10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark one)

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

For the quarterly period ended September 30, 2020

or

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

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 Number)
19-01 Route 208 North,	Fair Lawn,
New Jersey		07140
(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 each exchange on which registered
Common Stock, $0.01 par value per share	CLBK	The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant (1) 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 (§232.405 of this chapter) 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, a 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	☐	Smaller reporting company	☐
Non-accelerated filer	☐	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 is a shell company (as defined in Rule 12b-2 of the Exchange Act).

☐ Yes ☒ No

As of November 6, 2020, there were 112,655,544 shares issued and outstanding of the Registrant's common stock, par value $0.01 per share.

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Index to Form 10-Q

Item Number		Page Number
PART I.	Financial Information
Item 1.	Financial Statements
	Consolidated Statements of Financial Condition as of September 30, 2020 (Unaudited) and December 31, 2019	2
	Consolidated Statements of Income for the Three and Nine Months Ended September 30, 2020 and 2019 (Unaudited)	3
	Consolidated Statements of Comprehensive Income (Loss) for the Three and Nine Months September 30, 2020 and 2019 (Unaudited)	4
	Consolidated Statements of Changes in Stockholder's Equity for the Three and Nine Months Ended September 30, 2020 and 2019 (Unaudited)	5
	Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2020 and 2019 (Unaudited)	8
	Notes to Unaudited Consolidated Financial Statements	10
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	55
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	62
Item 4.	Controls and Procedures	66
PART II.	Other Information
	Item 1. Legal Proceedings	67
	Item 1A. Risk Factors	67
	Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	67
	Item 3. Defaults Upon Senior Securities	67
	Item 4. Mine Safety Disclosures	67
	Item 5. Other Information	67
	Item 6. Exhibits	67
	Exhibit Index	68
	SIGNATURES	69

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Consolidated Statements of Financial Condition

(In thousands, except share and per share data)

	September 30,		December 31,
	2020		2019
Assets	(Unaudited)
Cash and due from banks	$	265,737	$	75,420
Short-term investments	159		127
Total cash and cash equivalents	265,896		75,547
Debt securities available for sale, at fair value	1,245,300		1,098,336
Debt securities held to maturity, at amortized cost (fair value of $288,439 and $289,505 at September 30, 2020 and December 31, 2019, respectively)	272,712		285,756
Equity securities, at fair value	4,706		2,855
Federal Home Loan Bank stock	53,416		69,579
Loans held-for-sale, at fair value	4,146		—
Loans receivable	6,468,845		6,197,566
Less: allowance for loan losses	76,133		61,709
Loans receivable, net	6,392,712		6,135,857
Accrued interest receivable	31,252		22,092
Office properties and equipment, net	76,853		72,967
Bank-owned life insurance	233,127		211,415
Goodwill and intangible assets	92,506		68,582
Other assets	192,847		145,708
Total assets	$	8,865,473	$	8,188,694
Liabilities and Stockholders' Equity
Liabilities:
Deposits	$	6,629,648	$	5,645,842
Borrowings	1,015,210		1,407,022
Advance payments by borrowers for taxes and insurance	34,254		35,507
Accrued expenses and other liabilities	169,031		117,806
Total liabilities	7,848,143		7,206,177
Stockholders' equity:
Preferred stock, $0.01 par value. 10,000,000 shares authorized; none issued and outstanding at September 30, 2020 and December 31, 2019	—		—
Common stock, $0.01 par value. 500,000,000 shares authorized; 122,037,793 shares issued and 114,415,010 shares outstanding at September 30, 2020, and 117,278,745 shares issued and 113,765,387 outstanding at December 31, 2019	1,220		1,173
Additional paid-in capital	607,735		531,667
Retained earnings	652,430		615,481
Accumulated other comprehensive loss	(87,929)		(68,735)
Treasury stock, at cost; 7,622,783 shares at September 30, 2020 and 3,513,358 shares at December 31, 2019	(115,580)		(54,950)
Common stock held by the Employee Stock Ownership Plan	(39,862)		(41,564)
Stock held by Rabbi Trust	(1,814)		(1,520)
Deferred compensation obligations	1,130		965
Total stockholders' equity	1,017,330		982,517
Total liabilities and stockholders' equity	$	8,865,473	$	8,188,694
See accompanying notes to unaudited consolidated financial statements.

2

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Consolidated Statements of Income

(In thousands, except share and per share data)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Interest income:	(Unaudited)
Loans receivable	$	63,258	$	53,594	192,511		157,563
Debt securities available for sale and equity securities	7,034		7,736		21,654		23,295
Debt securities held to maturity	1,749		2,068		5,807		6,090
Federal funds and interest earning deposits	71		182		287		405
Federal Home Loan Bank stock dividends	821		858		2,951		2,704
Total interest income	72,933		64,438		223,210		190,057
Interest expense:
Deposits	12,826		16,055		44,569		44,984
Borrowings	3,783		6,667		15,744		20,130
Total interest expense	16,609		22,722		60,313		65,114
Net interest income	56,324		41,716		162,897		124,943
Provision for loan losses	2,516		1,157		17,820		1,705
Net interest income after provision for loan losses	53,808		40,559		145,077		123,238
Non-interest income:
Demand deposit account fees	787		1,106		2,706		3,116
Bank-owned life insurance	1,531		1,784		4,467		4,449
Title insurance fees	1,218		1,350		3,445		3,490
Loan fees and service charges	565		3,038		1,826		5,358
Gain on securities transactions	—		1,256		370		1,721
Change in fair value of equity securities	(4)		(59)		55		189
Gain on sale of loans	1,873		382		3,422		710
Other non-interest income	1,939		1,258		5,017		3,895
Total non-interest income	7,909		10,115		21,308		22,928
Non-interest expense:
Compensation and employee benefits	26,666		21,362		76,349		61,285
Occupancy	4,823		3,973		14,319		11,628
Federal deposit insurance premiums	614		40		1,350		927
Advertising	484		533		2,075		3,311
Professional fees	1,680		1,541		4,129		4,219
Data processing	839		658		2,420		1,965
Merger-related expenses	424		740		1,931		1,202
Other non-interest expense	5,848		2,217		14,756		7,927
Total non-interest expense	41,378		31,064		117,329		92,464
Income before income tax expense	20,339		19,610		49,056		53,702
Income tax expense	5,252		5,392		12,107		12,534
Net income	$	15,087	$	14,218	36,949		41,168
Earnings per share - basic and diluted	$	0.14	$	0.13	$	0.34	$	0.37
Weighted average shares outstanding -basic and diluted	110,983,871		111,371,754		110,177,736		111,486,179
See accompanying notes to unaudited consolidated financial statements.

3

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Consolidated Statements of Comprehensive Income (Loss)

(In thousands)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
	(Unaudited)
Net income	$	15,087	$	14,218	$	36,949	$	41,168
Other comprehensive income (loss), net of tax:
Unrealized (losses) gains on debt securities available for sale	(2,913)		4,915		22,705		28,302
Accretion of unrealized (loss) gain on debt securities reclassified as held to maturity	(4)		2		1		10
Reclassification adjustment for gains included in net income	—		965		289		1,325
	(2,917)		5,882		22,995		29,637
Derivatives, net of tax:
Unrealized gain (loss) on swap contracts accounted for as cash flow hedges	1,785		(1,279)		(10,314)		(8,735)
	1,785		(1,279)		(10,314)		(8,735)
Employee benefit plans, net of tax:
Amortization of prior service cost included in net income	(11)		(11)		(32)		(33)
Reclassification adjustment of actuarial net gain included in net income	(846)		(735)		(2,539)		(2,196)
Change in funded status of retirement obligations	(32,733)		1,490		(29,304)		(2,200)
	(33,590)		744		(31,875)		(4,429)
Total other comprehensive income (loss)	(34,722)		5,347		(19,194)		16,473
Total comprehensive income (loss), net of tax	$	(19,635)	$	19,565	$	17,755	$	57,641
See accompanying notes to unaudited consolidated financial statements.

4

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Consolidated Statements of Changes in Stockholders' Equity (Unaudited)

Three Months Ended September 30, 2020 and 2019

(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 June 30, 2019	$	1,159	$	527,650	$	587,714	$	(61,319)	$	(3,867)	$	(42,710)	$	(1,407)	$	689	$	1,007,909
Net income	—		—		14,218		—		—		—		—		—		14,218
Other comprehensive income	—		—		—		5,347		—		—		—		—		5,347
Issuance of common stock allocated to restricted stock award grants	14		—		—		—		—		—		—		—		14
Stock based compensation	—		1,630		—		—		—		—		—		—		1,630
Purchase of treasury stock (2,478,400 shares)	—		—		—		—		(38,217)		—		—		—		(38,217)
Employee Stock Ownership Plan shares committed to be released	—		308		—		—		—		573		—		—		881
Funding of deferred compensation obligations	—		—		—		—		—		—		(60)		113		53
Balance at September 30, 2019	$	1,173	$	529,588	$	601,932	$	(55,972)	$	(42,084)	$	(42,137)	$	(1,467)	$	802	$	991,835
Balance at June 30, 2020	$	1,220	$	605,124	$	637,343	$	(53,207)	$	(108,327)	$	(40,434)	$	(1,767)	$	1,036	$	1,040,988
Net income	—		—		15,087		—		—		—		—		—		15,087
Other comprehensive (loss)	—		—		—		(34,722)		—		—		—		—		(34,722)
Stock based compensation	—		2,176		—		—		—		—		—		—		2,176
Purchase of treasury stock (624,932 shares)	—		—		—		—		(6,925)		—		—		—		(6,925)
Restricted stock forfeitures (15,390 shares)	—		173		—		—		(173)		—		—		—		—
Repurchase shares for taxes (11,782 shares)	—		155		—		—		(155)		—		—		—		—
Employee Stock Ownership Plan shares committed to be released	—		107		—		—		—		572		—		—		679
Funding of deferred compensation obligations	—		—		—		—		—		—		(47)		94		47
Balance at September 30, 2020	$	1,220	$	607,735	$	652,430	$	(87,929)	$	(115,580)	$	(39,862)	$	(1,814)	$	1,130	$	1,017,330
See accompanying notes to unaudited consolidated financial statements.

5

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Consolidated Statements of Changes in Stockholders' Equity (Unaudited)

Nine Months Ended September 30, 2019

(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 ("ASC") 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	—		—		41,168		—		—		—		—		—		41,168
Other comprehensive income	—		—		—		16,473		—		—		—		—		16,473
Issuance of common stock allocated to restricted stock award grants	14		—		—		—		—		—		—		—		14
Stock based compensation	—		1,630		—		—		—		—		—		—		1,630
Purchase of treasury stock (2,742,300 shares)	—		—		—		—		(42,084)		—		—		—		(42,084)
Employee Stock Ownership Plan shares committed to be released	—		921		—		—		—		1,698		—		—		2,619
Funding of deferred compensation obligations	—		—		—		—		—		—		(208)		163		(45)
Balance at September 30, 2019	$	1,173	$	529,588	$	601,932	$	(55,972)	$	(42,084)	$	(42,137)	$	(1,467)	$	802	$	991,835

6

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Consolidated Statements of Changes in Stockholders' Equity (Unaudited)

Nine Months Ended September 30, 2020

(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	—		—		36,949		—		—		—		—		—		36,949
Other comprehensive (loss)	—		—		—		(19,194)		—		—		—		—		(19,194)
Issuance of common stock to Columbia Bank MHC	47		68,483		—		—		—		—		—		—		68,530
Stock based compensation	—		6,585		—		—		—		—		—		—		6,585
Purchase of treasury stock (4,081,132 shares)	—		—		—		—		(60,286)		—		—		—		(60,286)
Restricted stock forfeitures (16,511 shares)	—		173		—		—		(189)		—		—		—		(16)
Repurchase shares for taxes (11,782 shares)	—		155		—		—		(155)		—		—		—		—
Employee Stock Ownership Plan shares committed to be released	—		672		—		—		—		1,702		—		—		2,374
Funding of deferred compensation obligations	—		—		—		—		—		—		(294)		165		(129)
Balance at September 30, 2020	$	1,220	$	607,735	$	652,430	$	(87,929)	$	(115,580)	$	(39,862)	$	(1,814)	$	1,130	$	1,017,330
See accompanying notes to unaudited consolidated financial statements.

7

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Consolidated Statements of Cash Flows

	Nine Months Ended September 30,
	2020		2019
	(In thousands, unaudited)
Cash flows from operating activities:
Net income	$	36,949	$	41,168
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of deferred loan costs, fees and purchased premiums and discounts	818		1,055
Net amortization of premiums and discounts on securities	1,573		787
Net amortization of mortgage servicing rights	85		(78)
Amortization of intangible assets	783		—
Depreciation and amortization of office properties and equipment	4,947		3,366
Amortization of operating lease right-of-use assets	2,641		—
Provision for loan losses	17,820		1,705
Gain on securities transactions	(370)		(1,721)
Change in fair value of equity securities	(55)		(189)
Gain on securitizations	(1,523)		—
Gain on sale of loans	(1,899)		(710)
Loss on real estate owned	—		1
Loss on disposal of office properties and equipment	691		—
Loss on write-down of mortgage servicing rights	75		—
Deferred tax expense (benefit)	(3,864)		(7,160)
(Increase) in accrued interest receivable	(8,481)		(529)
(Increase) in other assets	(80,110)		(44,037)
Increase in accrued expenses and other liabilities	33,687		36,367
Income on bank-owned life insurance	(4,467)		(4,449)
Employee stock ownership plan expense	2,374		2,619
Stock based compensation	6,585		1,630
Increase in deferred compensation obligations under Rabbi Trust	(129)		(45)
Net cash provided by operating activities	8,130		29,780
Cash flows from investing activities:
Proceeds from sales of debt securities available for sale	20,761		31,811
Proceeds from sales of equity securities	—		926
Proceeds from paydowns/maturities/calls of debt securities available for sale	162,161		88,504
Proceeds from paydowns/maturities/calls of debt securities held to maturity	30,988		37,968
Purchases of debt securities available for sale	(201,504)		(143,196)
Purchases of debt securities held to maturity	(5,000)		(65,171)
Purchases of equity securities	—		(416)
Proceeds from sales of loans held-for-sale	111,764		94,834
Proceeds from sales of loans receivable	28,923		10,273
Purchases of loans receivable	—		(29,885)
Net increase in loans receivable	(294,040)		(297,434)
Proceeds from bank-owned life insurance death benefit	—		1,015
Proceeds from redemptions of Federal Home Loan Bank stock	40,717		47,860
Purchases of Federal Home Loan Bank stock	(22,544)		(45,999)
Additions to office properties and equipment	(3,750)		(15,039)
Proceeds from sale of real estate owned	—		91
Net cash acquired in acquisition	155,248		—
Net cash provided by (used in) investing activities	23,724		(283,858)

8

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Consolidated Statements of Cash Flows (continued)

	Nine Months Ended September 30,
	2020		2019
	( In thousands, unaudited)
Cash flows from financing activities:
Net increase in deposits	$	650,572	$	369,449
Proceeds from long-term borrowings	90,000		127,337
Payments on long-term borrowings	(181,345)		(220,000)
Net (decrease) increase in short-term borrowings	(321,595)		32,600
Payment of subordinated debt	(16,600)		—
Increase in advance payments by borrowers for taxes and insurance	(2,235)		2,513
Issuance of common stock	—		14
Purchase of treasury stock	(60,286)		(42,084)
Purchase of employee stock ownership plan shares	—		—
Restricted stock forfeitures	(16)		—
Issuance of treasury stock allocated to restricted stock award grants	—		—
Net cash provided by financing activities	$	158,495	$	269,829
Net increase in cash and cash equivalents	$	190,349	$	15,751
Cash and cash equivalents at beginning of year	75,547		42,201
Cash and cash equivalents at end of period	$	265,896	$	57,952
Cash paid during the period for:
Interest on deposits and borrowings	$	60,772	$	64,892
Income tax payments, net of (refunds)	$	12,249	$	(4,293)
Non-cash investing and financing activities:
Transfer of loans receivable to loans held-for-sale	$	114,171	$	86,043
Securitization of loans	$	48,526	$	21,615
Initial recognition of operating lease right-of-use assets	$	22,218	$	—
Initial recognition of operating lease liabilities	$	23,290	$	—
Acquisition:
Non-cash assets acquired:
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		—
Other assets	2,823		—
Total non-cash assets acquired	$	266,817	$	—
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 non-cash liabilities acquired	$	(110,527)	$	—
Net cash and cash equivalents acquired in acquisition	$	155,248	$	—
See accompanying notes to unaudited consolidated financial statements.

9

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

1.Basis of Financial Statement Presentation

    The accompanying unaudited 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 (collectively, the “Company”). In consolidation, all intercompany accounts and transactions are eliminated.

    Columbia Financial, Inc. is a majority-owned subsidiary of Columbia Bank, MHC (the "MHC"). The accounts of the MHC are not consolidated in the accompanying consolidated financial statements of the Company.

    In preparing the interim unaudited consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the dates of the Consolidated Statements of Financial Condition and Consolidated Statements of Income for the periods presented. Actual results could differ from these estimates. Material estimates that are particularly susceptible to change are the determination of the adequacy of the allowance for credit losses, evaluation of the need for valuation allowances on deferred tax assets, and determination of liabilities related to retirement and other post-retirement benefits. These estimates and assumptions are evaluated on an ongoing basis and are adjusted when facts and circumstances dictate.

    The interim unaudited consolidated financial statements reflect all normal and recurring adjustments, which are, in the opinion of management, considered necessary for a fair presentation of the financial condition and results of operations for the periods presented. The results of operations for the three and nine month periods ended September 30, 2020 are not necessarily indicative of the results of operations that may be expected for the entire fiscal year or any other period. Certain reclassifications have been made in the consolidated financial statements to conform with current year classifications.

    The interim unaudited consolidated financial statements of the Company presented herein have been prepared in accordance with the rules of the Securities and Exchange Commission (“SEC”) for quarterly reports on Form 10-Q and U.S. generally accepted accounting principles (“GAAP”). Certain information and note disclosures have been condensed or omitted pursuant to the rules and regulations of the SEC.

    These unaudited consolidated financial statements should be read in conjunction with the Company's Annual Report on Form 10-K for the year ended December 31, 2019 and the audited consolidated financial statements included therein.

2.    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"), 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. At the time of closing, Stewardship had $956.0 million in total assets, including $756.9 million in net loans receivable and $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 nine months ended September 30, 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 $248,000 and $1.3 million during the three and nine months ended September 30, 2020, respectively. Merger expenses recorded during the three and nine months ended September 30, 2019 totaled $740,000 and $1.2 million, respectively.

The assets acquired and liabilities assumed have been accounted for under the acquisition method of accounting. 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. There were no adjustments recorded to the amounts as of November 1, 2019.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

2.    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 the 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 acquisition of the Roselle Entities totaled $175,000 and $618,000 during the three and nine months ended September 30, 2020, respectively. There were no merger expenses recorded during the three and nine months ended September 30, 2019.

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

	April 1, 2020
	(In thousands)
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 asset, 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 Unaudited Consolidated Financial Statements

2.     Acquisitions (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 condition, 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. As the Company continues to analyze the acquired assets and assumed liabilities, there may be adjustments to the recorded carrying values. However, management does not expect significant future adjustments to the recorded amounts as of April 1, 2020.

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:

    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. Equipment is amortized or depreciated over their estimated useful lives usually ranging for three to ten years.

Goodwill. Goodwill is not amortized for book purposes: however, it is reviewed at least annually for impairment and is not deductible for tax purposes.

    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.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

3.        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 three and nine months ended September 30, 2020 and 2019:     

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2020		2019		2020		2019
	(Dollars in thousands, except per share data)
Net income	$	15,087	$	14,218	$	36,949	$	41,168
Shares:
Weighted average shares outstanding - basic	110,983,871		111,371,754		110,177,736		111,486,179
Weighted average dilutive shares outstanding	—		—		—		—
Weighted average shares outstanding - diluted	110,983,871		111,371,754		110,177,736		111,486,179
Earnings per share:
Basic	$	0.14	$	0.13	$	0.34	$	0.37
Diluted	$	0.14	$	0.13	$	0.34	$	0.37

    For the three and nine months ended September 30, 2020 the average number of stock options which were anti-dilutive and were not included in the computation of diluted earnings per share totaled 2,272,060 and 1,436,476, respectively.

For the three and nine months ended September 30, 2019 the average number of stock options which were anti-dilutive and were not included in the computation of diluted earnings per share totaled 790,000 and 310,000, respectively.

4.    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 its 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 three and nine months ended September 30, 2020, the Company repurchased 624,932 shares at a cost of approximately $6.9 million, or $11.08 per share, and 4,081,132 shares at a cost of approximately $60.3 million, or $14.78 per share, respectively, under these programs. During the three and nine months ended September 30, 2019, the Company repurchased 2,478,400 and 2,742,300 shares, respectively, at a cost of approximately $38.2 million, or $15.42 per share, and approximately $42.1 million, or $15.35 per share, respectively. Repurchased shares are held as treasury stock and are available for general corporate purposes.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

5.    Summary of Significant Accounting Policies

Accounting Pronouncements Adopted in 2020

    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 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 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.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

5.    Summary of Significant Accounting Policies (continued)

Accounting Pronouncements Adopted in 2020 (continued)

    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 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 platformto 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 10 for more information regarding adoption.

Accounting Pronouncements Not Yet Adopted

    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.

    The Company elected to defer the adoption of the CECL methodology permitted by the recently enacted Coronavirus Aid, Relief and Economic Security Act ("CARES Act"). The Company will adopt CECL at the earlier of December 31, 2020 or when the national emergency concerning the COVID-19 outbreak has concluded. The Company 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 September 30, 2020, we currently expect the adoption of ASU 2016-13 will result in an increase between 5% and 10% in our allowance for loan losses and our reserves for unfunded commitments.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

5.    Summary of Significant Accounting Policies (continued)

Accounting Pronouncements Not Yet Adopted (continued)

    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.

    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 is currently evaluating the effect of ASU 2018-14 on its disclosures in the Company's consolidated financial statements, and as its adoption is only disclosure related, does not expect it will have a significant impact on the Company's consolidated financial statements.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

6.    Debt Securities Available for Sale

    Debt securities available for sale at September 30, 2020 and December 31, 2019 are summarized as follows:

	September 30, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
			(In thousands)
U.S. government and agency obligations	$	29,421	$	1,247	$	—	$	30,668
Mortgage-backed securities and collateralized mortgage obligations	1,095,120		39,429		(443)		1,134,106
Municipal obligations	1,870		15		—		1,885
Corporate debt securities	72,590		2,096		(505)		74,181
Trust preferred securities	5,000		—		(540)		4,460
	$	1,204,001	$	42,787	$	(1,488)	$	1,245,300

	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 September 30, 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.

	September 30, 2020
	Amortized Cost		Fair Value
	(In thousands)
One year or less	$	16,399	$	16,416
More than one year to five years	42,422		44,295
More than five years to ten years	49,590		50,000
More than ten years	470		483
	$	108,881	$	111,194
Mortgage-backed securities and collateralized mortgage obligations	1,095,120		1,134,106
	$	1,204,001	$	1,245,300

    Mortgage-backed securities and collateralized mortgage obligations totaling $1.1 billion at amortized cost, and $1.1 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.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

6.    Debt Securities Available for Sale (continued)

    During the three months ended September 30, 2020, there were no sales, calls or matured debt securities available for sale.

    During the nine months ended September 30, 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 nine months ended September 30, 2020, proceeds from called debt securities available for sale totaled $6.6 million, resulting in $1,000 of gross gains and no gross losses. During the nine months ended September 30, 2020, proceeds from matured debt securities available for sale totaled $5.8 million.

    During the three months ended September 30, 2019, proceeds from the sale of debt securities available for sale totaled $16.1 million, resulting in $1.2 million of gross gains and no gross losses. During the three months ended September 30, 2019, there were no maturities or calls of debt securities available for sale.

During the nine months ended September 30, 2019, proceeds from the sale of debt securities available for sale totaled $31.8 million, resulting in $1.5 million of gross gains and no gross losses. During the nine months ended September 30, 2019, proceeds from one matured debt security available for sale totaled $797,000. During the nine months ended September 30, 2019 there were no calls of debt securities available for sale.

Debt securities available for sale having a carrying value of $800.9 million and $462.0 million, at September 30, 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 September 30, 2020 and December 31, 2019 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	September 30, 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	$	138,268	$	(367)	$	36,897	$	(76)	$	175,165	$	(443)
Corporate debt securities	993		(7)		4,503		(498)		5,496		(505)
Trust preferred securities	—		—		4,459		(540)		4,459		(540)
	$	139,261	$	(374)	$	45,859	$	(1,114)	$	185,120	$	(1,488)

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

6.    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 September 30, 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 September 30, 2020 totaled 41, compared with 97 at December 31, 2019. All temporarily impaired securities were investment grade at September 30, 2020 and December 31, 2019.

    The Company did not record an other-than-temporary impairment charge on debt securities available for sale during the three and nine months ended September 30, 2020 and 2019.

19

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

7.    Debt Securities Held to Maturity

    Debt securities held to maturity at September 30, 2020 and December 31, 2019 are summarized as follows:

	September 30, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
	(In thousands)
U.S. government and agency obligations	$	5,000	$	4	$	—	$	5,004
Mortgage-backed securities and collateralized mortgage obligations	$	267,712	$	15,754	$	(31)	$	283,435
	$	272,712	$	15,758	$	(31)	$	288,439

	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

At September 30, 2020, the amortized cost and fair value of U.S. government and agency obligations maturing in more than one year to five years totaled $5.0 million, respectively.

    Mortgage-backed securities and collateralized mortgage obligations totaling $267.7 million at amortized cost, and $283.4 million at fair value at September 30, 2020, are not classified by maturity as their expected lives are likely to be shorter than the contractual maturity date due to principal prepayments.

    During the three and nine months ended September 30, 2020, there were no sales or maturities of debt securities held to maturity. During both the three and nine months ended September 30, 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.

    During the three months ended September 30, 2019, there were no sales or maturities of debt securities held for maturity. During the three months ended September 30, 2019, proceeds from calls of debt securities held to maturity totaled $23.4 million, resulting in $24,000 of gross gains and no gross losses.

During the nine months ended September 30, 2019, there were no sales or maturities of debt securities held for maturity. During the nine months ended September 30, 2019, proceeds from calls of debt securities held to maturity totaled $28.4 million, resulting in $24,000 of gross gains and no gross losses.

    Debt securities held to maturity having a carrying value of $235.3 million and $236.0 million, at September 30, 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.

20

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

7.    Debt Securities Held to Maturity (continued)

The following tables summarize the fair value and gross unrealized losses of those securities that reported an unrealized loss at September 30, 2020 and December 31, 2019 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	September 30, 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	$	2,695	$	(6)	$	1,883	$	(25)	$	4,578	$	(31)

	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 September 30, 2020, nor is it more likely than not that the Company will be required to sell the securities before the anticipated recovery.

    There were three securities in an unrealized loss position at September 30, 2020, compared with 22 at December 31, 2019. All temporarily impaired securities were investment grade at September 30, 2020 and December 31, 2019.

    The Company did not record an other-than-temporary impairment charge on debt securities held to maturity during the three and nine months ended September 30, 2020 and 2019.

21

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

8.    Equity Securities at Fair Value

    The Company has an equity securities portfolio which consists of common 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 September 30, 2020 and December 31, 2019 was $4.7 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 (decrease) increase in the fair value of equity securities of $(4,000) and $55,000, during the three and nine months ended September 30, 2020, as a component of non-interest income. During the three and nine months ended September 30, 2019, the Company recorded a net (decrease) increase in the fair value of equity securities of $(59,000) and $189,000, respectively, as a component of non-interest income.

    During the three and nine months ended September 30, 2020, there were no sales of equity securities. During the three months ended September 30, 2019, proceeds from the sale of one equity security totaled $161,000, resulting in a gross gain of $70,000. During the nine months ended September 30, 2019, proceeds from sales of equity securities totaled $926,000, resulting in gross gains of $196,000 and no gross losses.

22

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

9.    Loans Receivable and Allowance for Loan Losses

    Loans receivable at September 30, 2020 and December 31, 2019 are summarized as follows:

	September 30,		December 31,
	2020		2019
	(In thousands)
Real estate loans:
One-to-four family	$	2,053,293	$	2,077,079
Multifamily and commercial	2,863,718		2,919,985
Construction	307,659		298,942
Commercial business loans	884,931		483,215
Consumer loans:
Home equity loans and advances	340,962		388,127
Other consumer loans	1,538		1,960
Total gross loans	6,452,101		6,169,308
Purchased credit-impaired loans	6,706		7,021
Net deferred loan costs, fees and purchased premiums and discounts	10,038		21,237
Loans receivable	$	6,468,845	$	6,197,566

    The Company had $4.1 million of small business administration loans held-for-sale at September 30, 2020. The Company had no loans held-for-sale at December 31, 2019. During the three months ended September 30, 2020, the Company sold $7.8 million of one-to-four family real estate loans held-for-sale, resulting in gross gains of $327,000 and no gross losses. During the nine months ended September 30, 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 three months ended September 30, 2019, the Company sold $49.1 million of one-to-four family real estate loans held-for-sale resulting in gross gains of $382,000 and no gross losses. During the nine months ended September 30, 2019, the Company sold $94.8 million of one-to-four family real estate loans held-for-sale resulting in gross gains of $710,000 and no gross losses.

    During the three months ended September 30, 2020, the Company sold one construction loan totaling $5.8 million included in loans receivable, resulting in no gross gains or losses. During the three months ended September 30, 2020, the Company sold one small business administration loan totaling $274,000 included in loans receivable, resulting in a gross gain of $23,000. During the nine months ended September 30, 2020, the Company sold $8.8 million of one-to-four family real estate loans, resulting in gross gains of $82,000 and no gross losses. During the nine months ended September 30, 2020, the Company sold construction loans totaling $12.5 million included in loans receivable, resulting in no gross gains or gross losses. During the nine months ended September 30, 2020, the Company sold commercial loans and small business administration loans totaling $7.6 million, resulting in gross gains of $78,000 and no gross losses. During the three and nine months ended September 30, 2019, the Company sold $2.3 million and $4.8 million, respectively of one-to-four family real estate and home equity loans included in loans receivable, resulting in no gross gains or gross losses. During the three and nine months ended September 30, 2019, the Company sold $5.5 million of commercial real estate loans included in loans receivable, resulting in no gross gains or gross losses.

     During the three and nine months ended September 30, 2020, there were no loans purchased by the Company. During the three months ended September 30, 2019, there were no loans purchased by the Company. During the nine months ended September 30, 2019, the Company purchased $5.0 million of one-to-four family real estate loan from third parties and purchased $24.9 million of commercial real estate loans from third parties.

    At September 30, 2020 commercial business loans included $474.9 million SBA Payroll Protection Program ("PPP") loans and net deferred loan fees totaling $11.2 million. At December 31, 2019 there were no SBA PPP loans.

23

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

9.    Loans Receivable and Allowance for Loan Losses (continued)

The Company has entered into guarantor swaps with Freddie Mac which results in improved liquidity. During the three and nine months ended September 30, 2020, the Company exchanged $48.5 million of loans for Freddie Mac mortgage participation certificates, resulting in gross gains of $1.5 million and no gross losses. During the three months ended September 30, 2019, no loans were securitized. During the nine months ended September 30, 2019 the Company exchanged $21.6 million of loans for a Freddie Mac mortgage participation certificate. The Company retained the servicing of these loans.

At September 30, 2020 and December 31, 2019, the carrying value of loans serviced by the Company for investors was $602.5 million and $526.3 million, respectively.

    The following tables summarize the aging of loans receivable by portfolio segment, including non-accrual loans and excluding PCI loans at September 30, 2020 and December 31, 2019:

	September 30, 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	$	4,347	$	542	$	1,760	$	6,649	$	2,881	$	2,043,763	$	2,053,293
Multifamily and commercial	600		1,772		2,798		5,170		2,995		2,855,553		2,863,718
Construction	80		—		—		80		—		307,579		307,659
Commercial business loans	2,910		2,643		2,698		8,251		4,536		872,144		884,931
Consumer loans:
Home equity loans and advances	1,610		186		323		2,119		499		338,344		340,962
Other consumer loans	1		1		—		2		—		1,536		1,538
Total loans	$	9,548	$	5,144	$	7,579	$	22,271	$	10,911	$	6,418,919	$	6,452,101

	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 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 September 30, 2020 and December 31, 2019, non-accrual loans totaled $10.9 million and $6.7 million, respectively. Included in non-accrual loans at September 30, 2020, are 22 loans totaling $3.9 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.

24

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

9.    Loans Receivable and Allowance for Loan Losses (continued)

    At September 30, 2020 and December 31, 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 accounted for at fair value at acquisition, based upon the present value of expected future cash flows, with no related allowance for loan losses. PCI loans acquired in the Stewardship acquisition totaled $5.9 million at September 30, 2020 and $6.9 million at December 31, 2019. PCI loans acquired in the Roselle acquisition totaled $179,000 at September 30, 2020.

    The following table presents changes in accretable yield for PCI loans for the three and nine months ended September 30, 2020. There were no PCI loans outstanding for the three and nine months ended September 30, 2019.

	Three Months Ended September 30, 2020		Nine Months Ended September 30, 2020
	(In thousands)
Balance at beginning of period	$	471	$	511
Acquisition	—		58
Accretion	(58)		(156)
Net change in expected cash flows	1		1
Balance at end of period	$	414	$	414

    We may obtain physical possession of real estate collateralizing a residential mortgage loan via foreclosure or through an in-substance repossession. At September 30, 2020 and December 31, 2019, the Company had no real estate owned. At September 30, 2020 and December 31, 2019 we had one and four residential mortgage loans with carrying values totaling $180,000 and $522,000, respectively, collateralized by residential real estate which are in the process of foreclosure.

25

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

9.    Loans Receivable and Allowance for Loan Losses (continued)

    The following tables summarize loans receivable (including PCI loans) and allowance for loan losses by portfolio segment and impairment method at September 30, 2020 and December 31, 2019:

	September 30, 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	$	406	$	550	$	—	$	871	$	12	$	—	$	1,839
Collectively evaluated for impairment	15,369		30,439		10,534		16,631		1,314		7		74,294
Loans acquired with deteriorated credit quality	—		—		—		—		—		—		—
Total	$	15,775	$	30,989	$	10,534	$	17,502	$	1,326	$	7	$	76,133
Total loans:
Individually evaluated for impairment	$	7,230	$	32,090	$	—	$	4,664	$	1,862	$	—	$	45,846
Collectively evaluated for impairment	2,046,063		2,831,628		307,659		880,267		339,100		1,538		6,406,255
Loans acquired with deteriorated credit quality	291		4,923		—		1,492		—		—		6,706
Total loans	$	2,053,584	$	2,868,641	$	307,659	$	886,423	$	340,962	$	1,538	$	6,458,807

26

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

9.    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.

27

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

9.    Loans Receivable and Allowance for Loan Losses (continued)

    The following table presents the number of loans modified as TDRs during the three and nine months ended September 30, 2020 and 2019, 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.

	For the Three Months Ended September 30,
	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	4	$	16,387	$	16,387	—	$	—	$	—
Commercial business loans	1	1,295		1,295		—	—		—
Total restructured loans	5	$	17,682	$	17,682	—	$	—	$	—

	For the Nine Months Ended September 30,
	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	4	$	16,387	$	16,387	—	$	—	$	—
Commercial business loans	2	11,507		12,802		1	4,095		4,095
Total restructured loans	6	$	27,894	$	29,189	1	$	4,095	$	4,095

28

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

9.    Loans Receivable and Allowance for Loan Losses (continued)

The activity in the allowance for loan losses by portfolio segment for the three and nine months ended September 30, 2020 and 2019 are as follows:

	For the Three Months Ended September 30,
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
2020
Balance at beginning of period	$	16,633	$	27,330	$	10,217	$	18,314	$	1,514	$	7	$	74,015
Provision charged (credited)	(758)		3,659		317		(573)		(129)		—		2,516
Recoveries	87		—		—		128		32		—		247
Charge-offs	(187)		—		—		(367)		(91)		—		(645)
Balance at end of period	$	15,775	$	30,989	$	10,534	$	17,502	$	1,326	$	7	$	76,133
2019
Balance at beginning of period	$	15,610	$	22,679	$	8,806	$	12,718	$	2,583	$	7	$	62,403
Provision charged (credited)	347		290		(1,047)		2,040		(474)		1		1,157
Recoveries	4		—		1		8		22		—		35
Charge-offs	(228)		—		—		(738)		—		—		(966)
Balance at end of period	$	15,733	$	22,969	$	7,760	$	14,028	$	2,131	$	8	$	62,629

29

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

9.    Loans Receivable and Allowance for Loan Losses (continued)

	For the Nine Months Ended September 30,
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
2020
Balance at beginning of period	$	13,780	$	22,980	$	7,435	$	15,836	$	1,669	$	9	$	61,709
Provision charged (credited)	2,292		7,998		3,098		4,685		(253)		—		17,820
Recoveries	329		12		1		211		55		—		608
Charge-offs	(626)		(1)		—		(3,230)		(145)		(2)		(4,004)
Balance at end of period	$	15,775	$	30,989	$	10,534	$	17,502	$	1,326	$	7	$	76,133
2019
Balance at beginning of period	$	15,232	$	23,251	$	7,217	$	14,176	$	2,458	$	8	$	62,342
Provision charged (credited)	1,215		(282)		541		485		(255)		1		1,705
Recoveries	29		—		2		374		29		—		434
Charge-offs	(743)		—		—		(1,007)		(101)		(1)		(1,852)
Balance at end of period	$	15,733	$	22,969	$	7,760	$	14,028	$	2,131	$	8	$	62,629

30

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

9.    Loans Receivable and Allowance for Loan Losses (continued)

    The following tables present loans individually evaluated for impairment by loan segment, excluding PCI loans, at September 30, 2020 and December 31, 2019:

	At September 30, 2020
	Recorded Investment		Unpaid Principal Balance		Specific Allowance
	(In thousands)
With no allowance recorded:
Real estate loans:
One-to-four family	$	2,825	$	3,616	$	—
Multifamily and commercial	20,389		20,426		—
Commercial business loans	2,577		2,680		—
Consumer loans:
Home equity loans and advances	708		845		—
	26,499		27,567		—
With a specific allowance recorded:
Real estate loans:
One-to-four family	4,405		4,420		406
Multifamily and commercial	11,701		12,316		550
Commercial business loans	2,087		5,429		871
Consumer loans:
Home equity loans and advances	1,154		1,154		12
	19,347		23,319		1,839
Total:
Real estate loans:
One-to-four family	7,230		8,036		406
Multifamily and commercial	32,090		32,742		550
Commercial business loans	4,664		8,109		871
Consumer loans:
Home equity loans and advances	1,862		1,999		12
Total loans	$	45,846	$	50,886	$	1,839

31

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

9.    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
	$	18,811	$	24,017	$	1,621

    Specific allocations of the allowance for loan losses attributable to impaired loans totaled $1.8 million and $1.6 million at September 30, 2020 and December 31, 2019, respectively. At September 30, 2020 and December 31, 2019, impaired loans for which there was no related allowance for loan losses totaled $26.5 million and $10.7 million, respectively.

    The recorded investment in TDRs totaled $44.1 million at September 30, 2020, of which one loan totaling $420,000 was 30-59 days past due, one loan totaling $262,000 was 60-89 days past due, and three loans totaling $910,000 were over 90 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 September 30, 2020. The recorded investment in TDRs totaled $20.0 million at December 31, 2019, of which there were no loans 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.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

9.    Loans Receivable and Allowance for Loan Losses (continued)

    The following tables present interest income recognized for loans individually evaluated for impairment, by loan segment, excluding PCI loans for the three and nine months ended September 30, 2020 and 2019:

	For the Three Months Ended September 30,
	2020				2019
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(In thousands)
Real estate loans:
One-to-four family	$	8,020	$	74	$	8,773	$	101
Multifamily and commercial	23,525		227		2,637		37
Construction	—		—		850		—
Commercial business loans	4,979		52		7,461		88
Consumer loans:
Home equity loans and advances	1,935		28		2,629		35
Total loans	$	38,459	$	381	$	22,350	$	261

	For the Nine Months Ended September 30,
	2020				2019
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(In thousands)
Real estate loans:
One-to-four family	$	8,175	$	226	$	9,144	$	340
Multifamily and commercial	20,670		653		2,667		111
Construction	—		—		850		—
Commercial business loans	5,468		196		5,848		268
Consumer loans:
Home equity loans and advances	1,995		85		2,866		122
Total loans	$	36,308	$	1,160	$	21,375	$	841

    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.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

9.    Loans Receivable and Allowance for Loan Losses (continued)

    The following tables present loans receivable by credit quality risk indicator and by loan segment, excluding PCI loans at September 30, 2020 and December 31, 2019:

	September 30, 2020
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Pass	$	2,046,613	$	2,828,021	$	307,659	$	869,122	$	340,047	$	1,538	$	6,393,000
Special mention	408		15,819		—		8,061		—		—		24,288
Substandard	6,272		19,878		—		7,748		915		—		34,813
Doubtful	—		—		—		—		—		—		—
Loss	—		—		—		—		—		—		—
Total	$	2,053,293	$	2,863,718	$	307,659	$	884,931	$	340,962	$	1,538	$	6,452,101

	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	—		—		—		—		—		—		—
Loss	—		—		—		—		—		—		—
Total	$	2,077,079	$	2,919,985	$	298,942	$	483,215	$	388,127	$	1,960	$	6,169,308

10.    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 5, Summary of Significant Accounting Policies, Accounting Pronouncements Adopted. The Company's leases primarily relate to real estate property for branches and office space. At September 30, 2020, all of the Company's leases are classified as operating leases.

    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 5 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 September 30, 2020, the weighted average remaining lease term for operating leases was 7.6 years and the weighted average discount rate used in the measurement of operating lease liabilities was 2.25%.

34

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

10.    Leases (continued)

    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 three and nine months ended September 30, 2020, operating and variable lease expenses totaled approximately $603,000 and $1.9 million, respectively.

    There were no sale and leaseback transactions, leveraged leases or lease transactions with related parties during the three and nine months ended September 30, 2020. At September 30, 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 September 30, 2020	Lease Payment Obligations
	(In thousands)
2020	$	1,037
2021	4,010
2022	3,624
2023	3,310
2024	2,586
Thereafter	8,534
Total undiscounted cash flows	23,101
Discount on cash flows	(2,093)
Total lease liability	$21,008

    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.

11.    Deposits

    Deposits at September 30, 2020 and December 31, 2019 are summarized as follows:

	September 30,		December 31,
	2020		2019
	(In thousands)
Non-interest-bearing demand	$	1,341,248	$	958,442
Interest-bearing demand	2,033,729		1,720,383
Money market accounts	540,723		410,392
Savings and club deposits	652,970		543,480
Certificates of deposit	2,060,978		2,013,145
Total deposits	$	6,629,648	$	5,645,842

Included in the above balances at September 30, 2020 and December 31, 2019 are certificates of deposit obtained through brokers, totaling $26.4 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 $1.1 billion at both September 30, 2020 and December 31, 2019. Interest expense on deposits for the three and nine months ended September 30, 2020 and 2019 totaled $12.8 million and $16.1 million, and $44.6 million and $45.0 million, respectively.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

11.    Deposits (continued)

    Scheduled maturities of certificates of deposit accounts at September 30, 2020 and December 31, 2019 are summarized as follows:

	September 30,		December 31,
	2020		2019
	(In thousands)
One year or less	$	1,543,088	$	1,293,613
After one year to two years	390,328		548,995
After two years to three years	55,389		142,458
After three years to four years	24,618		11,362
After four years	47,555		16,717
	$	2,060,978	$	2,013,145

12.    Stock Based Compensation

    At the Company's annual meeting of stockholders 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, 1,419,131 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 but 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.

    Restricted shares granted under the 2019 Plan generally vest in equal installments, over performance or service periods ranging from three to five years, beginning one 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 three and nine months ended September 30, 2020, approximately $1.4 million and $4.2 million, respectively, in expense was recognized in regard to these awards. During the three and nine months ended September 30, 2019, approximately $1.0 million in expense was recognized in regard to these awards. The expected future compensation expense related to the 1,236,074 non-vested restricted shares outstanding at September 30, 2020 is approximately $15.5 million over a weighted average period of 3.3 years.

    The following is a summary of the Company's restricted stock activity during the three and nine months ended September 30, 2020 and 2019:

	Number of Restricted Shares	Weighted Average Grant Date Fair Value
Non-vested at January 1, 2020	1,420,012	$	15.67
Grants	—	—
Forfeited	(881)	16.60
Non-vested at March 31, 2020	1,419,131	$	15.67
Forfeited	(240)	15.60
Non-vested at June 30, 2020	1,418,891	$	15.67
Vested	(167,427)	15.62
Forfeited	(15,390)	16.07
Non-vested at September 30, 2020	1,236,074	$	15.68

36

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

12.    Stock Based Compensation (Continued)

	Number of Restricted Shares	Weighted Average Grant Date Fair Value
Non-vested at January 1, 2019	—	$	—
Grants	1,389,570	15.60
Non-vested at September 30, 2019	1,389,570	$	15.60

On July 23, 2019, options to purchase 3,589,959 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 became 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 three and nine months ended September 30, 2020, approximately $808,000 and $2.4 million in expense was recognized in regard to these awards. During both the three and nine months ended September 30, 2019, approximately $601,000 in expense was recognized in regard to these awards. The expected future compensation expense related to the 2,999,767 non-vested options outstanding at September 30, 2020 is $12.1 million over a weighted average period of 8.8 years.

    The following is a summary of the Company's option activity during the three and nine months ended September 30, 2020 and 2019:

	Number of Stock Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding, January 1, 2020	3,784,044	$	15.67	9.6	$	4,812,490
Forfeited	(9,707)	15.60		—	—
Outstanding, March 31, 2020	3,774,337	$	15.67	9.3	$	—
Forfeited	(2,647)	15.60		—	—
Outstanding, June 30, 2020	3,771,690	$	15.67	9.1	$	—
Forfeited	(44,485)	15.95		—	—
Outstanding, September 30, 2020	3,727,205	$	15.67	8.8	$	—
Options exercisable at September 30, 2020	727,438	$	15.62	8.7	$	—

37

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

12.    Stock Based Compensation (Continued)

	Number of Stock Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding, January 1, 2019	—	$	—	—	$	—
Granted	3,707,901	15.60		9.8	704,501
Outstanding, September 30, 2019	3,707,901	$	15.60	9.8	$	704,501
Options exercisable at September 30, 2019	—	$	—	—	$	—

    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 three and nine months ended September 30, 2020 and 2019.

13.    Components of Net Periodic Benefit Cost

    Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") and Post-retirement Plan

    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 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 been closed to new hires. The Company also provides life insurance benefits to eligible employees under an endorsement split-dollar life insurance program.

    Net periodic benefit (income) cost for Pension Plan, RIM Plan, Post-retirement Plan and split-dollar life insurance arrangement plan benefits for the three and nine months ended September 30, 2020 and 2019, includes the following components:

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

13.    Components of Net Periodic Benefit Cost (continued)

	For the Three Months Ended September 30,
	Pension Plan				RIM Plan				Post-retirement Plan				Split-Dollar Life Insurance
	2020		2019		2020		2019		2020		2019		2020		2019		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	2,032	$	1,746	$	67	$	53	$	99	$	84	$	120	$	88	Compensation and employee benefits
Interest cost	1,824		2,090		102		116		171		207		135		114		Other non-interest expense
Expected return on plan assets	(5,908)		(5,802)		—		—		—		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		—		—		—		14		14		Other non-interest expense
Net loss	1,492		770		99		61		77		37		113		62		Other non-interest expense
Net periodic (income) benefit cost	$	(560)	$	(1,196)	$	268	$	230	$	347	$	328	$	382	$	278

	For the Nine Months Ended September 30,
	Pension Plan				RIM Plan				Post-retirement Plan				Split-Dollar Life Insurance
	2020		2019		2020		2019		2020		2019		2020		2019		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	5,906	$	4,748	$	201	$	159	$	297	$	252	$	346	$	264	Compensation and employee benefits
Interest cost	5,887		6,478		306		348		513		621		384		342		Other non-interest expense
Expected return on plan assets	(17,383)		(15,256)		—		—		—		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		—		—		—		42		42		Other non-interest expense
Net loss	3,054		2,300		297		183		231		111		339		186		Other non-interest expense
Net periodic (income) benefit cost	$	(2,536)	$	(1,730)	$	804	$	690	$	1,041	$	984	$	1,111	$	834

    For the three and nine months ended September 30, 2020, a $12.0 million contribution was made to the Pension Plan. The net periodic cost (income) for pension benefits, other post-retirement and split dollar life insurance benefits for the three and nine months ended September 30, 2020 were calculated using the most recent available benefit valuations.

    Through the acquisition of the Roselle entities, the Company acquired a non-contributory defined benefit supplemental executive retirement plan with the only participant being a former president of Roselle Bank. For the three and nine months ended September 30, 2020 the Company recorded a net periodic benefit cost of $4,000 and $8,000, respectively, in connection with this plan.

39

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

14.    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 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 at September 30, 2020 and December 31, 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.

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.

40

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

14.    Fair Value Measurements (continued)

In addition, Level 2 instruments include Atlantic Community Bankers Bank ("ACCB") stock, which is based on redemption at par value and can only be sold to the issuing ACBB or another institution that holds 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 16 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 at September 30, 2020 and December 31, 2019, by level within the fair value hierarchy:

	September 30, 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	$	30,668	$	30,668	$	—	$	—
Mortgage-backed securities and collateralized mortgage obligations	1,134,106		—		1,134,106		—
Municipal obligations	1,885		—		1,885		—
Corporate debt securities	74,181		—		74,181		—
Trust preferred securities	4,460		—		4,460		—
Total debt securities available for sale	1,245,300		30,668		1,214,632		—
Equity securities	4,706		4,379		327		—
Derivative assets	22,305		—		22,305		—
	$	1,272,311	$	35,047	$	1,237,264	$	—
Derivative liabilities	$	47,873	$	—	$	47,873	$	—

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

14.    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 September 30, 2020 and December 31, 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 at September 30, 2020 and December 31, 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 6.0% and 8.0%. 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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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

14.    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 September 30, 2020 and December 31, 2019, by level within the fair value hierarchy:

	September 30, 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)
Impaired loans	$	708	$	—	$	—	$	708
Mortgage servicing rights	$	774	$	—	$	—	$	774
	$	1,482	$	—	$	—	$	1,482

	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

    At September 30, 2020, there were no impaired loans or real estate owned 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 September 30, 2020 and December 31, 2019:

	September 30, 2020
	Fair Value		Valuation Methodology	Unobservable Inputs	Range of Inputs	Weighted Average
	(Dollars in thousands)
Impaired loans	$	708	Estimated cash flow	Expected value of future cash flows (1)	—%	—%
Mortgage servicing rights	$	774	Estimated cash flow	Prepayment speeds and discount rates(3)	8.9% - 27.7%	18.3%

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

14.    Fair Value Measurements (continued)

	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 (2)	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 11.75%.
(3) Value of SBA servicing rights based on a discount rate of 10.25%.

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 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 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.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

14.    Fair Value Measurements (continued)

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 non-performing loans deemed significant 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.

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.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

14.    Fair Value Measurements (continued)

    The following tables present the assets and liabilities reported on the Consolidated Statements of Financial Condition at their fair values at September 30, 2020 and December 31, 2019:

	September 30, 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	$	265,896	$	265,896	$	265,896	$	—	$	—
Debt securities available for sale	1,245,300		1,245,300		30,668		1,214,632		—
Debt securities held to maturity	272,712		288,439		5,004		283,435		—
Equity securities	4,706		4,706		4,379		327		—
Federal Home Loan Bank stock	53,416		53,416		—		53,416		—
Loans receivable, net	6,392,712		6,657,586		—		—		6,657,586
Financial liabilities:			—
Deposits	$	6,629,648	$	6,649,238	$	—	$	6,649,238	$	—
Borrowings	1,015,210		1,027,590		—		1,027,590		—
Derivative liabilities	47,873		47,873		—		47,873		—

	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		—

46

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

14.    Fair Value Measurements (continued)

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 intangibles assets, deferred tax assets, office properties and equipment, and bank-owned life insurance.

47

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

15.    Other Comprehensive Income (Loss)

    The following tables present the components of other comprehensive (loss) income, both gross and net of tax, for the three and nine months ended September 30, 2020 and 2019:

	For the Three Months Ended September 30,
	2020						2019
	Before Tax		Tax Effect		After Tax		Before Tax		Tax Effect		After Tax
	(In thousands)
Components of other comprehensive (loss) income:
Unrealized (losses) gains on debt securities available for sale:	$	(3,688)	$	775	$	(2,913)	$	6,186	$	(1,271)	$	4,915
Accretion of unrealized gain on debt securities reclassified as held to maturity	(4)		—		(4)		2		—		2
Reclassification adjustment for gains included in net income	—		—		—		1,256		(291)		965
	(3,692)		775		(2,917)		7,444		(1,562)		5,882
Derivatives:
Unrealized gain (loss) on swap contracts accounted for as cash flow hedges	2,256		(471)		1,785		(1,619)		340		(1,279)
	2,256		(471)		1,785		(1,619)		340		(1,279)
Employee benefit plans:
Amortization of prior service cost included in net income	(14)		3		(11)		(14)		3		(11)
Reclassification adjustment of actuarial net gain included in net income	(1,071)		225		(846)		(930)		195		(735)
Change in funded status of retirement obligations	(41,434)		8,701		(32,733)		1,887		(397)		1,490
	(42,519)		8,929		(33,590)		943		(199)		744
Total other comprehensive (loss) income	$	(43,955)	$	9,233	$	(34,722)	$	6,768	$	(1,421)	$	5,347

48

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

15.    Other Comprehensive Income (Loss) (continued)

	For the Nine Months Ended September 30,
	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:	$	28,736	$	(6,031)	$	22,705	$	35,781	$	(7,479)	$	28,302
Accretion of unrealized gain on debt securities reclassified as held to maturity	1		—		1		13		(3)		10
Reclassification adjustment for gains included in net income	370		(81)		289		1,721		(396)		1,325
	29,107		(6,112)		22,995		37,515		(7,878)		29,637
Derivatives:
Unrealized (loss) on swap contracts accounted for as cash flow hedges	(13,050)		2,736		(10,314)		(11,059)		2,324		(8,735)
	(13,050)		2,736		(10,314)		(11,059)		2,324		(8,735)
Employee benefit plans:
Amortization of prior service cost included in net income	(42)		10		(32)		(42)		9		(33)
Reclassification adjustment of actuarial net (loss) included in net income	(3,213)		674		(2,539)		(2,779)		583		(2,196)
Change in funded status of retirement obligations	(37,093)		7,789		(29,304)		(2,785)		585		(2,200)
	(40,348)		8,473		(31,875)		(5,606)		1,177		(4,429)
Total other comprehensive (loss) income	$	(24,291)	$	5,097	$	(19,194)	$	20,850	$	(4,377)	$	16,473

49

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

15.    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 three and nine months ended September 30, 2020 and 2019:

	For the Three Months Ended September 30,
	2020								2019
	Unrealized Gains on Debt Securities Available for Sale		Unrealized (Losses) on Swaps		Employee Benefit Plans		Accumulated Other Comprehensive (Loss)		Unrealized 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	$	35,225	$	(20,573)	$	(67,859)	$	(53,207)	$	9,981	$	(9,462)	$	(61,838)	$	(61,319)
Current period changes in other comprehensive income (loss)	(2,917)		1,785		(33,590)		(34,722)		5,882		(1,279)		744		5,347
Total other comprehensive income (loss)	$	32,308	$	(18,788)	$	(101,449)	$	(87,929)	$	15,863	$	(10,741)	$	(61,094)	$	(55,972)

	For the Nine Months Ended September 30,
	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	$	9,313	$	(8,474)	$	(69,574)	$	(68,735)	$	(13,226)	$	(2,006)	$	(56,665)	$	(71,897)
Effect of adoption of ASU 2016-01	—		—		—		—		(548)		—		—		(548)
Balance at January 1,	9,313		(8,474)		(69,574)		(68,735)		(13,774)		(2,006)		(56,665)		(72,445)
Current period changes in other comprehensive income (loss)	22,995		(10,314)		(31,875)		(19,194)		29,637		(8,735)		(4,429)		16,473
Total other comprehensive income (loss)	$	32,308	$	(18,788)	$	(101,449)	$	(87,929)	$	15,863	$	(10,741)	$	(61,094)	$	(55,972)

50

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

15.    Other Comprehensive Income (Loss) (continued)

    The following tables reflect amounts reclassified from accumulated other comprehensive income (loss) to the Consolidated Statements of Income and the affected line item in the statement where net income is presented for the three and nine months ended September 30, 2020 and 2019:

	Accumulated Other Comprehensive Income (Loss) Components
	For the Three Months Ended September 30,				Affected Line Items in the Consolidated Statements of Income
	2020		2019
	(In thousands)
Reclassification adjustment for gains included in net income	$	—	$	1,256	Gain on securities transactions
Reclassification adjustment of actuarial net (loss) included in net income	(1,071)		(930)		Other non-interest expense
Total before tax	(1,071)		326
Income (tax) benefit	225		(96)
Net of tax	$	(846)	$	230

	Accumulated Other Comprehensive Income (Loss) Components
	For the Nine Months Ended September 30,				Affected Line Items in the Consolidated Statements of Income
	2020		2019
	(In thousands)
Reclassification adjustment for gains included in net income	$	370	$	1,721	Gain on securities transactions
Reclassification adjustment of actuarial net (loss) included in net income	(3,213)		(2,779)		Other non-interest expense
Total before tax	(2,843)		(1,058)
Income (tax) benefit	593		187
Net of tax	$	(2,250)	$	(871)

51

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

16.    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 risk 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 September 30, 2020 and December 31, 2019, the Company had no currency forward contracts in place with commercial banking customers.

    Interest Rate Swaps. At September 30, 2020, the Company had interest rate swaps in place with 46 commercial banking customers executed by offsetting interest rate swaps with third parties, with an aggregated notional amount of $170.9 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 September 30, 2020 and December 31, 2019, the Company had 32 and 29 interest rate swaps with notional amounts of $445.0 million and $410.0 million, respectively, hedging certain FHLB advances. These interest rate swaps meet the cash flow hedge accounting requirements. Interest rate swaps designated as cash flow hedges involve the receipt of variable amounts from a counter-party in exchange for the Company making fixed-rate payments over the life of the agreements without the exchange of the underlying notional amount.

    For the three and nine months ended September 30, 2020 and 2019, the Company did not record any hedge ineffectiveness associated with these contracts.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

16.    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 September 30, 2020 and December 31, 2019:

	September 30, 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	$	22,305	Other Liabilities	$	47,873
Total derivative instruments		$	22,305		$	47,873

	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 three months ended September 30, 2020 and 2019, (gains)/losses of $(44,000) and $75,000, respectively, were recorded for changes in fair value of interest rate swaps with third parties. For the nine months ended September 30, 2020 and 2019, losses of $406,000 and $288,000, respectively, were recorded for changes in fair value of interest rate swaps with third parties.

    At September 30, 2020 and December 31, 2019, accrued interest was $1.1 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 September 30, 2020, the termination value of derivatives in a net liability position, which includes accrued interest, was $24.5 million. The Company has collateral posting thresholds with certain of its derivative counterparties, and has posted collateral of $47.1 million against its obligations under these agreements.

17.    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.    

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

17.     Revenue Recognition (continued)

    The following table presents non-interest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the three and nine months ended September 30, 2020 and 2019.

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2020		2019		2020		2019
	(In thousands)
Non-interest income
In-scope of Topic 606:
Demand deposit account fees	$	787	$	1,106	$	2,706	$	3,116
Title insurance fees	1,218		1,350		3,445		3,490
Other non-interest income	1,749		1,189		4,688		3,467
Total in-scope non-interest income	3,754		3,645		10,839		10,073
Total out-of-scope non-interest income	4,155		6,470		10,469		12,855
Total non-interest income	$	7,909	$	10,115	$	21,308	$	22,928

    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 on loan level interest rate 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.

18.    Subsequent Events

    The Company has evaluated events subsequent to September 30, 2020 and through the financial statement issuance date of November 9, 2020. 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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Forward-Looking Statements

    Certain statements contained herein are “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Such forward-looking statements may be identified by reference to a future period or periods, or by the use of forward-looking terminology, such as “may,” “will,” “believe,” “expect,” “estimate,” "project," "intend," “anticipate,” “continue,” or similar terms or variations on those terms, or the negative of those terms. Forward-looking statements are subject to numerous risk factors and uncertainties, including, but not limited to, those set forth in Item 1A of the Company's Annual Report on Form 10-K as supplemented by its Quarterly Reports on Form 10-Q, and those related to the economic environment, particularly in the market areas in which the Company operates, competitive products and pricing, the outcome of the recent presidential election, as well as its impact on fiscal and monetary policies of the U.S. Government, changes in government regulations affecting financial institutions, including regulatory fees and capital requirements, changes in prevailing interest rates, acquisitions and the integration of acquired businesses, credit risk management, the effect of the COVID-19 pandemic (including its impact on our borrowers and their ability to repay their loans, and on the local and national economies), asset-liability management, the financial and securities markets, and the availability of and costs associated with sources of liquidity.

    The Company cautions readers not to place undue reliance on any such forward-looking statements which speak only as of the date made. The Company also advises readers that the factors listed above could affect the Company’s financial performance and could cause the Company’s actual results for future periods to differ materially from any opinions or statements expressed with respect to future periods in any current statements. The Company does not have any obligation to update any forward-looking statements to reflect any subsequent events or circumstances after the date of this statement.

Comparison of Financial Condition at September 30, 2020 and December 31, 2019

Total assets increased $676.8 million, or 8.3%, to $8.9 billion at September 30, 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 $190.3 million, debt securities available for sale of $147.0 million, loans receivable, net, of $256.9 million, bank-owned life insurance of $21.7 million, goodwill and intangible assets of $23.9 million, and other assets of $47.1 million, partially offset by decreases of $13.0 million in securities held to maturity and $16.2 million in Federal Home Loan Bank stock.

Cash and cash equivalents increased $190.3 million, or 252.0% to $265.9 million at September 30, 2020 from $75.5 million at December 31, 2019. The increase was primarily attributable to $155.2 million in cash acquired due to the Roselle merger, and strong growth in deposits, partially offset by $60.3 million in repurchases of common stock under our stock repurchase program.

Debt securities available for sale increased $147.0 million, or 13.4%, to $1.2 billion at September 30, 2020 from $1.1 billion at December 31, 2019. The increase was attributable to $51.5 million of investments acquired in the Roselle merger and purchases of $201.5 million in mortgage-backed securities, partially offset by maturities and calls of $12.4 million in U.S. agency obligations and municipal securities, repayments of $149.8 million, and sales of $20.8 million. The gross unrealized gain on debt securities available for sale increased by $29.7 million during the nine months ended September 30, 2020.

Loans receivable, net, increased $256.9 million, or 4.2%, to $6.4 billion at September 30, 2020 from $6.1 billion at December 31, 2019. The increase included $171.6 million of loans which were acquired due to the Roselle merger, which mainly consisted of one-to-four family real estate loans. The increases in construction and commercial business loans of $8.7 million, and $401.7 million, respectively, were partially offset by decreases in one-to-four family real estate loans, multifamily and commercial real estate and home equity loans and advances of $23.8 million, $56.3 million and $47.2 million, respectively. A significant portion of the increase in commercial business loans included loans granted as part of the SBA Paycheck Protection Program, which totaled $474.9 million at September 30, 2020. The allowance for loan loss balance increased $14.4 million to $76.1 million at September 30, 2020 from $61.7 million at December 31, 2019, which was primarily attributable to consideration of the deterioration of economic conditions and loan performance due to the ongoing COVID-19 pandemic resulting from increases to qualitative factors. The current allowance for loan losses was calculated utilizing the existing incurred loss methodology.

Bank-owned life insurance increased $21.7 million, or 10.3%, to $233.1 million at September 30, 2020 from $211.4 million at December 31, 2019. The increase was primarily attributable to $17.2 million acquired in connection with the Roselle merger.

Goodwill and intangible assets increased $23.9 million, or 34.9%, to $92.5 million at September 30, 2020 from $68.6 million at December 31, 2019. The increase was primarily attributable to $23.8 million in goodwill recorded in connection with the Roselle merger.

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Other assets increased $47.1 million, or 32.4%, to $192.8 million at September 30, 2020 from $145.7 million at December 31, 2019. The increase in other assets consisted of a $19.9 million balance of a right-of-use asset recognized in connection with the adoption of Accounting Standards Update 2016-02-Leases ("ASU 2016-02"), a $28.7 million increase in the collateral balance related to our swap agreement obligations, and a $16.2 million increase in interest rate swap fair value adjustments, partially offset by a decrease of $26.8 million in the Company's prepaid pension plan balance. An adjustment of $43.6 million was made to the Company's pension plan balance reflecting the revaluation impact related to the voluntary employee retirement program, partially offset by a $12.0 million contribution made to the plan in September 2020.

Total liabilities increased $642.0 million, or 8.9%, to $7.8 billion at September 30, 2020 from $7.2 billion at December 31, 2019. The increase was primarily attributable to an increase in total deposits of $983.8 million, or 17.4%, and an increase in accrued expenses and other liabilities of $51.2 million, or 43.5%, partially offset by a decrease in borrowings of $391.8 million, or 27.8%. The increase in total deposits was partially driven by $333.2 million in deposits assumed in connection with the Roselle merger. Non-interest-bearing and interest-bearing demand deposits increased $382.8 million and $313.3 million, respectively. Money market accounts, savings and club deposits, and certificates of deposits also increased $130.3 million, $109.5 million and $47.8 million, respectively, during the period. The increase in accrued expenses and other liabilities consisted of a $21.0 million lease liability recognized in connection with the adoption of ASU 2016-02, and a $29.6 million increase in interest rate swap liabilities. The decrease in borrowings was primarily driven by maturing long-term borrowings of $181.3 million, a net decrease in short-term borrowings of $321.6 million, and a payoff of $16.6 million of subordinated notes, partially offset by new long-term borrowings of $90.0 million and $ 37.7 million in borrowings assumed from Roselle.

Total stockholders’ equity increased $34.8 million, or 3.5%, to $1.0 billion at September 30, 2020 from $982.5 million at December 31, 2019. The net increase was primarily attributable to net income of $36.9 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 Roselle merger, and improved fair values on debt securities within our available for sale portfolio of $23.0 million, partially offset by the repurchase of 4,081,132 shares of common stock totaling $60.3 million under our stock repurchase program.     

Comparison of Results of Operations for the Quarter Ended September 30, 2020 and September 30, 2019

Net income of $15.1 million was recorded for the quarter ended September 30, 2020, an increase of $869,000, or 6.1%, compared to net income of $14.2 million for the quarter ended September 30, 2019. The increase in net income was primarily attributable to a $14.6 million increase in net interest income partially offset by a $2.2 million decrease in non-interest income, a $1.4 million increase in the provision for loan losses, and a $10.3 million increase in non-interest expense.

Net interest income was $56.3 million for the quarter ended September 30, 2020, an increase of $14.6 million, or 35.0%, from $41.7 million for the quarter ended September 30, 2019. The increase in net interest income was primarily attributable to an $8.5 million increase in interest income, compounded by a $6.1 million decrease in interest expense. The increase in interest income for the quarter ended September 30, 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 and Roselle, partially offset by decreases in the average yields on these assets. Prepayment penalties, which are included in interest income on loans, totaled $380,000 for the quarter ended September 30, 2020, compared to $758,000 for the quarter ended September 30, 2019.

The average yield on loans for the quarter ended September 30, 2020 decreased 31 basis points to 3.85%, as compared to 4.16% for the quarter ended September 30, 2019, while the average yield on securities for the quarter ended September 30, 2020 decreased 41 basis points to 2.38%, as compared to 2.79% for the quarter ended September 30, 2019. The average yield on other interest-earning assets for the quarter ended September 30, 2020 decreased 484 basis points to 1.26%, as compared to 6.10% for the quarter ended September 30, 2019, as there were substantially higher cash balances in low yielding bank accounts in the 2020 period. Decreases in the average yields on these portfolios for the quarter ended September 30, 2020 were influenced by the lower interest rate environment as the Federal Reserve reduced interest rates by 75 basis points in the third and fourth quarters of 2019, and in response to COVID-19, reduced interest rates again by 150 basis points in March 2020.

Total interest expense was $16.6 million for the quarter ended September 30, 2020, a decrease of $6.1 million, or 26.9%, from $22.7 million for the quarter ended September 30, 2019. The decrease in interest expense was primarily attributable to a 64 basis point decrease in the average cost of interest-bearing deposits which was partially offset by the impact from the increase in the average balance of deposits. The decrease in the cost of deposits was driven by both an inflow of lower costing deposits and the repricing of existing deposits at lower interest rates. Interest on borrowings decreased $2.9 million due to a decrease in the average balance of borrowings coupled with a 99 basis point decrease in the cost of these borrowings due to a lower interest rate environment. During the quarter, excess liquidity was used to repay long-term high rate borrowings as they matured.

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The Company's net interest margin for the quarter ended September 30, 2020 increased 18 basis points to 2.70%, when compared to 2.52% for the quarter ended September 30, 2019. The weighted average yield on interest-earning assets decreased 39 basis points to 3.50% for the quarter ended September 30, 2020 as compared to 3.89% for the quarter ended September 30, 2019. The average cost of interest-bearing liabilities decreased 73 basis points to 1.04% for the quarter ended September 30, 2020 as compared to 1.77% for the quarter ended September 30, 2019. The decreases in yields and costs for the quarter ended September 30, 2020 were largely driven by a continued lower interest rate environment. The net interest margin increased for the quarter as the cost of interest-bearing liabilities repriced lower more rapidly than the yields on interest-earning assets.

The provision for loan losses was $2.5 million for the quarter ended September 30, 2020, an increase of $1.4 million, from $1.2 million for the quarter ended September 30, 2019. The increase 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 risk factors.

Non-interest income was $7.9 million for the quarter ended September 30, 2020, a decrease of $2.2 million, or 21.8%, from $10.1 million for the quarter ended September 30, 2019. The decrease is primarily attributable to a $2.5 million decrease in loan fees and service charges during the quarter and a $1.3 million decrease in gain on securities transactions, partially offset by a $1.5 million increase in gain on sale of loans. Loan fees and service charges were lower due to the decrease in fees related to customer swaps and the impact of the COVID-19 pandemic.

Non-interest expense was $41.4 million for the quarter ended September 30, 2020, an increase of $10.3 million, or 33.2%, from $31.1 million for the quarter ended September 30, 2019. The increase was primarily attributable to an increase in compensation and employee benefits expense of $5.3 million, an increase in occupancy expense of $850,000, and an increase in other non-interest expense of $3.6 million. The increase in compensation and employee benefits expense was primarily attributable to an increase of $3.0 million in expense recorded in connection with a voluntary early retirement program which offered early retirement incentives for qualified Bank employees. The increase in occupancy expense was primarily the result of an increase in the number of branch offices acquired from Stewardship and Roselle. The increase in other non-interest expense includes $1.9 million related to interest rate swap transactions.

Income tax expense was $5.3 million for the quarter ended September 30, 2020, a decrease of $140,000, or 1.0%, as compared to $5.4 million for the quarter ended September 30, 2019. The Company's effective tax rate was 25.8% and 27.5% for the quarters ended September 30, 2020 and 2019, respectively.

Results of Operations for the Nine Months Ended September 30, 2020 and September 30, 2019

Net income of $36.9 million was recorded for the nine months ended September 30, 2020, a decrease of $4.2 million, or 10.2%, compared to net income of $41.2 million for the nine months ended September 30, 2019. The decrease in net income was primarily attributable to a $16.1 million increase in provision for loan losses and a $24.9 million increase in non-interest expense, partially offset by a $38.0 million increase in net interest income.

Net interest income was $162.9 million for the nine months ended September 30, 2020, an increase of $38.0 million, or 30.4%, from $124.9 million for the nine months ended September 30, 2019. The increase in net interest income was primarily attributable to a $33.2 million increase in interest income and a $4.8 million decrease in interest expense. The increase in interest income for the nine months ended September 30, 2020 was largely due to increases in the average balances on loans, securities and other interest-earning assets, which were the result of internal growth and the acquisitions of Stewardship and Roselle, partially offset by decreases in the average yields on these assets. Prepayment penalties, which are included in interest income on loans, totaled $2.0 million for the nine months ended September 30, 2020, compared to $1.6 million for the nine months ended September 30, 2019.

The average yield on loans for the nine months ended September 30, 2020 decreased 20 basis points to 3.98%, as compared to 4.18% for the nine months ended September 30, 2019, while the average yield on securities for the nine months ended September 30, 2020 decreased 32 basis points to 2.55%, as compared to 2.87% for the nine months ended September 30, 2019. The average yield on other interest-earning assets for the nine months ended September 30, 2020 decreased 385 basis points to 2.45%, as compared to 6.30% for the nine months ended September 30, 2019. Decreases in the average yields on these portfolios for the nine months ended September 30, 2020 were influenced by the lower interest rate environment.

Total interest expense was $60.3 million for the nine months ended September 30, 2020, a decrease of $4.8 million, or 7.37%, from $65.1 million for the nine months ended September 30, 2019. The decrease in interest expense on deposits was primarily attributable to a 37 basis point decrease in the average cost of interest-bearing deposits which was partially offset by the impact from the increase in the average balance of deposits. The decrease in the cost of deposits was driven by both an inflow of lower costing

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deposits and the repricing of existing deposits at a significantly reduced rate. Interest on borrowings decreased $4.4 million due to a 72 basis point decrease in the cost of these borrowings due to a lower interest rate environment, which was partially offset by an increase in the average balance of borrowings.

The Company's net interest margin for the nine months ended September 30, 2020 increased 12 basis points to 2.70%, when compared to 2.58% for the nine months ended September 30, 2019. The weighted average yield on interest-earning assets decreased 24 basis points to 3.69% for the nine months ended September 30, 2020 as compared to 3.93% for the nine months ended September 30, 2019. The average cost of interest-bearing liabilities decreased 46 basis points to 1.28% for the nine months ended September 30, 2020 as compared to 1.74% for the nine months ended September 30, 2019. The decreases in yields and costs for the nine months ended September 30, 2020 were largely driven by a lower interest rate environment. The net interest margin increased for the nine months ended September 30, 2020 as the cost of interest-bearing liabilities repriced lower more rapidly than the yields on interest-earning assets.

The provision for loan losses was $17.8 million for the nine months ended September 30, 2020, an increase of $16.1 million, from $1.7 million for the nine months ended September 30, 2019. The increase 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.

Non-interest income was $21.3 million for the nine months ended September 30, 2020, a decrease of $1.6 million, or 7.1%, from $22.9 million for the nine months ended September 30, 2019. The decrease was primarily attributable to decreases in loan fees and service charges of $3.5 million and gain on securities transactions of $1.4 million partially offset by increases in gain on sale of loans of $2.7 million and other non-interest income of $1.1 million. Loan fees and service charges were lower due to the decrease in fees related to customer swaps and the impact of the COVID-19 pandemic.

Non-interest expense was $117.3 million for the nine months ended September 30, 2020, an increase of $24.9 million, or 26.9%, from $92.5 million for the nine months ended September 30, 2019. The increase was primarily attributable to an increase in compensation and employee benefits expense of $15.1 million, occupancy expense of $2.7 million, and other non-interest expense of $6.8 million. The increase in compensation and employee benefits expense was primarily attributable to an increase of $4.6 million in expense recorded in connection with grants made under the Company's 2019 Equity Incentive Plan and an increase in expense due to a larger number of employees in the 2020 period, which included continuing employees of Stewardship and Roselle. In addition, $3.0 million in expense was recorded in connection with a voluntary early retirement program which offered early retirement incentives for qualified Bank employees. The increase in occupancy expense was primarily the result of an increase in the number of branch offices acquired from Stewardship and Roselle, and the increase in other non-interest expense was due to losses of $1.3 million recorded in connection with the branch consolidation resulting from the Stewardship merger and also includes $4.0 million related to interest rate swap transactions.

Income tax expense was $12.1 million for the nine months ended September 30, 2020, a decrease of $427,000, or 3.4%, as compared to $12.5 million for the nine months ended September 30, 2019. The Company's effective tax rate was 24.7% and 23.3% for the nine months ended September 30, 2020 and 2019, respectively.

Asset Quality

The Company's non-performing loans at September 30, 2020 totaled $10.9 million, or 0.17% of total gross loans, as compared to $6.7 million, or 0.11% of total gross loans, at December 31, 2019. The $4.2 million increase in non-performing loans was primarily attributable to increases of $1.1 million in non-performing one-to-four family real estate loans, $2.3 million in non-performing multifamily and commercial real estate loans and $850,000 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 17 non-performing loans at September 30, 2020. The increase in non-performing multifamily and commercial real estate loans was due to an increase in the number of loans from seven non-performing loans at December 31, 2019 to 12 non-performing loans at September 30, 2020. The increase in non-performing commercial business loans was due to an increase in the number of loans from 16 non-performing loans at December 31, 2019 to 31 non-performing loans at September 30, 2020. Non-performing assets as a percentage of total assets totaled 0.12% at September 30, 2020 as compared to 0.08% at December 31, 2019.

For the quarter ended September 30, 2020, net charge-offs totaled $397,000 as compared to $931,000 for the quarter ended September 30, 2019. For the nine months ended September 30, 2020, net charge-offs totaled $3.4 million as compared to $1.4 million for the nine months ended September 30, 2019. The increase in net charge-offs during the nine month period was primarily attributable to a $2.8 million charge-off of one commercial business loan.

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The Company's allowance for loan losses was $76.1 million, or 1.18% of total loans, at September 30, 2020, compared to $61.7 million, or 1.00% of total loans, at December 31, 2019. The increase in the allowance for loan losses is primarily attributable to consideration of economic conditions and loan performance due to the ongoing COVID-19 pandemic which resulted in increases to qualitative factors and, to a lesser extent, due to the growth in the Bank's loan portfolio.

COVID-19

Through September 30, 2020, the Company granted $802.5 million of commercial loan modification requests with respect to multifamily, commercial, and construction real estate loans, and $197.4 million of consumer-related loan modification requests with respect to one-to-four family real estate loans and home equity loans and advances for our customers affected by the COVID-19 pandemic. These short-term loan modifications will be 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, these loans will continue to accrue interest and will not be tested for impairment during the short-term modification period. 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 July 21, 2020		Percent of Total Loans at June 30, 2020		Balance at September 30, 2020		Percent of Total Loans at September 30, 2020		Balance at October 21, 2020		Percent of Total Loans at October 21, 2020
	(Dollars in thousands)
Real estate loans:
One-to-four family	$	73,502	3.40	%	$	43,515	2.12	%	$	21,461	1.06	%
Multifamily and commercial	447,925		15.59		88,031		3.07		85,482		3.05
Construction	13,525		4.14		13,525		4.40		3,400		1.08
Commercial business loans	34,059		3.79		9,479		1.07		1,850		0.21
Home equity loans and advances	8,427		2.34		1,574		0.46		1,088		0.32
Total loans	$	577,438	8.72	%	$	156,124	2.42	%	$	113,281	1.78	%

At October 21, 2020, $80.8 million of the commercial loans in the above table are remitting partial payments and $48.6 million were granted an additional deferral period of which $46.5 million are remitting payments.

Through September 30, 2020, the Company originated 2,449 loans for $488.5 million under the SBA Paycheck Protection Program. While some borrower applications for forgiveness were filed during the third quarter of 2020, none were approved until October 2020.

Critical Accounting Policies

    The Company considers certain accounting policies to be critically important to the fair presentation of its Consolidated Statements of Financial Condition and Consolidated Statements of Income. These policies require management to make judgments on matters which by their nature have elements of uncertainty. The sensitivity of the Company’s consolidated financial statements to these critical accounting policies, and the assumptions and estimates applied, could have a significant impact on its financial condition and results of operations. These assumptions, estimates and judgments made by management can be influenced by a number of factors, including the general economic environment. The Company has identified the following as critical accounting policies:

▪Adequacy of the allowance for loan losses

▪Valuation of deferred tax assets

▪Valuation of retirement and post-retirement benefits

    The calculation of the allowance for loan losses is a critical accounting policy of the Company. The allowance for loan losses is a valuation account that reflects management’s evaluation of the probable losses in the loan portfolio. Determining the amount of the allowance for loan losses involves a high degree of judgment. Estimates required to establish the allowance include: the overall economic environment, value of collateral, strength of guarantors, loss exposure in the event of default, the amount and timing of

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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. As previously mentioned, the Company elected to defer the adoption of the CECL methodology permitted by the recently enacted CARES Act. The Company expects to adopt CECL on December 31, 2020.

    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 loan portfolio by certain risk characteristics such as loan type (residential mortgage, commercial mortgage, construction, commercial, etc.) and loan risk rating.

    When assigning a risk rating to a loan, management utilizes an eight-point internal risk rating system. Loans deemed to be “acceptable quality” are rated 1 through 4, with a rating of 1 established for loans with minimal risk. Loans 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 internal loan review department. The Company requires an annual review be performed above certain dollar thresholds, depending on loan type, to help determine the appropriate risk rating. Results 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 qualitative 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, 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, 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.

    Although management believes that the Company has 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. 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 judgment.

    We assessed the impact of the pandemic on the Company’s financial condition, including its determination of the allowance for loan losses as of September 30, 2020. As part of that assessment, the Company considered the effects of the pandemic on economic conditions such as increasing unemployment rates and the shut-down of all non-essential businesses. The Company also analyzed the impact of COVID-19 on its primary market as well as the impact on the Company’s market sectors and its specific customers. As part of its estimation of an adjustment to the allowance due to COVID-19, the Company identified those market sectors

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Item 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

or industries that were more likely to be affected, such as hospitality, transportation and outpatient care centers. To determine the potential impact on the Company’s customers, management considered significant revenue declines in a borrower’s business as well as reductions in its operating cash flows and the impact on their ability to repay their loans, and estimated the probability of default and loss-given-default for the various loan categories at September 30, 2020 and assigned a weighting to each scenario. Based on this analysis, management estimated the potential impact resulting from COVID-19, and the adjustment to the allowance that was necessary as of September 30, 2020. During March 2020, management also established an additional qualitative loss factor solely related to the impact of COVID-19 in the calculation. As a result of management’s assessments, the Bank recorded an additional loan loss provision of $2.5 million for the quarter ended September 30, 2020. However, during this period of great uncertainty, the full impact of COVID-19 on the Company’s borrowers is likely to be felt over the next several quarters. As such, future adjustments to the allowance may be required.

    The determination of whether deferred tax assets will be realizable is predicated on the reversal of existing deferred tax liabilities, utilization against carry-back years, and estimates of future taxable income. Such estimates are subject to management’s judgment. 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. 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 September 30, 2020 and December 31, 2019, the Company's net deferred tax (liabilities)/assets totaled $(3.9) million and $10.4 million, respectively, which included a valuation allowance against deferred tax assets totaling $9.4 million and $7.4 million, respectively.

    The Company provides certain health care and life insurance benefits to eligible retired employees. The cost of retiree health care and other benefits during the employees' period of active service are accrued monthly. The accounting guidance requires the following: a) recognizing 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) measuring 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) recognizing 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.

61

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

    Qualitative Analysis. 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. The guidelines of the Company’s interest rate risk policy seek to limit the exposure to changes in interest rates that affect the underlying economic value of assets, liabilities, earnings and capital.

    The Asset/Liability Committee meets regularly to review the impact of interest rate changes on net interest income, net interest margin, net income, and the economic value of equity. The Asset/Liability Committee reviews a variety of strategies that project changes in asset or liability mix and the impact of those changes on projected net interest income and net income.

    The Company’s strategy for liabilities has been to maintain a stable funding base by focusing on core deposit accounts. The Company’s ability to retain maturing time deposit accounts is the result of its strategy to remain competitively priced within its marketplace. The Company’s pricing strategy may vary depending upon current funding needs and the ability of the Company to fund operations through alternative sources.

    Quantitative Analysis. Current and future sensitivity to changes in interest rates are measured through the use of balance sheet and income simulation models. The analysis captures changes in net interest income using flat rates as a base and rising and declining interest rate forecasts. Changes in net interest income and net income for the forecast period, generally twelve to twenty-four months, are measured and compared to policy limits for acceptable changes. The Company periodically reviews historical deposit re-pricing activity and makes modifications to certain assumptions used in its balance sheet and income simulation models regarding the interest rate sensitivity of deposits. These modifications are made to more closely reflect the most likely results under the various interest rate change scenarios. Since it is inherently difficult to predict the sensitivity of interest-bearing deposits to changes in interest rates, the changes in net interest income due to changes in interest rates cannot be precisely predicted. There are a variety of reasons that may cause actual results to vary considerably from the predictions presented below which include, but are not limited to, the timing, magnitude, and frequency of changes in interest rates, interest rate spreads, prepayments, and actions taken in response to such changes.

    Assumptions used in the simulation model may include but are not limited to:

•Securities pricing from third parties;

•Loan pricing indications from third parties;

•Loan and depository spread assumptions based upon the Company's product offerings;

•Securities and borrowing spreads based upon third party indications; and

•Prepayment assumptions derived from the Company's actual results and third party surveys.

    Certain shortcomings are 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.

    Moreover, 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 the Company’s 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.

    The table below sets forth, as of September 30, 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 the Company.

62

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

	Twelve Months Net Interest Income						Net Portfolio Value ("NPV")
(Dollars in thousands)	Amount		Dollar Change		Percent of Change		Estimated NPV		Present Value Ratio		Percent Change
Change in Interest Rates (Basis Points)
+300	$	224,532	$	12,048	5.67	%	$	972,963	11.74	%	(8.48)	%
+200	220,439		7,955		3.74		1,025,450		12.01		(3.55)
+100	216,287		3,803		1.79		1,055,418		12.02		(0.73)
Base	212,484		—		—		1,063,152		11.77		—
-100	203,248		(9,236)		(4.35)		1,013,578		10.95		(4.66)

    As of September 30, 2020, based on the scenarios above, net interest income would increase by approximately 3.74% if rates were to rise 200 basis points, and would decrease by 4.35% 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 net portfolio value through the use of immediate and sustained interest rate shocks. As of September 30, 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 3.55%. If rates were to decrease 100 basis points, the model forecasts a 4.66% decrease in the NPV.

    Overall, our September 30, 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 and Capital Resources:

    Liquidity Management. Liquidity refers to the Company's ability to generate adequate amounts of cash to meet financial obligations of a short-term and long-term nature. Sources of funds consist of deposit inflows, loan repayments and maturities, maturities and sales of securities, and the ability to execute new borrowings. While maturities and scheduled amortization of loans and securities are predictable sources of funds, deposit flows, calls of debt securities, and prepayments on loans and mortgage-backed securities are influenced by economic conditions, competition, and interest rate movements.

    The Company's cash flows are identified as cash flows from operating activities, investing activities and financing activities. Refer to the Consolidated Statements of Cash Flows for further details of the cash inflows and outflows of the Company.

    Capital Resources. 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 in 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 September 30, 2020 and December 31, 2019, each of the Company and the Bank exceeded all capital adequacy requirements to which it is subject.

    The following table presents the Company's and the Bank's actual capital amounts and ratios as of September 30, 2020 and December 31, 2019 compared to the Federal Reserve Bank minimum capital adequacy requirements and the Federal Reserve Bank requirements for classification as a well-capitalized institution:

63

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

	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 September 30, 2020:
Total capital (to risk-weighted assets)	$	1,086,078	18.66	%	$	465,585	8.00	%	$	611,080	10.50	%	N/A	N/A
Tier 1 capital (to risk-weighted assets)	1,018,285		17.50	%	349,189		6.00	%	494,684		8.50	%	N/A	N/A
Common equity tier 1 capital (to risk-weighted assets)	1,011,068		17.37	%	261,891		4.50	%	407,387		7.00	%	N/A	N/A
Tier 1 capital (to adjusted total assets)	1,018,285		11.70	%	348,206		4.00	%	348,206		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

64

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

	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
Bank	(In thousands, except ratio data)
At September 30, 2020:
Total capital (to risk-weighted assets)	$	943,563	16.24	%	$	464,747	8.00	%	$	609,980	10.50	%	$	580,933	10.00	%
Tier 1 capital (to risk-weighted assets)	870,899		14.99		348,560		6.00		493,793		8.50		464,747		8.00
Common equity tier 1 capital (to risk-weighted assets)	870,899		14.99		261,420		4.50		406,653		7.00		377,607		6.50
Tier 1 capital (to adjusted total assets)	870,899		10.00		348,492		4.00		348,492		4.00		435,615		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

65

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Item 4. 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 Securities and Exchange Act of 1934, as amended) as of September 30, 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, as of the end of the period covered by this report, the Company’s disclosure controls and procedures were effective.

    During the quarter ended September 30, 2020, there were no changes in the Company’s internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

66

PART II – OTHER INFORMATION

Item 1.     Legal Proceedings

    The Company is involved in various legal actions and claims arising in the normal course of business. In the opinion of management, these legal actions and claims are not expected to have a material adverse impact on the Company’s financial condition.

Item 1A.     Risk Factors

    For information regarding the Company’s risk factors, refer to the Risk Factors previously disclosed under Item 1A of the Company’s Annual Report on Form 10-K for the year ended December 31, 2019 filed with the Securities and Exchange Commission and the Quarterly Reports on Form 10-Q for the quarters ended March 31, 2020 and June 30, 2020. As of September 30, 2020 the risk factors of the Company have not materially changed from those disclosed in the Company's Annual Report on Form 10-K for the year ended December 31, 2019 and the Company's Quarterly Reports on Form 10-Q for the quarters ended March 31, 2020 and June 30, 2020.

Item 2.     Unregistered Sales of Equity Securities and Use of Proceeds

    The following table reports information regarding repurchases of the Company's common stock during the quarter ended September 30, 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
July 1 - 31, 2020	12,022	$	13.19	—	—
August 1 - 31, 2020	5,987	11.25		—	—
September 1 - 30, 2020	634,095	11.08		624,932	4,375,068
Total	652,104	$	11.12	624,932
(1) On September 10, 2020, the Company announced that the Company's Board of Directors authorized a new stock repurchase program for up to 5,000,000 shares of the Company's issued and outstanding common stock, commencing on September 15, 2020.
(2) During the three months ended September 30, 2020, 15,390 shares were repurchased pursuant to forfeitures and 11,782 shares were repurchased for taxes related to the 2019 Equity Incentive Plan and not as part of a share repurchase program.

Item 3.     Defaults Upon Senior Securities

    Not Applicable.

Item 4.     Mine Safety Disclosures

    Not Applicable.

Item 5.     Other Information

    None.

Item 6.     Exhibits

    The exhibits listed in the Exhibit Index (following the signatures section of this report) are included in, or incorporated by reference into this Quarterly Report on Form 10-Q.

Exhibit Index

31.1	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32	Certification of Chief Executive Officer and Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.	The following materials from the Company’s Quarterly Report to Stockholders on Form 10-Q for the quarter ended September 30, 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, (iv) the Consolidated Statements of Changes in Stockholder’s Equity, (v) the Consolidated Statements of Cash Flows and (vi) the Notes to Consolidated Financial Statements.
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 Labels Linkbase Document
101. PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document
104	Cover page Interactive Data File (embedded within the Inline XBRL document)

68

SIGNATURES

Pursuant to the requirements of Section 13 of the Securities Exchange Act of 1934, the Registrant has duly caused this quarterly report to be signed on its behalf by the undersigned, thereunto duly authorized.

		Columbia Financial, Inc.
Date:	November 9, 2020	/s/Thomas J. Kemly
		Thomas J. Kemly
		President and Chief Executive Officer
		(Principal Executive Officer)
Date:	November 9, 2020	/s/Dennis E. Gibney
		Dennis E. Gibney
		Executive Vice President and Chief Financial Officer
		(Principal Financial and Accounting Officer)

69

EX-31.1

Section 2: EX-31.1 (EXHIBIT 31.1)

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-Q 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 quarter 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:	November 9, 2020	/s/Thomas J. Kemly
		Thomas J. Kemly
		President and Chief Executive Officer

EX-31.2

Section 3: EX-31.2 (EXHIBIT 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-Q 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 quarter 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:	November 9, 2020	/s/Dennis E. Gibney
		Dennis E. Gibney
		Executive Vice President and Chief Financial Officer

EX-32

Section 4: EX-32 (Exhibit 32)

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 quarterly report of the Company on Form 10-Q for the quarter ended September 30, 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:	November 9, 2020	/s/Thomas J. Kemly
		Thomas J. Kemly
		President and Chief Executive Officer
Date:	November 9, 2020	/s/Dennis E. Gibney
		Dennis E. Gibney
		Executive Vice President and Chief Financial Officer

XML

Cover Page - shares	9 Months Ended
	Sep. 30, 2020	Nov. 06, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
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	07140
City Area Code	800
Local Phone Number	522-4167
Title of 12(b) Security	Common Stock, $0.01 par value per share
Trading Symbol	CLBK
Security Exchange Name	NASDAQ
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
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		112,655,544
Entity Central Index Key	0001723596
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period	Q3
Amendment Flag	false

XML

Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets
Cash and due from banks	$ 265,737	$ 75,420
Short-term investments	159	127
Total cash and cash equivalents	265,896	75,547
Debt securities available for sale, at fair value	1,245,300	1,098,336
Debt securities held to maturity, at amortized cost (fair value of $288,439 and $289,505 at September 30, 2020 and December 31, 2019, respectively)	272,712	285,756
Equity securities, at fair value	4,706	2,855
Federal Home Loan Bank stock	53,416	69,579
Loans held-for-sale, at fair value	4,146	0
Loans receivable	6,468,845	6,197,566
Less: allowance for loan losses	76,133	61,709
Loans receivable, net	6,392,712	6,135,857
Accrued interest receivable	31,252	22,092
Office properties and equipment, net	76,853	72,967
Bank-owned life insurance	233,127	211,415
Goodwill and intangible assets	92,506	68,582
Other assets	192,847	145,708
Total assets	8,865,473	8,188,694
Liabilities:
Deposits	6,629,648	5,645,842
Borrowings	1,015,210	1,407,022
Advance payments by borrowers for taxes and insurance	34,254	35,507
Accrued expenses and other liabilities	169,031	117,806
Total liabilities	7,848,143	7,206,177
Stockholders' equity:
Preferred stock, $0.01 par value. 10,000,000 shares authorized; none issued and outstanding at September 30, 2020 and December 31, 2019	0	0
Common stock, $0.01 par value. 500,000,000 shares authorized; 122,037,793 shares issued and 114,415,010 shares outstanding at September 30, 2020, and 117,278,745 shares issued and 113,765,387 outstanding at December 31, 2019	1,220	1,173
Additional paid-in capital	607,735	531,667
Retained earnings	652,430	615,481
Accumulated other comprehensive loss	(87,929)	(68,735)
Treasury stock, at cost; 7,622,783 shares at September 30, 2020 and 3,513,358 shares at December 31, 2019	(115,580)	(54,950)
Common stock held by the Employee Stock Ownership Plan	(39,862)	(41,564)
Stock held by Rabbi Trust	(1,814)	(1,520)
Deferred compensation obligations	1,130	965
Total stockholders' equity	1,017,330	982,517
Total liabilities and stockholders' equity	$ 8,865,473	$ 8,188,694

XML

Consolidated Statements of Financial Condition (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Debt securities held to maturity	$ 288,439	$ 289,505
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)	114,415,010	113,765,387
Treasury stock, shares (in shares)	7,622,783	3,513,358

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Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest income:
Loans receivable	$ 63,258	$ 53,594	$ 192,511	$ 157,563
Debt securities available for sale and equity securities	7,034	7,736	21,654	23,295
Debt securities held to maturity	1,749	2,068	5,807	6,090
Federal funds and interest earning deposits	71	182	287	405
Federal Home Loan Bank stock dividends	821	858	2,951	2,704
Total interest income	72,933	64,438	223,210	190,057
Interest expense:
Deposits	12,826	16,055	44,569	44,984
Borrowings	3,783	6,667	15,744	20,130
Total interest expense	16,609	22,722	60,313	65,114
Net interest income	56,324	41,716	162,897	124,943
Provision for loan losses	2,516	1,157	17,820	1,705
Net interest income after provision for loan losses	53,808	40,559	145,077	123,238
Non-interest income:
Bank-owned life insurance	1,531	1,784	4,467	4,449
Loan fees and service charges	565	3,038	1,826	5,358
Gain on securities transactions	0	1,256	370	1,721
Change in fair value of equity securities	(4)	(59)	55	189
Gain on sale of loans	1,873	382	3,422	710
Other non-interest income	1,939	1,258	5,017	3,895
Total non-interest income	7,909	10,115	21,308	22,928
Non-interest expense:
Compensation and employee benefits	26,666	21,362	76,349	61,285
Occupancy	4,823	3,973	14,319	11,628
Federal deposit insurance premiums	614	40	1,350	927
Advertising	484	533	2,075	3,311
Professional fees	1,680	1,541	4,129	4,219
Data processing	839	658	2,420	1,965
Merger-related expenses	424	740	1,931	1,202
Other non-interest expense	5,848	2,217	14,756	7,927
Total non-interest expense	41,378	31,064	117,329	92,464
Income before income tax expense	20,339	19,610	49,056	53,702
Income tax expense	5,252	5,392	12,107	12,534
Net income	$ 15,087	$ 14,218	$ 36,949	$ 41,168
Earnings per share - basic and diluted (in dollars per share)	$ 0.14	$ 0.13	$ 0.34	$ 0.37
Weighted average shares outstanding - basic and diluted (in shares)	110,983,871	111,371,754	110,177,736	111,486,179
Demand deposit account fees
Non-interest income:
Revenue from contract with customer	$ 787	$ 1,106	$ 2,706	$ 3,116
Title insurance fees
Non-interest income:
Revenue from contract with customer	$ 1,218	$ 1,350	$ 3,445	$ 3,490

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Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 15,087	$ 14,218	$ 36,949	$ 41,168
Other comprehensive income (loss), net of tax:
Unrealized (losses) gains on debt securities available for sale	(2,913)	4,915	22,705	28,302
Accretion of unrealized (loss) gain on debt securities reclassified as held to maturity	(4)	2	1	10
Reclassification adjustment for gains included in net income	0	965	289	1,325
Total other comprehensive (loss) income, net of tax	(2,917)	5,882	22,995	29,637
Derivatives, net of tax:
Unrealized gain (loss) on swap contracts accounted for as cash flow hedges	1,785	(1,279)	(10,314)	(8,735)
Total derivative, net of tax	1,785	(1,279)	(10,314)	(8,735)
Employee benefit plans, net of tax:
Amortization of prior service cost included in net income	(11)	(11)	(32)	(33)
Reclassification adjustment of actuarial net gain included in net income	(846)	(735)	(2,539)	(2,196)
Change in funded status of retirement obligations	(32,733)	1,490	(29,304)	(2,200)
Total employee benefit plans, net of tax	(33,590)	744	(31,875)	(4,429)
Total other comprehensive income (loss)	(34,722)	5,347	(19,194)	16,473
Total comprehensive income (loss), net of tax	$ (19,635)	$ 19,565	$ 17,755	$ 57,641

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Consolidated Statements of Changes in Stockholder's Equity (Unaudited) - USD ($) $ in Thousands	Total	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	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjustment Retained Earnings	Cumulative Effect, Period of Adoption, Adjustment Accumulated Other Comprehensive (Loss)	Cumulative Effect, Period of Adoption, Adjusted Balance	Cumulative Effect, Period of Adoption, Adjusted Balance Common Stock	Cumulative Effect, Period of Adoption, Adjusted Balance Additional Paid-in-Capital	Cumulative Effect, Period of Adoption, Adjusted Balance Retained Earnings	Cumulative Effect, Period of Adoption, Adjusted Balance Accumulated Other Comprehensive (Loss)	Cumulative Effect, Period of Adoption, Adjusted Balance Treasury Stock	Cumulative Effect, Period of Adoption, Adjusted Balance Common Stock Held by the Employee Stock Ownership Plan	Cumulative Effect, Period of Adoption, Adjusted Balance Stock Held by Rabbi Trust	Cumulative Effect, Period of Adoption, Adjusted Balance Deferred Compensation Obligations
Balance at beginning of period at Dec. 31, 2018	$ 972,060	$ 1,159	$ 527,037	$ 560,216	$ (71,897)	$ 0	$ (43,835)	$ (1,259)	$ 639	$ 0	$ 548	$ (548)	$ 972,060	$ 1,159	$ 527,037	$ 560,764	$ (72,445)	$ 0	$ (43,835)	$ (1,259)	$ 639
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	41,168			41,168
Other comprehensive income (loss)	16,473				16,473
Issuance of common stock allocated to restricted stock award grants	14	14
Stock based compensation	1,630		1,630
Purchase of treasury stock	(42,084)					(42,084)
Employee Stock Ownership Plan shares committed to be released	2,619		921				1,698
Funding of deferred compensation obligations	(45)							(208)	163
Balance at end of year at Sep. 30, 2019	$ 991,835	1,173	529,588	601,932	(55,972)	(42,084)	(42,137)	(1,467)	802
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares repurchased, number of shares (in shares)	2,742,300
Balance at beginning of period at Jun. 30, 2019	$ 1,007,909	1,159	527,650	587,714	(61,319)	(3,867)	(42,710)	(1,407)	689
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	14,218			14,218
Other comprehensive income (loss)	5,347				5,347
Issuance of common stock allocated to restricted stock award grants	14	14
Stock based compensation	1,630		1,630
Purchase of treasury stock	(38,217)					(38,217)
Employee Stock Ownership Plan shares committed to be released	881		308				573
Funding of deferred compensation obligations	53							(60)	113
Balance at end of year at Sep. 30, 2019	$ 991,835	1,173	529,588	601,932	(55,972)	(42,084)	(42,137)	(1,467)	802
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares repurchased, number of shares (in shares)	2,478,400
Balance at beginning of period at Dec. 31, 2019	$ 982,517	1,173	531,667	615,481	(68,735)	(54,950)	(41,564)	(1,520)	965								$ (68,735)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	36,949			36,949
Other comprehensive income (loss)	(19,194)				(19,194)
Issuance of common stock to Columbia Bank MHC	68,530	47	68,483
Stock based compensation	6,585		6,585
Purchase of treasury stock	(60,286)					(60,286)
Restricted stock forfeitures	(16)		173			(189)
Repurchase shares for taxes	0		155			(155)
Employee Stock Ownership Plan shares committed to be released	2,374		672				1,702
Funding of deferred compensation obligations	(129)							(294)	165
Balance at end of year at Sep. 30, 2020	$ 1,017,330	1,220	607,735	652,430	(87,929)	(115,580)	(39,862)	(1,814)	1,130
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Shares repurchased, number of shares (in shares)	4,081,132
Restricted stock, shares forfeited (in shares)	16,511
Repurchased shares for taxes (in shares)	11,782
Balance at beginning of period at Jun. 30, 2020	$ 1,040,988	1,220	605,124	637,343	(53,207)	(108,327)	(40,434)	(1,767)	1,036
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	15,087			15,087
Other comprehensive income (loss)	(34,722)				(34,722)
Stock based compensation	2,176		2,176
Purchase of treasury stock	(6,925)					(6,925)
Restricted stock forfeitures	0		173			(173)
Repurchase shares for taxes	0		155			(155)
Employee Stock Ownership Plan shares committed to be released	679		107				572
Funding of deferred compensation obligations	47							(47)	94
Balance at end of year at Sep. 30, 2020	$ 1,017,330	$ 1,220	$ 607,735	$ 652,430	$ (87,929)	$ (115,580)	$ (39,862)	$ (1,814)	$ 1,130
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares repurchased, number of shares (in shares)	624,932
Restricted stock, shares forfeited (in shares)	15,390
Repurchased shares for taxes (in shares)	11,782

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Consolidated Statements of Changes in Stockholder's Equity (Unaudited) (Parenthetical) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Stockholders' Equity [Abstract]
Treasury stock, shares purchased (in shares)	624,932	2,478,400	4,081,132	2,742,300
Restricted stock, shares forfeited (in shares)	15,390		16,511
Repurchased shares for taxes (in shares)	11,782		11,782

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Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income	$ 36,949,000	$ 41,168,000
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of deferred loan costs, fees and purchased premiums and discounts	818,000	1,055,000
Net amortization of premiums and discounts on securities	1,573,000	787,000
Net amortization of mortgage servicing rights	85,000	(78,000)
Amortization of intangible assets	783,000	0
Depreciation and amortization of office properties and equipment	4,947,000	3,366,000
Amortization of operating lease right-of-use assets	2,641,000	0
Provision for loan losses	17,820,000	1,705,000
Gain on securities transactions	(370,000)	(1,721,000)
Change in fair value of equity securities	(55,000)	(189,000)
Gain on securitizations	(1,523,000)	0
Gain on sale of loans	(1,899,000)	(710,000)
Loss on real estate owned	0	1,000
Loss on disposal of office properties and equipment	691,000	0
Loss on write-down of mortgage servicing rights	75,000	0
Deferred tax expense (benefit)	(3,864,000)	(7,160,000)
(Increase) in accrued interest receivable	(8,481,000)	(529,000)
(Increase) in other assets	(80,110,000)	(44,037,000)
Increase in accrued expenses and other liabilities	33,687,000	36,367,000
Income on bank-owned life insurance	(4,467,000)	(4,449,000)
Employee stock ownership plan expense	2,374,000	2,619,000
Stock based compensation	6,585,000	1,630,000
Increase in deferred compensation obligations under Rabbi Trust	(129,000)	(45,000)
Net cash provided by operating activities	8,130,000	29,780,000
Cash flows from investing activities:
Proceeds from sales of debt securities available for sale	20,761,000	31,811,000
Proceeds from sales of equity securities	0	926,000
Proceeds from paydowns/maturities/calls of debt securities available for sale	162,161,000	88,504,000
Proceeds from paydowns/maturities/calls of debt securities held to maturity	30,988,000	37,968,000
Purchases of debt securities available for sale	(201,504,000)	(143,196,000)
Purchases of debt securities held to maturity	(5,000,000)	(65,171,000)
Purchases of equity securities	0	(416,000)
Proceeds from sales of loans held-for-sale	111,764,000	94,834,000
Proceeds from sales of loans receivable	28,923,000	10,273,000
Purchases of loans receivable	0	(29,885,000)
Net increase in loans receivable	(294,040,000)	(297,434,000)
Proceeds from bank-owned life insurance death benefit	0	1,015,000
Proceeds from redemptions of Federal Home Loan Bank stock	40,717,000	47,860,000
Purchases of Federal Home Loan Bank stock	(22,544,000)	(45,999,000)
Additions to office properties and equipment	(3,750,000)	(15,039,000)
Proceeds from sale of real estate owned	0	91,000
Net cash acquired in acquisition	155,248,000	0
Net cash provided by (used in) investing activities	23,724,000	(283,858,000)
Cash flows from financing activities:
Net increase in deposits	650,572,000	369,449,000
Proceeds from long-term borrowings	90,000,000	127,337,000
Payments on long-term borrowings	(181,345,000)	(220,000,000)
Net (decrease) increase in short-term borrowings	(321,595,000)	32,600,000
Payment of subordinated debt	(16,600,000)	0
Increase in advance payments by borrowers for taxes and insurance	(2,235,000)	2,513,000
Issuance of common stock	0	14,000
Purchase of treasury stock	(60,286,000)	(42,084,000)
Purchase of employee stock ownership plan shares	0	0
Restricted stock forfeitures	(16,000)	0
Issuance of treasury stock allocated to restricted stock award grants	0	0
Net cash provided by financing activities	158,495,000	269,829,000
Net increase in cash and cash equivalents	190,349,000	15,751,000
Cash and cash equivalents at beginning of year	75,547,000	42,201,000
Cash and cash equivalents at end of period	265,896,000	57,952,000
Cash paid during the period for:
Interest on deposits and borrowings	60,772,000	64,892,000
Income tax payments, net of (refunds)	12,249,000	(4,293,000)
Non-cash investing and financing activities:
Transfer of loans receivable to loans held-for-sale	114,171,000	86,043,000
Securitization of loans	48,526,000	21,615,000
Initial recognition of operating lease right-of-use assets	22,218,000	0
Initial recognition of operating lease liabilities	23,290,000	0
Non-cash assets acquired:
Debt securities available for sale	51,479,000	0
Debt securities held to maturity	13,418,000	0
Equity securities	1,796,000	0
Federal Home Loan Bank stock	2,010,000	0
Loans receivable	171,593,000	0
Accrued interest receivable	679,000	0
Office properties and equipment, net	5,774,000	0
Bank-owned life insurance	17,245,000	0
Other assets	2,823,000	0
Total non-cash assets acquired	266,817,000	0
Liabilities assumed:
Deposits	333,234,000	0
Borrowings	37,728,000	0
Advance payments by borrowers for taxes and insurance	982,000	0
Accrued expenses and other liabilities	5,400,000	0
Total liabilities assumed	377,344,000	0
Net non-cash liabilities acquired	(110,527,000)	0
Net cash and cash equivalents acquired in acquisition	$ 155,248,000	$ 0

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Basis of Financial Statement Presentation

9 Months Ended

Sep. 30, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Financial Statement Presentation

Basis of Financial Statement Presentation

    The accompanying unaudited 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 (collectively, the “Company”). In consolidation, all intercompany accounts and transactions are eliminated.

    Columbia Financial, Inc. is a majority-owned subsidiary of Columbia Bank, MHC (the "MHC"). The accounts of the MHC are not consolidated in the accompanying consolidated financial statements of the Company.

    In preparing the interim unaudited consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the dates of the Consolidated Statements of Financial Condition and Consolidated Statements of Income for the periods presented. Actual results could differ from these estimates. Material estimates that are particularly susceptible to change are the determination of the adequacy of the allowance for credit losses, evaluation of the need for valuation allowances on deferred tax assets, and determination of liabilities related to retirement and other post-retirement benefits. These estimates and assumptions are evaluated on an ongoing basis and are adjusted when facts and circumstances dictate.

    The interim unaudited consolidated financial statements reflect all normal and recurring adjustments, which are, in the opinion of management, considered necessary for a fair presentation of the financial condition and results of operations for the periods presented. The results of operations for the three and nine month periods ended September 30, 2020 are not necessarily indicative of the results of operations that may be expected for the entire fiscal year or any other period. Certain reclassifications have been made in the consolidated financial statements to conform with current year classifications.

    The interim unaudited consolidated financial statements of the Company presented herein have been prepared in accordance with the rules of the Securities and Exchange Commission (“SEC”) for quarterly reports on Form 10-Q and U.S. generally accepted accounting principles (“GAAP”). Certain information and note disclosures have been condensed or omitted pursuant to the rules and regulations of the SEC.

    These unaudited consolidated financial statements should be read in conjunction with the Company's Annual Report on Form 10-K for the year ended December 31, 2019 and the audited consolidated financial statements included therein.

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Acquisitions

9 Months Ended

Sep. 30, 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"), 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. At the time of closing, Stewardship had $956.0 million in total assets, including $756.9 million in net loans receivable and $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 nine months ended September 30, 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 $248,000 and $1.3 million during the three and nine months ended September 30, 2020, respectively. Merger expenses recorded during the three and nine months ended September 30, 2019 totaled $740,000 and $1.2 million, respectively.

The assets acquired and liabilities assumed have been accounted for under the acquisition method of accounting. 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. There were no adjustments recorded to the amounts as of November 1, 2019.

2.    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 the 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 acquisition of the Roselle Entities totaled $175,000 and $618,000 during the three and nine months ended September 30, 2020, respectively. There were no merger expenses recorded during the three and nine months ended September 30, 2019.

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

	April 1, 2020
	(In thousands)
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 asset, 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

2.     Acquisitions (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 condition, 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. As the Company continues to analyze the acquired assets and assumed liabilities, there may be adjustments to the recorded carrying values. However, management does not expect significant future adjustments to the recorded amounts as of April 1, 2020.

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:

    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. Equipment is amortized or depreciated over their estimated useful lives usually ranging for three to ten years.

Goodwill. Goodwill is not amortized for book purposes: however, it is reviewed at least annually for impairment and is not deductible for tax purposes.

    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.

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Earnings per Share

9 Months Ended

Sep. 30, 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 three and nine months ended September 30, 2020 and 2019:     

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2020		2019		2020		2019
	(Dollars in thousands, except per share data)
Net income	$	15,087	$	14,218	$	36,949	$	41,168
Shares:
Weighted average shares outstanding - basic	110,983,871		111,371,754		110,177,736		111,486,179
Weighted average dilutive shares outstanding	—		—		—		—
Weighted average shares outstanding - diluted	110,983,871		111,371,754		110,177,736		111,486,179
Earnings per share:
Basic	$	0.14	$	0.13	$	0.34	$	0.37
Diluted	$	0.14	$	0.13	$	0.34	$	0.37

    For the three and nine months ended September 30, 2020 the average number of stock options which were anti-dilutive and were not included in the computation of diluted earnings per share totaled 2,272,060 and 1,436,476, respectively.

For the three and nine months ended September 30, 2019 the average number of stock options which were anti-dilutive and were not included in the computation of diluted earnings per share totaled 790,000 and 310,000, respectively.

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Stock Repurchase Program	9 Months Ended
	Sep. 30, 2020
Equity [Abstract]
Stock Repurchase Program	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 its 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 three and nine months ended September 30, 2020, the Company repurchased 624,932 shares at a cost of approximately $6.9 million, or $11.08 per share, and 4,081,132 shares at a cost of approximately $60.3 million, or $14.78 per share, respectively, under these programs. During the three and nine months ended September 30, 2019, the Company repurchased 2,478,400 and 2,742,300 shares, respectively, at a cost of approximately $38.2 million, or $15.42 per share, and approximately $42.1 million, or $15.35 per share, respectively. Repurchased shares are held as treasury stock and are available for general corporate purposes.

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Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2020

Accounting Standards Update and Change in Accounting Principle [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

Accounting Pronouncements Adopted in 2020

    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 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 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.

5.    Summary of Significant Accounting Policies (continued)

Accounting Pronouncements Adopted in 2020 (continued)

    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 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 platformto 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 10 for more information regarding adoption.

Accounting Pronouncements Not Yet Adopted

    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.

    The Company elected to defer the adoption of the CECL methodology permitted by the recently enacted Coronavirus Aid, Relief and Economic Security Act ("CARES Act"). The Company will adopt CECL at the earlier of December 31, 2020 or when the national emergency concerning the COVID-19 outbreak has concluded. The Company 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 September 30, 2020, we currently expect the adoption of ASU 2016-13 will result in an increase between 5% and 10% in our allowance for loan losses and our reserves for unfunded commitments.

5.    Summary of Significant Accounting Policies (continued)

Accounting Pronouncements Not Yet Adopted (continued)

    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.

    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 is currently evaluating the effect of ASU 2018-14 on its disclosures in the Company's consolidated financial statements, and as its adoption is only disclosure related, does not expect it will have a significant impact on the Company's consolidated financial statements.

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Debt Securities Available for Sale

9 Months Ended

Sep. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Debt Securities Available for Sale

Debt Securities Available for Sale

    Debt securities available for sale at September 30, 2020 and December 31, 2019 are summarized as follows:

	September 30, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
			(In thousands)
U.S. government and agency obligations	$	29,421	$	1,247	$	—	$	30,668
Mortgage-backed securities and collateralized mortgage obligations	1,095,120		39,429		(443)		1,134,106
Municipal obligations	1,870		15		—		1,885
Corporate debt securities	72,590		2,096		(505)		74,181
Trust preferred securities	5,000		—		(540)		4,460
	$	1,204,001	$	42,787	$	(1,488)	$	1,245,300

	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 September 30, 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.

	September 30, 2020
	Amortized Cost		Fair Value
	(In thousands)
One year or less	$	16,399	$	16,416
More than one year to five years	42,422		44,295
More than five years to ten years	49,590		50,000
More than ten years	470		483
	$	108,881	$	111,194
Mortgage-backed securities and collateralized mortgage obligations	1,095,120		1,134,106
	$	1,204,001	$	1,245,300

    Mortgage-backed securities and collateralized mortgage obligations totaling $1.1 billion at amortized cost, and $1.1 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.

6.    Debt Securities Available for Sale (continued)

    During the three months ended September 30, 2020, there were no sales, calls or matured debt securities available for sale.

    During the nine months ended September 30, 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 nine months ended September 30, 2020, proceeds from called debt securities available for sale totaled $6.6 million, resulting in $1,000 of gross gains and no gross losses. During the nine months ended September 30, 2020, proceeds from matured debt securities available for sale totaled $5.8 million.

    During the three months ended September 30, 2019, proceeds from the sale of debt securities available for sale totaled $16.1 million, resulting in $1.2 million of gross gains and no gross losses. During the three months ended September 30, 2019, there were no maturities or calls of debt securities available for sale.

During the nine months ended September 30, 2019, proceeds from the sale of debt securities available for sale totaled $31.8 million, resulting in $1.5 million of gross gains and no gross losses. During the nine months ended September 30, 2019, proceeds from one matured debt security available for sale totaled $797,000. During the nine months ended September 30, 2019 there were no calls of debt securities available for sale.

Debt securities available for sale having a carrying value of $800.9 million and $462.0 million, at September 30, 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 September 30, 2020 and December 31, 2019 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	September 30, 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	$	138,268	$	(367)	$	36,897	$	(76)	$	175,165	$	(443)
Corporate debt securities	993		(7)		4,503		(498)		5,496		(505)
Trust preferred securities	—		—		4,459		(540)		4,459		(540)
	$	139,261	$	(374)	$	45,859	$	(1,114)	$	185,120	$	(1,488)

6.    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 September 30, 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 September 30, 2020 totaled 41, compared with 97 at December 31, 2019. All temporarily impaired securities were investment grade at September 30, 2020 and December 31, 2019.

    The Company did not record an other-than-temporary impairment charge on debt securities available for sale during the three and nine months ended September 30, 2020 and 2019.

Debt Securities Held to Maturity

    Debt securities held to maturity at September 30, 2020 and December 31, 2019 are summarized as follows:

	September 30, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
	(In thousands)
U.S. government and agency obligations	$	5,000	$	4	$	—	$	5,004
Mortgage-backed securities and collateralized mortgage obligations	$	267,712	$	15,754	$	(31)	$	283,435
	$	272,712	$	15,758	$	(31)	$	288,439

	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

At September 30, 2020, the amortized cost and fair value of U.S. government and agency obligations maturing in more than one year to five years totaled $5.0 million, respectively.

    Mortgage-backed securities and collateralized mortgage obligations totaling $267.7 million at amortized cost, and $283.4 million at fair value at September 30, 2020, are not classified by maturity as their expected lives are likely to be shorter than the contractual maturity date due to principal prepayments.

    During the three and nine months ended September 30, 2020, there were no sales or maturities of debt securities held to maturity. During both the three and nine months ended September 30, 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.

    During the three months ended September 30, 2019, there were no sales or maturities of debt securities held for maturity. During the three months ended September 30, 2019, proceeds from calls of debt securities held to maturity totaled $23.4 million, resulting in $24,000 of gross gains and no gross losses.

During the nine months ended September 30, 2019, there were no sales or maturities of debt securities held for maturity. During the nine months ended September 30, 2019, proceeds from calls of debt securities held to maturity totaled $28.4 million, resulting in $24,000 of gross gains and no gross losses.

    Debt securities held to maturity having a carrying value of $235.3 million and $236.0 million, at September 30, 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.

7.    Debt Securities Held to Maturity (continued)

The following tables summarize the fair value and gross unrealized losses of those securities that reported an unrealized loss at September 30, 2020 and December 31, 2019 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	September 30, 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	$	2,695	$	(6)	$	1,883	$	(25)	$	4,578	$	(31)

	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 September 30, 2020, nor is it more likely than not that the Company will be required to sell the securities before the anticipated recovery.

    There were three securities in an unrealized loss position at September 30, 2020, compared with 22 at December 31, 2019. All temporarily impaired securities were investment grade at September 30, 2020 and December 31, 2019.

    The Company did not record an other-than-temporary impairment charge on debt securities held to maturity during the three and nine months ended September 30, 2020 and 2019.

Equity Securities at Fair Value

    The Company has an equity securities portfolio which consists of common 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 September 30, 2020 and December 31, 2019 was $4.7 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 (decrease) increase in the fair value of equity securities of $(4,000) and $55,000, during the three and nine months ended September 30, 2020, as a component of non-interest income. During the three and nine months ended September 30, 2019, the Company recorded a net (decrease) increase in the fair value of equity securities of $(59,000) and $189,000, respectively, as a component of non-interest income.

    During the three and nine months ended September 30, 2020, there were no sales of equity securities. During the three months ended September 30, 2019, proceeds from the sale of one equity security totaled $161,000, resulting in a gross gain of $70,000. During the nine months ended September 30, 2019, proceeds from sales of equity securities totaled $926,000, resulting in gross gains of $196,000 and no gross losses.

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Debt Securities Held to Maturity

9 Months Ended

Sep. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Debt Securities Held to Maturity

Debt Securities Available for Sale

    Debt securities available for sale at September 30, 2020 and December 31, 2019 are summarized as follows:

	September 30, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
			(In thousands)
U.S. government and agency obligations	$	29,421	$	1,247	$	—	$	30,668
Mortgage-backed securities and collateralized mortgage obligations	1,095,120		39,429		(443)		1,134,106
Municipal obligations	1,870		15		—		1,885
Corporate debt securities	72,590		2,096		(505)		74,181
Trust preferred securities	5,000		—		(540)		4,460
	$	1,204,001	$	42,787	$	(1,488)	$	1,245,300

	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 September 30, 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.

	September 30, 2020
	Amortized Cost		Fair Value
	(In thousands)
One year or less	$	16,399	$	16,416
More than one year to five years	42,422		44,295
More than five years to ten years	49,590		50,000
More than ten years	470		483
	$	108,881	$	111,194
Mortgage-backed securities and collateralized mortgage obligations	1,095,120		1,134,106
	$	1,204,001	$	1,245,300

    Mortgage-backed securities and collateralized mortgage obligations totaling $1.1 billion at amortized cost, and $1.1 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.

6.    Debt Securities Available for Sale (continued)

    During the three months ended September 30, 2020, there were no sales, calls or matured debt securities available for sale.

    During the nine months ended September 30, 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 nine months ended September 30, 2020, proceeds from called debt securities available for sale totaled $6.6 million, resulting in $1,000 of gross gains and no gross losses. During the nine months ended September 30, 2020, proceeds from matured debt securities available for sale totaled $5.8 million.

    During the three months ended September 30, 2019, proceeds from the sale of debt securities available for sale totaled $16.1 million, resulting in $1.2 million of gross gains and no gross losses. During the three months ended September 30, 2019, there were no maturities or calls of debt securities available for sale.

During the nine months ended September 30, 2019, proceeds from the sale of debt securities available for sale totaled $31.8 million, resulting in $1.5 million of gross gains and no gross losses. During the nine months ended September 30, 2019, proceeds from one matured debt security available for sale totaled $797,000. During the nine months ended September 30, 2019 there were no calls of debt securities available for sale.

Debt securities available for sale having a carrying value of $800.9 million and $462.0 million, at September 30, 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 September 30, 2020 and December 31, 2019 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	September 30, 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	$	138,268	$	(367)	$	36,897	$	(76)	$	175,165	$	(443)
Corporate debt securities	993		(7)		4,503		(498)		5,496		(505)
Trust preferred securities	—		—		4,459		(540)		4,459		(540)
	$	139,261	$	(374)	$	45,859	$	(1,114)	$	185,120	$	(1,488)

6.    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 September 30, 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 September 30, 2020 totaled 41, compared with 97 at December 31, 2019. All temporarily impaired securities were investment grade at September 30, 2020 and December 31, 2019.

    The Company did not record an other-than-temporary impairment charge on debt securities available for sale during the three and nine months ended September 30, 2020 and 2019.

Debt Securities Held to Maturity

    Debt securities held to maturity at September 30, 2020 and December 31, 2019 are summarized as follows:

	September 30, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
	(In thousands)
U.S. government and agency obligations	$	5,000	$	4	$	—	$	5,004
Mortgage-backed securities and collateralized mortgage obligations	$	267,712	$	15,754	$	(31)	$	283,435
	$	272,712	$	15,758	$	(31)	$	288,439

	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

At September 30, 2020, the amortized cost and fair value of U.S. government and agency obligations maturing in more than one year to five years totaled $5.0 million, respectively.

    Mortgage-backed securities and collateralized mortgage obligations totaling $267.7 million at amortized cost, and $283.4 million at fair value at September 30, 2020, are not classified by maturity as their expected lives are likely to be shorter than the contractual maturity date due to principal prepayments.

    During the three and nine months ended September 30, 2020, there were no sales or maturities of debt securities held to maturity. During both the three and nine months ended September 30, 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.

    During the three months ended September 30, 2019, there were no sales or maturities of debt securities held for maturity. During the three months ended September 30, 2019, proceeds from calls of debt securities held to maturity totaled $23.4 million, resulting in $24,000 of gross gains and no gross losses.

During the nine months ended September 30, 2019, there were no sales or maturities of debt securities held for maturity. During the nine months ended September 30, 2019, proceeds from calls of debt securities held to maturity totaled $28.4 million, resulting in $24,000 of gross gains and no gross losses.

    Debt securities held to maturity having a carrying value of $235.3 million and $236.0 million, at September 30, 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.

7.    Debt Securities Held to Maturity (continued)

The following tables summarize the fair value and gross unrealized losses of those securities that reported an unrealized loss at September 30, 2020 and December 31, 2019 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	September 30, 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	$	2,695	$	(6)	$	1,883	$	(25)	$	4,578	$	(31)

	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 September 30, 2020, nor is it more likely than not that the Company will be required to sell the securities before the anticipated recovery.

    There were three securities in an unrealized loss position at September 30, 2020, compared with 22 at December 31, 2019. All temporarily impaired securities were investment grade at September 30, 2020 and December 31, 2019.

    The Company did not record an other-than-temporary impairment charge on debt securities held to maturity during the three and nine months ended September 30, 2020 and 2019.

Equity Securities at Fair Value

    The Company has an equity securities portfolio which consists of common 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 September 30, 2020 and December 31, 2019 was $4.7 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 (decrease) increase in the fair value of equity securities of $(4,000) and $55,000, during the three and nine months ended September 30, 2020, as a component of non-interest income. During the three and nine months ended September 30, 2019, the Company recorded a net (decrease) increase in the fair value of equity securities of $(59,000) and $189,000, respectively, as a component of non-interest income.

    During the three and nine months ended September 30, 2020, there were no sales of equity securities. During the three months ended September 30, 2019, proceeds from the sale of one equity security totaled $161,000, resulting in a gross gain of $70,000. During the nine months ended September 30, 2019, proceeds from sales of equity securities totaled $926,000, resulting in gross gains of $196,000 and no gross losses.

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Equity Securities at Fair Value

9 Months Ended

Sep. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Equity Securities at Fair Value

Debt Securities Available for Sale

    Debt securities available for sale at September 30, 2020 and December 31, 2019 are summarized as follows:

	September 30, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
			(In thousands)
U.S. government and agency obligations	$	29,421	$	1,247	$	—	$	30,668
Mortgage-backed securities and collateralized mortgage obligations	1,095,120		39,429		(443)		1,134,106
Municipal obligations	1,870		15		—		1,885
Corporate debt securities	72,590		2,096		(505)		74,181
Trust preferred securities	5,000		—		(540)		4,460
	$	1,204,001	$	42,787	$	(1,488)	$	1,245,300

	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 September 30, 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.

	September 30, 2020
	Amortized Cost		Fair Value
	(In thousands)
One year or less	$	16,399	$	16,416
More than one year to five years	42,422		44,295
More than five years to ten years	49,590		50,000
More than ten years	470		483
	$	108,881	$	111,194
Mortgage-backed securities and collateralized mortgage obligations	1,095,120		1,134,106
	$	1,204,001	$	1,245,300

    Mortgage-backed securities and collateralized mortgage obligations totaling $1.1 billion at amortized cost, and $1.1 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.

6.    Debt Securities Available for Sale (continued)

    During the three months ended September 30, 2020, there were no sales, calls or matured debt securities available for sale.

    During the nine months ended September 30, 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 nine months ended September 30, 2020, proceeds from called debt securities available for sale totaled $6.6 million, resulting in $1,000 of gross gains and no gross losses. During the nine months ended September 30, 2020, proceeds from matured debt securities available for sale totaled $5.8 million.

    During the three months ended September 30, 2019, proceeds from the sale of debt securities available for sale totaled $16.1 million, resulting in $1.2 million of gross gains and no gross losses. During the three months ended September 30, 2019, there were no maturities or calls of debt securities available for sale.

During the nine months ended September 30, 2019, proceeds from the sale of debt securities available for sale totaled $31.8 million, resulting in $1.5 million of gross gains and no gross losses. During the nine months ended September 30, 2019, proceeds from one matured debt security available for sale totaled $797,000. During the nine months ended September 30, 2019 there were no calls of debt securities available for sale.

Debt securities available for sale having a carrying value of $800.9 million and $462.0 million, at September 30, 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 September 30, 2020 and December 31, 2019 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	September 30, 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	$	138,268	$	(367)	$	36,897	$	(76)	$	175,165	$	(443)
Corporate debt securities	993		(7)		4,503		(498)		5,496		(505)
Trust preferred securities	—		—		4,459		(540)		4,459		(540)
	$	139,261	$	(374)	$	45,859	$	(1,114)	$	185,120	$	(1,488)

6.    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 September 30, 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 September 30, 2020 totaled 41, compared with 97 at December 31, 2019. All temporarily impaired securities were investment grade at September 30, 2020 and December 31, 2019.

    The Company did not record an other-than-temporary impairment charge on debt securities available for sale during the three and nine months ended September 30, 2020 and 2019.

Debt Securities Held to Maturity

    Debt securities held to maturity at September 30, 2020 and December 31, 2019 are summarized as follows:

	September 30, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
	(In thousands)
U.S. government and agency obligations	$	5,000	$	4	$	—	$	5,004
Mortgage-backed securities and collateralized mortgage obligations	$	267,712	$	15,754	$	(31)	$	283,435
	$	272,712	$	15,758	$	(31)	$	288,439

	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

At September 30, 2020, the amortized cost and fair value of U.S. government and agency obligations maturing in more than one year to five years totaled $5.0 million, respectively.

    Mortgage-backed securities and collateralized mortgage obligations totaling $267.7 million at amortized cost, and $283.4 million at fair value at September 30, 2020, are not classified by maturity as their expected lives are likely to be shorter than the contractual maturity date due to principal prepayments.

    During the three and nine months ended September 30, 2020, there were no sales or maturities of debt securities held to maturity. During both the three and nine months ended September 30, 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.

    During the three months ended September 30, 2019, there were no sales or maturities of debt securities held for maturity. During the three months ended September 30, 2019, proceeds from calls of debt securities held to maturity totaled $23.4 million, resulting in $24,000 of gross gains and no gross losses.

During the nine months ended September 30, 2019, there were no sales or maturities of debt securities held for maturity. During the nine months ended September 30, 2019, proceeds from calls of debt securities held to maturity totaled $28.4 million, resulting in $24,000 of gross gains and no gross losses.

    Debt securities held to maturity having a carrying value of $235.3 million and $236.0 million, at September 30, 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.

7.    Debt Securities Held to Maturity (continued)

The following tables summarize the fair value and gross unrealized losses of those securities that reported an unrealized loss at September 30, 2020 and December 31, 2019 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	September 30, 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	$	2,695	$	(6)	$	1,883	$	(25)	$	4,578	$	(31)

	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 September 30, 2020, nor is it more likely than not that the Company will be required to sell the securities before the anticipated recovery.

    There were three securities in an unrealized loss position at September 30, 2020, compared with 22 at December 31, 2019. All temporarily impaired securities were investment grade at September 30, 2020 and December 31, 2019.

    The Company did not record an other-than-temporary impairment charge on debt securities held to maturity during the three and nine months ended September 30, 2020 and 2019.

Equity Securities at Fair Value

    The Company has an equity securities portfolio which consists of common 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 September 30, 2020 and December 31, 2019 was $4.7 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 (decrease) increase in the fair value of equity securities of $(4,000) and $55,000, during the three and nine months ended September 30, 2020, as a component of non-interest income. During the three and nine months ended September 30, 2019, the Company recorded a net (decrease) increase in the fair value of equity securities of $(59,000) and $189,000, respectively, as a component of non-interest income.

    During the three and nine months ended September 30, 2020, there were no sales of equity securities. During the three months ended September 30, 2019, proceeds from the sale of one equity security totaled $161,000, resulting in a gross gain of $70,000. During the nine months ended September 30, 2019, proceeds from sales of equity securities totaled $926,000, resulting in gross gains of $196,000 and no gross losses.

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Loans Receivable and Allowance for Loan Losses

9 Months Ended

Sep. 30, 2020

Receivables [Abstract]

Loans Receivable and Allowance for Loan Losses

Loans Receivable and Allowance for Loan Losses

    Loans receivable at September 30, 2020 and December 31, 2019 are summarized as follows:

	September 30,		December 31,
	2020		2019
	(In thousands)
Real estate loans:
One-to-four family	$	2,053,293	$	2,077,079
Multifamily and commercial	2,863,718		2,919,985
Construction	307,659		298,942
Commercial business loans	884,931		483,215
Consumer loans:
Home equity loans and advances	340,962		388,127
Other consumer loans	1,538		1,960
Total gross loans	6,452,101		6,169,308
Purchased credit-impaired loans	6,706		7,021
Net deferred loan costs, fees and purchased premiums and discounts	10,038		21,237
Loans receivable	$	6,468,845	$	6,197,566

    The Company had $4.1 million of small business administration loans held-for-sale at September 30, 2020. The Company had no loans held-for-sale at December 31, 2019. During the three months ended September 30, 2020, the Company sold $7.8 million of one-to-four family real estate loans held-for-sale, resulting in gross gains of $327,000 and no gross losses. During the nine months ended September 30, 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 three months ended September 30, 2019, the Company sold $49.1 million of one-to-four family real estate loans held-for-sale resulting in gross gains of $382,000 and no gross losses. During the nine months ended September 30, 2019, the Company sold $94.8 million of one-to-four family real estate loans held-for-sale resulting in gross gains of $710,000 and no gross losses.

    During the three months ended September 30, 2020, the Company sold one construction loan totaling $5.8 million included in loans receivable, resulting in no gross gains or losses. During the three months ended September 30, 2020, the Company sold one small business administration loan totaling $274,000 included in loans receivable, resulting in a gross gain of $23,000. During the nine months ended September 30, 2020, the Company sold $8.8 million of one-to-four family real estate loans, resulting in gross gains of $82,000 and no gross losses. During the nine months ended September 30, 2020, the Company sold construction loans totaling $12.5 million included in loans receivable, resulting in no gross gains or gross losses. During the nine months ended September 30, 2020, the Company sold commercial loans and small business administration loans totaling $7.6 million, resulting in gross gains of $78,000 and no gross losses. During the three and nine months ended September 30, 2019, the Company sold $2.3 million and $4.8 million, respectively of one-to-four family real estate and home equity loans included in loans receivable, resulting in no gross gains or gross losses. During the three and nine months ended September 30, 2019, the Company sold $5.5 million of commercial real estate loans included in loans receivable, resulting in no gross gains or gross losses.

     During the three and nine months ended September 30, 2020, there were no loans purchased by the Company. During the three months ended September 30, 2019, there were no loans purchased by the Company. During the nine months ended September 30, 2019, the Company purchased $5.0 million of one-to-four family real estate loan from third parties and purchased $24.9 million of commercial real estate loans from third parties.

    At September 30, 2020 commercial business loans included $474.9 million SBA Payroll Protection Program ("PPP") loans and net deferred loan fees totaling $11.2 million. At December 31, 2019 there were no SBA PPP loans.

9.    Loans Receivable and Allowance for Loan Losses (continued)

The Company has entered into guarantor swaps with Freddie Mac which results in improved liquidity. During the three and nine months ended September 30, 2020, the Company exchanged $48.5 million of loans for Freddie Mac mortgage participation certificates, resulting in gross gains of $1.5 million and no gross losses. During the three months ended September 30, 2019, no loans were securitized. During the nine months ended September 30, 2019 the Company exchanged $21.6 million of loans for a Freddie Mac mortgage participation certificate. The Company retained the servicing of these loans.

At September 30, 2020 and December 31, 2019, the carrying value of loans serviced by the Company for investors was $602.5 million and $526.3 million, respectively.

    The following tables summarize the aging of loans receivable by portfolio segment, including non-accrual loans and excluding PCI loans at September 30, 2020 and December 31, 2019:

	September 30, 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	$	4,347	$	542	$	1,760	$	6,649	$	2,881	$	2,043,763	$	2,053,293
Multifamily and commercial	600		1,772		2,798		5,170		2,995		2,855,553		2,863,718
Construction	80		—		—		80		—		307,579		307,659
Commercial business loans	2,910		2,643		2,698		8,251		4,536		872,144		884,931
Consumer loans:
Home equity loans and advances	1,610		186		323		2,119		499		338,344		340,962
Other consumer loans	1		1		—		2		—		1,536		1,538
Total loans	$	9,548	$	5,144	$	7,579	$	22,271	$	10,911	$	6,418,919	$	6,452,101

	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 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 September 30, 2020 and December 31, 2019, non-accrual loans totaled $10.9 million and $6.7 million, respectively. Included in non-accrual loans at September 30, 2020, are 22 loans totaling $3.9 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.

9.    Loans Receivable and Allowance for Loan Losses (continued)

    At September 30, 2020 and December 31, 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 accounted for at fair value at acquisition, based upon the present value of expected future cash flows, with no related allowance for loan losses. PCI loans acquired in the Stewardship acquisition totaled $5.9 million at September 30, 2020 and $6.9 million at December 31, 2019. PCI loans acquired in the Roselle acquisition totaled $179,000 at September 30, 2020.

    The following table presents changes in accretable yield for PCI loans for the three and nine months ended September 30, 2020. There were no PCI loans outstanding for the three and nine months ended September 30, 2019.

	Three Months Ended September 30, 2020		Nine Months Ended September 30, 2020
	(In thousands)
Balance at beginning of period	$	471	$	511
Acquisition	—		58
Accretion	(58)		(156)
Net change in expected cash flows	1		1
Balance at end of period	$	414	$	414

    We may obtain physical possession of real estate collateralizing a residential mortgage loan via foreclosure or through an in-substance repossession. At September 30, 2020 and December 31, 2019, the Company had no real estate owned. At September 30, 2020 and December 31, 2019 we had one and four residential mortgage loans with carrying values totaling $180,000 and $522,000, respectively, collateralized by residential real estate which are in the process of foreclosure.

9.    Loans Receivable and Allowance for Loan Losses (continued)

    The following tables summarize loans receivable (including PCI loans) and allowance for loan losses by portfolio segment and impairment method at September 30, 2020 and December 31, 2019:

	September 30, 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	$	406	$	550	$	—	$	871	$	12	$	—	$	1,839
Collectively evaluated for impairment	15,369		30,439		10,534		16,631		1,314		7		74,294
Loans acquired with deteriorated credit quality	—		—		—		—		—		—		—
Total	$	15,775	$	30,989	$	10,534	$	17,502	$	1,326	$	7	$	76,133
Total loans:
Individually evaluated for impairment	$	7,230	$	32,090	$	—	$	4,664	$	1,862	$	—	$	45,846
Collectively evaluated for impairment	2,046,063		2,831,628		307,659		880,267		339,100		1,538		6,406,255
Loans acquired with deteriorated credit quality	291		4,923		—		1,492		—		—		6,706
Total loans	$	2,053,584	$	2,868,641	$	307,659	$	886,423	$	340,962	$	1,538	$	6,458,807

9.    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.

9.    Loans Receivable and Allowance for Loan Losses (continued)

    The following table presents the number of loans modified as TDRs during the three and nine months ended September 30, 2020 and 2019, 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.

	For the Three Months Ended September 30,
	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	4	$	16,387	$	16,387	—	$	—	$	—
Commercial business loans	1	1,295		1,295		—	—		—
Total restructured loans	5	$	17,682	$	17,682	—	$	—	$	—

	For the Nine Months Ended September 30,
	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	4	$	16,387	$	16,387	—	$	—	$	—
Commercial business loans	2	11,507		12,802		1	4,095		4,095
Total restructured loans	6	$	27,894	$	29,189	1	$	4,095	$	4,095

9.    Loans Receivable and Allowance for Loan Losses (continued)

The activity in the allowance for loan losses by portfolio segment for the three and nine months ended September 30, 2020 and 2019 are as follows:

	For the Three Months Ended September 30,
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
2020
Balance at beginning of period	$	16,633	$	27,330	$	10,217	$	18,314	$	1,514	$	7	$	74,015
Provision charged (credited)	(758)		3,659		317		(573)		(129)		—		2,516
Recoveries	87		—		—		128		32		—		247
Charge-offs	(187)		—		—		(367)		(91)		—		(645)
Balance at end of period	$	15,775	$	30,989	$	10,534	$	17,502	$	1,326	$	7	$	76,133
2019
Balance at beginning of period	$	15,610	$	22,679	$	8,806	$	12,718	$	2,583	$	7	$	62,403
Provision charged (credited)	347		290		(1,047)		2,040		(474)		1		1,157
Recoveries	4		—		1		8		22		—		35
Charge-offs	(228)		—		—		(738)		—		—		(966)
Balance at end of period	$	15,733	$	22,969	$	7,760	$	14,028	$	2,131	$	8	$	62,629

9.    Loans Receivable and Allowance for Loan Losses (continued)

	For the Nine Months Ended September 30,
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
2020
Balance at beginning of period	$	13,780	$	22,980	$	7,435	$	15,836	$	1,669	$	9	$	61,709
Provision charged (credited)	2,292		7,998		3,098		4,685		(253)		—		17,820
Recoveries	329		12		1		211		55		—		608
Charge-offs	(626)		(1)		—		(3,230)		(145)		(2)		(4,004)
Balance at end of period	$	15,775	$	30,989	$	10,534	$	17,502	$	1,326	$	7	$	76,133
2019
Balance at beginning of period	$	15,232	$	23,251	$	7,217	$	14,176	$	2,458	$	8	$	62,342
Provision charged (credited)	1,215		(282)		541		485		(255)		1		1,705
Recoveries	29		—		2		374		29		—		434
Charge-offs	(743)		—		—		(1,007)		(101)		(1)		(1,852)
Balance at end of period	$	15,733	$	22,969	$	7,760	$	14,028	$	2,131	$	8	$	62,629

9.    Loans Receivable and Allowance for Loan Losses (continued)

    The following tables present loans individually evaluated for impairment by loan segment, excluding PCI loans, at September 30, 2020 and December 31, 2019:

	At September 30, 2020
	Recorded Investment		Unpaid Principal Balance		Specific Allowance
	(In thousands)
With no allowance recorded:
Real estate loans:
One-to-four family	$	2,825	$	3,616	$	—
Multifamily and commercial	20,389		20,426		—
Commercial business loans	2,577		2,680		—
Consumer loans:
Home equity loans and advances	708		845		—
	26,499		27,567		—
With a specific allowance recorded:
Real estate loans:
One-to-four family	4,405		4,420		406
Multifamily and commercial	11,701		12,316		550
Commercial business loans	2,087		5,429		871
Consumer loans:
Home equity loans and advances	1,154		1,154		12
	19,347		23,319		1,839
Total:
Real estate loans:
One-to-four family	7,230		8,036		406
Multifamily and commercial	32,090		32,742		550
Commercial business loans	4,664		8,109		871
Consumer loans:
Home equity loans and advances	1,862		1,999		12
Total loans	$	45,846	$	50,886	$	1,839

9.    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
	$	18,811	$	24,017	$	1,621

    Specific allocations of the allowance for loan losses attributable to impaired loans totaled $1.8 million and $1.6 million at September 30, 2020 and December 31, 2019, respectively. At September 30, 2020 and December 31, 2019, impaired loans for which there was no related allowance for loan losses totaled $26.5 million and $10.7 million, respectively.

    The recorded investment in TDRs totaled $44.1 million at September 30, 2020, of which one loan totaling $420,000 was 30-59 days past due, one loan totaling $262,000 was 60-89 days past due, and three loans totaling $910,000 were over 90 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 September 30, 2020. The recorded investment in TDRs totaled $20.0 million at December 31, 2019, of which there were no loans 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.

9.    Loans Receivable and Allowance for Loan Losses (continued)

    The following tables present interest income recognized for loans individually evaluated for impairment, by loan segment, excluding PCI loans for the three and nine months ended September 30, 2020 and 2019:

	For the Three Months Ended September 30,
	2020				2019
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(In thousands)
Real estate loans:
One-to-four family	$	8,020	$	74	$	8,773	$	101
Multifamily and commercial	23,525		227		2,637		37
Construction	—		—		850		—
Commercial business loans	4,979		52		7,461		88
Consumer loans:
Home equity loans and advances	1,935		28		2,629		35
Total loans	$	38,459	$	381	$	22,350	$	261

	For the Nine Months Ended September 30,
	2020				2019
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(In thousands)
Real estate loans:
One-to-four family	$	8,175	$	226	$	9,144	$	340
Multifamily and commercial	20,670		653		2,667		111
Construction	—		—		850		—
Commercial business loans	5,468		196		5,848		268
Consumer loans:
Home equity loans and advances	1,995		85		2,866		122
Total loans	$	36,308	$	1,160	$	21,375	$	841

    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.

9.    Loans Receivable and Allowance for Loan Losses (continued)

    The following tables present loans receivable by credit quality risk indicator and by loan segment, excluding PCI loans at September 30, 2020 and December 31, 2019:

	September 30, 2020
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Pass	$	2,046,613	$	2,828,021	$	307,659	$	869,122	$	340,047	$	1,538	$	6,393,000
Special mention	408		15,819		—		8,061		—		—		24,288
Substandard	6,272		19,878		—		7,748		915		—		34,813
Doubtful	—		—		—		—		—		—		—
Loss	—		—		—		—		—		—		—
Total	$	2,053,293	$	2,863,718	$	307,659	$	884,931	$	340,962	$	1,538	$	6,452,101

	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	—		—		—		—		—		—		—
Loss	—		—		—		—		—		—		—
Total	$	2,077,079	$	2,919,985	$	298,942	$	483,215	$	388,127	$	1,960	$	6,169,308

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Leases

9 Months Ended

Sep. 30, 2020

Leases [Abstract]

Leases

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 5, Summary of Significant Accounting Policies, Accounting Pronouncements Adopted. The Company's leases primarily relate to real estate property for branches and office space. At September 30, 2020, all of the Company's leases are classified as operating leases.

    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 5 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 September 30, 2020, the weighted average remaining lease term for operating leases was 7.6 years and the weighted average discount rate used in the measurement of operating lease liabilities was 2.25%.

10.    Leases (continued)

    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 three and nine months ended September 30, 2020, operating and variable lease expenses totaled approximately $603,000 and $1.9 million, respectively.

    There were no sale and leaseback transactions, leveraged leases or lease transactions with related parties during the three and nine months ended September 30, 2020. At September 30, 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 September 30, 2020	Lease Payment Obligations
	(In thousands)
2020	$	1,037
2021	4,010
2022	3,624
2023	3,310
2024	2,586
Thereafter	8,534
Total undiscounted cash flows	23,101
Discount on cash flows	(2,093)
Total lease liability	$21,008

    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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Deposits

9 Months Ended

Sep. 30, 2020

Deposits [Abstract]

Deposits

Deposits

    Deposits at September 30, 2020 and December 31, 2019 are summarized as follows:

	September 30,		December 31,
	2020		2019
	(In thousands)
Non-interest-bearing demand	$	1,341,248	$	958,442
Interest-bearing demand	2,033,729		1,720,383
Money market accounts	540,723		410,392
Savings and club deposits	652,970		543,480
Certificates of deposit	2,060,978		2,013,145
Total deposits	$	6,629,648	$	5,645,842

Included in the above balances at September 30, 2020 and December 31, 2019 are certificates of deposit obtained through brokers, totaling $26.4 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 $1.1 billion at both September 30, 2020 and December 31, 2019. Interest expense on deposits for the three and nine months ended September 30, 2020 and 2019 totaled $12.8 million and $16.1 million, and $44.6 million and $45.0 million, respectively.

11.    Deposits (continued)

    Scheduled maturities of certificates of deposit accounts at September 30, 2020 and December 31, 2019 are summarized as follows:

	September 30,		December 31,
	2020		2019
	(In thousands)
One year or less	$	1,543,088	$	1,293,613
After one year to two years	390,328		548,995
After two years to three years	55,389		142,458
After three years to four years	24,618		11,362
After four years	47,555		16,717
	$	2,060,978	$	2,013,145

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Stock Based Compensation

9 Months Ended

Sep. 30, 2020

Share-based Payment Arrangement [Abstract]

Stock Based Compensation

Stock Based Compensation

    At the Company's annual meeting of stockholders 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, 1,419,131 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 but 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.

    Restricted shares granted under the 2019 Plan generally vest in equal installments, over performance or service periods ranging from three to five years, beginning one 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 three and nine months ended September 30, 2020, approximately $1.4 million and $4.2 million, respectively, in expense was recognized in regard to these awards. During the three and nine months ended September 30, 2019, approximately $1.0 million in expense was recognized in regard to these awards. The expected future compensation expense related to the 1,236,074 non-vested restricted shares outstanding at September 30, 2020 is approximately $15.5 million over a weighted average period of 3.3 years.

    The following is a summary of the Company's restricted stock activity during the three and nine months ended September 30, 2020 and 2019:

	Number of Restricted Shares	Weighted Average Grant Date Fair Value
Non-vested at January 1, 2020	1,420,012	$	15.67
Grants	—	—
Forfeited	(881)	16.60
Non-vested at March 31, 2020	1,419,131	$	15.67
Forfeited	(240)	15.60
Non-vested at June 30, 2020	1,418,891	$	15.67
Vested	(167,427)	15.62
Forfeited	(15,390)	16.07
Non-vested at September 30, 2020	1,236,074	$	15.68

12.    Stock Based Compensation (Continued)

	Number of Restricted Shares	Weighted Average Grant Date Fair Value
Non-vested at January 1, 2019	—	$	—
Grants	1,389,570	15.60
Non-vested at September 30, 2019	1,389,570	$	15.60

On July 23, 2019, options to purchase 3,589,959 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 became 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 three and nine months ended September 30, 2020, approximately $808,000 and $2.4 million in expense was recognized in regard to these awards. During both the three and nine months ended September 30, 2019, approximately $601,000 in expense was recognized in regard to these awards. The expected future compensation expense related to the 2,999,767 non-vested options outstanding at September 30, 2020 is $12.1 million over a weighted average period of 8.8 years.

    The following is a summary of the Company's option activity during the three and nine months ended September 30, 2020 and 2019:

	Number of Stock Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding, January 1, 2020	3,784,044	$	15.67	9.6	$	4,812,490
Forfeited	(9,707)	15.60		—	—
Outstanding, March 31, 2020	3,774,337	$	15.67	9.3	$	—
Forfeited	(2,647)	15.60		—	—
Outstanding, June 30, 2020	3,771,690	$	15.67	9.1	$	—
Forfeited	(44,485)	15.95		—	—
Outstanding, September 30, 2020	3,727,205	$	15.67	8.8	$	—
Options exercisable at September 30, 2020	727,438	$	15.62	8.7	$	—

12.    Stock Based Compensation (Continued)

	Number of Stock Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding, January 1, 2019	—	$	—	—	$	—
Granted	3,707,901	15.60		9.8	704,501
Outstanding, September 30, 2019	3,707,901	$	15.60	9.8	$	704,501
Options exercisable at September 30, 2019	—	$	—	—	$	—

    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 three and nine months ended September 30, 2020 and 2019.

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Components of Net Periodic Benefit Costs

9 Months Ended

Sep. 30, 2020

Retirement Benefits [Abstract]

Components of Periodic Benefit Costs

Components of Net Periodic Benefit Cost

    Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") and Post-retirement Plan

    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 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 been closed to new hires. The Company also provides life insurance benefits to eligible employees under an endorsement split-dollar life insurance program.

    Net periodic benefit (income) cost for Pension Plan, RIM Plan, Post-retirement Plan and split-dollar life insurance arrangement plan benefits for the three and nine months ended September 30, 2020 and 2019, includes the following components:

13.    Components of Net Periodic Benefit Cost (continued)

	For the Three Months Ended September 30,
	Pension Plan				RIM Plan				Post-retirement Plan				Split-Dollar Life Insurance
	2020		2019		2020		2019		2020		2019		2020		2019		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	2,032	$	1,746	$	67	$	53	$	99	$	84	$	120	$	88	Compensation and employee benefits
Interest cost	1,824		2,090		102		116		171		207		135		114		Other non-interest expense
Expected return on plan assets	(5,908)		(5,802)		—		—		—		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		—		—		—		14		14		Other non-interest expense
Net loss	1,492		770		99		61		77		37		113		62		Other non-interest expense
Net periodic (income) benefit cost	$	(560)	$	(1,196)	$	268	$	230	$	347	$	328	$	382	$	278

	For the Nine Months Ended September 30,
	Pension Plan				RIM Plan				Post-retirement Plan				Split-Dollar Life Insurance
	2020		2019		2020		2019		2020		2019		2020		2019		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	5,906	$	4,748	$	201	$	159	$	297	$	252	$	346	$	264	Compensation and employee benefits
Interest cost	5,887		6,478		306		348		513		621		384		342		Other non-interest expense
Expected return on plan assets	(17,383)		(15,256)		—		—		—		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		—		—		—		42		42		Other non-interest expense
Net loss	3,054		2,300		297		183		231		111		339		186		Other non-interest expense
Net periodic (income) benefit cost	$	(2,536)	$	(1,730)	$	804	$	690	$	1,041	$	984	$	1,111	$	834

    For the three and nine months ended September 30, 2020, a $12.0 million contribution was made to the Pension Plan. The net periodic cost (income) for pension benefits, other post-retirement and split dollar life insurance benefits for the three and nine months ended September 30, 2020 were calculated using the most recent available benefit valuations.

    Through the acquisition of the Roselle entities, the Company acquired a non-contributory defined benefit supplemental executive retirement plan with the only participant being a former president of Roselle Bank. For the three and nine months ended September 30, 2020 the Company recorded a net periodic benefit cost of $4,000 and $8,000, respectively, in connection with this plan.

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Fair Value Measurements

9 Months Ended

Sep. 30, 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 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 at September 30, 2020 and December 31, 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.

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.

14.    Fair Value Measurements (continued)

In addition, Level 2 instruments include Atlantic Community Bankers Bank ("ACCB") stock, which is based on redemption at par value and can only be sold to the issuing ACBB or another institution that holds 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 16 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 at September 30, 2020 and December 31, 2019, by level within the fair value hierarchy:

	September 30, 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	$	30,668	$	30,668	$	—	$	—
Mortgage-backed securities and collateralized mortgage obligations	1,134,106		—		1,134,106		—
Municipal obligations	1,885		—		1,885		—
Corporate debt securities	74,181		—		74,181		—
Trust preferred securities	4,460		—		4,460		—
Total debt securities available for sale	1,245,300		30,668		1,214,632		—
Equity securities	4,706		4,379		327		—
Derivative assets	22,305		—		22,305		—
	$	1,272,311	$	35,047	$	1,237,264	$	—
Derivative liabilities	$	47,873	$	—	$	47,873	$	—

14.    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 September 30, 2020 and December 31, 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 at September 30, 2020 and December 31, 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 6.0% and 8.0%. 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.

14.    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 September 30, 2020 and December 31, 2019, by level within the fair value hierarchy:

	September 30, 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)
Impaired loans	$	708	$	—	$	—	$	708
Mortgage servicing rights	$	774	$	—	$	—	$	774
	$	1,482	$	—	$	—	$	1,482

	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

    At September 30, 2020, there were no impaired loans or real estate owned 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 September 30, 2020 and December 31, 2019:

	September 30, 2020
	Fair Value		Valuation Methodology	Unobservable Inputs	Range of Inputs	Weighted Average
	(Dollars in thousands)
Impaired loans	$	708	Estimated cash flow	Expected value of future cash flows (1)	—%	—%
Mortgage servicing rights	$	774	Estimated cash flow	Prepayment speeds and discount rates(3)	8.9% - 27.7%	18.3%

14.    Fair Value Measurements (continued)

	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 (2)	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 11.75%.
(3) Value of SBA servicing rights based on a discount rate of 10.25%.

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 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 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.

14.    Fair Value Measurements (continued)

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 non-performing loans deemed significant 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.

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.

14.    Fair Value Measurements (continued)

    The following tables present the assets and liabilities reported on the Consolidated Statements of Financial Condition at their fair values at September 30, 2020 and December 31, 2019:

	September 30, 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	$	265,896	$	265,896	$	265,896	$	—	$	—
Debt securities available for sale	1,245,300		1,245,300		30,668		1,214,632		—
Debt securities held to maturity	272,712		288,439		5,004		283,435		—
Equity securities	4,706		4,706		4,379		327		—
Federal Home Loan Bank stock	53,416		53,416		—		53,416		—
Loans receivable, net	6,392,712		6,657,586		—		—		6,657,586
Financial liabilities:			—
Deposits	$	6,629,648	$	6,649,238	$	—	$	6,649,238	$	—
Borrowings	1,015,210		1,027,590		—		1,027,590		—
Derivative liabilities	47,873		47,873		—		47,873		—

	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		—

14.    Fair Value Measurements (continued)

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 intangibles assets, deferred tax assets, office properties and equipment, and bank-owned life insurance.

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Other Comprehensive Income (Loss)

9 Months Ended

Sep. 30, 2020

Equity [Abstract]

Other Comprehensive Income (Loss)

Other Comprehensive Income (Loss)

    The following tables present the components of other comprehensive (loss) income, both gross and net of tax, for the three and nine months ended September 30, 2020 and 2019:

	For the Three Months Ended September 30,
	2020						2019
	Before Tax		Tax Effect		After Tax		Before Tax		Tax Effect		After Tax
	(In thousands)
Components of other comprehensive (loss) income:
Unrealized (losses) gains on debt securities available for sale:	$	(3,688)	$	775	$	(2,913)	$	6,186	$	(1,271)	$	4,915
Accretion of unrealized gain on debt securities reclassified as held to maturity	(4)		—		(4)		2		—		2
Reclassification adjustment for gains included in net income	—		—		—		1,256		(291)		965
	(3,692)		775		(2,917)		7,444		(1,562)		5,882
Derivatives:
Unrealized gain (loss) on swap contracts accounted for as cash flow hedges	2,256		(471)		1,785		(1,619)		340		(1,279)
	2,256		(471)		1,785		(1,619)		340		(1,279)
Employee benefit plans:
Amortization of prior service cost included in net income	(14)		3		(11)		(14)		3		(11)
Reclassification adjustment of actuarial net gain included in net income	(1,071)		225		(846)		(930)		195		(735)
Change in funded status of retirement obligations	(41,434)		8,701		(32,733)		1,887		(397)		1,490
	(42,519)		8,929		(33,590)		943		(199)		744
Total other comprehensive (loss) income	$	(43,955)	$	9,233	$	(34,722)	$	6,768	$	(1,421)	$	5,347

15.    Other Comprehensive Income (Loss) (continued)

	For the Nine Months Ended September 30,
	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:	$	28,736	$	(6,031)	$	22,705	$	35,781	$	(7,479)	$	28,302
Accretion of unrealized gain on debt securities reclassified as held to maturity	1		—		1		13		(3)		10
Reclassification adjustment for gains included in net income	370		(81)		289		1,721		(396)		1,325
	29,107		(6,112)		22,995		37,515		(7,878)		29,637
Derivatives:
Unrealized (loss) on swap contracts accounted for as cash flow hedges	(13,050)		2,736		(10,314)		(11,059)		2,324		(8,735)
	(13,050)		2,736		(10,314)		(11,059)		2,324		(8,735)
Employee benefit plans:
Amortization of prior service cost included in net income	(42)		10		(32)		(42)		9		(33)
Reclassification adjustment of actuarial net (loss) included in net income	(3,213)		674		(2,539)		(2,779)		583		(2,196)
Change in funded status of retirement obligations	(37,093)		7,789		(29,304)		(2,785)		585		(2,200)
	(40,348)		8,473		(31,875)		(5,606)		1,177		(4,429)
Total other comprehensive (loss) income	$	(24,291)	$	5,097	$	(19,194)	$	20,850	$	(4,377)	$	16,473

15.    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 three and nine months ended September 30, 2020 and 2019:

	For the Three Months Ended September 30,
	2020								2019
	Unrealized Gains on Debt Securities Available for Sale		Unrealized (Losses) on Swaps		Employee Benefit Plans		Accumulated Other Comprehensive (Loss)		Unrealized 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	$	35,225	$	(20,573)	$	(67,859)	$	(53,207)	$	9,981	$	(9,462)	$	(61,838)	$	(61,319)
Current period changes in other comprehensive income (loss)	(2,917)		1,785		(33,590)		(34,722)		5,882		(1,279)		744		5,347
Total other comprehensive income (loss)	$	32,308	$	(18,788)	$	(101,449)	$	(87,929)	$	15,863	$	(10,741)	$	(61,094)	$	(55,972)

	For the Nine Months Ended September 30,
	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	$	9,313	$	(8,474)	$	(69,574)	$	(68,735)	$	(13,226)	$	(2,006)	$	(56,665)	$	(71,897)
Effect of adoption of ASU 2016-01	—		—		—		—		(548)		—		—		(548)
Balance at January 1,	9,313		(8,474)		(69,574)		(68,735)		(13,774)		(2,006)		(56,665)		(72,445)
Current period changes in other comprehensive income (loss)	22,995		(10,314)		(31,875)		(19,194)		29,637		(8,735)		(4,429)		16,473
Total other comprehensive income (loss)	$	32,308	$	(18,788)	$	(101,449)	$	(87,929)	$	15,863	$	(10,741)	$	(61,094)	$	(55,972)

15.    Other Comprehensive Income (Loss) (continued)

    The following tables reflect amounts reclassified from accumulated other comprehensive income (loss) to the Consolidated Statements of Income and the affected line item in the statement where net income is presented for the three and nine months ended September 30, 2020 and 2019:

	Accumulated Other Comprehensive Income (Loss) Components
	For the Three Months Ended September 30,				Affected Line Items in the Consolidated Statements of Income
	2020		2019
	(In thousands)
Reclassification adjustment for gains included in net income	$	—	$	1,256	Gain on securities transactions
Reclassification adjustment of actuarial net (loss) included in net income	(1,071)		(930)		Other non-interest expense
Total before tax	(1,071)		326
Income (tax) benefit	225		(96)
Net of tax	$	(846)	$	230

	Accumulated Other Comprehensive Income (Loss) Components
	For the Nine Months Ended September 30,				Affected Line Items in the Consolidated Statements of Income
	2020		2019
	(In thousands)
Reclassification adjustment for gains included in net income	$	370	$	1,721	Gain on securities transactions
Reclassification adjustment of actuarial net (loss) included in net income	(3,213)		(2,779)		Other non-interest expense
Total before tax	(2,843)		(1,058)
Income (tax) benefit	593		187
Net of tax	$	(2,250)	$	(871)

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Derivatives and Hedging Activities

9 Months Ended

Sep. 30, 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 risk 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 September 30, 2020 and December 31, 2019, the Company had no currency forward contracts in place with commercial banking customers.

    Interest Rate Swaps. At September 30, 2020, the Company had interest rate swaps in place with 46 commercial banking customers executed by offsetting interest rate swaps with third parties, with an aggregated notional amount of $170.9 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 September 30, 2020 and December 31, 2019, the Company had 32 and 29 interest rate swaps with notional amounts of $445.0 million and $410.0 million, respectively, hedging certain FHLB advances. These interest rate swaps meet the cash flow hedge accounting requirements. Interest rate swaps designated as cash flow hedges involve the receipt of variable amounts from a counter-party in exchange for the Company making fixed-rate payments over the life of the agreements without the exchange of the underlying notional amount.

    For the three and nine months ended September 30, 2020 and 2019, the Company did not record any hedge ineffectiveness associated with these contracts.

16.    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 September 30, 2020 and December 31, 2019:

	September 30, 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	$	22,305	Other Liabilities	$	47,873
Total derivative instruments		$	22,305		$	47,873

	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 three months ended September 30, 2020 and 2019, (gains)/losses of $(44,000) and $75,000, respectively, were recorded for changes in fair value of interest rate swaps with third parties. For the nine months ended September 30, 2020 and 2019, losses of $406,000 and $288,000, respectively, were recorded for changes in fair value of interest rate swaps with third parties.

    At September 30, 2020 and December 31, 2019, accrued interest was $1.1 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 September 30, 2020, the termination value of derivatives in a net liability position, which includes accrued interest, was $24.5 million. The Company has collateral posting thresholds with certain of its derivative counterparties, and has posted collateral of $47.1 million against its obligations under these agreements.

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Revenue Recognition

9 Months Ended

Sep. 30, 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.    

17.     Revenue Recognition (continued)

    The following table presents non-interest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the three and nine months ended September 30, 2020 and 2019.

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2020		2019		2020		2019
	(In thousands)
Non-interest income
In-scope of Topic 606:
Demand deposit account fees	$	787	$	1,106	$	2,706	$	3,116
Title insurance fees	1,218		1,350		3,445		3,490
Other non-interest income	1,749		1,189		4,688		3,467
Total in-scope non-interest income	3,754		3,645		10,839		10,073
Total out-of-scope non-interest income	4,155		6,470		10,469		12,855
Total non-interest income	$	7,909	$	10,115	$	21,308	$	22,928

    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 on loan level interest rate 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

9 Months Ended

Sep. 30, 2020

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events

    The Company has evaluated events subsequent to September 30, 2020 and through the financial statement issuance date of November 9, 2020. 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)

9 Months Ended

Sep. 30, 2020

Accounting Standards Update and Change in Accounting Principle [Abstract]

Recent Accounting Pronouncements

Accounting Pronouncements Adopted in 2020

    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 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 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.

5.    Summary of Significant Accounting Policies (continued)

Accounting Pronouncements Adopted in 2020 (continued)

    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 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 platformto 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 10 for more information regarding adoption.

Accounting Pronouncements Not Yet Adopted

    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.

    The Company elected to defer the adoption of the CECL methodology permitted by the recently enacted Coronavirus Aid, Relief and Economic Security Act ("CARES Act"). The Company will adopt CECL at the earlier of December 31, 2020 or when the national emergency concerning the COVID-19 outbreak has concluded. The Company 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 September 30, 2020, we currently expect the adoption of ASU 2016-13 will result in an increase between 5% and 10% in our allowance for loan losses and our reserves for unfunded commitments.

5.    Summary of Significant Accounting Policies (continued)

Accounting Pronouncements Not Yet Adopted (continued)

    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.

    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 is currently evaluating the effect of ASU 2018-14 on its disclosures in the Company's consolidated financial statements, and as its adoption is only disclosure related, does not expect it will have a significant impact on the Company's consolidated financial statements.

Fair Value Measurements

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.

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.

14.    Fair Value Measurements (continued)

In addition, Level 2 instruments include Atlantic Community Bankers Bank ("ACCB") stock, which is based on redemption at par value and can only be sold to the issuing ACBB or another institution that holds 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 16 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.

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 6.0% and 8.0%. 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.

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 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 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.

14.    Fair Value Measurements (continued)

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 non-performing loans deemed significant 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.

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.

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 intangibles assets, deferred tax assets, office properties and equipment, and bank-owned life insurance.

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Acquisitions (Tables)

9 Months Ended

Sep. 30, 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 acquisition of the Roselle Entities, at their estimated fair values as of the closing date of the transaction:

	April 1, 2020
	(In thousands)
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 asset, 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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Earnings per Share (Tables)

9 Months Ended

Sep. 30, 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 three and nine months ended September 30, 2020 and 2019:     

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2020		2019		2020		2019
	(Dollars in thousands, except per share data)
Net income	$	15,087	$	14,218	$	36,949	$	41,168
Shares:
Weighted average shares outstanding - basic	110,983,871		111,371,754		110,177,736		111,486,179
Weighted average dilutive shares outstanding	—		—		—		—
Weighted average shares outstanding - diluted	110,983,871		111,371,754		110,177,736		111,486,179
Earnings per share:
Basic	$	0.14	$	0.13	$	0.34	$	0.37
Diluted	$	0.14	$	0.13	$	0.34	$	0.37

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Debt Securities Available for Sale (Tables)

9 Months Ended

Sep. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Schedule of amortized cost, gross unrealized gains, gross unrealized losses and the fair value of securities available-for-sale

Debt securities available for sale at September 30, 2020 and December 31, 2019 are summarized as follows:

	September 30, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
			(In thousands)
U.S. government and agency obligations	$	29,421	$	1,247	$	—	$	30,668
Mortgage-backed securities and collateralized mortgage obligations	1,095,120		39,429		(443)		1,134,106
Municipal obligations	1,870		15		—		1,885
Corporate debt securities	72,590		2,096		(505)		74,181
Trust preferred securities	5,000		—		(540)		4,460
	$	1,204,001	$	42,787	$	(1,488)	$	1,245,300

	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

Schedule of securities by contractual maturity

The amortized cost and fair value of debt securities available for sale at September 30, 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.

	September 30, 2020
	Amortized Cost		Fair Value
	(In thousands)
One year or less	$	16,399	$	16,416
More than one year to five years	42,422		44,295
More than five years to ten years	49,590		50,000
More than ten years	470		483
	$	108,881	$	111,194
Mortgage-backed securities and collateralized mortgage obligations	1,095,120		1,134,106
	$	1,204,001	$	1,245,300

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 September 30, 2020 and December 31, 2019 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	September 30, 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	$	138,268	$	(367)	$	36,897	$	(76)	$	175,165	$	(443)
Corporate debt securities	993		(7)		4,503		(498)		5,496		(505)
Trust preferred securities	—		—		4,459		(540)		4,459		(540)
	$	139,261	$	(374)	$	45,859	$	(1,114)	$	185,120	$	(1,488)

6.    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)

9 Months Ended

Sep. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Schedule of amortized cost, gross unrealized gains, gross unrealized losses and the fair value of securities held-to-maturity

Debt securities held to maturity at September 30, 2020 and December 31, 2019 are summarized as follows:

	September 30, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
	(In thousands)
U.S. government and agency obligations	$	5,000	$	4	$	—	$	5,004
Mortgage-backed securities and collateralized mortgage obligations	$	267,712	$	15,754	$	(31)	$	283,435
	$	272,712	$	15,758	$	(31)	$	288,439

	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

Schedule of held-to-maturity securities reported in a continuous unrealized loss position

The following tables summarize the fair value and gross unrealized losses of those securities that reported an unrealized loss at September 30, 2020 and December 31, 2019 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	September 30, 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	$	2,695	$	(6)	$	1,883	$	(25)	$	4,578	$	(31)

	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)

9 Months Ended

Sep. 30, 2020

Receivables [Abstract]

Schedule of loans receivable

Loans receivable at September 30, 2020 and December 31, 2019 are summarized as follows:

	September 30,		December 31,
	2020		2019
	(In thousands)
Real estate loans:
One-to-four family	$	2,053,293	$	2,077,079
Multifamily and commercial	2,863,718		2,919,985
Construction	307,659		298,942
Commercial business loans	884,931		483,215
Consumer loans:
Home equity loans and advances	340,962		388,127
Other consumer loans	1,538		1,960
Total gross loans	6,452,101		6,169,308
Purchased credit-impaired loans	6,706		7,021
Net deferred loan costs, fees and purchased premiums and discounts	10,038		21,237
Loans receivable	$	6,468,845	$	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 September 30, 2020 and December 31, 2019:

	September 30, 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	$	4,347	$	542	$	1,760	$	6,649	$	2,881	$	2,043,763	$	2,053,293
Multifamily and commercial	600		1,772		2,798		5,170		2,995		2,855,553		2,863,718
Construction	80		—		—		80		—		307,579		307,659
Commercial business loans	2,910		2,643		2,698		8,251		4,536		872,144		884,931
Consumer loans:
Home equity loans and advances	1,610		186		323		2,119		499		338,344		340,962
Other consumer loans	1		1		—		2		—		1,536		1,538
Total loans	$	9,548	$	5,144	$	7,579	$	22,271	$	10,911	$	6,418,919	$	6,452,101

	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 changes in accretable yield for PCI loans for the three and nine months ended September 30, 2020. There were no PCI loans outstanding for the three and nine months ended September 30, 2019.

	Three Months Ended September 30, 2020		Nine Months Ended September 30, 2020
	(In thousands)
Balance at beginning of period	$	471	$	511
Acquisition	—		58
Accretion	(58)		(156)
Net change in expected cash flows	1		1
Balance at end of period	$	414	$	414

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 September 30, 2020 and December 31, 2019:

	September 30, 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	$	406	$	550	$	—	$	871	$	12	$	—	$	1,839
Collectively evaluated for impairment	15,369		30,439		10,534		16,631		1,314		7		74,294
Loans acquired with deteriorated credit quality	—		—		—		—		—		—		—
Total	$	15,775	$	30,989	$	10,534	$	17,502	$	1,326	$	7	$	76,133
Total loans:
Individually evaluated for impairment	$	7,230	$	32,090	$	—	$	4,664	$	1,862	$	—	$	45,846
Collectively evaluated for impairment	2,046,063		2,831,628		307,659		880,267		339,100		1,538		6,406,255
Loans acquired with deteriorated credit quality	291		4,923		—		1,492		—		—		6,706
Total loans	$	2,053,584	$	2,868,641	$	307,659	$	886,423	$	340,962	$	1,538	$	6,458,807

9.    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 by portfolio segment for the three and nine months ended September 30, 2020 and 2019 are as follows:

	For the Three Months Ended September 30,
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
2020
Balance at beginning of period	$	16,633	$	27,330	$	10,217	$	18,314	$	1,514	$	7	$	74,015
Provision charged (credited)	(758)		3,659		317		(573)		(129)		—		2,516
Recoveries	87		—		—		128		32		—		247
Charge-offs	(187)		—		—		(367)		(91)		—		(645)
Balance at end of period	$	15,775	$	30,989	$	10,534	$	17,502	$	1,326	$	7	$	76,133
2019
Balance at beginning of period	$	15,610	$	22,679	$	8,806	$	12,718	$	2,583	$	7	$	62,403
Provision charged (credited)	347		290		(1,047)		2,040		(474)		1		1,157
Recoveries	4		—		1		8		22		—		35
Charge-offs	(228)		—		—		(738)		—		—		(966)
Balance at end of period	$	15,733	$	22,969	$	7,760	$	14,028	$	2,131	$	8	$	62,629

9.    Loans Receivable and Allowance for Loan Losses (continued)

	For the Nine Months Ended September 30,
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
2020
Balance at beginning of period	$	13,780	$	22,980	$	7,435	$	15,836	$	1,669	$	9	$	61,709
Provision charged (credited)	2,292		7,998		3,098		4,685		(253)		—		17,820
Recoveries	329		12		1		211		55		—		608
Charge-offs	(626)		(1)		—		(3,230)		(145)		(2)		(4,004)
Balance at end of period	$	15,775	$	30,989	$	10,534	$	17,502	$	1,326	$	7	$	76,133
2019
Balance at beginning of period	$	15,232	$	23,251	$	7,217	$	14,176	$	2,458	$	8	$	62,342
Provision charged (credited)	1,215		(282)		541		485		(255)		1		1,705
Recoveries	29		—		2		374		29		—		434
Charge-offs	(743)		—		—		(1,007)		(101)		(1)		(1,852)
Balance at end of period	$	15,733	$	22,969	$	7,760	$	14,028	$	2,131	$	8	$	62,629

Schedule of troubled debt restructuring

The following table presents the number of loans modified as TDRs during the three and nine months ended September 30, 2020 and 2019, 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.

	For the Three Months Ended September 30,
	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	4	$	16,387	$	16,387	—	$	—	$	—
Commercial business loans	1	1,295		1,295		—	—		—
Total restructured loans	5	$	17,682	$	17,682	—	$	—	$	—

	For the Nine Months Ended September 30,
	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	4	$	16,387	$	16,387	—	$	—	$	—
Commercial business loans	2	11,507		12,802		1	4,095		4,095
Total restructured loans	6	$	27,894	$	29,189	1	$	4,095	$	4,095

Schedule of loans individually evaluated for impairment

The following tables present loans individually evaluated for impairment by loan segment, excluding PCI loans, at September 30, 2020 and December 31, 2019:

	At September 30, 2020
	Recorded Investment		Unpaid Principal Balance		Specific Allowance
	(In thousands)
With no allowance recorded:
Real estate loans:
One-to-four family	$	2,825	$	3,616	$	—
Multifamily and commercial	20,389		20,426		—
Commercial business loans	2,577		2,680		—
Consumer loans:
Home equity loans and advances	708		845		—
	26,499		27,567		—
With a specific allowance recorded:
Real estate loans:
One-to-four family	4,405		4,420		406
Multifamily and commercial	11,701		12,316		550
Commercial business loans	2,087		5,429		871
Consumer loans:
Home equity loans and advances	1,154		1,154		12
	19,347		23,319		1,839
Total:
Real estate loans:
One-to-four family	7,230		8,036		406
Multifamily and commercial	32,090		32,742		550
Commercial business loans	4,664		8,109		871
Consumer loans:
Home equity loans and advances	1,862		1,999		12
Total loans	$	45,846	$	50,886	$	1,839

9.    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
	$	18,811	$	24,017	$	1,621

The following tables present interest income recognized for loans individually evaluated for impairment, by loan segment, excluding PCI loans for the three and nine months ended September 30, 2020 and 2019:

	For the Three Months Ended September 30,
	2020				2019
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(In thousands)
Real estate loans:
One-to-four family	$	8,020	$	74	$	8,773	$	101
Multifamily and commercial	23,525		227		2,637		37
Construction	—		—		850		—
Commercial business loans	4,979		52		7,461		88
Consumer loans:
Home equity loans and advances	1,935		28		2,629		35
Total loans	$	38,459	$	381	$	22,350	$	261

	For the Nine Months Ended September 30,
	2020				2019
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(In thousands)
Real estate loans:
One-to-four family	$	8,175	$	226	$	9,144	$	340
Multifamily and commercial	20,670		653		2,667		111
Construction	—		—		850		—
Commercial business loans	5,468		196		5,848		268
Consumer loans:
Home equity loans and advances	1,995		85		2,866		122
Total loans	$	36,308	$	1,160	$	21,375	$	841

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 September 30, 2020 and December 31, 2019:

	September 30, 2020
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Pass	$	2,046,613	$	2,828,021	$	307,659	$	869,122	$	340,047	$	1,538	$	6,393,000
Special mention	408		15,819		—		8,061		—		—		24,288
Substandard	6,272		19,878		—		7,748		915		—		34,813
Doubtful	—		—		—		—		—		—		—
Loss	—		—		—		—		—		—		—
Total	$	2,053,293	$	2,863,718	$	307,659	$	884,931	$	340,962	$	1,538	$	6,452,101

	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	—		—		—		—		—		—		—
Loss	—		—		—		—		—		—		—
Total	$	2,077,079	$	2,919,985	$	298,942	$	483,215	$	388,127	$	1,960	$	6,169,308

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Leases (Tables)

9 Months Ended

Sep. 30, 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 September 30, 2020	Lease Payment Obligations
	(In thousands)
2020	$	1,037
2021	4,010
2022	3,624
2023	3,310
2024	2,586
Thereafter	8,534
Total undiscounted cash flows	23,101
Discount on cash flows	(2,093)
Total lease liability	$21,008

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Deposits (Tables)

9 Months Ended

Sep. 30, 2020

Deposits [Abstract]

Schedule of Deposits

Deposits at September 30, 2020 and December 31, 2019 are summarized as follows:

	September 30,		December 31,
	2020		2019
	(In thousands)
Non-interest-bearing demand	$	1,341,248	$	958,442
Interest-bearing demand	2,033,729		1,720,383
Money market accounts	540,723		410,392
Savings and club deposits	652,970		543,480
Certificates of deposit	2,060,978		2,013,145
Total deposits	$	6,629,648	$	5,645,842

Schedule of Certificate Accounts by Maturity

Scheduled maturities of certificates of deposit accounts at September 30, 2020 and December 31, 2019 are summarized as follows:

	September 30,		December 31,
	2020		2019
	(In thousands)
One year or less	$	1,543,088	$	1,293,613
After one year to two years	390,328		548,995
After two years to three years	55,389		142,458
After three years to four years	24,618		11,362
After four years	47,555		16,717
	$	2,060,978	$	2,013,145

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Stock Based Compensation (Tables)

9 Months Ended

Sep. 30, 2020

Share-based Payment Arrangement [Abstract]

Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity

The following is a summary of the Company's restricted stock activity during the three and nine months ended September 30, 2020 and 2019:

	Number of Restricted Shares	Weighted Average Grant Date Fair Value
Non-vested at January 1, 2020	1,420,012	$	15.67
Grants	—	—
Forfeited	(881)	16.60
Non-vested at March 31, 2020	1,419,131	$	15.67
Forfeited	(240)	15.60
Non-vested at June 30, 2020	1,418,891	$	15.67
Vested	(167,427)	15.62
Forfeited	(15,390)	16.07
Non-vested at September 30, 2020	1,236,074	$	15.68

12.    Stock Based Compensation (Continued)

	Number of Restricted Shares	Weighted Average Grant Date Fair Value
Non-vested at January 1, 2019	—	$	—
Grants	1,389,570	15.60
Non-vested at September 30, 2019	1,389,570	$	15.60

Share-based Payment Arrangement, Option, Activity

The following is a summary of the Company's option activity during the three and nine months ended September 30, 2020 and 2019:

	Number of Stock Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding, January 1, 2020	3,784,044	$	15.67	9.6	$	4,812,490
Forfeited	(9,707)	15.60		—	—
Outstanding, March 31, 2020	3,774,337	$	15.67	9.3	$	—
Forfeited	(2,647)	15.60		—	—
Outstanding, June 30, 2020	3,771,690	$	15.67	9.1	$	—
Forfeited	(44,485)	15.95		—	—
Outstanding, September 30, 2020	3,727,205	$	15.67	8.8	$	—
Options exercisable at September 30, 2020	727,438	$	15.62	8.7	$	—

12.    Stock Based Compensation (Continued)

	Number of Stock Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding, January 1, 2019	—	$	—	—	$	—
Granted	3,707,901	15.60		9.8	704,501
Outstanding, September 30, 2019	3,707,901	$	15.60	9.8	$	704,501
Options exercisable at September 30, 2019	—	$	—	—	$	—

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Components of Net Periodic Benefit Costs (Tables)

9 Months Ended

Sep. 30, 2020

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

Net periodic benefit (income) cost for Pension Plan, RIM Plan, Post-retirement Plan and split-dollar life insurance arrangement plan benefits for the three and nine months ended September 30, 2020 and 2019, includes the following components:

13.    Components of Net Periodic Benefit Cost (continued)

	For the Three Months Ended September 30,
	Pension Plan				RIM Plan				Post-retirement Plan				Split-Dollar Life Insurance
	2020		2019		2020		2019		2020		2019		2020		2019		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	2,032	$	1,746	$	67	$	53	$	99	$	84	$	120	$	88	Compensation and employee benefits
Interest cost	1,824		2,090		102		116		171		207		135		114		Other non-interest expense
Expected return on plan assets	(5,908)		(5,802)		—		—		—		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		—		—		—		14		14		Other non-interest expense
Net loss	1,492		770		99		61		77		37		113		62		Other non-interest expense
Net periodic (income) benefit cost	$	(560)	$	(1,196)	$	268	$	230	$	347	$	328	$	382	$	278

	For the Nine Months Ended September 30,
	Pension Plan				RIM Plan				Post-retirement Plan				Split-Dollar Life Insurance
	2020		2019		2020		2019		2020		2019		2020		2019		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	5,906	$	4,748	$	201	$	159	$	297	$	252	$	346	$	264	Compensation and employee benefits
Interest cost	5,887		6,478		306		348		513		621		384		342		Other non-interest expense
Expected return on plan assets	(17,383)		(15,256)		—		—		—		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		—		—		—		42		42		Other non-interest expense
Net loss	3,054		2,300		297		183		231		111		339		186		Other non-interest expense
Net periodic (income) benefit cost	$	(2,536)	$	(1,730)	$	804	$	690	$	1,041	$	984	$	1,111	$	834

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 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 at September 30, 2020 and December 31, 2019, by level within the fair value hierarchy:

	September 30, 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	$	30,668	$	30,668	$	—	$	—
Mortgage-backed securities and collateralized mortgage obligations	1,134,106		—		1,134,106		—
Municipal obligations	1,885		—		1,885		—
Corporate debt securities	74,181		—		74,181		—
Trust preferred securities	4,460		—		4,460		—
Total debt securities available for sale	1,245,300		30,668		1,214,632		—
Equity securities	4,706		4,379		327		—
Derivative assets	22,305		—		22,305		—
	$	1,272,311	$	35,047	$	1,237,264	$	—
Derivative liabilities	$	47,873	$	—	$	47,873	$	—

14.    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 September 30, 2020 and December 31, 2019, by level within the fair value hierarchy:

	September 30, 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)
Impaired loans	$	708	$	—	$	—	$	708
Mortgage servicing rights	$	774	$	—	$	—	$	774
	$	1,482	$	—	$	—	$	1,482

	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 September 30, 2020 and December 31, 2019:

	September 30, 2020
	Fair Value		Valuation Methodology	Unobservable Inputs	Range of Inputs	Weighted Average
	(Dollars in thousands)
Impaired loans	$	708	Estimated cash flow	Expected value of future cash flows (1)	—%	—%
Mortgage servicing rights	$	774	Estimated cash flow	Prepayment speeds and discount rates(3)	8.9% - 27.7%	18.3%

14.    Fair Value Measurements (continued)

	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 (2)	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 11.75%.
(3) Value of SBA servicing rights based on a discount rate of 10.25%.

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 at September 30, 2020 and December 31, 2019:

	September 30, 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	$	265,896	$	265,896	$	265,896	$	—	$	—
Debt securities available for sale	1,245,300		1,245,300		30,668		1,214,632		—
Debt securities held to maturity	272,712		288,439		5,004		283,435		—
Equity securities	4,706		4,706		4,379		327		—
Federal Home Loan Bank stock	53,416		53,416		—		53,416		—
Loans receivable, net	6,392,712		6,657,586		—		—		6,657,586
Financial liabilities:			—
Deposits	$	6,629,648	$	6,649,238	$	—	$	6,649,238	$	—
Borrowings	1,015,210		1,027,590		—		1,027,590		—
Derivative liabilities	47,873		47,873		—		47,873		—

	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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Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 30, 2020

Equity [Abstract]

Schedule of Other Comprehensive Income (Loss)

The following tables present the components of other comprehensive (loss) income, both gross and net of tax, for the three and nine months ended September 30, 2020 and 2019:

	For the Three Months Ended September 30,
	2020						2019
	Before Tax		Tax Effect		After Tax		Before Tax		Tax Effect		After Tax
	(In thousands)
Components of other comprehensive (loss) income:
Unrealized (losses) gains on debt securities available for sale:	$	(3,688)	$	775	$	(2,913)	$	6,186	$	(1,271)	$	4,915
Accretion of unrealized gain on debt securities reclassified as held to maturity	(4)		—		(4)		2		—		2
Reclassification adjustment for gains included in net income	—		—		—		1,256		(291)		965
	(3,692)		775		(2,917)		7,444		(1,562)		5,882
Derivatives:
Unrealized gain (loss) on swap contracts accounted for as cash flow hedges	2,256		(471)		1,785		(1,619)		340		(1,279)
	2,256		(471)		1,785		(1,619)		340		(1,279)
Employee benefit plans:
Amortization of prior service cost included in net income	(14)		3		(11)		(14)		3		(11)
Reclassification adjustment of actuarial net gain included in net income	(1,071)		225		(846)		(930)		195		(735)
Change in funded status of retirement obligations	(41,434)		8,701		(32,733)		1,887		(397)		1,490
	(42,519)		8,929		(33,590)		943		(199)		744
Total other comprehensive (loss) income	$	(43,955)	$	9,233	$	(34,722)	$	6,768	$	(1,421)	$	5,347

15.    Other Comprehensive Income (Loss) (continued)

	For the Nine Months Ended September 30,
	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:	$	28,736	$	(6,031)	$	22,705	$	35,781	$	(7,479)	$	28,302
Accretion of unrealized gain on debt securities reclassified as held to maturity	1		—		1		13		(3)		10
Reclassification adjustment for gains included in net income	370		(81)		289		1,721		(396)		1,325
	29,107		(6,112)		22,995		37,515		(7,878)		29,637
Derivatives:
Unrealized (loss) on swap contracts accounted for as cash flow hedges	(13,050)		2,736		(10,314)		(11,059)		2,324		(8,735)
	(13,050)		2,736		(10,314)		(11,059)		2,324		(8,735)
Employee benefit plans:
Amortization of prior service cost included in net income	(42)		10		(32)		(42)		9		(33)
Reclassification adjustment of actuarial net (loss) included in net income	(3,213)		674		(2,539)		(2,779)		583		(2,196)
Change in funded status of retirement obligations	(37,093)		7,789		(29,304)		(2,785)		585		(2,200)
	(40,348)		8,473		(31,875)		(5,606)		1,177		(4,429)
Total other comprehensive (loss) income	$	(24,291)	$	5,097	$	(19,194)	$	20,850	$	(4,377)	$	16,473

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 three and nine months ended September 30, 2020 and 2019:

	For the Three Months Ended September 30,
	2020								2019
	Unrealized Gains on Debt Securities Available for Sale		Unrealized (Losses) on Swaps		Employee Benefit Plans		Accumulated Other Comprehensive (Loss)		Unrealized 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	$	35,225	$	(20,573)	$	(67,859)	$	(53,207)	$	9,981	$	(9,462)	$	(61,838)	$	(61,319)
Current period changes in other comprehensive income (loss)	(2,917)		1,785		(33,590)		(34,722)		5,882		(1,279)		744		5,347
Total other comprehensive income (loss)	$	32,308	$	(18,788)	$	(101,449)	$	(87,929)	$	15,863	$	(10,741)	$	(61,094)	$	(55,972)

	For the Nine Months Ended September 30,
	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	$	9,313	$	(8,474)	$	(69,574)	$	(68,735)	$	(13,226)	$	(2,006)	$	(56,665)	$	(71,897)
Effect of adoption of ASU 2016-01	—		—		—		—		(548)		—		—		(548)
Balance at January 1,	9,313		(8,474)		(69,574)		(68,735)		(13,774)		(2,006)		(56,665)		(72,445)
Current period changes in other comprehensive income (loss)	22,995		(10,314)		(31,875)		(19,194)		29,637		(8,735)		(4,429)		16,473
Total other comprehensive income (loss)	$	32,308	$	(18,788)	$	(101,449)	$	(87,929)	$	15,863	$	(10,741)	$	(61,094)	$	(55,972)

Reclassification out of AOCI

The following tables reflect amounts reclassified from accumulated other comprehensive income (loss) to the Consolidated Statements of Income and the affected line item in the statement where net income is presented for the three and nine months ended September 30, 2020 and 2019:

	Accumulated Other Comprehensive Income (Loss) Components
	For the Three Months Ended September 30,				Affected Line Items in the Consolidated Statements of Income
	2020		2019
	(In thousands)
Reclassification adjustment for gains included in net income	$	—	$	1,256	Gain on securities transactions
Reclassification adjustment of actuarial net (loss) included in net income	(1,071)		(930)		Other non-interest expense
Total before tax	(1,071)		326
Income (tax) benefit	225		(96)
Net of tax	$	(846)	$	230

	Accumulated Other Comprehensive Income (Loss) Components
	For the Nine Months Ended September 30,				Affected Line Items in the Consolidated Statements of Income
	2020		2019
	(In thousands)
Reclassification adjustment for gains included in net income	$	370	$	1,721	Gain on securities transactions
Reclassification adjustment of actuarial net (loss) included in net income	(3,213)		(2,779)		Other non-interest expense
Total before tax	(2,843)		(1,058)
Income (tax) benefit	593		187
Net of tax	$	(2,250)	$	(871)

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Derivatives and Hedging Activities (Tables)

9 Months Ended

Sep. 30, 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 September 30, 2020 and December 31, 2019:

	September 30, 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	$	22,305	Other Liabilities	$	47,873
Total derivative instruments		$	22,305		$	47,873

	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)

9 Months Ended

Sep. 30, 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 three and nine months ended September 30, 2020 and 2019.

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2020		2019		2020		2019
	(In thousands)
Non-interest income
In-scope of Topic 606:
Demand deposit account fees	$	787	$	1,106	$	2,706	$	3,116
Title insurance fees	1,218		1,350		3,445		3,490
Other non-interest income	1,749		1,189		4,688		3,467
Total in-scope non-interest income	3,754		3,645		10,839		10,073
Total out-of-scope non-interest income	4,155		6,470		10,469		12,855
Total non-interest income	$	7,909	$	10,115	$	21,308	$	22,928

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Acquisitions - Narrative (Details)		3 Months Ended		9 Months Ended
	Apr. 01, 2020 USD ($) shares	Sep. 30, 2020 USD ($) branch	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) branch	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)	Nov. 01, 2019 USD ($) branch $ / shares
Business Acquisition [Line Items]
Assets		$ 8,865,473,000		$ 8,865,473,000		$ 8,188,694,000
Net loans receivable		6,392,712,000		6,392,712,000		6,135,857,000
Liabilities		7,848,143,000		7,848,143,000		7,206,177,000
Deposits		6,629,648,000		6,629,648,000		5,645,842,000
Borrowings		1,015,210,000		1,015,210,000		$ 1,407,022,000
Merger-related expenses		424,000	$ 740,000	1,931,000	$ 1,202,000
Goodwill		$ 0		$ 0
Branch closures
Business Acquisition [Line Items]
Number of branches closed | branch		4		4
Loss on branch closures				$ 770,000
Stewardship Financial Corporation
Business Acquisition [Line Items]
Assets							$ 956,000,000.0
Net loans receivable							756,900,000
Securities							52,600,000
Liabilities							877,800,000
Deposits							781,400,000
Borrowings							$ 81,800,000
Number of stores | branch							12
Stewardship Financial Corporation
Business Acquisition [Line Items]
Business acquisition, share price (in dollars per share) | $ / shares							$ 15.75
Merger-related expenses		$ 248,000	740,000	1,300,000	1,200,000
Roselle Entities
Business Acquisition [Line Items]
Merger-related expenses		$ 175,000	$ 0	$ 618,000	$ 0
Business acquisition, equity interest issued or issuable (in shares) | shares	4,759,048
Goodwill	$ 23,809,000
Minimum | Equipment | Roselle Entities
Business Acquisition [Line Items]
Property, plant and equipment, useful life				3 years
Maximum | Equipment | Roselle Entities
Business Acquisition [Line Items]
Property, plant and equipment, useful life				10 years

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Acquisitions - Assets Acquired and Liabilities Assumed in Roselle Acquisition (Details) - USD ($)	Apr. 01, 2020	Sep. 30, 2020
Liabilities assumed:
Goodwill		$ 0
Roselle Entities
Assets acquired:
Cash and cash equivalents	$ 155,248,000
Debt securities available for sale	51,479,000
Debt securities held to maturity	13,418,000
Equity securities	1,796,000
Federal Home Loan Bank stock	2,010,000
Loans receivable	171,593,000
Accrued interest receivable	679,000
Office properties and equipment, net	5,774,000
Bank-owned life insurance	17,245,000
Deferred tax asset, net	1,334,000
Other assets	1,489,000
Total assets acquired	422,065,000
Liabilities assumed:
Deposits	333,234,000
Borrowings	37,728,000
Advance payments by borrowers for taxes and insurance	982,000
Accrued expenses and other liabilities	5,400,000
Total liabilities assumed	377,344,000
Net assets acquired	44,721,000
Fair market value of stock issued to Columbia Bank MHC for purchase	68,530,000
Goodwill	$ 23,809,000

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Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net income	$ 15,087	$ 14,218	$ 36,949	$ 41,168
Shares:
Weighted average shares outstanding - basic (in shares)	110,983,871	111,371,754	110,177,736	111,486,179
Effect of dilutive common stock equivalents (in shares)	0	0	0	0
Weighted average shares outstanding - diluted (in shares)	110,983,871	111,371,754	110,177,736	111,486,179
Earnings per share:
Basic (in dollars per share)	$ 0.14	$ 0.13	$ 0.34	$ 0.37
Diluted (in dollars per share)	$ 0.14	$ 0.13	$ 0.34	$ 0.37
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	2,272,060	790,000	1,436,476	310,000

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Stock Repurchase Program (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended		9 Months Ended
	Sep. 10, 2020	Dec. 05, 2019	Jun. 13, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Equity [Abstract]
Stock repurchase program, 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%
Stock repurchase program, number of additional shares authorized to be repurchased (in shares)		3,000,000
Shares repurchased, number of shares (in shares)				624,932	2,478,400	4,081,132	2,742,300
Shares repurchased, value				$ 6,925	$ 38,217	$ 60,286	$ 42,084
Shares repurchased, price per share (in dollars per share)				$ 11.08	$ 15.42	$ 14.78	$ 15.35

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Summary of Significant Accounting Policies - Narrative (Details)	3 Months Ended		9 Months Ended	12 Months Ended
	Dec. 31, 2020	Mar. 31, 2019	Sep. 30, 2020	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201601Member	us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201601Member
Maximum | ASU 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing receivable, allowance for credit loss, period increase (decrease), percent			10.00%
Forecast | Minimum | ASU 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing receivable, allowance for credit loss, period increase (decrease), percent	5.00%

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Debt Securities Available for Sale - Securities Available-for-Sale (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,204,001	$ 1,086,143
Gross Unrealized Gains	42,787	14,248
Gross Unrealized (Losses)	(1,488)	(2,055)
Debt securities available for sale, at fair value	1,245,300	1,098,336
U.S. government and agency obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	29,421	42,081
Gross Unrealized Gains	1,247	321
Gross Unrealized (Losses)	0	(16)
Debt securities available for sale, at fair value	30,668	42,386
Mortgage-backed securities and collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,095,120	968,165
Gross Unrealized Gains	39,429	12,981
Gross Unrealized (Losses)	(443)	(1,265)
Debt securities available for sale, at fair value	1,134,106	979,881
Municipal obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,870	2,284
Gross Unrealized Gains	15	1
Gross Unrealized (Losses)	0	(1)
Debt securities available for sale, at fair value	1,885	2,284
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	72,590	68,613
Gross Unrealized Gains	2,096	945
Gross Unrealized (Losses)	(505)	(378)
Debt securities available for sale, at fair value	74,181	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)	(540)	(395)
Debt securities available for sale, at fair value	$ 4,460	$ 4,605

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Debt Securities Available for Sale - Expected Maturities of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Amortized Cost
Amortized Cost	$ 1,204,001	$ 1,086,143
Fair Value
Fair Value	1,245,300	1,098,336
Debt Securities excluding Mortgage-based securities and CMOs
Amortized Cost
One year or less	16,399
More than one year to five years	42,422
More than five years to ten years	49,590
More than ten years	470
Amortized Cost	108,881
Fair Value
One year or less	16,416
More than one year to five years	44,295
More than five years to ten years	50,000
More than ten years	483
Fair Value	111,194
Mortgage-backed securities and collateralized mortgage obligations
Amortized Cost
Amortized Cost	1,095,120	968,165
Fair Value
Fair Value	$ 1,134,106	$ 979,881

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Debt Securities Available for Sale - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) security	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) security	Sep. 30, 2019 USD ($) security	Dec. 31, 2019 USD ($) security
Debt Securities, Available-for-sale [Line Items]
Amortized cost	$ 1,204,001,000		$ 1,204,001,000		$ 1,086,143,000
Debt securities available for sale, at fair value	1,245,300,000		1,245,300,000		1,098,336,000
Proceeds from sales of debt securities available for sale	0	$ 16,100,000	20,761,000	$ 31,811,000
Gross gains on sale of available-for-sale securities		1,200,000	369,000	1,500,000
Gross losses on sale of available-for-sale securities		0	0	0
Proceeds from calls of debt securities available for sale		0	6,600,000	$ 0
Sale and maturity of debt securities, available-for-sale	797,000		5,800,000
Calls of debt securities, available-for-sale, realized gain			1,000
Calls of debt securities, available-for-sale, unrealized loss			0
Number of debt securities called | security				1
Debt securities, available-for-sale, restricted	$ 800,900,000		$ 800,900,000		$ 462,000,000.0
Number of securities in unrealized loss position | security	41		41		97
Other-than-temporary impairments charge on debt securities available for sale	$ 0	$ 0	$ 0	$ 0
Mortgage-backed securities and collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized cost	1,095,120,000		1,095,120,000		$ 968,165,000
Debt securities available for sale, at fair value	$ 1,134,106,000		$ 1,134,106,000		$ 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	Sep. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	$ 139,261	$ 187,055
Less than 12 months, gross unrealized (losses)	(374)	(965)
12 months or longer, fair value	45,859	72,428
12 months or longer, gross unrealized (losses)	(1,114)	(1,090)
Fair value	185,120	259,483
Gross unrealized (losses)	(1,488)	(2,055)
U.S. government and agency obligations
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value		5,106
Less than 12 months, gross unrealized (losses)		(13)
12 months or longer, fair value		4,988
12 months or longer, gross unrealized (losses)		(3)
Fair value		10,094
Gross unrealized (losses)		(16)
Mortgage-backed securities and collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	138,268	178,665
Less than 12 months, gross unrealized (losses)	(367)	(946)
12 months or longer, fair value	36,897	58,208
12 months or longer, gross unrealized (losses)	(76)	(319)
Fair value	175,165	236,873
Gross unrealized (losses)	(443)	(1,265)
Municipal obligations
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value		696
Less than 12 months, gross unrealized (losses)		(1)
12 months or longer, fair value		0
12 months or longer, gross unrealized (losses)		0
Fair value		696
Gross unrealized (losses)		(1)
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	993	2,588
Less than 12 months, gross unrealized (losses)	(7)	(5)
12 months or longer, fair value	4,503	4,627
12 months or longer, gross unrealized (losses)	(498)	(373)
Fair value	5,496	7,215
Gross unrealized (losses)	(505)	(378)
Trust preferred securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	0	0
Less than 12 months, gross unrealized (losses)	0	0
12 months or longer, fair value	4,459	4,605
12 months or longer, gross unrealized (losses)	(540)	(395)
Fair value	4,459	4,605
Gross unrealized (losses)	$ (540)	$ (395)

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Debt Securities Held to Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	$ 272,712	$ 285,756
Gross unrealized gains	15,758	4,074
Gross unrealized (losses)	(31)	(325)
Fair value	288,439	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	4	26
Gross unrealized (losses)	0	(66)
Fair value	5,004	19,960
Mortgage-backed securities and collateralized mortgage obligations
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	267,712	265,756
Gross unrealized gains	15,754	4,048
Gross unrealized (losses)	(31)	(259)
Fair value	$ 283,435	$ 269,545

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Debt Securities Held to Maturity - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) security	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) security	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($) security
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, held-to-maturity, amortized cost, maturity, allocated and single maturity date, after year one through five	$ 5,000,000.0		$ 5,000,000.0
Debt securities, held-to-maturity, fair value, maturity, allocated and single maturity date, after year one through five	5,000,000.0		5,000,000.0
Debt securities, held-to-maturity	272,712,000		272,712,000		$ 285,756,000
Fair value	288,439,000		288,439,000		289,505,000
Proceeds from sale of held-to-maturity securities	0	$ 0	0	$ 0
Proceeds from sale and maturity of held-to-maturity securities	20,000,000.0	23,400,000	20,000,000.0	28,400,000
Debt securities, held-to-maturity, sold, realized gain (loss)	0		0
Debt securities, held-to-maturity, sold, realized		24,000		24,000
Debt securities, held-to-maturity, sold, realized loss		0		0
Fair value of securities sold under agreements to repurchase	$ 235,300,000		$ 235,300,000		$ 236,000,000.0
Number of positions | security	3		3		22
Other-than-temporary impairment loss, held-to-maturity, before tax	$ 0	$ 0	$ 0	$ 0
Mortgage-backed securities and collateralized mortgage obligations
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, held-to-maturity	267,712,000		267,712,000		$ 265,756,000
Fair value	$ 283,435,000		$ 283,435,000		$ 269,545,000

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Debt Securities Held to Maturity - Continuous Unrealized Loss Position on Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, Fair Value		$ 37,845
Less than 12 months, Gross unrealized (losses)		(317)
12 months or longer, Fair value		772
12 months or longer, Gross unrealized (losses)		(8)
Total, Fair value		38,617
Total, Gross unrealized (losses)		(325)
U.S. government and agency obligations
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, Fair Value		9,934
Less than 12 months, Gross unrealized (losses)		(66)
12 months or longer, Fair value		0
12 months or longer, Gross unrealized (losses)		0
Total, Fair value		9,934
Total, Gross unrealized (losses)		(66)
Mortgage-backed securities and collateralized mortgage obligations
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, Fair Value	$ 2,695	27,911
Less than 12 months, Gross unrealized (losses)	(6)	(251)
12 months or longer, Fair value	1,883	772
12 months or longer, Gross unrealized (losses)	(25)	(8)
Total, Fair value	4,578	28,683
Total, Gross unrealized (losses)	$ (31)	$ (259)

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Equity Securities at Fair Value (Details)	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($) security	Mar. 31, 2019	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jun. 30, 2019 USD ($)	Jan. 01, 2019 USD ($)
Debt and Equity Securities, FV-NI [Line Items]
Equity securities	$ 4,706,000			$ 4,706,000				$ 2,855,000
Accounting Standards Update [Extensible List]			us-gaap:AccountingStandardsUpdate201601Member	us-gaap:AccountingStandardsUpdate201613Member		us-gaap:AccountingStandardsUpdate201601Member
Cumulative effect of new accounting principle in period of adoption	1,017,330,000	$ 991,835,000		$ 1,017,330,000	$ 991,835,000	$ 972,060,000	$ 1,040,988,000	982,517,000	$ 1,007,909,000
Change in fair value of equity securities	(4,000)	(59,000)		55,000	189,000
Proceeds from sales of equity securities	0	$ 161,000		0	926,000
Number of equity securities | security		1
Equity securities, realized gain		$ 70,000			196,000
Equity securities, realized loss					0
Retained Earnings
Debt and Equity Securities, FV-NI [Line Items]
Cumulative effect of new accounting principle in period of adoption	652,430,000	601,932,000		652,430,000	601,932,000	560,216,000	637,343,000	615,481,000	587,714,000
Accumulated Other Comprehensive (Loss)
Debt and Equity Securities, FV-NI [Line Items]
Cumulative effect of new accounting principle in period of adoption	$ (87,929,000)	$ (55,972,000)		$ (87,929,000)	$ (55,972,000)	(71,897,000)	$ (53,207,000)	$ (68,735,000)	$ (61,319,000)
Cumulative Effect, Period of Adoption, Adjustment
Debt and Equity Securities, FV-NI [Line Items]
Cumulative effect of new accounting principle in period of adoption						0
Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings
Debt and Equity Securities, FV-NI [Line Items]
Cumulative effect of new accounting principle in period of adoption						548,000				$ 548,000
Cumulative Effect, Period of Adoption, Adjustment | Accumulated Other Comprehensive (Loss)
Debt and Equity Securities, FV-NI [Line Items]
Cumulative effect of new accounting principle in period of adoption						$ (548,000)				$ (548,000)

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Loans Receivable and Allowance for Loan Losses - Loans Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	$ 6,458,807	$ 6,176,329
Net deferred loan costs, fees and purchased premiums and discounts	10,038	21,237
Loans receivable	6,468,845	6,197,566
Real estate loans | One-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	2,053,584	2,077,508
Real estate loans | Multifamily and commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	2,868,641	2,924,851
Real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	307,659	298,942
Commercial business loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	886,423	484,941
Consumer loans | Home equity loans and advances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	340,962	388,127
Consumer loans | Other consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	1,538	1,960
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	6,452,101	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	2,053,293	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	2,863,718	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	307,659	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	884,931	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	340,962	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	1,538	1,960
Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	6,706	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	291	429
Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	4,923	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	1,492	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		9 Months Ended		12 Months Ended
	Sep. 30, 2020 USD ($) loan	Sep. 30, 2019 USD ($) loan	Sep. 30, 2020 USD ($) loan	Sep. 30, 2019 USD ($) loan	Dec. 31, 2019 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held-for-sale	$ 4,100,000		$ 4,100,000		$ 0
Proceeds from sales of loans held-for-sale			111,764,000	$ 94,834,000
Loss on sale of loans held-for-investment			0
Purchases of loans receivable	0		0	29,885,000
Proceeds from sales of loans receivable			28,923,000	$ 10,273,000
Carrying value of servicing liability	602,500,000		$ 602,500,000		$ 526,300,000
Threshold period, past due status of financial receivables			30 days
Threshold period, past due for nonperforming status of financial receivables			90 days		90 days
Non-accrual	10,900,000		$ 10,900,000		$ 6,700,000
Financing receivable, 90 days or more past due, still accruing	0		0		0
Loans receivable	6,468,845,000		6,468,845,000		6,197,566,000
Real estate owned	$ 0		$ 0		$ 0
Mortgage loans in process of foreclosure, number of loans | loan	1		1		4
Mortgage loans in process of foreclosure, amount	$ 180,000		$ 180,000		$ 522,000
Specific allowance for loan losses attributable to impaired loans	1,839,000		1,839,000		1,621,000
Impaired loans for which there are no related allowance for loan losses	26,499,000		26,499,000		10,747,000
Financing receivable, modifications, recorded investment	$ 44,100,000		$ 44,100,000		20,000,000.0
Number of loans | loan	5	0	6	1
Real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sale of loans held-for-investment		$ 5,500,000		$ 5,500,000
Gain on sale of loans held-for-investment		0		0
Purchases of loans receivable				24,900,000
Real estate loans | Home equity loans and advances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sale of loans held-for-investment		2,300,000		4,800,000
Gain on sale of loans held-for-investment		0		0
Real estate loans | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales of loans held-for-sale	$ 7,800,000	49,100,000	$ 111,800,000	94,800,000
Gain on sale of loans held-for-sale	327,000	382,000	1,700,000	710,000
Loss on sale of loans held-for-sale	0	0	0	0
Proceeds from sale of loans held-for-investment			8,800,000
Gain on sale of loans held-for-investment			82,000
Purchases of loans receivable		$ 0		$ 5,000,000.0
Specific allowance for loan losses attributable to impaired loans	406,000		406,000		484,000
Impaired loans for which there are no related allowance for loan losses	$ 2,825,000		2,825,000		4,314,000
Real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans held-for-investment | loan	1
Proceeds from sale of loans held-for-investment	$ 5,800,000		12,500,000
Gain on sale of loans held-for-investment	$ 0		0
Commercial business loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loss on sale of loans held-for-sale			0
Number of loans held-for-investment | loan	1
Proceeds from sale of loans held-for-investment	$ 274,000		7,600,000
Gain on sale of loans held-for-investment	23,000		78,000
Specific allowance for loan losses attributable to impaired loans	871,000		871,000		1,121,000
Impaired loans for which there are no related allowance for loan losses	$ 2,577,000		$ 2,577,000		3,859,000
Number of loans | loan	1	0	2	1
Less Than 90 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	$ 3,900,000		$ 3,900,000		$ 1,500,000
Financial receivable, number of loans in nonaccrual status | loan			22		8
30-59 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, modifications, recorded investment	420,000		$ 420,000		$ 660,000
Number of loans | loan			1		3
60-89 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, modifications, recorded investment	262,000		$ 262,000
Number of loans | loan			1
90 Days or More
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, modifications, recorded investment	910,000		$ 910,000
Number of loans | loan			3		0
Freddie Mac
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales of loans receivable	48,500,000		$ 48,500,000	$ 21,600,000
Gain on sale of loans receivable	1,500,000		1,500,000
Loss on sale of loans receivable	0		0
Proceeds from securitizations of loans held-for-investment		$ 0
Stewardship Financial Corporation | Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	5,900,000		5,900,000		$ 6,900,000
Roselle Entities | Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	179,000		179,000
Paycheck Protection Program | Commercial business loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, before allowance for credit loss	474,900,000		474,900,000		$ 0
Financing receivable, unamortized loan fee	$ 11,200,000		$ 11,200,000

XML

Loans Receivable and Allowance for Loan Losses - Aging of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Non-accrual	$ 10,900	$ 6,700
Total	6,458,807	6,176,329
Real estate loans | One-to-four family
Financing Receivable, Past Due [Line Items]
Total	2,053,584	2,077,508
Real estate loans | Multifamily and commercial
Financing Receivable, Past Due [Line Items]
Total	2,868,641	2,924,851
Real estate loans | Construction
Financing Receivable, Past Due [Line Items]
Total	307,659	298,942
Commercial business loans
Financing Receivable, Past Due [Line Items]
Total	886,423	484,941
Consumer loans | Home equity loans and advances
Financing Receivable, Past Due [Line Items]
Total	340,962	388,127
Consumer loans | Other consumer loans
Financing Receivable, Past Due [Line Items]
Total	1,538	1,960
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Past Due [Line Items]
Total Past Due	22,271	18,478
Non-accrual	10,911	6,687
Current	6,418,919	6,144,143
Total	6,452,101	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	9,548	9,642
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | 60-89 Days
Financing Receivable, Past Due [Line Items]
Total Past Due	5,144	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	7,579	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	6,649	10,019
Non-accrual	2,881	1,732
Current	2,043,763	2,065,328
Total	2,053,293	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	4,347	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	542	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	1,760	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	5,170	2,552
Non-accrual	2,995	716
Current	2,855,553	2,916,717
Total	2,863,718	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	600	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	1,772	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	2,798	716
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction
Financing Receivable, Past Due [Line Items]
Total Past Due	80	0
Non-accrual	0	0
Current	307,579	298,942
Total	307,659	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	80	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	8,251	3,545
Non-accrual	4,536	3,686
Current	872,144	475,984
Total	884,931	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	2,910	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	2,643	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	2,698	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	2,119	2,359
Non-accrual	499	553
Current	338,344	385,215
Total	340,962	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	1,610	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	186	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	323	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	2	3
Non-accrual	0	0
Current	1,536	1,957
Total	1,538	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	1	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	1	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

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Loans Receivable and Allowance for Loan Losses - Accretable Yield For PCI Loans (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	$ 471	$ 511
Acquisition	0	58
Accretion	(58)	(156)
Net change in expected cash flows	1	1
Balance at end of period	$ 414	$ 414

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Loans Receivable and Allowance for Loan Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Allowance for loan losses:
Total	$ 76,133	$ 74,015	$ 61,709	$ 62,629	$ 62,403	$ 62,342
Total loans:
Total	6,458,807		6,176,329
Real estate loans | One-to-four family
Allowance for loan losses:
Total	15,775	16,633	13,780	15,733	15,610	15,232
Total loans:
Total	2,053,584		2,077,508
Real estate loans | Multifamily and commercial
Allowance for loan losses:
Total	30,989	27,330	22,980	22,969	22,679	23,251
Total loans:
Total	2,868,641		2,924,851
Real estate loans | Construction
Allowance for loan losses:
Total	10,534	10,217	7,435	7,760	8,806	7,217
Total loans:
Total	307,659		298,942
Commercial business loans
Allowance for loan losses:
Total	17,502	18,314	15,836	14,028	12,718	14,176
Total loans:
Total	886,423		484,941
Consumer loans | Home equity loans and advances
Allowance for loan losses:
Total	1,326	1,514	1,669	2,131	2,583	2,458
Total loans:
Total	340,962		388,127
Consumer loans | Other consumer loans
Allowance for loan losses:
Total	7	$ 7	9	$ 8	$ 7	$ 8
Total loans:
Total	1,538		1,960
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Allowance for loan losses:
Allowance for loan losses, Individually evaluated for impairment	1,839		1,621
Allowance for loan losses, Collectively evaluated for impairment	74,294		60,088
Total loans:
Total loans, individually evaluated for impairment	45,846		18,811
Total loans, collectively evaluated for impairment	6,406,255		6,150,497
Total	6,452,101		6,169,308
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family
Allowance for loan losses:
Allowance for loan losses, Individually evaluated for impairment	406		484
Allowance for loan losses, Collectively evaluated for impairment	15,369		13,296
Total loans:
Total loans, individually evaluated for impairment	7,230		8,891
Total loans, collectively evaluated for impairment	2,046,063		2,068,188
Total	2,053,293		2,077,079
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial
Allowance for loan losses:
Allowance for loan losses, Individually evaluated for impairment	550		2
Allowance for loan losses, Collectively evaluated for impairment	30,439		22,978
Total loans:
Total loans, individually evaluated for impairment	32,090		2,599
Total loans, collectively evaluated for impairment	2,831,628		2,917,386
Total	2,863,718		2,919,985
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction
Allowance for loan losses:
Allowance for loan losses, Individually evaluated for impairment	0		0
Allowance for loan losses, Collectively evaluated for impairment	10,534		7,435
Total loans:
Total loans, individually evaluated for impairment	0		0
Total loans, collectively evaluated for impairment	307,659		298,942
Total	307,659		298,942
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans
Allowance for loan losses:
Allowance for loan losses, Individually evaluated for impairment	871		1,121
Allowance for loan losses, Collectively evaluated for impairment	16,631		14,715
Total loans:
Total loans, individually evaluated for impairment	4,664		5,178
Total loans, collectively evaluated for impairment	880,267		478,037
Total	884,931		483,215
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances
Allowance for loan losses:
Allowance for loan losses, Individually evaluated for impairment	12		14
Allowance for loan losses, Collectively evaluated for impairment	1,314		1,655
Total loans:
Total loans, individually evaluated for impairment	1,862		2,143
Total loans, collectively evaluated for impairment	339,100		385,984
Total	340,962		388,127
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans
Allowance for loan losses:
Allowance for loan losses, Individually evaluated for impairment	0		0
Allowance for loan losses, Collectively evaluated for impairment	7		9
Total loans:
Total loans, individually evaluated for impairment	0		0
Total loans, collectively evaluated for impairment	1,538		1,960
Total	1,538		1,960
Financial Asset Acquired with Credit Deterioration
Allowance for loan losses:
Total	0		0
Total loans:
Total	6,706		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	291		429
Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial
Allowance for loan losses:
Total	0		0
Total loans:
Total	4,923		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	1,492		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	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) loan	Sep. 30, 2019 USD ($) loan	Sep. 30, 2020 USD ($) loan	Sep. 30, 2019 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
No. of Loans | loan	5	0	6	1
Pre-modification Recorded Investment	$ 17,682	$ 0	$ 27,894	$ 4,095
Post-modification Recorded Investment	$ 17,682	$ 0	$ 29,189	$ 4,095
Real estate loans | Multifamily and commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
No. of Loans | loan	4	0	4	0
Pre-modification Recorded Investment	$ 16,387	$ 0	$ 16,387	$ 0
Post-modification Recorded Investment	$ 16,387	$ 0	$ 16,387	$ 0
Commercial business loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
No. of Loans | loan	1	0	2	1
Pre-modification Recorded Investment	$ 1,295	$ 0	$ 11,507	$ 4,095
Post-modification Recorded Investment	$ 1,295	$ 0	$ 12,802	$ 4,095

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Loans Receivable and Allowance for Loan Losses - Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Allowance for loan losses:
Beginning balance	$ 74,015	$ 62,403	$ 61,709	$ 62,342
Provision for loan losses	2,516	1,157	17,820	1,705
Recoveries	247	35	608	434
Charge-offs	(645)	(966)	(4,004)	(1,852)
Ending balance	76,133	62,629	76,133	62,629
Real estate loans | One-to-four family
Allowance for loan losses:
Beginning balance	16,633	15,610	13,780	15,232
Provision for loan losses	(758)	347	2,292	1,215
Recoveries	87	4	329	29
Charge-offs	(187)	(228)	(626)	(743)
Ending balance	15,775	15,733	15,775	15,733
Real estate loans | Multifamily and commercial
Allowance for loan losses:
Beginning balance	27,330	22,679	22,980	23,251
Provision for loan losses	3,659	290	7,998	(282)
Recoveries	0	0	12	0
Charge-offs	0	0	(1)	0
Ending balance	30,989	22,969	30,989	22,969
Real estate loans | Construction
Allowance for loan losses:
Beginning balance	10,217	8,806	7,435	7,217
Provision for loan losses	317	(1,047)	3,098	541
Recoveries	0	1	1	2
Charge-offs	0	0	0	0
Ending balance	10,534	7,760	10,534	7,760
Commercial business loans
Allowance for loan losses:
Beginning balance	18,314	12,718	15,836	14,176
Provision for loan losses	(573)	2,040	4,685	485
Recoveries	128	8	211	374
Charge-offs	(367)	(738)	(3,230)	(1,007)
Ending balance	17,502	14,028	17,502	14,028
Consumer loans | Home equity loans and advances
Allowance for loan losses:
Beginning balance	1,514	2,583	1,669	2,458
Provision for loan losses	(129)	(474)	(253)	(255)
Recoveries	32	22	55	29
Charge-offs	(91)	0	(145)	(101)
Ending balance	1,326	2,131	1,326	2,131
Consumer loans | Other consumer loans
Allowance for loan losses:
Beginning balance	7	7	9	8
Provision for loan losses	0	1	0	1
Recoveries	0	0	0	0
Charge-offs	0	0	(2)	(1)
Ending balance	$ 7	$ 8	$ 7	$ 8

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Loans Receivable and Allowance for Loan Losses - Loans Individually Evaluated for Impairment (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Impaired [Line Items]
With no allowance recorded: Recorded investment	$ 26,499	$ 10,747
With no allowance recorded: Unpaid principal balance	27,567	12,929
With a specific allowance recorded: Recorded investment	19,347	8,064
With a specific allowance recorded: Unpaid principal balance	23,319	11,088
Recorded Investment	45,846	18,811
Unpaid Principal Balance	50,886	24,017
Specific Allowance	1,839	1,621
Real estate loans | One-to-four family
Financing Receivable, Impaired [Line Items]
With no allowance recorded: Recorded investment	2,825	4,314
With no allowance recorded: Unpaid principal balance	3,616	5,473
With a specific allowance recorded: Recorded investment	4,405	4,577
With a specific allowance recorded: Unpaid principal balance	4,420	4,613
Recorded Investment	7,230	8,891
Unpaid Principal Balance	8,036	10,086
Specific Allowance	406	484
Real estate loans | Multifamily and commercial
Financing Receivable, Impaired [Line Items]
With no allowance recorded: Recorded investment	20,389	1,494
With no allowance recorded: Unpaid principal balance	20,426	2,191
With a specific allowance recorded: Recorded investment	11,701	1,105
With a specific allowance recorded: Unpaid principal balance	12,316	1,105
Recorded Investment	32,090	2,599
Unpaid Principal Balance	32,742	3,296
Specific Allowance	550	2
Commercial business loans
Financing Receivable, Impaired [Line Items]
With no allowance recorded: Recorded investment	2,577	3,859
With no allowance recorded: Unpaid principal balance	2,680	4,048
With a specific allowance recorded: Recorded investment	2,087	1,319
With a specific allowance recorded: Unpaid principal balance	5,429	4,307
Recorded Investment	4,664	5,178
Unpaid Principal Balance	8,109	8,355
Specific Allowance	871	1,121
Consumer loans | Home equity loans and advances
Financing Receivable, Impaired [Line Items]
With no allowance recorded: Recorded investment	708	1,080
With no allowance recorded: Unpaid principal balance	845	1,217
With a specific allowance recorded: Recorded investment	1,154	1,063
With a specific allowance recorded: Unpaid principal balance	1,154	1,063
Recorded Investment	1,862	2,143
Unpaid Principal Balance	1,999	2,280
Specific Allowance	$ 12	$ 14

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Loans Receivable and Allowance for Loan Losses - Interest Income on Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 38,459	$ 22,350	$ 36,308	$ 21,375
Interest Income Recognized	381	261	1,160	841
Real estate loans | One-to-four family
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	8,020	8,773	8,175	9,144
Interest Income Recognized	74	101	226	340
Real estate loans | Multifamily and commercial
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	23,525	2,637	20,670	2,667
Interest Income Recognized	227	37	653	111
Real estate loans | Construction
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	0	850	0	850
Interest Income Recognized	0	0	0	0
Commercial business loans
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	4,979	7,461	5,468	5,848
Interest Income Recognized	52	88	196	268
Consumer loans | Home equity loans and advances
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	1,935	2,629	1,995	2,866
Interest Income Recognized	$ 28	$ 35	$ 85	$ 122

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Loans Receivable and Allowance for Loan Losses - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	$ 6,458,807	$ 6,176,329
Real estate loans | One-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	2,053,584	2,077,508
Real estate loans | Multifamily and commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	2,868,641	2,924,851
Real estate loans | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	307,659	298,942
Commercial business loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	886,423	484,941
Consumer loans | Home equity loans and advances
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	340,962	388,127
Consumer loans | Other consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	1,538	1,960
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	6,452,101	6,169,308
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	6,393,000	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	24,288	25,313
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	34,813	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 | Loss
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	2,053,293	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	2,046,613	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	408	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	6,272	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 | One-to-four family | Loss
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	2,863,718	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	2,828,021	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	15,819	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	19,878	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 | Multifamily and commercial | Loss
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	307,659	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	307,659	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 | Real estate loans | Construction | Loss
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	884,931	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	869,122	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	8,061	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	7,748	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 | Commercial business loans | Loss
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	340,962	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	340,047	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	915	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 | Home equity loans and advances | Loss
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	1,538	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	1,538	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
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans | Loss
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	$ 0	$ 0

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Leases - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Total lease liability	$ 21,008	$ 21,008
Operating lease, weighted average remaining lease term	7 years 7 months 6 days	7 years 7 months 6 days
Operating lease, weighted average discount rate	2.25%	2.25%
Lease, cost	$ 603	$ 1,900
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	5 years	5 years
Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, renewal term	10 years	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	Sep. 30, 2020 USD ($)
Leases [Abstract]
2020	$ 1,037
2021	4,010
2022	3,624
2023	3,310
2024	2,586
Thereafter	8,534
Total undiscounted cash flows	23,101
Discount on cash flows	(2,093)
Total lease liability	$ 21,008

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Deposits - Schedule of Deposits (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Deposits [Abstract]
Non-interest-bearing demand	$ 1,341,248	$ 958,442
Interest-bearing demand	2,033,729	1,720,383
Money market accounts	540,723	410,392
Savings and club deposits	652,970	543,480
Certificates of deposit	2,060,978	2,013,145
Total deposits	$ 6,629,648	$ 5,645,842

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Deposits - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Interest-bearing demand	$ 2,033,729		$ 2,033,729		$ 1,720,383
Aggregate amount of certificates of deposit exceeding threshold amount	1,100,000		1,100,000		1,100,000
Interest expense on deposits	12,826	$ 16,055	44,569	$ 44,984
Stewardship Financial Corporation
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Interest-bearing demand	$ 26,400		$ 26,400		$ 31,600

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Deposits - Schedule of Deposit Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Deposits [Abstract]
One year or less	$ 1,543,088	$ 1,293,613
After one year to two years	390,328	548,995
After two years to three years	55,389	142,458
After three years to four years	24,618	11,362
After four years	47,555	16,717
Total term certificate accounts	$ 2,060,978	$ 2,013,145

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Stock Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended			9 Months Ended
	Dec. 16, 2019	Jul. 23, 2019	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020	Dec. 31, 2019	Jun. 06, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)										7,949,996
Granted (in shares)	184,378	3,589,959					3,707,901
Grants in period (in dollars per share)	$ 4.59	$ 4.25
Granted (in dollars per share)	$ 17.00	$ 15.60					$ 15.60
Exercises in period (in shares)			0		0	0	0
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)										2,271,427
Granted (in shares)	74,673	1,419,131		0			1,389,570
Granted (in dollars per share)	$ 17.00	$ 15.60		$ 0			$ 15.60
Stock based compensation			$ 1,400		$ 1,000	$ 4,200	$ 1,000
Non-vested restricted shares outstanding (in shares)			1,236,074	1,419,131	1,389,570	1,236,074	1,389,570	1,418,891	1,420,012		0
Non-vested restricted shares outstanding, amount			$ 15,500			$ 15,500
Period for recognition (in years)						3 years 3 months 18 days
Restricted Stock | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)		3 years
Restricted Stock | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)		5 years
Employee 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
Stock based compensation			$ 808		$ 601	$ 2,400	$ 601
Non-vested restricted shares outstanding (in shares)			2,999,767			2,999,767
Non-vested restricted shares outstanding, amount			$ 12,100			$ 12,100
Period for recognition (in years)						8 years 9 months 18 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%
Tranche One | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)		1 year
Tranche One | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	1 year	1 year

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Stock Based Compensation - Restricted Stock Activity (Details) - Restricted Stock - $ / shares			3 Months Ended			9 Months Ended
	Dec. 16, 2019	Jul. 23, 2019	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019
Number of Restricted Shares
Beginning balance (in shares)			1,418,891	1,419,131	1,420,012	0
Granted (in shares)	74,673	1,419,131			0	1,389,570
Forfeited (in shares)			(15,390)	(240)	(881)
Vested (in shares)			(167,427)
Ending balance (in shares)			1,236,074	1,418,891	1,419,131	1,389,570
Weighted Average Grant Date Fair Value
Beginning balance (in dollars per share)			$ 15.67	$ 15.67	$ 15.67	$ 0
Granted (in dollars per share)	$ 17.00	$ 15.60			0	15.60
Forfeited (in dollars per share)			16.07	15.60	16.60
Vested (in dollars per share)			15.62
Ending balance (in dollars per share)			$ 15.68	$ 15.67	$ 15.67	$ 15.60

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Stock Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended			9 Months Ended		12 Months Ended
	Dec. 16, 2019	Jul. 23, 2019	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Number of Stock Options
Beginning balance (in shares)			3,771,690	3,774,337	3,784,044	3,784,044	0	0
Forfeited (in shares)			(44,485)	(2,647)	(9,707)
Granted (in shares)	184,378	3,589,959					3,707,901
Ending balance (in shares)			3,727,205	3,771,690	3,774,337	3,727,205	3,707,901	3,784,044
Options exercisable (in shares)			727,438			727,438	0
Weighted Average Exercise Price
Beginning balance (in dollars per share)			$ 15.67	$ 15.67	$ 15.67	$ 15.67	$ 0	$ 0
Forfeited (in dollars per share)			15.95	15.60	15.60
Granted (in dollars per share)	$ 17.00	$ 15.60					15.60
Ending balance (in dollars per share)			15.67	$ 15.67	$ 15.67	15.67	15.60	$ 15.67
Options exercisable (in dollars per share)			$ 15.62			$ 15.62	$ 0
Weighted Average Remaining Contractual Term (in years)
Options outstanding			8 years 9 months 18 days	9 years 1 month 6 days	9 years 3 months 18 days		9 years 9 months 18 days	9 years 7 months 6 days
Options granted							9 years 9 months 18 days
Options exercisable						8 years 8 months 12 days
Aggregate Intrinsic Value
Options outstanding			$ 0	$ 0	$ 0	$ 0	$ 704,501	$ 4,812,490	$ 0
Options granted							$ 704,501

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Components of Net Periodic Benefit Costs (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Retirement Benefits [Abstract]
Years of employment benefits are based upon			5 years
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, employer contribution amount	$ 12,000,000.0		$ 12,000,000.0
Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	2,032,000	$ 1,746,000	5,906,000	$ 4,748,000
Interest cost	1,824,000	2,090,000	5,887,000	6,478,000
Expected return on plan assets	(5,908,000)	(5,802,000)	(17,383,000)	(15,256,000)
Amortization of Prior service cost	0	0	0	0
Amortization of Net loss	1,492,000	770,000	3,054,000	2,300,000
Net periodic (income) benefit cost	(560,000)	(1,196,000)	(2,536,000)	(1,730,000)
RIM Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	67,000	53,000	201,000	159,000
Interest cost	102,000	116,000	306,000	348,000
Expected return on plan assets	0	0	0	0
Amortization of Prior service cost	0	0	0	0
Amortization of Net loss	99,000	61,000	297,000	183,000
Net periodic (income) benefit cost	268,000	230,000	804,000	690,000
Post-retirement Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	99,000	84,000	297,000	252,000
Interest cost	171,000	207,000	513,000	621,000
Expected return on plan assets	0	0	0	0
Amortization of Prior service cost	0	0	0	0
Amortization of Net loss	77,000	37,000	231,000	111,000
Net periodic (income) benefit cost	347,000	328,000	1,041,000	984,000
Split-Dollar Life Insurance
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	120,000	88,000	346,000	264,000
Interest cost	135,000	114,000	384,000	342,000
Expected return on plan assets	0	0	0	0
Amortization of Prior service cost	14,000	14,000	42,000	42,000
Amortization of Net loss	113,000	62,000	339,000	186,000
Net periodic (income) benefit cost	382,000	$ 278,000	1,111,000	$ 834,000
Former Bank President | RIM Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic (income) benefit cost	$ 4,000,000		$ 8,000,000

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Fair Value Measurements - Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale	$ 1,245,300	$ 1,098,336
Equity securities	4,706	2,855
U.S. government and agency obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale	30,668	42,386
Mortgage-backed securities and collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale	1,134,106	979,881
Municipal obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale	1,885	2,284
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale	74,181	69,180
Trust preferred securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale	4,460	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]
Total debt securities available for sale	30,668	42,386
Equity securities	4,379	2,587
Derivative assets		0
Derivative liabilities	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale	1,214,632	1,055,950
Equity securities	327	268
Derivative assets		185
Derivative liabilities	47,873	11,546
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale	0	0
Equity securities	0	0
Derivative assets		0
Derivative liabilities	0	0
Measured on recurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale	1,245,300	1,098,336
Equity securities	4,706	2,855
Derivative assets	22,305	185
Assets	1,272,311	1,101,376
Derivative liabilities	47,873	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]
Total debt securities available for sale	30,668	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]
Total debt securities available for sale	1,134,106	979,881
Measured on recurring basis | Municipal obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale	1,885	2,284
Measured on recurring basis | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale	74,181	69,180
Measured on recurring basis | Trust preferred securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale	4,460	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]
Total debt securities available for sale	30,668	42,386
Equity securities	4,379	2,587
Derivative assets	0	0
Assets	35,047	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]
Total debt securities available for sale	30,668	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]
Total debt securities available for sale	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]
Total debt securities available for sale	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]
Total debt securities available for sale	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]
Total debt securities available for sale	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]
Total debt securities available for sale	1,214,632	1,055,950
Equity securities	327	268
Derivative assets	22,305	185
Assets	1,237,264	1,056,403
Derivative liabilities	47,873	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]
Total debt securities available for sale	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]
Total debt securities available for sale	1,134,106	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]
Total debt securities available for sale	1,885	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]
Total debt securities available for sale	74,181	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]
Total debt securities available for sale	4,460	4,605
Measured on recurring basis | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale	0	0
Equity securities	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]
Total debt securities available for sale	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]
Total debt securities available for sale	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]
Total debt securities available for sale	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]
Total debt securities available for sale	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]
Total debt securities available for sale	$ 0	$ 0

XML

Fair Value Measurements - Narrative (Details)	9 Months Ended
	Sep. 30, 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	Sep. 30, 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 measured for impairment based on the fair value of the underlying collateral	$ 0	$ 0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans measured for impairment based on the fair value of the underlying collateral	0	0
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans measured for impairment based on the fair value of the underlying collateral	6,657,586	6,219,008
Measured on non-recurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans measured for impairment based on the fair value of the underlying collateral	708	1,063
Mortgage servicing rights	774	681
Assets	1,482	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 measured for impairment based on the fair value of the underlying collateral	0	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 measured for impairment based on the fair value of the underlying collateral	0	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 measured for impairment based on the fair value of the underlying collateral	708	1,063
Mortgage servicing rights	774	681
Assets	$ 1,482	$ 1,744

XML

Fair Value Measurements - Qualitative Valuation (Details) $ in Thousands	Sep. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Measured on non-recurring basis
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Mortgage servicing rights	$ 774	$ 681
Loans measured for impairment based on the fair value of the underlying collateral	708	1,063
Significant Unobservable Inputs (Level 3)
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Loans measured for impairment based on the fair value of the underlying collateral	6,657,586	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)
Mortgage servicing rights	774	681
Loans measured for impairment based on the fair value of the underlying collateral	$ 708	$ 1,063
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	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	0
Servicing asset, measurement input	0.1025	0.1175
Significant Unobservable Inputs (Level 3) | Prepayment Speeds and Discounts 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	0.089	0.036
Significant Unobservable Inputs (Level 3) | Prepayment Speeds and Discounts 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	0.277	0.240
Significant Unobservable Inputs (Level 3) | Prepayment Speeds and Discounts 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	0.183	0.127

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Fair Value Measurements - Fair Value on Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financial assets:
Debt securities available for sale, at fair value	$ 1,245,300	$ 1,098,336
Debt securities held to maturity	288,439	289,505
Equity securities	4,706	2,855
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	265,896	75,547
Debt securities available for sale, at fair value	30,668	42,386
Debt securities held to maturity	5,004	19,960
Equity securities	4,379	2,587
Federal Home Loan Bank stock	0	0
Loans receivable, net	0	0
Derivative assets		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	1,214,632	1,055,950
Debt securities held to maturity	283,435	269,545
Equity securities	327	268
Federal Home Loan Bank stock	53,416	69,579
Loans receivable, net	0	0
Derivative assets		185
Financial liabilities:
Deposits	6,649,238	5,654,075
Borrowings	1,027,590	1,411,962
Derivative liabilities	47,873	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	0	0
Federal Home Loan Bank stock	0	0
Loans receivable, net	6,657,586	6,219,008
Derivative assets		0
Financial liabilities:
Deposits	0	0
Borrowings	0	0
Derivative liabilities	0	0
Carrying Value
Financial assets:
Cash and cash equivalents	265,896	75,547
Debt securities available for sale, at fair value	1,245,300	1,098,336
Debt securities held to maturity	272,712	285,756
Equity securities	4,706	2,855
Federal Home Loan Bank stock	53,416	69,579
Loans receivable, net	6,392,712	6,135,857
Derivative assets	22,305	185
Financial liabilities:
Deposits	6,629,648	5,645,842
Borrowings	1,015,210	1,407,022
Derivative liabilities	47,873	11,546
Total Fair Value
Financial assets:
Cash and cash equivalents	265,896	75,547
Debt securities available for sale, at fair value	1,245,300	1,098,336
Debt securities held to maturity	288,439	289,505
Equity securities	4,706	2,855
Federal Home Loan Bank stock	53,416	69,579
Loans receivable, net	6,657,586	6,219,008
Derivative assets		185
Financial liabilities:
Deposits	6,649,238	5,654,075
Borrowings	1,027,590	1,411,962
Derivative liabilities	$ 47,873	$ 11,546

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Other Comprehensive Income (Loss) - Tax Effects of Components in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Before Tax
Other comprehensive income (loss)	$ (43,955)	$ 6,768	$ (24,291)	$ 20,850
Tax Effect
Other comprehensive income (loss)	9,233	(1,421)	5,097	(4,377)
After Tax
Total other comprehensive income (loss)	(34,722)	5,347	(19,194)	16,473
Unrealized Gains on Debt Securities Available for Sale
Before Tax
Other comprehensive income (loss), before reclassifications	(3,688)	6,186	28,736	35,781
Other comprehensive income (loss)	(3,692)	7,444	29,107	37,515
Tax Effect
Other comprehensive income (loss), before reclassifications	775	(1,271)	(6,031)	(7,479)
Other comprehensive income (loss)	775	(1,562)	(6,112)	(7,878)
After Tax
Other comprehensive income (loss), before reclassifications	(2,913)	4,915	22,705	28,302
Total other comprehensive income (loss)	(2,917)	5,882	22,995	29,637
AOCI, Accumulated Gain (Loss), Debt Securities Available-for-sale, Accretion Of Unrealized Gains (Losses), Parent
Before Tax
Reclassification from AOCI, current period	(4)	2	1	13
Tax Effect
Reclassification from AOCI, current period	0	0	0	(3)
After Tax
Reclassification from AOCI, current period	(4)	2	1	10
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Other Reclassifications, Parent
Before Tax
Reclassification from AOCI, current period	0	1,256	370	1,721
Tax Effect
Reclassification from AOCI, current period	0	(291)	(81)	(396)
After Tax
Reclassification from AOCI, current period	0	965	289	1,325
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Before Tax
Other comprehensive income (loss), before reclassifications	2,256	(1,619)	(13,050)	(11,059)
Tax Effect
Other comprehensive income (loss), before reclassifications	(471)	340	2,736	2,324
After Tax
Other comprehensive income (loss), before reclassifications	1,785	(1,279)	(10,314)	(8,735)
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent
Before Tax
Reclassification from AOCI, current period	(14)	(14)	(42)	(42)
Tax Effect
Reclassification from AOCI, current period	3	3	10	9
After Tax
Reclassification from AOCI, current period	(11)	(11)	(32)	(33)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent
Before Tax
Reclassification from AOCI, current period	(1,071)	(930)	(3,213)	(2,779)
Tax Effect
Reclassification from AOCI, current period	225	195	674	583
After Tax
Reclassification from AOCI, current period	(846)	(735)	(2,539)	(2,196)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Before Tax
Other comprehensive income (loss), before reclassifications	(41,434)	1,887	(37,093)	(2,785)
Other comprehensive income (loss)	(42,519)	943	(40,348)	(5,606)
Tax Effect
Other comprehensive income (loss), before reclassifications	8,701	(397)	7,789	585
Other comprehensive income (loss)	8,929	(199)	8,473	1,177
After Tax
Other comprehensive income (loss), before reclassifications	(32,733)	1,490	(29,304)	(2,200)
Total other comprehensive income (loss)	$ (33,590)	$ 744	$ (31,875)	$ (4,429)

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Other Comprehensive Income (Loss) - Changes in Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 1,040,988	$ 1,007,909	$ 982,517	$ 972,060
Current period changes in other comprehensive income (loss)	(34,722)	5,347	(19,194)	16,473
Balance at end of year	1,017,330	991,835	1,017,330	991,835
Accumulated Other Comprehensive (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(53,207)	(61,319)	(68,735)	(71,897)
Current period changes in other comprehensive income (loss)	(34,722)	5,347	(19,194)	16,473
Balance at end of year	(87,929)	(55,972)	(87,929)	(55,972)
Unrealized Gains on Debt Securities Available for Sale
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	35,225	9,981	9,313	(13,226)
Current period changes in other comprehensive income (loss)	(2,917)	5,882	22,995	29,637
Balance at end of year	32,308	15,863	32,308	15,863
Unrealized (Losses) on Swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(20,573)	(9,462)	(8,474)	(2,006)
Current period changes in other comprehensive income (loss)	1,785	(1,279)	(10,314)	(8,735)
Balance at end of year	(18,788)	(10,741)	(18,788)	(10,741)
Employee Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(67,859)	(61,838)	(69,574)	(56,665)
Current period changes in other comprehensive income (loss)	(33,590)	744	(31,875)	(4,429)
Balance at end of year	$ (101,449)	$ (61,094)	(101,449)	(61,094)
Cumulative Effect, Period of Adoption, Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period				0
Cumulative Effect, Period of Adoption, Adjustment | Accumulated Other Comprehensive (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period				(548)
Cumulative Effect, Period of Adoption, Adjustment | Unrealized Gains on Debt Securities Available for Sale
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period				(548)
Cumulative Effect, Period of Adoption, Adjusted Balance
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period				972,060
Cumulative Effect, Period of Adoption, Adjusted Balance | Accumulated Other Comprehensive (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period			(68,735)	(72,445)
Cumulative Effect, Period of Adoption, Adjusted Balance | Unrealized Gains on Debt Securities Available for Sale
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period			9,313	(13,774)
Cumulative Effect, Period of Adoption, Adjusted Balance | Unrealized (Losses) on Swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period			(8,474)	(2,006)
Cumulative Effect, Period of Adoption, Adjusted Balance | Employee Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period			$ (69,574)	$ (56,665)

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Other Comprehensive Income (Loss) - Reclassification out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain on securities transactions	$ 0	$ 1,256	$ 370	$ 1,721
Other non-interest expense	5,848	2,217	14,756	7,927
Income before income tax expense	20,339	19,610	49,056	53,702
Income (tax) benefit	(5,252)	(5,392)	(12,107)	(12,534)
Net of tax	15,087	14,218	36,949	41,168
Accumulated Other Comprehensive Income (Loss) Components
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income before income tax expense	(1,071)	326	(2,843)	(1,058)
Income (tax) benefit	225	(96)	593	187
Net of tax	(846)	230	(2,250)	(871)
Accumulated Other Comprehensive Income (Loss) Components | Reclassification adjustment for gains included in net income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain on securities transactions	0	1,256	370	1,721
Accumulated Other Comprehensive Income (Loss) Components | Reclassification adjustment of actuarial net (loss) included in net income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other non-interest expense	$ (1,071)	$ (930)	$ (3,213)	$ (2,779)

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Derivatives and Hedging Activities - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) swap	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) swap	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($) swap
Derivative [Line Items]
Accrued interest on derivatives, at fair value	$ 1,100,000		$ 1,100,000		$ 344,000
Derivative, net liability position, aggregate fair value	24,500,000		24,500,000
Derivative, collateral, right to reclaim cash	47,100,000		47,100,000
Interest Rate Swap
Derivative [Line Items]
Derivative gain (loss) on derivative, net	(44,000)	$ 75,000	406,000	$ 288,000
Not-designated hedge | Currency forward contract - non-designated hedge
Derivative [Line Items]
Notional amount of derivative	0		0		0
Not-designated hedge | Interest Rate Swap
Derivative [Line Items]
Notional amount of derivative	$ 170,900,000		$ 170,900,000		$ 169,900,000
Number of commercial banking customers | swap	46		46		22
Federal Home Loan Bank Advances | Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Notional amount of derivative	$ 445,000,000.0		$ 445,000,000.0		$ 410,000,000.0
Number of interest rate derivatives held | swap	32		32		29

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Derivatives and Hedging Activities - Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Interest rate swaps | Designated as Hedging Instrument | Other Assets
Derivatives, Fair Value [Line Items]
Derivative assets	$ 22,305	$ 185
Interest rate swaps | Designated as Hedging Instrument | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	47,873	11,546
Reported Value Measurement
Derivatives, Fair Value [Line Items]
Derivative assets	22,305	185
Derivative liabilities	$ 47,873	$ 11,546

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Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Total out-of-scope non-interest income	$ 4,155	$ 6,470	$ 10,469	$ 12,855
Total non-interest income	7,909	10,115	21,308	22,928
Deposit Account, Title Insurance and Other Non-Interest Income
Disaggregation of Revenue [Line Items]
Revenue	3,754	3,645	10,839	10,073
Demand deposit account fees
Disaggregation of Revenue [Line Items]
Revenue	787	1,106	2,706	3,116
Title insurance fees
Disaggregation of Revenue [Line Items]
Revenue	1,218	1,350	3,445	3,490
Other non-interest income
Disaggregation of Revenue [Line Items]
Revenue	$ 1,749	$ 1,189	$ 4,688	$ 3,467