
			(In thousands)
U.S. government and agency obligations	$	42,081	$	321	$	(16)	$	42,386
Mortgage-backed securities and collateralized mortgage obligations	968,165		12,981		(1,265)		979,881
Municipal obligations	2,284		1		(1)		2,284
Corporate debt securities	68,613		945		(378)		69,180
Trust preferred securities	5,000		—		(395)		4,605
	$	1,086,143	$	14,248	$	(2,055)	$	1,098,336

    The amortized cost and fair value of debt securities available for sale at December 31, 2020, by contractual final maturity, is shown below. Expected maturities may differ from contractual maturities due to prepayment or early call options exercised by the issuer.

(4)     Debt Securities Available for Sale (continued)

	December 31, 2020
	Amortized Cost		Fair Value
	(In thousands)
One year or less	$	21,378	$	21,380
More than one year to five years	47,429		49,276
More than five years to ten years	45,091		45,902
	$	113,898	$	116,558
Mortgage-backed securities and collateralized mortgage obligations	1,163,613		1,200,394
	$	1,277,511	$	1,316,952

    Mortgage-backed securities and collateralized mortgage obligations totaling $1.2 billion at amortized cost, and $1.2 billion at fair value, are not classified by maturity in the table above as their expected lives are likely to be shorter than the contractual maturity date due to principal prepayments.

During the year ended December 31, 2020, proceeds from the sale of debt securities available for sale totaled $20.8 million, resulting in $369,000 of gross gains and no gross losses. During the year ended December 31, 2020, proceeds from called debt securities available for sale totaled $11.6 million resulting in $1,000 of gross gains and no gross losses. During the year ended December 31, 2020, proceeds from matured debt securities available for sale totaled $10.9 million.

    During the year ended December 31, 2019, proceeds from the sale of debt securities available for sale totaled $65.2 million, resulting in $2.2 million of gross gains and $22,000 of gross losses. During the year ended December 31, 2019, proceeds from called debt securities available for sale totaled $24.1 million resulting in $174,000 of gross gains and no gross losses. During the year ended December 31, 2019, proceeds from one matured debt security available for sale totaled $797,000.

    During the year ended December 31, 2018, proceeds from the sale of debt securities available for sale totaled $11.5 million, resulting in $116,000 of gross gains and no gross losses. During the year ended December 31, 2018, proceeds from matured debt securities available for sale totaled $2.4 million.

    Debt securities available for sale having a carrying value of $822.2 million and $462.0 million, at December 31, 2020 and 2019, respectively, were pledged as security for public funds on deposit at the Bank as required and permitted by law, pledged for outstanding borrowings at the Federal Home Loan Bank, and pledged for potential borrowings at the Federal Reserve Bank of New York.

    The following tables summarize the fair value and gross unrealized losses of those securities that reported an unrealized loss at December 31, 2020 and 2019 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	December 31, 2020
	Less Than 12 Months				12 Months or Longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
Mortgage-backed securities and collateralized mortgage obligations	$	117,978	$	(481)	$	24,018	$	(81)	$	141,996	$	(562)
Corporate debt securities	9,845		(155)		5,740		(260)		15,585		(415)
Trust preferred securities	—		—		4,670		(330)		4,670		(330)
	$	127,823	$	(636)	$	34,428	$	(671)	$	162,251	$	(1,307)

(4)     Debt Securities Available for Sale (continued)

	December 31, 2019
	Less Than 12 Months				12 Months or Longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
U.S. government and agency obligations	$	5,106	$	(13)	$	4,988	$	(3)	$	10,094	$	(16)
Mortgage-backed securities and collateralized mortgage obligations	178,665		(946)		58,208		(319)		236,873		(1,265)
Municipal obligations	696		(1)		—		—		696		(1)
Corporate debt securities	2,588		(5)		4,627		(373)		7,215		(378)
Trust preferred securities	—		—		4,605		(395)		4,605		(395)
	$	187,055	$	(965)	$	72,428	$	(1,090)	$	259,483	$	(2,055)

    The Company evaluates securities for other-than-temporary impairment at each reporting period and more frequently when economic or market conditions warrant such evaluation. The temporary loss position associated with debt securities available for sale was the result of changes in market interest rates relative to the coupon of the individual security and changes in credit spreads. The Company does not have the intent to sell securities in a temporary loss position at December 31, 2020, nor is it more likely than not that the Company will be required to sell the securities before the anticipated recovery.

    The number of securities in an unrealized loss position at December 31, 2020 totaled 40, compared with 97 at December 31, 2019. All temporarily impaired securities were investment grade as of December 31, 2020 and 2019.

    The Company did not record an other-than-temporary impairment charge on debt securities available for sale during the years ended December 31, 2020, 2019, and 2018.

Debt Securities Held to Maturity

    Debt securities held to maturity at December 31, 2020 and 2019 are summarized as follows:

	December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
	(In thousands)
U.S. government and agency obligations	$	5,000	$	1	$	—	$	5,001
Mortgage-backed securities and collateralized mortgage obligations	257,720		14,372		(2)		272,090
	$	262,720	$	14,373	$	(2)	$	277,091

	December 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
	(In thousands)
U.S. government and agency obligations	$	20,000	$	26	$	(66)	$	19,960
Mortgage-backed securities and collateralized mortgage obligations	265,756		4,048		(259)		269,545
	$	285,756	$	4,074	$	(325)	$	289,505

(5)     Debt Securities Held to Maturity (continued)    

The amortized cost and fair value of debt securities held to maturity at December 31, 2020, by contractual final maturity, is shown below. Expected maturities may differ from contractual maturities due to prepayment or early call options exercised by the issuer.

	December 31, 2020
	Amortized Cost		Fair Value
	(In thousands)
More than one year to five years	$	5,000	$	5,001
Mortgage-backed securities and collateralized mortgage obligations	257,720		272,090
	$	262,720	$	277,091

    Mortgage-backed securities and collateralized mortgage obligations totaling $257.7 million at amortized cost, and $272.1 million at fair value at December 31, 2020, are not classified by maturity in the table above as their expected lives are likely to be shorter than the contractual maturity date due to principal prepayments.

During the year ended December 31, 2020, there were no sales of debt securities held to maturity. During the year ended December 31, 2020, proceeds from called debt securities held to maturity totaled $20.0 million. No gross gains or losses were recognized on the securities which were called.

There were no sales of debt securities held to maturity for the years ended December 31, 2019 and 2018. During the year ended December 31, 2019, proceeds from called debt securities held to maturity totaled $33.4 million, resulting in $24,000 of gross gains and no gross losses. During the year ended December 31, 2018, proceeds from calls and maturities of debt securities held to maturity totaled $5.4 million, resulting in no gross gains or losses.

    Debt securities held to maturity having a carrying value of $220.5 million and $236.0 million, at December 31, 2020 and December 31, 2019, respectively, were pledged as security for public funds on deposit at the Bank as required and permitted by law, pledged for outstanding borrowings at the Federal Home Loan Bank, and pledged for potential borrowings at the Federal Reserve Bank of New York.

    The following tables summarize the fair value and gross unrealized losses of those securities that reported an unrealized loss at December 31, 2020 and 2019 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	December 31, 2020
	Less Than 12 Months				12 Months or Longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
Mortgage-backed securities and collateralized mortgage obligations	$	2,176	$	(2)	$	—	$	—	$	2,176	$	(2)

(5)     Debt Securities Held to Maturity (continued)

	December 31, 2019
	Less than 12 months				12 months or longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
U.S. government and agency obligations	$	9,934	$	(66)	$	—	$	—	$	9,934	$	(66)
Mortgage-backed securities and collateralized mortgage obligations	27,911		(251)		772		(8)		28,683		(259)
	$	37,845	$	(317)	$	772	$	(8)	$	38,617	$	(325)

    The Company evaluates securities for other-than-temporary impairment at each reporting period and more frequently when economic or market conditions warrant such evaluation. The temporary loss position associated with debt securities held to maturity was the result of changes in market interest rates relative to the coupon of the individual security and changes in credit spreads. The Company does not have the intent to sell securities in a temporary loss position at December 31, 2020, nor is it more likely than not that the Company will be required to sell the securities before the anticipated recovery.

    There were two securities in an unrealized loss position as of December 31, 2020, compared with 22 at December 31, 2019. All temporarily impaired securities were investment grade as of December 31, 2020 and 2019.

    The Company did not record an other-than-temporary impairment charge on debt securities held to maturity for the years ended December 31, 2020, 2019, and 2018.

Equity Securities at Fair Value

    The Company has an equity securities portfolio which consists of stock in other financial institutions, a payment technology company, a community bank correspondent services company, and preferred stock in U.S. Government agencies which are reported at fair value on the Company's Consolidated Statements of Financial Condition. The fair value of the equities portfolio at December 31, 2020 and 2019 was $5.4 million and $2.9 million, respectively.

    The Company adopted ASU 2016-01 on January 1, 2019, resulting in a $548,000 after tax cumulative-effect adjustment from other comprehensive income (loss) to retained earnings, as reflected in the Consolidated Statements of Changes in Stockholders' Equity. The Company recorded a net increase in the fair value of equity securities of $767,000 and $305,000 for the years ended December 31, 2020 and 2019, respectively, as a component of non-interest income.

During the years ended December 31, 2020, and 2018, there were no sales of equity securities. During the year ended December 31, 2019 proceeds from the sales of equity securities totaled $1.1 million, resulting in $236,000 of gross gains and no gross losses.

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Loans Receivable and Allowance for Loan Losses

12 Months Ended

Dec. 31, 2020

Receivables [Abstract]

Loans Receivable and Allowance for Loan Losses

Loans Receivable and Allowance for Loan Losses

    Loans receivable at December 31, 2020 and 2019 are summarized as follows:

	December 31,
	2020		2019
	(In thousands)
Real estate loans:
One-to-four family	$	1,940,327	$	2,077,079
Multifamily and commercial	2,817,965		2,919,985
Construction	328,711		298,942
Commercial business loans	752,870		483,215
Consumer loans:
Home equity loans and advances	321,177		388,127
Other consumer loans	1,497		1,960
Total gross loans	6,162,547		6,169,308
Purchased credit-impaired loans	6,345		7,021
Net deferred loan costs, fees and purchased premiums and discounts	12,878		21,237
Loans receivable	$	6,181,770	$	6,197,566

    The Company had $4.1 million of SBA loans held-for-sale at December 31, 2020. The Company had no loans held-for-sale at December 31, 2019. During the year ended December 31, 2020, the Company sold $111.8 million of one-to-four family real estate loans held-for-sale, resulting in gross gains of $1.7 million and no gross losses. During the year ended December 31, 2019, the Company sold $97.4 million, $4.3 million, and $164,000 of one-to-four family real estate, fixed rate home equity loans, multifamily and commercial real estate and commercial business loans held-for-sale, respectively, resulting in gross gains of $718,000 and no gross losses. During the year ended December 31, 2018, the Company sold $3.6 million of one-to-four family real estate and fixed rate home equity loans, which resulted in no gross gains or losses.

    During the year ended December 31, 2020, the Company sold $15.1 million, $13.0 million, and $7.6 million of one-to-four family real estate, fixed rate home equity loans, construction loans and commercial business loans, respectively, included in loans receivable, resulting in gross gains of $161,000 and no gross losses. During the year ended December 31, 2019, the Company sold $5.3 million, $5.5 million, and $901,000 of one-to-four family real estate, fixed rate home equity loans, and multifamily and commercial real estate and commercial business loans, respectively, included in loans receivable, resulting in gross gains of $67,000 and no gross losses. During the year ended December 31, 2018, the Company sold $32.0 million of one-to-four family real estate and fixed rate home equity loans included in loans receivable, resulting in gross gains of $618,000 and no gross losses.

    During the year ended December 31, 2020, there were no loans purchased by the Company. During the years ended December 31, 2019 and 2018, the Company purchased $89.8 million of one-to-four family real estate loans from third parties and purchased $32.3 million of multifamily and commercial real estate loans from third parties.

At December 31, 2020, commercial business loans included $344.4 million SBA PPP loans and net deferred fees related to these loans totaling $6.6 million. At December 31, 2019 there were no SBA PPP loans.

    At December 31, 2020 and 2019, the carrying value of loans serviced by the Company for investors was $598.0 million and $526.3 million, respectively. These loans are not included in the Consolidated Statements of Financial Condition. Servicing income totaled $1.4 million, $1.2 million, and $1.1 million for the years ended December 31, 2020, 2019 and 2018.

    The Company has entered into Guarantor Swaps with Freddie Mac which results in improved liquidity. During the year ended December 31, 2020, the Company exchanged $117.3 million of loans for Freddie Mac mortgage participation certificates, resulting in gross gains of $3.5 million and no gross losses. During the year ended December 31, 2019, the Company exchanged $21.6 million of loans for Freddie Mac mortgage participation certificates. During the year ended December 31, 2018, no loans were exchanged for a Freddie Mac Mortgage participation certificate. The Company retained the servicing of these loans.

(7)     Loans Receivable and Allowance for Loan Losses (continued)

The Company has granted loans to certain officers and directors of the Company and its subsidiaries and to their associates. At December 31, 2020 and 2019, such loans totaled approximately $1.6 million and $1.1 million, respectively. During the year ended December 31, 2020, the Bank granted one new loan to a related party totaling $300,000. During the years ended December 31, 2019 and 2018, no new loans were granted to related parties. These loans are performing in accordance with their original terms.

    The following tables summarize the aging of loans receivable by portfolio segment, including non-accrual loans and excluding PCI loans at December 31, 2020 and 2019:

	December 31, 2020
	30-59 Days		60-89 Days		90 Days or More		Total Past Due		Non-accrual		Current		Total
	(In thousands)
Real estate loans:
One-to-four family	$	3,068	$	912	$	1,901	$	5,881	$	2,637	$	1,931,809	$	1,940,327
Multifamily and commercial	15,645		—		1,238		16,883		1,873		2,799,209		2,817,965
Construction	550		—		—		550		—		328,161		328,711
Commercial business loans	2,343		1,056		2,453		5,852		2,968		744,050		752,870
Consumer loans:
Home equity loans and advances	1,156		696		394		2,246		678		318,253		321,177
Other consumer loans	4		—		—		4		—		1,493		1,497
Total loans	$	22,766	$	2,664	$	5,986	31,416		$	8,156	$	6,122,975	$	6,162,547

	December 31, 2019
	30-59 Days		60-89 Days		90 Days or More		Total Past Due		Non-accrual		Current		Total
	(In thousands)
Real estate loans:
One-to-four family	$	6,249	$	2,132	$	1,638	$	10,019	$	1,732	$	2,065,328	$	2,077,079
Multifamily and commercial	626		1,210		716		2,552		716		2,916,717		2,919,985
Construction	—		—		—		—		—		298,942		298,942
Commercial business loans	1,056		—		2,489		3,545		3,686		475,984		483,215
Consumer loans:
Home equity loans and advances	1,708		246		405		2,359		553		385,215		388,127
Other consumer loans	3		—		—		3		—		1,957		1,960
Total loans	$	9,642	$	3,588	$	5,248	18,478		$	6,687	$	6,144,143	$	6,169,308

    The Company considers a loan to be delinquent when we have not received a payment within 30 days of its contractual due date. Generally, a loan is designated as a non-accrual loan when the payment of interest is 90 days or more in arrears of its contractual due date. Non-accruing loans are returned to an accrual status after there has been a sustained period of repayment performance (generally six consecutive months of payments) and both principal and interest are deemed collectible. The Company identifies loans that may need to be charged-off as a loss, by reviewing all delinquent loans, classified loans and other loans that management may have concerns about collectability. At December 31, 2020 and 2019, non-accrual loans totaled $8.2 million and $6.7 million, respectively. Included in non-accrual loans at December 31, 2020, are 19 loans totaling $2.2 million which are less than 90 days in arrears. At December 31, 2019, eight loans totaling $1.5 million, were less than 90 days in arrears.

(7)     Loans Receivable and Allowance for Loan Losses (continued)

If non-accrual loans had performed in accordance with their original terms, interest income would have increased by $426,000, $509,000, and $126,000 for the years ended December 31, 2020, 2019 and 2018, respectively. The amount of cash basis interest income that was recognized on these loans during the years ended December 31, 2020, 2019 and 2018, was $410,000, $437,000, and $89,000, respectively.

At December 31, 2020 and 2019, there were no loans past due 90 days or more still accruing interest other than COVID-19 related loan forbearance and deferrals. In accordance with the CARES Act, these loans are not included in the aging of loans receivable by portfolio segment in the table above, and the Bank continues to accrue interest income during the forbearance or deferral period. If adverse information indicating that the borrower's capability of repaying all amounts due is unlikely, the interest accrual will cease.

PCI loans are loans acquired at a discount primarily due to deteriorated credit quality. These loans are initially recorded at fair value at acqisition, based upon the present value of expected future cash flows, with no related allowance for loan losses, and aggregated and accounted for as pools of loans based on common risk characteristics. The difference between the undiscounted cash flows expected at acquisition and the initial carrying amount (fair value) of the PCI loans, or the “accretable yield,” is recognized as interest income utilizing the level-yield method over the life of each pool. Contractually required payments for interest and principal that exceed the undiscounted cash flows expected at acquisition, or the “non-accretable difference,” are not recognized as a yield adjustment, as a loss accrual or a valuation allowance. Reclassifications of the non-accretable difference to the accretable yield may occur subsequent to the loan acquisition dates due to increases in expected cash flows of the loan pools. See note 3 for additional information.

The following table presents information regarding the estimates of the contractually required payments, the cash flows expected to be collected, and the estimated fair value of the PCI loans acquired in the Stewardship acquisition as of November 1, 2019 (See note 3 for more details):

	November 1, 2019
	(In thousands)
Contractually required principal and interest	$	9,286
Contractual cash flows not expected to be collected (non-accretable difference)	(1,823)
Expected cash flows to be collected	7,463
Interest component of expected cash flows (accretable yield)	(556)
Fair value of acquired loans	$	6,907

The following table presents information regarding the estimates of the contractually required payments, the cash flows expected to be collected, and the estimated fair value of the PCI loans acquired in the Roselle acquisition as of April 1, 2020 (See note 3 for more details):

	April 1, 2020
	(In thousands)
Contractually required principal and interest	$	461
Contractual cash flows not expected to be collected (non-accretable difference)	(237)
Expected cash flows to be collected	224
Interest component of expected cash flows (accretable yield)	(51)
Fair value of acquired loans	$	173

(7) Loans Receivable and Allowance for Loan Losses (continued)

The following table presents changes in accretable yield for PCI loans for the years ended December 31, 2020 and 2019:

	December 31,
	2020		2019
	(In thousands)
Balance at beginning of period	$	511	$	—
Acquisition	58		556
Accretion	(34)		(30)
Net change in expected cash flows	(117)		(15)
Balance at end of period	$	418	$	511

The net increase in expected cash flows for certain pools of loans included in the table above is recognized prospectively as an adjustment to the yield over the estimated remaining life of the individual pools.

    We may obtain physical possession of real estate collateralizing a residential mortgage loan via foreclosure or through an in-substance repossession. At December 31, 2020 and 2019, the Company had no real estate owned. At of December 31, 2020 and 2019, we had two and four residential mortgage loans with carrying values totaling $398,000 and $522,000, respectively, collateralized by residential real estate which are in the process of foreclosure. The states of New Jersey, New York and Pennsylvania have issued executive orders which declare moratoriums on removing individuals from a residential property until at least two months after the COVID health crisis has ended. In response to these orders, in March 2020, the Company temporarily suspended residential property foreclosure sales and evictions.

    The Company maintains the allowance for loan losses through provisions for loan losses which are charged to income. Charge-offs against the allowance for loan losses are taken on loans where management determines that the collection of loan principal is unlikely. Recoveries made on loans that have been charged-off are credited to the allowance for loan losses.

    As part of the evaluation of the adequacy of the allowance for loan losses, management prepares an analysis each quarter that categorizes the entire loan portfolio by certain risk characteristics such as loan type (residential mortgage, commercial mortgage, construction, commercial business, etc.) and loan risk rating.

    The Company utilizes an eight-point risk rating system to summarize its loan portfolio into categories with similar risk characteristics. Loans deemed to be “acceptable quality” are rated 1 through 4 (Pass), with a rating of 1 established for loans with minimal risk. Loans that are deemed to be of “questionable quality” are rated 5 (Special Mention) or 6 (Substandard). Loans with adverse classifications are rated 7 (Doubtful) or 8 (Loss). The risk ratings are also confirmed through periodic loan review examinations, which are currently performed by both an independent third-party and the Company's credit risk review department. The Company requires an annual review be performed above certain dollar thresholds, depending on loan type, to help determine the appropriate risk ratings. Results from examinations are presented to the Audit Committee of the Board of Directors.

    Management estimates the allowance for loans collectively evaluated for impairment by applying quantitative loss factors to the loan segments by risk rating and determining adjustments to each loan segment at an overall level. Quantitative loss factors give consideration to historical loss experience and migration experience by loan type based on an appropriate look-back period, adjusted for a loss emergence period.

Qualitative adjustments give consideration to other qualitative or environmental factors such as trends and levels of delinquencies, impaired loans, charge-offs, recoveries and loan volumes, as well as national and local economic trends and conditions.

    Qualitative adjustments reflect risks in the loan portfolio not captured by the quantitative loss factors and, as such, are evaluated relative to the risk levels present over the look-back period. The reserves resulting from the application of both the quantitative experience and qualitative factors are combined to arrive at the allowance for loan losses for loans collectively evaluated for impairment.

    Management believes the primary risks inherent in the portfolio are a general decline in the economy, a decline in real estate market values, rising unemployment, increasing vacancy rates, and increases in interest rates in the absence of economic improvement. Any one or a combination of these events may adversely affect a borrowers’ ability to repay its loan, resulting in increased delinquencies and loan losses. Accordingly, the Company has recorded loan losses at a level which is estimated to represent the current risk in its loan portfolio. Management considers it important to maintain the ratio of the allowance for loan losses to total loans at an acceptable level considering the current composition of the loan portfolio.

(7)     Loans Receivable and Allowance for Loan Losses (continued)

    Although management believes that the Company has established and maintains the allowance for loan losses at appropriate levels, additional reserves may be necessary if future economic and other conditions differ substantially from the current operating environment. Management evaluates its estimates and assumptions on an ongoing basis and the estimates and assumptions are adjusted when facts and circumstances necessitate a re-valuation of the estimate. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. In addition, regulatory agencies periodically review the adequacy of the Company’s allowance for loan losses as an integral part of their examination process. Such agencies may require the Company to recognize additions to the allowance or additional write-downs based on their judgments about information available to them at the time of their examination. Although management uses the best information available, the level of the allowance for loan losses remains an estimate that is subject to significant judgement

    The Bank defines a loan as impaired when, based on current information and events, it is probable that a creditor will be unable to collect all amounts due under the contractual terms of the loan agreement. All multifamily and commercial real estate, construction, and commercial business loans with an outstanding balance of greater than $500,000 and not accruing interest, loans modified in a troubled debt restructuring (TDR), and other loans if there is specific information of a collateral shortfall are individually evaluated for impairment. Impairment is measured by determining the present value of expected future cash flows or, for collateral-dependent loans, the fair value of the collateral less estimated selling costs.

    The following tables summarize loans receivable (including PCI loans) and allowance for loan losses by portfolio segment and impairment method at December 31, 2020 and 2019:

	December 31, 2020
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Allowance for loan losses:
Individually evaluated for impairment	$	391	$	601	$	—	$	84	$	12	$	—	$	1,088
Collectively evaluated for impairment	13,195		30,080		11,271		17,300		1,736		6		73,588
Loans acquired with deteriorated credit quality	—		—		—		—		—		—		—
Total	$	13,586	$	30,681	$	11,271	$	17,384	$	1,748	$	6	$	74,676
Total loans:
Individually evaluated for impairment	$	7,257	$	32,792	$	—	$	3,447	$	1,651	$	—	$	45,147
Collectively evaluated for impairment	1,933,070		2,785,173		328,711		749,423		319,526		1,497		6,117,400
Loans acquired with deteriorated credit quality	309		4,893		—		1,143		—		—		6,345
Total loans	$	1,940,636	$	2,822,858	$	328,711	$	754,013	$	321,177	$	1,497	$	6,168,892

(7)     Loans Receivable and Allowance for Loan Losses (continued)

	December 31, 2019
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Allowance for loan losses:
Individually evaluated for impairment	$	484	$	2	$	—	$	1,121	$	14	$	—	$	1,621
Collectively evaluated for impairment	13,296		22,978		7,435		14,715		1,655		9		60,088
Loans acquired with deteriorated credit quality	—		—		—		—		—		—		—
Total	$	13,780	$	22,980	$	7,435	$	15,836	$	1,669	$	9	$	61,709
Total loans:
Individually evaluated for impairment	$	8,891	$	2,599	$	—	$	5,178	$	2,143	$	—	$	18,811
Collectively evaluated for impairment	2,068,188		2,917,386		298,942		478,037		385,984		1,960		6,150,497
Loans acquired with deteriorated credit quality	429		4,866		—		1,726		—		—		7,021
Total loans	$	2,077,508	$	2,924,851	$	298,942	$	484,941	$	388,127	$	1,960	$	6,176,329

Loan modifications to borrowers experiencing financial difficulties that are considered troubled debt restructurings ("TDRs") primarily involve the lowering of the monthly payments on such loans through either a reduction in interest rate below a market rate, an extension of the term of the loan without a corresponding adjustment to the risk premium reflected in the interest rate, or a combination of these two methods. These modifications generally do not result in the forgiveness of principal or accrued interest. In addition, the Company attempts to obtain additional collateral or guarantor support when modifying such loans. Non-accruing restructured loans may be returned to accrual status when there has been a sustained period of repayment performance (generally six consecutive months of payments) and both principal and interest are deemed collectible.

Section 4013 of the CARES Act, “Temporary Relief from Troubled Debt Restructurings,” allows banks to temporarily suspend certain requirements under GAAP related to TDRs for a limited period of time to account for the effects of COVID-19. The Bank elected to account for modifications on certain loans under Section 4013 of the CARES Act or, if the loan modification was not eligible under Section 4013, used the criteria in the COVID-19 guidance to determine when the loan modification was not a TDR in accordance with ASC 310-40. Guidance noted that modification or deferral programs mandated by the federal or a state government related to COVID-19 would not be in the scope of ASC 310-40, such as a state program that requires all institutions within that state to suspend mortgage payments for a specified period. These short-term loan modifications will not be treated as troubled debt restructurings during the short-term modification period if the loan was not in arrears at December 31, 2019. Furthermore, based on current evaluations, generally, we have continued the accrual of interest on these loans during the short-term modification period. The Consolidated Appropriations Act, 2021, which was enacted in late December 2020, extended certain provisions of the CARES Act, including provisions permitting loan deferral extension requests to not be treated as troubled debt restructurings.

    The following tables present the number of loans modified as TDRs during the years ended December 31, 2020, 2019 and 2018, along with their balances immediately prior to the modification date and post-modification. Post-modification recorded investment represents the net book balance immediately following modification.

(7)     Loans Receivable and Allowance for Loan Losses (continued)

	For the Years Ended December 31,
	2020					2019
	No. of Loans	Pre-modification Recorded Investment		Post-modification Recorded Investment		No. of Loans	Pre-modification Recorded Investment		Post-modification Recorded Investment
	(Dollars in thousands)
Troubled Debt Restructurings
Real estate loans:
Multifamily and commercial	5	$	17,022	$	17,022	—	$	—	$	—
Commercial business loans	2	11,507		12,802		1	4,095		4,095
Total restructured loans	7	$	28,529	$	29,824	1	$	4,095	$	4,095

	For the Year Ended December 31,
	2018
	No. of Loans	Pre-modification Recorded Investment		Post-modification Recorded Investment
		(Dollars in thousands)
Troubled Debt Restructurings
Real estate loans:
One-to-four family	5	$	801	$	801
Multifamily and commercial	1	65		65
Consumer loans:
Home equity loans and advances	1	588		588
Total restructured loans	7	$	1,454	$	1,454

    The activity in the allowance for loan losses for the years ended December 31, 2020, 2019 and 2018, are as follows:

	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Balance at beginning of period	$	61,709	$	62,342	$	58,178
Provision charged	18,447		4,224		6,677
Recoveries	823		496		707
Charge-offs	(6,303)		(5,353)		(3,220)
Balance at end of period	$	74,676	$	61,709	$	62,342

(7)     Loans Receivable and Allowance for Loan Losses (continued)

    The activity in the allowance for loan losses by portfolio segment for the years ended December 31, 2020, 2019 and 2018, are as follows:

	For the Year Ended December 31, 2020
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Balance at beginning of period	$	13,780	$	22,980	$	7,435	$	15,836	$	1,669	$	9	$	61,709
Provision charged (credited)	1,299		7,713		3,835		5,360		239		1		18,447
Recoveries	438		16		1		308		60		—		823
Charge-offs	(1,931)		(28)		—		(4,120)		(220)		(4)		(6,303)
Balance at end of period	$	13,586	$	30,681	$	11,271	$	17,384	$	1,748	$	6	$	74,676

	For the Year Ended December 31, 2019
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Balance at beginning of period	$	15,232	$	23,251	$	7,217	$	14,176	$	2,458	$	8	$	62,342
Provision charged (credited)	(429)		(178)		216		5,250		(638)		3		4,224
Recoveries	30		10		2		404		50		—		496
Charge-offs	(1,053)		(103)		—		(3,994)		(201)		(2)		(5,353)
Balance at end of period	$	13,780	$	22,980	$	7,435	$	15,836	$	1,669	$	9	$	61,709

	For the Year Ended December 31, 2018
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Unallocated		Total
	(In thousands)
Balance at beginning of period	$	19,991	$	19,933	$	5,217	$	8,275	$	4,576	$	8	$	178	$	58,178
Provision charged (credited)	(4,503)		3,445		1,997		7,860		(1,949)		5		(178)		6,677
Recoveries	334		2		3		240		122		6		—		707
Charge-offs	(590)		(129)		—		(2,199)		(291)		(11)		—		(3,220)
Balance at end of period	$	15,232	$	23,251	$	7,217	$	14,176	$	2,458	$	8	$	—	$	62,342

(7)     Loans Receivable and Allowance for Loan Losses (continued)

    The following tables present loans individually evaluated for impairment by loan segment, excluding PCI loans, at December 31, 2020 and 2019:

	At December 31, 2020
	Recorded Investment		Unpaid Principal Balance		Specific Allowance
	(In thousands)
With no allowance recorded:
Real estate loans:
One-to-four family	$	3,344	$	3,898	$	—
Multifamily and commercial	13,058		13,094		—
Commercial business loans	1,945		1,945		—
Consumer loans:
Home equity loans and advances	714		851		—
	19,061		19,788		—
With a specific allowance recorded:
Real estate loans:
One-to-four family	3,913		3,919		391
Multifamily and commercial	19,734		20,350		601
Commercial business loans	1,502		1,502		84
Consumer loans:
Home equity loans and advances	937		937		12
	26,086		26,708		1,088
Total:
Real estate loans:
One-to-four family	7,257		7,817		391
Multifamily and commercial	32,792		33,444		601
Commercial business loans	3,447		3,447		84
Consumer loans:
Home equity loans and advances	1,651		1,788		12
Total loans	$	45,147	$	46,496	$	1,088

(7)     Loans Receivable and Allowance for Loan Losses (continued)

	At December 31, 2019
	Recorded Investment		Unpaid Principal Balance		Specific Allowance
	(In thousands)
With no allowance recorded:
Real estate loans:
One-to-four family	$	4,314	$	5,473	$	—
Multifamily and commercial	1,494		2,191		—
Commercial business loans	3,859		4,048		—
Consumer loans:
Home equity loans and advances	1,080		1,217		—
	10,747		12,929		—
With a specific allowance recorded:
Real estate loans:
One-to-four family	4,577		4,613		484
Multifamily and commercial	1,105		1,105		2
Commercial business loans	1,319		4,307		1,121
Consumer loans:
Home equity loans and advances	1,063		1,063		14
	8,064		11,088		1,621
Total:
Real estate loans:
One-to-four family	8,891		10,086		484
Multifamily and commercial	2,599		3,296		2
Commercial business loans	5,178		8,355		1,121
Consumer loans:
Home equity loans and advances	2,143		2,280		14
Total loans	$	18,811	$	24,017	$	1,621

    Specific allocations of the allowance for loan losses attributable to impaired loans totaled $1.1 million and $1.6 million at December 31, 2020 and 2019, respectively. At December 31, 2020 and 2019, impaired loans for which there was no related allowance for loan losses totaled $19.1 million and $10.7 million, respectively.

(7)     Loans Receivable and Allowance for Loan Losses (continued)

    The following table presents interest income recognized for loans individually evaluated for impairment, by loan segment, excluding PCI loans for the years ended December 31, 2020, 2019 and 2018:

	For the Years Ended December 31,
	2020				2019				2018
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(In thousands)
Real estate loans:
One-to-four family	$	7,946	$	305	$	8,811	$	434	$	10,224	$	445
Multifamily and commercial	23,701		1,091		2,639		147		2,712		155
Construction	—		—		850		—		—		—
Commercial business loans	4,963		216		6,378		479		3,060		118
Consumer loans:
Home equity loans and advances	1,909		100		2,562		143		3,361		173
Totals	$	38,519	$	1,712	$	21,240	$	1,203	$	19,357	$	891

    The recorded investment in TDRs totaled $45.4 million at December 31, 2020, of which one loan totaling $91,000 was over 90 days past due, and three loans totaling $11.9 million were 30-59 days past due. The remaining loans modified were current at the time of restructuring and have complied with the terms of their restructure agreement at December 31, 2020. The recorded investment in TDRs totaled $20.0 million at December 31, 2019, of which there were no loans were over 90 days past due and three loans totaling $660,000 were 30-59 days past due. The remaining loans modified were current at the time of restructuring and have complied with the terms of their restructure agreement at December 31, 2019. The recorded investment in TDRs totaled $16.0 million at December 31, 2018, of which one loan totaling $101,000 was over 90 days past due, and seven loans totaling $1.0 million were 30-59 days past due. The remaining loans modified were current at the time of restructuring and have complied with the terms of their restructure agreement at December 31, 2018.

    The following tables present loans receivable by credit quality risk indicator and by loan segment, excluding PCI loans at December 31, 2020 and 2019:

	December 31, 2020
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Pass	$	1,935,032	$	2,758,905	$	328,711	$	740,010	$	320,092	$	1,497	$	6,084,247
Special mention	404		40,392		—		6,718		—		—		47,514
Substandard	4,891		18,668		—		6,142		1,085		—		30,786
Doubtful	—		—		—		—		—		—		—
Total	$	1,940,327	$	2,817,965	$	328,711	$	752,870	$	321,177	$	1,497	$	6,162,547

(7)     Loans Receivable and Allowance for Loan Losses (continued)

	December 31, 2019
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Pass	$	2,072,878	$	2,900,286	$	298,942	$	454,183	$	387,251	$	1,960	$	6,115,500
Special mention	419		4,724		—		20,170		—		—		25,313
Substandard	3,782		14,975		—		8,862		876		—		28,495
Doubtful	—		—		—		—		—		—		—
Total	$	2,077,079	$	2,919,985	$	298,942	$	483,215	$	388,127	$	1,960	$	6,169,308

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Office Properties and Equipment, net

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Office Properties and Equipment, net

Office Properties and Equipment, net

    Office properties and equipment less accumulated depreciation at December 31, 2020 and 2019 are summarized as follows:

	December 31,
	2020		2019
	(In thousands)
Land	$	10,174	$	11,069
Buildings	31,523		27,340
Land and building improvements	35,307		31,520
Leasehold improvements	22,166		24,038
Furniture and equipment	33,971		36,828
	133,141		130,795
Less accumulated depreciation and amortization	57,167		57,828
Total office properties and equipment, net	$	75,974	$	72,967

Land and building improvements at December 31, 2020 and 2019 included $2.6 million and $1.3 million, respectively, in construction in progress for the renovation of the Bank's corporate headquarters and various other facilities. At December 31, 2020 and 2019, $1.9 million and $1.8 million, respectively, included in buildings, are properties classified as held-for-sale, and carried at fair value.

    Depreciation and amortization expense for the years ended December 31, 2020, 2019 and 2018, amounted to $6.5 million, $4.9 million, $3.8 million, respectively.

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Leases

12 Months Ended

Dec. 31, 2020

Leases [Abstract]

Leases

LeasesEffective January 1, 2020, the Company adopted ASU 2016-02 Leases (Topic 842) and all subsequent ASU's that modified Topic 842, as explained in note 2, Summary of Significant Accounting Policies, Accounting Pronouncements Adopted. The Company's leases primarily relate to real estate property for branches and office space. At December 31, 2020, all of the Company's leases are classified as operating leases.

(9)    Leases (continued)

The Company determines if an arrangement is a lease at inception. Topic 842 requires lessees to recognize a right-of-use asset and a lease liability, measured at the present value of the future minimum lease payments, at the lease commencement date. At the time of adoption, an operating lease right-of-use asset of $22.2 million and operating lease liabilities of $23.3 million were recorded in other assets and other liabilities, respectively on our Consolidated Statements of Financial Condition. The calculated amount of the right-of-use asset and lease liabilities are impacted by the length of the lease term and the discount rate used to calculate the present value of minimum lease payments. As the Company's leases do not provide an implicit rate, the discount rate used in determining the lease liability for each individual lease was the Company's incremental borrowing rate at the time of adoption of ASU 2016-02, on a collateralized basis, over a similar term. Certain leases include options to renew, with one or more renewal terms usually ranging from 3 years to 10 years. For each lease, these extension options were evaluated, and those which were considered reasonably certain of renewal were included in the lease term.

At December 31, 2020, the weighted average remaining lease term for operating leases was 7.5 years and the weighted average discount rate used in the measurement of operating lease liabilities was 2.26%.

The Company elected to account for the lease and non-lease components separately since such amounts are readily determinable under the Company's lease contracts. Operating lease expense is recognized on a straight-line basis over the lease term, while variable lease payments are recognized as incurred. Variable lease payments include common area maintenance charges, real estate taxes, repairs and maintenance costs and utilities. Operating and variable lease expenses are recorded in occupancy expense in the Consolidated Statements of Income. During the year ended December 31, 2020, operating and variable lease expenses totaled approximately $2.4 million.

There were no sale and leaseback transactions, leveraged leases or lease transactions with related parties during the year ended December 31, 2020. At December 31, 2020, the Company had no leases that had not yet commenced.

The following table summarizes lease payment obligations for each of the next five years and thereafter as follows:

At December 31, 2020	Lease Payment Obligations
	(In thousands)
2021	$	4,010
2022	3,624
2023	3,310
2024	2,586
2025	1,914
Thereafter	6,620
Total undiscounted cash flows	22,064
Discount on cash flows	(1,992)
Total lease liability	$	20,072

At December 31, 2019, operating lease commitments under lessee arrangements were $4.9 million, $4.5 million, $4.0 million, $3.5 million and $2.7 million for 2020 through 2024, respectively, and $5.0 million in aggregate for all years thereafter.

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Goodwill and Intangible Assets

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Goodwill and Intangible Assets

    Intangible assets at December 31, 2020 and 2019 are summarized as follows:

	December 31,
	2020		2019
	(In thousands)
Goodwill	$	80,285	$	60,763
Core deposit intangibles	6,197		7,245
Mortgage servicing rights	902		574
	$	87,384	$	68,582

    Mortgage servicing rights' amortization expense for the years ended December 31, 2020, 2019, and 2018 amounted to $128,000, $109,000, and $73,000, respectively. Core deposit intangible amortization expense for the years ended December 31, 2020 and 2019 amounted to $1.0 million and $222,000, respectively. There was no core deposit amortization expense for the year ended December 31, 2018.

    Scheduled amortization of core deposit intangibles for each of the next five years and thereafter is as follows:

Year Ending December 31,	Core Deposit Intangible Amortization
	(In thousands)
2021	$	1,024
2022	961
2023	892
2024	819
2025	737
Thereafter	1,764
Total	$	6,197

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Deposits

12 Months Ended

Dec. 31, 2020

Deposits [Abstract]

Deposits

Deposits

    Deposits at December 31, 2020 and 2019 are summarized as follows:

	December 31,
	2020				2019
	Balance		Weighted Average Rate		Balance		Weighted Average Rate
	(Dollars in thousands)
Non-interest-bearing demand	$	1,354,605	—	%	$	958,442	—	%
Interest-bearing demand	2,189,164		0.40		1,720,383		1.03
Money market accounts	588,180		0.36		410,392		0.91
Savings and club deposits	688,309		0.16		543,480		0.15
Certificates of deposit	1,958,366		1.44		2,013,145		2.25
Total deposits	$	6,778,624	0.59	%	$	5,645,842	1.20	%

    Included in the above balances at December 31, 2020 and 2019 are certificates of deposit obtained through brokers, totaling $26.3 million and $31.6 million that were acquired from Stewardship.

    The aggregate amount of certificates of deposit that meet or exceed $100,000 totaled approximately $1.0 billion and $1.1 billion at December 31, 2020 and 2019, respectively.

    Scheduled maturities of certificates of deposit accounts at December 31, 2020 and 2019 are summarized as follows:

	December 31,
	2020		2019
	(In thousands)
One year or less	$	1,494,129	$	1,293,613
After one year to two years	337,579		548,995
After two years to three years	52,809		142,458
After three years to four years	23,018		11,362
After four years	50,831		16,717
	$	1,958,366	$	2,013,145

    Interest expense on deposits for the years ended December 31, 2020, 2019, and 2018 are summarized as follows:

	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Demand (including money market accounts)	$	15,556	$	19,922	$	12,933
Savings and club deposits	1,023		770		993
Certificates of deposit	38,667		40,859		25,597
	$	55,246	$	61,551	$	39,523

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Borrowings

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

Borrowings

Borrowings

    Borrowings at December 31, 2020 and 2019 are summarized as follows:

	December 31,
	2020		2019		2020		2019
	Balance				Weighted Average Interest Rate
	(In thousands)
Overnight lines of credit	$	—	$	107,800	—	%	1.81	%
FHLB advances	792,412		1,275,391		1.18		2.09
Subordinated notes	—		16,899		—		6.75
Junior subordinated debentures	6,952		6,932		3.20		5.09
	$	799,364	$	1,407,022	1.20	%	2.14	%

    At December 31, 2020, the Company had no outstanding overnight lines of credit with the FHLB. At December 31, 2019, the Company had $107.8 million of outstanding lines of credit with the FHLB. Interest expense on the overnight advances for the years ended December 31, 2020, 2019, and 2018, were $425,000, $1.8 million, and $2.2 million, respectively.

    At December 31, 2020, the Bank could borrow funds from the FHLB under an overnight advance program up to the Bank's maximum borrowing capacity based on its ability to collateralize such borrowings. Members in good standing can borrow up to 50% of their asset size as long as they have qualifying collateral to support the advance and purchase of FHLB capital. Additionally, at both December 31, 2020 and 2019, the Bank had unused correspondent bank lines of credit with an aggregate overnight borrowing capacity of $250.0 million.

    At December 31, 2020, FHLB advances were at fixed rates with maturities between January 2021 and February 2025, and at December 31, 2019, FHLB advances were at fixed rates with maturities between January 2020 and August 2024. At December 31, 2020 and 2019, FHLB advances were collateralized by FHLB capital stock owned by the Bank, and loans with carrying values totaling $2.1 billion and $1.9 billion, respectively. Loans securing advances consists of one-to-four family, multifamily and commercial and home equity real estate loans. At December 31, 2020 and 2019, FHLB advances were also collateralized by securities with carrying values totaling $222.4 million and $246.2 million, respectively. Interest expense on fixed rate FHLB advances for the years ended December 31, 2020, 2019, and 2018, were $17.7 million, $25.2 million, and $17.1 million, respectively.

    At December 31, 2020 and 2019, short-term FHLB advances totaling $430.0 million and $410.0 million, respectively, were designated as hedged items as part of a cash flow hedging program. See note 22 for information regarding these transactions.

    Scheduled maturities of FHLB advances at December 31, 2020 are summarized as follows:

	Year Ended December 31,
	2020
	(In thousands)
One year or less	$	496,042
After one year to two years	179,706
After two years to three years	40,391
After three years to four years	51,273
After four years	25,000
Total FHLB advances	$	792,412

(12)    Borrowings (continued)

    At December 31, 2020 and 2019, the carrying value of junior subordinated debt balances were $7.0 million and $6.9 million, respectively. The balance outstanding at December 31, 2020 and 2019 represents debentures issued in 2003 by Stewardship Statutory Trust (the "Trust"), a statutory business trust that was acquired in the Stewardship merger. These floating rate debentures mature on September 17, 2033 and adjust quarterly at a rate of three month LIBOR plus 3.20%. At December 31, 2020 and 2019 the rate of interest was 3.20% and 5.09%, respectively. In August 2018, the Company redeemed all other junior subordinated debt securities that were previously outstanding. Interest expense for the years ended December 31, 2020, 2019, and 2018 were $295,000, $65,000, $3.5 million, respectively.

    At December 31, 2019, the balance of subordinated notes was $16.9 million. At December 31, 2020, the balance was zero as the subordinated notes were prepaid in September 2020. The Company acquired these subordinated notes in the Stewardship merger. The subordinated notes had a maturity date of August 25, 2025, and included a right of prepayment, without penalty, on or after August 28, 2020. Interest expense for the years ended December 31, 2020 and 2019 were $448,000 and $113,000, respectively. There were no subordinated notes outstanding at or during the year ended December 31, 2018.

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Stockholders' Equity

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Stockholders' Equity

Stockholders' Equity

Regulatory Capital

    The Company and its subsidiary Bank are subject to various regulatory capital requirements administered by the federal banking regulators, including a risk-based capital measure. The Federal Reserve establishes capital requirements, including well capitalized standards, for the consolidated financial holding company, and the Office of the Comptroller of the Currency (the "OCC") has similar requirements for the Company's subsidiary bank. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company's Consolidated Statements of Financial Condition.

    Federal regulators require federally insured depository institutions to meet several minimum capital standards: (1) total capital to risk-weighted assets of 8.0%; (2) tier 1 capital to risk-weighted assets of 6.0%; (3) common equity tier 1 capital to risk-weighted assets of 4.5%; and (4) tier 1 capital to adjusted total assets of 4.0%. In addition to establishing the minimum regulatory capital requirements, the regulations limit capital distributions and certain discretionary bonus payments to management if the institution does not hold a "capital conservation buffer" consisting of 2.5% of common equity tier 1 capital to risk-weighted assets above the amount necessary to meet its minimum risk-based capital requirements. The capital conservation buffer capital requirement was fully phased on January 1, 2019. The regulators established a framework for the classification of savings institutions into five categories: well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized, and critically undercapitalized. Generally, an institution is considered well capitalized if it has: a total capital to risk-weighted assets ratio of at least 10.0%, a tier 1 capital to risk-weighted assets ratio of at least 8.0%, a common tier 1 capital to risk-weighted assets ratio of at least 6.5%, and a tier 1 capital to adjusted total assets ratio of at least 5.0%. As of December 31, 2020 and 2019, each of the Company and the Bank exceeded all capital adequacy requirements to which it is subject.

    Based upon most recent notification from federal banking regulators, the Bank was categorized as well capitalized as of June 30, 2020, under the regulatory framework for prompt corrective action. There are no conditions existing or events which have occurred since notification that management believes have changed the Bank's category.

    The following table presents the Company's and the Bank's actual capital amounts and ratios at December 31, 2020 and 2019 compared to the Federal Reserve Bank minimum capital adequacy requirements and the Federal Reserve Bank requirements for classification as a well-capitalized institution:

(13)    Stockholders' Equity (continued)

Regulatory Capital (continued)

	Actual				Minimum Capital Adequacy Requirements				Minimum Capital Adequacy Requirements With Capital Conservation Buffer				To Be Well Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio		Amount		Ratio		Amount		Ratio		Amount		Ratio
Company	(In thousands, except ratio data)
At December 31, 2020:
Total capital (to risk-weighted assets)	$	1,070,361	18.54	%	$	461,766	8.00	%	$	606,068	10.50	%	N/A		N/A
Tier 1 capital (to risk-weighted assets)	998,172		17.29		346,325		6.00		490,627		8.50		N/A		N/A
Common equity tier 1 capital (to risk-weighted assets)	990,955		17.17		259,744		4.50		404,046		7.00		N/A		N/A
Tier 1 capital (to adjusted total assets)	998,172		11.38		350,923		4.00		350,923		4.00		N/A		N/A
At December 31, 2019:
Total capital (to risk-weighted assets)	$	1,061,555	17.25	%	$	492,438	8.00	%	$	646,324	10.50	%	N/A		N/A
Tier 1 capital (to risk-weighted assets)	988,172		16.05		369,328		6.00		523,215		8.50		N/A		N/A
Common equity tier 1 capital (to risk-weighted assets)	980,995		15.94		276,996		4.50		430,883		7.00		N/A		N/A
Tier 1 capital (to adjusted total assets)	988,172		12.92		305,824		4.00		305,824		4.00		N/A		N/A
Bank
At December 31, 2020:
Total capital (to risk-weighted assets)	$	924,959	16.05	%	$	460,944	8.00	%	$	604,989	10.50	%	$	576,180	10.00	%
Tier 1 capital (to risk-weighted assets)	852,897		14.80		345,708		6.00		489,753		8.50		460,944		8.00
Common equity tier 1 capital (to risk-weighted assets)	852,897		14.80		259,281		4.50		403,326		7.00		374,517		6.50
Tier 1 capital (to adjusted total assets)	852,897		9.72		350,815		4.00		350,815		4.00		438,519		5.00
At December 31, 2019:
Total capital (to risk-weighted assets)	$	844,664	14.25	%	$	474,125	8.00	%	$	622,290	10.50	%	$	592,657	10.00	%
Tier 1 capital (to risk-weighted assets)	782,881		13.21		355,594		6.00		503,758		8.50		474,125		8.00
Common equity tier 1 capital (to risk-weighted assets)	782,881		13.21		266,696		4.50		414,860		7.00		385,227		6.50
Tier 1 capital (to adjusted total assets)	782,881		10.25		305,423		4.00		305,423		4.00		381,779		5.00

(13)    Stockholders' Equity (continued)

Stock Repurchase Program

    On June 11, 2019, the Company announced that its Board of Directors authorized the Company's first stock repurchase program since the completion of its minority public offering in April 2018. This program, which commenced on June 13, 2019, authorized the purchase of up to 4,000,000 shares, or approximately 3.5%, of the Company's then issued and outstanding common stock. On December 5, 2019, the Company announced that the Board of Directors had expanded its stock repurchase program to authorize the purchase of an additional 3,000,000 shares of the Company's outstanding common stock in addition to the shares remaining under the repurchase program announced on June 11, 2019. On April 23, 2020, the Company completed the repurchases under these stock repurchase programs. On September 10, 2020, the Company announced that its Board of Directors authorized the Company's second stock repurchase program for the purchase of up to 5,000,000 shares, or approximately 4.3%, of the Company's issued and outstanding common stock, commencing on September 15, 2020.

During the years ended December 31, 2020 and 2019, the Company repurchased 7,587,142 shares at at cost of approximately $108.2 million, or $14.26 per share, and 3,543,800 shares at a cost of approximately $55.3 million, or $15.61 per share, respectively, under these programs. Repurchased shares are held as treasury stock and are available for general corporate purposes. There were no stock repurchase programs in effect at or during the year ended December 31, 2018.

XML

Employee Benefit Plans

12 Months Ended

Dec. 31, 2020

Retirement Benefits [Abstract]

Employee Benefit Plans

Employee Benefit Plans

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan"), Post-retirement Plan, Split-Dollar Life Insurance Plans

    The Company maintains a single employer, tax-qualified defined benefit pension plan (the "Pension Plan") which covers full-time employees that satisfy the Pension Plan's eligibility requirements. The benefits are based on years of service and the employee's average compensation for the highest five consecutive years of employment. Effective October 1, 2018, employees hired by the Bank are not eligible to participate in the Bank's Pension Plan as the plan has been closed to new employees as of that date.

    The Company's policy is to fund at least the minimum contribution required by the Employee Retirement Income Security Act of 1974. GAAP requires an employer to: (a) recognize in its statement of financial position the over-funded or under-funded status of a defined benefit post-retirement plan measured as the difference between the fair value of plan assets and the benefit obligation; (b) measure a plan’s assets and its obligations that determine its funded status at the end of the employer’s fiscal year (with limited exceptions); and (c) recognize as a component of other comprehensive income (loss), net of tax, the actuarial gains and losses and the prior service costs and credits that arise during the period. The assets of the plan are primarily invested in fixed income and equity funds.

    The Company also has a Retirement Income Maintenance Plan (the "RIM" Plan), which is a non-qualified defined benefit plan which provides benefits to all employees of the Company if their benefits under the Pension Plan are limited by Internal Revenue Code 415 and 401(a)(17).    

     In addition, the Company provides certain health care and life insurance benefits to eligible retired employees under a Post-retirement Plan. The Company accrues the cost of retiree health care and other benefits during the employees’ period of active service. Effective January 1, 2019, the Post-retirement Plan has also been closed to new hires. The Company also provides life insurance benefits to eligible employees under an endorsement split-dollar life insurance program.

The Company also provides life insurance benefits to eligible employees under an endorsement split-dollar life insurance program. The Company recognizes a liability for future benefits applicable to endorsement split-dollar life insurance arrangements that provide death benefits post-retirement. Through the mergers with Stewardship and Roselle, the Company recognized an additional liability for future benefits applicable to endorsement split-dollar life insurance arrangements that provide death benefits post-retirement under those respective Bank's program.

The following table sets forth information regarding the Pension, RIM, Post-retirement and Split-Dollar Life Insurance Plans at December 31, 2020 and 2019:

(14)    Employee Benefit Plans (continued)

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, Split-Dollar Life Insurance Plans (cont'd)

	December 31,
	2020		2019		2020		2019		2020		2019		2020		2019
	Pension Plan				RIM Plan				Post-retirement Plan				Split-Dollar Life Insurance
	(In thousands)
Change in benefit obligation:
Benefit obligation at beginning of year	$	263,826	$	209,205	$	13,696	$	11,285	$	24,603	$	20,964	$	14,100	$	10,462
Acquired	—		—		—		—		—		—		1,981		310
Service cost	7,985		6,494		267		210		394		339		467		354
Interest cost	7,608		8,569		405		466		683		826		507		457
Actuarial (gain) loss	40,281		46,001		2,506		2,074		5,506		3,141		3,137		2,649
Benefits paid	(7,260)		(6,443)		(344)		(339)		(565)		(667)		(211)		(132)
Benefit obligation at end of year	312,440		263,826		16,530		13,696		30,621		24,603		19,981		14,100
Change in plan assets:
Fair value of plan assets at beginning of year	356,347		272,974		—		—		—		—		—		—
Actuarial return on plan assets	50,820		54,816		—		—		—		—		—		—
Employer contributions	12,000		35,000		344		339		565		667		211		132
Benefits paid	(7,260)		(6,443)		(344)		(339)		(565)		(667)		(211)		(132)
Fair value of plan assets at end of year	411,907		356,347		—		—		—		—		—		—
Funded status at end of year	$	99,467	$	92,521	$	(16,530)	$	(13,696)	$	(30,621)	$	(24,603)	$	(19,981)	$	(14,100)

    At December 31, 2020 and 2019, the unfunded liability for the RIM Plan and Post-retirement Plan of $16.5 million and $30.6 million, and $13.7 million and $24.6 million, respectively, were included in other liabilities in the Consolidated Statements of Financial Condition, and the over-funded pension benefits associated with the Pension Plan totaling $99.5 million and $92.5 million respectively, were included in other assets in the Consolidated Statements of Financial Condition.

    The components of accumulated other comprehensive income related to the Pension Plan, RIM Plan, and Post-retirement Plan on a pre-tax basis, at December 31, 2020, 2019, and $2018, are summarized in the following table:

	At December 31,
	2020								2019
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance		Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
	(In thousands)
Unrecognized prior service costs	$	—	$	—	$	—	$	405	$	—	$	—	$	—	$	461
Unrecognized net actuarial income	76,686		7,686		12,417		8,741		68,752		5,777		7,221		6,058
Total accumulated other comprehensive income	$	76,686	$	7,686	$	12,417	$	9,146	$	68,752	$	5,777	$	7,221	$	6,519

(14)    Employee Benefit Plans (continued)

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, Split-Dollar Life Insurance Plans (cont'd)

	At December 31
	2018
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
	(In thousands)
Unrecognized prior service costs	$	—	$	—	$	—	$	517
Unrecognized net actuarial income	59,579		3,748		4,226		3,658
Total accumulated other comprehensive income	$	59,579	$	3,748	$	4,226	$	4,175

    Net periodic benefit (income) cost for the Pension Plan, RIM Plan, Post-retirement Plan and Split-dollar Life Insurance plan benefits for the years ended December 31, 2020 and 2019, and 2018, includes the following components:

	For the Year Ended December 31,
	2020
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	7,985	$	267	$	394	$	467	Compensation and employee benefits
Interest cost	7,608		405		683		507		Other non-interest expense
Expected return on plan assets	(23,375)		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		56		Other non-interest expense
Net loss	4,902		397		309		454		Other non-interest expense
Net periodic (income) benefit cost	$	(2,880)	$	1,069	$	1,386	$	1,484

(14)    Employee Benefit Plans (continued)

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, Split-Dollar Life Insurance Plans (cont'd)

	For the Year Ended December 31,
	2019
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	6,494	$	210	$	339	$	354	Compensation and employee benefits
Interest cost	8,569		466		826		457		Other non-interest expense
Expected return on plan assets	(21,058)		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		56		Other non-interest expense
Net loss	3,070		244		147		247		Other non-interest expense
Net periodic (income) benefit cost	$	(2,925)	$	920	$	1,312	$	1,114

	For the Year Ended December 31,
	2018
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	7,805	$	282	$	417	$	374	Compensation and employee benefits
Interest cost	8,489		443		796		428		Other non-interest expense
Expected return on plan assets	(20,794)		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		(106)		32		Other non-interest expense
Net loss	3,117		413		323		506		Other non-interest expense
Net periodic (income) benefit cost	$	(1,383)	$	1,138	$	1,430	$	1,340

    The following table summarizes the impact of retrospective application of ASU 2017-07 to the Consolidated Statements of Income for the year ended December 31, 2018:

	Year Ended December 31, 2018
	(In thousands)
Compensation and employee benefits:
As previously reported	$	69,907
As reported under ASU 2017-07	77,226
Other non-interest expense:
As previously reported	$	12,916
As reported under ASU 2017-07	5,597

(14)    Employee Benefit Plans (continued)

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, Split-Dollar Life Insurance Plans (cont'd)

    The weighted average actuarial assumptions used in the plan determinations at and for the years ended December 31, 2020, 2019, and 2018 were as follows:

	At and For the Years Ended December 31,
	2020
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
Weighted average assumptions used to determine benefit obligation:
Discount rate	2.920	%	2.670	%	2.590	%	3.010	%
Rate of compensation increase	3.750		3.750		N/A		3.750
Weighted average assumptions used to determine net periodic benefit cost:
Discount Rates:
Benefit obligation	3.490	%	3.330	%	3.270	%	3.540	%
Remeasurement rate	2.740		N/A		N/A		N/A
Service cost	3.660		3.460		3.520		3.710
Remeasurement rate	2.970		N/A		N/A		N/A
Interest cost	3.120		3.000		2.850		3.280
Remeasurement rate	2.220		N/A		N/A		N/A
Expected rate of return on plan assets	6.500		N/A		N/A		N/A
Rate of compensation increase	3.500		3.500		N/A		3.500

	At and For the Years Ended December 31,
	2019
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
Weighted average assumptions used to determine benefit obligation:
Discount rate	3.490	%	3.330	%	3.270	%	3.540	%
Rate of compensation increase	3.500		3.500		N/A		3.500
Weighted average assumptions used to determine net periodic benefit cost:
Discount Rates:
Benefit obligation	4.570	%	4.470	%	4.410	%	4.630	%
Remeasurement rate	3.850		N/A		N/A		N/A
Service cost	4.700		4.570		4.600		4.740
Remeasurement rate	4.040		N/A		N/A		N/A
Interest cost	4.250		4.180		4.050		4.390
Remeasurement rate	3.440		N/A		N/A		N/A
Expected rate of return on plan assets	7.000		N/A		N/A		N/A
Rate of compensation increase	3.500		3.500		N/A		3.500

(14)    Employee Benefit Plans (continued)

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, Split-Dollar Life Insurance Plans (cont'd)

	At and For the Years Ended December 31,
	2018
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
Weighted average assumptions used to determine benefit obligation:
Discount rate	4.570	%	4.470	%	4.410	%	4.630	%
Rate of compensation increase	3.500		3.500		N/A		3.500
Weighted average assumptions used to determine net periodic benefit cost:
Discount Rates:
Benefit obligation	3.750	%	4.470	%	3.625	%	3.750	%
Service cost	N/A		4.570		N/A		N/A
Interest cost	N/A		4.180		N/A		N/A
Expected rate of return on plan assets	7.250		N/A		N/A		N/A
Rate of compensation increase	3.500		3.500		N/A		3.500

    The Company provides its actuaries with certain rate assumptions used in measuring the respective benefit obligations. The most significant of these is the discount rate used to calculate the period-end present value of the benefit obligations, and the expense to be included in the following year's financial statements. A lower discount rate will result in a higher benefit obligation and expense, while a higher discount rate will result in a lower benefit obligation and expense. The discount rate assumption was determined based on a cash flow-yield curve model specific to the Company's pension and post-retirement plans.

    The Company compares this rate to certain market indices, such as long-term treasury bonds, or pension liability indices, for reasonableness. The Company's expected return on plan assets assumption is based on historical investment return rate experience and evaluation of input from the trustee managing the pension plan's assets and the Bank's Pension Committee which has responsibility for managing these assets. The expected return on pension plan assets is also impacted by the target allocation of assets, which is based on the Company's goal of earning the highest rate of return while maintaining risk at acceptable levels.

     Assumed health care cost trend rates have a significant effect on the amounts reported for health care plans. A 1% change in the assumed health care cost trend rate would have the following effects on post-retirement benefits at December 31, 2020:

	1% increase		1% decrease
	(In thousands)
Effect on total service cost and interest cost	$	19	$	(16)
Effect on post-retirement benefit obligations	175		(154)

(14)    Employee Benefit Plans (continued)

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, Split-Dollar Life Insurance Plans (cont'd)

Estimated future benefit payments, which reflect expected future service, as appropriate for the next five years and thereafter are as follows:

	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
	(In thousands)
2021	$	8,568	$	384	$	1,490	$	270
2022	9,141		436		1,525		312
2023	9,847		534		1,559		363
2024	10,592		673		1,622		412
2025	11,388		778		1,675		461
2026 - 2030	68,978		4,415		8,820		3,179

    The weighted average asset allocation of pension assets at December 31, 2020 and 2019 were as follows:

	December 31,
	2020		2019
Domestic equities	44.1	%	39.6	%
Foreign equities	13.4	%	9.6	%
Fixed income	37.8	%	44.3	%
Real estate	4.4	%	6.1	%
Cash	0.3	%	0.4	%
Total	100.0	%	100.0	%

    Management, under the direction of the Pension Committee, strives to have pension assets sufficiently diversified so that adverse or unexpected results from one security class will not have a significant detrimental impact on the entire portfolio. The target allocation of assets and acceptable ranges around the targets are as follows:

	Allowable Range
Equities	40-60%
Fixed income	40-60%
Real estate	0-10%
Cash	0-15%

    The Pension Committee engages an investment management advisory firm to regularly monitor the performance of the asset managers and ensure they are within compliance with policy. The maximum and minimum of the range for each class is based on the fair value of the assets in the fund. If changes in fair value should lead to allocations outside these boundaries, management shall adjust exposure back to the established guidelines within 90 days or reevaluate the guidelines.

    The following tables present the assets that are measured at fair value on a recurring basis by level within the U.S. GAAP fair value hierarchy as reported on the Statements of Net Assets Available for Plan Benefits at December 31, 2020 and 2019, respectively. A financial instrument's level within the fair value hierarchy's is based on the lowest level of input that is significant to the fair value measurement.

(14)    Employee Benefit Plans (continued)

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, Split-Dollar Life Insurance Plans (cont'd)

	December 31, 2020
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Money market mutual funds	$	1,434	$	1,434	$	—	$	—
Mutual funds - value stock fund	29,914		29,914		—		—
Mutual funds - fixed income	155,864		155,864		—		—
Mutual funds - international stock	55,300		55,300		—		—
Mutual funds - institutional stock index	151,436		151,436		—		—
Commingled real estate funds	17,959		—		17,959		—
	$	411,907	$	393,948	$	17,959	$	—

	December 31, 2019
			Fair Value Measurements
	Fair value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Money market mutual funds	$	1,462	$	1,462	$	—	$	—
Mutual funds - value stock fund	27,827		27,827		—		—
Mutual funds - fixed income	158,030		158,030		—		—
Mutual funds - international stock	34,332		34,332		—		—
Mutual funds - institutional stock index	113,100		113,100		—		—
Commingled real estate funds	21,596		—		21,596		—
	$	356,347	$	334,751	$	21,596	$	—

    Money market and other mutual funds are reported at fair value in the tables above utilizing exchange quoted prices in active markets for identical instruments (Level 1 inputs). The commingled real estate funds are reported at their respective net asset values (Level 2 inputs).

Bank-owned life insurance ("BOLI")

    The Company has BOLI which is a tax-advantaged transaction that is used to partially fund obligations associated with employee compensation and benefit programs. Policies are purchased insuring officers of the Company using a single premium method of payment. BOLI is accounted for using the cash surrender value and the increase in cash surrender value is included in non-interest income in the Company's Consolidated Statements of Income. At December 31, 2020 and 2019, the Company had $232.8 million and $211.4 million, respectively, in BOLI. BOLI income for the years ended December 31, 2020, 2019, and 2018 was $6.6 million, $5.8 million, and $5.2 million, respectively.

(14)    Employee Benefit Plans (continued)

Savings Income Maintenance Deferred Compensation Plan (the "SIM Plan")

    The Company also maintains a non-qualified defined contribution plan that provides supplemental benefits to certain executives who are prevented from receiving the full benefits contemplated by the 401(k) Plan under tax law limits for tax-qualified plans. The contribution expense for the years ended December 31, 2020, 2019, and 2018 was approximately $4,000, $11,000, and $9,000, respectively.    

401(k) Plan

    The Company has a 401(k) plan covering substantially all employees of the Bank. The Bank may match a percentage of the first 3.00% to 4.50% contributed by participants. The Bank’s matching contribution, if any, is determined by the Board of Directors in its sole discretion. The expense for the years ended December 31, 2020, 2019, and 2018 was approximately $1.7 million, $1.4 million, and $1.3 million,, respectively.

Employee Stock Ownership Plan ("ESOP")

    Effective upon the consummation of the Company's reorganization in April 2018, an ESOP was established for all eligible employees. The ESOP used $45.4 million in proceeds from a twenty year term loan obtained from the Company to purchase 4,542,855 shares of Company common stock. The term loan principal is payable in installments through April 2038. Interest on the term loan is fixed at a rate of 4.75%.

    Each year, the Bank makes discretionary contributions to the ESOP, which are equal to principal and interest payments required on the term loan. Shares purchased with the loan proceeds were initially pledged as collateral for the term loan and is held in a suspense account for future allocation among participants. Contributions to the ESOP and shares released form the suspense account are allocated among the participants on the basis of compensation, as described by the ESOP, in the year of allocation.

    The ESOP shares pledged as collateral are reported as unearned ESOP shares in the Consolidated Statements of Financial Condition. As shares are committed to be released from collateral, the Bank reports compensation expense equal to the average market price of the shares during the year, and the shares become outstanding for basic net income per common share computations. ESOP compensation expense for the years ended December 31, 2020, 2019, and 2018 was $3.2 million, $3.6 million and $2.6 million, respectively.

    The ESOP shares were as follows:

	December 31,
	2020		2019
	(In thousands)
Allocated shares	606		385
Unearned shares	3,929		4,156
Total ESOP shares	4,535		4,541
Fair value of unearned ESOP shares	$	61,139	$	70,409

    The Company has a SERP, which is a non-qualified plan which provides supplemental retirement benefits to eligible officers (those designated by the Board of Directors) of the Company who are prevented from receiving the full benefits contemplated by the ESOP's benefit formulas under tax law limits for tax-qualified plans. SERP compensation expense for the years ended December 31, 2020, 2019, and 2018 was $215,000, $267,000, and $165,000, respectively.

Through the acquisition of Roselle, the Company acquired a non-contributory defined benefit supplemental executive retirement plan with the only participant being the former president of Roselle Bank. For the year ended December 31, 2020, the Company recorded a net periodic benefit cost of $11,000 in connection with this plan.

(14)    Employee Benefit Plans (continued)

Stock Based Deferral Plan and Directors Deferred Compensation Plan

    In addition, the Bank maintains a stock based deferral plan for certain executives and directors, and a cash based deferred compensation plan for directors. The Company records a deferred compensation equity account and corresponding contra-equity account for the cost of the shares held by the Stock Based Deferral Plan. Periodic adjustments to market are not required as participants do not have the option to take the distribution in cash. The Company records a liability for the amount deferred under the Directors Deferred Compensation Plan. There were no expenses recorded under these plans.

Stock Based Compensation

    At the Company's annual meeting held on June 6, 2019, stockholders approved the Columbia Financial, Inc. 2019 Equity Incentive Plan ("2019 Plan") which provides for the issuance of up to 7,949,996 shares (2,271,427 restricted stock awards and 5,678,569 stock options) of common stock.

    On July 23, 2019, 1,389,570 shares of restricted stock were awarded, with a grant date fair value of $15.60 per share. To fund the grant of restricted common stock, the Company issued shares from authorized unissued shares.

    On December 16, 2019, 74,673 shares of restricted stock were awarded, with a grant date fair value of $17.00 per share. To fund the grant of restricted common stock, the Company reissued shares from treasury stock.

On December 14, 2020, 33,160 shares of restricted stock were awarded, with a grant date fair value of $15.08 per share. To fund the grant, the Company reissued shares from treasury stock.

    Restricted shares granted under the 2019 Plan generally vest in equal installments, over the performance or service periods ranging from 1 year to 5 years, beginning 1 year from the date of grant. A portion of restricted shares awarded are performance vesting awards, which may or may not vest depending upon the attainment of certain corporate financial targets. Management recognizes compensation expense for the fair value of restricted shares on a straight line basis over the requisite performance or service period. During the years ended December 31, 2020 and 2019, approximately $5.6 million and $2.3 million, respectively, in expense was recognized in regard to these awards. There was no restricted stock expense recorded for the year ended December 31, 2018. The expected future compensation expense related to the 1,263,169 non-vested restricted shares outstanding at December 31, 2020 is approximately $14.6 million over a weighted average period of 3.0 years.

    The following is a summary of the Company's restricted stock activity during the years ended December 31, 2020 and 2019:

	Number of Restricted Shares	Weighted Average Grant Date Fair Value
Non-vested at January 1, 2019	—	$	—
Grants	1,464,243	15.67
Forfeited	(44,231)	15.60
Non-vested at December 31, 2019	1,420,012	$	15.67
Grants	33,160	15.08
Vested	(172,756)	15.66
Forfeited	(17,247)	16.02
Non-vested at December 31, 2020	1,263,169	$	15.66

(14)    Employee Benefit Plans (continued)

Stock Based Compensation (continued)

On July 23, 2019, options to purchase 3,707,901 shares of Company common stock were awarded with a grant date fair value of $4.25 per option. Stock options granted under the 2019 Plan vest in equal installments over the service period of five years beginning one year from the date of grant. Stock options were granted at an exercise price of $15.60, which represents the fair value of the Company's common stock price on the grant date based on the closing market price, and have an expiration period of 10 years. The fair value of stock options granted was estimated utilizing the Black-Scholes option pricing model using the following assumptions: expected life of 6.5 years, risk-free rate of return of 1.90%, volatility of 22.12%, and a dividend yield of 0.00%.

On December 16, 2019, options to purchase 184,378 shares of Company common stock were awarded with a grant date fair value of $4.59 per option. Stock options granted under the 2019 Plan generally vest in equal installments over the service period of five years beginning one year from the date of grant. Stock options were granted at an exercise price of $17.00, which represents the fair value of the Company's common stock price on the grant date based on the closing market price, and have an expiration period of approximately 10 years. The fair value of stock options granted was estimated utilizing the Black-Scholes option pricing model using the following assumptions: expected life of 6.5 years, risk-free rate of return of 1.79%, volatility of 22.23%, and a dividend yield of 0.00%.

    The expected life of the options represents the period of time that stock options are expected to be outstanding and is estimated using the simplified approach, which assumes that all outstanding options will be exercised at the midpoint of the vesting date and full contractual term. The risk-free rate of return is based on the rates on the grant date of a U.S. Treasury Note with a term equal to the expected option life. Since the Company recently converted to a public Company and does not have sufficient historical price data, the expected volatility is based on the historical daily stock prices of a peer group of similar entities based on factors such as industry, stage of life cycle, size and financial leverage. The Company has not paid any cash dividends on its common stock.

Management recognizes expense for the fair value of these awards on a straight line basis over the requisite service period. During the years ended December 31, 2020 and 2019, approximately $3.2 million and $1.4 million, respectively, in expense was recognized in regard to these awards. There was no stock option expense recorded for the year ended December 31, 2018. The expected future compensation expense related to the 2,965,330 non-vested options outstanding at December 31, 2020 is $11.3 million over a weighted average period of 3.6 years.

The following is a summary of the Company's option activity during the years ended December 31, 2020 and 2019:

	Number of Stock Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding January 1, 2019	—	$	—	—	$	—
Granted	3,892,279	15.60		9.6	—
Forfeited	(108,235)	15.60		—	—
Outstanding, December 31, 2019	3,784,044	$	15.67	9.6	$	4,812,490
Expired	(10,457)	15.98		—	—
Forfeited	(64,959)	15.84		—	—
Outstanding, December 31, 2020	3,708,628	$	15.66	8.6	$	—
Options exercisable at December 31, 2020	743,298	$	15.66	8.5	$	—

    The aggregate intrinsic value in the table above represents the total pre-tax intrinsic value, the difference between the Company's closing stock price on the last trading day of the period and the exercise price, multiplied by the number of in-the-money options.

    There were no stock option exercises during the years ended December 31, 2020, 2019 and 2018.

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Income Taxes

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

    The current and deferred amounts of income tax expense (benefit) for the years ended December 31, 2020, 2019, and 2018 are as follows:

	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Current:
Federal	$	5,072	$	5,933	$	11,284
State	3,844		2,905		5,129
Total current	8,916		8,838		16,413
Deferred:
Federal	9,847		8,275		(4,901)
State	(109)		(748)		(589)
Total deferred	9,738		7,527		(5,490)
Total income tax expense	$	18,654	$	16,365	$	10,923

    The Company reported deferred tax expense (benefit) of $(5.6) million, $(5.5) million, and $1.4 million for the years ended December 31, 2020, 2019, and 2018, respectively, related to the unrealized gains (losses) on securities available for sale, which is reported in accumulated other comprehensive income (loss), net of tax. Additionally, the Company recorded a deferred tax (benefit) expense of $900,000, $779,000, and $(530,000), respectively, related to the reclassification adjustment of actuarial net (loss) gain on employee benefit obligations, which is reported in accumulated other comprehensive income, net of tax. Deferred tax expense for the years ended December 31, 2020 and 2019 also includes $5.4 million and $2.3 million, respectively, recorded as a result of purchase accounting related to the Roselle and Stewardship acquisitions.

    A reconciliation between the amount of reported total income tax expense and the amount computed by multiplying the applicable statutory federal income tax rate of 21% is as follows:

	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Tax expense at applicable statutory rate	$	16,013	$	14,927	$	7,067
Increase (decrease) in taxes resulting from:
State tax, net of federal income tax benefit	2,951		1,704		3,587
ESOP fair market value adjustment	187		272		202
Tax exempt interest income	(11)		(6)		(4)
Income from Bank-owned life insurance	(1,075)		(1,246)		(812)
Dividend received deduction	(9)		(8)		(16)
Non-deductible merger-related expenses	42		222		—
Non-deductible compensation expense	—		398		—
Other, net	556		102		899
Total income tax expense	$	18,654	$	16,365	$	10,923

(15)    Income Taxes (continued)

The net deferred tax asset is included in other assets in the Consolidated Statements of Financial Condition. The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2020 and 2019 are as follows:

	At December 31,
	2020		2019
	(In thousands)
Deferred tax assets:
Allowance for loan losses	$	20,878	$	13,114
Post-retirement benefits	5,928		4,089
Deferred compensation	2,779		2,085
Depreciation	—		1,002
Retirement Income Maintenance plan	2,471		1,725
ESOP	624		301
Stock-based compensation	2,724		788
Reserve for uncollected interest	126		54
Net unrealized losses on debt securities and defined benefit plans	18,511		18,374
Federal and State NOLs	9,719		2,063
Alternative minimum assessment carryforwards	2,156		2,156
Charitable contribution carryforward	6,359		5,981
Purchase accounting	1,024		—
Lease liability	5,609		—
Other items	3,215		332
Gross deferred tax assets	82,123		58,999
Valuation allowance	(3,411)		(7,442)
	78,712		51,557
Deferred tax liabilities:
Pension expense	49,225		33,856
Depreciation	6,118		—
Deferred loan costs	8,555		5,911
Intangible assets	1,597		1,215
Lease right-of-use asset	5,317		—
Other items	716		266
Total gross deferred tax liabilities	71,528		41,248
Net deferred tax asset	$	7,184	$	10,309

    Retained earnings at December 31, 2020 and 2019 includes approximately $21.5 million for which no provision for income tax has been made. This amount represents an allocation of income to bad debt deductions for tax purposes only. Events that would result in taxation of these reserves include the failure to qualify as a bank for tax purposes, distributions in complete or partial liquidation, stock redemptions and excess distributions to stockholders.

    Management believes that not all existing net deductible temporary differences that comprise the net deferred tax asset will reverse during periods in which the Company generates sufficient net taxable income. Accordingly, management has established a valuation allowance. Significant changes in the Company's operations and or economic conditions could affect the benefits of the recognized net deferred tax asset. Based on all available evidence, a valuation allowance was established for the portion of the state tax benefit that is not more likely than not to be realized. At December 31, 2020 and 2019, the Company's valuation allowance totaled $3.4 million and $7.4 million, respectively. Based upon projections of future taxable income and the ability to carryforward net

(15)    Income Taxes (continued)

operating losses indefinitely, management believes it is more likely than not the Company will realize the remaining deferred tax assets.

    The Company had federal net operating losses from the acquisition of Roselle of approximately $11.9 million at December 31, 2020 and approximately $5.8 million from the acquisition of Stewardship of at December 31, 2019. These net operating losses are subject to a $1.1 million annual limitation under Code Section 382 and will not expire, except for approximately $1.0 million that will begin to expire in 2036.

    The Company had New Jersey net operating loss carryforwards of $108.4 million and $99.8 million, respectively, at December 31, 2020 and 2019. If not utilized, these carryforwards will expire periodically through 2039. At both December 31, 2020 and 2019, the Company had approximately $2.2 million of New Jersey AMA Tax Credits. These credits do not expire.

    The Company files income tax returns in the United States federal jurisdiction and in the states of New Jersey, New York and Pennsylvania. At December 31, 2020, the Company is no longer subject to federal income tax examination for the years prior to 2016. Columbia Bank MHC and its subsidiaries' New York returns are currently under audit for the tax years 2016 and 2017. The Company is open for examination by the State of New Jersey for years after 2015 and by the States of Pennsylvania and New York for years after 2016.

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Financial Transactions with Off-Balance-Sheet Risk and Concentrations of Credit Risk

12 Months Ended

Dec. 31, 2020

Commitments and Contingencies Disclosure [Abstract]

Financial Transactions with Off-Balance-Sheet Risk and Concentrations of Credit Risk

Financial Transactions with Off-Balance-Sheet Risk and Concentrations of Credit Risk

    The Company is a party to financial instruments with off-balance-sheet risk in the normal course of business in order to meet the financing needs of its customers. These financial instruments consist of commitments to extend credit and involve, to varying degrees, elements of credit and interest rate risk in excess of the amounts recognized in the Consolidated Statements of Financial Condition.

    At December 31, 2020 and 2019, the following commitments existed which are not reflected in the Consolidated Statements of Financial Condition:

	December 31,
	2020		2019
	(In thousands)
Loan commitments:
Residential real estate	$	149,847	$	91,141
Multifamily and commercial real estate	98,910		95,025
Commercial business	16,842		18,737
Construction	13,335		59,990
Consumer including home equity loans and advances	3,264		5,988
Total loan commitments	$	282,198	$	270,881

    Unused lines of credit consisting of home equity lines, and undisbursed business and construction lines totaled approximately $894.5 million and $910.0 million as of December 31, 2020 and 2019, respectively. Amounts drawn on the unused lines of credit are predominantly assessed interest at rates that fluctuate with the base rate.

    The Company uses the same credit policies and collateral requirements in making commitments and conditional obligations as it does for on-balance-sheet loans. Commitments to extend credit are agreements to lend customers as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since the commitments may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer's creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management's credit evaluation of the borrower.

(16)    Financial Transactions with Off-Balance-Sheet Risk and Concentrations of Credit Risk (continued)

    The Company principally grants residential real estate loans, multifamily and commercial real estate loans, construction loans, commercial business loans, home equity loans and advances and other consumer loans to borrowers primarily throughout New Jersey, New York and Pennsylvania, and to a much lesser extent in a few other east coast states. Its borrowers' abilities to repay their obligations are dependent upon various factors, including the borrowers' income and net worth, cash flows generated by the underlying collateral, if any, or from business operations, value of the underlying collateral and priority of the Company's lien on the

property. These factors are dependent on various economic conditions and circumstances beyond the Company's control, and as a result, the Company is subject to the risk of loss. The Company believes that its lending policies and procedures adequately minimize the potential exposure to such risks and adequate provisions for loan losses are provided for all probable and estimable losses. In the normal course of business, the Company sells residential real estate loans to third parties. These loan sales are subject to customary representations and warranties. In the event that the Company is found to be in breach of these representations and warranties, it may be obligated to repurchase certain of these loans.

    The Company has entered into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. The Company's derivative financial instruments are used to manage differences in the amount, timing, and duration of the Company's known or expected cash receipts and its known or expected cash payments principally related to the Company's borrowings. These derivatives were used to hedge the variability in cash flows associated with certain short-term funding transactions. The fair value of the derivatives as of December 31, 2020 and 2019 was a net liability of $23.0 million and $11.4 million, respectively, net of accrued interest and variation margin posted in accordance with the Chicago Mercantile Exchange.

    In connection with its mortgage banking activities, at December 31, 2020 the Company had no commitments to sell loans, with servicing retained by the Bank. At December 31, 2020, the Company had commitments classified as held-for-sale, to sell the loans without servicing retained by the Bank.

    In addition to the commitments noted above, the Company is party to standby letters of credit which are conditional commitments issued by the Bank to guarantee the performance of a customer to a third party. The guarantees generally extend for a term of up to one year and may be secured or unsecured. Outstanding letters of credit totaled $9.4 million and $8.4 million at December 31, 2020 and 2019, respectively.

    In the normal course of business, there are outstanding various legal proceedings, claims, and contingent liabilities which are not included in the consolidated financial statements. In the opinion of management, the financial position of the Company will not be materially affected by the outcome of such legal proceedings and claims.

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Fair Value Measurements

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

    The Company utilizes fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. The determination of fair values of financial instruments often requires the use of estimates. Where quoted market values in an active market are not readily available, the Company utilizes various valuation techniques to estimate fair value.

    In January 2016, the FASB issued ASU 2016-01- "Financial Instruments". This guidance amended existing guidance to improve accounting standards for financial instruments including clarification and simplification of the accounting and disclosure requirements and the requirement to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes. The Company adopted the guidance effective January 1, 2019, and the fair value of the Company's loan portfolio is now presented using an exit price method.

    Fair value is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. There are three levels of inputs that may be used to measure the fair values:

Level 1: Unadjusted quoted prices for identical assets or liabilities in active markets that the Company has the ability to access on the measurement date.

Level 2: Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These might include quoted prices for similar instruments in markets that are active or not active, or inputs that are observable or can be corroborated by observable market data for substantially the full term of the asset or liability.

Level 3: Prices or valuation techniques that require unobservable inputs that are both significant to the fair value measurement and unobservable (i.e., supported by minimal or no market activity). Valuation techniques include the use of option pricing models, discounted cash flow models and similar techniques.

    A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

    The methods described below were used to measure fair value of financial instruments as reflected in the tables below on a recurring basis as of December 31, 2020 and 2019.

Debt Securities Available for Sale, at Fair Value

    For debt securities available for sale, fair value was estimated using a market approach. The majority of these securities are fixed income instruments that are not quoted on an exchange, but are traded in active markets. Prices for these instruments are obtained through third-party data service providers or dealer market participants with which the Company has historically transacted both purchases and sales of securities. Prices obtained from these sources include market quotations and matrix pricing. Matrix pricing, a Level 2 input, is a mathematical technique used principally to value certain securities to a benchmark or to comparable securities. The Company evaluates the quality of Level 2 matrix pricing through comparison to similar assets with greater liquidity and evaluation of projected cash flows. As the Company is responsible for the determination of fair value, it performs quarterly analysis on the prices received from the pricing service to determine whether the prices are reasonable estimates of fair value. Specifically, the Company compares the prices received from the pricing service to a secondary pricing source. Additionally, the Company compares changes in the reported market values and returns to relevant market indices to assess the reasonableness of the reported prices. The Company’s internal price verification procedures and review of fair value methodology documentation provided by independent pricing services has not historically resulted in an adjustment in the prices obtained from the pricing service. The Company may hold debt instruments issued by the U.S. government and U.S. government-sponsored agencies that are traded in active markets with readily accessible quoted market prices that are considered Level 1 inputs.

(17)    Fair Value Measurements (continued)

Equity Securities, at Fair Value

    The Company holds equity securities that are traded in active markets with readily accessible quoted market prices that are considered Level 1 inputs. A trust preferred security that is not traded in an active market and Federal Home Loan Mortgage Corporation ("FHLMC") and Federal National Mortgage Association ("FNMA") preferred stock, are considered Level 2 instruments. In addition, Level 2 instruments include Atlantic Community Bankers Bank ("ACBB") stock, which is based on redemption at par value and can only be sold to the issuing ACBB or another institution that holds ACBB stock.

Derivatives

    The Company records all derivatives included in other assets and liabilities on the Consolidated Statements of Financial Condition at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting, and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. See note 22 for disclosures related to the accounting treatment for derivatives.

    The fair value of the Company's derivatives is determined using discounted cash flow analysis using observable market-based inputs, which are considered Level 2 inputs.

    The following tables present the assets and liabilities reported on the Consolidated Statements of Financial Condition at their fair values as of December 31, 2020 and 2019, by level within the fair value hierarchy:

	December 31, 2020
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Debt securities available for sale:
U.S. government and agency obligations	$	25,549	$	25,549	$	—	$	—
Mortgage-backed securities and collateralized mortgage obligations	1,200,394		—		1,200,394		—
Municipal obligations	16,862		—		16,862		—
Corporate debt securities	69,477		—		69,477		—
Trust preferred securities	4,670		—		4,670		—
Total debt securities available for sale	1,316,952		25,549		1,291,403		—
Equity securities	5,418		5,072		346		—
Derivative assets	19,425		—		19,425		—
	$	1,341,795	$	30,621	1,311,174		$	—
Derivative liabilities	$	42,384	$	—	$	42,384	$	—

(17)    Fair Value Measurements (continued)

	December 31, 2019
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Debt securities available for sale:
U.S. government and agency obligations	$	42,386	$	42,386	$	—	$	—
Mortgage-backed securities and collateralized mortgage obligations	979,881		—		979,881		—
Municipal obligations	2,284		—		2,284		—
Corporate debt securities	69,180		—		69,180		—
Trust preferred securities	4,605		—		4,605		—
Total debt securities available for sale	1,098,336		42,386		1,055,950		—
Equity securities	2,855		2,587		268		—
Derivative assets	185		—		185		—
	$	1,101,376	$	44,973	$	1,056,403	$	—
Derivative liabilities	$	11,546	$	—	$	11,546	$	—

    There were no Level 3 assets measured at fair value on a recurring basis at December 31, 2020 and 2019.

Assets Measured at Fair Value on a Non-Recurring Basis

    The valuation techniques described below were used to estimate fair value of financial instruments measured on a non-recurring basis as of December 31, 2020 and 2019.

Collateral Dependent Impaired Loans

    Loans which meet certain criteria are evaluated individually for impairment. For loans measured for impairment based on the fair value of the underlying collateral, fair value was estimated using a market approach. The Company measures the fair value of collateral underlying impaired loans primarily through obtaining independent appraisals that rely upon quoted market prices for similar assets in active markets. These appraisals include adjustments, on an individual case-by-case basis, to comparable assets based on the appraisers’ market knowledge and experience, as well as adjustments for estimated costs to sell between 6% and 8%. The Company classifies these loans as Level 3 within the fair value hierarchy.

Mortgage Servicing Rights, Net ("MSR"s")

    Mortgage servicing rights are carried at the lower of cost or estimated fair value. The estimated fair value of MSRs is obtained through an analysis of future cash flows, incorporating assumptions that market participants would use in determining fair value including market discount rates, prepayments speeds, servicing income, servicing costs, default rates and other market driven data, including the market's perception of future interest rate movements. The prepayment speed and the discount rate are considered two of the most significant inputs in the model. A significant degree of judgment is involved in valuing the mortgage servicing rights using Level 3 inputs. The use of different assumptions could have a significant effect on this fair value estimate.

(17)    Fair Value Measurements (continued)

    The following tables present the assets and liabilities reported on the Consolidated Statements of Financial Condition at their fair values on a non-recurring basis at December 31, 2020 and 2019, by level within the fair value hierarchy:

	December 31, 2020
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Mortgage servicing rights	$	1,338	$	—	$	—	$	1,338
	$	1,338	$	—	$	—	$	1,338

	December 31, 2019
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Impaired loans	$	1,063	$	—	$	—	$	1,063
Mortgage servicing rights	681		—		—		681
	$	1,744	$	—	$	—	$	1,744

    The following table presents information for Level 3 assets measured at fair value on a non-recurring basis at December 31, 2020 and 2019:

	December 31, 2020
	Fair Value		Valuation Methodology	Unobservable Inputs	Range of Inputs	Weighted Average
	(Dollars in thousands)
Mortgage servicing rights	$	1,338	Estimated cash flow	Prepayment speeds and discount rates (2)	9.7% - 26.2%	16.7%

	December 31, 2019
	Fair Value		Valuation Methodology	Unobservable Inputs	Range of Inputs	Weighted Average
	(Dollars in thousands)
Impaired loans	$	1,063	Estimated cash flow	Expected value of future cash flows (1)	—%	—%
Mortgage servicing rights	681		Estimated cash flow	Prepayment speeds and discount rates (3)	3.6% - 24.0%	12.7%
(1) Value based on management's estimate of expected future cash flows.
(2) Value of SBA servicing rights based on a discount rate of 10.25%.
(3) Value of SBA servicing rights based on a discount rate of 11.75%.

(17)    Fair Value Measurements (continued)

Other Fair Value Disclosures

    The Company is required to disclose estimated fair value of financial instruments, both assets and liabilities on and off the balance sheet, for which it is practicable to estimate fair value. A description of the valuation methodologies used for those assets and liabilities not recorded at fair value on a recurring or non-recurring basis are set forth below.

Cash and Cash Equivalents

    For cash and due from banks, federal funds sold and short-term investments, the carrying amount approximates fair value due to their nature and short-term maturities.

Debt Securities Held to Maturity

    For debt securities held to maturity, fair value was estimated using a market approach. The majority of the Company’s securities are fixed income instruments that are not quoted on an exchange, but are traded in active markets. Prices for these instruments are obtained through third-party data service providers or dealer market participants with which the Company has historically transacted both purchases and sales of securities. Prices obtained from these sources include market quotations and matrix pricing. Matrix pricing, a Level 2 input, is a mathematical technique used principally to value certain securities to benchmark or to compare securities. The Company evaluates the quality of Level 2 matrix pricing through comparison to similar assets with greater liquidity and evaluation of projected cash flows. As the Company is responsible for the determination of fair value, it performs quarterly analysis on the prices received from the pricing service to determine whether the prices are reasonable estimates of fair value. Specifically, the Company compares the prices received from the pricing service to a secondary pricing source. Additionally, the Company compares changes in the reported market values and returns to relevant market indices to assess the reasonableness of the reported prices. The Company’s internal price verification procedures and review of fair value methodology documentation provided by independent pricing services has not historically resulted in an adjustment in the prices obtained from the pricing service. The Company also holds debt instruments issued by the U.S. government and U.S. government sponsored agencies that are traded in active markets with readily accessible quoted market prices that are considered Level 1 inputs within the fair value hierarchy.

Federal Home Loan Bank Stock ("FHLB")

    The fair value of FHLB stock is based on redemption at par value and can only be sold to the issuing FHLB, to other FHLBs, or to other member banks. As such, the Company's FHLB stock is recorded at cost, or par value, and is evaluated for impairment each reporting period by considering the ultimate recoverability of the investment rather than temporary declines in value. The Company classifies the estimated fair value as Level 2 within the fair value hierarchy.

Loans Receivable

    Fair values are estimated for portfolios of loans with similar financial characteristics. Loans are segregated by type such as commercial mortgage, residential mortgage, commercial, construction, and consumer and other. Each loan category is further segmented into fixed and adjustable rate interest terms and into performing and non-performing categories.

    The fair value of performing loans was estimated using a combination of techniques, including a discounted cash flow model that utilizes a discount rate that reflects the Company's current pricing for loans with similar characteristics and remaining maturity, adjusted by an amount for estimated credit losses inherent in the portfolio at the balance sheet date. The rates take into account the expected yield curve, as well as an adjustment for prepayment risk, when applicable. The Company classifies the estimated fair value of its loan portfolio as Level 3.

    The fair value for significant non-performing loans was based on recent external appraisals of collateral securing such loans, adjusted for the timing of anticipated cash flows. The Company classifies the estimated fair value of its non-performing loan portfolio as Level 3.

Deposits

    The fair value of deposits with no stated maturity, such as demand, money market, and savings and club deposits are payable on demand at each reporting date and classified as Level 2. The estimated fair value of certificates of deposit was based on the discounted value of contractual cash flows. The discount rate was estimated using the Company’s current rates offered for deposits with similar remaining maturities. The Company classifies the estimated fair value of its certificates of deposit portfolio as Level 2.

(17)    Fair Value Measurements (continued)

Borrowings

    The fair value of borrowings was estimated by discounting future cash flows using rates available for debt with similar terms and maturities and is classified by the Company as Level 2 within the fair value hierarchy.

Commitments to Extend Credit and Letters of Credit

    The fair value of commitments to extend credit and letters of credit was estimated using the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the present creditworthiness of the counter-parties. For fixed rate loan commitments, fair value also considers the difference between current levels of interest rates and the committed rates. The fair value estimates of commitments to extend credit and letters of credit are deemed immaterial.

    The following tables present the assets and liabilities reported on the Consolidated Statements of Financial Condition at their fair values as of December 31, 2020 and 2019:

	December 31, 2020
			Fair Value Measurements
	Carrying Value		Total Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Financial assets:
Cash and cash equivalents	$	422,957	$	422,957	$	422,957	$	—	$	—
Debt securities available for sale	1,316,952		1,316,952		25,549		1,291,403		—
Debt securities held to maturity	262,720		277,091		5,001		272,090		—
Equity securities	5,418		5,418		5,072		346
Federal Home Loan Bank stock	43,759		43,759		—		43,759		—
Loans receivable, net	6,107,094		6,394,524		—		—		6,394,524
Derivative assets	19,425		19,425		—		19,425		—
Financial liabilities:
Deposits	$	6,778,624	$	6,793,034	$	—	$	6,793,034	$	—
Borrowings	799,364		808,853		—		808,853		—
Derivative liabilities	42,384		42,384		—		42,384		—

(17)    Fair Value Measurements (continued)

	December 31, 2019
			Fair Value Measurements
	Carrying Value		Total Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Financial assets:
Cash and cash equivalents	$	75,547	$	75,547	$	75,547	$	—	$	—
Debt securities available for sale	1,098,336		1,098,336		42,386		1,055,950		—
Debt securities held to maturity	285,756		289,505		19,960		269,545		—
Equity securities	2,855		2,855		2,587		268		—
Federal Home Loan Bank stock	69,579		69,579		—		69,579		—
Loans receivable, net	6,135,857		6,219,008		—		—		6,219,008
Derivative assets	185		185		—		185		—
Financial liabilities:
Deposits	$	5,645,842	$	5,654,075	$	—	$	5,654,075	$	—
Borrowings	1,407,022		1,411,962		—		1,411,962		—
Derivative liabilities	11,546		11,546		—		11,546		—

Limitations

    Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instrument. These estimates do not reflect any premium or discount that could result from offering for sale at one time the Company’s entire holdings of a particular financial instrument. Because limited markets exist for a significant portion of the Company’s financial instruments, fair value estimates are based on judgments regarding future expected loss experience, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Changes in assumptions could significantly affect the estimates.

    Fair value estimates are based on existing on and off balance sheet financial instruments without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. Other significant assets and liabilities that are not considered financial assets or liabilities include goodwill and intangible assets, deferred tax assets or liabilities, office properties and equipment, and bank-owned life insurance.

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Selected Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2020

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Financial Data (Unaudited)

Selected Quarterly Financial Data (Unaudited)

    The following tables are a condensed summary of certain quarterly results of operations for the years ended December 31, 2020, 2019, and 2018:

	Quarters Ended December 31, 2020
	March 31		June 30		September 30		December 31
	(Dollars in thousands, except per share data)
Total interest income	$	74,690	$	75,587	$	72,933	$	72,501
Total interest expense	23,988		19,716		16,609		13,825
Net interest income	50,702		55,871		56,324		58,676
Provision for credit losses	9,568		5,736		2,516		627
Net interest income after provision for credit losses	41,134		50,135		53,808		58,049
Total non-interest income	6,391		7,008		7,909		9,962
Total non-interest expense	38,508		37,443		41,378		40,810
Income before income tax expense	9,017		19,700		20,339		27,201
Income tax expense	2,252		4,603		5,252		6,547
Net income	$	6,765	$	15,097	$	15,087	$	20,654
Earnings per share - basic and diluted	$	0.06	$	0.14	$	0.14	$	0.19
Weighted average shares outstanding - basic and diluted	108,438,173		111,102,306		110,983,871		108,499,658

	Quarters Ended December 31, 2019
	March 31		June 30		September 30		December 31
	(Dollars in thousands, except per share data)
Total interest income	$	62,887	$	62,732	$	64,438	$	71,026
Total interest expense	20,503		21,889		22,722		23,598
Net interest income	42,384		40,843		41,716		47,428
Provision for loan losses	436		112		1,157		2,519
Net interest income after provision for loan losses	41,948		40,731		40,559		44,909
Total non-interest income	6,037		6,775		10,115		8,709
Total non-interest expense	29,559		31,841		31,064		36,237
Income before income tax expense	18,426		15,665		19,610		17,381
Income tax expense	3,507		3,634		5,392		3,832
Net income	$	14,919	$	12,031	$	14,218	$	13,549
Earnings per share - basic and diluted	$	0.13	$	0.11	$	0.13	$	0.12
Weighted average shares outstanding - basic and diluted	111,536,577		111,553,203		111,371,754		109,958,999

(18)    Selected Quarterly Financial Data (Unaudited) (continued)

	Quarters Ended December 31, 2018
	March 31		June 30		September 30		December 31
	(Dollars in thousands, except per share data)
Total interest income	$	51,791	$	55,019	$	57,695	$	61,785
Total interest expense	12,730		14,004		17,112		18,410
Net interest income	39,061		41,015		40,583		43,375
Provision for loan losses	2,000		2,400		1,500		777
Net interest income after provision for loan losses	37,061		38,615		39,083		42,598
Total non-interest income	4,543		5,450		5,290		6,405
Total non-interest expense	26,015		61,768		26,590		31,013
Income (loss) before income tax expense	15,589		(17,703)		17,783		17,990
Income tax expense (benefit)	3,805		(2,961)		6,956		3,123
Net income (loss)	$	11,784	$	(14,742)	$	10,827	$	14,867
Earnings per share - basic and diluted	N/A		$	(0.13)	$	0.10	$	0.13
Weighted average shares outstanding - basic and diluted	N/A		111,360,278		111,389,951		111,423,361

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Earnings per Share

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Earnings per Share

Earnings per Share

    Basic earnings per share ("EPS") is computed by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the period. For purposes of calculating basic EPS, weighted average common shares outstanding excludes treasury stock, unallocated employee stock ownership plan shares that have not been committed for release and deferred compensation obligations required to be settled in shares of Company stock.

    Diluted EPS is computed using the same method as basic EPS and reflects the potential dilution which could occur if stock options and unvested shares were exercised and converted into common stock. The potentially diluted shares would then be included in the weighted average number of shares outstanding for the period using the treasury stock method.

    The following is a reconciliation of the numerators and denominators of the basic and diluted earnings per share calculations for the years ended December 31, 2020, 2019,and 2018:

	December 31,
	2020		2019		2018
	(In thousands, except share and per share data)
Net income	$	57,603	$	54,717	$	22,736
Shares:
Weighted average shares outstanding - basic	109,755,924		111,101,246		111,395,723
Weighted average dilutive shares outstanding	—		—		—
Weighted average shares outstanding - diluted	109,755,924		111,101,246		111,395,723
Earnings per share:
Basic	$	0.52	$	0.49	$	0.20
Diluted	$	0.52	$	0.49	$	0.20

    For the years ended December 31, 2020 and 2019, the average number of stock options which were anti-dilutive and were not included in the computation of diluted earnings per share, totaled 1,413,818, and 1,111,650, respectively. For the year ended December 31, 2018, the Company did not have any stock options outstanding.

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Parent-only Financial Information

12 Months Ended

Dec. 31, 2020

Condensed Financial Information Disclosure [Abstract]

Parent-only Financial Information

Parent-only Financial Information

    The condensed financial statements of Columbia Financial, Inc. (parent company) are presented below:

Statements of Financial Condition
	December 31,
	2020		2019
	(In thousands)
Assets
Cash and due from banks	$	94,053	$	168,242
Short-term investments	170		127
Total cash and cash equivalents	94,223		168,369
Debt securities available for sale, at fair value	—		1,496
Equity securities, at fair value	1,167		1,282
Investment in subsidiaries	873,629		785,964
Loan receivable from Bank	41,461		42,982
Other assets	9,803		8,431
Total assets	$	1,020,283	$	1,008,524
Liabilities and Stockholders' Equity
Liabilities:
Borrowings	$	6,953	$	23,831
Accrued expenses and other liabilities	2,043		2,176
Total liabilities	8,996		26,007
Stockholders' equity	1,011,287		982,517
Total liabilities and stockholders' equity	$	1,020,283	$	1,008,524

(20)    Parent-only Financial Information (continued)

Statements of Comprehensive Income (Loss)
	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Dividends from subsidiary	$	50,000	$	179,000	$	—
Interest income:
Loans receivable	2,047		2,111		1,513
Debt securities available for sale and equity securities	51		51		123
Interest-earning deposits	1		173		871
Total interest income	52,099		181,335		2,507
Interest expense on borrowings	863		176		3,468
Net interest income (expense)	51,236		181,159		(961)
Equity earnings (loss) in subsidiary	8,027		(123,142)		51,401
Non-interest income:
Gain on securities transactions	2		236		—
Change in fair value of equity securities	(115)		65		—
Other non-interest income	—		139		—
Total non-interest income	(113)		440		—
Non-interest expense:
Charitable contribution to foundation	—		—		34,767
Merger-related expenses	280		1,807		—
Other non-interest expense	1,377		1,955		425
Total non-interest expense	1,657		3,762		35,192
Income before income tax benefit	57,493		54,695		15,248
Income tax benefit	110		22		7,488
Net income	57,603		54,717		22,736
Other comprehensive income (loss)	(890)		3,710		(6,487)
Comprehensive income (loss)	$	56,713	$	58,427	$	16,249

(20)    Parent-only Financial Information (continued)

Statements of Cash Flows
	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Cash flows from operating activities:
Net income	$	57,603	$	54,717	$	22,736
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of debt issuance costs	—		—		890
Amortization of intangible assets	(278)		(71)		—
Gain on securities transactions	(2)		(236)		—
Change in fair value of equity securities	115		(65)		—
Deferred tax expense (benefit)	1,411		1,453		(6,086)
( Increase) decrease in other assets	(2,675)		(2,026)		1,515
(Decrease) increase in accrued expenses and other liabilities	(647)		3,515		(1,498)
Contribution of common stock to Columbia Bank Foundation	—		—		34,767
Equity in undistributed (earnings) loss of subsidiary	(8,027)		123,142		(51,401)
Net cash provided by operating activities	$	47,500	$	180,429	$	923
Cash flows from investing activities:
Capital contribution to subsidiary	$	—	$	—	$	(246,420)
Proceeds from sales of equity securities	—		1,065		—
Proceeds from paydowns/maturities/calls of debt securities available for sale	1,498		500		1,601
Purchases of debt securities available for sale	—		—		(414)
Purchases of equity securities	—		(416)		—
Loan to ESOP	—		—		(45,428)
Repayment of loan receivable from Bank	1,521		1,457		989
Net cash paid in acquisition	—		(135,410)		—
Net cash provided by (used in) investing activities	$	3,019	$	(132,804)	$	(289,672)
Cash flows from financing activities:
Payments of subordinated debt and trust preferred securities	$	(16,600)	$	—	$	(51,547)
Issuance of common stock in initial public offering	—		—		492,428
Purchase of treasury stock	(108,166)		(55,309)		—
Issuance of common stock allocated to restricted stock award grants	—		21,687		—
Restricted stock forfeitures	(199)		(736)		—
Repurchase of shares for taxes	(181)		—		—
Issuance of treasury stock allocated to restricted stock award grants	481		1,269		—
Net cash (used in) provided by financing activities	$	(124,665)	$	(33,089)	$	440,881

(20)    Parent-only Financial Information (continued)

Statements of Cash Flows
	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Net (decrease) increase in cash and cash equivalents	$	(74,146)	$	14,536	$	152,132
Cash and cash equivalents at beginning of year	168,369		153,833		1,701
Cash and cash equivalents at end of period	$	94,223	$	168,369	$	153,833
Acquisition:
Non-cash assets acquired:
Debt securities available for sale	$	—	$	1,998	$	—
Equity securities	—		208		—
Other assets	—		1,492		—
Total non-cash assets acquired	$	—	$	3,698	$	—
Liabilities assumed:
Borrowings	$	—	$	23,901	$	—
Total liabilities assumed	$	—	$	23,901	$	—
Net non-cash liabilities acquired	$	—	$	(20,203)	$	—
Net cash and cash equivalents acquired in acquisitions	$	—	$	884	$	—

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Other Comprehensive Income (Loss)

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Other Comprehensive Income (Loss)

Other Comprehensive Income (Loss)

    The following tables present the components of other comprehensive income (loss), both gross and net of tax, for the years ended December 31, 2020, 2019, and 2018:

	For the Years Ended December 31,
	2020						2019
	Before Tax		Tax Effect		After Tax		Before Tax		Tax Effect		After Tax
	(In thousands)
Components of other comprehensive income (loss):
Unrealized gains on debt securities available for sale:	$	26,876	$	(5,640)	$	21,236	$	26,601	$	(5,534)	$	21,067
Accretion of unrealized gain on debt securities reclassified as held to maturity	160		(34)		126		11		(2)		9
Reclassification adjustment for gains included in net income	370		(81)		289		2,612		(601)		2,011
	27,406		(5,755)		21,651		29,224		(6,137)		23,087
Derivatives:
Unrealized (loss) on swap contracts accounted for as cash flow hedges	(10,605)		2,223		(8,382)		(8,193)		1,725		(6,468)
Employee benefit plans:
Amortization of prior service cost included in net income	(56)		12		(44)		(56)		12		(44)
Reclassification adjustment of actuarial net (loss) included in net income	(4,284)		900		(3,384)		(3,709)		779		(2,930)
Change in funded status of retirement obligations	(13,583)		2,852		(10,731)		(12,576)		2,641		(9,935)
	(17,923)		3,764		(14,159)		(16,341)		3,432		(12,909)
Total other comprehensive (loss) income	$	(1,122)	$	232	$	(890)	$	4,690	$	(980)	$	3,710

(21)    Other Comprehensive Income (Loss) (continued)

	For the Year Ended December 31,
	2018
	Before Tax		Tax Effect		After Tax
	(In thousands)
Components of other comprehensive(loss) income:
Unrealized (losses) on debt securities available for sale:	$	(7,224)	$	1,446	$	(5,778)
Accretion of unrealized (loss) on debt securities reclassified as held to maturity	(13)		—		(13)
Reclassification adjustment for (losses) included in net income	(116)		24		(92)
	(7,353)		1,470		(5,883)
Derivatives:
Unrealized (loss)on swap contracts accounted for as cash flow hedges	(2,825)		595		(2,230)
Employee benefit plans:
Amortization of prior service cost included in net income	(623)		132		(491)
Reclassification adjustment of actuarial net loss included in net income	2,526		(530)		1,996
Change in funded status of retirement obligations	897		(776)		121
	2,800		(1,174)		1,626
Total other comprehensive (loss) income	$	(7,378)	$	891	$	(6,487)

(21)    Other Comprehensive Income (Loss) (continued)

    The following tables present the changes in the components of accumulated other comprehensive income (loss), net of tax, for the years ended December 31, 2020, 2019, and 2018:

	For the Years Ended December 31,
	2020								2019
	Unrealized Gains on Debt Securities Available for Sale		Unrealized (Losses) on Swaps		Employee Benefit Plans		Accumulated Other Comprehensive (Loss)		Unrealized (Losses) Gains on Debt Securities Available for Sale		Unrealized (Losses) on Swaps		Employee Benefit Plans		Accumulated Other Comprehensive (Loss)
	(In thousands)
Balance at beginning of period	$	9,377	$	(8,474)	$	(69,638)	$	(68,735)	$	(13,162)	$	(2,006)	$	(56,729)	$	(71,897)
Effect of the adoption of ASU 2016-01	—						—		(548)		—		—		(548)
Balance at January 1,	$	9,377	$	(8,474)	$	(69,638)	$	(68,735)	$	(13,710)	$	(2,006)	$	(56,729)	$	(72,445)
Current period changes in other comprehensive income (loss)	21,651		(8,382)		(14,159)		(890)		23,087		(6,468)		(12,909)		3,710
Total other comprehensive income (loss)	$	31,028	$	(16,856)	$	(83,797)	$	(69,625)	$	9,377	$	(8,474)	$	(69,638)	$	(68,735)

	For the Year Ended December 31,
	2018
	Unrealized (Losses) on Debt Securities Available for Sale		Unrealized Gains (Losses) on Swaps		Employee Benefit Plans		Accumulated Other Comprehensive (Loss)
	(In thousands)
Balance at beginning of period	$	(7,279)	$	224	$	(58,355)	$	(65,410)
Current period changes in other comprehensive (loss) income	(5,883)		(2,230)		1,626		(6,487)
Total other comprehensive (loss)	$	(13,162)	$	(2,006)	$	(56,729)	$	(71,897)

(21)    Other Comprehensive Income (Loss) (continued)

    The following tables reflect amounts reclassified from accumulated other comprehensive income (loss) in the Consolidated Statements of Income and the affected line item in the statement where net income is presented for the years ended December 31, 2020, 2019, and 2018:

	Accumulated Other Comprehensive (Loss) Income Components
	For the Years Ended December 31,						Affected line items in the Consolidated Statements of Income
	2020		2019		2018
	(In thousands)
Reclassification adjustment for gains (losses) included in net income	$	370	$	2,612	$	(116)	Gain (loss) on securities transactions
Reclassification adjustment of actuarial net (loss) gain included in net income	(4,284)		(3,709)		2,526		Other non-interest expense
Total before tax	(3,914)		(1,097)		2,410
Income (tax) benefit	819		178		(506)
Net of tax	$	(3,095)	$	(919)	$	1,904

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Derivatives and Hedging Activities

12 Months Ended

Dec. 31, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives and Hedging Activities

Derivatives and Hedging Activities

    The Company uses derivative financial instruments as components of its market risk management, principally to manage interest rate risk. Certain derivatives are entered into in connection with transactions with commercial customers. Derivatives are not used for speculative purposes. All derivatives are recognized as either assets or liabilities in the Consolidated Statements of Financial Condition, reported at fair value and presented on a gross basis. Until a derivative is settled, a favorable change in fair value results in an unrealized gain that is recognized as an asset, while an unfavorable change in fair value results in an unrealized loss that is recognized as a liability.

    The Company generally applies hedge accounting to its derivatives used for market risk management purposes. Hedge accounting is permitted only if specific criteria are met, including a requirement that a highly effective relationship exists between the derivative instrument and the hedged item, both at inception of the hedge and on an ongoing basis. Changes in the fair value of effective fair value hedges are recognized in current earnings (with the change in fair value of the hedged asset or liability also recognized in earnings). Changes in the fair value of effective cash flow hedges are recognized in other comprehensive income (loss) until earnings are affected by the variability in cash flows of the designated hedged item. Ineffective portions of hedge results are recognized in current earnings. Changes in the fair value of derivatives for which hedge accounting is not applied are recognized in current earnings.

The Company formally documents at inception all relationships between the derivative instruments and the hedged items, as well as its risk management objectives and strategies for undertaking the hedge transactions. This process includes linking all derivatives that are designated as hedges to specific assets and liabilities, or to specific firm commitments. The Company also formally assesses, both at inception of the hedge and on an ongoing basis, whether the derivatives that are used in hedging transactions are highly effective in offsetting changes in the fair values or cash flows of the hedged items. If it is determined that a derivative is not highly effective or has ceased to be a highly effective hedge, the Company would discontinue hedge accounting prospectively. Gains or losses resulting from the termination of a derivative accounted for as a cash flow hedge remain in other comprehensive income (loss) and is (accreted) amortized to earnings over the remaining period of the former hedging relationship.

Certain derivative financial instruments are offered to certain commercial banking customers to manage their risk of exposure and risk management strategies. These derivative instruments consist primarily of currency forward contracts and interest rate swap contracts. The risks associated with these transactions is mitigated by simultaneously entering into similar transactions having essentially offsetting terms with a third party. In addition, the Company executes interest rate swaps with third parties in order to hedge the interest rate risk of short-term FHLB advances.

    Currency Forward Contracts. At December 31, 2020 and 2019, the Company had no currency forward contracts in place with commercial banking customers.

    Interest Rate Swaps. At December 31, 2020, the Company had interest rate swaps in place with 48 commercial banking customers executed by offsetting interest rate swaps with third parties, with an aggregated notional amount of $175.1 million. At December 31, 2019, the Company had interest rate swaps in place with 22 commercial banking customers executed by offsetting interest rate swaps with third parties, with an aggregated notional amount of $169.9 million. These derivatives are not designated as hedges and are not speculative. These interest rate swaps do not meet hedge accounting requirements.

    At December 31, 2020 and 2019, the Company had 31 and 29 interest rate swaps with notional amounts of $430.0 million and $410.0 million, respectively, hedging certain FHLB advances. These interest rate swaps meet the hedge accounting requirements. Interest rate swaps designated as cash flow hedges involve the receipt of variable amounts from counter-party in exchange for the Company making fixed-rate payments over the life of the agreements without the exchanges of the underlying notional amount.

    For the years ended December 31, 2020, 2019, and 2018, the Company did not record any hedge ineffectiveness associated with these contracts.

(22)    Derivatives and Hedging Activities (continued)

    The tables below present the fair value of the Company’s derivative financial instruments as well as their classification in the Consolidated Statements of Financial Condition at December 31, 2020 and 2019:

	December 31, 2020
	Asset Derivative			Liability Derivative
	Consolidated Statements of Financial Condition	Fair Value		Consolidated Statements of Financial Condition	Fair Value
	(In thousands)
Derivatives:
Interest rate swaps	Other Assets	$	19,425	Other Liabilities	$	42,384
Total derivative instruments		$	19,425		$	42,384
	December 31, 2019
	Asset Derivative			Liability Derivative
	Consolidated Statements of Financial Condition	Fair Value		Consolidated Statements of Financial Condition	Fair Value
	(In thousands)
Derivatives:
Interest rate swaps	Other Assets	$	185	Other Liabilities	$	11,546
Total derivative instruments		$	185		$	11,546

    For the years ended December 31, 2020, 2019, and 2018 losses/(gains) of $306,000, $204,000, and $(52,000) respectively, were recorded for changes in fair value of interest rate swaps with third parties.

    At December 31, 2020 and 2019, accrued interest was $1.0 million and $344,000, respectively.

    The Company has agreements with counterparties that contain a provision that if the Company defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default of its derivative obligations.

    At December 31, 2020, the termination value of derivatives in a net liability position, which includes accrued interest, was $21.9 million. The Company has collateral posting thresholds with certain of its derivative counterparties, and has posted collateral of $41.2 million against its obligations under these agreements.

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Revenue Recognition

12 Months Ended

Dec. 31, 2020

Revenue from Contract with Customer [Abstract]

Revenue Recognition

Revenue Recognition

    On January 1, 2019, the Company adopted ASU 2014-09 Revenue from Contracts with Customers (Topic 606) and all subsequent ASUs that modified Topic 606. The Company performed a review and assessment of all revenue streams, the related contracts with customers, and the underlying performance obligations in those contracts. This guidance does not apply to revenue associated with financial instruments, including interest income on loans and securities, which comprise the majority of the Company's revenue. Revenue-generating activities that are within the scope of Topic 606, are components of non-interest income. These revenue streams can generally be classified as demand deposit account fees, title insurance fees and other fees.

    The Company, using a modified retrospective transition approach, determined that there was no cumulative effect adjustment to retained earnings as a result of adopting the new standard, nor did the standard have a material impact on our consolidated financial statements including the timing or amounts of revenue recognized.    

    The following table presents non-interest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the years ended December 31, 2020, 2019, and 2018.

	For the Years Ended December 31,
	2020		2019		2018
	(In thousands)
Non-interest income
In-scope of Topic 606:
Demand deposit account fees	$	3,633	$	4,478	$	3,987
Title insurance fees	5,034		4,981		4,297
Other non-interest income	6,472		4,844		4,679
Total in-scope non-interest income	15,139		14,303		12,963
Total out-of-scope non-interest income	16,131		17,333		8,725
Total non-interest income	$	31,270	$	31,636	$	21,688

    Demand deposit account fees include monthly maintenance fees and service charges. These fees are generally derived as a result of either transaction-based or serviced-based services. The Company's performance obligation for these services is generally satisfied, and revenue recognized, at the time the transaction is completed or the service rendered. Fees for these services are generally received from the customer either at the time of the transaction or monthly.

    Title insurance fees are generally recognized at the time the transaction closes or when the service is rendered.

    Other non-interest income includes check printing fees, traveler's check fees, gift card fees, branch service fees, overdraft fees, account analysis fees, other deposit related fees, wealth management related fee income which includes annuity fees, brokerage commissions, and asset management fees. Wealth management related fee income represent fees earned from customers as consideration for asset management and investment advisory services provided by a third party. The Company's performance obligation is generally satisfied monthly and the resulting fees are recognized monthly based upon the month-end market value of the assets under management and the applicable fee rate. The Company does not earn performance-based incentives. The Company's performance obligation for these transaction-based services are generally satisfied, and related revenue recognized, at the time the transaction closes or when the service is rendered or a point in time when the service is completed.

     Also included in other fees are debit card and ATM fees which are transaction-based. Debit card revenue is primarily comprised of interchange fees earned when a customer's Company card is processed through a card payment network. ATM fees are largely generated when a Company cardholder uses a non-Company ATM, or a non-Company cardholder uses a Company ATM. The Company's performance obligation for these services is satisfied when the service is rendered. Payment is generally received at time of transaction or monthly.

    Out-of-scope non-interest income primarily consists of income from bank-owned life insurance, loan prepayment and servicing fees, net fees loan level swaps, gains and losses on the sale of loans and securities, and changes in the fair value of equity securities. None of these revenue streams are subject to the requirements of Topic 606.

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Subsequent Events

12 Months Ended

Dec. 31, 2020

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

    The Company has evaluated events subsequent to December 31, 2020 and through the financial statement issuance date of March 1, 2021. The Company has not identified any material subsequent events that would require adjustment or disclosure in the consolidated financial statements.

The COVID-19 pandemic has disrupted and adversely affected the Bank's business and results of operations, and the ultimate impacts of the pandemic on the Bank's business, financial condition and results of operations will depend on future developments and other factors that are highly uncertain and will be impacted by the scope and duration of the pandemic and actions taken by governmental authorities in response to the pandemic.

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Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Principles of Consolidation

Principles of Consolidation

    The accompanying consolidated financial statements include the accounts of Columbia Financial, Inc., its wholly-owned subsidiary, Columbia Bank (the "Bank") and the Bank's wholly-owned subsidiaries, Columbia Investment Services, Inc., 2500 Broadway Corp. 1901 Residential Management Co. LLC, Plaza Financial Services, Inc., First Jersey Title Services, Inc., Real Estate Management Corp. LLC, 1901 Commercial Management Co. LLC, Stewardship Realty LLC, and CSB Realty Corp. (collectively, the “Company”). In consolidation, all intercompany accounts and transactions are eliminated. Certain reclassifications have been made in the consolidated financial statements to conform with current year classifications. During the year ended December 31, 2020, the Company revised the Consolidated Statements of Cash Flows for the years ended December 31, 2019 and 2018. The revision consisted of reclassifying the proceeds from sales of loans held-for-sale from cash flows from operating activities to cash flows from investing activities. The impact of these revisions was a decrease to cash flows from operating activities and an increase to cash flows from investing activities of $101.9 million and $3.6 million for the years ended December 31, 2019 and 2018, respectively. The revisions had no impact on cash and cash equivalents as of December 31, 2019 and 2018.

    The Company also owned 100% of the common stock of Columbia Financial Capital Trust I (the "Trust"). The Trust was used to issue trust preferred securities. In accordance with Accounting Standards Codification ("ASC") Topic 810, Consolidation, the Trust was classified as a variable interest entity and did not satisfy the conditions for consolidation. Accordingly, the Trust was treated as an unconsolidated subsidiary. In August 2018, the Company redeemed, in full $51.5 million of junior subordinated debt securities, which represented 100% of the assets of the Trust.

    The Bank's wholly owned subsidiary, Stewardship Realty, LLC, incorporated as a New Jersey corporation in 2005 was acquired in the Company's merger with Stewardship in November 2019. It is a service corporation originally organized to hold and manage property in Midland Park which was previously occupied by Atlantic Stewardship Bank.

    The Company also owns 100% of the common stock of Stewardship Statutory Trust I, which is a trust incorporated in Delaware which was also acquired in the Company's merger with Stewardship in November 2019. In accordance with ASC Topic 810, Consolidation, this Trust was classified as a variable interest entity and did not satisfy the conditions for consolidation. Accordingly, this Trust, which owns $7.0 million of trust preferred securities, which represents 100% of the assets, is treated as an unconsolidated subsidiary.

Basis of Financial Statement Presentation

Basis of Financial Statement Presentation

    The consolidated financial statements of the Company have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”). In preparing the consolidated financial statements, management is required to make estimates and assumptions about future events. These estimates and the underlying assumptions affect the reported amounts of assets and liabilities and disclosures about contingent assets and liabilities as of the dates of the Consolidated Statements of Financial Condition, and Consolidated Statements of Income for the periods presented. Material estimates that are particularly susceptible to change are the determination of the adequacy of the allowance for credit losses, evaluation of goodwill for impairment, evaluation of other-than-temporary impairment on securities, evaluation of the need for valuation allowances on deferred tax assets, and determination of liabilities related to retirement and other post-retirement benefits, among others. These estimates and assumptions are based on management’s best estimates and judgment. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment, which management believes to be reasonable under the circumstances. Such estimates and assumptions are adjusted when facts and circumstances dictate. Illiquid credit markets, volatile securities markets, and declines in the housing market and the economy generally have combined to increase the uncertainty inherent in such estimates and assumptions. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. Changes in estimates resulting from continuing changes in the economic environment will be reflected in the consolidated financial statements in future periods.

Cash and Cash Equivalents

Cash and Cash Equivalents    Cash and cash equivalents include cash on hand, amounts due from banks and interest-bearing deposits at other financial institutions and short-term investments. The Company is required by the Federal Reserve Bank System to maintain cash reserves equal to a percentage of certain deposits.

Securities

Securities

    Securities are classified as available for sale and held to maturity. Management determines the appropriate classification of securities at the time of purchase. Securities that management has the positive intent and ability to hold to maturity are classified as held to maturity and reported at amortized cost. Securities not classified as held to maturity are classified as available for sale and carried at estimated fair value, with unrealized holding gains or losses, net of taxes, reported as a separate component of accumulated other comprehensive income or loss ("OCI") included in stockholders' equity.

The fair values of these securities are based on market quotations or matrix pricing as discussed in note 17. The Company evaluates securities for other-than-temporary impairment at each reporting period and more frequently when economic or market conditions warrant such evaluation. In this evaluation, if such declines were deemed other-than temporary, management would measure the total credit-related component of the unrealized loss, and recognize that portion of the loss as a charge to current period earnings. The remaining portion of the unrealized loss would be recognized as an adjustment to OCI. The fair value of the securities portfolio is significantly affected by changes in interest rates. In general, as interest rates rise, the fair value of fixed-rate securities decreases and as interest rates fall, the fair value of fixed-rate securities increases. The Company determines if it has the intent to sell securities or if it more likely than not that the Company would be required to sell the securities before the anticipated recovery. If either exists, the decline in value is considered other-than-temporary and would be recognized in current period earnings.

    Premiums and discounts on securities are generally amortized and accreted to income over the contractual lives of the securities using the level-yield method. Premiums on callable securities are amortized to the earliest call date. Dividend and interest income are recognized when earned. Realized gains and losses are recognized when securities are sold or called based on the specific identification method.

    In the ordinary course of business, securities are pledged as collateral in conjunction with the Company’s borrowings, lines of credit, and public funds on deposit.

Federal Home Loan Bank Stock

Federal Home Loan Bank Stock

    The Bank, as a member of the Federal Home Loan Bank of New York (the "FHLB"), is required to hold shares of capital stock of the FHLB based on its activities, primarily its outstanding borrowings. The Bank carries the investment at cost, or par value, which approximates fair value. Cash dividends are reported as income.

Loans Held-for-Sale

Loans Held-for-Sale    Loans held-for-sale consists of loans intended for sale in the secondary market. These loans are carried at the lower of cost or estimated fair value, less costs to sell, as determined on an individual loan basis. Net unrealized losses, if any, are recognized in a valuation allowance through a charge to earnings. Origination fees and costs on loans held-for-sale are deferred and recognized on settlement dates as a component of the gain or loss on sale. Loans held-for-sale are generally sold with loan servicing rights retained by the Bank.

Loans Receivable

Loans Receivable

    Loans receivable are carried at unpaid principal balances adjusted by unamortized premiums and unearned discounts, net deferred origination fees and costs less the allowance for loan losses. The Bank defers loan origination fees and certain direct loan origination costs and accretes such amounts as an adjustment to the yield over the expected lives of the related loans using the level-yield method. Interest income on loans is accrued and credited to income as earned. Premiums and discounts on loans purchased are amortized or accreted as an adjustment to yield over the contractual lives of the related loans using methodologies which approximate the level-yield method.

    A loan is considered delinquent when payment has not been received within 30 days of its contractual due date. Generally, a loan in designated as a non-accrual loan when the payment of interest is 90 days or more in arrears of its contractual due date. When a loan is placed on non-accrual status, any interest accrued but not received is reversed against interest income. Payments received on a non-accrual loan are either applied to the outstanding principal balance or recorded as interest income, depending on an assessment of the ability to collect the loan. Non-accruing loans are returned to accrual status after there has been a sustained period of repayment performance (generally six consecutive months of payment) and both principal and interest are deemed collectible. The Company identifies loans which may need to be charged-off as a loss, by reviewing all delinquent loans, classified loans and other loans that management may have concerns about collectability.

    An impaired loan is defined as a loan for which it is probable, based on current information, that the Bank will not collect all amounts due under the contractual terms of the loan agreement. The Bank considers the population of loans in its impairment analysis to include all multifamily and commercial real estate, construction, and commercial business loans with an outstanding balance greater than $500,000 and not accruing interest, and loans modified in a troubled debt restructuring. The Company also considers residential real estate, and home equity loans and advances that are not accruing or modified in a troubled debt restructuring for impairment. Other loans may be included in the population of loans in its impairment analysis if management has specific information of a collateral shortfall. Loan impairment is measured based on the present value of expected future cash flows discounted at the loan's effective interest rate or, as a practical expedient, at the loan's observable market price or the fair value of the collateral if the loan is collateral dependent. Payments received on impaired loans are recognized on a cash basis.

Purchased Credit-Impaired ("PCI") Loans

Purchased Credit-Impaired ("PCI") Loans

    Purchased credit impaired loans are loans acquired through acquisitions at a discount primarily due to deteriorated credit quality. PCI loans are recorded at fair value at the date of acquisition, based upon the present value of expected future cash flows, with no carryover of the related allowance for credit losses. Determining the fair value of the loans involves projecting the amount and timing of principal and/or interest cash flows expected to be collected on the loans discounting those cash flows at a market rate of interest. The excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable yield and is recognized into interest income over the remaining life of the loan. The difference between contractually required payments at acquisition and the cash flows expected to be collected at acquisition is referred to as the nonaccretable yield. The nonaccretable yield represents estimated future credit losses expected to be incurred over the life of the loan. Subsequent decreases to the expected cash flows require us to evaluate the need for an allowance for credit losses. Subsequent improvements in expected cash flows result in the reversal of a corresponding amount of the nonacretable yield which we then reclassify as accretable yield that is recognized into interest income over the remaining life of the loan using the interest method. The evaluation of the amount of future cash flows that is expected to be collected is performed in a similar manner used to determine the allowance for loan losses. Any charge-offs of principal on acquired loans would first be applied against the nonaccretable yield portion of the fair value adjustment.

Allowance for Loan Losses

Allowance for Loan Losses

    Losses on loans are charged to the allowance for loan losses. Additions to this allowance are made by recoveries of loans previously charged off and by a provision charged to expense. The determination of the balance of the allowance for loan losses is based on an analysis of the loan portfolio, economic conditions, historical loan loss experience and other factors that warrant recognition in providing an adequate allowance. Estimates and judgments required to establish the allowance include: overall economic environment; value of collateral; strength of guarantors; loss exposure in the event of default; the amount and timing of future cash flows on impaired loans; and determination of loss factors applied to the portfolio segments. These estimates are susceptible to significant change. Management regularly reviews loss experience within the portfolio and monitors current economic conditions and other factors related to the collectability of the loan portfolio. While management uses available information, future additions to the allowance may be necessary based on changes in economic conditions in the Bank's market area. In addition, regulatory agencies, as an integral part of their examination process, periodically review the adequacy of the Bank's allowance for loan losses as an integral part of their examination. Such agencies may require the Bank to recognize additions to the allowance or additional write-downs based on their judgments about information available to them at the time of their examination. Although management uses the best information available, the level of the allowance for loan losses remains an estimate that is subject to significant uncertainties.

Troubled Debt Restructuring

Troubled Debt Restructuring

    Troubled debt restructured loans are those loans where the Company has granted a concession it would not otherwise consider because of economic or legal reasons pertaining to a debtor’s financial difficulties. A concession could include a reduced interest rate below a market rate, an extension of the term of the loan, or a combination of the two methods, but generally does not result in the forgiveness of principal or accrued interest. Not all concessions granted by the Company constitute a troubled debt restructuring. Once an obligation has been restructured and designated as a troubled debt restructuring, it continues to be designed as a restructured loan until paid in full. The Company records an impairment charge equal to the difference between the present value of expected future cash flows under the restructured terms discounted at the loan’s original effective interest rate, and the loan’s carrying value. Changes in the calculated impairment due to the passage of time are recorded as an adjustment to the allowance for loan losses.

    Restructured loans that were accruing prior to the restructuring, where income was reasonably assured subsequent to the restructuring, maintain their accrual status. Restructured loans for which collectability was not reasonably assured are placed on non-accrual status, interest accruals cease, and uncollected accrued interest is reversed and charged against current income. Non-accruing restructured loans may be returned to accrual status when there is a sustained period of repayment performance (generally six consecutive months of payments), and both principal and interest are deemed collectible.

In March 2020, various regulatory agencies, including the Board of Governors of the Federal Reserve System and the Federal Deposit Insurance Corporations issued an interagency statement on loan modifications and reporting for financial institutions working with customers affected by COVID-19. The interagency statement was effective immediately and impacted accounting for loan modifications. Section 4013 of the CARES Act, “Temporary Relief from Troubled Debt Restructurings,” allows banks to temporarily suspend certain requirements under GAAP related to TDRs for a limited period of time to account for the effects of COVID-19. The Bank elected to account for modifications on certain loans under Section 4013 of the CARES Act or, if the loan modification was not eligible under Section 4013, used the criteria in the COVID-19 guidance to determine when the loan modification was not a TDR in accordance with ASC 310-40. Guidance noted that modification or deferral programs mandated by the federal or a state government related to COVID-19 would not be in the scope of ASC 310-40, such as a state program that requires all institutions within that state to suspend mortgage payments for a specified period. Furthermore, based on current evaluations, generally, we have continued the accrual of interest on these loans during the short-term modification period. The Consolidated Appropriations Act, 2021, which was enacted in late December 2020, extended certain provisions of the CARES Act, including provisions permitting loan deferral extension requests to not be treated as troubled debt restructurings.

Loans Sold and Serviced

Loans Sold and Serviced

    The Company has entered into Guarantor Swaps with Freddie Mac to improve its liquidity. In these types of transactions, the Company sells mortgage loans in exchange for Freddie Mac Mortgage Participation Certificates backed exclusively by the loans sold. The Company retains the servicing of these loans. The Company also periodically sells loans to investors and continues to service such loans for a fee. Gains or losses on the sale of loans are recorded on trade date using the specific-identification method.

Office Properties and Equipment

Office Properties and Equipment    Land is carried at cost. Office properties, land and building improvements, furniture and equipment, and leasehold improvements are carried at cost, less accumulated depreciation and amortization. Depreciation and amortization of office properties and equipment is computed on a straight-line basis over their estimated useful lives (generally 40 years for buildings, 10 years to 20 years for land and building improvements, 3 years to 10 years for furniture and equipment). Leasehold improvements, carried at cost, net of accumulated depreciation, are amortized over the terms of the related leases or the estimated useful lives of the assets, whichever is shorter. Major improvements are capitalized, while repairs and maintenance costs are charged to expense as incurred. Upon retirement or sale, any gain or loss is recognized as incurred.

Bank-owned Life Insurance

Bank-owned Life Insurance ("BOLI")    Bank-owned life insurance is accounted for using the cash surrender value method and is recorded at its net realizable value. The change in the net asset value is recorded as a component of non-interest income. A deferred liability has been recorded for the estimated cost of post-retirement life insurance benefits accruing to applicable employees and directors covered by an endorsement split-dollar life insurance arrangement.

Goodwill and Intangible Assets

Goodwill and Intangible Assets

    Intangible assets of the Bank consist of goodwill, core deposit intangibles and mortgage servicing rights. Goodwill represents the excess of the purchase price over the fair value of net assets acquired in purchase acquisitions. In accordance with GAAP, goodwill with an indefinite useful life is not amortized, but is evaluated for impairment on an annual basis, or more frequently if events or changes in circumstances indicate potential impairment between annual measurement dates. As permitted by GAAP, the Company prepares a qualitative assessment in determining whether goodwill may be impaired. The factors considered in the assessment include macroeconomic conditions, industry and market conditions and overall financial performance of the Company, among others. The Company completed its annual goodwill impairment test as of December 31, 2020 based upon its qualitative assessment of goodwill and concluded that goodwill was not impaired and no further quantitative analysis was warranted.

    Core deposit intangibles represent the balance of the core deposit intangibles ascribed to the value of deposits acquired by the Bank through the acquisition of Stewardship.

    Mortgage servicing rights are recorded when purchased or when originated mortgage loans are sold, with servicing rights retained. Mortgage servicing rights are amortized on an accelerated method based upon the estimated lives of the related loans, and generally adjusted for prepayments. Mortgage servicing rights are carried at the lower of amortized cost or fair value.

Leases

Leases

The Company determines if an arrangement is a lease at inception. The Company's leases primarily relate to real estate property for branches and office space. All the Company's leases are classified as operating leases and the related right-of-use asset ("ROU") and lease liability are included in other assets and other liabilities, respectively on the Consolidated Statements of Financial Condition.

ROU assets represent the Company’s right to use an underlying asset for the lease term, and lease liabilities represent the Company’s obligation to make lease payments arising from the lease arrangements. The calculated amounts of the ROU asset and lease liabilities are impacted by the length of the lease term and the discount rate used to calculate the present value of minimum lease payments. As the Company's leases do not provide an implicit rate, the discount rate used in determining the lease liability for each individual lease is the Company's incremental borrowing rate. The present value of the lease liability may include the impact of options to extend or terminate the lease when it is reasonably certain that the Company will exercise such options provided in the lease terms. Lease expense is recognized on a straight-line basis over the expected lease term. Lease agreements that include lease and non-lease components, such as common area maintenance charges, are accounted for separately.

Post-retirement Benefits

Post-retirement Benefits

    The Company provides certain health care and life insurance benefits to eligible retired employees under a Post-retirement Plan, along with a split-dollar BOLI death benefit. The Company accrues the cost of retiree health care and other benefits during the employees’ period of active service. Effective January 1, 2019, the Post-retirement plan has been closed to new hires.

    Effective January 1, 2019, the Company implemented ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Post-retirement Benefit Cost. Under this ASU, the FASB requires employers to report the service cost component in the same line item as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net periodic benefit cost are required to be presented in the Consolidated Statements of Income separately from the service cost component. This ASU is also required to be applied retrospectively to all periods presented.

Employee Benefits Plans

Employee Benefit Plans

    The Company maintains a single-employer tax-qualified defined benefit pension plan (the "Pension Plan") which covers full-time employees that satisfy the Pension Plan eligibility requirements. Effective October 1, 2018, employees hired by the Bank are not eligible to participate in the Company's Pension Plan as the plan has been closed to new employees as of that date.

    The Company's policy is to fund at least the minimum contribution required by the Employee Retirement Income Security Act of 1974. GAAP requires an employer to: (a) recognize in its statement of financial position the over-funded or under-funded status of a defined benefit post-retirement plan measured as the difference between the fair value of plan assets and the benefit obligation; (b) measure a plan’s assets and its obligations that determine its funded status at the end of the employer’s fiscal year (with limited exceptions); and (c) recognize as a component of other comprehensive income (loss), net of tax, the actuarial gains and losses and the prior service costs and credits that arise during the period. The assets of the plan are primarily invested in fixed income and equity funds.

    The Company has a retirement income maintenance plan (the "RIM Plan") which is a non-qualified defined benefit plan which provides benefits to all employees of the Company if their benefits under the Pension Plan are limited by the Internal Revenue Code.

    The Company has a 401(k) plan covering substantially all employees of the Company. The Company may match a percentage of the first 3.00% to 4.50% contributed by participants. The Company's matching contribution, if any, is determined by the Board of Directors in its sole discretion.

    The Company has an Employee Stock Ownership Plan ("ESOP"). The funds borrowed by the ESOP from the Company to purchase the Company's common stock are being repaid from the Bank's contributions over a period of 20 years. The Company's common stock not allocated to participants is recorded as a reduction of stockholders' equity at cost. Compensation expense for the ESOP is based on the average price of the Company's stock and the amount of shares committed to be allocated during each period.

    The Company has a Supplemental Executive Retirement Plan ("SERP"). The SERP is a non-qualified plan which provides supplemental retirement benefits to eligible officers (those designated by the Board of Directors) of the Company who are prevented from receiving the full benefits contemplated by the ESOP's benefit formulas under tax law limits for tax-qualified plans. In addition, the Company maintains a stock based deferral plan (the "Stock Based Deferral Plan") for certain executives and directors. The Company records a deferred compensation equity account and corresponding contra-equity account for the cost of the shares held by the Stock Based Deferral and SERP Plans.

    The Company also maintains a non-qualified savings income maintenance deferred compensation plan (the "SIM Plan") that provides supplemental benefits to certain executives who are prevented from receiving the full benefits contemplated by the 401(k) Plan under tax law limits for tax-qualified plans, and a Deferred Compensation Plan for directors.

Derivatives

Derivatives

    The Company uses derivative financial instruments as components of its market risk management, principally to manage interest rate risk. Certain derivatives are entered into in connection with transactions with commercial customers. Derivatives are not used for speculative purposes. All derivatives are recognized as either assets or liabilities in the Consolidated Statements of Financial Condition, reported at fair value and presented on a gross basis. Until a derivative is settled, a favorable change in fair value results in an unrealized gain that is recognized as an asset, while an unfavorable change in fair value results in an unrealized loss that is recognized as a liability.

    The Company generally applies hedge accounting to its derivatives used for market risk management purposes. Hedge accounting is permitted only if specific criteria are met, including a requirement that a highly effective relationship exists between the derivative instrument and the hedged item, both at inception of the hedge and on an ongoing basis. Changes in the fair value of effective fair value hedges are recognized in current earnings (with the change in fair value of the hedged asset or liability also recognized in earnings). Changes in the fair value of effective cash flow hedges are recognized in other comprehensive income (loss) until earnings are affected by the variability in cash flows of the designated hedged item. Ineffective portions of hedge results are recognized in current earnings. Changes in the fair value of derivatives for which hedge accounting is not applied are recognized in current earnings.

The Company formally documents at inception all relationships between the derivative instruments and the hedged items, as well as its risk management objectives and strategies for undertaking the hedge transactions. This process includes linking all derivatives that are designated as hedges to specific assets and liabilities, or to specific firm commitments. The Company also formally assesses, both at inception of the hedge and on an ongoing basis, whether the derivatives that are used in hedging transactions are highly effective in offsetting changes in the fair values or cash flows of the hedged items. If it is determined that a derivative is not highly effective or has ceased to be a highly effective hedge, the Company would discontinue hedge accounting prospectively. Gains or losses resulting from the termination of a derivative accounted for as a cash flow hedge remain in other comprehensive income (loss) and is (accreted) amortized to earnings over the remaining period of the former hedging relationship.

Certain derivative financial instruments are offered to certain commercial banking customers to manage their risk of exposure and risk management strategies. These derivative instruments consist primarily of currency forward contracts and interest rate swap contracts. The risks associated with these transactions is mitigated by simultaneously entering into similar transactions having essentially offsetting terms with a third party. In addition, the Company executes interest rate swaps with third parties in order to hedge the interest rate risk of short-term FHLB advances.

Income Taxes

Income Taxes

    The Company and its subsidiaries file consolidated federal income tax returns. Federal income taxes are allocated to each entity based on their respective contributions to taxable income of the consolidated income tax returns. Beginning in 2019 as required by the State of New Jersey, the Company adopted combined income tax reporting for certain members of a commonly-controlled unitary business group. Prior to 2019, separate state income tax returns were filed for the Company and each of its qualifying subsidiaries.

    The Company records income taxes in accordance with ASC Topic 740, Income Taxes, using the asset and liability method. The amounts reflected on the Company's federal and state income tax returns differ from these provisions due principally to temporary differences in the reporting of certain items for consolidated financial statement reporting and income tax reporting purposes. Accordingly, deferred tax assets and liabilities: (i) are recognized for the expected future tax consequences of events that have been recognized in the financial statements or tax returns; (ii) are attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases; and (iii) are measured using enacted tax rates expected to apply in the years when those temporary differences are expected to be recovered or settled. Where applicable, deferred tax assets are reduced by a valuation allowance for any portions determined not likely to be realized. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income tax expense in the period that includes the enactment date. The valuation allowance is adjusted, by a charge or credit to income tax expense, as changes in facts and circumstances warrant.

    The Company did not have any liabilities for uncertain tax positions or any known unrecognized tax benefits at December 31, 2020 and 2019. The Company recognizes interest and penalties related to unrecognized tax benefits in income tax expense in the Consolidated Statements of Income. The Company did not recognize any interest and penalties during the years ended December 31, 2020, 2019 and 2018.

(2)    Summary of Significant Accounting Policies (continued)

Income Taxes (continued)

On July 1, 2018, New Jersey enacted legislation which adds to the state’s 9.0% Corporation Business Tax rate (i) a 2.5% surtax for periods beginning in 2018 and 2019 and (ii) a 1.5% surtax for periods beginning in 2020 and 2021. Subsequently, on September 12, 2020, New Jersey enacted legislation that restored and extended the 2.5% Corporation Business Tax surcharge to apply retroactively from January 1, 2020 through December 31, 2023. These surtaxes apply to corporations with more than $1.0 million of net income allocated to New Jersey. In addition, for periods beginning in 2019, as previously noted, New Jersey adopted combined income tax reporting for certain members of a commonly-controlled unitary business group, and issued guidance in December 2019 to clarify business entities to be included and excluded from this combined group.

Comprehensive Income (Loss)

Comprehensive Income (Loss)

    Comprehensive income (loss) consists of net income and other comprehensive income (loss). Other comprehensive income (loss) includes items recorded in equity, such as unrealized gains and losses on debt securities available for sale, the noncredit component of other than temporary impairment losses on debt securities, unrealized gains and losses on derivatives, and the unfunded status and reclassification of actuarial net (loss) gain associated with the Company's benefit plans. Comprehensive income is presented in a separate Consolidated Statement of Comprehensive Income (Loss).

Segment Reporting

Segment Reporting

    The Company’s operations are substantially in the financial services industry and include providing traditional banking and other financial services to its customers. The Company operates primarily in New Jersey. Management makes operating decisions and assesses performance based on an ongoing review of the Company’s consolidated financial results. Therefore, the Company has a single operating segment for financial reporting purposes.

Earnings Per Share

Earnings Per Share ("EPS")

    Basic EPS is computed by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the period. For purposes of calculating basic EPS, weighted average common shares outstanding excludes treasury stock, unallocated employee stock ownership plan shares that have not been committed for release and deferred compensation obligations required to be settled in shares of Company stock.

Diluted EPS is computed using the same method as basic EPS and reflects the potential dilution which could occur if stock options and unvested shares were exercised and converted into common stock. The potentially diluted shares would then be included in the weighted average number of shares outstanding for the period using the treasury stock method. Shares issued and reacquired during any period are weighted for the portion of the period that they were outstanding.

Stock Compensation Plans

Stock Compensation Plans

    Compensation expense related to stock options and non-vested restricted stock awards is based on the fair value of the award on the measurement date with expense recognized on a straight line basis over the requisite performance or service period. The fair value of stock options is estimated utilizing the Black-Scholes option pricing model. The fair value of non-vested restricted stock awards is generally the closing market price of the Company's common stock on the date of grant. The Company accounts for forfeitures as they occur.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

    As an “emerging growth company” as defined in Title 1 of the Jumpstart Our Business Startups (JOBS) Act prior to December 31, 2019, the Company elected to use the extended transition period to delay the adoption of new or reissued accounting pronouncements applicable to public companies until such pronouncements were made applicable to private companies.

    Accounting Pronouncements Adopted

In October 2018, the FASB issued ASU No. 2018-16, Derivatives and Hedging (Topic 815)- Inclusion of the Secured Overnight Financing Rate ("SOFR") Overnight Index Swap ("OIS") Rate as a Benchmark Interest Rate for Hedge Accounting Purposes. This ASU permits the use of the OIS rate based upon SOFR as a U.S. benchmark interest rate for hedge accounting

(2)    Summary of Significant Accounting Policies (continued)

Recent Accounting Pronouncements (cont'd)

Accounting Pronouncements Adopted (continued)

purposes under Topic 815 in addition to the direct Treasury obligations of the U.S. Government, the LIBOR swap rate, the OIS rate based on the Fed Funds Effective Rate, and the Securities Industry and Financial Markets Association Municipal Swap Rate.

The amendments in this ASU are required to be adopted concurrently with the amendments in ASU No. 2017-12, Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities, which was issued in August 2017. The effective date for this ASU for the Company is for fiscal years beginning after December 15, 2019, with early adoption, including adoption in an interim period permitted. The amendments should be adopted on a prospective basis for qualifying new or redesignated hedging relationships entered into on or after date of adoption. The Company adopted this guidance effective January 1, 2020. The adoption of this ASU did not have a material impact on the Company's consolidated financial statements.

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement. The purpose of this updated guidance is to improve the effectiveness and disclosures in the notes to the consolidated financial statements. The ASU removes the requirement to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy; removes the policy for timing of transfers between levels; and removes the disclosure related to the valuation process for Level 3 fair value measurements. The ASU also modifies existing disclosure requirements which relate to the disclosure for investments in certain entities which calculate net asset value and clarifies the disclosure about uncertainty in the measurements as of the reporting date. For all entities, the effective date for this guidance is fiscal years beginning after December 15, 2019, including interim periods within the reporting period, with early adoption permitted. Entities are also allowed to elect early adoption of the eliminated or modified disclosure requirements and delay adoption of the new disclosure requirements until their effective date. The Company adopted this guidance effective January 1, 2020. The adoption of this ASU did not have a material impact on the Company's consolidated financial statements.

In March 2017, the FASB issued ASU No. 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities. This guidance shortens the amortization period for premiums on callable debt securities by requiring that premiums be amortized to the first (or earliest) call date instead of as an adjustment to the yield over the contractual life. This change more closely aligns the accounting with the economics of a callable debt security and the amortization period with expectations that already are included in market pricing on callable debt securities. This guidance does not change the accounting for discounts on callable debt securities, which will continue to be amortized to the maturity date. This guidance includes only instruments that are held at a premium and have explicit call features. It does not include instruments that contain prepayment features, such as mortgage backed securities; nor does it include call options that are contingent upon future events or in which the timing or amount to be paid is not fixed. The effective date for this ASU for the Company is fiscal years beginning after December 15, 2019, including interim periods within the reporting period, with early adoption permitted. Transition is

on a modified retrospective basis with an adjustment to retained earnings as of the beginning of the period of adoption. The Company

adopted this guidance effective January 1, 2020. The adoption of this ASU did not have a material impact on the Company's consolidated financial statements.

    In January 2017, the FASB issued ASU No. 2017-04, Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. The main objective of this guidance is to simplify the accounting for goodwill impairment by requiring that impairment charges be based upon the first step in the current two-step impairment test under ASC 350. Currently, if the fair value of a reporting unit is lower than its carrying amount (Step 1), an entity calculates any impairment charge by comparing the implied fair value of goodwill with its carrying amount (Step 2). The implied fair value of goodwill is calculated by deducting the fair value of all assets and liabilities of the reporting unit from the reporting unit’s fair value as determined in Step 1. To determine the implied fair value of goodwill, entities estimate the fair value of any unrecognized intangible assets and any corporate-level assets or liabilities that were included in the determination of the carrying amount and fair value of the reporting unit in Step 1. Under this guidance, if a reporting unit’s carrying amount exceeds its fair value, an entity will record an impairment charge based on that difference. The impairment charge will be limited to the amount of goodwill allocated to that reporting unit. This guidance eliminates the requirement to calculate a goodwill impairment charge using Step 2. This guidance does not change the guidance on completing Step 1 of the goodwill impairment test. Under this guidance, an entity will still be able to perform the current optional qualitative goodwill impairment assessment before determining whether to proceed to Step 1. The guidance in the ASU was applied prospectively and is effective for the Company for annual and interim impairment tests performed in periods beginning after December 15, 2019. The Company adopted this guidance effective January 1, 2020. The adoption of this ASU did not have a material impact on the Company's consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). This guidance requires all lessees to recognize a lease liability and a right-of-use asset, measured at the present value of the future minimum lease payments, at the lease

(2)    Summary of Significant Accounting Policies (continued)

Recent Accounting Pronouncements (cont'd)

Accounting Pronouncements Adopted (continued)

commencement date for leases classified as operating leases as well as finance leases. The update also requires new quantitative disclosures related to leases in the Company's consolidated financial statements. There are also practical expedients in this update related to leases that commenced before the effective date, initial direct costs and the use of hindsight to extend or terminate a lease or purchase a leased asset. Lessor accounting remains largely unchanged under this new guidance. In January 2018, the FASB issued ASU 2018-01, Leases (Topic 842)-Land Easement Practical Expedient for Transition to Topic 842, which provides an optional practical expedient to not evaluate land easements which were existing or expired before the adoption of Topic 842 that were not accounted for as leases under Topic 840. In July 2018, the FASB issued ASU 2018-10, Codification Improvements to Topic 842, Leases and ASU 2018-11, Leases (Topic 842) -Targeted Improvements which provides entities with an optional transition method under which comparative periods presented in the financial statements will continue to be in accordance with current Topic 840, Leases, and a practical expedient to not separate non-lease components from the associated lease component. The guidance is effective for the Company for annual periods beginning after December 15, 2019, including interim periods within that reporting period. In the evaluation of this guidance, the Company identified the inventory of leases and actively accumulated the requisite lease data necessary to apply the guidance. The Company selected a software platform to support the recording, accounting and disclosure requirements of the new lease guidance. Upon adoption, the Company recorded a right-of-use asset and lease liability as of January 1, 2020. See note 9 for more information regarding adoption.

In March 2017, the FASB issued ASU No. 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Post-retirement Benefit Cost, which requires that companies disaggregate the service cost component from other components of net benefit cost. This update calls for companies that offer post-retirement benefits to present the service cost, which is the amount an employer has to set aside each quarter or fiscal year to cover the benefits, in the same line item with other current employee compensation costs. Other components of net benefit cost will be presented in the income statement separately from the service costs component and outside the subtotal of income from operations, if one is presented. The effective date for this ASU for the Company is fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company adopted this guidance effective January 1, 2019. See note 14 for additional disclosure regarding the impact of adoption of this ASU on the Company's consolidated financial statements.

In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, a new standard which addresses diversity in practice related to eight specific cash flow issues: debt prepayment or extinguishment costs, settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies (including bank-owned life insurance policies), distributions received from equity method investees, beneficial interests in securitization transactions and separately identifiable cash flows and application of the predominance principle. This guidance in the ASU is effective for the Company for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Entities will apply the standard’s provisions using a retrospective transition method to each period presented. If it is impracticable to apply the amendments retrospectively for some of the issues, the amendments for those issues would be applied prospectively as of the earliest date practicable. The Company adopted this guidance effective January 1, 2019. The adoption of this ASU did not have a material impact on the Company's consolidated financial statements.

    In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments- Overall: Recognition and Measurement of Financial Assets and Financial Liabilities. This guidance requires an entity to: (i) measure equity investments at fair value through net income, with certain exceptions; (ii) present in other comprehensive income the changes in instrument-specific credit risk for financial

liabilities measured using the fair value option; (iii) present financial assets and financial liabilities by measurement category and form of financial asset; (iv) calculate the fair value of financial instruments for disclosure purposes based on an exit price; and (v) assess a valuation allowance on deferred tax assets related to unrealized losses on available-for-sale debt securities in combination with other deferred tax assets. This guidance provides an election to subsequently measure certain non-marketable equity investments at cost less any impairment and adjusted for certain observable price changes. The guidance also requires a qualitative impairment assessment of such equity investments and amends certain fair value disclosure requirements.

    The Company adopted this guidance effective January 1, 2019. As a result, $1.9 million of equity securities, as of December 31, 2018, were reclassified from securities available for sale, and presented as a separate line item on the Consolidated Statements of Financial Condition. The $548,000 after tax unrealized gain on these securities, at time of adoption, was reclassified from other comprehensive income (loss) to retained earnings, and is reflected in the consolidated statements of changes in stockholders' equity. For financial instruments that are measured at amortized cost, the Company measures fair value utilizing an exit price methodology.

(2)    Summary of Significant Accounting Policies (continued)

Recent Accounting Pronouncements (cont'd)

Accounting Pronouncements Adopted (continued)

See note 17 for additional disclosure regarding the impact of adoption of this ASU on the Company's consolidated financial statements.

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers. The objective of this amendment is to clarify the principles for recognizing revenue and to develop a common revenue standard for U.S. GAAP. This update affects any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of non-

financial assets unless those contracts are in the scope of other standards. The guidance in the ASU was effective for the Company for fiscal years beginning after December 15, 2018. Subsequently, the FASB issued various amendments that were intended to improve and clarify the implementation guidance of ASU No. 2014-09 and had the same effective date as the original guidance. The Company's revenue is primarily comprised of net interest income on interest earning assets and liabilities and non-interest income. The scope of guidance explicitly excludes net interest income as well as other revenues associated with financial assets and liabilities, including loans, leases, securities and derivatives. The Company adopted this guidance effective January 1, 2019, after completing an evaluation of the Company's revenue streams and applicable revenue recognition, and concluded that there are no material changes related to the timing or amount of revenue recognition. The adoption of this guidance did not have a significant impact on the Company's consolidated financial statements, but resulted in additional footnote disclosures, including the disaggregation of certain categories of revenues. See note 23 for additional disclosure regarding the impact of adoption of this ASU on the Company's consolidated financial statements.

Fair Value Measurements

Collateral Dependent Impaired Loans

    Loans which meet certain criteria are evaluated individually for impairment. For loans measured for impairment based on the fair value of the underlying collateral, fair value was estimated using a market approach. The Company measures the fair value of collateral underlying impaired loans primarily through obtaining independent appraisals that rely upon quoted market prices for similar assets in active markets. These appraisals include adjustments, on an individual case-by-case basis, to comparable assets based on the appraisers’ market knowledge and experience, as well as adjustments for estimated costs to sell between 6% and 8%. The Company classifies these loans as Level 3 within the fair value hierarchy.

Mortgage Servicing Rights, Net ("MSR"s")

    Mortgage servicing rights are carried at the lower of cost or estimated fair value. The estimated fair value of MSRs is obtained through an analysis of future cash flows, incorporating assumptions that market participants would use in determining fair value including market discount rates, prepayments speeds, servicing income, servicing costs, default rates and other market driven data, including the market's perception of future interest rate movements. The prepayment speed and the discount rate are considered two of the most significant inputs in the model. A significant degree of judgment is involved in valuing the mortgage servicing rights using Level 3 inputs. The use of different assumptions could have a significant effect on this fair value estimate.

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Acquisitions (Tables)

12 Months Ended

Dec. 31, 2020

Business Combinations [Abstract]

Schedule of recognized identified assets acquired and liabilities assumed

The following table sets forth assets acquired and liabilities assumed in the Stewardship acquisition, at their estimated fair values as of the closing date of the transaction:

	November 1, 2019
Assets acquired:
Cash and cash equivalents	$	105,006
Debt securities available for sale	51,710
Equity securities	1,073
Federal Home Loan Bank stock	3,716
Loans receivable	757,223
Accrued interest receivable	2,239
Office properties and equipment, net	6,815
Bank-owned life insurance	22,096
Deferred tax assets, net	3,534
Core deposit and other intangibles	7,467
Other assets	767
Total assets acquired	$	961,646
Liabilities assumed:
Deposits	$	782,698
Borrowings	82,761
Advance payments by borrowers for taxes and insurance	356
Accrued expenses and other liabilities	14,584
Total liabilities assumed	$	880,399
Net assets acquired	$	81,247
Cash paid for purchase	136,294
Goodwill recorded at merger	$	55,047

The following table sets forth assets acquired and liabilities assumed in the Stewardship acquisition, at their estimated fair values as of the closing date of the transaction:

	April 1, 2020
Assets acquired:
Cash and cash equivalents	$	155,248
Debt securities available for sale	51,479
Debt securities held to maturity	13,418
Equity securities	1,796
Federal Home Loan Bank stock	2,010
Loans receivable	171,593
Accrued interest receivable	679
Office properties and equipment, net	5,774
Bank-owned life insurance	17,245
Deferred tax assets, net	1,334
Other assets	1,489
Total assets acquired	$	422,065
Liabilities assumed:
Deposits	$	333,234
Borrowings	37,728
Advance payments by borrowers for taxes and insurance	982
Accrued expenses and other liabilities	5,400
Total liabilities assumed	$	377,344
Net assets acquired	$	44,721
Fair market value of stock issued to Columbia Bank MHC for purchase	68,530
Goodwill recorded at merger	$	23,809

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Debt Securities Available for Sale (Tables)

12 Months Ended

Dec. 31, 2020

Investments, Debt and Equity Securities [Abstract]

Debt securities, available-for-sale

Debt securities available for sale at December 31, 2020 and 2019 are summarized as follows:

	December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
			(In thousands)
U.S. government and agency obligations	$	24,425	$	1,124	$	—	$	25,549
Mortgage-backed securities and collateralized mortgage obligations	1,163,613		37,343		(562)		1,200,394
Municipal obligations	16,845		17		—		16,862
Corporate debt securities	67,628		2,264		(415)		69,477
Trust preferred securities	5,000		—		(330)		4,670
	$	1,277,511	$	40,748	$	(1,307)	$	1,316,952

	December 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
			(In thousands)
U.S. government and agency obligations	$	42,081	$	321	$	(16)	$	42,386
Mortgage-backed securities and collateralized mortgage obligations	968,165		12,981		(1,265)		979,881
Municipal obligations	2,284		1		(1)		2,284
Corporate debt securities	68,613		945		(378)		69,180
Trust preferred securities	5,000		—		(395)		4,605
	$	1,086,143	$	14,248	$	(2,055)	$	1,098,336

Investments classified by contractual maturity date

The amortized cost and fair value of debt securities available for sale at December 31, 2020, by contractual final maturity, is shown below. Expected maturities may differ from contractual maturities due to prepayment or early call options exercised by the issuer.

(4)     Debt Securities Available for Sale (continued)

	December 31, 2020
	Amortized Cost		Fair Value
	(In thousands)
One year or less	$	21,378	$	21,380
More than one year to five years	47,429		49,276
More than five years to ten years	45,091		45,902
	$	113,898	$	116,558
Mortgage-backed securities and collateralized mortgage obligations	1,163,613		1,200,394
	$	1,277,511	$	1,316,952

Expected maturities may differ from contractual maturities due to prepayment or early call options exercised by the issuer.

	December 31, 2020
	Amortized Cost		Fair Value
	(In thousands)
More than one year to five years	$	5,000	$	5,001
Mortgage-backed securities and collateralized mortgage obligations	257,720		272,090
	$	262,720	$	277,091

Debt securities, available-for-sale, unrealized loss position, fair value

The following tables summarize the fair value and gross unrealized losses of those securities that reported an unrealized loss at December 31, 2020 and 2019 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	December 31, 2020
	Less Than 12 Months				12 Months or Longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
Mortgage-backed securities and collateralized mortgage obligations	$	117,978	$	(481)	$	24,018	$	(81)	$	141,996	$	(562)
Corporate debt securities	9,845		(155)		5,740		(260)		15,585		(415)
Trust preferred securities	—		—		4,670		(330)		4,670		(330)
	$	127,823	$	(636)	$	34,428	$	(671)	$	162,251	$	(1,307)

(4)     Debt Securities Available for Sale (continued)

	December 31, 2019
	Less Than 12 Months				12 Months or Longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
U.S. government and agency obligations	$	5,106	$	(13)	$	4,988	$	(3)	$	10,094	$	(16)
Mortgage-backed securities and collateralized mortgage obligations	178,665		(946)		58,208		(319)		236,873		(1,265)
Municipal obligations	696		(1)		—		—		696		(1)
Corporate debt securities	2,588		(5)		4,627		(373)		7,215		(378)
Trust preferred securities	—		—		4,605		(395)		4,605		(395)
	$	187,055	$	(965)	$	72,428	$	(1,090)	$	259,483	$	(2,055)

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Debt Securities Held to Maturity (Tables)

12 Months Ended

Dec. 31, 2020

Investments, Debt and Equity Securities [Abstract]

Debt securities, held-to-maturity

Debt securities held to maturity at December 31, 2020 and 2019 are summarized as follows:

	December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
	(In thousands)
U.S. government and agency obligations	$	5,000	$	1	$	—	$	5,001
Mortgage-backed securities and collateralized mortgage obligations	257,720		14,372		(2)		272,090
	$	262,720	$	14,373	$	(2)	$	277,091

	December 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
	(In thousands)
U.S. government and agency obligations	$	20,000	$	26	$	(66)	$	19,960
Mortgage-backed securities and collateralized mortgage obligations	265,756		4,048		(259)		269,545
	$	285,756	$	4,074	$	(325)	$	289,505

Investments classified by contractual maturity date

The amortized cost and fair value of debt securities available for sale at December 31, 2020, by contractual final maturity, is shown below. Expected maturities may differ from contractual maturities due to prepayment or early call options exercised by the issuer.

(4)     Debt Securities Available for Sale (continued)

	December 31, 2020
	Amortized Cost		Fair Value
	(In thousands)
One year or less	$	21,378	$	21,380
More than one year to five years	47,429		49,276
More than five years to ten years	45,091		45,902
	$	113,898	$	116,558
Mortgage-backed securities and collateralized mortgage obligations	1,163,613		1,200,394
	$	1,277,511	$	1,316,952

Expected maturities may differ from contractual maturities due to prepayment or early call options exercised by the issuer.

	December 31, 2020
	Amortized Cost		Fair Value
	(In thousands)
More than one year to five years	$	5,000	$	5,001
Mortgage-backed securities and collateralized mortgage obligations	257,720		272,090
	$	262,720	$	277,091

Schedule of unrealized loss on investments

The following tables summarize the fair value and gross unrealized losses of those securities that reported an unrealized loss at December 31, 2020 and 2019 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	December 31, 2020
	Less Than 12 Months				12 Months or Longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
Mortgage-backed securities and collateralized mortgage obligations	$	2,176	$	(2)	$	—	$	—	$	2,176	$	(2)

(5)     Debt Securities Held to Maturity (continued)

	December 31, 2019
	Less than 12 months				12 months or longer				Total
	Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)		Fair Value		Gross Unrealized (Losses)
	(In thousands)
U.S. government and agency obligations	$	9,934	$	(66)	$	—	$	—	$	9,934	$	(66)
Mortgage-backed securities and collateralized mortgage obligations	27,911		(251)		772		(8)		28,683		(259)
	$	37,845	$	(317)	$	772	$	(8)	$	38,617	$	(325)

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Loans Receivable and Allowance for Loan Losses (Tables)

12 Months Ended

Dec. 31, 2020

Receivables [Abstract]

Schedule of loans receivable

Loans receivable at December 31, 2020 and 2019 are summarized as follows:

	December 31,
	2020		2019
	(In thousands)
Real estate loans:
One-to-four family	$	1,940,327	$	2,077,079
Multifamily and commercial	2,817,965		2,919,985
Construction	328,711		298,942
Commercial business loans	752,870		483,215
Consumer loans:
Home equity loans and advances	321,177		388,127
Other consumer loans	1,497		1,960
Total gross loans	6,162,547		6,169,308
Purchased credit-impaired loans	6,345		7,021
Net deferred loan costs, fees and purchased premiums and discounts	12,878		21,237
Loans receivable	$	6,181,770	$	6,197,566

Schedule of aging of loans receivable by portfolio segment

The following tables summarize the aging of loans receivable by portfolio segment, including non-accrual loans and excluding PCI loans at December 31, 2020 and 2019:

	December 31, 2020
	30-59 Days		60-89 Days		90 Days or More		Total Past Due		Non-accrual		Current		Total
	(In thousands)
Real estate loans:
One-to-four family	$	3,068	$	912	$	1,901	$	5,881	$	2,637	$	1,931,809	$	1,940,327
Multifamily and commercial	15,645		—		1,238		16,883		1,873		2,799,209		2,817,965
Construction	550		—		—		550		—		328,161		328,711
Commercial business loans	2,343		1,056		2,453		5,852		2,968		744,050		752,870
Consumer loans:
Home equity loans and advances	1,156		696		394		2,246		678		318,253		321,177
Other consumer loans	4		—		—		4		—		1,493		1,497
Total loans	$	22,766	$	2,664	$	5,986	31,416		$	8,156	$	6,122,975	$	6,162,547

	December 31, 2019
	30-59 Days		60-89 Days		90 Days or More		Total Past Due		Non-accrual		Current		Total
	(In thousands)
Real estate loans:
One-to-four family	$	6,249	$	2,132	$	1,638	$	10,019	$	1,732	$	2,065,328	$	2,077,079
Multifamily and commercial	626		1,210		716		2,552		716		2,916,717		2,919,985
Construction	—		—		—		—		—		298,942		298,942
Commercial business loans	1,056		—		2,489		3,545		3,686		475,984		483,215
Consumer loans:
Home equity loans and advances	1,708		246		405		2,359		553		385,215		388,127
Other consumer loans	3		—		—		3		—		1,957		1,960
Total loans	$	9,642	$	3,588	$	5,248	18,478		$	6,687	$	6,144,143	$	6,169,308

Schedule of PCI loans acquired

The following table presents information regarding the estimates of the contractually required payments, the cash flows expected to be collected, and the estimated fair value of the PCI loans acquired in the Stewardship acquisition as of November 1, 2019 (See note 3 for more details):

	November 1, 2019
	(In thousands)
Contractually required principal and interest	$	9,286
Contractual cash flows not expected to be collected (non-accretable difference)	(1,823)
Expected cash flows to be collected	7,463
Interest component of expected cash flows (accretable yield)	(556)
Fair value of acquired loans	$	6,907

The following table presents information regarding the estimates of the contractually required payments, the cash flows expected to be collected, and the estimated fair value of the PCI loans acquired in the Roselle acquisition as of April 1, 2020 (See note 3 for more details):

	April 1, 2020
	(In thousands)
Contractually required principal and interest	$	461
Contractual cash flows not expected to be collected (non-accretable difference)	(237)
Expected cash flows to be collected	224
Interest component of expected cash flows (accretable yield)	(51)
Fair value of acquired loans	$	173

(7) Loans Receivable and Allowance for Loan Losses (continued)

The following table presents changes in accretable yield for PCI loans for the years ended December 31, 2020 and 2019:

	December 31,
	2020		2019
	(In thousands)
Balance at beginning of period	$	511	$	—
Acquisition	58		556
Accretion	(34)		(30)
Net change in expected cash flows	(117)		(15)
Balance at end of period	$	418	$	511

Schedule of loans receivable by portfolio segment and impairment method

The following tables summarize loans receivable (including PCI loans) and allowance for loan losses by portfolio segment and impairment method at December 31, 2020 and 2019:

	December 31, 2020
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Allowance for loan losses:
Individually evaluated for impairment	$	391	$	601	$	—	$	84	$	12	$	—	$	1,088
Collectively evaluated for impairment	13,195		30,080		11,271		17,300		1,736		6		73,588
Loans acquired with deteriorated credit quality	—		—		—		—		—		—		—
Total	$	13,586	$	30,681	$	11,271	$	17,384	$	1,748	$	6	$	74,676
Total loans:
Individually evaluated for impairment	$	7,257	$	32,792	$	—	$	3,447	$	1,651	$	—	$	45,147
Collectively evaluated for impairment	1,933,070		2,785,173		328,711		749,423		319,526		1,497		6,117,400
Loans acquired with deteriorated credit quality	309		4,893		—		1,143		—		—		6,345
Total loans	$	1,940,636	$	2,822,858	$	328,711	$	754,013	$	321,177	$	1,497	$	6,168,892

(7)     Loans Receivable and Allowance for Loan Losses (continued)

	December 31, 2019
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Allowance for loan losses:
Individually evaluated for impairment	$	484	$	2	$	—	$	1,121	$	14	$	—	$	1,621
Collectively evaluated for impairment	13,296		22,978		7,435		14,715		1,655		9		60,088
Loans acquired with deteriorated credit quality	—		—		—		—		—		—		—
Total	$	13,780	$	22,980	$	7,435	$	15,836	$	1,669	$	9	$	61,709
Total loans:
Individually evaluated for impairment	$	8,891	$	2,599	$	—	$	5,178	$	2,143	$	—	$	18,811
Collectively evaluated for impairment	2,068,188		2,917,386		298,942		478,037		385,984		1,960		6,150,497
Loans acquired with deteriorated credit quality	429		4,866		—		1,726		—		—		7,021
Total loans	$	2,077,508	$	2,924,851	$	298,942	$	484,941	$	388,127	$	1,960	$	6,176,329

The activity in the allowance for loan losses for the years ended December 31, 2020, 2019 and 2018, are as follows:

	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Balance at beginning of period	$	61,709	$	62,342	$	58,178
Provision charged	18,447		4,224		6,677
Recoveries	823		496		707
Charge-offs	(6,303)		(5,353)		(3,220)
Balance at end of period	$	74,676	$	61,709	$	62,342

The activity in the allowance for loan losses by portfolio segment for the years ended December 31, 2020, 2019 and 2018, are as follows:

	For the Year Ended December 31, 2020
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Balance at beginning of period	$	13,780	$	22,980	$	7,435	$	15,836	$	1,669	$	9	$	61,709
Provision charged (credited)	1,299		7,713		3,835		5,360		239		1		18,447
Recoveries	438		16		1		308		60		—		823
Charge-offs	(1,931)		(28)		—		(4,120)		(220)		(4)		(6,303)
Balance at end of period	$	13,586	$	30,681	$	11,271	$	17,384	$	1,748	$	6	$	74,676

	For the Year Ended December 31, 2019
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Balance at beginning of period	$	15,232	$	23,251	$	7,217	$	14,176	$	2,458	$	8	$	62,342
Provision charged (credited)	(429)		(178)		216		5,250		(638)		3		4,224
Recoveries	30		10		2		404		50		—		496
Charge-offs	(1,053)		(103)		—		(3,994)		(201)		(2)		(5,353)
Balance at end of period	$	13,780	$	22,980	$	7,435	$	15,836	$	1,669	$	9	$	61,709

	For the Year Ended December 31, 2018
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Unallocated		Total
	(In thousands)
Balance at beginning of period	$	19,991	$	19,933	$	5,217	$	8,275	$	4,576	$	8	$	178	$	58,178
Provision charged (credited)	(4,503)		3,445		1,997		7,860		(1,949)		5		(178)		6,677
Recoveries	334		2		3		240		122		6		—		707
Charge-offs	(590)		(129)		—		(2,199)		(291)		(11)		—		(3,220)
Balance at end of period	$	15,232	$	23,251	$	7,217	$	14,176	$	2,458	$	8	$	—	$	62,342

Schedule of troubled debt restructuring

The following tables present the number of loans modified as TDRs during the years ended December 31, 2020, 2019 and 2018, along with their balances immediately prior to the modification date and post-modification. Post-modification recorded investment represents the net book balance immediately following modification.

(7)     Loans Receivable and Allowance for Loan Losses (continued)

	For the Years Ended December 31,
	2020					2019
	No. of Loans	Pre-modification Recorded Investment		Post-modification Recorded Investment		No. of Loans	Pre-modification Recorded Investment		Post-modification Recorded Investment
	(Dollars in thousands)
Troubled Debt Restructurings
Real estate loans:
Multifamily and commercial	5	$	17,022	$	17,022	—	$	—	$	—
Commercial business loans	2	11,507		12,802		1	4,095		4,095
Total restructured loans	7	$	28,529	$	29,824	1	$	4,095	$	4,095

	For the Year Ended December 31,
	2018
	No. of Loans	Pre-modification Recorded Investment		Post-modification Recorded Investment
		(Dollars in thousands)
Troubled Debt Restructurings
Real estate loans:
One-to-four family	5	$	801	$	801
Multifamily and commercial	1	65		65
Consumer loans:
Home equity loans and advances	1	588		588
Total restructured loans	7	$	1,454	$	1,454

Schedule of loans individually evaluated for impairment

The following tables present loans individually evaluated for impairment by loan segment, excluding PCI loans, at December 31, 2020 and 2019:

	At December 31, 2020
	Recorded Investment		Unpaid Principal Balance		Specific Allowance
	(In thousands)
With no allowance recorded:
Real estate loans:
One-to-four family	$	3,344	$	3,898	$	—
Multifamily and commercial	13,058		13,094		—
Commercial business loans	1,945		1,945		—
Consumer loans:
Home equity loans and advances	714		851		—
	19,061		19,788		—
With a specific allowance recorded:
Real estate loans:
One-to-four family	3,913		3,919		391
Multifamily and commercial	19,734		20,350		601
Commercial business loans	1,502		1,502		84
Consumer loans:
Home equity loans and advances	937		937		12
	26,086		26,708		1,088
Total:
Real estate loans:
One-to-four family	7,257		7,817		391
Multifamily and commercial	32,792		33,444		601
Commercial business loans	3,447		3,447		84
Consumer loans:
Home equity loans and advances	1,651		1,788		12
Total loans	$	45,147	$	46,496	$	1,088

	At December 31, 2019
	Recorded Investment		Unpaid Principal Balance		Specific Allowance
	(In thousands)
With no allowance recorded:
Real estate loans:
One-to-four family	$	4,314	$	5,473	$	—
Multifamily and commercial	1,494		2,191		—
Commercial business loans	3,859		4,048		—
Consumer loans:
Home equity loans and advances	1,080		1,217		—
	10,747		12,929		—
With a specific allowance recorded:
Real estate loans:
One-to-four family	4,577		4,613		484
Multifamily and commercial	1,105		1,105		2
Commercial business loans	1,319		4,307		1,121
Consumer loans:
Home equity loans and advances	1,063		1,063		14
	8,064		11,088		1,621
Total:
Real estate loans:
One-to-four family	8,891		10,086		484
Multifamily and commercial	2,599		3,296		2
Commercial business loans	5,178		8,355		1,121
Consumer loans:
Home equity loans and advances	2,143		2,280		14
Total loans	$	18,811	$	24,017	$	1,621

The following table presents interest income recognized for loans individually evaluated for impairment, by loan segment, excluding PCI loans for the years ended December 31, 2020, 2019 and 2018:

	For the Years Ended December 31,
	2020				2019				2018
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(In thousands)
Real estate loans:
One-to-four family	$	7,946	$	305	$	8,811	$	434	$	10,224	$	445
Multifamily and commercial	23,701		1,091		2,639		147		2,712		155
Construction	—		—		850		—		—		—
Commercial business loans	4,963		216		6,378		479		3,060		118
Consumer loans:
Home equity loans and advances	1,909		100		2,562		143		3,361		173
Totals	$	38,519	$	1,712	$	21,240	$	1,203	$	19,357	$	891

Schedule of loans receivable by credit quality risk

The following tables present loans receivable by credit quality risk indicator and by loan segment, excluding PCI loans at December 31, 2020 and 2019:

	December 31, 2020
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Pass	$	1,935,032	$	2,758,905	$	328,711	$	740,010	$	320,092	$	1,497	$	6,084,247
Special mention	404		40,392		—		6,718		—		—		47,514
Substandard	4,891		18,668		—		6,142		1,085		—		30,786
Doubtful	—		—		—		—		—		—		—
Total	$	1,940,327	$	2,817,965	$	328,711	$	752,870	$	321,177	$	1,497	$	6,162,547

(7)     Loans Receivable and Allowance for Loan Losses (continued)

	December 31, 2019
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Pass	$	2,072,878	$	2,900,286	$	298,942	$	454,183	$	387,251	$	1,960	$	6,115,500
Special mention	419		4,724		—		20,170		—		—		25,313
Substandard	3,782		14,975		—		8,862		876		—		28,495
Doubtful	—		—		—		—		—		—		—
Total	$	2,077,079	$	2,919,985	$	298,942	$	483,215	$	388,127	$	1,960	$	6,169,308

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Office Properties and Equipment, net (Tables)

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Schedule of Office Properties and Equipment

Office properties and equipment less accumulated depreciation at December 31, 2020 and 2019 are summarized as follows:

	December 31,
	2020		2019
	(In thousands)
Land	$	10,174	$	11,069
Buildings	31,523		27,340
Land and building improvements	35,307		31,520
Leasehold improvements	22,166		24,038
Furniture and equipment	33,971		36,828
	133,141		130,795
Less accumulated depreciation and amortization	57,167		57,828
Total office properties and equipment, net	$	75,974	$	72,967

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Leases (Tables)

12 Months Ended

Dec. 31, 2020

Leases [Abstract]

Lessee, Operating Lease, Liability, Maturity

The following table summarizes lease payment obligations for each of the next five years and thereafter as follows:

At December 31, 2020	Lease Payment Obligations
	(In thousands)
2021	$	4,010
2022	3,624
2023	3,310
2024	2,586
2025	1,914
Thereafter	6,620
Total undiscounted cash flows	22,064
Discount on cash flows	(1,992)
Total lease liability	$	20,072

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Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill and Intangible Assets

Intangible assets at December 31, 2020 and 2019 are summarized as follows:

	December 31,
	2020		2019
	(In thousands)
Goodwill	$	80,285	$	60,763
Core deposit intangibles	6,197		7,245
Mortgage servicing rights	902		574
	$	87,384	$	68,582

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

Scheduled amortization of core deposit intangibles for each of the next five years and thereafter is as follows:

Year Ending December 31,	Core Deposit Intangible Amortization
	(In thousands)
2021	$	1,024
2022	961
2023	892
2024	819
2025	737
Thereafter	1,764
Total	$	6,197

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Deposits (Tables)

12 Months Ended

Dec. 31, 2020

Deposits [Abstract]

Schedule of Deposits

Deposits at December 31, 2020 and 2019 are summarized as follows:

	December 31,
	2020				2019
	Balance		Weighted Average Rate		Balance		Weighted Average Rate
	(Dollars in thousands)
Non-interest-bearing demand	$	1,354,605	—	%	$	958,442	—	%
Interest-bearing demand	2,189,164		0.40		1,720,383		1.03
Money market accounts	588,180		0.36		410,392		0.91
Savings and club deposits	688,309		0.16		543,480		0.15
Certificates of deposit	1,958,366		1.44		2,013,145		2.25
Total deposits	$	6,778,624	0.59	%	$	5,645,842	1.20	%

Schedule of Certificate Accounts by Maturity

Scheduled maturities of certificates of deposit accounts at December 31, 2020 and 2019 are summarized as follows:

	December 31,
	2020		2019
	(In thousands)
One year or less	$	1,494,129	$	1,293,613
After one year to two years	337,579		548,995
After two years to three years	52,809		142,458
After three years to four years	23,018		11,362
After four years	50,831		16,717
	$	1,958,366	$	2,013,145

    Interest expense on deposits for the years ended December 31, 2020, 2019, and 2018 are summarized as follows:

	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Demand (including money market accounts)	$	15,556	$	19,922	$	12,933
Savings and club deposits	1,023		770		993
Certificates of deposit	38,667		40,859		25,597
	$	55,246	$	61,551	$	39,523

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Borrowings (Tables)

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

Schedule of borrowed funds

Borrowings at December 31, 2020 and 2019 are summarized as follows:

	December 31,
	2020		2019		2020		2019
	Balance				Weighted Average Interest Rate
	(In thousands)
Overnight lines of credit	$	—	$	107,800	—	%	1.81	%
FHLB advances	792,412		1,275,391		1.18		2.09
Subordinated notes	—		16,899		—		6.75
Junior subordinated debentures	6,952		6,932		3.20		5.09
	$	799,364	$	1,407,022	1.20	%	2.14	%

Schedule of borrowed funds contractual maturity

Scheduled maturities of FHLB advances at December 31, 2020 are summarized as follows:

	Year Ended December 31,
	2020
	(In thousands)
One year or less	$	496,042
After one year to two years	179,706
After two years to three years	40,391
After three years to four years	51,273
After four years	25,000
Total FHLB advances	$	792,412

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Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Public Utilities General Disclosures

The following table presents the Company's and the Bank's actual capital amounts and ratios at December 31, 2020 and 2019 compared to the Federal Reserve Bank minimum capital adequacy requirements and the Federal Reserve Bank requirements for classification as a well-capitalized institution:

(13)    Stockholders' Equity (continued)

Regulatory Capital (continued)

	Actual				Minimum Capital Adequacy Requirements				Minimum Capital Adequacy Requirements With Capital Conservation Buffer				To Be Well Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio		Amount		Ratio		Amount		Ratio		Amount		Ratio
Company	(In thousands, except ratio data)
At December 31, 2020:
Total capital (to risk-weighted assets)	$	1,070,361	18.54	%	$	461,766	8.00	%	$	606,068	10.50	%	N/A		N/A
Tier 1 capital (to risk-weighted assets)	998,172		17.29		346,325		6.00		490,627		8.50		N/A		N/A
Common equity tier 1 capital (to risk-weighted assets)	990,955		17.17		259,744		4.50		404,046		7.00		N/A		N/A
Tier 1 capital (to adjusted total assets)	998,172		11.38		350,923		4.00		350,923		4.00		N/A		N/A
At December 31, 2019:
Total capital (to risk-weighted assets)	$	1,061,555	17.25	%	$	492,438	8.00	%	$	646,324	10.50	%	N/A		N/A
Tier 1 capital (to risk-weighted assets)	988,172		16.05		369,328		6.00		523,215		8.50		N/A		N/A
Common equity tier 1 capital (to risk-weighted assets)	980,995		15.94		276,996		4.50		430,883		7.00		N/A		N/A
Tier 1 capital (to adjusted total assets)	988,172		12.92		305,824		4.00		305,824		4.00		N/A		N/A
Bank
At December 31, 2020:
Total capital (to risk-weighted assets)	$	924,959	16.05	%	$	460,944	8.00	%	$	604,989	10.50	%	$	576,180	10.00	%
Tier 1 capital (to risk-weighted assets)	852,897		14.80		345,708		6.00		489,753		8.50		460,944		8.00
Common equity tier 1 capital (to risk-weighted assets)	852,897		14.80		259,281		4.50		403,326		7.00		374,517		6.50
Tier 1 capital (to adjusted total assets)	852,897		9.72		350,815		4.00		350,815		4.00		438,519		5.00
At December 31, 2019:
Total capital (to risk-weighted assets)	$	844,664	14.25	%	$	474,125	8.00	%	$	622,290	10.50	%	$	592,657	10.00	%
Tier 1 capital (to risk-weighted assets)	782,881		13.21		355,594		6.00		503,758		8.50		474,125		8.00
Common equity tier 1 capital (to risk-weighted assets)	782,881		13.21		266,696		4.50		414,860		7.00		385,227		6.50
Tier 1 capital (to adjusted total assets)	782,881		10.25		305,423		4.00		305,423		4.00		381,779		5.00

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Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2020

Retirement Benefits [Abstract]

Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan

The following table sets forth information regarding the Pension, RIM, Post-retirement and Split-Dollar Life Insurance Plans at December 31, 2020 and 2019:

(14)    Employee Benefit Plans (continued)

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, Split-Dollar Life Insurance Plans (cont'd)

	December 31,
	2020		2019		2020		2019		2020		2019		2020		2019
	Pension Plan				RIM Plan				Post-retirement Plan				Split-Dollar Life Insurance
	(In thousands)
Change in benefit obligation:
Benefit obligation at beginning of year	$	263,826	$	209,205	$	13,696	$	11,285	$	24,603	$	20,964	$	14,100	$	10,462
Acquired	—		—		—		—		—		—		1,981		310
Service cost	7,985		6,494		267		210		394		339		467		354
Interest cost	7,608		8,569		405		466		683		826		507		457
Actuarial (gain) loss	40,281		46,001		2,506		2,074		5,506		3,141		3,137		2,649
Benefits paid	(7,260)		(6,443)		(344)		(339)		(565)		(667)		(211)		(132)
Benefit obligation at end of year	312,440		263,826		16,530		13,696		30,621		24,603		19,981		14,100
Change in plan assets:
Fair value of plan assets at beginning of year	356,347		272,974		—		—		—		—		—		—
Actuarial return on plan assets	50,820		54,816		—		—		—		—		—		—
Employer contributions	12,000		35,000		344		339		565		667		211		132
Benefits paid	(7,260)		(6,443)		(344)		(339)		(565)		(667)		(211)		(132)
Fair value of plan assets at end of year	411,907		356,347		—		—		—		—		—		—
Funded status at end of year	$	99,467	$	92,521	$	(16,530)	$	(13,696)	$	(30,621)	$	(24,603)	$	(19,981)	$	(14,100)

Schedule of Net Benefit Costs

Net periodic benefit (income) cost for the Pension Plan, RIM Plan, Post-retirement Plan and Split-dollar Life Insurance plan benefits for the years ended December 31, 2020 and 2019, and 2018, includes the following components:

	For the Year Ended December 31,
	2020
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	7,985	$	267	$	394	$	467	Compensation and employee benefits
Interest cost	7,608		405		683		507		Other non-interest expense
Expected return on plan assets	(23,375)		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		56		Other non-interest expense
Net loss	4,902		397		309		454		Other non-interest expense
Net periodic (income) benefit cost	$	(2,880)	$	1,069	$	1,386	$	1,484

(14)    Employee Benefit Plans (continued)

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, Split-Dollar Life Insurance Plans (cont'd)

	For the Year Ended December 31,
	2019
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	6,494	$	210	$	339	$	354	Compensation and employee benefits
Interest cost	8,569		466		826		457		Other non-interest expense
Expected return on plan assets	(21,058)		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		56		Other non-interest expense
Net loss	3,070		244		147		247		Other non-interest expense
Net periodic (income) benefit cost	$	(2,925)	$	920	$	1,312	$	1,114

	For the Year Ended December 31,
	2018
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	7,805	$	282	$	417	$	374	Compensation and employee benefits
Interest cost	8,489		443		796		428		Other non-interest expense
Expected return on plan assets	(20,794)		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		(106)		32		Other non-interest expense
Net loss	3,117		413		323		506		Other non-interest expense
Net periodic (income) benefit cost	$	(1,383)	$	1,138	$	1,430	$	1,340

Condensed Income Statement

The following table summarizes the impact of retrospective application of ASU 2017-07 to the Consolidated Statements of Income for the year ended December 31, 2018:

	Year Ended December 31, 2018
	(In thousands)
Compensation and employee benefits:
As previously reported	$	69,907
As reported under ASU 2017-07	77,226
Other non-interest expense:
As previously reported	$	12,916
As reported under ASU 2017-07	5,597

Schedule of Amounts Recognized in Other Comprehensive Income (Loss)

The components of accumulated other comprehensive income related to the Pension Plan, RIM Plan, and Post-retirement Plan on a pre-tax basis, at December 31, 2020, 2019, and $2018, are summarized in the following table:

	At December 31,
	2020								2019
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance		Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
	(In thousands)
Unrecognized prior service costs	$	—	$	—	$	—	$	405	$	—	$	—	$	—	$	461
Unrecognized net actuarial income	76,686		7,686		12,417		8,741		68,752		5,777		7,221		6,058
Total accumulated other comprehensive income	$	76,686	$	7,686	$	12,417	$	9,146	$	68,752	$	5,777	$	7,221	$	6,519

(14)    Employee Benefit Plans (continued)

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, Split-Dollar Life Insurance Plans (cont'd)

	At December 31
	2018
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
	(In thousands)
Unrecognized prior service costs	$	—	$	—	$	—	$	517
Unrecognized net actuarial income	59,579		3,748		4,226		3,658
Total accumulated other comprehensive income	$	59,579	$	3,748	$	4,226	$	4,175

The weighted average actuarial assumptions used in the plan determinations at and for the years ended December 31, 2020, 2019, and 2018 were as follows:

	At and For the Years Ended December 31,
	2020
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
Weighted average assumptions used to determine benefit obligation:
Discount rate	2.920	%	2.670	%	2.590	%	3.010	%
Rate of compensation increase	3.750		3.750		N/A		3.750
Weighted average assumptions used to determine net periodic benefit cost:
Discount Rates:
Benefit obligation	3.490	%	3.330	%	3.270	%	3.540	%
Remeasurement rate	2.740		N/A		N/A		N/A
Service cost	3.660		3.460		3.520		3.710
Remeasurement rate	2.970		N/A		N/A		N/A
Interest cost	3.120		3.000		2.850		3.280
Remeasurement rate	2.220		N/A		N/A		N/A
Expected rate of return on plan assets	6.500		N/A		N/A		N/A
Rate of compensation increase	3.500		3.500		N/A		3.500

	At and For the Years Ended December 31,
	2019
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
Weighted average assumptions used to determine benefit obligation:
Discount rate	3.490	%	3.330	%	3.270	%	3.540	%
Rate of compensation increase	3.500		3.500		N/A		3.500
Weighted average assumptions used to determine net periodic benefit cost:
Discount Rates:
Benefit obligation	4.570	%	4.470	%	4.410	%	4.630	%
Remeasurement rate	3.850		N/A		N/A		N/A
Service cost	4.700		4.570		4.600		4.740
Remeasurement rate	4.040		N/A		N/A		N/A
Interest cost	4.250		4.180		4.050		4.390
Remeasurement rate	3.440		N/A		N/A		N/A
Expected rate of return on plan assets	7.000		N/A		N/A		N/A
Rate of compensation increase	3.500		3.500		N/A		3.500

(14)    Employee Benefit Plans (continued)

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, Split-Dollar Life Insurance Plans (cont'd)

	At and For the Years Ended December 31,
	2018
	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
Weighted average assumptions used to determine benefit obligation:
Discount rate	4.570	%	4.470	%	4.410	%	4.630	%
Rate of compensation increase	3.500		3.500		N/A		3.500
Weighted average assumptions used to determine net periodic benefit cost:
Discount Rates:
Benefit obligation	3.750	%	4.470	%	3.625	%	3.750	%
Service cost	N/A		4.570		N/A		N/A
Interest cost	N/A		4.180		N/A		N/A
Expected rate of return on plan assets	7.250		N/A		N/A		N/A
Rate of compensation increase	3.500		3.500		N/A		3.500

Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates

A 1% change in the assumed health care cost trend rate would have the following effects on post-retirement benefits at December 31, 2020:

	1% increase		1% decrease
	(In thousands)
Effect on total service cost and interest cost	$	19	$	(16)
Effect on post-retirement benefit obligations	175		(154)

Schedule of Expected Benefit Payments

Estimated future benefit payments, which reflect expected future service, as appropriate for the next five years and thereafter are as follows:

	Pension Plan		RIM Plan		Post-retirement Plan		Split-Dollar Life Insurance
	(In thousands)
2021	$	8,568	$	384	$	1,490	$	270
2022	9,141		436		1,525		312
2023	9,847		534		1,559		363
2024	10,592		673		1,622		412
2025	11,388		778		1,675		461
2026 - 2030	68,978		4,415		8,820		3,179

Schedule of Allocation of Plan Assets

The weighted average asset allocation of pension assets at December 31, 2020 and 2019 were as follows:

	December 31,
	2020		2019
Domestic equities	44.1	%	39.6	%
Foreign equities	13.4	%	9.6	%
Fixed income	37.8	%	44.3	%
Real estate	4.4	%	6.1	%
Cash	0.3	%	0.4	%
Total	100.0	%	100.0	%

The target allocation of assets and acceptable ranges around the targets are as follows:

	Allowable Range
Equities	40-60%
Fixed income	40-60%
Real estate	0-10%
Cash	0-15%

The following tables present the assets that are measured at fair value on a recurring basis by level within the U.S. GAAP fair value hierarchy as reported on the Statements of Net Assets Available for Plan Benefits at December 31, 2020 and 2019, respectively. A financial instrument's level within the fair value hierarchy's is based on the lowest level of input that is significant to the fair value measurement.

(14)    Employee Benefit Plans (continued)

Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, Split-Dollar Life Insurance Plans (cont'd)

	December 31, 2020
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Money market mutual funds	$	1,434	$	1,434	$	—	$	—
Mutual funds - value stock fund	29,914		29,914		—		—
Mutual funds - fixed income	155,864		155,864		—		—
Mutual funds - international stock	55,300		55,300		—		—
Mutual funds - institutional stock index	151,436		151,436		—		—
Commingled real estate funds	17,959		—		17,959		—
	$	411,907	$	393,948	$	17,959	$	—

	December 31, 2019
			Fair Value Measurements
	Fair value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Money market mutual funds	$	1,462	$	1,462	$	—	$	—
Mutual funds - value stock fund	27,827		27,827		—		—
Mutual funds - fixed income	158,030		158,030		—		—
Mutual funds - international stock	34,332		34,332		—		—
Mutual funds - institutional stock index	113,100		113,100		—		—
Commingled real estate funds	21,596		—		21,596		—
	$	356,347	$	334,751	$	21,596	$	—

Employee Stock Ownership Plan (ESOP) Disclosures

The ESOP shares were as follows:

	December 31,
	2020		2019
	(In thousands)
Allocated shares	606		385
Unearned shares	3,929		4,156
Total ESOP shares	4,535		4,541
Fair value of unearned ESOP shares	$	61,139	$	70,409

Nonvested Restricted Stock Shares Activity

The following is a summary of the Company's restricted stock activity during the years ended December 31, 2020 and 2019:

	Number of Restricted Shares	Weighted Average Grant Date Fair Value
Non-vested at January 1, 2019	—	$	—
Grants	1,464,243	15.67
Forfeited	(44,231)	15.60
Non-vested at December 31, 2019	1,420,012	$	15.67
Grants	33,160	15.08
Vested	(172,756)	15.66
Forfeited	(17,247)	16.02
Non-vested at December 31, 2020	1,263,169	$	15.66

Share-based Payment Arrangement, Option, Activity

The following is a summary of the Company's option activity during the years ended December 31, 2020 and 2019:

	Number of Stock Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding January 1, 2019	—	$	—	—	$	—
Granted	3,892,279	15.60		9.6	—
Forfeited	(108,235)	15.60		—	—
Outstanding, December 31, 2019	3,784,044	$	15.67	9.6	$	4,812,490
Expired	(10,457)	15.98		—	—
Forfeited	(64,959)	15.84		—	—
Outstanding, December 31, 2020	3,708,628	$	15.66	8.6	$	—
Options exercisable at December 31, 2020	743,298	$	15.66	8.5	$	—

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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit)

The current and deferred amounts of income tax expense (benefit) for the years ended December 31, 2020, 2019, and 2018 are as follows:

	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Current:
Federal	$	5,072	$	5,933	$	11,284
State	3,844		2,905		5,129
Total current	8,916		8,838		16,413
Deferred:
Federal	9,847		8,275		(4,901)
State	(109)		(748)		(589)
Total deferred	9,738		7,527		(5,490)
Total income tax expense	$	18,654	$	16,365	$	10,923

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation between the amount of reported total income tax expense and the amount computed by multiplying the applicable statutory federal income tax rate of 21% is as follows:

	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Tax expense at applicable statutory rate	$	16,013	$	14,927	$	7,067
Increase (decrease) in taxes resulting from:
State tax, net of federal income tax benefit	2,951		1,704		3,587
ESOP fair market value adjustment	187		272		202
Tax exempt interest income	(11)		(6)		(4)
Income from Bank-owned life insurance	(1,075)		(1,246)		(812)
Dividend received deduction	(9)		(8)		(16)
Non-deductible merger-related expenses	42		222		—
Non-deductible compensation expense	—		398		—
Other, net	556		102		899
Total income tax expense	$	18,654	$	16,365	$	10,923

Schedule of Deferred Tax Assets and Liabilities

The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2020 and 2019 are as follows:

	At December 31,
	2020		2019
	(In thousands)
Deferred tax assets:
Allowance for loan losses	$	20,878	$	13,114
Post-retirement benefits	5,928		4,089
Deferred compensation	2,779		2,085
Depreciation	—		1,002
Retirement Income Maintenance plan	2,471		1,725
ESOP	624		301
Stock-based compensation	2,724		788
Reserve for uncollected interest	126		54
Net unrealized losses on debt securities and defined benefit plans	18,511		18,374
Federal and State NOLs	9,719		2,063
Alternative minimum assessment carryforwards	2,156		2,156
Charitable contribution carryforward	6,359		5,981
Purchase accounting	1,024		—
Lease liability	5,609		—
Other items	3,215		332
Gross deferred tax assets	82,123		58,999
Valuation allowance	(3,411)		(7,442)
	78,712		51,557
Deferred tax liabilities:
Pension expense	49,225		33,856
Depreciation	6,118		—
Deferred loan costs	8,555		5,911
Intangible assets	1,597		1,215
Lease right-of-use asset	5,317		—
Other items	716		266
Total gross deferred tax liabilities	71,528		41,248
Net deferred tax asset	$	7,184	$	10,309

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Financial Transactions with Off-Balance-Sheet risk and Concentrations of Credit risk (Tables)

12 Months Ended

Dec. 31, 2020

Commitments and Contingencies Disclosure [Abstract]

Schedules of Concentration of Risk, by Risk Factor

At December 31, 2020 and 2019, the following commitments existed which are not reflected in the Consolidated Statements of Financial Condition:

	December 31,
	2020		2019
	(In thousands)
Loan commitments:
Residential real estate	$	149,847	$	91,141
Multifamily and commercial real estate	98,910		95,025
Commercial business	16,842		18,737
Construction	13,335		59,990
Consumer including home equity loans and advances	3,264		5,988
Total loan commitments	$	282,198	$	270,881

XML

Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Schedule of fair value assets and liabilities measured on recurring basis

The following tables present the assets and liabilities reported on the Consolidated Statements of Financial Condition at their fair values as of December 31, 2020 and 2019, by level within the fair value hierarchy:

	December 31, 2020
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Debt securities available for sale:
U.S. government and agency obligations	$	25,549	$	25,549	$	—	$	—
Mortgage-backed securities and collateralized mortgage obligations	1,200,394		—		1,200,394		—
Municipal obligations	16,862		—		16,862		—
Corporate debt securities	69,477		—		69,477		—
Trust preferred securities	4,670		—		4,670		—
Total debt securities available for sale	1,316,952		25,549		1,291,403		—
Equity securities	5,418		5,072		346		—
Derivative assets	19,425		—		19,425		—
	$	1,341,795	$	30,621	1,311,174		$	—
Derivative liabilities	$	42,384	$	—	$	42,384	$	—

(17)    Fair Value Measurements (continued)

	December 31, 2019
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Debt securities available for sale:
U.S. government and agency obligations	$	42,386	$	42,386	$	—	$	—
Mortgage-backed securities and collateralized mortgage obligations	979,881		—		979,881		—
Municipal obligations	2,284		—		2,284		—
Corporate debt securities	69,180		—		69,180		—
Trust preferred securities	4,605		—		4,605		—
Total debt securities available for sale	1,098,336		42,386		1,055,950		—
Equity securities	2,855		2,587		268		—
Derivative assets	185		—		185		—
	$	1,101,376	$	44,973	$	1,056,403	$	—
Derivative liabilities	$	11,546	$	—	$	11,546	$	—

Schedule of fair value assets and liabilities measured on non-recurring basis

The following tables present the assets and liabilities reported on the Consolidated Statements of Financial Condition at their fair values on a non-recurring basis at December 31, 2020 and 2019, by level within the fair value hierarchy:

	December 31, 2020
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Mortgage servicing rights	$	1,338	$	—	$	—	$	1,338
	$	1,338	$	—	$	—	$	1,338

	December 31, 2019
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Impaired loans	$	1,063	$	—	$	—	$	1,063
Mortgage servicing rights	681		—		—		681
	$	1,744	$	—	$	—	$	1,744

Schedule of qualitative information for Level 3 assets measured at fair value on a non-recurring basis

The following table presents information for Level 3 assets measured at fair value on a non-recurring basis at December 31, 2020 and 2019:

	December 31, 2020
	Fair Value		Valuation Methodology	Unobservable Inputs	Range of Inputs	Weighted Average
	(Dollars in thousands)
Mortgage servicing rights	$	1,338	Estimated cash flow	Prepayment speeds and discount rates (2)	9.7% - 26.2%	16.7%

	December 31, 2019
	Fair Value		Valuation Methodology	Unobservable Inputs	Range of Inputs	Weighted Average
	(Dollars in thousands)
Impaired loans	$	1,063	Estimated cash flow	Expected value of future cash flows (1)	—%	—%
Mortgage servicing rights	681		Estimated cash flow	Prepayment speeds and discount rates (3)	3.6% - 24.0%	12.7%
(1) Value based on management's estimate of expected future cash flows.
(2) Value of SBA servicing rights based on a discount rate of 10.25%.
(3) Value of SBA servicing rights based on a discount rate of 11.75%.

Schedule of fair value assets and liabilities on Consolidated Balance Sheets

The following tables present the assets and liabilities reported on the Consolidated Statements of Financial Condition at their fair values as of December 31, 2020 and 2019:

	December 31, 2020
			Fair Value Measurements
	Carrying Value		Total Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Financial assets:
Cash and cash equivalents	$	422,957	$	422,957	$	422,957	$	—	$	—
Debt securities available for sale	1,316,952		1,316,952		25,549		1,291,403		—
Debt securities held to maturity	262,720		277,091		5,001		272,090		—
Equity securities	5,418		5,418		5,072		346
Federal Home Loan Bank stock	43,759		43,759		—		43,759		—
Loans receivable, net	6,107,094		6,394,524		—		—		6,394,524
Derivative assets	19,425		19,425		—		19,425		—
Financial liabilities:
Deposits	$	6,778,624	$	6,793,034	$	—	$	6,793,034	$	—
Borrowings	799,364		808,853		—		808,853		—
Derivative liabilities	42,384		42,384		—		42,384		—

(17)    Fair Value Measurements (continued)

	December 31, 2019
			Fair Value Measurements
	Carrying Value		Total Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Financial assets:
Cash and cash equivalents	$	75,547	$	75,547	$	75,547	$	—	$	—
Debt securities available for sale	1,098,336		1,098,336		42,386		1,055,950		—
Debt securities held to maturity	285,756		289,505		19,960		269,545		—
Equity securities	2,855		2,855		2,587		268		—
Federal Home Loan Bank stock	69,579		69,579		—		69,579		—
Loans receivable, net	6,135,857		6,219,008		—		—		6,219,008
Derivative assets	185		185		—		185		—
Financial liabilities:
Deposits	$	5,645,842	$	5,654,075	$	—	$	5,654,075	$	—
Borrowings	1,407,022		1,411,962		—		1,411,962		—
Derivative liabilities	11,546		11,546		—		11,546		—

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Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2020

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information

The following tables are a condensed summary of certain quarterly results of operations for the years ended December 31, 2020, 2019, and 2018:

	Quarters Ended December 31, 2020
	March 31		June 30		September 30		December 31
	(Dollars in thousands, except per share data)
Total interest income	$	74,690	$	75,587	$	72,933	$	72,501
Total interest expense	23,988		19,716		16,609		13,825
Net interest income	50,702		55,871		56,324		58,676
Provision for credit losses	9,568		5,736		2,516		627
Net interest income after provision for credit losses	41,134		50,135		53,808		58,049
Total non-interest income	6,391		7,008		7,909		9,962
Total non-interest expense	38,508		37,443		41,378		40,810
Income before income tax expense	9,017		19,700		20,339		27,201
Income tax expense	2,252		4,603		5,252		6,547
Net income	$	6,765	$	15,097	$	15,087	$	20,654
Earnings per share - basic and diluted	$	0.06	$	0.14	$	0.14	$	0.19
Weighted average shares outstanding - basic and diluted	108,438,173		111,102,306		110,983,871		108,499,658

	Quarters Ended December 31, 2019
	March 31		June 30		September 30		December 31
	(Dollars in thousands, except per share data)
Total interest income	$	62,887	$	62,732	$	64,438	$	71,026
Total interest expense	20,503		21,889		22,722		23,598
Net interest income	42,384		40,843		41,716		47,428
Provision for loan losses	436		112		1,157		2,519
Net interest income after provision for loan losses	41,948		40,731		40,559		44,909
Total non-interest income	6,037		6,775		10,115		8,709
Total non-interest expense	29,559		31,841		31,064		36,237
Income before income tax expense	18,426		15,665		19,610		17,381
Income tax expense	3,507		3,634		5,392		3,832
Net income	$	14,919	$	12,031	$	14,218	$	13,549
Earnings per share - basic and diluted	$	0.13	$	0.11	$	0.13	$	0.12
Weighted average shares outstanding - basic and diluted	111,536,577		111,553,203		111,371,754		109,958,999

(18)    Selected Quarterly Financial Data (Unaudited) (continued)

	Quarters Ended December 31, 2018
	March 31		June 30		September 30		December 31
	(Dollars in thousands, except per share data)
Total interest income	$	51,791	$	55,019	$	57,695	$	61,785
Total interest expense	12,730		14,004		17,112		18,410
Net interest income	39,061		41,015		40,583		43,375
Provision for loan losses	2,000		2,400		1,500		777
Net interest income after provision for loan losses	37,061		38,615		39,083		42,598
Total non-interest income	4,543		5,450		5,290		6,405
Total non-interest expense	26,015		61,768		26,590		31,013
Income (loss) before income tax expense	15,589		(17,703)		17,783		17,990
Income tax expense (benefit)	3,805		(2,961)		6,956		3,123
Net income (loss)	$	11,784	$	(14,742)	$	10,827	$	14,867
Earnings per share - basic and diluted	N/A		$	(0.13)	$	0.10	$	0.13
Weighted average shares outstanding - basic and diluted	N/A		111,360,278		111,389,951		111,423,361

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Earnings per Share (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following is a reconciliation of the numerators and denominators of the basic and diluted earnings per share calculations for the years ended December 31, 2020, 2019,and 2018:

	December 31,
	2020		2019		2018
	(In thousands, except share and per share data)
Net income	$	57,603	$	54,717	$	22,736
Shares:
Weighted average shares outstanding - basic	109,755,924		111,101,246		111,395,723
Weighted average dilutive shares outstanding	—		—		—
Weighted average shares outstanding - diluted	109,755,924		111,101,246		111,395,723
Earnings per share:
Basic	$	0.52	$	0.49	$	0.20
Diluted	$	0.52	$	0.49	$	0.20

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Parent-only Financial Information (Tables)

12 Months Ended

Dec. 31, 2020

Condensed Financial Information Disclosure [Abstract]

Condensed Balance Sheet

The condensed financial statements of Columbia Financial, Inc. (parent company) are presented below:

Statements of Financial Condition
	December 31,
	2020		2019
	(In thousands)
Assets
Cash and due from banks	$	94,053	$	168,242
Short-term investments	170		127
Total cash and cash equivalents	94,223		168,369
Debt securities available for sale, at fair value	—		1,496
Equity securities, at fair value	1,167		1,282
Investment in subsidiaries	873,629		785,964
Loan receivable from Bank	41,461		42,982
Other assets	9,803		8,431
Total assets	$	1,020,283	$	1,008,524
Liabilities and Stockholders' Equity
Liabilities:
Borrowings	$	6,953	$	23,831
Accrued expenses and other liabilities	2,043		2,176
Total liabilities	8,996		26,007
Stockholders' equity	1,011,287		982,517
Total liabilities and stockholders' equity	$	1,020,283	$	1,008,524

Condensed Statement of Comprehensive Income

Statements of Comprehensive Income (Loss)
	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Dividends from subsidiary	$	50,000	$	179,000	$	—
Interest income:
Loans receivable	2,047		2,111		1,513
Debt securities available for sale and equity securities	51		51		123
Interest-earning deposits	1		173		871
Total interest income	52,099		181,335		2,507
Interest expense on borrowings	863		176		3,468
Net interest income (expense)	51,236		181,159		(961)
Equity earnings (loss) in subsidiary	8,027		(123,142)		51,401
Non-interest income:
Gain on securities transactions	2		236		—
Change in fair value of equity securities	(115)		65		—
Other non-interest income	—		139		—
Total non-interest income	(113)		440		—
Non-interest expense:
Charitable contribution to foundation	—		—		34,767
Merger-related expenses	280		1,807		—
Other non-interest expense	1,377		1,955		425
Total non-interest expense	1,657		3,762		35,192
Income before income tax benefit	57,493		54,695		15,248
Income tax benefit	110		22		7,488
Net income	57,603		54,717		22,736
Other comprehensive income (loss)	(890)		3,710		(6,487)
Comprehensive income (loss)	$	56,713	$	58,427	$	16,249

Condensed Cash Flow Statement

Statements of Cash Flows
	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Cash flows from operating activities:
Net income	$	57,603	$	54,717	$	22,736
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of debt issuance costs	—		—		890
Amortization of intangible assets	(278)		(71)		—
Gain on securities transactions	(2)		(236)		—
Change in fair value of equity securities	115		(65)		—
Deferred tax expense (benefit)	1,411		1,453		(6,086)
( Increase) decrease in other assets	(2,675)		(2,026)		1,515
(Decrease) increase in accrued expenses and other liabilities	(647)		3,515		(1,498)
Contribution of common stock to Columbia Bank Foundation	—		—		34,767
Equity in undistributed (earnings) loss of subsidiary	(8,027)		123,142		(51,401)
Net cash provided by operating activities	$	47,500	$	180,429	$	923
Cash flows from investing activities:
Capital contribution to subsidiary	$	—	$	—	$	(246,420)
Proceeds from sales of equity securities	—		1,065		—
Proceeds from paydowns/maturities/calls of debt securities available for sale	1,498		500		1,601
Purchases of debt securities available for sale	—		—		(414)
Purchases of equity securities	—		(416)		—
Loan to ESOP	—		—		(45,428)
Repayment of loan receivable from Bank	1,521		1,457		989
Net cash paid in acquisition	—		(135,410)		—
Net cash provided by (used in) investing activities	$	3,019	$	(132,804)	$	(289,672)
Cash flows from financing activities:
Payments of subordinated debt and trust preferred securities	$	(16,600)	$	—	$	(51,547)
Issuance of common stock in initial public offering	—		—		492,428
Purchase of treasury stock	(108,166)		(55,309)		—
Issuance of common stock allocated to restricted stock award grants	—		21,687		—
Restricted stock forfeitures	(199)		(736)		—
Repurchase of shares for taxes	(181)		—		—
Issuance of treasury stock allocated to restricted stock award grants	481		1,269		—
Net cash (used in) provided by financing activities	$	(124,665)	$	(33,089)	$	440,881

(20)    Parent-only Financial Information (continued)

Statements of Cash Flows
	Years Ended December 31,
	2020		2019		2018
	(In thousands)
Net (decrease) increase in cash and cash equivalents	$	(74,146)	$	14,536	$	152,132
Cash and cash equivalents at beginning of year	168,369		153,833		1,701
Cash and cash equivalents at end of period	$	94,223	$	168,369	$	153,833
Acquisition:
Non-cash assets acquired:
Debt securities available for sale	$	—	$	1,998	$	—
Equity securities	—		208		—
Other assets	—		1,492		—
Total non-cash assets acquired	$	—	$	3,698	$	—
Liabilities assumed:
Borrowings	$	—	$	23,901	$	—
Total liabilities assumed	$	—	$	23,901	$	—
Net non-cash liabilities acquired	$	—	$	(20,203)	$	—
Net cash and cash equivalents acquired in acquisitions	$	—	$	884	$	—

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Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Schedule of Other Comprehensive Income (Loss)

The following tables present the components of other comprehensive income (loss), both gross and net of tax, for the years ended December 31, 2020, 2019, and 2018:

	For the Years Ended December 31,
	2020						2019
	Before Tax		Tax Effect		After Tax		Before Tax		Tax Effect		After Tax
	(In thousands)
Components of other comprehensive income (loss):
Unrealized gains on debt securities available for sale:	$	26,876	$	(5,640)	$	21,236	$	26,601	$	(5,534)	$	21,067
Accretion of unrealized gain on debt securities reclassified as held to maturity	160		(34)		126		11		(2)		9
Reclassification adjustment for gains included in net income	370		(81)		289		2,612		(601)		2,011
	27,406		(5,755)		21,651		29,224		(6,137)		23,087
Derivatives:
Unrealized (loss) on swap contracts accounted for as cash flow hedges	(10,605)		2,223		(8,382)		(8,193)		1,725		(6,468)
Employee benefit plans:
Amortization of prior service cost included in net income	(56)		12		(44)		(56)		12		(44)
Reclassification adjustment of actuarial net (loss) included in net income	(4,284)		900		(3,384)		(3,709)		779		(2,930)
Change in funded status of retirement obligations	(13,583)		2,852		(10,731)		(12,576)		2,641		(9,935)
	(17,923)		3,764		(14,159)		(16,341)		3,432		(12,909)
Total other comprehensive (loss) income	$	(1,122)	$	232	$	(890)	$	4,690	$	(980)	$	3,710

(21)    Other Comprehensive Income (Loss) (continued)

	For the Year Ended December 31,
	2018
	Before Tax		Tax Effect		After Tax
	(In thousands)
Components of other comprehensive(loss) income:
Unrealized (losses) on debt securities available for sale:	$	(7,224)	$	1,446	$	(5,778)
Accretion of unrealized (loss) on debt securities reclassified as held to maturity	(13)		—		(13)
Reclassification adjustment for (losses) included in net income	(116)		24		(92)
	(7,353)		1,470		(5,883)
Derivatives:
Unrealized (loss)on swap contracts accounted for as cash flow hedges	(2,825)		595		(2,230)
Employee benefit plans:
Amortization of prior service cost included in net income	(623)		132		(491)
Reclassification adjustment of actuarial net loss included in net income	2,526		(530)		1,996
Change in funded status of retirement obligations	897		(776)		121
	2,800		(1,174)		1,626
Total other comprehensive (loss) income	$	(7,378)	$	891	$	(6,487)

Components of Other Comprehensive Income (Loss)

The following tables present the changes in the components of accumulated other comprehensive income (loss), net of tax, for the years ended December 31, 2020, 2019, and 2018:

	For the Years Ended December 31,
	2020								2019
	Unrealized Gains on Debt Securities Available for Sale		Unrealized (Losses) on Swaps		Employee Benefit Plans		Accumulated Other Comprehensive (Loss)		Unrealized (Losses) Gains on Debt Securities Available for Sale		Unrealized (Losses) on Swaps		Employee Benefit Plans		Accumulated Other Comprehensive (Loss)
	(In thousands)
Balance at beginning of period	$	9,377	$	(8,474)	$	(69,638)	$	(68,735)	$	(13,162)	$	(2,006)	$	(56,729)	$	(71,897)
Effect of the adoption of ASU 2016-01	—						—		(548)		—		—		(548)
Balance at January 1,	$	9,377	$	(8,474)	$	(69,638)	$	(68,735)	$	(13,710)	$	(2,006)	$	(56,729)	$	(72,445)
Current period changes in other comprehensive income (loss)	21,651		(8,382)		(14,159)		(890)		23,087		(6,468)		(12,909)		3,710
Total other comprehensive income (loss)	$	31,028	$	(16,856)	$	(83,797)	$	(69,625)	$	9,377	$	(8,474)	$	(69,638)	$	(68,735)

	For the Year Ended December 31,
	2018
	Unrealized (Losses) on Debt Securities Available for Sale		Unrealized Gains (Losses) on Swaps		Employee Benefit Plans		Accumulated Other Comprehensive (Loss)
	(In thousands)
Balance at beginning of period	$	(7,279)	$	224	$	(58,355)	$	(65,410)
Current period changes in other comprehensive (loss) income	(5,883)		(2,230)		1,626		(6,487)
Total other comprehensive (loss)	$	(13,162)	$	(2,006)	$	(56,729)	$	(71,897)

Reclassification out of AOCI

The following tables reflect amounts reclassified from accumulated other comprehensive income (loss) in the Consolidated Statements of Income and the affected line item in the statement where net income is presented for the years ended December 31, 2020, 2019, and 2018:

	Accumulated Other Comprehensive (Loss) Income Components
	For the Years Ended December 31,						Affected line items in the Consolidated Statements of Income
	2020		2019		2018
	(In thousands)
Reclassification adjustment for gains (losses) included in net income	$	370	$	2,612	$	(116)	Gain (loss) on securities transactions
Reclassification adjustment of actuarial net (loss) gain included in net income	(4,284)		(3,709)		2,526		Other non-interest expense
Total before tax	(3,914)		(1,097)		2,410
Income (tax) benefit	819		178		(506)
Net of tax	$	(3,095)	$	(919)	$	1,904

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Derivatives and Hedging Activities (Tables)

12 Months Ended

Dec. 31, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of derivative financial instruments on the Consolidated Balance Sheets

The tables below present the fair value of the Company’s derivative financial instruments as well as their classification in the Consolidated Statements of Financial Condition at December 31, 2020 and 2019:

	December 31, 2020
	Asset Derivative			Liability Derivative
	Consolidated Statements of Financial Condition	Fair Value		Consolidated Statements of Financial Condition	Fair Value
	(In thousands)
Derivatives:
Interest rate swaps	Other Assets	$	19,425	Other Liabilities	$	42,384
Total derivative instruments		$	19,425		$	42,384
	December 31, 2019
	Asset Derivative			Liability Derivative
	Consolidated Statements of Financial Condition	Fair Value		Consolidated Statements of Financial Condition	Fair Value
	(In thousands)
Derivatives:
Interest rate swaps	Other Assets	$	185	Other Liabilities	$	11,546
Total derivative instruments		$	185		$	11,546

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Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following table presents non-interest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the years ended December 31, 2020, 2019, and 2018.

	For the Years Ended December 31,
	2020		2019		2018
	(In thousands)
Non-interest income
In-scope of Topic 606:
Demand deposit account fees	$	3,633	$	4,478	$	3,987
Title insurance fees	5,034		4,981		4,297
Other non-interest income	6,472		4,844		4,679
Total in-scope non-interest income	15,139		14,303		12,963
Total out-of-scope non-interest income	16,131		17,333		8,725
Total non-interest income	$	31,270	$	31,636	$	21,688

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Business (Details) - USD ($) $ / shares in Units, $ in Thousands	Apr. 01, 2020	Nov. 01, 2019	Apr. 19, 2018
Stewardship Financial Corporation
Subsidiary, Sale of Stock [Line Items]
Business acquisition, share price (in dollars per share)		$ 15.75
Cash paid for purchase		$ 136,294
Roselle Entities
Subsidiary, Sale of Stock [Line Items]
Business, acquisition, equity interest issued or issuable (in shares)	4,759,048
Columbia Bank, MHC
Subsidiary, Sale of Stock [Line Items]
Shares issued (in shares)			62,580,155,000
Columbia Bank Foundation
Subsidiary, Sale of Stock [Line Items]
Shares issued (in shares)			3,476,675,000
Columbia Bank Employee Stock Ownership Plan
Subsidiary, Sale of Stock [Line Items]
Shares issued (in shares)			49,832,345,000

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Summary of Significant Accounting Policies (Details) - USD ($)	1 Months Ended	12 Months Ended
	Apr. 30, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Nov. 30, 2019	Jul. 31, 2018	Dec. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Proceeds from sales of loans held-for-sale		$ 111,764,000	$ 101,946,000	$ 3,615,000
Junior subordinated debenture owed to unconsolidated subsidiary trust						$ 51,500,000
Assets		8,798,536,000	8,188,694,000
Cash reserves		4,900,000	8,800,000
Loan threshold for individual evaluation for impairment		500,000
Equity securities, at fair value		5,418,000	2,855,000
Stockholders' equity		1,011,287,000	982,517,000	972,060,000			$ 472,070,000
Variable Interest Entity, Not Primary Beneficiary
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Assets					$ 7,000,000.0
Cumulative Effect, Period of Adoption, Adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Stockholders' equity				0
Retained Earnings
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Stockholders' equity		$ 673,084,000	615,481,000	560,216,000			$ 537,480,000
Retained Earnings | Cumulative Effect, Period of Adoption, Adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Stockholders' equity				548,000
Buildings
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Property, plant and equipment, useful life		40 years
Minimum
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Defined contribution plan, employer matching contribution, percent of match		3.00%
Minimum | Land and building improvements
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Property, plant and equipment, useful life		10 years
Minimum | Furniture and equipment
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Property, plant and equipment, useful life		3 years
Maximum
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Defined contribution plan, employer matching contribution, percent of match		4.50%
Maximum | Land and building improvements
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Property, plant and equipment, useful life		20 years
Maximum | Furniture and equipment
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Property, plant and equipment, useful life		10 years
Accounting Standards Update 2016-01 | Cumulative Effect, Period of Adoption, Adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Equity securities, at fair value			1,900,000
Accounting Standards Update 2016-01 | Retained Earnings | Cumulative Effect, Period of Adoption, Adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Stockholders' equity			548,000	$ 548,000
Columbia Financial Capital Trust I
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Ownership percentage by parent						100.00%
Stewardship Statutory Trust I
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Ownership percentage by parent					100.00%
Columbia Bank Employee Stock Ownership Plan
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Loan term	20 years	20 years
Stewardship Property
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Assets held-for-sale, long-lived, fair value disclosure		$ 1,900,000	$ 1,800,000

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Acquisitions - Narrative (Details)			12 Months Ended
	Apr. 01, 2020 USD ($) shares	Nov. 01, 2019 USD ($) branch $ / shares	Dec. 31, 2020 USD ($) branch	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Business Acquisition [Line Items]
Assets			$ 8,798,536,000	$ 8,188,694,000
Loans receivable, net			6,107,094,000	6,135,857,000
Liabilities			7,787,249,000	7,206,177,000
Deposits			6,778,624,000	5,645,842,000
Balance			799,364,000	1,407,022,000
Merger-related expenses			1,931,000	2,755,000	$ 0
Goodwill			$ 80,285,000	60,763,000
Facility Closing
Business Acquisition [Line Items]
Number of branches closed | branch			4
Gain (loss) on restructuring			$ 770,000
Stewardship Financial Corporation
Business Acquisition [Line Items]
Business acquisition, share price (in dollars per share) | $ / shares		$ 15.75
Merger-related expenses			1,300,000	2,800,000
Goodwill		$ 55,047,000
Roselle Entities
Business Acquisition [Line Items]
Merger-related expenses			597,000	$ 0
Goodwill	$ 23,809,000		18,700,000
Business, acquisition, equity interest issued or issuable (in shares) | shares	4,759,048
Business combination, provisional information, initial accounting incomplete, adjustment, deferred tax assets			$ 5,100,000
Stewardship Financial Corporation
Business Acquisition [Line Items]
Assets		956,000,000.0
Loans receivable, net		756,900,000
Securities		52,600,000
Liabilities		877,800,000
Deposits		781,400,000
Balance		$ 81,800,000
Number of stores | branch		12
Core Deposits
Business Acquisition [Line Items]
Acquired finite-lived intangible assets, weighted average useful life			10 years
Core Deposits | Stewardship Financial Corporation
Business Acquisition [Line Items]
Core deposit intangible		$ 7,500,000
Leasehold Improvements and Equipment | Minimum
Business Acquisition [Line Items]
Property, plant and equipment, useful life			3 years
Leasehold Improvements and Equipment | Maximum
Business Acquisition [Line Items]
Property, plant and equipment, useful life			10 years

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Acquisitions - Assets Acquired and Liabilities Assumed in the Stewardship Acquisition (Details) - USD ($) $ in Thousands	Nov. 01, 2019	Dec. 31, 2020	Dec. 31, 2019
Liabilities assumed:
Goodwill		$ 80,285	$ 60,763
Stewardship Financial Corporation
Assets acquired:
Cash and cash equivalents	$ 105,006
Debt securities available for sale	51,710
Equity securities	1,073
Federal Home Loan Bank stock	3,716
Loans receivable	757,223
Accrued interest receivable	2,239
Office properties and equipment, net	6,815
Bank-owned life insurance	22,096
Deferred tax assets, net	3,534
Core deposit and other intangibles	7,467
Other assets	767
Total assets acquired	961,646
Liabilities assumed:
Deposits	782,698
Borrowings	82,761
Advance payments by borrowers for taxes and insurance	356
Accrued expenses and other liabilities	14,584
Total liabilities assumed	880,399
Net assets acquired	81,247
Cash paid for purchase	136,294
Goodwill	$ 55,047

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Acquisitions - Assets Acquired and Liabilities Assumed in Roselle Acquisition (Details) - USD ($) $ in Thousands	Apr. 01, 2020	Dec. 31, 2020	Dec. 31, 2019
Liabilities assumed:
Goodwill		$ 80,285	$ 60,763
Roselle Entities
Assets acquired:
Cash and cash equivalents	$ 155,248
Debt securities available for sale	51,479
Debt securities held to maturity	13,418
Equity securities	1,796
Federal Home Loan Bank stock	2,010
Loans receivable	171,593
Accrued interest receivable	679
Office properties and equipment, net	5,774
Bank-owned life insurance	17,245
Deferred tax assets, net	1,334
Other assets	1,489
Total assets acquired	422,065
Liabilities assumed:
Deposits	333,234
Borrowings	37,728
Advance payments by borrowers for taxes and insurance	982
Accrued expenses and other liabilities	5,400
Total liabilities assumed	377,344
Net assets acquired	44,721
Fair market value of stock issued to Columbia Bank MHC for purchase	68,530
Goodwill	$ 23,809	$ 18,700

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Debt Securities Available for Sale - Securities Available-for-Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,277,511	$ 1,086,143
Gross Unrealized Gains	40,748	14,248
Gross Unrealized (Losses)	(1,307)	(2,055)
Fair Value	1,316,952	1,098,336
U.S. government and agency obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	24,425	42,081
Gross Unrealized Gains	1,124	321
Gross Unrealized (Losses)	0	(16)
Fair Value	25,549	42,386
Mortgage-backed securities and collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,163,613	968,165
Gross Unrealized Gains	37,343	12,981
Gross Unrealized (Losses)	(562)	(1,265)
Fair Value	1,200,394	979,881
Municipal obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	16,845	2,284
Gross Unrealized Gains	17	1
Gross Unrealized (Losses)	0	(1)
Fair Value	16,862	2,284
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	67,628	68,613
Gross Unrealized Gains	2,264	945
Gross Unrealized (Losses)	(415)	(378)
Fair Value	69,477	69,180
Trust preferred securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,000	5,000
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	(330)	(395)
Fair Value	$ 4,670	$ 4,605

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Debt Securities Available for Sale - Expected Maturities of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Amortized Cost
Amortized Cost	$ 1,277,511	$ 1,086,143
Fair Value
Fair Value	1,316,952	1,098,336
Debt Securities excluding Mortgage-based securities and CMOs
Amortized Cost
One year or less	21,378
More than one year to five years	47,429
More than five years to ten years	45,091
Amortized Cost	113,898
Fair Value
One year or less	21,380
More than one year to five years	49,276
More than five years to ten years	45,902
Fair Value	116,558
Mortgage-backed securities and collateralized mortgage obligations
Amortized Cost
Amortized Cost	1,163,613	968,165
Fair Value
Fair Value	$ 1,200,394	$ 979,881

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Debt Securities Available for Sale - Narrative (Details)	12 Months Ended
	Dec. 31, 2020 USD ($) security	Dec. 31, 2019 USD ($) security	Dec. 31, 2018 USD ($)
Debt Securities, Available-for-sale [Line Items]
Amortized cost	$ 1,277,511,000	$ 1,086,143,000
Debt securities available for sale, at fair value	1,316,952,000	1,098,336,000
Proceeds from sales of debt securities available for sale	20,761,000	65,198,000	$ 11,513,000
Debt securities, available-for-sale securities, gross realized gains	369,000	2,200,000	116,000
Debt securities, available-for-sale, realized loss	0	22,000	0
Proceeds from calls and maturities of debt securities, available-for-sale	11,600,000	24,100,000	11,500,000
Calls of debt securities, available-for-sale, realized gain	1,000	174,000
Calls of debt securities, available-for-sale, unrealized loss	0	0
Proceeds from sale and maturity of debt securities, available for sale	10,900,000	$ 797,000	2,400,000
Debt securities, available-for-sale, number of matured debt securities | security		1
Debt securities, available-for-sale, restricted	$ 822,200,000	$ 462,000,000.0
Number of unrealized loss positions | security	40	97
Other-than-temporary impairment loss, debt securities, available for sale	$ 0	$ 0	$ 0
Mortgage-backed securities and collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized cost	1,163,613,000	968,165,000
Debt securities available for sale, at fair value	$ 1,200,394,000	$ 979,881,000

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Debt Securities Available for Sale - Continuous Unrealized Loss Position of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Less Than 12 Months
Fair Value	$ 127,823	$ 187,055
Gross Unrealized (Losses)	(636)	(965)
12 Months or Longer
Fair Value	34,428	72,428
Gross Unrealized (Losses)	(671)	(1,090)
Total
Fair Value	162,251	259,483
Gross Unrealized (Losses)	(1,307)	(2,055)
U.S. government and agency obligations
Less Than 12 Months
Fair Value		5,106
Gross Unrealized (Losses)		(13)
12 Months or Longer
Fair Value		4,988
Gross Unrealized (Losses)		(3)
Total
Fair Value		10,094
Gross Unrealized (Losses)		(16)
Mortgage-backed securities and collateralized mortgage obligations
Less Than 12 Months
Fair Value	117,978	178,665
Gross Unrealized (Losses)	(481)	(946)
12 Months or Longer
Fair Value	24,018	58,208
Gross Unrealized (Losses)	(81)	(319)
Total
Fair Value	141,996	236,873
Gross Unrealized (Losses)	(562)	(1,265)
Municipal obligations
Less Than 12 Months
Fair Value		696
Gross Unrealized (Losses)		(1)
12 Months or Longer
Fair Value		0
Gross Unrealized (Losses)		0
Total
Fair Value		696
Gross Unrealized (Losses)		(1)
Corporate debt securities
Less Than 12 Months
Fair Value	9,845	2,588
Gross Unrealized (Losses)	(155)	(5)
12 Months or Longer
Fair Value	5,740	4,627
Gross Unrealized (Losses)	(260)	(373)
Total
Fair Value	15,585	7,215
Gross Unrealized (Losses)	(415)	(378)
Trust preferred securities
Less Than 12 Months
Fair Value	0	0
Gross Unrealized (Losses)	0	0
12 Months or Longer
Fair Value	4,670	4,605
Gross Unrealized (Losses)	(330)	(395)
Total
Fair Value	4,670	4,605
Gross Unrealized (Losses)	$ (330)	$ (395)

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Debt Securities Held-to-Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 262,720	$ 285,756
Gross Unrealized Gains	14,373	4,074
Gross Unrealized (Losses)	(2)	(325)
Fair Value	277,091	289,505
U.S. government and agency obligations
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	5,000	20,000
Gross Unrealized Gains	1	26
Gross Unrealized (Losses)	0	(66)
Fair Value	5,001	19,960
Mortgage-backed securities and collateralized mortgage obligations
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	257,720	265,756
Gross Unrealized Gains	14,372	4,048
Gross Unrealized (Losses)	(2)	(259)
Fair Value	$ 272,090	$ 269,545

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Debt Securities Held to Maturity - Expected Maturities of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Amortized cost
More than one year to five years	$ 5,000
Amortized Cost	262,720	$ 285,756
Fair value
More than one year to five years	5,001
Debt securities held to maturity	277,091	289,505
Mortgage-backed securities and collateralized mortgage obligations
Amortized cost
Mortgage-backed securities and collateralized mortgage obligations	257,720
Amortized Cost	257,720	265,756
Fair value
Mortgage-backed securities and collateralized mortgage obligations	272,090
Debt securities held to maturity	$ 272,090	$ 269,545

XML

Debt Securities Held to Maturity - Narrative (Details)	12 Months Ended
	Dec. 31, 2020 USD ($) security	Dec. 31, 2019 USD ($) security	Dec. 31, 2018 USD ($)
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, held-to-maturity, amortized cost	$ 262,720,000	$ 285,756,000
Debt securities, held-to-maturity, fair value	277,091,000	289,505,000
Proceeds from sale of held-to-maturity securities	0	0	$ 0
Proceeds from calls and maturities of debt securities held to maturity	20,000,000.0	33,400,000	5,400,000
Debt securities, held-to-maturity, realized gain	0		0
Debt securities, held-to-maturity, sold, realized gain		24,000
Debt securities, held-to-maturity, sold, realized loss		0
Securities available-for-sale sold under agreements	$ 220,500,000	$ 236,000,000.0
Number of unrealized loss positions | security	2	22
Other-than-temporary impairment loss, debt securities, held-to-maturity, before tax	$ 0	$ 0	$ 0
Mortgage-backed securities and collateralized mortgage obligations
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, held-to-maturity, amortized cost	257,720,000	265,756,000
Debt securities, held-to-maturity, fair value	$ 272,090,000	$ 269,545,000

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Debt Securities Held to Maturity - Continuous Unrealized Loss Position of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Less Than 12 Months
Fair Value	$ 2,176	$ 37,845
Gross Unrealized (Losses)	(2)	(317)
12 Months or Longer
Fair Value	0	772
Gross Unrealized (Losses)	0	(8)
Total
Fair Value	2,176	38,617
Gross Unrealized (Losses)	$ (2)	(325)
U.S. government and agency obligations
Less Than 12 Months
Fair Value		9,934
Gross Unrealized (Losses)		(66)
12 Months or Longer
Fair Value		0
Gross Unrealized (Losses)		0
Total
Fair Value		9,934
Gross Unrealized (Losses)		(66)
Mortgage-backed securities and collateralized mortgage obligations
Less Than 12 Months
Fair Value		27,911
Gross Unrealized (Losses)		(251)
12 Months or Longer
Fair Value		772
Gross Unrealized (Losses)		(8)
Total
Fair Value		28,683
Gross Unrealized (Losses)		$ (259)

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Equity Securities at Fair Value - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Debt and Equity Securities, FV-NI [Line Items]
Equity securities, at fair value	$ 5,418,000	$ 2,855,000
Stockholders' equity	1,011,287,000	982,517,000	$ 972,060,000	$ 472,070,000
Increase (decrease) in fair value of equity securities	767,000	305,000	0
Proceeds from sale of equity securities	0	1,100,000
Gross realized gain in equity securities		236,000
Gross realized losses in equity securities		0
Cumulative Effect, Period of Adoption, Adjustment
Debt and Equity Securities, FV-NI [Line Items]
Stockholders' equity			0
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-01
Debt and Equity Securities, FV-NI [Line Items]
Equity securities, at fair value		1,900,000
Retained Earnings
Debt and Equity Securities, FV-NI [Line Items]
Stockholders' equity	673,084,000	615,481,000	560,216,000	537,480,000
Retained Earnings | Cumulative Effect, Period of Adoption, Adjustment
Debt and Equity Securities, FV-NI [Line Items]
Stockholders' equity			548,000
Retained Earnings | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-01
Debt and Equity Securities, FV-NI [Line Items]
Stockholders' equity		548,000	548,000
Accumulated Other Comprehensive (Loss)
Debt and Equity Securities, FV-NI [Line Items]
Stockholders' equity	$ (69,625,000)	$ (68,735,000)	(71,897,000)	$ (65,410,000)
Accumulated Other Comprehensive (Loss) | Cumulative Effect, Period of Adoption, Adjustment
Debt and Equity Securities, FV-NI [Line Items]
Stockholders' equity			(548,000)
Accumulated Other Comprehensive (Loss) | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-01
Debt and Equity Securities, FV-NI [Line Items]
Stockholders' equity			$ (548,000)

XML

Loans Receivable and Allowance for Loan Losses - Loans Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	$ 6,168,892	$ 6,176,329
Net deferred loan costs, fees and purchased premiums and discounts	12,878	21,237
Loans receivable	6,181,770	6,197,566
Real estate loans | One-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	1,940,636	2,077,508
Real estate loans | Multifamily and commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	2,822,858	2,924,851
Real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	328,711	298,942
Commercial business loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	754,013	484,941
Consumer loans | Home equity loans and advances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	321,177	388,127
Consumer loans | Other consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	1,497	1,960
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	6,162,547	6,169,308
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	1,940,327	2,077,079
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	2,817,965	2,919,985
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	328,711	298,942
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	752,870	483,215
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	321,177	388,127
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	1,497	1,960
Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	6,345	7,021
Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	309	429
Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	4,893	4,866
Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	0	0
Financial Asset Acquired with Credit Deterioration | Commercial business loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	1,143	1,726
Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	0	0
Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	$ 0	$ 0

XML

Loans Receivable and Allowance for Loan Losses - Narrative (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2020 loan	Dec. 31, 2020 USD ($) loan	Dec. 31, 2019 USD ($) loan	Dec. 31, 2018 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held-for-sale		$ 4,100,000	$ 0
Proceeds from sales of loans held-for-sale		111,764,000	101,946,000	$ 3,615,000
Gain on sale of loans held-for-sale			718,000
Loss on sale of loans held-for-sale			0
Gain on sale of loans held-for-investment		161,000	67,000
Loss on sale of loans held-for-investment		0	0
Purchases and grants of loans receivable		0	89,774,000	32,251,000
Loans receivable		6,181,770,000	6,197,566,000
Carrying value of servicing liability		598,000,000.0	526,300,000
Servicing income		1,400,000	1,200,000	1,100,000
Proceeds from sales of loans receivable		$ 35,613,000	$ 11,671,000	32,039,000
Threshold period, past due status of financing receivables		30 days
Threshold period, past due for nonperforming status of financing receivables		90 days	90 days
Non-accrual loans		$ 8,200,000	$ 6,700,000
Increase in interest income if non-accrual had performed in line with their original terms		426,000	509,000	126,000
Cash basis interest income on non-accrual loans		410,000	437,000	89,000
Loans past due		0	0
Property acquired through foreclosure		$ 0	$ 0
Number of loans in the process of foreclosure | loan		2	4
Loans in process of foreclosure		$ 398,000	$ 522,000
Loan threshold for individual evaluation for impairment		500,000
Specific allowance for loan losses attributable to impaired loans		1,088,000	1,621,000
Impaired loans for which there are no related allowance for loan losses		19,061,000	10,747,000
Investment in troubled debt restructuring		$ 45,400,000	$ 20,000,000.0	$ 16,000,000.0
Number of loans in troubled debt restructuring | loan		7	1	7
Less Than 90 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans		$ 2,200,000	$ 1,500,000
Number of loans in non-accrual status | loan	8	19
90 Days or More
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investment in troubled debt restructuring		$ 91,000		$ 101,000
Number of loans in troubled debt restructuring | loan		1	0	1
30-59 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investment in troubled debt restructuring		$ 11,900,000	$ 660,000	$ 1,000,000.0
Number of loans in troubled debt restructuring | loan		3	3	7
Related Parties
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases and grants of loans receivable		$ 300,000	$ 0	$ 0
Loans receivable		$ 1,600,000	1,100,000
Number of loans granted to related party | loan		1
Freddie Mac
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales of loans receivable		$ 117,300,000	21,600,000	0
Gain on sale of loans receivable		3,500,000
Loss on sale of loans receivable		0
Real estate loans | One-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales of loans held-for-sale		111,800,000	97,400,000	3,600,000
Gain on sale of loans held-for-sale		1,700,000
Loss on sale of loans held-for-sale		0
Gain (loss) on sale of loans held-for-sale				0
Proceeds from sale of loans held-for-investment		15,100,000	5,300,000	32,000,000.0
Gain on sale of loans held-for-investment				618,000
Loss on sale of loans held-for-investment				$ 0
Purchases and grants of loans receivable			89,800,000
Specific allowance for loan losses attributable to impaired loans		391,000	484,000
Impaired loans for which there are no related allowance for loan losses		3,344,000	4,314,000
Number of loans in troubled debt restructuring | loan				5
Real estate loans | Multifamily and commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales of loans held-for-sale			4,300,000
Proceeds from sale of loans held-for-investment			5,500,000
Purchases and grants of loans receivable				$ 32,300,000
Specific allowance for loan losses attributable to impaired loans		601,000	2,000
Impaired loans for which there are no related allowance for loan losses		$ 13,058,000	$ 1,494,000
Number of loans in troubled debt restructuring | loan		5	0	1
Real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sale of loans held-for-investment		$ 13,000,000.0
Commercial business loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales of loans held-for-sale			$ 164,000
Proceeds from sale of loans held-for-investment		7,600,000	901,000
Specific allowance for loan losses attributable to impaired loans		84,000	1,121,000
Impaired loans for which there are no related allowance for loan losses		$ 1,945,000	$ 3,859,000
Number of loans in troubled debt restructuring | loan		2	1
Commercial business loans | Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable		$ 344,400,000	$ 0
Financing receivable, unamortized loan fee (cost)		$ 6,600,000

XML

Loans Receivable and Allowance for Loan Losses - Aging of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Non-accrual	$ 8,200	$ 6,700
Total	6,168,892	6,176,329
Real estate loans | One-to-four family
Financing Receivable, Past Due [Line Items]
Total	1,940,636	2,077,508
Real estate loans | Multifamily and commercial
Financing Receivable, Past Due [Line Items]
Total	2,822,858	2,924,851
Real estate loans | Construction
Financing Receivable, Past Due [Line Items]
Total	328,711	298,942
Commercial business loans
Financing Receivable, Past Due [Line Items]
Total	754,013	484,941
Consumer loans | Home equity loans and advances
Financing Receivable, Past Due [Line Items]
Total	321,177	388,127
Consumer loans | Other consumer loans
Financing Receivable, Past Due [Line Items]
Total	1,497	1,960
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Past Due [Line Items]
Total Past Due	31,416	18,478
Non-accrual	8,156	6,687
Current	6,122,975	6,144,143
Total	6,162,547	6,169,308
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | 30-59 Days
Financing Receivable, Past Due [Line Items]
Total Past Due	22,766	9,642
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | 60-89 Days
Financing Receivable, Past Due [Line Items]
Total Past Due	2,664	3,588
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | 90 Days or More
Financing Receivable, Past Due [Line Items]
Total Past Due	5,986	5,248
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family
Financing Receivable, Past Due [Line Items]
Total Past Due	5,881	10,019
Non-accrual	2,637	1,732
Current	1,931,809	2,065,328
Total	1,940,327	2,077,079
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family | 30-59 Days
Financing Receivable, Past Due [Line Items]
Total Past Due	3,068	6,249
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family | 60-89 Days
Financing Receivable, Past Due [Line Items]
Total Past Due	912	2,132
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family | 90 Days or More
Financing Receivable, Past Due [Line Items]
Total Past Due	1,901	1,638
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial
Financing Receivable, Past Due [Line Items]
Total Past Due	16,883	2,552
Non-accrual	1,873	716
Current	2,799,209	2,916,717
Total	2,817,965	2,919,985
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial | 30-59 Days
Financing Receivable, Past Due [Line Items]
Total Past Due	15,645	626
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial | 60-89 Days
Financing Receivable, Past Due [Line Items]
Total Past Due	0	1,210
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial | 90 Days or More
Financing Receivable, Past Due [Line Items]
Total Past Due	1,238	716
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction
Financing Receivable, Past Due [Line Items]
Total Past Due	550	0
Non-accrual	0	0
Current	328,161	298,942
Total	328,711	298,942
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction | 30-59 Days
Financing Receivable, Past Due [Line Items]
Total Past Due	550	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction | 60-89 Days
Financing Receivable, Past Due [Line Items]
Total Past Due	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction | 90 Days or More
Financing Receivable, Past Due [Line Items]
Total Past Due	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans
Financing Receivable, Past Due [Line Items]
Total Past Due	5,852	3,545
Non-accrual	2,968	3,686
Current	744,050	475,984
Total	752,870	483,215
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans | 30-59 Days
Financing Receivable, Past Due [Line Items]
Total Past Due	2,343	1,056
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans | 60-89 Days
Financing Receivable, Past Due [Line Items]
Total Past Due	1,056	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans | 90 Days or More
Financing Receivable, Past Due [Line Items]
Total Past Due	2,453	2,489
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances
Financing Receivable, Past Due [Line Items]
Total Past Due	2,246	2,359
Non-accrual	678	553
Current	318,253	385,215
Total	321,177	388,127
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances | 30-59 Days
Financing Receivable, Past Due [Line Items]
Total Past Due	1,156	1,708
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances | 60-89 Days
Financing Receivable, Past Due [Line Items]
Total Past Due	696	246
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances | 90 Days or More
Financing Receivable, Past Due [Line Items]
Total Past Due	394	405
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans
Financing Receivable, Past Due [Line Items]
Total Past Due	4	3
Non-accrual	0	0
Current	1,493	1,957
Total	1,497	1,960
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans | 30-59 Days
Financing Receivable, Past Due [Line Items]
Total Past Due	4	3
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans | 60-89 Days
Financing Receivable, Past Due [Line Items]
Total Past Due	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans | 90 Days or More
Financing Receivable, Past Due [Line Items]
Total Past Due	$ 0	$ 0

XML

Loans Receivable and Allowance for Loan Losses - PCI Loans Acquired (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Apr. 01, 2020	Dec. 31, 2019	Nov. 01, 2019	Dec. 31, 2018
Receivables [Abstract]
Contractually required principal and interest		$ 461		$ 9,286
Contractual cash flows not expected to be collected (non-accretable difference)		(237)		(1,823)
Expected cash flows to be collected		224		7,463
Interest component of expected cash flows (accretable yield)	$ 418	(51)	$ 511	(556)	$ 0
Fair value of acquired loans		$ 173		$ 6,907

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Loans Receivable and Allowance for Loan Losses - Accretable Yield for PCI Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	$ 511	$ 0
Acquisition	58	556
Accretion	(34)	(30)
Net change in expected cash flows	(117)	(15)
Balance at end of period	$ 418	$ 511

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Loans Receivable and Allowance for Loan Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for loan losses:
Total	$ 74,676	$ 61,709	$ 62,342	$ 58,178
Total loans:
Total	6,168,892	6,176,329
Real estate loans | One-to-four family
Allowance for loan losses:
Total	13,586	13,780	15,232	19,991
Total loans:
Total	1,940,636	2,077,508
Real estate loans | Multifamily and commercial
Allowance for loan losses:
Total	30,681	22,980	23,251	19,933
Total loans:
Total	2,822,858	2,924,851
Real estate loans | Construction
Allowance for loan losses:
Total	11,271	7,435	7,217	5,217
Total loans:
Total	328,711	298,942
Commercial business loans
Allowance for loan losses:
Total	17,384	15,836	14,176	8,275
Total loans:
Total	754,013	484,941
Consumer loans | Home equity loans and advances
Allowance for loan losses:
Total	1,748	1,669	2,458	4,576
Total loans:
Total	321,177	388,127
Consumer loans | Other consumer loans
Allowance for loan losses:
Total	6	9	$ 8	$ 8
Total loans:
Total	1,497	1,960
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Allowance for loan losses:
Individually evaluated for impairment	1,088	1,621
Collectively evaluated for impairment	73,588	60,088
Total loans:
Individually evaluated for impairment	45,147	18,811
Collectively evaluated for impairment	6,117,400	6,150,497
Total	6,162,547	6,169,308
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family
Allowance for loan losses:
Individually evaluated for impairment	391	484
Collectively evaluated for impairment	13,195	13,296
Total loans:
Individually evaluated for impairment	7,257	8,891
Collectively evaluated for impairment	1,933,070	2,068,188
Total	1,940,327	2,077,079
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial
Allowance for loan losses:
Individually evaluated for impairment	601	2
Collectively evaluated for impairment	30,080	22,978
Total loans:
Individually evaluated for impairment	32,792	2,599
Collectively evaluated for impairment	2,785,173	2,917,386
Total	2,817,965	2,919,985
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction
Allowance for loan losses:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	11,271	7,435
Total loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	328,711	298,942
Total	328,711	298,942
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans
Allowance for loan losses:
Individually evaluated for impairment	84	1,121
Collectively evaluated for impairment	17,300	14,715
Total loans:
Individually evaluated for impairment	3,447	5,178
Collectively evaluated for impairment	749,423	478,037
Total	752,870	483,215
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances
Allowance for loan losses:
Individually evaluated for impairment	12	14
Collectively evaluated for impairment	1,736	1,655
Total loans:
Individually evaluated for impairment	1,651	2,143
Collectively evaluated for impairment	319,526	385,984
Total	321,177	388,127
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans
Allowance for loan losses:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	6	9
Total loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	1,497	1,960
Total	1,497	1,960
Financial Asset Acquired with Credit Deterioration
Allowance for loan losses:
Total	0	0
Total loans:
Total	6,345	7,021
Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family
Allowance for loan losses:
Total	0	0
Total loans:
Total	309	429
Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial
Allowance for loan losses:
Total	0	0
Total loans:
Total	4,893	4,866
Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction
Allowance for loan losses:
Total	0	0
Total loans:
Total	0	0
Financial Asset Acquired with Credit Deterioration | Commercial business loans
Allowance for loan losses:
Total	0	0
Total loans:
Total	1,143	1,726
Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances
Allowance for loan losses:
Total	0	0
Total loans:
Total	0	0
Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans
Allowance for loan losses:
Total	0	0
Total loans:
Total	$ 0	$ 0

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Loans Receivable and Allowance for Loan Losses - Troubled Debt Restructuring (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) loan	Dec. 31, 2019 USD ($) loan	Dec. 31, 2018 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
No. of Loans | loan	7	1	7
Pre-modification Recorded Investment	$ 28,529	$ 4,095	$ 1,454
Post-modification Recorded Investment	$ 29,824	$ 4,095	$ 1,454
Real estate loans | One-to-four family
Financing Receivable, Troubled Debt Restructuring [Line Items]
No. of Loans | loan			5
Pre-modification Recorded Investment			$ 801
Post-modification Recorded Investment			$ 801
Real estate loans | Multifamily and commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
No. of Loans | loan	5	0	1
Pre-modification Recorded Investment	$ 17,022	$ 0	$ 65
Post-modification Recorded Investment	$ 17,022	$ 0	$ 65
Commercial business loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
No. of Loans | loan	2	1
Pre-modification Recorded Investment	$ 11,507	$ 4,095
Post-modification Recorded Investment	$ 12,802	$ 4,095
Consumer loans | Home equity loans and advances
Financing Receivable, Troubled Debt Restructuring [Line Items]
No. of Loans | loan			1
Pre-modification Recorded Investment			$ 588
Post-modification Recorded Investment			$ 588

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Loans Receivable and Allowance for Loan Losses - Rollforward of Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Allowance for loan losses:
Beginning balance				$ 61,709				$ 62,342				$ 58,178	$ 61,709	$ 62,342	$ 58,178
Provision charged	$ 627	$ 2,516	$ 5,736	9,568	$ 2,519	$ 1,157	$ 112	436	$ 777	$ 1,500	$ 2,400	2,000	18,447	4,224	6,677
Recoveries													823	496	707
Charge-offs													(6,303)	(5,353)	(3,220)
Ending balance	74,676				61,709				62,342				74,676	61,709	62,342
Real estate loans | One-to-four family
Allowance for loan losses:
Beginning balance				13,780				15,232				19,991	13,780	15,232	19,991
Provision charged													1,299	(429)	(4,503)
Recoveries													438	30	334
Charge-offs													(1,931)	(1,053)	(590)
Ending balance	13,586				13,780				15,232				13,586	13,780	15,232
Real estate loans | Multifamily and commercial
Allowance for loan losses:
Beginning balance				22,980				23,251				19,933	22,980	23,251	19,933
Provision charged													7,713	(178)	3,445
Recoveries													16	10	2
Charge-offs													(28)	(103)	(129)
Ending balance	30,681				22,980				23,251				30,681	22,980	23,251
Real estate loans | Construction
Allowance for loan losses:
Beginning balance				7,435				7,217				5,217	7,435	7,217	5,217
Provision charged													3,835	216	1,997
Recoveries													1	2	3
Charge-offs													0	0	0
Ending balance	11,271				7,435				7,217				11,271	7,435	7,217
Commercial business loans
Allowance for loan losses:
Beginning balance				15,836				14,176				8,275	15,836	14,176	8,275
Provision charged													5,360	5,250	7,860
Recoveries													308	404	240
Charge-offs													(4,120)	(3,994)	(2,199)
Ending balance	17,384				15,836				14,176				17,384	15,836	14,176
Consumer loans | Home equity loans and advances
Allowance for loan losses:
Beginning balance				1,669				2,458				4,576	1,669	2,458	4,576
Provision charged													239	(638)	(1,949)
Recoveries													60	50	122
Charge-offs													(220)	(201)	(291)
Ending balance	1,748				1,669				2,458				1,748	1,669	2,458
Consumer loans | Other consumer loans
Allowance for loan losses:
Beginning balance				$ 9				8				8	9	8	8
Provision charged													1	3	5
Recoveries													0	0	6
Charge-offs													(4)	(2)	(11)
Ending balance	$ 6				$ 9				8				$ 6	9	8
Unallocated
Allowance for loan losses:
Beginning balance								$ 0				$ 178		$ 0	178
Provision charged															(178)
Recoveries															0
Charge-offs															0
Ending balance									$ 0						$ 0

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Loans Receivable and Allowance for Loan Losses - Loans Individually Evaluated for Impairment (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Recorded Investment
With no allowance recorded	$ 19,061	$ 10,747
With a specific allowance recorded	26,086	8,064
Recorded investment	45,147	18,811
Unpaid Principal Balance
With no allowance recorded	19,788	12,929
With a specific allowance recorded	26,708	11,088
Unpaid principal balance	46,496	24,017
Specific Allowance
Specific allowance	1,088	1,621
Real estate loans | One-to-four family
Recorded Investment
With no allowance recorded	3,344	4,314
With a specific allowance recorded	3,913	4,577
Recorded investment	7,257	8,891
Unpaid Principal Balance
With no allowance recorded	3,898	5,473
With a specific allowance recorded	3,919	4,613
Unpaid principal balance	7,817	10,086
Specific Allowance
Specific allowance	391	484
Real estate loans | Multifamily and commercial
Recorded Investment
With no allowance recorded	13,058	1,494
With a specific allowance recorded	19,734	1,105
Recorded investment	32,792	2,599
Unpaid Principal Balance
With no allowance recorded	13,094	2,191
With a specific allowance recorded	20,350	1,105
Unpaid principal balance	33,444	3,296
Specific Allowance
Specific allowance	601	2
Commercial business loans
Recorded Investment
With no allowance recorded	1,945	3,859
With a specific allowance recorded	1,502	1,319
Recorded investment	3,447	5,178
Unpaid Principal Balance
With no allowance recorded	1,945	4,048
With a specific allowance recorded	1,502	4,307
Unpaid principal balance	3,447	8,355
Specific Allowance
Specific allowance	84	1,121
Consumer loans | Home equity loans and advances
Recorded Investment
With no allowance recorded	714	1,080
With a specific allowance recorded	937	1,063
Recorded investment	1,651	2,143
Unpaid Principal Balance
With no allowance recorded	851	1,217
With a specific allowance recorded	937	1,063
Unpaid principal balance	1,788	2,280
Specific Allowance
Specific allowance	$ 12	$ 14

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Loans Receivable and Allowance for Loan Losses - Interest Income on Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Recorded Investment
Average Recorded Investment	$ 38,519	$ 21,240	$ 19,357
Interest Income Recognized	1,712	1,203	891
Real estate loans | One-to-four family
Recorded Investment
Average Recorded Investment	7,946	8,811	10,224
Interest Income Recognized	305	434	445
Real estate loans | Multifamily and commercial
Recorded Investment
Average Recorded Investment	23,701	2,639	2,712
Interest Income Recognized	1,091	147	155
Real estate loans | Construction
Recorded Investment
Average Recorded Investment	0	850	0
Interest Income Recognized	0	0	0
Commercial business loans
Recorded Investment
Average Recorded Investment	4,963	6,378	3,060
Interest Income Recognized	216	479	118
Consumer loans | Home equity loans and advances
Recorded Investment
Average Recorded Investment	1,909	2,562	3,361
Interest Income Recognized	$ 100	$ 143	$ 173

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Loans Receivable and Allowance for Loan Losses - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	$ 6,168,892	$ 6,176,329
Real estate loans | One-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	1,940,636	2,077,508
Real estate loans | Multifamily and commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	2,822,858	2,924,851
Real estate loans | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	328,711	298,942
Commercial business loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	754,013	484,941
Consumer loans | Home equity loans and advances
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	321,177	388,127
Consumer loans | Other consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	1,497	1,960
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	6,162,547	6,169,308
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	6,084,247	6,115,500
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	47,514	25,313
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	30,786	28,495
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	1,940,327	2,077,079
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	1,935,032	2,072,878
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	404	419
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	4,891	3,782
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	2,817,965	2,919,985
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	2,758,905	2,900,286
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	40,392	4,724
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	18,668	14,975
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	328,711	298,942
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	328,711	298,942
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	752,870	483,215
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	740,010	454,183
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	6,718	20,170
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	6,142	8,862
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	321,177	388,127
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	320,092	387,251
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	1,085	876
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	1,497	1,960
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	1,497	1,960
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	$ 0	$ 0

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Office Properties and Equipment, net - Schedule of Office Properties and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Office property and equipment, gross	$ 133,141	$ 130,795
Less accumulated depreciation and amortization	57,167	57,828
Total office properties and equipment, net	75,974	72,967
Land
Property, Plant and Equipment [Line Items]
Office property and equipment, gross	10,174	11,069
Buildings
Property, Plant and Equipment [Line Items]
Office property and equipment, gross	31,523	27,340
Land and building improvements
Property, Plant and Equipment [Line Items]
Office property and equipment, gross	35,307	31,520
Leasehold improvements
Property, Plant and Equipment [Line Items]
Office property and equipment, gross	22,166	24,038
Furniture and equipment
Property, Plant and Equipment [Line Items]
Office property and equipment, gross	$ 33,971	$ 36,828

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Office Properties and Equipment, net - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 6.5	$ 4.9	$ 3.8
Land and building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, additions	$ 2.6	$ 1.3

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Leases - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Total lease liability	$ 20,072
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssets
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilities
Operating lease, weighted average remaining lease term	7 years 6 months
Operating lease, weighted average discount rate	2.26%
Lease, cost	$ 2,400
Operating lease commitments due, next twelve months		$ 4,900
Operating lease commitments due, 2021		4,500
Operating lease commitments due, 2022		4,000
Operating lease commitments due, 2023		3,500
Operating lease commitments due, 2024		2,700
Operating lease commitments due thereafter		$ 5,000
Minimum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, renewal term	3 years
Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, renewal term	10 years
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Operating lease, right-of-use asset			$ 22,200
Total lease liability			$ 23,300

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Leases - Operating Lease Payment Obligations (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Leases [Abstract]
2021	$ 4,010
2022	3,624
2023	3,310
2024	2,586
2025	1,914
Thereafter	6,620
Total undiscounted cash flows	22,064
Discount on cash flows	(1,992)
Total lease liability	$ 20,072

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Goodwill and Intangible Assets - Schedule of Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 80,285	$ 60,763
Finite-lived intangible assets	6,197
Goodwill and intangible assets	87,384	68,582
Core Deposits
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	6,197	7,245
Mortgage Servicing Rights
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	$ 902	$ 574

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Goodwill and Intangible Assets - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 1,048,000	$ 222,000	$ 0
Mortgage Servicing Rights
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	128,000	109,000	73,000
Core Deposits
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 1,000,000.0	$ 222,000	$ 0

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Goodwill and Intangible Assets - Schedule of Amortization of Core Deposit Intangibles (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items]
Total	$ 6,197
Core Deposits
Acquired Finite-Lived Intangible Assets [Line Items]
2021	1,024
2022	961
2023	892
2024	819
2025	737
Thereafter	1,764
Total	$ 6,197	$ 7,245

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Deposits - Schedule of Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Balance
Non-interest-bearing demand	$ 1,354,605	$ 958,442
Interest-bearing demand	2,189,164	1,720,383
Money market accounts	588,180	410,392
Savings and club deposits	688,309	543,480
Certificates of deposit	1,958,366	2,013,145
Total deposits	$ 6,778,624	$ 5,645,842
Weighted Average Rate
Interest-bearing demand	0.40%	1.03%
Money market accounts	0.36%	0.91%
Savings and club deposits	0.16%	0.15%
Certificates of deposit	1.44%	2.25%
Total deposits	0.59%	1.20%

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Deposits - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Time Deposits [Line Items]
Interest-bearing demand	$ 2,189,164	$ 1,720,383
Aggregate amount of certificates of deposit exceeding threshold amount	1,000,000	1,100,000
Stewardship Financial Corporation
Time Deposits [Line Items]
Interest-bearing demand	$ 26,300	$ 31,600

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Deposits - Schedule of Deposit Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deposits [Abstract]
One year or less	$ 1,494,129	$ 1,293,613
After one year to two years	337,579	548,995
After two years to three years	52,809	142,458
After three years to four years	23,018	11,362
After four years	50,831	16,717
Total term certificate accounts	$ 1,958,366	$ 2,013,145

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Deposits - Interest Expense on Deposits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets Sold under Agreements to Repurchase [Line Items]
Interest expense on deposits	$ 55,246	$ 61,551	$ 39,523
Demand (including money market accounts)
Assets Sold under Agreements to Repurchase [Line Items]
Interest expense on deposits	15,556	19,922	12,933
Savings and club deposits
Assets Sold under Agreements to Repurchase [Line Items]
Interest expense on deposits	1,023	770	993
Certificates of deposit
Assets Sold under Agreements to Repurchase [Line Items]
Interest expense on deposits	$ 38,667	$ 40,859	$ 25,597

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Borrowings - Schedule of borrowed funds (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Balance	$ 799,364,000	$ 1,407,022,000
Weighted Average Interest Rate	1.20%	2.14%
Overnight lines of credit
Debt Instrument [Line Items]
Balance	$ 0	$ 107,800,000
Weighted Average Interest Rate	0.00%	1.81%
FHLB advances
Debt Instrument [Line Items]
Balance	$ 792,412,000	$ 1,275,391,000
Weighted Average Interest Rate	1.18%	2.09%
Subordinated notes
Debt Instrument [Line Items]
Balance	$ 0	$ 16,899,000
Weighted Average Interest Rate	0.00%	6.75%
Junior subordinated debt
Debt Instrument [Line Items]
Balance	$ 6,952,000	$ 6,932,000
Weighted Average Interest Rate	3.20%	5.09%

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Borrowings - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Balance	$ 799,364,000	$ 1,407,022,000
Unused line of credit	250,000,000.0	250,000,000.0
Advances from federal home loan banks	2,100,000,000	1,900,000,000
Line of Credit
Debt Instrument [Line Items]
Balance	0	107,800,000
Interest expense, debt	425,000	1,800,000	$ 2,200,000
FHLB advances
Debt Instrument [Line Items]
Balance	792,412,000	1,275,391,000
Interest expense, debt	17,700,000	25,200,000	17,100,000
Junior subordinated debt
Debt Instrument [Line Items]
Balance	6,952,000	6,932,000
Interest expense, debt	$ 295,000	$ 65,000	3,500,000
Interest rate, effective percentage	3.20%	5.09%
Subordinated notes
Debt Instrument [Line Items]
Balance	$ 0	$ 16,899,000
Interest expense, debt	448,000	113,000	$ 0
Securities sold under agreements to repurchase
Debt Instrument [Line Items]
Advances from federal home loan banks	222,400,000	246,200,000
Interest rate swaps | FHLB advances
Debt Instrument [Line Items]
Notional amount of derivative	$ 430,000,000.0	$ 410,000,000.0
London Interbank Offered Rate (LIBOR) | Junior subordinated debt
Debt Instrument [Line Items]
Basis spread on variable rate	3.20%

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Borrowings - Schedule of contractual maturity of borrowings (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Total FHLB advances	$ 799,364	$ 1,407,022
Line of Credit and FHLB Advances
Debt Instrument [Line Items]
One year or less	496,042
After one year to two years	179,706
After two years to three years	40,391
After three years to four years	51,273
After four years	25,000
Total FHLB advances	$ 792,412

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Stockholders' Equity - Actual Capital Amounts and Ratios (Details) $ in Thousands	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Parent Company
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital conservation buffer, ratio	2.50%
Actual, Amount
Total capital	$ 1,070,361	$ 1,061,555
Tier one capital	998,172	988,172
Common equity tier one capital	990,955	980,995
Tier one leverage capital	$ 998,172	$ 988,172
Ratio, Actual
Capital to risk weighted assets	0.1854	0.1725
Tier one risk based capital to risk weighted assets	0.1729	0.1605
Common equity tier one capital	0.1717	0.1594
Tier one leverage capital to average assets	0.1138	0.1292
Minimum Capital Adequacy Requirements, Amount
Capital required for capital adequacy	$ 461,766	$ 492,438
Tier one risk based capital required for capital adequacy	346,325	369,328
Common equity tier one capital required for capital adequacy	259,744	276,996
Tier one leverage capital required for capital adequacy	$ 350,923	$ 305,824
Minimum Capital Adequacy Requirements, Ratio
Capital required for capital adequacy to risk weighted assets	0.0800	0.0800
Tier one risk based capital required for capital adequacy to risk weighted assets	0.0600	0.0600
Common equity tier one capital required for capital adequacy to risk weighted assets	0.045	0.0450
Tier one leverage capital required for capital adequacy to average assets	0.040	0.0400
Minimum Capital Adequacy Requirements With Capital Conservation Buffer, Amount
Capital required for capital adequacy with capital buffer	$ 606,068	$ 646,324
Tier one risk based capital required for capital adequacy with capital buffer	490,627	523,215
Common equity tier one risk based capital required for capital adequacy with capital buffer	404,046	430,883
Tier one leverage capital required for capital adequacy with capital buffer to average assets	$ 350,923	$ 305,824
Minimum Capital Adequacy Requirements With Capital Conservation Buffer, Ratio
Capital required for capital adequacy with capital buffer to risk weighted assets	0.1050	0.1050
Tier one risk based capital required for capital adequacy with capital buffer to risk weighted assets	0.0850	0.0850
Common equity tier one risk based capital requirement for capital adequacy with capital buffer to risk weighted assets	0.0700	0.0700
Tier one leverage capital requirement for capital adequacy with capital buffer to average assets	4.00%	4.00%
Subsidiaries
Actual, Amount
Total capital	$ 924,959	$ 844,664
Tier one capital	852,897	782,881
Common equity tier one capital	852,897	782,881
Tier one leverage capital	$ 852,897	$ 782,881
Ratio, Actual
Capital to risk weighted assets	0.1605	0.1425
Tier one risk based capital to risk weighted assets	0.1480	0.1321
Common equity tier one capital	0.1480	0.1321
Tier one leverage capital to average assets	0.0972	0.1025
Minimum Capital Adequacy Requirements, Amount
Capital required for capital adequacy	$ 460,944	$ 474,125
Tier one risk based capital required for capital adequacy	345,708	355,594
Common equity tier one capital required for capital adequacy	259,281	266,696
Tier one leverage capital required for capital adequacy	$ 350,815	$ 305,423
Minimum Capital Adequacy Requirements, Ratio
Capital required for capital adequacy to risk weighted assets	0.0800	0.0800
Tier one risk based capital required for capital adequacy to risk weighted assets	0.0600	0.0600
Common equity tier one capital required for capital adequacy to risk weighted assets	0.0450	0.0450
Tier one leverage capital required for capital adequacy to average assets	0.0400	0.0400
Minimum Capital Adequacy Requirements With Capital Conservation Buffer, Amount
Capital required for capital adequacy with capital buffer	$ 604,989	$ 622,290
Tier one risk based capital required for capital adequacy with capital buffer	489,753	503,758
Common equity tier one risk based capital required for capital adequacy with capital buffer	403,326	414,860
Tier one leverage capital required for capital adequacy with capital buffer to average assets	$ 350,815	$ 305,423
Minimum Capital Adequacy Requirements With Capital Conservation Buffer, Ratio
Capital required for capital adequacy with capital buffer to risk weighted assets	0.1050	0.1050
Tier one risk based capital required for capital adequacy with capital buffer to risk weighted assets	0.0850	0.0850
Common equity tier one risk based capital requirement for capital adequacy with capital buffer to risk weighted assets	0.0700	0.0700
Tier one leverage capital requirement for capital adequacy with capital buffer to average assets	4.00%	4.00%
To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount
Capital required to be well capitalized, amount	$ 576,180	$ 592,657
Tier one risk based capital required to be well capitalized, amount	460,944	474,125
Common equity tier one capital required to be well-capitalized, amount	374,517	385,227
Tier one leverage capital required to be well capitalized, amount	$ 438,519	$ 381,779
To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio
Capital required to be well capitalized to risk weighted assets, ratio	0.1000	0.1000
Tier one risk based capital required to be well capitalized to risk weighted assets, ratio	0.0800	0.0800
Common equity tier one capital required to be well-capitalized to risk weighted assets, ratio	0.0650	0.0650
Tier one leverage capital required to be well capitalized to average assets, ratio	0.0500	0.0500

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Stockholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands				12 Months Ended
	Sep. 10, 2020	Dec. 05, 2019	Jun. 13, 2019	Dec. 31, 2020	Dec. 31, 2019
Equity [Abstract]
Number of shares authorized to be repurchased (in shares)	5,000,000		4,000,000
Stock repurchase program, percent of common stock	4.30%		3.50%
Additional shares acquired in stock repurchase program (in shares)		3,000,000
Treasury stock, shares purchased (in shares)				7,587,142	3,543,800
Cost method of shares repurchase				$ 108,166	$ 55,309
Cost method of shares repurchased (in dollars per share)				$ 14.26	$ 15.61

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Employee Benefit Plans - Schedule of Change in Benefit Obligation and Plan Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Plan
Change in benefit obligation:
Benefit obligation, beginning balance	$ 263,826	$ 209,205
Acquired	0	0
Service cost	7,985	6,494	$ 7,805
Interest cost	7,608	8,569	8,489
Actuarial (gain) loss	40,281	46,001
Benefits paid	(7,260)	(6,443)
Benefit obligation, ending balance	312,440	263,826	209,205
Change in plan assets:
Fair value of plan assets, beginning balance	356,347	272,974
Actuarial return on plan assets	50,820	54,816
Employer contributions	12,000	35,000
Benefits paid	(7,260)	(6,443)
Fair value of plan assets, ending balance	411,907	356,347	272,974
Funded status at end of year	99,467	92,521
RIM Plan
Change in benefit obligation:
Benefit obligation, beginning balance	13,696	11,285
Acquired	0	0
Service cost	267	210	282
Interest cost	405	466	443
Actuarial (gain) loss	2,506	2,074
Benefits paid	(344)	(339)
Benefit obligation, ending balance	16,530	13,696	11,285
Change in plan assets:
Fair value of plan assets, beginning balance	0	0
Actuarial return on plan assets	0	0
Employer contributions	344	339
Benefits paid	(344)	(339)
Fair value of plan assets, ending balance	0	0	0
Funded status at end of year	(16,530)	(13,696)
Post-retirement Plan
Change in benefit obligation:
Benefit obligation, beginning balance	24,603	20,964
Acquired	0	0
Service cost	394	339	417
Interest cost	683	826	796
Actuarial (gain) loss	5,506	3,141
Benefits paid	(565)	(667)
Benefit obligation, ending balance	30,621	24,603	20,964
Change in plan assets:
Fair value of plan assets, beginning balance	0	0
Actuarial return on plan assets	0	0
Employer contributions	565	667
Benefits paid	(565)	(667)
Fair value of plan assets, ending balance	0	0	0
Funded status at end of year	(30,621)	(24,603)
Split-Dollar Life Insurance
Change in benefit obligation:
Benefit obligation, beginning balance	14,100	10,462
Acquired	1,981	310
Service cost	467	354	374
Interest cost	507	457	428
Actuarial (gain) loss	3,137	2,649
Benefits paid	(211)	(132)
Benefit obligation, ending balance	19,981	14,100	10,462
Change in plan assets:
Fair value of plan assets, beginning balance	0	0
Actuarial return on plan assets	0	0
Employer contributions	211	132
Benefits paid	(211)	(132)
Fair value of plan assets, ending balance	0	0	$ 0
Funded status at end of year	$ (19,981)	$ (14,100)

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Employee Benefit Plans - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Apr. 30, 2018	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Bank-owned life insurance			$ 232,824	$ 211,415
Bank-owned life insurance income		$ 5,200	6,620	5,846	$ 5,208
Employee stock ownership plan, compensation expense			$ 3,161	$ 3,566	$ 2,594
Exercises in period (in shares)			0	0	0
RIM Plan
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, funded (unfunded) status of plan			$ (16,530)	$ (13,696)
Defined contribution plan, cost			4	11	$ 9
Employee stock ownership plan, compensation expense			215	267	165
Defined benefit plan, net periodic benefit cost (credit)			1,069	920	1,138
RIM Plan | Roselle Entities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, net periodic benefit cost (credit)			11
Post-retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, funded (unfunded) status of plan			(30,621)	(24,603)
Defined benefit plan, net periodic benefit cost (credit)			1,386	1,312	1,430
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, funded (unfunded) status of plan			99,467	92,521
Defined contribution plan, cost			1,700	1,400	1,300
Defined benefit plan, net periodic benefit cost (credit)			$ (2,880)	(2,925)	(1,383)
Maximum
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, employer matching contribution, percent of match			4.50%
Maximum | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, employer matching contribution, percent of match			4.50%
Minimum
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, employer matching contribution, percent of match			3.00%
Minimum | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, employer matching contribution, percent of match			3.00%
Columbia Bank Employee Stock Ownership Plan
Defined Benefit Plan Disclosure [Line Items]
Proceeds from repayments of loans by employee stock ownership plans	$ 45,400
Loan term	20 years		20 years
Shares contributed to ESOP (in shares)	4,542,855
Fixed interest rate	4.75%
Employee stock ownership plan, compensation expense			$ 3,200	$ 3,600	$ 2,600

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Employee Benefit Plans - Schedule of Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Unrecognized prior service costs	$ 0	$ 0	$ 0
Unrecognized net actuarial income	76,686	68,752	59,579
Total accumulated other comprehensive income	76,686	68,752	59,579
RIM Plan
Defined Benefit Plan Disclosure [Line Items]
Unrecognized prior service costs	0	0	0
Unrecognized net actuarial income	7,686	5,777	3,748
Total accumulated other comprehensive income	7,686	5,777	3,748
Post-retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Unrecognized prior service costs	0	0	0
Unrecognized net actuarial income	12,417	7,221	4,226
Total accumulated other comprehensive income	12,417	7,221	4,226
Split-Dollar Life Insurance
Defined Benefit Plan Disclosure [Line Items]
Unrecognized prior service costs	405	461	517
Unrecognized net actuarial income	8,741	6,058	3,658
Total accumulated other comprehensive income	$ 9,146	$ 6,519	$ 4,175

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Employee Benefit Plans - Schedule of Net Periodic Benefit Cost (Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 7,985	$ 6,494	$ 7,805
Interest cost	7,608	8,569	8,489
Expected return on plan assets	(23,375)	(21,058)	(20,794)
Amortization of Prior service cost	0	0	0
Amortization of Net loss	4,902	3,070	3,117
Net periodic (income) benefit cost	(2,880)	(2,925)	(1,383)
RIM Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	267	210	282
Interest cost	405	466	443
Expected return on plan assets	0	0	0
Amortization of Prior service cost	0	0	0
Amortization of Net loss	397	244	413
Net periodic (income) benefit cost	1,069	920	1,138
Post-retirement Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	394	339	417
Interest cost	683	826	796
Expected return on plan assets	0	0	0
Amortization of Prior service cost	0	0	(106)
Amortization of Net loss	309	147	323
Net periodic (income) benefit cost	1,386	1,312	1,430
Split-Dollar Life Insurance
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	467	354	374
Interest cost	507	457	428
Expected return on plan assets	0	0	0
Amortization of Prior service cost	56	56	32
Amortization of Net loss	454	247	506
Net periodic (income) benefit cost	$ 1,484	$ 1,114	$ 1,340

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Employee Benefit Plans - Retrospective Application of the Statement of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Compensation and employee benefits	$ 100,687	$ 84,256	$ 77,226
Other non-interest expense	$ 21,499	$ 11,769	5,597
Accounting Standards Update 2017-07
Defined Benefit Plan Disclosure [Line Items]
Compensation and employee benefits			77,226
Other non-interest expense			5,597
Accounting Standards Update 2017-07 | Previously Reported
Defined Benefit Plan Disclosure [Line Items]
Compensation and employee benefits			69,907
Other non-interest expense			$ 12,916

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Employee Benefit Plans - Schedule of Weighted Average Actuarial Assumptions (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.92%	3.49%	4.57%
Rate of compensation increase	3.75%	3.50%	3.50%
Benefit obligation	3.49%	4.57%	3.75%
Remeasurement rate	2.74%	3.85%
Service cost	3.66%	4.70%
Remeasurement rate	2.97%	4.04%
Interest cost	3.12%	4.25%
Remeasurement rate	2.22%	3.44%
Expected rate of return on plan assets	6.50%	7.00%	7.25%
Rate of compensation increase	3.50%	3.50%	3.50%
RIM Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.67%	3.33%	4.47%
Rate of compensation increase	3.75%	3.50%	3.50%
Benefit obligation	3.33%	4.47%	4.47%
Service cost	3.46%	4.57%	4.57%
Interest cost	3.00%	4.18%	4.18%
Rate of compensation increase	3.50%	3.50%	3.50%
Post-retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.59%	3.27%	4.41%
Benefit obligation	3.27%	4.41%	3.625%
Service cost	3.52%	4.60%
Interest cost	2.85%	4.05%
Split-Dollar Life Insurance
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.01%	3.54%	4.63%
Rate of compensation increase	3.75%	3.50%	3.50%
Benefit obligation	3.54%	4.63%	3.75%
Service cost	3.71%	4.74%
Interest cost	3.28%	4.39%
Rate of compensation increase	3.50%	3.50%	3.50%

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Employee Benefit Plans - Schedule of Assumed Health Care Cost Trend Rates (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Retirement Benefits [Abstract]
Effect on total service cost and interest cost, increase	$ 19
Effect on post-retirement benefit obligations, increase	175
Effect on total service cost and interest cost, decrease	(16)
Effect on post-retirement benefit obligations, decrease	$ (154)

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Employee Benefit Plans - Schedule of Estimated Future Benefit Payments (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
2021	$ 8,568
2022	9,141
2023	9,847
2024	10,592
2025	11,388
2026 - 2030	68,978
RIM Plan
Defined Benefit Plan Disclosure [Line Items]
2021	384
2022	436
2023	534
2024	673
2025	778
2026 - 2030	4,415
Post-retirement Plan
Defined Benefit Plan Disclosure [Line Items]
2021	1,490
2022	1,525
2023	1,559
2024	1,622
2025	1,675
2026 - 2030	8,820
Split-Dollar Life Insurance
Defined Benefit Plan Disclosure [Line Items]
2021	270
2022	312
2023	363
2024	412
2025	461
2026 - 2030	$ 3,179

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Employee Benefit Plans - Schedule of Weighted Average and Target Allocations of Pension Assets (Details) - Pension Plan	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Weighted average assets allocations, percentage	100.00%	100.00%
Domestic equities
Defined Benefit Plan Disclosure [Line Items]
Weighted average assets allocations, percentage	44.10%	39.60%
Foreign equities
Defined Benefit Plan Disclosure [Line Items]
Weighted average assets allocations, percentage	13.40%	9.60%
Fixed income
Defined Benefit Plan Disclosure [Line Items]
Weighted average assets allocations, percentage	37.80%	44.30%
Commingled real estate funds
Defined Benefit Plan Disclosure [Line Items]
Weighted average assets allocations, percentage	4.40%	6.10%
Money market mutual funds
Defined Benefit Plan Disclosure [Line Items]
Weighted average assets allocations, percentage	0.30%	0.40%
Minimum | Equities
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation, percent	40.00%
Minimum | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation, percent	40.00%
Minimum | Commingled real estate funds
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation, percent	0.00%
Minimum | Money market mutual funds
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation, percent	0.00%
Maximum | Equities
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation, percent	60.00%
Maximum | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation, percent	60.00%
Maximum | Commingled real estate funds
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation, percent	10.00%
Maximum | Money market mutual funds
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation, percent	15.00%

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Employee Benefit Plans - Schedule of Fair Value of Plan Assets (Details) - Pension Plan - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 411,907	$ 356,347	$ 272,974
Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	393,948	334,751
Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	17,959	21,596
Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Money market mutual funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,434	1,462
Money market mutual funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,434	1,462
Money market mutual funds | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Money market mutual funds | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Mutual funds - value stock fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	29,914	27,827
Mutual funds - value stock fund | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	29,914	27,827
Mutual funds - value stock fund | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Mutual funds - value stock fund | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Mutual funds - fixed income
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	155,864	158,030
Mutual funds - fixed income | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	155,864	158,030
Mutual funds - fixed income | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Mutual funds - fixed income | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Mutual funds - international stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	55,300	34,332
Mutual funds - international stock | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	55,300	34,332
Mutual funds - international stock | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Mutual funds - international stock | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Mutual funds - institutional stock index
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	151,436	113,100
Mutual funds - institutional stock index | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	151,436	113,100
Mutual funds - institutional stock index | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Mutual funds - institutional stock index | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Commingled real estate funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	17,959	21,596
Commingled real estate funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Commingled real estate funds | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	17,959	21,596
Commingled real estate funds | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0	$ 0

XML

Employee Benefit Plans - Schedule of Employee Stock Ownership Plan (Details) - USD ($) shares in Thousands, $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Allocated shares (in shares)	606	385
Unearned shares (in shares)	3,929	4,156
Total ESOP shares (in shares)	4,535	4,541
Fair value of unearned ESOP shares	$ 61,139	$ 70,409

XML

Employee Benefit Plans - Stock Based Compensation Narrative (Details) - USD ($)				12 Months Ended
	Dec. 14, 2020	Dec. 16, 2019	Jul. 23, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jun. 06, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)							7,949,996
Grants in period (in shares)		184,378	3,707,901	10,457	3,892,279
Grants in period (in dollars per share)		$ 4.59	$ 4.25
Grants in period (in dollars per share)		$ 17.00	$ 15.60	$ 15.98	$ 15.60
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)							2,271,427
Equity instruments other than options, grants in period (in shares)	33,160	74,673	1,389,570	33,160	1,464,243
Equity instruments other than options, grants in period (in dollars per share)	$ 15.08	$ 17.00	$ 15.60	$ 15.08	$ 15.67
Share-based payment expense				$ 5,600,000	$ 2,300,000	$ 0
Equity instrument other than options, nonvested (in shares)				1,263,169	1,420,012	0
Nonvested award, excluding option, cost not yet recognized				$ 14,600,000
Cost not yet recognized, period for recognition				3 years
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)							5,678,569
Award vesting period (in years)		5 years	5 years
Share-based payment expense				$ 3,200,000	$ 1,400,000	$ 0
Equity instrument other than options, nonvested (in shares)				2,965,330
Nonvested award, excluding option, cost not yet recognized				$ 11,300,000
Cost not yet recognized, period for recognition				3 years 7 months 6 days
Expiration period (in years)		10 years	10 years
Expected term		6 years 6 months	6 years 6 months
Risk free interest rate		1.79%	1.90%
Expected volatility rate		22.23%	22.12%
Expected dividend rate		0.00%	0.00%
Minimum | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)				1 year
Maximum | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)				5 years
Share-based Payment Arrangement, Tranche One | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)				1 year
Share-based Payment Arrangement, Tranche One | Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)		1 year	1 year

XML

Employee Benefit Plans - Restricted Stock Activity (Details) - $ / shares				12 Months Ended
	Dec. 14, 2020	Dec. 16, 2019	Jul. 23, 2019	Dec. 31, 2020	Dec. 31, 2019
Number of Restricted Shares
Vested (in shares)				(172,756)
Weighted Average Grant Date Fair Value
Vested (in dollars per share)				$ 15.66
Restricted Stock
Number of Restricted Shares
Beginning balance (in shares)				1,420,012	0
Granted (in shares)	33,160	74,673	1,389,570	33,160	1,464,243
Forfeited (in shares)				(17,247)	(44,231)
Ending balance (in shares)				1,263,169	1,420,012
Weighted Average Grant Date Fair Value
Beginning balance (in dollars per share)				$ 15.67	$ 0
Granted (in dollars per share)	$ 15.08	$ 17.00	$ 15.60	15.08	15.67
Forfeited (in dollars per share)				16.02	15.60
Ending balance (in dollars per share)				$ 15.66	$ 15.67

XML

Employee Benefit Plans - Stock Option Activity (Details) - USD ($)			12 Months Ended
	Dec. 16, 2019	Jul. 23, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Number of Stock Options
Beginning balance (in shares)			3,784,044	0
Granted (in shares)	(184,378)	(3,707,901)	(10,457)	(3,892,279)
Forfeited (in shares)			(64,959)	(108,235)
Ending balance (in shares)			3,708,628	3,784,044
Options exercisable (in shares)			743,298
Weighted Average Exercise Price
Beginning balance (in dollars per share)			$ 15.67	$ 0
Granted (in dollars per share)	$ 17.00	$ 15.60	15.98	15.60
Forfeited (in dollars per share)			15.84
Ending balance (in dollars per share)			15.66	$ 15.67
Options exercisable (in dollars per share)			$ 15.66
Weighted Average Remaining Contractual Term (in years)
Granted				9 years 7 months 6 days
Outstanding			8 years 7 months 6 days	9 years 7 months 6 days
Options exercisable			8 years 6 months
Aggregate Intrinsic Value
Outstanding			$ 0	$ 4,812,490	$ 0

XML

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Contingency [Line Items]
Deferred income tax expense (benefit), related to unrealized gain (losses) on available-for-sale securities	$ (5,600)	$ (5,500)	$ 1,400
Reclassification adjustment of actuarial net (loss) gain included in net income	900	779	(530)
Deferred tax expense (benefit)	9,738	7,527	$ (5,490)
Included in retained earnings, no provision for income tax	21,500	21,500
Valuation allowance	3,411	7,442
Operating loss carryforwards	108,400	99,800
Stewardship Financial Corporation
Income Tax Contingency [Line Items]
Deferred tax expense (benefit)	5,400	2,300
Operating loss carryforwards		$ 5,800
Operating loss carryforwards, net	1,100
Deferred tax assets, operating loss carryforwards, subject to expiration	1,000
Roselle Entities
Income Tax Contingency [Line Items]
Operating loss carryforwards	11,900
New Jersey Division of Taxation
Income Tax Contingency [Line Items]
Tax credit carryforward, amount	$ 2,200

XML

Income Taxes - Schedule of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal													$ 5,072	$ 5,933	$ 11,284
State													3,844	2,905	5,129
Total current													8,916	8,838	16,413
Deferred:
Federal													9,847	8,275	(4,901)
State													(109)	(748)	(589)
Total deferred													9,738	7,527	(5,490)
Total income tax expense	$ 6,547	$ 5,252	$ 4,603	$ 2,252	$ 3,832	$ 5,392	$ 3,634	$ 3,507	$ 3,123	$ 6,956	$ (2,961)	$ 3,805	$ 18,654	$ 16,365	$ 10,923

XML

Income Taxes - Schedule of Effective Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Tax expense at applicable statutory rate													$ 16,013	$ 14,927	$ 7,067
Increase (decrease) in taxes resulting from:
State tax, net of federal income tax benefit													2,951	1,704	3,587
ESOP fair market value adjustment													187	272	202
Tax exempt interest income													(11)	(6)	(4)
Income from Bank-owned life insurance													(1,075)	(1,246)	(812)
Dividend received deduction													(9)	(8)	(16)
Non-deductible merger-related expenses													42	222	0
Non-deductible compensation expense													0	398	0
Other, net													556	102	899
Total income tax expense	$ 6,547	$ 5,252	$ 4,603	$ 2,252	$ 3,832	$ 5,392	$ 3,634	$ 3,507	$ 3,123	$ 6,956	$ (2,961)	$ 3,805	$ 18,654	$ 16,365	$ 10,923

XML

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Allowance for loan losses	$ 20,878	$ 13,114
Post-retirement benefits	5,928	4,089
Deferred compensation	2,779	2,085
Depreciation	0	1,002
Retirement Income Maintenance plan	2,471	1,725
ESOP	624	301
Stock-based compensation	2,724	788
Reserve for uncollected interest	126	54
Net unrealized losses on debt securities and defined benefit plans	18,511	18,374
Federal and State NOLs	9,719	2,063
Alternative minimum assessment carryforwards	2,156	2,156
Charitable contribution carryforward	6,359	5,981
Purchase accounting	1,024	0
Lease liability	5,609
Other items	3,215	332
Gross deferred tax assets	82,123	58,999
Valuation allowance	(3,411)	(7,442)
Total deferred tax assets, net	78,712	51,557
Deferred tax liabilities:
Pension expense	49,225	33,856
Deferred Tax Liabilities, Depreciation	6,118	0
Deferred loan costs	8,555	5,911
Intangible assets	1,597	1,215
Deferred Tax Liabilities, Leasing Arrangements	5,317
Other items	716	266
Total gross deferred tax liabilities	71,528	41,248
Net deferred tax asset	$ 7,184	$ 10,309

XML

Financial Transactions with Off-Balance-Sheet Risk and Concentrations of Credit Risk - Schedule of Loan Commitments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Concentration Risk [Line Items]
Loan commitments	$ 282,198	$ 270,881
Residential real estate
Concentration Risk [Line Items]
Loan commitments	149,847	91,141
Multifamily and commercial
Concentration Risk [Line Items]
Loan commitments	98,910	95,025
Commercial business loans
Concentration Risk [Line Items]
Loan commitments	16,842	18,737
Construction
Concentration Risk [Line Items]
Loan commitments	13,335	59,990
Home equity loans and advances
Concentration Risk [Line Items]
Loan commitments	$ 3,264	$ 5,988

XML

Financial Transactions with Off-Balance-Sheet Risk and Concentrations of Credit Risk - Narrative (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Loss Contingencies [Line Items]
Derivative (liabilities), at fair value, net	$ (23,000,000.0)	$ (11,400,000)
Unused lines of Credit
Loss Contingencies [Line Items]
Fair value disclosure, off-balance sheet risk, amount, liability	894,500,000	910,000,000.0
Mortgages
Loss Contingencies [Line Items]
Fair value disclosure, off-balance sheet risk, amount, liability	0
Letter of Credit
Loss Contingencies [Line Items]
Fair value disclosure, off-balance sheet risk, amount, liability	$ 9,400,000	$ 8,400,000

XML

Fair Value Measurements - Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	$ 1,316,952	$ 1,098,336
Equity securities, at fair value	5,418	2,855
U.S. government and agency obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	25,549	42,386
Mortgage-backed securities and collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	1,200,394	979,881
Municipal obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	16,862	2,284
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	69,477	69,180
Trust preferred securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	4,670	4,605
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value		42,386
Equity securities, at fair value	5,072	2,587
Derivative assets	0	0
Derivative liabilities	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value		1,055,950
Equity securities, at fair value	346	268
Derivative assets	19,425	185
Derivative liabilities	42,384	11,546
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	0	0
Equity securities, at fair value		0
Derivative assets	0	0
Derivative liabilities	0	0
Measured on recurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	1,316,952	1,098,336
Equity securities, at fair value	5,418	2,855
Derivative assets	19,425	185
Assets	1,341,795	1,101,376
Derivative liabilities	42,384	11,546
Measured on recurring basis | U.S. government and agency obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	25,549	42,386
Measured on recurring basis | Mortgage-backed securities and collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	1,200,394	979,881
Measured on recurring basis | Municipal obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	16,862	2,284
Measured on recurring basis | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	69,477	69,180
Measured on recurring basis | Trust preferred securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	4,670	4,605
Measured on recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	25,549	42,386
Equity securities, at fair value	5,072	2,587
Derivative assets	0	0
Assets	30,621	44,973
Derivative liabilities	0	0
Measured on recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government and agency obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	25,549	42,386
Measured on recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage-backed securities and collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	0	0
Measured on recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Municipal obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	0	0
Measured on recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	0	0
Measured on recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Trust preferred securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	0	0
Measured on recurring basis | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	1,291,403	1,055,950
Equity securities, at fair value	346	268
Derivative assets	19,425	185
Assets	1,311,174	1,056,403
Derivative liabilities	42,384	11,546
Measured on recurring basis | Significant Other Observable Inputs (Level 2) | U.S. government and agency obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	0	0
Measured on recurring basis | Significant Other Observable Inputs (Level 2) | Mortgage-backed securities and collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	1,200,394	979,881
Measured on recurring basis | Significant Other Observable Inputs (Level 2) | Municipal obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	16,862	2,284
Measured on recurring basis | Significant Other Observable Inputs (Level 2) | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	69,477	69,180
Measured on recurring basis | Significant Other Observable Inputs (Level 2) | Trust preferred securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	4,670	4,605
Measured on recurring basis | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	0	0
Equity securities, at fair value	0	0
Derivative assets	0	0
Assets	0	0
Derivative liabilities	0	0
Measured on recurring basis | Significant Unobservable Inputs (Level 3) | U.S. government and agency obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	0	0
Measured on recurring basis | Significant Unobservable Inputs (Level 3) | Mortgage-backed securities and collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	0	0
Measured on recurring basis | Significant Unobservable Inputs (Level 3) | Municipal obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	0	0
Measured on recurring basis | Significant Unobservable Inputs (Level 3) | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	0	0
Measured on recurring basis | Significant Unobservable Inputs (Level 3) | Trust preferred securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale, at fair value	$ 0	$ 0

XML

Fair Value Measurements - Narrative (Details)	12 Months Ended
	Dec. 31, 2020
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjustments for estimated costs to sell collateral dependent impaired loans	6.00%
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Adjustments for estimated costs to sell collateral dependent impaired loans	8.00%

XML

Fair Value Measurements - Assets and Liabilities Measured on Non-Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, at fair value	$ 0	$ 0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, at fair value	0	0
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, at fair value	6,394,524	6,219,008
Measured on non-recurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, at fair value		1,063
Mortgage servicing rights	1,338	681
Assets	1,338	1,744
Measured on non-recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, at fair value		0
Mortgage servicing rights	0	0
Assets	0	0
Measured on non-recurring basis | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, at fair value		0
Mortgage servicing rights	0	0
Assets	0	0
Measured on non-recurring basis | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held-for-sale, at fair value		1,063
Mortgage servicing rights	1,338	681
Assets	$ 1,338	$ 1,744

XML

Fair Value Measurements - Qualitative Valuation (Details) $ in Thousands	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Measured on non-recurring basis
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Loans held-for-sale, at fair value		$ 1,063
Mortgage servicing rights	$ 1,338	681
Significant Unobservable Inputs (Level 3)
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Loans held-for-sale, at fair value	6,394,524	6,219,008
Significant Unobservable Inputs (Level 3) | Measured on non-recurring basis
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Loans held-for-sale, at fair value		1,063
Mortgage servicing rights	$ 1,338	$ 681
Significant Unobservable Inputs (Level 3) | Discount Rate | Measured on non-recurring basis | Estimated Cash Flow
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired financing receivable, measurement input		0
Significant Unobservable Inputs (Level 3) | Discount Rate | Measured on non-recurring basis | Weighted Average | Estimated Cash Flow
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired financing receivable, measurement input		0
Servicing asset, measurement input	0.1025	0.1175
Significant Unobservable Inputs (Level 3) | Prepayments Speeds and Discount Rates | Measured on non-recurring basis | Minimum | Estimated Cash Flow
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Servicing asset, measurement input	0.097	0.036
Significant Unobservable Inputs (Level 3) | Prepayments Speeds and Discount Rates | Measured on non-recurring basis | Maximum | Estimated Cash Flow
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Servicing asset, measurement input	0.262	0.240
Significant Unobservable Inputs (Level 3) | Prepayments Speeds and Discount Rates | Measured on non-recurring basis | Weighted Average | Estimated Cash Flow
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Servicing asset, measurement input	0.167	0.127

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Fair Value Measurements - Fair Value on Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financial assets:
Debt securities available for sale, at fair value	$ 1,316,952	$ 1,098,336
Debt securities held to maturity	277,091	289,505
Equity securities, at fair value	5,418	2,855
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	422,957	75,547
Debt securities available for sale, at fair value		42,386
Debt securities held to maturity	5,001	19,960
Equity securities, at fair value	5,072	2,587
Federal Home Loan Bank stock	0	0
Loans receivable, net	0	0
Derivative assets	0	0
Financial liabilities:
Deposits	0	0
Borrowings	0	0
Derivative liabilities	0	0
Significant Other Observable Inputs (Level 2)
Financial assets:
Cash and cash equivalents	0	0
Debt securities available for sale, at fair value		1,055,950
Debt securities held to maturity	272,090	269,545
Equity securities, at fair value	346	268
Federal Home Loan Bank stock	43,759	69,579
Loans receivable, net	0	0
Derivative assets	19,425	185
Financial liabilities:
Deposits	6,793,034	5,654,075
Borrowings	808,853	1,411,962
Derivative liabilities	42,384	11,546
Significant Unobservable Inputs (Level 3)
Financial assets:
Cash and cash equivalents	0	0
Debt securities available for sale, at fair value	0	0
Debt securities held to maturity	0	0
Equity securities, at fair value		0
Federal Home Loan Bank stock	0	0
Loans receivable, net	6,394,524	6,219,008
Derivative assets	0	0
Financial liabilities:
Deposits	0	0
Borrowings	0	0
Derivative liabilities	0	0
Carrying Value
Financial assets:
Cash and cash equivalents	422,957	75,547
Debt securities available for sale, at fair value	1,316,952	1,098,336
Debt securities held to maturity	262,720	285,756
Equity securities, at fair value	5,418	2,855
Federal Home Loan Bank stock	43,759	69,579
Loans receivable, net	6,107,094	6,135,857
Derivative assets	19,425	185
Financial liabilities:
Deposits	6,778,624	5,645,842
Borrowings	799,364	1,407,022
Derivative liabilities	42,384	11,546
Total Fair Value
Financial assets:
Cash and cash equivalents	422,957	75,547
Debt securities available for sale, at fair value	1,316,952	1,098,336
Debt securities held to maturity	277,091	289,505
Equity securities, at fair value	5,418	2,855
Federal Home Loan Bank stock	43,759	69,579
Loans receivable, net	6,394,524	6,219,008
Derivative assets	19,425	185
Financial liabilities:
Deposits	6,793,034	5,654,075
Borrowings	808,853	1,411,962
Derivative liabilities	$ 42,384	$ 11,546

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Selected Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Total interest income	$ 72,501	$ 72,933	$ 75,587	$ 74,690	$ 71,026	$ 64,438	$ 62,732	$ 62,887	$ 61,785	$ 57,695	$ 55,019	$ 51,791	$ 295,711	$ 261,083	$ 226,290
Total interest expense	13,825	16,609	19,716	23,988	23,598	22,722	21,889	20,503	18,410	17,112	14,004	12,730	74,138	88,712	62,256
Net interest income	58,676	56,324	55,871	50,702	47,428	41,716	40,843	42,384	43,375	40,583	41,015	39,061	221,573	172,371	164,034
Provision charged	627	2,516	5,736	9,568	2,519	1,157	112	436	777	1,500	2,400	2,000	18,447	4,224	6,677
Net interest income after provision for credit losses	58,049	53,808	50,135	41,134	44,909	40,559	40,731	41,948	42,598	39,083	38,615	37,061	203,126	168,147	157,357
Total non-interest income	9,962	7,909	7,008	6,391	8,709	10,115	6,775	6,037	6,405	5,290	5,450	4,543	31,270	31,636	21,688
Total non-interest expense	40,810	41,378	37,443	38,508	36,237	31,064	31,841	29,559	31,013	26,590	61,768	26,015	158,139	128,701	145,386
Income before income tax expense	27,201	20,339	19,700	9,017	17,381	19,610	15,665	18,426	17,990	17,783	(17,703)	15,589	76,257	71,082	33,659
Income tax expense	6,547	5,252	4,603	2,252	3,832	5,392	3,634	3,507	3,123	6,956	(2,961)	3,805	18,654	16,365	10,923
Net income	$ 20,654	$ 15,087	$ 15,097	$ 6,765	$ 13,549	$ 14,218	$ 12,031	$ 14,919	$ 14,867	$ 10,827	$ (14,742)	$ 11,784	$ 57,603	$ 54,717	$ 22,736
Earnings per share - basic and diluted (in dollars per share)	$ 0.19	$ 0.14	$ 0.14	$ 0.06	$ 0.12	$ 0.13	$ 0.11	$ 0.13	$ 0.13	$ 0.10	$ (0.13)		$ 0.52	$ 0.49	$ 0.20
Weighted average shares outstanding - basic and diluted (in shares)	108,499,658	110,983,871	111,102,306	108,438,173	109,958,999	111,371,754	111,553,203	111,536,577	111,423,361	111,389,951	111,360,278		109,755,924	111,101,246	111,395,723

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Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Net income	$ 20,654	$ 15,087	$ 15,097	$ 6,765	$ 13,549	$ 14,218	$ 12,031	$ 14,919	$ 14,867	$ 10,827	$ (14,742)	$ 11,784	$ 57,603	$ 54,717	$ 22,736
Shares:
Weighted average shares outstanding - basic (in shares)													109,755,924	111,101,246	111,395,723
Weighted average dilutive shares outstanding (in shares)													0	0	0
Weighted average shares outstanding - diluted (in shares)													109,755,924	111,101,246	111,395,723
Earnings per share:
Basic (in dollars per share)													$ 0.52	$ 0.49	$ 0.20
Diluted (in dollars per share)													$ 0.52	$ 0.49	$ 0.20

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Earnings per Share - Narrative (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)	1,413,818	1,111,650	0

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Parent-only Financial Information - Statement of Financial Condition (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and due from banks	$ 422,787	$ 75,420
Short-term investments	170	127
Total cash and cash equivalents	422,957	75,547
Debt securities available for sale, at fair value	1,316,952	1,098,336
Equity securities, at fair value	5,418	2,855
Other assets	209,852	145,708
Total assets	8,798,536	8,188,694
Liabilities:
Balance	799,364	1,407,022
Accrued expenses and other liabilities	176,691	117,806
Total liabilities	7,787,249	7,206,177
Stockholders' equity	1,011,287	982,517	$ 972,060	$ 472,070
Total liabilities and stockholders' equity	8,798,536	8,188,694
Parent Company
Assets
Cash and due from banks	94,053	168,242
Short-term investments	170	127
Total cash and cash equivalents	94,223	168,369
Debt securities available for sale, at fair value	0	1,496
Equity securities, at fair value	1,167	1,282
Investment in subsidiaries	873,629	785,964
Loans receivable, net	41,461	42,982
Other assets	9,803	8,431
Total assets	1,020,283	1,008,524
Liabilities:
Balance	6,953	23,831
Accrued expenses and other liabilities	2,043	2,176
Total liabilities	8,996	26,007
Stockholders' equity	1,011,287	982,517
Total liabilities and stockholders' equity	$ 1,020,283	$ 1,008,524

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Parent-only Financial Information - Statement of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest income:
Loans receivable													$ 255,236	$ 217,774	$ 189,869
Unrealized gain (loss) on debt securities available for sale													21,236	21,067	(5,778)
Interest expense on borrowings													18,892	27,161	22,733
Net interest income	$ 58,676	$ 56,324	$ 55,871	$ 50,702	$ 47,428	$ 41,716	$ 40,843	$ 42,384	$ 43,375	$ 40,583	$ 41,015	$ 39,061	221,573	172,371	164,034
Non-interest income:
Gain on securities transactions													370	2,612	116
Change in fair value of equity securities													767	305	0
Other non-interest income													6,983	5,922	4,943
Total non-interest income	9,962	7,909	7,008	6,391	8,709	10,115	6,775	6,037	6,405	5,290	5,450	4,543	31,270	31,636	21,688
Non-interest expense:
Charitable contribution to foundation													0	0	34,767
Merger-related expenses													1,931	2,755	0
Other non-interest expense													21,499	11,769	5,597
Total non-interest expense	40,810	41,378	37,443	38,508	36,237	31,064	31,841	29,559	31,013	26,590	61,768	26,015	158,139	128,701	145,386
Income before income tax expense	27,201	20,339	19,700	9,017	17,381	19,610	15,665	18,426	17,990	17,783	(17,703)	15,589	76,257	71,082	33,659
Income tax benefit	(6,547)	(5,252)	(4,603)	(2,252)	(3,832)	(5,392)	(3,634)	(3,507)	(3,123)	(6,956)	2,961	(3,805)	(18,654)	(16,365)	(10,923)
Net income	$ 20,654	$ 15,087	$ 15,097	$ 6,765	$ 13,549	$ 14,218	$ 12,031	$ 14,919	$ 14,867	$ 10,827	$ (14,742)	$ 11,784	57,603	54,717	22,736
Other comprehensive income (loss)													(890)	3,710	(6,487)
Total comprehensive income, net of tax													56,713	58,427	16,249
Parent Company
Condensed Financial Statements, Captions [Line Items]
Dividends from subsidiary													50,000	179,000	0
Interest income:
Loans receivable													2,047	2,111	1,513
Unrealized gain (loss) on debt securities available for sale													51	51	123
Interest-earning deposits													1	173	871
Total interest income													52,099	181,335	2,507
Interest expense on borrowings													863	176	3,468
Net interest income													51,236	181,159	(961)
Equity earnings (loss) in subsidiary													8,027	(123,142)	51,401
Non-interest income:
Gain on securities transactions													2	236	0
Change in fair value of equity securities													(115)	65	0
Other non-interest income													0	139	0
Total non-interest income													(113)	440	0
Non-interest expense:
Charitable contribution to foundation													0	0	34,767
Merger-related expenses													280	1,807	0
Other non-interest expense													1,377	1,955	425
Total non-interest expense													1,657	3,762	35,192
Income before income tax expense													57,493	54,695	15,248
Income tax benefit													110	22	7,488
Net income													57,603	54,717	22,736
Other comprehensive income (loss)													(890)	3,710	(6,487)
Total comprehensive income, net of tax													$ 56,713	$ 58,427	$ 16,249

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Parent-only Financial Information - Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income	$ 20,654	$ 15,087	$ 15,097	$ 6,765	$ 13,549	$ 14,218	$ 12,031	$ 14,919	$ 14,867	$ 10,827	$ (14,742)	$ 11,784	$ 57,603	$ 54,717	$ 22,736
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of debt issuance costs													0	0	890
Amortization of intangible assets													1,048	222	0
Gain on securities transactions													(370)	(2,612)	(116)
Change in fair value of equity securities													(767)	(305)	0
Deferred tax expense (benefit)													9,738	7,527	(5,490)
(Increase) in other assets													(75,127)	(51,856)	(11,053)
Increase in accrued expenses and other liabilities													32,891	3,032	7,980
Contribution of common stock to Columbia Bank Foundation													0	0	34,767
Net cash provided by operating activities													47,886	21,824	56,594
Cash flows from investing activities:
Proceeds from sales of equity securities													0	1,065	0
Proceeds from paydown/maturities/calls of debt securities available for sale													247,908	149,683	69,977
Purchases of debt securities available for sale													(292,809)	(176,171)	(413,804)
Purchases of equity securities													0	(416)	0
Repayment of loan receivable from Bank													35,613	11,671	32,039
Net cash acquired in acquisitions													155,248	(31,288)	0
Net cash provided by (used in) investing activities													257,645	(521,014)	(943,149)
Cash flows from financing activities:
Purchase of treasury stock													(108,166)	(55,309)	0
Restricted stock forfeitures													(24)	(736)	0
Restricted stock repurchased on vesting to pay taxes													(174)	0	0
Issuance of treasury stock allocated to restricted stock award grants													0	1,095	0
Net cash provided by financing activities													41,879	532,536	863,258
Net increase (decrease) in cash and cash equivalents													347,410	33,346	(23,297)
Cash and cash equivalents at beginning of period				75,547				42,201				65,498	75,547	42,201	65,498
Cash and cash equivalents at end of period	422,957				75,547				42,201				422,957	75,547	42,201
Non-cash assets acquired:
Equity securities													1,796	1,073	0
Other assets													1,489	767	0
Total non-cash assets acquired													271,958	856,640	0
Liabilities assumed:
Borrowings													37,728	82,761	0
Total liabilities assumed													377,344	880,399	0
Net non-cash liabilities acquired													(105,386)	(23,759)	0
Net cash and cash equivalents acquired in acquisitions													155,248	105,006	0
Parent Company
Cash flows from operating activities:
Net income													57,603	54,717	22,736
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of debt issuance costs													0	0	890
Amortization of intangible assets													(278)	(71)	0
Gain on securities transactions													(2)	(236)	0
Change in fair value of equity securities													115	(65)	0
Deferred tax expense (benefit)													1,411	1,453	(6,086)
(Increase) in other assets													(2,675)	(2,026)	1,515
Increase in accrued expenses and other liabilities													(647)	3,515	(1,498)
Contribution of common stock to Columbia Bank Foundation													0	0	34,767
Equity in undistributed (earnings) loss of subsidiary													(8,027)	123,142	(51,401)
Net cash provided by operating activities													47,500	180,429	923
Cash flows from investing activities:
Capital contribution to subsidiary													0	0	(246,420)
Proceeds from sales of equity securities													0	1,065	0
Proceeds from paydown/maturities/calls of debt securities available for sale													1,498	500	1,601
Purchases of debt securities available for sale													0	0	(414)
Purchases of equity securities													0	(416)	0
Loan to ESOP													0	0	(45,428)
Repayment of loan receivable from Bank													1,521	1,457	989
Net cash acquired in acquisitions													0	(135,410)	0
Net cash provided by (used in) investing activities													3,019	(132,804)	(289,672)
Cash flows from financing activities:
Payments of subordinated debt and trust preferred securities													(16,600)	0	(51,547)
Issuance of common stock in initial public offering													0	0	492,428
Purchase of treasury stock													(108,166)	(55,309)	0
Issuance of common stock allocated to restricted stock award grants													0	21,687	0
Restricted stock forfeitures													(199)	(736)	0
Restricted stock repurchased on vesting to pay taxes													(181)	0	0
Issuance of treasury stock allocated to restricted stock award grants													481	1,269	0
Net cash provided by financing activities													(124,665)	(33,089)	440,881
Net increase (decrease) in cash and cash equivalents													(74,146)	14,536	152,132
Cash and cash equivalents at beginning of period				$ 168,369				$ 153,833				$ 1,701	168,369	153,833	1,701
Cash and cash equivalents at end of period	$ 94,223				$ 168,369				$ 153,833				94,223	168,369	153,833
Non-cash assets acquired:
Debt securities available for sale													0	1,998	0
Equity securities													0	208	0
Other assets													0	1,492	0
Total non-cash assets acquired													0	3,698	0
Liabilities assumed:
Borrowings													0	23,901	0
Total liabilities assumed													0	23,901	0
Net non-cash liabilities acquired													0	(20,203)	0
Net cash and cash equivalents acquired in acquisitions													$ 0	$ 884	$ 0

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Other Comprehensive Income (Loss) - Tax effects of components in other comprehensive income (loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Before Tax
Other comprehensive income (loss)	$ (1,122)	$ 4,690	$ (7,378)
Tax Effect
Other comprehensive income (loss)	232	(980)	891
After Tax
Total other comprehensive (loss) income	(890)	3,710	(6,487)
Unrealized Gains on Debt Securities Available for Sale
Before Tax
Other comprehensive income (loss), before reclassifications	26,876	26,601	(7,224)
Other comprehensive income (loss)	27,406	29,224	(7,353)
Tax Effect
Other comprehensive income (loss), before reclassifications	(5,640)	(5,534)	1,446
Other comprehensive income (loss)	(5,755)	(6,137)	1,470
After Tax
Other comprehensive income (loss), before reclassifications	21,236	21,067	(5,778)
Total other comprehensive (loss) income	21,651	23,087	(5,883)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Accretion Of Unrealized Gains (Losses), Parent
Before Tax
Reclassification from AOCI, current period	160	11	(13)
Tax Effect
Reclassification from AOCI, current period	(34)	(2)	0
After Tax
Reclassification from AOCI, current period	126	9	(13)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Other Reclassifications, Parent
Before Tax
Reclassification from AOCI, current period	370	2,612	(116)
Tax Effect
Reclassification from AOCI, current period	(81)	(601)	24
After Tax
Reclassification from AOCI, current period	289	2,011	(92)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Before Tax
Other comprehensive income (loss), before reclassifications	(10,605)	(8,193)	(2,825)
Tax Effect
Other comprehensive income (loss), before reclassifications	2,223	1,725	595
After Tax
Other comprehensive income (loss), before reclassifications	(8,382)	(6,468)	(2,230)
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent
Before Tax
Reclassification from AOCI, current period	(56)	(56)	(623)
Tax Effect
Reclassification from AOCI, current period	12	12	132
After Tax
Reclassification from AOCI, current period	(44)	(44)	(491)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent
Before Tax
Reclassification from AOCI, current period	(4,284)	(3,709)	2,526
Tax Effect
Reclassification from AOCI, current period	900	779	(530)
After Tax
Reclassification from AOCI, current period	(3,384)	(2,930)	1,996
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Before Tax
Other comprehensive income (loss), before reclassifications	(13,583)	(12,576)	897
Other comprehensive income (loss)	(17,923)	(16,341)	2,800
Tax Effect
Other comprehensive income (loss), before reclassifications	2,852	2,641	(776)
Other comprehensive income (loss)	3,764	3,432	(1,174)
After Tax
Other comprehensive income (loss), before reclassifications	(10,731)	(9,935)	121
Total other comprehensive (loss) income	$ (14,159)	$ (12,909)	$ 1,626

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Other Comprehensive Income (Loss) - Changes in components of other comprehensive income (loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 982,517	$ 972,060	$ 472,070
Current period changes in other comprehensive income (loss)	(890)	3,710	(6,487)
Balance at end of year	1,011,287	982,517	972,060
Cumulative Effect, Period of Adoption, Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period		0
Balance at end of year			0
Cumulative Effect, Period of Adoption, Adjusted Balance
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period		972,060
Balance at end of year			972,060
Accumulated Other Comprehensive (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(68,735)	(71,897)	(65,410)
Current period changes in other comprehensive income (loss)	(890)	3,710	(6,487)
Current period changes in other comprehensive (loss) income			(6,487)
Balance at end of year	(69,625)	(68,735)	(71,897)
Accumulated Other Comprehensive (Loss) | Cumulative Effect, Period of Adoption, Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period		(548)
Balance at end of year			(548)
Accumulated Other Comprehensive (Loss) | Cumulative Effect, Period of Adoption, Adjusted Balance
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(68,735)	(72,445)
Balance at end of year		(68,735)	(72,445)
Unrealized Gains on Debt Securities Available for Sale
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	9,377	(13,162)	(7,279)
Current period changes in other comprehensive income (loss)	21,651	23,087	(5,883)
Current period changes in other comprehensive (loss) income			(5,883)
Balance at end of year	31,028	9,377	(13,162)
Unrealized Gains on Debt Securities Available for Sale | Cumulative Effect, Period of Adoption, Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period		(548)
Balance at end of year			(548)
Unrealized Gains on Debt Securities Available for Sale | Cumulative Effect, Period of Adoption, Adjusted Balance
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	9,377	(13,710)
Balance at end of year		9,377	(13,710)
Unrealized (Losses) on Swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(8,474)	(2,006)	224
Current period changes in other comprehensive income (loss)	(8,382)	(6,468)
Current period changes in other comprehensive (loss) income			(2,230)
Balance at end of year	(16,856)	(8,474)	(2,006)
Unrealized (Losses) on Swaps | Cumulative Effect, Period of Adoption, Adjusted Balance
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(8,474)	(2,006)
Balance at end of year		(8,474)	(2,006)
Employee Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(69,638)	(56,729)	(58,355)
Current period changes in other comprehensive income (loss)	(14,159)	(12,909)	1,626
Current period changes in other comprehensive (loss) income			1,626
Balance at end of year	(83,797)	(69,638)	(56,729)
Employee Benefit Plans | Cumulative Effect, Period of Adoption, Adjusted Balance
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ (69,638)	(56,729)
Balance at end of year		$ (69,638)	$ (56,729)

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Other Comprehensive Income (Loss) - Reclassification out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain on securities transactions													$ 370	$ 2,612	$ 116
Other non-interest expense													21,499	11,769	5,597
Income before income tax expense	$ 27,201	$ 20,339	$ 19,700	$ 9,017	$ 17,381	$ 19,610	$ 15,665	$ 18,426	$ 17,990	$ 17,783	$ (17,703)	$ 15,589	76,257	71,082	33,659
Income (tax) benefit	(6,547)	(5,252)	(4,603)	(2,252)	(3,832)	(5,392)	(3,634)	(3,507)	(3,123)	(6,956)	2,961	(3,805)	(18,654)	(16,365)	(10,923)
Net income	$ 20,654	$ 15,087	$ 15,097	$ 6,765	$ 13,549	$ 14,218	$ 12,031	$ 14,919	$ 14,867	$ 10,827	$ (14,742)	$ 11,784	57,603	54,717	22,736
Accumulated Other Comprehensive (Loss) Income Components
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income before income tax expense													(3,914)	(1,097)	2,410
Income (tax) benefit													819	178	(506)
Net income													(3,095)	(919)	1,904
Accumulated Other Comprehensive (Loss) Income Components | Reclassification adjustment for gains (losses) included in net income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain on securities transactions													370	2,612	(116)
Accumulated Other Comprehensive (Loss) Income Components | Reclassification adjustment of actuarial net (loss) gain included in net income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other non-interest expense													$ (4,284)	$ (3,709)	$ 2,526

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Derivatives and Hedging Activities - Narrative (Details)	12 Months Ended
	Dec. 31, 2020 USD ($) swap	Dec. 31, 2019 USD ($) swap	Dec. 31, 2018 USD ($)
Derivative [Line Items]
Accrued interest on derivative, at fair value	$ 1,000,000.0	$ 344,000
Net liability position	21,900,000
Collateral against obligations	41,200,000
Interest rate swaps
Derivative [Line Items]
Derivative gains (losses) recorded in the Statements of Income	(306,000)	204,000	$ (52,000)
FHLB advances | Interest rate swaps
Derivative [Line Items]
Notional amount of derivative	430,000,000.0	410,000,000.0
Not-designated hedge | Currency forward contract - non-designated hedge
Derivative [Line Items]
Notional amount of derivative	0	0
Not-designated hedge | Interest rate swaps
Derivative [Line Items]
Notional amount of derivative	$ 175,100,000	$ 169,900,000
Number of commercial banking customers | swap	48	22
Designated as hedging instrument | FHLB advances | Interest rate swaps
Derivative [Line Items]
Notional amount of derivative	$ 430,000,000.0	$ 410,000,000.0
Number of interest rate derivatives held | swap	31	29

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Derivatives and Hedging Activities - Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Interest rate swaps | Designated as hedging instrument | Other Assets
Derivatives, Fair Value [Line Items]
Derivative assets	$ 19,425	$ 185
Interest rate swaps | Designated as hedging instrument | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	42,384	11,546
Carrying Value
Derivatives, Fair Value [Line Items]
Derivative assets	19,425	185
Derivative liabilities	$ 42,384	$ 11,546

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Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Total out-of-scope non-interest income													$ 16,131	$ 17,333	$ 8,725
Total non-interest income	$ 9,962	$ 7,909	$ 7,008	$ 6,391	$ 8,709	$ 10,115	$ 6,775	$ 6,037	$ 6,405	$ 5,290	$ 5,450	$ 4,543	31,270	31,636	21,688
Deposit Account, Title Insurance And Other Non-Interest Income
Disaggregation of Revenue [Line Items]
Revenue													15,139	14,303	12,963
Demand deposit account fees
Disaggregation of Revenue [Line Items]
Revenue													3,633	4,478	3,987
Title insurance fees
Disaggregation of Revenue [Line Items]
Revenue													5,034	4,981	4,297
Other non-interest income
Disaggregation of Revenue [Line Items]
Revenue													$ 6,472	$ 4,844	$ 4,679