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, 2021

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 4, 2021, there were 106,281,020 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, 2021 (Unaudited) and December 31, 2020	2
	Consolidated Statements of Income for the Three and Nine Months Ended September 30, 2021 and 2020 (Unaudited)	3
	Consolidated Statements of Comprehensive Income (Loss) for the Three and Nine Months Ended September 30, 2021 and 2020 (Unaudited)	4
	Consolidated Statements of Changes in Stockholder's Equity for the Three and Nine Months Ended September 30, 2021 and 2020 (Unaudited)	5
	Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2021 and 2020 (Unaudited)	7
	Notes to Unaudited Consolidated Financial Statements	9
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	52
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	59
Item 4.	Controls and Procedures	63
PART II.	Other Information
	Item 1. Legal Proceedings	64
	Item 1A. Risk Factors	64
	Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	64
	Item 3. Defaults Upon Senior Securities	64
	Item 4. Mine Safety Disclosures	64
	Item 5. Other Information	64
	Item 6. Exhibits	64
	Exhibit Index	65
	SIGNATURES	66

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Consolidated Statements of Financial Condition

(In thousands, except share and per share data)

	September 30,		December 31,
	2021		2020
Assets	(Unaudited)
Cash and due from banks	$	298,359	$	422,787
Short-term investments	129		170
Total cash and cash equivalents	298,488		422,957
Debt securities available for sale, at fair value	1,764,866		1,316,952
Debt securities held to maturity, at amortized cost (fair value of $417,268 and $277,091 at September 30, 2021 and December 31, 2020, respectively)	408,088		262,720
Equity securities, at fair value	2,785		5,418
Federal Home Loan Bank stock	40,891		43,759
Loans held-for-sale, at fair value	—		4,146
Loans receivable	6,084,294		6,181,770
Less: allowance for loan losses	70,326		74,676
Loans receivable, net	6,013,968		6,107,094
Accrued interest receivable	27,857		29,456
Office properties and equipment, net	74,426		75,974
Bank-owned life insurance ("BOLI")	237,294		232,824
Goodwill and intangible assets	85,864		87,384
Other assets	245,593		209,852
Total assets	$	9,200,120	$	8,798,536
Liabilities and Stockholders' Equity
Liabilities:
Deposits	$	7,222,358	$	6,778,624
Borrowings	749,631		799,364
Advance payments by borrowers for taxes and insurance	36,039		32,570
Accrued expenses and other liabilities	161,216		176,691
Total liabilities	8,169,244		7,787,249
Stockholders' equity:
Preferred stock, $0.01 par value. 10,000,000 shares authorized; none issued and outstanding at September 30, 2021 and December 31, 2020	—		—
Common stock, $0.01 par value. 500,000,000 shares authorized; 122,039,731 shares issued and 106,297,899 shares outstanding at September 30, 2021 and 122,037,793 shares issued and 110,939,753 shares outstanding at December 31, 2020	1,220		1,220
Additional paid-in capital	617,548		609,531
Retained earnings	741,799		673,084
Accumulated other comprehensive loss	(48,855)		(69,625)
Treasury stock, at cost; 15,741,832 shares at September 30, 2021 and 11,098,040 shares at December 31, 2020	(242,447)		(163,015)
Common stock held by the Employee Stock Ownership Plan	(37,597)		(39,293)
Stock held by Rabbi Trust	(2,299)		(1,875)
Deferred compensation obligations	1,507		1,260
Total stockholders' equity	1,030,876		1,011,287
Total liabilities and stockholders' equity	$	9,200,120	$	8,798,536
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,
	2021		2020		2021		2020
Interest income:	(Unaudited)
Loans receivable	$	55,451	$	63,258	$	171,902	$	192,511
Debt securities available for sale and equity securities	7,622		7,034		21,521		21,654
Debt securities held to maturity	2,353		1,749		6,256		5,807
Federal funds and interest earning deposits	167		71		310		287
Federal Home Loan Bank stock dividends	460		821		1,582		2,951
Total interest income	66,053		72,933		201,571		223,210
Interest expense:
Deposits	6,673		12,826		23,403		44,569
Borrowings	2,028		3,783		5,996		15,744
Total interest expense	8,701		16,609		29,399		60,313
Net interest income	57,352		56,324		172,172		162,897
Provision for (reversal of) loan losses	480		2,516		(2,561)		17,820
Net interest income after provision for (reversal of) loan losses	56,872		53,808		174,733		145,077
Non-interest income:
Demand deposit account fees	986		787		2,682		2,706
Bank-owned life insurance	1,504		1,531		4,475		4,467
Title insurance fees	1,431		1,218		4,554		3,445
Loan fees and service charges	844		565		2,209		1,826
Gain on securities transactions	2,296		—		2,015		370
Change in fair value of equity securities	(443)		(4)		(1,809)		55
Gain on sale of loans	140		1,873		10,814		3,422
Other non-interest income	2,116		1,939		6,920		5,017
Total non-interest income	8,874		7,909		31,860		21,308
Non-interest expense:
Compensation and employee benefits	24,512		26,666		71,506		76,349
Occupancy	4,846		4,823		14,912		14,319
Federal deposit insurance premiums	604		614		1,751		1,350
Advertising	662		484		1,860		2,075
Professional fees	1,766		1,680		5,207		4,129
Data processing and software expenses	2,798		2,825		8,181		7,419
Merger-related expenses	55		424		130		1,931
Loss on extinguishment of debt	—		—		742		—
Other non-interest expense	1,809		3,862		8,076		9,757
Total non-interest expense	37,052		41,378		112,365		117,329
Income before income tax expense	28,694		20,339		94,228		49,056
Income tax expense	7,712		5,252		25,513		12,107
Net income	$	20,982	$	15,087	$	68,715	$	36,949
Earnings per share - basic and diluted	$	0.20	$	0.14	$	0.66	$	0.34
Weighted average shares outstanding -basic and diluted	102,977,254		110,983,871		104,486,520		110,177,736
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,
	2021		2020		2021		2020
	(Unaudited)
Net income	$	20,982	$	15,087	$	68,715	$	36,949
Other comprehensive gain (loss) income, net of tax:
Unrealized (loss) on debt securities available for sale	(9,943)		(2,913)		(22,189)		22,705
Accretion of unrealized (loss) on debt securities reclassified as held to maturity	(2)		(4)		—		1
Reclassification adjustment for gain included in net income	1,791		—		1,589		289
	(8,154)		(2,917)		(20,600)		22,995
Derivatives, net of tax:
Unrealized gain (loss) on swap contracts accounted for as cash flow hedges	1,467		1,785		8,098		(10,314)
	1,467		1,785		8,098		(10,314)
Employee benefit plans, net of tax:
Amortization of prior service cost included in net income	(10)		(11)		(31)		(32)
Reclassification adjustment of actuarial net (loss) included in net income	(1,089)		(846)		(3,267)		(2,539)
Change in funded status of retirement obligations	2,198		(32,733)		36,570		(29,304)
	1,099		(33,590)		33,272		(31,875)
Total other comprehensive (loss) income	(5,588)		(34,722)		20,770		(19,194)
Total comprehensive income (loss), net of tax	$	15,394	$	(19,635)	$	89,485	$	17,755
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, 2021 and 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 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
Balance at June 30, 2021	$	1,220	$	614,381	$	720,817	$	(43,267)	$	(221,072)	$	(38,169)	$	(2,205)	$	1,341	$	1,033,046
Net income	—		—		20,982		—		—		—		—		—		20,982
Other comprehensive income	—		—		—		(5,588)		—		—		—		—		(5,588)
Stock based compensation	—		2,203		—		—		—		—		—		—		2,203
Purchase of treasury stock (1,163,500 shares)	—		—		—		—		(20,544)		—		—		—		(20,544)
Exercise of stock options	—		(26)		—		—		—		—		—		—		(26)
Restricted stock forfeitures (29,882 shares)	—		539		—		—		(539)		—		—		—		—
Repurchase shares for taxes (16,599 shares)	—		—		—		—		(292)		—		—		—		(292)
Employee Stock Ownership Plan shares committed to be released	—		451		—		—		—		572		—		—		1,023
Funding of deferred compensation obligations	—		—		—		—		—		—		(94)		166		72
Balance at September 30, 2021	$	1,220	$	617,548	$	741,799	$	(48,855)	$	(242,447)	$	(37,597)	$	(2,299)	$	1,507	$	1,030,876
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, 2021 and 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

Balance at December 31, 2020	$	1,220	$	609,531	$	673,084	$	(69,625)	$	(163,015)	$	(39,293)	$	(1,875)	$	1,260	$	1,011,287
Net income	—		—		68,715		—		—		—		—		—		68,715
Other comprehensive income	—		—		—		20,770		—		—		—		—		20,770
Treasury stock allocated to restricted stock award grants	—		(733)		—		—		733		—		—		—		—
Stock based compensation	—		6,743		—		—		—		—		—		—		6,743
Purchase of treasury stock (4,633,540 shares)	—		—		—		—		(79,090)		—		—		—		(79,090)
Exercise of stock options	—		(25)		—		—		—		—		—		—		(25)
Restricted stock forfeitures (43,856 shares)	—		783		—		—		(783)		—		—		—		—
Repurchase shares for taxes (16,599 shares)	—		—		—		—		(292)		—		—		—		(292)
Employee Stock Ownership Plan shares committed to be released	—		1,249		—		—		—		1,696		—		—		2,945
Funding of deferred compensation obligations	—		—		—		—		—		—		(424)		247		(177)
Balance at September 30, 2021	$	1,220	$	617,548	$	741,799	$	(48,855)	$	(242,447)	$	(37,597)	$	(2,299)	$	1,507	$	1,030,876

6

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Consolidated Statements of Cash Flows

	Nine Months Ended September 30,
	2021		2020
	(In thousands, unaudited)
Cash flows from operating activities:
Net income	$	68,715	$	36,949
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Amortization of deferred loan costs, fees and purchased premiums and discounts	16		818
Net amortization of premiums and discounts on securities	3,497		1,573
Net amortization of mortgage servicing rights	200		85
Amortization of intangible assets	774		783
Depreciation and amortization of office properties and equipment	5,019		4,947
Amortization of operating lease right-of-use assets	2,720		2,641
Loss on extinguishment of debt	742		—
(Reversal of) provision for loan losses	(2,561)		17,820
Gain on securities transactions	(2,015)		(370)
Change in fair value of equity securities	1,809		(55)
Gain on securitizations	(2,259)		(1,523)
Gain on sale of loans	(8,555)		(1,899)
Loss on disposal of office properties and equipment	61		691
Loss on write-down of mortgage servicing rights	—		75
Deferred tax expense (benefit)	10,515		(3,864)
Decrease (increase) in accrued interest receivable	1,599		(8,481)
(Increase) in other assets	(12,891)		(80,110)
(Increase) decrease in accrued expenses and other liabilities	(4,941)		33,687
Income on bank-owned life insurance	(4,475)		(4,467)
Employee stock ownership plan expense	2,945		2,374
Stock based compensation	6,743		6,585
Increase in deferred compensation obligations under Rabbi Trust	(177)		(129)
Net cash provided by operating activities	67,481		8,130
Cash flows from investing activities:
Proceeds from sales of debt securities available for sale	27,249		20,761
Proceeds from sales of equity securities	1,260		—
Proceeds from paydowns/maturities/calls of debt securities available for sale	257,347		162,161
Proceeds from paydowns/maturities/calls of debt securities held to maturity	29,616		30,988
Purchases of debt securities available for sale	(659,015)		(201,504)
Purchases of debt securities held to maturity	(175,491)		(5,000)
Purchases of equity securities	(91)		—
Proceeds from sales of loans held-for-sale	293,005		111,764
Proceeds from sales of loans receivable	—		28,923
Purchases of loans receivable	(74,232)		—
Net increase in loans receivable	(208,260)		(294,040)
Proceeds from bank-owned life insurance death benefits	5		—
Proceeds from redemptions of Federal Home Loan Bank stock	7,661		40,717
Purchases of Federal Home Loan Bank stock	(4,793)		(22,544)
Proceeds from sales of office properties and equipment	685		—
Additions to office properties and equipment	(4,217)		(3,750)
Net cash acquired in acquisition	—		155,248
Net cash (used in) provided by investing activities	$	(509,271)	$	23,724

7

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Consolidated Statements of Cash Flows (continued)

	Nine Months Ended September 30,
	2021		2020
	( In thousands, unaudited)
Cash flows from financing activities:
Net increase in deposits	$	443,734	$	650,572
Proceeds from long-term borrowings	37,120		90,000
Payments on long-term borrowings	(54,168)		(181,345)
Net decrease in short-term borrowings	(33,427)		(321,595)
Payment of subordinated debt	—		(16,600)
Increase in advance payments by borrowers for taxes and insurance	3,469		(2,235)
Exercise of stock options	(25)		—
Purchase of treasury stock	(79,090)		(60,286)
Repurchase of shares for taxes	(292)		—
Restricted stock forfeitures	—		(16)
Net cash provided by financing activities	$	317,321	$	158,495
Net (decrease) increase in cash and cash equivalents	$	(124,469)	$	190,349
Cash and cash equivalents at beginning of year	422,957		75,547
Cash and cash equivalents at end of period	$	298,488	$	265,896
Cash paid during the period for:
Interest on deposits and borrowings	$	29,544	$	60,772
Income tax payments, net of refunds	$	13,203	$	12,249
Non-cash investing and financing activities:
Transfer of loans receivable to loans held-for-sale	$	280,304	$	114,171
Securitization of loans	99,603		48,526
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 assumed	$	—	$	(110,527)
Net cash and cash equivalents acquired in acquisition	$	—	$	155,248
See accompanying notes to unaudited consolidated financial statements.

8

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, 2021 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, 2020 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. The aggregate merger consideration paid was $136.3 million. 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. During the nine months ended September 30, 2021, the Bank recorded additional losses of $301,000 related to these branches. A credit of $14,000 related to one of these branches was recorded for the three months ended September 30, 2021.

    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. There were no merger expenses recorded for the three and nine months ended September 30, 2021.

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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 Columbia Financial as the surviving entity; and Roselle Bank merged with and into the Bank, with the Bank as the surviving institution. Under the terms of the merger agreement, depositors of Roselle Bank became depositors of the Bank and have the same rights and privileges in the MHC as if their accounts had been established at the Bank on the date established at Roselle Bank. The Company issued 4,759,048 shares of its common stock to the MHC, representing an amount equal to the fair value of the Roselle Entities as determined by an independent appraiser, at the effective time of the merger.

Merger-related expenses are recorded in the Consolidated Statements of Income and are expensed as incurred. Direct acquisition and other charges incurred in connection with the Roselle acquisition totaled $175,000 and $618,000 during the three and nine months ended September 30, 2020. There were no merger expenses recorded for the three and nine months ended September 30, 2021.

    The following table sets forth assets acquired and liabilities assumed in the Roselle acquisition, 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)

Roselle Bank (continued)

    The assets acquired and liabilities assumed have been accounted for under the acquisition method of accounting. The assets and liabilities were recorded at their fair values as of April 1, 2020, and resulted in the recognition of goodwill of $23.8 million. The determination of the fair value of assets acquired and liabilities assumed required management to make estimates about discount rates, future expected cash flows, market condition, and other future events that are highly subjective in nature and subject to change. During the fourth quarter of 2020, the Company completed all tax returns related to the operation of the acquired entity and its impact on the Company's income taxes, which resulted in a $5.1 million adjustment to deferred income taxes, net, and a decrease in goodwill. During the quarter ended March 31, 2021, the Company recorded a final adjustment of $1.1 million to deferred income taxes, net, and a decrease in goodwill. At September 30, 2021, goodwill related to the Roselle acquisition totaled $17.6 million.

Freehold Bank

As previously disclosed, on June 17, 2021, the MHC, Columbia Financial, Inc. and the Bank (collectively, “Columbia”), entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Freehold MHC, Freehold Bancorp and Freehold Bank (collectively, “Freehold”), pursuant to which Columbia will acquire Freehold, with Freehold MHC and Freehold Bancorp merging into the MHC and Columbia Financial, respectively. At the effective time of these mergers, Freehold Bank will convert to a federal savings bank and operate as a wholly-owned subsidiary of Columbia Financial. As a subsidiary of Columbia Financial, current depositors of Freehold Bank will become members of, and will have the same rights and privileges in the MHC, the mutual holding company parent of Columbia Bank, as if their accounts had been established in Columbia Bank on the date established at Freehold. As part of the transaction, Columbia Financial will issue additional shares of its common stock to the MHC in an amount equal to the fair value of Freehold as determined by an independent appraiser. These shares are expected to be issued immediately prior to completion of the mergers. The Merger Agreement has been unanimously approved by the Boards of Directors of each of Columbia Financial, the MHC and the Bank and the Boards of Directors of each of Freehold MHC, Freehold Bancorp and Freehold Bank. Subject to the receipt of all required regulatory and other approvals, and the satisfaction or waiver of other customary closing conditions, the parties anticipate that the transactions contemplated by the Merger Agreement is anticipated to close in the fourth quarter of 2021.

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 pending Freehold acquisition totaled $55,000 and $130,000 during the three and nine months ended September 30, 2021. There were no merger expenses recorded for the three and nine months ended September 30, 2020.

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, 2021 and 2020:

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

3.        Earnings per Share (continued)

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2021		2020		2021		2020
	(Dollars in thousands, except per share data)
Net income	$	20,982	$	15,087	$	68,715	$	36,949
Shares:
Weighted average shares outstanding - basic	102,977,254		110,983,871		104,486,520		110,177,736
Weighted average dilutive shares outstanding	—		—		—		—
Weighted average shares outstanding - diluted	102,977,254		110,983,871		104,486,520		110,177,736
Earnings per share:
Basic	$	0.20	$	0.14	$	0.66	$	0.34
Diluted	$	0.20	$	0.14	$	0.66	$	0.34

    During the three and nine months ended September 30, 2021, the average number of stock options which could potentially dilute basic earnings per share in the future that were not included in the computation of diluted earnings per share because to do so would have been anti-dilutive totaled 3,731,901 and 3,741,138, respectively. During the three and nine months ended September 30, 2020, the average number of stock options which could potentially dilute basic earnings per share in the future that were not included in the computation of diluted earnings per share because to do so would have been anti-dilutive totaled 3,771,082 and 3,769,793, 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 the Board of Directors had expanded its stock repurchase program to authorize the purchase of an additional 3,000,000 shares of the Company's outstanding common stock in addition to the shares remaining under the repurchase program announced on June 11, 2019. On April 23, 2020, the Company completed the repurchases under these stock repurchase programs.

On September 10, 2020, the Company announced that its Board of Directors authorized the Company's second stock repurchase program for the purchase of up to 5,000,000 shares, or approximately 4.3%, of the Company's issued and outstanding common stock, commencing on September 15, 2020. On February 5, 2021, the Company completed the repurchases under the second stock repurchase program. On February 1, 2021, the Company announced that its Board of Directors authorized the Company's third stock repurchase program to acquire up to 5,000,000 shares, or approximately 4.5%, of the Company's then issued and outstanding common stock, commencing upon completion of the Company's second stock repurchase program.

     During the three and nine months ended September 30, 2021, the Company repurchased 1,163,500 shares at a cost of approximately $20.5 million, or $17.66 per share, and 4,633,540 shares, at a cost of approximately $79.1 million, or $17.07 per share, respectively, under these programs. 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. Repurchased shares are held as treasury stock and are available for general corporate purposes.

5.    Summary of Significant Accounting Policies

Accounting Pronouncement Adopted in 2021

    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

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

5.    Summary of Significant Accounting Policies

Accounting Pronouncement Adopted in 2021 (continued)

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 Company adopted this ASU effective January 1, 2021. The update will be applied on a retrospective basis to disclosures with regard to employee benefit plans. The adoption of this update did not have a significant impact on the Company's consolidated financial statements.

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

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

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

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

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

    Based on several analyses performed, as well as an implementation analysis utilizing existing exposures and forecasts of macroeconomic conditions at September 30, 2021, we currently expect the adoption of ASU 2016-13 will result in a decrease between 15% and 25% in our allowance for loan losses and our reserves for unfunded commitments.

    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 decrease 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

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

5.    Summary of Significant Accounting Policies

Accounting Pronouncements Not Yet Adopted (continued)

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 as of January 1, 2022, currently the allowance for loan losses, will be reflected as an adjustment, net of tax, to retained earnings.

6.    Debt Securities Available for Sale

    Debt securities available for sale at September 30, 2021 and December 31, 2020 are summarized as follows:

	September 30, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
			(In thousands)
U.S. government and agency obligations	$	38,651	$	749	$	(97)	$	39,303
Mortgage-backed securities and collateralized mortgage obligations	1,638,630		21,077		(9,095)		1,650,612
Municipal obligations	10,190		20		—		10,210
Corporate debt securities	62,743		2,227		(229)		64,741
	$	1,750,214	$	24,073	$	(9,421)	$	1,764,866

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

    The amortized cost and fair value of debt securities available for sale at September 30, 2021, by contractual final maturity, is shown below. Expected maturities may differ from contractual maturities due to prepayment or early call options exercised by the issuer.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

6.    Debt Securities Available for Sale (continued)

	September 30, 2021
	Amortized Cost		Fair Value
	(In thousands)
One year or less	$	6,944	$	6,944
More than one year to five years	68,415		70,837
More than five years to ten years	36,225		36,473
	$	111,584	$	114,254
Mortgage-backed securities and collateralized mortgage obligations	1,638,630		1,650,612
	$	1,750,214	$	1,764,866

    Mortgage-backed securities and collateralized mortgage obligations totaling $1.6 billion at amortized cost, and $1.7 billion at fair value, are not classified by maturity in the table above as their expected lives are likely to be shorter than the contractual maturity date due to principal prepayments.

    During the three months ended September 30, 2021, the sales of debt securities available for sale totaled $22.5 million, resulting in a gross gains of $2.0 million and no gross losses. Proceeds from called debt securities available for sale totaled $9.0 million, resulting in no gross gains or losses. No debt securities available for sale matured during the quarter.

During the nine months ended September 30, 2021, the sale of debt securities available for sale totaled $27.2 million, resulting in a gross gains of $2.0 million and gross losses of $281,000. Proceeds from called debt securities available for sale totaled $14.0 million, resulting in no gross gains or losses. Proceeds from matured debt securities available for sale totaled $210,000.

    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, the sale of debt securities available for sale totaled $20.8 million, resulting in gross gains of $369,000. Proceeds from called debt securities available for sale totaled $6.6 million, resulting in $1,000 of gross gains. Proceeds from matured debt securities available for sale totaled $5.8 million.

Debt securities available for sale having a carrying value of $567.8 million and $822.2 million, at September 30, 2021 and December 31, 2020, 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, 2021 and December 31, 2020 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

6.    Debt Securities Available for Sale (continued)    

	September 30, 2021
	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	$	9,804	$	(97)	$	—	$	—	$	9,804	$	(97)
Mortgage-backed securities and collateralized mortgage obligations	694,865		(8,178)		61,308		(917)		756,173		(9,095)
Corporate debt securities	4,996		(4)		4,775		(225)		9,771		(229)
	$	709,665	$	(8,279)	$	66,083	$	(1,142)	$	775,748	$	(9,421)

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

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, 2021, 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, 2021 totaled 83, compared with 40 at December 31, 2020. All temporarily impaired securities were investment grade as of September 30, 2021 and December 31, 2020.

    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, 2021 and 2020.

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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, 2021 and December 31, 2020 are summarized as follows:

	September 30, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
	(In thousands)
U.S. government and agency obligations	$	44,870	$	—	$	(489)	$	44,381
Mortgage-backed securities and collateralized mortgage obligations	363,218		10,088		(419)		372,887
	$	408,088	$	10,088	$	(908)	$	417,268

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

The amortized cost and fair value of debt securities held to maturity at September 30, 2021, 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, 2021
	Amortized Cost		Fair Value
	(In thousands)
More than one year to five years	$	14,875	$	14,857
More than five years to ten years	19,995		19,685
More than ten years	10,000		9,839
	44,870		44,381
Mortgage-backed securities and collateralized mortgage obligations	363,218		372,887
	$	408,088	$	417,268

Mortgage-backed securities and collateralized mortgage obligations totaling $363.2 million at amortized cost, and $372.9 million at fair value at September 30, 2021, 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, 2021, there were no sales or maturities of debt securities held to maturity. During the nine months ended September 30, 2021, proceeds from called debt securities held to maturity totaled $5.1 million, resulting in no gross gains or losses.

    During the three and nine months ended September 30, 2020, there were no sales or maturities of debt securities held to maturity. During the three and nine months ended September 30, 2020, proceeds from called debt securities held to maturity totaled $20.0 million, resulting in no gross gains or losses.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

7.    Debt Securities Held to Maturity (continued)

Debt securities held to maturity having a carrying value of $256.9 million and $220.5 million, at September 30, 2021 and December 31, 2020, 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, 2021 and December 31, 2020 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	September 30, 2021
	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	$	44,381	$	(489)	$	—	$	—	$	44,381	$	(489)
Mortgage-backed securities and collateralized mortgage obligations	18,804		(419)		—		—		18,804		(419)
	$	63,185	$	(908)	$	—	$	—	$	63,185	$	(908)

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

    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, 2021, 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, 2021 totaled ten, compared with two at December 31, 2020. All temporarily impaired securities were investment grade as of September 30, 2021 and December 31, 2020.

    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, 2021 and 2020.

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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 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, 2021 and December 31, 2020 was $2.8 million and $5.4 million, respectively.

    The Company recorded a net (decrease) in the fair value of equity securities of $(443,000) and $(1.8) million, during the three and nine months ended September 30, 2021, respectively, as a component of non-interest income. During the three and nine months ended September 30, 2020, the Company recorded a net (decrease) increase in the fair value of equity securities of $(4,000) and $55,000, respectively, as a component of non-interest income.

    During the three and nine months ended September 30, 2021, sales of equity securities totaled $1.3 million, resulting in gross gains of $344,000 and no gross losses. During the three and nine months ended September 30, 2020, there were no sales of equity securities.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

9.    Loans Receivable and Allowance for Loan Losses

    Loans receivable at September 30, 2021 and December 31, 2020 are summarized as follows:

	September 30,		December 31,
	2021		2020
	(In thousands)
Real estate loans:
One-to-four family	$	1,933,876	$	1,940,327
Multifamily and commercial	3,137,461		2,817,965
Construction	272,004		328,711
Commercial business loans	450,021		752,870
Consumer loans:
Home equity loans and advances	264,111		321,177
Other consumer loans	1,772		1,497
Total gross loans	6,059,245		6,162,547
Purchased credit-impaired ("PCI") loans	2,994		6,345
Net deferred loan costs, fees and purchased premiums and discounts	22,055		12,878
Loans receivable	$	6,084,294	$	6,181,770

    The Company had no loans held-for-sale at September 30, 2021. The Company had $4.1 million of SBA loans held-for-sale at December 31, 2020. During the three months ended September 30, 2021, the Company sold $1.8 million, $15.0 million, and $1.2 million of one-to-four family real estate loans and home equity loans, multifamily and commercial real estate loans, and SBA loans held-for-sale included in commercial business loans, respectively, resulting in gross gains of $140,000 and no gross losses. During the nine months ended September 30, 2021, the Company sold $17.4 million, $19.1 million, $250.1 million, and $6.4 million of one-to-four family real estate loans and home equity loans, multifamily and commercial real estate loans, commercial business and SBA loans, and construction loans held-for-sale, respectively, resulting in gross gains of $8.6 million and no gross losses.

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 and nine months ended September 30, 2021, no loans included in loans receivable were sold by the Company. During the three months ended September 30, 2020, the Company sold a construction loan totaling $5.8 million included in loans receivable, resulting in no gross gain or loss. During the three months ended September 30, 2020, the Company sold an SBA 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, $12.5 million, and $7.6 million of one-to-four family real estate and home equity loans, construction loans, and commercial business and SBA loans, respectively, included in loans receivable, resulting in gross gains of $82,000, $0, and $78,000, respectively, and no gross losses.

    During the three months ended September 30, 2021, the Company purchased $678,000 of one-to-four family real estate loans and $2.0 million of multifamily and commercial real estate loans from third parties. During the nine months ended September 30, 2021, the Company purchased $678,000 of one-to-four family real estate loans and $73.6 million of multifamily and commercial real estate loans from third parties. During the three and nine months ended September 30, 2020, no loans were purchased by the Company.

At September 30, 2021 and December 31, 2020, commercial business loans included $69.2 million and $344.4 million, respectively, in SBA Payroll Protection Program ("PPP") loans and net deferred fees related to these loans totaling $1.9 million and $6.6 million, respectively.

20

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 months ended September 30, 2021, no loans were exchanged for Freddie Mac mortgage participation certificates. During the nine months ended September 30, 2021, the Company exchanged $99.6 million of loans for Freddie Mac mortgage participation certificates, resulting in gross gains of $2.3 million and no gross losses. During the three and nine months ended September 30, 2020, $48.5 million of loans were exchanged for Freddie Mac mortgage participation certificates, resulting in gross gains of $1.5 million and no gross losses. The Company retained the servicing of these loans.

At September 30, 2021 and December 31, 2020, the carrying value of loans serviced by the Company for investors was $551.1 million and $598.0 million, respectively. These loans are not included in the Consolidated Statements of Financial Condition.

    The following tables summarize the aging of loans receivable by portfolio segment, including non-accrual loans and excluding PCI loans at September 30, 2021 and December 31, 2020:

	September 30, 2021
	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	$	1,274	$	1,370	$	968	$	3,612	$	1,991	$	1,930,264	$	1,933,876
Multifamily and commercial	486		1,740		2,433		4,659		2,433		3,132,802		3,137,461
Construction	107		—		—		107		—		271,897		272,004
Commercial business loans	225		400		493		1,118		523		448,903		450,021
Consumer loans:
Home equity loans and advances	174		125		59		358		319		263,753		264,111
Other consumer loans	—		—		—		—		—		1,772		1,772
Total loans	$	2,266	$	3,635	$	3,953	$	9,854	$	5,266	$	6,049,391	$	6,059,245

	December 31, 2020
	30-59 Days		60-89 Days		90 Days or More		Total Past Due		Non-accrual		Current		Total
	(In thousands)
Real estate loans:
One-to-four family	$	3,068	$	912	$	1,901	$	5,881	$	2,637	$	1,934,446	$	1,940,327
Multifamily and commercial	15,645		—		1,238		16,883		1,873		2,801,082		2,817,965
Construction	550		—		—		550		—		328,161		328,711
Commercial business loans	2,343		1,056		2,453		5,852		2,968		747,018		752,870
Consumer loans:
Home equity loans and advances	1,156		696		394		2,246		678		318,931		321,177
Other consumer loans	4		—		—		4		—		1,493		1,497
Total loans	$	22,766	$	2,664	$	5,986	$	31,416	$	8,156	$	6,131,131	$	6,162,547

21

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

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

    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, 2021 and December 31, 2020, non-accrual loans totaled $5.3 million and $8.2 million, respectively. Included in non-accrual loans at September 30, 2021, are thirteen loans totaling $1.3 million which are less than 90 days in arrears. At December 31, 2020, 19 loans totaling $2.2 million were less than 90 days in arrears.

    At September 30, 2021 and December 31, 2020, there were no loans past due 90 days or more still accruing interest other than COVID-19 related loan forbearance and deferrals. In accordance with the CARES Act, these loans are not included in the aging of loans receivable by portfolio segment in the table above, and the Bank continues to accrue interest income during the forbearance or deferral period. If adverse information indicating that the borrower's capability of repaying all amounts due is unlikely, the interest accrual will cease.

PCI loans are loans acquired at a discount primarily due to deteriorated credit quality. These loans are initially recorded at fair value at 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 $2.8 million at September 30, 2021 and $6.1 million at December 31, 2020. PCI loans acquired in the Roselle acquisition totaled $184,000 at September 30, 2021 and $246,000 at December 31, 2020.

    The following table presents changes in accretable yield for PCI loans for the three and nine months ended September 30, 2021 and 2020.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Balance at beginning of period	$	375	$	471	$	418	$	511
Acquisition	—		—		—		58
Accretion	(27)		(58)		(91)		(156)
Net change in expected cash flows	4		1		25		1
Balance at end of period	$	352	$	414	$	352	$	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, 2021 and December 31, 2020, the Company had no real estate owned. At September 30, 2021 we had one residential mortgage loan with a carrying value of $86,000 collateralized by residential real estate which was in the process of foreclosure. At December 31, 2020 we had two residential mortgage loans with carrying values totaling $398,000 collateralized by residential real estate which were in the process of foreclosure. In March 2020, the Company temporarily suspended residential property foreclosure sales and evictions in the primary states in which we lend, as the federal government and various states issued executive orders which declared moratoriums on removing individuals from a residential property until at least two months after the COVID-19 health crisis ended. Many of these moratoriums expired in the second and third quarters of 2021. In New Jersey and New York the moratoriums will expire on November 15, 2021 and January 15, 2022, respectively.

22

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, 2021 and December 31, 2020:

	September 30, 2021
	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	$	264	$	96	$	—	$	14	$	5	$	—	$	379
Collectively evaluated for impairment	14,524		26,137		9,482		18,711		1,087		6		69,947
Loans acquired with deteriorated credit quality	—		—		—		—		—		—		—
Total	$	14,788	$	26,233	$	9,482	$	18,725	$	1,092	$	6	$	70,326
Total loans:
Individually evaluated for impairment	$	5,471	$	18,210	$	—	$	2,089	$	727	$	—	$	26,497
Collectively evaluated for impairment	1,928,405		3,119,251		272,004		447,932		263,384		1,772		6,032,748
Loans acquired with deteriorated credit quality	233		1,779		—		982		—		—		2,994
Total loans	$	1,934,109	$	3,139,240	$	272,004	$	451,003	$	264,111	$	1,772	$	6,062,239

23

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

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

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

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

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

    The following tables present the number of loans modified as TDRs during the three and nine months ended September 30, 2021 and 2020, 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.

24

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

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

	For the Three Months Ended September 30,
	2021					2020
	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:
One-to-four family	1	$	64	$	66	—	$	—	$	—
Multifamily and commercial	—	—		—		4	16,387		16,387
Commercial business loans	—	—		—		1	1,295		1,295
Total restructured loans	1	$	64	$	66	5	$	17,682	$	17,682

	For the Nine Months Ended September 30,
	2021					2020
	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:
One-to-four family	2	$	285	$	388	—	$	—	$	—
Multifamily and commercial	1	192		211		4	16,387		16,387
Commercial business loans	—	—		—		2	11,507		12,802
Total restructured loans	3	$	477	$	599	6	$	27,894	$	29,189

25

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, 2021 and 2020 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)
2021
Balance at beginning of period	$	17,108	$	26,256	$	9,160	$	15,898	$	1,471	$	5	$	69,898
Provision charged (credited)	(2,218)		(317)		322		2,854		(165)		4		480
Recoveries	4		294		—		42		7		—		347
Charge-offs	(106)		—		—		(69)		(221)		(3)		(399)
Balance at end of period	$	14,788	$	26,233	$	9,482	$	18,725	$	1,092	$	6	$	70,326
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

	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)
2021
Balance at beginning of period	$	13,586	$	30,681	$	11,271	$	17,384	$	1,748	$	6	$	74,676
Provision charged (credited)	1,796		(5,117)		(1,790)		2,945		(400)		5		(2,561)
Recoveries	18		1,231		1		169		52		—		1,471
Charge-offs	(612)		(562)		—		(1,773)		(308)		(5)		(3,260)
Balance at end of period	$	14,788	$	26,233	$	9,482	$	18,725	$	1,092	$	6	$	70,326
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

26

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, 2021 and December 31, 2020:

	At September 30, 2021
	Recorded Investment		Unpaid Principal Balance		Specific Allowance
	(In thousands)
With no allowance recorded:
Real estate loans:
One-to-four family	$	2,533	$	2,533	$	—
Multifamily and commercial	16,223		16,223		—
Commercial business loans	591		591		—
Consumer loans:
Home equity loans and advances	521		521		—
	19,868		19,868		—
With a specific allowance recorded:
Real estate loans:
One-to-four family	2,938		2,938		264
Multifamily and commercial	1,987		1,987		96
Commercial business loans	1,498		1,497		14
Consumer loans:
Home equity loans and advances	206		206		5
	6,629		6,628		379
Total:
Real estate loans:
One-to-four family	5,471		5,471		264
Multifamily and commercial	18,210		18,210		96
Commercial business loans	2,089		2,088		14
Consumer loans:
Home equity loans and advances	727		727		5
Total loans	$	26,497	$	26,496	$	379

27

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

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

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

    Specific allocations of the allowance for loan losses attributable to impaired loans totaled $379,000 and $1.1 million at September 30, 2021 and December 31, 2020, respectively. At September 30, 2021 and December 31, 2020, impaired loans for which there was no related allowance for loan losses totaled $19.9 million and $19.1 million, respectively.

    The recorded investment in TDRs totaled $23.5 million at September 30, 2021, of which one loan with a balance of $45,000 was 30-59 days past due, and one loan with a balance of $400,000 was 60-89 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, 2021. The recorded investment in TDRs totaled $45.4 million at December 31, 2020, of which one loan with a balance of $91,000 was over 90 days past due, and three loans totaling $11.9 million were 30-59 days past due. The remaining loans modified were current at the time of restructuring and have complied with the terms of their restructure agreement at December 31, 2020.

28

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, 2021 and 2020:

	For the Three Months Ended September 30,
	2021				2020
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(In thousands)
Real estate loans:
One-to-four family	$	5,569	$	64	$	8,020	$	74
Multifamily and commercial	26,103		227		23,525		227
Commercial business loans	2,106		36		4,979		52
Consumer loans:
Home equity loans and advances	1,101		11		1,935		28
Total loans	$	34,879	$	338	$	38,459	$	381

	For the Nine Months Ended September 30,
	2021				2020
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(In thousands)
Real estate loans:
One-to-four family	$	5,923	$	229	$	8,175	$	226
Multifamily and commercial	28,246		688		20,670		653
Commercial business loans	2,226		106		5,468		196
Consumer loans:
Home equity loans and advances	1,257		32		1,995		85
Total loans	$	37,652	$	1,055	$	36,308	$	1,160

    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.

29

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, 2021 and December 31, 2020:

	September 30, 2021
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Pass	$	1,927,870	$	3,052,850	$	271,897	$	427,793	$	263,650	$	1,772	$	5,945,832
Special mention	388		52,562		107		9,787		—		—		62,844
Substandard	5,618		32,049		—		12,441		461		—		50,569
Doubtful	—		—		—		—		—		—		—
Loss	—		—		—		—		—		—		—
Total	$	1,933,876	$	3,137,461	$	272,004	$	450,021	$	264,111	$	1,772	$	6,059,245

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

10.    Leases

    Effective January 1, 2020, the Company adopted ASU 2016-02 Leases (Topic 842) and all subsequent ASU's that modified Topic 842. The Company's leases primarily relate to real estate property for branches and office space. At September 30, 2021 and December 31, 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 3 years to 10 years. For each lease, these extension options were evaluated, and those which were considered reasonably certain of renewal were included in the lease term.

    At September 30, 2021 and December 31, 2020, the weighted average remaining lease term for operating leases was 6.9 years and 7.5 years, respectively, and the weighted average discount rate used in the measurement of operating lease liabilities was 2.14%, and 2.26%, respectively.

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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 months ended September 30, 2021 and 2020, operating and variable lease expenses totaled approximately $504,000 and $603,000, respectively. During the nine months ended September 30, 2021 and 2020, operating and variable lease expenses totaled approximately $1.7 million 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, 2021 and 2020. At September 30, 2021, 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, 2021	Lease Payment Obligations
	(In thousands)
One year or less	$	1,026
After one year to two years	4,008
After two years to three years	3,739
After three years to four years	3,014
After four years to five years	2,342
Thereafter	6,662
Total undiscounted cash flows	20,791
Discount on cash flows	(1,663)
Total lease liability	$	19,128

11.    Deposits

    Deposits at September 30, 2021 and December 31, 2020 are summarized as follows:

	September 30,		December 31,
	2021		2020
	(In thousands)
Non-interest-bearing demand	$	1,567,112	$	1,354,605
Interest-bearing demand	2,451,718		2,189,164
Money market accounts	636,392		588,180
Savings and club deposits	775,681		688,309
Certificates of deposit	1,791,455		1,958,366
Total deposits	$	7,222,358	$	6,778,624

Included in the above balances at September 30, 2021 and December 31, 2020 are certificates of deposit obtained through brokers, totaling $16.2 million and $26.3 million, respectively, that were acquired from Stewardship.

    The aggregate amount of certificates of deposit that meet or exceed $100,000 totaled approximately $934.9 million and $1.0 billion at September 30, 2021 and December 31, 2020, respectively. Interest expense on deposits for the three months ended September 30, 2021 and 2020 totaled $6.7 million and $12.8 million, respectively. Interest expense on deposits for the nine months ended September 30, 2021 and 2020 totaled $23.4 million and $44.6 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, 2021 and December 31, 2020 are summarized as follows:

	September 30,		December 31,
	2021		2020
	(In thousands)
One year or less	$	1,193,342	$	1,494,129
After one year to two years	365,668		337,579
After two years to three years	120,496		52,809
After three years to four years	29,925		23,018
After four years	82,024		50,831
	$	1,791,455	$	1,958,366

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, 1,389,570 shares of restricted stock were awarded, with a grant date fair value of $15.60 per share. To fund the grant of restricted common stock, the Company issued shares from authorized 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.

On December 14, 2020, 33,160 shares of restricted stock were awarded, with a grant date fair value of $15.08 per share. To fund the grant of restricted common stock, the Company reissued shares from treasury stock.

On March 22, 2021, 50,203 shares of restricted stock were awarded, with a grant date fair value of $17.86 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 1 year to 5 years, beginning 1 year from the date of grant. A portion of restricted shares awarded are performance vesting awards, which may or may not vest depending upon the attainment of certain corporate financial targets. Management recognizes compensation expense for the fair value of restricted shares on a straight line basis over the requisite performance or service period. During both the three months ended September 30, 2021 and 2020, approximately $1.4 million in expense was recognized in regard to these awards. The expected future compensation expense related to the 1,105,634 non-vested restricted shares outstanding at September 30, 2021 is approximately $9.7 million over a weighted average period of 2.1 years. During the nine months ended September 30, 2021 and 2020, approximately $4.3 million and $4.2 million in expense was recognized in regard to these awards.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

12.    Stock Based Compensation (continued)

    The following is a summary of the Company's restricted stock activity during the three and nine months ended September 30, 2021 and 2020:

	Number of Restricted Shares	Weighted Average Grant Date Fair Value
Non-vested at January 1, 2021	1,263,169	$	15.66
Grants	50,203	17.86
Forfeited	(13,846)	15.60
Non-vested at March 31, 2021	1,299,526	$	15.74
Forfeited	(128)	15.60
Non-vested at June 30, 2021	1,299,398	$	15.74
Vested	(163,882)	15.61
Forfeited	(29,882)	15.63
Non-vested at September 30, 2021	1,105,634	$	15.76

	Number of Restricted Shares	Weighted Average Grant Date Fair Value
Non-vested at January 1, 2020	1,420,012	$	15.67
Forfeited	(881)	15.60
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

On July 23, 2019, options to purchase 3,707,901 shares of Company common stock were awarded with a grant date fair value of $4.25 per option. Stock options granted under the 2019 Plan vest in equal installments over the service period of five years beginning one year from the date of grant. Stock options were granted at an exercise price of $15.60, which represents the fair value of the Company's common stock price on the grant date based on the closing market price, and have an expiration period of 10 years. The fair value of stock options granted was estimated utilizing the Black-Scholes option pricing model using the following assumptions: expected life of 6.5 years, risk-free rate of return of 1.90%, volatility of 22.12%, and a dividend yield of 0.00%.

     On December 16, 2019, options to purchase 184,378 shares of Company common stock were awarded with a grant date fair value of $4.59 per option. Stock options granted under the 2019 Plan generally vest in equal installments over the service period of five years beginning one year from the date of grant. Stock options were granted at an exercise price of $17.00, which represents the fair value of the Company's common stock price on the grant date based on the closing market price, and have an expiration period of approximately 10 years. The fair value of stock options granted was estimated utilizing the Black-Scholes option pricing model using the following assumptions: expected life of 6.5 years, risk-free rate of return of 1.79%, volatility of 22.23%, and a dividend yield of 0.00%.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

12.    Stock Based Compensation (continued)

On March 22, 2021, options to purchase 109,654 shares of Company common stock were awarded with a grant date fair value of $4.91 per option. Stock options granted under the 2019 Plan vest in equal installments over the service period of three years beginning one year from the date of grant. Stock options were granted at an exercise price of $17.86, 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 6.0 years, risk-free rate of return of 1.11%, volatility of 25.98%, 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 Company stock plus 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 months ended September 30, 2021 and 2020, approximately $822,000 and $808,000 in expense was recognized in regard to these awards. During the nine months ended September 30, 2021 and 2020, approximately $2.4 million and $2.4 million in expense was recognized in regard to these awards. The expected future compensation expense related to the 2,278,056 non-vested options outstanding at September 30, 2021 is $9.0 million over a weighted average period of 2.8 years.

    The following is a summary of the Company's option activity during the three and nine months ended September 30, 2021 and 2020:

	Number of Stock Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding, January 1, 2021	3,708,628	$	15.66	8.6	$	—
Granted	109,654	17.86		—	—
Expired	(2,029)	15.60		—	—
Forfeited	(30,118)	15.60		—	—
Outstanding, March 31, 2021	3,786,135	$	15.73	8.4	$	6,673,328
Exercised	(1,661)	15.60		—	—
Expired	(7,529)	15.60		—	—
Forfeited	(1,412)	15.60		—	—
Outstanding, June 30, 2021	3,775,533	$	15.73	8.1	$	5,700,258
Exercised	(26,861)	15.60		—	—
Expired	(353)	15.60		—	—
Forfeited	(58,287)	15.73		—	—
Outstanding, September 30, 2021	3,690,032	$	15.73	7.9	$	10,222,527
Options exercisable at September 30, 2021	1,411,976	$	15.64	7.8	$	4,036,196

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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, 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	$	—

    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.

    During the three and nine months ended September 30, 2021, the aggregate intrinsic value of options exercised was $56,186 and $59,991, respectively. There were no stock option exercises during the three and nine months ended September 30, 2020.

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.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

13.    Components of Net Periodic Benefit Cost (continued)

    Net periodic benefit (income) cost for Pension Plan, RIM Plan, Post-retirement Plan and Split-dollar Life Insurance plan benefits for the three and nine months ended September 30, 2021 and 2020, includes the following components:

	For the Three Months Ended September 30,
	Pension Plan				RIM Plan				Post-retirement Plan				Split-Dollar Life Insurance
	2021		2020		2021		2020		2021		2020		2021		2020		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	1,872	$	2,032	$	100	$	67	$	130	$	99	$	141	$	120	Compensation and employee benefits
Interest cost	1,902		1,824		86		102		141		171		125		135		Other non-interest expense
Expected return on plan assets	(6,661)		(5,908)		—		—		—		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		—		—		—		14		14		Other non-interest expense
Net loss	—		1,492		166		99		153		77		191		113		Other non-interest expense
Net periodic (income) benefit cost	$	(2,887)	$	(560)	$	352	$	268	$	424	$	347	$	471	$	382

	For the Nine Months Ended September 30,
	Pension Plan				RIM Plan				Post-retirement Plan				Split-Dollar Life Insurance
	2021		2020		2021		2020		2021		2020		2021		2020		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	6,172	$	5,906	$	300	$	201	$	390	$	297	$	423	$	346	Compensation and employee benefits
Interest cost	5,414		5,887		258		306		423		513		375		384		Other non-interest expense
Expected return on plan assets	(19,297)		(17,383)		—		—		—		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		—		—		—		42		42		Other non-interest expense
Net loss	2,000		3,054		498		297		459		231		573		339		Other non-interest expense
Net periodic (income) benefit cost	$	(5,711)	$	(2,536)	$	1,056	$	804	$	1,272	$	1,041	$	1,413	$	1,111

For the three and nine months ended September 30, 2021, a $35.0 million contribution was made to the Pension Plan. The net periodic (income) cost for pension benefits, other post-retirement and split dollar life insurance benefits for the three and nine months ended September 30, 2021 were calculated using the most recent available benefit valuations.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

13.    Components of Net Periodic Benefit Cost (continued)

    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, 2021 and 2020, the Company recorded a net periodic benefit cost of $2,000 and $4,000, and $6,000 and $8,000, respectively, in connection with this plan.

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, 2021 and December 31, 2020.

37

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

14.    Fair Value Measurements (continued)

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. 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 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.

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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, 2021 and December 31, 2020, by level within the fair value hierarchy:

	September 30, 2021
			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	$	39,303	$	35,194	$	4,109	$	—
Mortgage-backed securities and collateralized mortgage obligations	1,650,612		—		1,650,612		—
Municipal obligations	10,210		—		10,210		—
Corporate debt securities	64,741		—		64,741		—
Trust preferred securities	—		—		—		—
Total debt securities available for sale	1,764,866		35,194		1,729,672		—
Equity securities	2,785		2,439		346		—
Derivative assets	11,464		—		11,464		—
	$	1,779,115	$	37,633	$	1,741,482	$	—
Derivative liabilities	$	25,068	$	—	$	25,068	$	—

	December 31, 2020
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Debt securities available for sale:
U.S. government and agency obligations	$	25,549	$	25,549	$	—	$	—
Mortgage-backed securities and collateralized mortgage obligations	1,200,394		—		1,200,394		—
Municipal obligations	16,862		—		16,862		—
Corporate debt securities	69,477		—		69,477		—
Trust preferred securities	4,670		—		4,670		—
Total debt securities available for sale	1,316,952		25,549		1,291,403		—
Equity securities	5,418		5,072		346
Derivative assets	19,425		—		19,425		—
	$	1,341,795	$	30,621	$	1,311,174	$	—
Derivative liabilities	$	42,384	$	—	$	42,384	$	—

39

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

14.    Fair Value Measurements (continued)

There were no Level 3 assets measured at fair value on a recurring basis at September 30, 2021 and December 31, 2020.

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, 2021 and December 31, 2020.

Impaired Loans

    Loans which meet certain criteria are evaluated individually for impairment. Loan impairment is measured based on the present value of expected future cash flows discounted at the loan's effective interest rate or, as a practical expedient, at the loan's observable market price or the fair value of the collateral if the loan is collateral dependent. 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.

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, 2021 and December 31, 2020, by level within the fair value hierarchy:

	September 30, 2021
			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	$	1,213	$	—	$	—	$	1,213
Mortgage servicing rights	2,057		—		—		2,057
	$	3,270	$	—	$	—	$	3,270

	December 31, 2020
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Mortgage servicing rights	$	1,338	$	—	$	—	$	1,338
	$	1,338	$	—	$	—	$	1,338

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

14.    Fair Value Measurements (continued)

The following table presents information for Level 3 assets measured at fair value on a non-recurring basis at September 30, 2021 and December 31, 2020:

	September 30, 2021
	Fair Value		Valuation Methodology	Unobservable Inputs	Range of Inputs		Weighted Average
	(Dollars in thousands)
Impaired loans	$	1,213	Other	Contracted sale price of collateral	—	%	—	%
Mortgage servicing rights	2,057		Discounted cash flow	Prepayment speeds and discount rates (1)	7.5% - 25.0%		12.3	%

	December 31, 2020
	Fair Value		Valuation Methodology	Unobservable Inputs	Range of Inputs	Weighted Average
	(Dollars in thousands)
Mortgage servicing rights	$	1,338	Discounted cash flow	Prepayment speeds and discount rates (1)	9.7% - 26.2%	16.7	%
(1) 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.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

14.    Fair Value Measurements (continued)

The Company also holds debt instruments issued by the U.S. government and U.S. government-sponsored agencies that are traded in active markets with readily accessible quoted market prices that are considered Level 1 inputs within the fair value hierarchy.

Federal Home Loan Bank Stock ("FHLB")

    The fair value of FHLB stock is based on redemption at par value and can only be sold to the issuing FHLB, to other FHLBs, or to other member banks. As such, the Company's FHLB stock is recorded at cost, or par value, and is evaluated for impairment each reporting period by considering the ultimate recoverability of the investment rather than temporary declines in value. The Company classifies the estimated fair value as Level 2 within the fair value hierarchy.

Loans Receivable

    Fair values are estimated for portfolios of loans with similar financial characteristics. Loans are segregated by type such as commercial mortgage, residential mortgage, commercial, construction, and consumer and other. Each loan category is further segmented into fixed and adjustable rate interest terms and into performing and non-performing categories.

    The fair value of performing loans was estimated using a combination of techniques, including a discounted cash flow model that utilizes a discount rate that reflects the Company's current pricing for loans with similar characteristics and remaining maturity, adjusted by an amount for estimated credit losses inherent in the portfolio at the balance sheet date. The rates take into account the expected yield curve, as well as an adjustment for prepayment risk, when applicable. The Company classifies the estimated fair value of its loan portfolio as Level 3.

    The fair value for 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, 2021 and December 31, 2020:

	September 30, 2021
			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	$	298,488	$	298,488	$	298,488	$	—	$	—
Debt securities available for sale	1,764,866		1,764,866		35,194		1,729,672		—
Debt securities held to maturity	408,088		417,268		—		417,268		—
Equity securities	2,785		2,785		2,439		346		—
Federal Home Loan Bank stock	40,891		40,891		—		40,891		—
Loans receivable, net	6,013,968		6,230,842		—		—		6,230,842
Derivative assets	11,464		11,464		—		11,464		—
Financial liabilities:
Deposits	$	7,222,358	$	7,224,770	$	—	$	7,224,770	$	—
Borrowings	749,631		753,800		—		753,800		—
Derivative liabilities	25,068		25,068		—		25,068		—

	December 31, 2020
			Fair Value Measurements
	Carrying Value		Total Fair Value		Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
	(In thousands)
Financial assets:
Cash and cash equivalents	$	422,957	$	422,957	$	422,957	$	—	$	—
Debt securities available for sale	1,316,952		1,316,952		25,549		1,291,403		—
Debt securities held to maturity	262,720		277,091		5,001		272,090		—
Equity securities	5,418		5,418		5,072		346		—
Federal Home Loan Bank stock	43,759		43,759		—		43,759		—
Loans receivable, net	6,107,094		6,394,524		—		—		6,394,524
Derivative assets	19,425		19,425		—		19,425		—
Financial liabilities:
Deposits	$	6,778,624	$	6,793,034	$	—	$	6,793,034	$	—
Borrowings	799,364		808,853		—		808,853		—
Derivative liabilities	42,384		42,384		—		42,384		—

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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.

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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 income (loss), both gross and net of tax, for the three and nine months ended September 30, 2021 and 2020:

	For the Three Months Ended September 30,
	2021						2020
	Before Tax		Tax Effect		After Tax		Before Tax		Tax Effect		After Tax
	(In thousands)
Components of other comprehensive income (loss):
Unrealized (loss) on debt securities available for sale:	$	(13,609)	$	3,666	$	(9,943)	$	(3,688)	$	775	$	(2,913)
Accretion of unrealized (loss) on debt securities reclassified as held to maturity	(3)		1		(2)		(4)		—		(4)
Reclassification adjustment for gain included in net income	2,296		(505)		1,791		—		—		—
	(11,316)		3,162		(8,154)		(3,692)		775		(2,917)
Derivatives:
Unrealized gain on swap contracts accounted for as cash flow hedges	2,035		(568)		1,467		2,256		(471)		1,785
	2,035		(568)		1,467		2,256		(471)		1,785
Employee benefit plans:
Amortization of prior service cost included in net income	(14)		4		(10)		(14)		3		(11)
Reclassification adjustment of actuarial net (loss) included in net income	(1,511)		422		(1,089)		(1,071)		225		(846)
Change in funded status of retirement obligations	3,050		(852)		2,198		(41,434)		8,701		(32,733)
	1,525		(426)		1,099		(42,519)		8,929		(33,590)
Total other comprehensive income (loss)	$	(7,756)	$	2,168	$	(5,588)	$	(43,955)	$	9,233	$	(34,722)

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Notes to Unaudited Consolidated Financial Statements

15.    Other Comprehensive Income (Loss) (continued)

	For the Nine Months Ended September 30,
	2021						2020
	Before Tax		Tax Effect		After Tax		Before Tax		Tax Effect		After Tax
	(In thousands)
Components of other comprehensive income (loss):
Unrealized (loss) gain on debt securities available for sale:	$	(26,804)	$	4,615	$	(22,189)	$	28,736	$	(6,031)	$	22,705
Accretion of unrealized (loss) gain on debt securities reclassified as held to maturity	(24)		24		—		1		—		1
Reclassification adjustment for (loss) gain included in net income	2,015		(426)		1,589		370		(81)		289
	(24,813)		4,213		(20,600)		29,107		(6,112)		22,995
Derivatives:
Unrealized gain (loss) on swap contracts accounted for as cash flow hedges	9,182		(1,084)		8,098		(13,050)		2,736		(10,314)
	9,182		(1,084)		8,098		(13,050)		2,736		(10,314)
Employee benefit plans:
Amortization of prior service cost included in net income	(42)		11		(31)		(42)		10		(32)
Reclassification adjustment of actuarial net (loss) included in net income	(4,533)		1,266		(3,267)		(3,213)		674		(2,539)
Change in funded status of retirement obligations	40,541		(3,971)		36,570		(37,093)		7,789		(29,304)
	35,966		(2,694)		33,272		(40,348)		8,473		(31,875)
Total other comprehensive income (loss)	$	20,335	$	435	$	20,770	$	(24,291)	$	5,097	$	(19,194)

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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, 2021 and 2020:

	For the Three Months Ended September 30,
	2021								2020
	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	$	18,582	$	(10,225)	$	(51,624)	$	(43,267)	$	35,225	$	(20,573)	$	(67,859)	$	(53,207)
Current period changes in other comprehensive income (loss)	(8,154)		1,467		1,099		(5,588)		(2,917)		1,785		(33,590)		(34,722)
Total other comprehensive income (loss)	$	10,428	$	(8,758)	$	(50,525)	$	(48,855)	$	32,308	$	(18,788)	$	(101,449)	$	(87,929)

	For the Nine Months Ended September 30,
	2021								2020
	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	$	31,028	$	(16,856)	$	(83,797)	$	(69,625)	$	9,313	$	(8,474)	$	(69,574)	$	(68,735)
Current period changes in other comprehensive income (loss)	(20,600)		8,098		33,272		20,770		22,995		(10,314)		(31,875)		(19,194)
Total other comprehensive income (loss)	$	10,428	$	(8,758)	$	(50,525)	$	(48,855)	$	32,308	$	(18,788)	$	(101,449)	$	(87,929)

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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, 2021 and 2020:

	Accumulated Other Comprehensive Income (Loss) Components
	For the Three Months Ended September 30,				Affected Line Items in the Consolidated Statements of Income
	2021		2020
	(In thousands)
Reclassification adjustment for gain included in net income	$	2,296	$	—	Gain on securities transactions
Reclassification adjustment of actuarial net (loss) included in net income	(1,511)		(1,071)		Other non-interest expense
Total before tax	785		(1,071)
Income (tax) benefit	(83)		225
Net of tax	$	702	$	(846)

	Accumulated Other Comprehensive Income (Loss) Components
	For the Nine Months Ended September 30,				Affected Line Items in the Consolidated Statements of Income
	2021		2020
	(In thousands)
Reclassification adjustment for gain included in net income	$	2,015	$	370	Gain on securities transactions
Reclassification adjustment of actuarial net (loss) included in net income	(4,533)		(3,213)		Other non-interest expense
Total before tax	(2,518)		(2,843)
Income (tax) benefit	840		593
Net of tax	$	(1,678)	$	(2,250)

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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, 2021 and December 31, 2020, the Company had no currency forward contracts in place with commercial banking customers.

    Interest Rate Swaps. At both September 30, 2021 and December 31, 2020, the Company had interest rate swaps in place with 50 commercial banking customers executed by offsetting interest rate swaps with third parties, with an aggregated notional amount of $180.1 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, 2021 and December 31, 2020, the Company had 28 and 31 interest rate swaps with notional amounts of $400.0 million and $430.0 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, 2021 and 2020, 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, 2021 and December 31, 2020:

	September 30, 2021
	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	$	11,464	Other Liabilities	$	25,068
Total derivative instruments		$	11,464		$	25,068

	December 31, 2020
	Asset Derivative			Liability Derivative
	Consolidated Statements of Financial Condition	Fair Value		Consolidated Statements of Financial Condition	Fair Value
		(In thousands)
Derivatives:
Interest rate swaps	Other Assets	$	19,425	Other Liabilities	$	42,384
Total derivative instruments		$	19,425		$	42,384

    For the three months ended September 30, 2021 and 2020, losses/(gains) of $12,000 and $(44,000), respectively, were recorded for changes in fair value of interest rate swaps with third parties. For the nine months ended September 30, 2021 and 2020, (gains)/losses of $(189,000) and $406,000, respectively, were recorded for changes in fair value of interest rate swaps with third parties.

    At both September 30, 2021 and December 31, 2020, accrued interest was $1.0 million.

    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, 2021, the termination value of derivatives in a net liability position, which includes accrued interest, was $12.6 million. The Company has collateral posting thresholds with certain of its derivative counterparties, and has posted collateral of $24.1 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.

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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, 2021 and 2020.

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Non-interest income
In-scope of Topic 606:
Demand deposit account fees	$	986	$	787	$	2,682	$	2,706
Title insurance fees	1,431		1,218		4,554		3,445
Other non-interest income	1,934		1,749		5,633		4,688
Total in-scope non-interest income	4,351		3,754		12,869		10,839
Total out-of-scope non-interest income	4,523		4,155		18,991		10,469
Total non-interest income	$	8,874	$	7,909	$	31,860	$	21,308

    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, 2021 and through the financial statement issuance date of November 9, 2021. The Company has not identified any material subsequent events that would require adjustment or disclosure in the consolidated financial statements.

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COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

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

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, 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, the Company's ability to successfully implement its business strategy, including the consummation of its pending acquisition of Freehold Bank, 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, 2021 and December 31, 2020

Total assets increased $401.6 million, or 4.6%, to $9.2 billion at September 30, 2021 from $8.8 billion at December 31, 2020. The increase in total assets was primarily attributable to increases in debt securities available for sale of $447.9 million, debt securities held to maturity of $145.4 million, and other assets of $35.7 million, partially offset by decreases of $124.5 million in cash and cash equivalents, and $93.1 million in loans receivable, net.

Cash and cash equivalents decreased $124.5 million, or 29.4%, to $298.5 million at September 30, 2021 from $423.0 million at December 31, 2020. The decrease was primarily attributable to $834.6 million in purchases of debt securities available for sale and held to maturity, $79.1 million in repurchases of common stock under our stock repurchase program, and $56.5 million in prepayments of borrowings, partially offset by an increase in repayments on loans, repayments on mortgage-backed securities, and growth in deposits.

Debt securities available for sale increased $447.9 million, or 34.0%, to $1.8 billion at September 30, 2021 from $1.3 billion at December 31, 2020. The increase was attributable to purchases of $659.0 million of securities primarily consisting of U.S. government and agency obligations, mortgage-backed securities and municipal securities, and $99.6 million in purchases of guarantor swaps with Freddie Mac, partially offset by maturities, calls and sales of $41.5 million in U.S. government and agency obligations, corporate debt and municipal securities, and repayments of $243.1 million. The gross unrealized gain (loss) on debt securities available for sale decreased by $24.8 million during the nine months ended September 30, 2021.

Debt securities held to maturity increased $145.4 million, or 55.3%, to $408.1 million at September 30, 2021 from $262.7 million at December 31, 2020. The increase was primarily attributable to purchases of $175.5 million of securities primarily consisting of U.S. agency obligations and mortgage-backed securities, partially offset by calls of $5.1 million in U.S. agency obligations and repayments of $24.5 million.

Loans receivable, net, decreased $93.1 million, or 1.5%, to $6.0 billion at September 30, 2021 from $6.1 billion at December 31, 2020. Multi-family and commercial real estate loans increased $319.5 million, partially offset by decreases in commercial business loans, one-to-four family real estate loans, construction loans, and home equity loans and advances of $302.8 million, $6.5 million, $56.7 million and $57.1 million, respectively. The increase in multi-family and commercial real estate loans included the purchase of $73.6 million of loan participations. The decrease in commercial business loans was mainly due to the sale of $237.0 million in loans granted and $277.2 in forgiven PPP loans included as part of the Small Business Administration PPP. The allowance for loan loss balance decreased $4.4 million to $70.3 million at September 30, 2021 from $74.7 million at December 31, 2020, which was primarily attributable to a decrease in the balance of loans, a decrease in loan loss rates, and a decrease in the balance of delinquent and non-accrual loans, as well as the consideration of improving economic conditions. The current allowance for loan losses was calculated utilizing the existing incurred loss methodology. The Company elected to defer the adoption of the Current

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

Expected Credit Loss ("CECL") methodology as was originally permitted by the CARES Act and the Consolidated Appropriations Act, 2021, which, when enacted, extended certain provisions of the CARES Act. The Company expects to adopt CECL on January 1, 2022.

Other assets increased $35.7 million, or 17.0%, to $245.6 million at September 30, 2021 from $209.9 million at December 31, 2020. The increase in other assets consisted of an increase of $75.1 million in the Company's pension plan balance based on a revaluation of the plan, coupled with a $35.0 million contribution which increased the funded status of the Company's pension plan, partially offset by a decrease of $17.2 million in the collateral balance related to our swap agreement obligations, a decrease of $8.2 million in interest rate swap assets, and a decrease of $10.5 million in deferred taxes.

Total liabilities increased $382.0 million, or 4.9%, to $8.2 billion at September 30, 2021 from $7.8 billion at December 31, 2020. The increase was primarily attributable to an increase in total deposits of $443.7 million, or 6.5%, partially offset by a decrease in borrowings of $49.7 million, or 6.2%, and a decrease in accrued expenses and other liabilities of $15.5 million, or 8.8%. The increase in total deposits consisted of increases in non-interest-bearing and interest-bearing demand deposits of $212.5 million and $262.6 million, respectively, and money market accounts and savings and club deposits of $48.2 million and $87.4 million, respectively, partially offset by a decrease in certificates of deposit accounts of $166.9 million. The decrease in borrowings was primarily driven by the prepayment of $56.5 million of FHLB borrowings. The decrease in accrued expenses and other liabilities primarily consisted of a $17.3 million decrease in interest rate swap liabilities.

Total stockholders’ equity increased $19.6 million, or 1.9%, with a balance of $1.0 billion at both September 30, 2021 and December 31, 2020. The increase was primarily attributable to net income of $68.7 million, and a change in the pension obligation of $33.3 million due to a revaluation of the plan, partially offset by the repurchase of 4,633,540 shares of common stock totaling $79.1 million under our stock repurchase program.

Comparison of Results of Operations for the Three Months Ended September 30, 2021 and September 30, 2020

Net income of $21.0 million was recorded for the quarter ended September 30, 2021, an increase of $5.9 million, or 39.1%, compared to net income of $15.1 million for the quarter ended September 30, 2020. The increase in net income was primarily attributable to a $1.0 million increase in net interest income, a $2.0 million decrease in provision for loan losses, a $1.0 million increase in non-interest income, and a $4.3 million decrease in non-interest expense, partially offset by a $2.5 million increase in income tax expense.

Net interest income was $57.4 million for the quarter ended September 30, 2021, an increase of $1.0 million, or 1.8%, from $56.3 million for the quarter ended September 30, 2020. The increase in net interest income was primarily attributable to a $7.9 million decrease in interest expense, resulting from a decrease in both interest expense on deposits and interest expense on borrowings, partially offset by a $6.9 million decrease in interest income. The decrease in interest expense on deposits was driven by both an inflow of lower cost deposits and the repricing of existing deposits at significantly reduced rates as a result of a lower interest rate environment. The decrease in interest expense on borrowings was the result of decreases in both the average balance and average cost of borrowings. The decrease in interest income for the quarter ended September 30, 2021 was largely due to decreases in the average yields on interest-earning assets. Prepayment penalties, which are included in interest income on loans, totaled $778,000 for the quarter ended September 30, 2021, compared to $380,000 for the quarter ended September 30, 2020.

The average yield on loans for the quarter ended September 30, 2021 decreased 19 basis points to 3.66%, as compared to 3.85% for the quarter ended September 30, 2020, while the average yield on securities for the quarter ended September 30, 2021 decreased 45 basis points to 1.93%, as compared to 2.38% for the quarter ended September 30, 2020. The average yield on other interest-earning assets for the quarter ended September 30, 2021 decreased 72 basis points to 0.54%, as compared to 1.26% for the quarter ended September 30, 2020, as there were substantially higher average cash balances in low yielding bank accounts for the quarter ended September 30, 2021. Decreases in the average yields on these portfolios for the quarter ended September 30, 2021 were influenced by the lower interest rate environment as the Federal Reserve reduced interest rates by 150 basis points in March 2020 in response to the COVID-19 pandemic.

Total interest expense was $8.7 million for the quarter ended September 30, 2021, a decrease of $7.9 million, or 47.6%, from $16.6 million for the quarter ended September 30, 2020. The decrease in interest expense was primarily attributable to a 49 basis point decrease in the average cost of interest-bearing deposits which was partially offset by the impact of the increase in the average balance of deposits. The decrease in the cost of deposits was driven by both an inflow of lower cost deposits and the repricing of existing deposits at lower interest rates. Interest on borrowings decreased $1.8 million, or 46.4%, due to a decrease in the average balance of borrowings, coupled with a 34 basis point decrease in the cost of total borrowings.

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

The Company's net interest margin for the quarter ended September 30, 2021 decreased 3 basis points to 2.67%, when compared to 2.70% for the quarter ended September 30, 2020. The weighted average yield on interest-earning assets decreased 42 basis points to 3.08% for the quarter ended September 30, 2021 as compared to 3.50% for the quarter ended September 30, 2020. The average cost of interest-bearing liabilities decreased 50 basis points to 0.54% for the quarter ended September 30, 2021 as compared to 1.04% for the quarter ended September 30, 2020. The decrease in yields and costs for the quarter ended September 30, 2021 were largely driven by a continued lower interest rate environment.

The provision for loan losses for the quarter ended September 30, 2021 was $480,000, a decrease of $2.0 million, from $2.5 million for the quarter ended September 30, 2020. The comparatively lower level of provision for the 2021 period was primarily attributable to a decrease in the balance of loans, a decrease in loan loss rates, a decrease in the balances of delinquent and non-accrual loans, and the consideration of the improving economic environment.

Non-interest income was $8.9 million for the quarter ended September 30, 2021, an increase of $1.0 million, or 12.2%, from $7.9 million for the quarter ended September 30, 2020. The increase was primarily attributable to an increase in income from the gain on securities transactions of $2.3 million, partially offset by a decrease in income from the gain on the sale of loans of $1.7 million.

Non-interest expense was $37.1 million for the quarter ended September 30, 2021, a decrease of $4.3 million, or 10.5%, from $41.4 million for the quarter ended September 30, 2020. The decrease was primarily attributable to a decrease in compensation and employee benefits expense of $2.2 million, and a decrease in other non-interest expense of $2.1 million. The decrease in compensation and employee benefits expense was due to the 2020 period including $3.0 million in expense recorded in connection with a voluntary early retirement program which offered early retirement incentives for qualified employees. The decrease in other non-interest expense was primarily attributable to a $2.0 million decrease in pension plan expense.

Income tax expense was $7.7 million for the quarter ended September 30, 2021, an increase of $2.5 million, as compared to $5.3 million for the quarter ended September 30, 2020, mainly due to an increase in pre-tax income, and to a lesser extent, an increase in the Company's effective state income tax rate. The Company's effective tax rate was 26.9% and 25.8% for the quarters ended September 30, 2021 and 2020, respectively.

Comparison of Results of Operations for the Nine Months Ended September 30, 2021 and September 30, 2020

Net income of $68.7 million was recorded for the nine months ended September 30, 2021, an increase of $31.8 million, or 86.0%, compared to net income of $36.9 million for the nine months ended September 30, 2020. The increase in net income was primarily attributable to a $9.3 million increase in net interest income, a $20.4 million decrease in provision for loan losses, a $10.6 million increase in non-interest income, and a $5.0 million decrease in non-interest expense, partially offset by a $13.4 million increase in income tax expense.

Net interest income was $172.2 million for the nine months ended September 30, 2021, an increase of $9.3 million, or 5.7%, from $162.9 million for the nine months ended September 30, 2020. The increase in net interest income was primarily attributable to a $30.9 million decrease in interest expense, resulting from a decrease in both interest expense on deposits and interest expense on borrowings, partially offset by a $21.6 million decrease in interest income. The decrease in interest expense on deposits was driven by both an inflow of lower cost deposits and the repricing of existing deposits at a significantly reduced rate as a result of a lower interest rate environment. The decrease in interest expense on borrowings was the result of decreases in both the average balance and average cost of borrowings. During the nine months ended September 30, 2021, $56.5 million of Federal Home Loan Bank of New York ("FHLB") borrowings was prepaid, resulting in a $742,000 loss on early extinguishment of debt included in non-interest expense. The decrease in interest income for the nine months ended September 30, 2021 was largely due to decreases in the average yields on interest-earning assets. Prepayment penalties, which are included in interest income on loans, totaled $2.8 million for the nine months ended September 30, 2021, compared to $2.0 million for the nine months ended September 30, 2020.

The average yield on loans for the nine months ended September 30, 2021 decreased 23 basis points to 3.75%, as compared to 3.98% for the nine months ended September 30, 2020, while the average yield on securities for the nine months ended September 30, 2021 decreased 59 basis points to 1.96%, as compared to 2.55% for the nine months ended September 30, 2020. The average yield on other interest-earning assets for the nine months ended September 30, 2021 decreased 175 basis points to 0.70%, as compared to 2.45% for the nine months ended September 30, 2020, as there were substantially higher cash balances in low yielding bank accounts for the nine months ended September 30, 2021. Decreases in the average yields on these portfolios for the nine months ended September 30, 2021 were influenced by the lower interest rate environment as the Federal Reserve reduced interest rates in early 2020 in response to the COVID-19 pandemic.

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

Total interest expense was $29.4 million for the nine months ended September 30, 2021, a decrease of $30.9 million, or 51.3%, from $60.3 million for the nine months ended September 30, 2020. The decrease in interest expense was primarily attributable to a 61 basis point decrease in the average cost of interest-bearing deposits which was partially offset by the impact of the increase in the average balance of deposits. The decrease in the cost of deposits was driven by both an inflow of lower cost deposits and the repricing of existing deposits at lower interest rates. Interest on borrowings decreased $9.7 million due to a decrease in the average balance of borrowings, coupled with a 66 basis point decrease in the cost of total borrowings. During the nine months ended September 30, 2021, we prepaid $53.5 million of FHLB borrowings with an average rate of 2.64% and original contractual maturities through March 2022, and a $3.0 million FHLB borrowing acquired in our acquisition of Roselle Bank with a rate of 2.74% and an original contractual maturity of March 2024. The prepayments were funded by excess cash liquidity. The transactions were accounted for as early debt extinguishments resulting in a loss of $742,000.

The Company's net interest margin for the nine months ended September 30, 2021 increased 5 basis points to 2.75%, when compared to 2.70% for the nine months ended September 30, 2020. The weighted average yield on interest-earning assets decreased 47 basis points to 3.22% for the nine months ended September 30, 2021 as compared to 3.69% for the nine months ended September 30, 2020. Excluding the impact of the acceleration of Paycheck Protection Program ("PPP") loan deferred fee for the nine months ended September 30, 2021, the net interest margin would have been 2.65%. The average cost of interest-bearing liabilities decreased 66 basis points to 0.62% for the nine months ended September 30, 2021 as compared to 1.28% for the nine months ended September 30, 2020. The decreases in yields and costs for the nine months ended September 30, 2021 were largely driven by a continued lower interest rate environment. The net interest margin increased for the nine months ended September 30, 2021 as the cost of interest-bearing liabilities continued to reprice lower more rapidly than the yields on interest-earning assets.

The reversal of provision for loan loss recorded for the nine months ended September 30, 2021 was $2.6 million, a decrease of $20.4 million, from $17.8 million of provision for loan loss expense recorded for the nine months ended September 30, 2020. The comparatively lower level of provision for the 2021 period was primarily attributable to a decrease in the balance of loans, a decrease in loan loss rates, a decrease in the balances of delinquent and non-accrual loans, and the consideration of the improving economic environment.

Non-interest income was $31.9 million for the nine months ended September 30, 2021, an increase of $10.6 million, or 49.5%, from $21.3 million for the nine months ended September 30, 2020. The increase was primarily attributable to an increase in title insurance fees of $1.1 million, an increase in the income from gains on securities transactions of $1.6 million, an increase in income from the gain on the sale of loans of $7.4 million and an increase in other non-interest income of $1.9 million, partially offset by a decrease in the fair value of equity securities of $1.9 million. The increase in the gain on sale of loans was primarily attributable to a gain of $7.7 million resulting from the sale of $237.0 million of commercial business loans granted as part of the Small Business Administration PPP. Other non-interest income includes an increase of $900,000 from debit card transactions.

Non-interest expense was $112.4 million for the nine months ended September 30, 2021, a decrease of $5.0 million, or 4.2%, from $117.3 million for the nine months ended September 30, 2020. The decrease was primarily attributable to a decrease in compensation and employee benefits expense of $4.8 million, a decrease in merger-related expenses of $1.8 million, and a decrease in other non-interest expense of $1.7 million, partially offset by an increase in professional fees of $1.1 million, an increase in data processing and software expenses of $762,000 and the loss on the extinguishment of debt of $742,000. The decrease in compensation and employee benefits expense was primarily attributable to an increase in amounts deferred for direct loan origination costs as a result of an increase in originations, and due to the 2020 period including $3.0 million in expense recorded in connection with a voluntary early retirement program. Merger-related expenses recorded in the 2020 period related to the acquisitions of Stewardship Financial Corporation and Roselle Bank, while the 2021 period relates to the pending acquisition of Freehold Bank. The decrease in other non-interest expense included a $3.0 million decrease in pension plan expense, partially offset by $1.9 million increase related to interest rate swap transactions. Professional fees included an increase in consulting expenses related to information technology, and the increase in data processing and software expenses was attributable to the purchase and implementation of several digital banking and other Fintech solutions, as well as the amortization of software costs related to a digital small business lending solution. As noted above, during the nine months ended September 30, 2021, the Company utilized excess liquidity to prepay long-term borrowings which resulted in a $742,000 loss on the early extinguishment of debt.

Income tax expense was $25.5 million for the nine months ended September 30, 2021, an increase of $13.4 million, as compared to $12.1 million for the nine months ended September 30, 2020, mainly due to an increase in pre-tax income, and to a lesser extent, an increase in the Company's effective state income tax rate. The Company's effective tax rate was 27.1% and 24.7% for the nine months ended September 30, 2021 and 2020, respectively.

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

Asset Quality

The Company's non-performing loans at September 30, 2021 totaled $5.3 million, or 0.09% of total gross loans, as compared to $8.2 million, or 0.13% of total gross loans, at December 31, 2020. The $2.9 million decrease in non-performing loans was primarily attributable to decreases of $646,000 in non-performing one-to-four family real estate loans, $2.5 million in non-performing commercial business loans, and $360,000 in non-performing home equity loans and advances, partially offset by an increase of $560,000 in non-performing multifamily and commercial real estate loans. The decrease in non-performing one-to-four family real estate loans was due to a decrease in the number of loans from 13 non-performing loans at December 31, 2020 to 11 non-performing loans at September 30, 2021. The decrease in non-performing commercial business loans was mainly due to charge-offs totaling $1.7 million. The decrease in non-performing home equity loans and advances was due to a decrease in the number of loans from 12 non-performing loans at December 31, 2020 to six non-performing loans at September 30, 2021. Non-performing assets as a percentage of total assets totaled 0.06% at September 30, 2021 as compared to 0.09% at December 31, 2020.

For the quarter ended September 30, 2021, net charge-offs totaled $53,000 as compared to $397,000 for the quarter ended September 30, 2020. For the nine months ended September 30, 2021, net charge-offs totaled $1.8 million as compared to $3.4 million for the nine months ended September 30, 2020.

The Company's allowance for loan losses was $70.3 million, or 1.16% of total loans, at September 30, 2021, compared to $74.7 million, or 1.21% of total loans, at December 31, 2020. The decrease in the allowance for loan losses was primarily attributable to a decrease in the balance of loans, a decrease in loan loss rates, and a decrease in the balance of delinquent and non-accrual loans, as well as the consideration of improving economic conditions.

COVID-19

At September 30, 2021, there were 12 loans on deferral for $28.0 million, a decrease of $35.8 million, compared to $63.8 million at June 30, 2021, and a decrease of $57.1 million, compared to $85.1 million at December 31, 2020. These short-term loan modifications are treated in accordance with Section 4013 of the CARES Act and are not treated as troubled debt restructurings during the short-term modification period if the loan was not in arrears. The Consolidated Appropriations Act, 2021, which was enacted in late December 2020, extended certain provisions of the CARES Act, including provisions permitting loan deferral extension requests to not be treated as troubled debt restructurings.

At September 30, 2021, three loans totaling $25.7 million are remitting partial payments.

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 significant 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 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 as permitted by the CARES Act. The Company expects to adopt CECL on January 1, 2022.

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

    The Company maintains the allowance for loan losses through provisions for (reversal of) 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 business, 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 over a look-back period, adjusted for a loss emergence period. Qualitative adjustments give consideration to other qualitative or environmental factors such as trends and levels of delinquencies, impaired loans, charge-offs, recoveries and loan volumes, as well as national and local economic trends and conditions. Qualitative adjustments reflect risks in the loan portfolio not captured by the quantitative loss factors and, as such, are evaluated relative to risk levels present over the look-back period. The reserves resulting from the application of both the quantitative experiences and qualitative factors are combined to arrive at the allowance for loan losses for loans collectability evaluated for impairment,

    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. Beginning in March 2020, management established an additional qualitative loss factor solely related to the impact of COVID-19 in the calculation. 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 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 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. Management continues to evaluate the impact of the COVID-19 qualitative loss factor on a quarterly basis.

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

    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 projections of future taxable income. These 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. Management believes, based on current facts, that it is more likely than not that there will be sufficient taxable income in future years to realize federal deferred tax assets and that it is more likely than not that the benefits from certain state temporary differences will not be realized. At September 30, 2021 and December 31, 2020, the Company's net deferred tax (liabilities) assets totaled $(2.9) million and $7.2 million, respectively, which included a valuation allowance totaling $3.7 million and $3.4 million, respectively. Based upon projections of future taxable income and the ability to carryforward operating losses indefinitely, management believes it is more likely than not the Company will realize the remaining deferred tax assets.

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

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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.

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

    The table below sets forth, as of September 30, 2021, 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.

59

COLUMBIA FINANCIAL, INC. AND SUBSIDIARIES

Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

	Twelve Months Net Interest Income						Net Portfolio Value ("NPV")
Change in Interest Rates (Basis Points)	Amount		Dollar Change		Percent of Change		Estimated NPV		Present Value Ratio		Percent Change
					(Dollars in Thousands)
+300	$	217,711	$	2,048	0.95	%	$	1,002,027	12.01	%	(15.88)	%
+200	217,510		1,847		0.86		1,074,604		12.48		(9.79)
+100	216,806		1,143		0.53		1,138,092		12.80		(4.46)
Base	215,663		—		—		1,191,241		12.96		—
-100	202,166		(13,497)		(6.26)		1,118,563		11.83		(6.10)

    As of September 30, 2021, based on the scenarios above, net interest income would increase by approximately 0.86% if rates were to rise 200 basis points, and would decrease by 6.26% 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, 2021, 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 9.79%. If rates were to decrease 100 basis points, the model forecasts a 6.10% decrease in the NPV.

    Overall, our September 30, 2021 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 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, 2021 and December 31, 2020, 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 at September 30, 2021 and December 31, 2020 compared to the Federal Reserve Bank minimum capital adequacy requirements and the Federal Reserve Bank requirements for classification as a well-capitalized institution:

60

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, 2021:
Total capital (to risk-weighted assets)	$	1,073,154	16.82	%	$	510,380	8.00	%	$	669,873	10.50	%	N/A	N/A
Tier 1 capital (to risk-weighted assets)	1,002,277		15.71		382,785		6.00		542,278		8.50		N/A	N/A
Common equity tier 1 capital (to risk-weighted assets)	995,060		15.60		287,089		4.50		446,582		7.00		N/A	N/A
Tier 1 capital (to adjusted total assets)	1,002,277		11.02		363,841		4.00		363,841		4.00		N/A	N/A
At December 31, 2020:
Total capital (to risk-weighted assets)	$	1,070,361	18.54	%	$	461,766	8.00	%	$	606,068	10.50	%	N/A	N/A
Tier 1 capital (to risk-weighted assets)	988,172		17.29		346,325		6.00		490,627		8.50		N/A	N/A
Common equity tier 1 capital (to risk-weighted assets)	980,995		17.17		259,744		4.50		404,046		7.00		N/A	N/A
Tier 1 capital (to adjusted total assets)	988,172		11.38		350,923		4.00		350,923		4.00		N/A	N/A

61

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, 2021:
Total capital (to risk-weighted assets)	$	1,007,226	16.36	%	$	492,523	8.00	%	$	646,437	10.50	%	$	615,654	10.00	%
Tier 1 capital (to risk-weighted assets)	936,349		15.21		369,392		6.00		523,306		8.50		492,523		8.00
Common equity tier 1 capital (to risk-weighted assets)	936,349		15.21		277,044		4.50		430,958		7.00		400,175		6.50
Tier 1 capital (to adjusted total assets)	936,349		10.30		363,692		4.00		363,692		4.00		454,615		5.00
At December 31, 2020:
Total capital (to risk-weighted assets)	$	924,959	16.05	%	$	460,944	8.00	%	$	604,989	10.50	%	$	576,180	10.00	%
Tier 1 capital (to risk-weighted assets)	852,897		14.80		345,708		6.00		489,753		8.50		460,944		8.00
Common equity tier 1 capital (to risk-weighted assets)	852,897		14.80		259,281		4.50		403,326		7.00		374,517		6.50
Tier 1 capital (to adjusted total assets)	852,897		9.72		350,815		4.00		350,815		4.00		438,519		5.00

62

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, 2021. 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, 2021, 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.

63

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, 2020 filed with the Securities and Exchange Commission. As of September 30, 2021, 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, 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, 2021:

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, 2021	658,581	$	17.40	620,500	1,778,518
August 1 - 31, 2021	241,800	18.23		233,400	1,545,118
September 1 - 30, 2021	309,600	17.79		309,600	1,235,518
Total	1,209,981	$	17.67	1,163,500
(1) On February 1, 2021, the Company announced that its Board of Directors authorized a new stock repurchase program to acquire up to 5,000,000 shares of the Company's then issued and outstanding common stock, commencing upon the completion of the repurchase of the remaining shares under the Company's existing stock repurchase program that was approved in September 2020. On February 5, 2021, the Company completed the repurchases under the previous stock repurchase program.
(2) During the three months ended September 30, 2021, 29,882 shares were repurchased pursuant to forfeitures and 16,599 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.

64

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.
101.0	The following materials from the Company’s Quarterly Report to Stockholders on Form 10-Q for the quarter ended September 30, 2021, 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 the 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)

65

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, 2021	/s/Thomas J. Kemly
		Thomas J. Kemly
		President and Chief Executive Officer
		(Principal Executive Officer)
Date:	November 9, 2021	/s/Dennis E. Gibney
		Dennis E. Gibney
		Executive Vice President and Chief Financial Officer
		(Principal Financial and Accounting Officer)

66

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, 2021	/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, 2021	/s/Dennis E. Gibney
		Dennis E. Gibney
		Executive Vice President and Chief Financial Officer

EX-32.0

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, 2021 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, 2021	/s/Thomas J. Kemly
		Thomas J. Kemly
		President and Chief Executive Officer
Date:	November 9, 2021	/s/Dennis E. Gibney
		Dennis E. Gibney
		Executive Vice President and Chief Financial Officer

XML

Cover Page - shares	9 Months Ended
	Sep. 30, 2021	Nov. 04, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
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)		106,281,020
Entity Central Index Key	0001723596
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period	Q3
Amendment Flag	false

XML

Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets
Cash and due from banks	$ 298,359	$ 422,787
Short-term investments	129	170
Total cash and cash equivalents	298,488	422,957
Debt securities available for sale, at fair value	1,764,866	1,316,952
Debt securities held to maturity, at amortized cost (fair value of $417,268 and $277,091 at September 30, 2021 and December 31, 2020, respectively)	408,088	262,720
Equity securities, at fair value	2,785	5,418
Federal Home Loan Bank stock	40,891	43,759
Loans held-for-sale, at fair value	0	4,146
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	6,084,294	6,181,770
Less: allowance for loan losses	70,326	74,676
Loans receivable	6,013,968	6,107,094
Accrued interest receivable	27,857	29,456
Office properties and equipment, net	74,426	75,974
Bank-owned life insurance ("BOLI")	237,294	232,824
Goodwill and intangible assets	85,864	87,384
Other assets	245,593	209,852
Total assets	9,200,120	8,798,536
Liabilities:
Deposits	7,222,358	6,778,624
Borrowings	749,631	799,364
Advance payments by borrowers for taxes and insurance	36,039	32,570
Accrued expenses and other liabilities	161,216	176,691
Total liabilities	8,169,244	7,787,249
Stockholders' equity:
Preferred stock, $0.01 par value. 10,000,000 shares authorized; none issued and outstanding at September 30, 2021 and December 31, 2020	0	0
Common stock, $0.01 par value. 500,000,000 shares authorized; 122,039,731 shares issued and 106,297,899 shares outstanding at September 30, 2021 and 122,037,793 shares issued and 110,939,753 shares outstanding at December 31, 2020	1,220	1,220
Additional paid-in capital	617,548	609,531
Retained earnings	741,799	673,084
Accumulated other comprehensive loss	(48,855)	(69,625)
Treasury stock, at cost; 15,741,832 shares at September 30, 2021 and 11,098,040 shares at December 31, 2020	(242,447)	(163,015)
Common stock held by the Employee Stock Ownership Plan	(37,597)	(39,293)
Stock held by Rabbi Trust	(2,299)	(1,875)
Deferred compensation obligations	1,507	1,260
Total stockholders' equity	1,030,876	1,011,287
Total liabilities and stockholders' equity	$ 9,200,120	$ 8,798,536
Common stock, shares issued (in shares)	122,039,731	122,037,793

XML

Consolidated Statements of Financial Condition (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Debt securities held to maturity	$ 417,268	$ 277,091
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)	122,039,731	122,037,793
Common stock, shares outstanding (in shares)	106,297,899	110,939,753
Treasury stock, shares (in shares)	15,741,832	11,098,040

XML

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest income:
Loans receivable	$ 55,451	$ 63,258	$ 171,902	$ 192,511
Debt securities available for sale and equity securities	7,622	7,034	21,521	21,654
Debt securities held to maturity	2,353	1,749	6,256	5,807
Federal funds and interest earning deposits	167	71	310	287
Federal Home Loan Bank stock dividends	460	821	1,582	2,951
Total interest income	66,053	72,933	201,571	223,210
Interest expense:
Deposits	6,673	12,826	23,403	44,569
Borrowings	2,028	3,783	5,996	15,744
Total interest expense	8,701	16,609	29,399	60,313
Net interest income	57,352	56,324	172,172	162,897
Provision for (reversal of) loan losses	480	2,516	(2,561)	17,820
Net interest income after provision for (reversal of) loan losses	56,872	53,808	174,733	145,077
Non-interest income:
Bank-owned life insurance	1,504	1,531	4,475	4,467
Loan fees and service charges	844	565	2,209	1,826
Gain on securities transactions	2,296	0	2,015	370
Change in fair value of equity securities	(443)	(4)	(1,809)	55
Gain on sale of loans	140	1,873	10,814	3,422
Other non-interest income	2,116	1,939	6,920	5,017
Total non-interest income	8,874	7,909	31,860	21,308
Non-interest expense:
Compensation and employee benefits	24,512	26,666	71,506	76,349
Occupancy	4,846	4,823	14,912	14,319
Federal deposit insurance premiums	604	614	1,751	1,350
Advertising	662	484	1,860	2,075
Professional fees	1,766	1,680	5,207	4,129
Data processing and software expenses	2,798	2,825	8,181	7,419
Merger-related expenses	55	424	130	1,931
Loss on extinguishment of debt	0	0	742	0
Other non-interest expense	1,809	3,862	8,076	9,757
Total non-interest expense	37,052	41,378	112,365	117,329
Income before income tax expense	28,694	20,339	94,228	49,056
Income tax expense	7,712	5,252	25,513	12,107
Net income	$ 20,982	$ 15,087	$ 68,715	$ 36,949
Earnings per share - basic (in dollars per share)	$ 0.20	$ 0.14	$ 0.66	$ 0.34
Earnings per share - diluted (in dollars per share)	$ 0.20	$ 0.14	$ 0.66	$ 0.34
Weighted average shares outstanding - basic (in shares)	102,977,254	110,983,871	104,486,520	110,177,736
Weighted average shares outstanding - diluted (in shares)	102,977,254	110,983,871	104,486,520	110,177,736
Demand deposit account fees
Non-interest income:
Revenue from contract with customer	$ 986	$ 787	$ 2,682	$ 2,706
Title insurance fees
Non-interest income:
Revenue from contract with customer	$ 1,431	$ 1,218	$ 4,554	$ 3,445

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Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 20,982	$ 15,087	$ 68,715	$ 36,949
Other comprehensive gain (loss) income, net of tax:
Unrealized (loss) on debt securities available for sale	(9,943)	(2,913)	(22,189)	22,705
Accretion of unrealized (loss) on debt securities reclassified as held to maturity	(2)	(4)	0	1
Reclassification adjustment for gain included in net income	1,791	0	1,589	289
Total other comprehensive (loss) income, net of tax	(8,154)	(2,917)	(20,600)	22,995
Derivatives, net of tax:
Unrealized gain (loss) on swap contracts accounted for as cash flow hedges	1,467	1,785	8,098	(10,314)
Total derivative, net of tax	1,467	1,785	8,098	(10,314)
Employee benefit plans, net of tax:
Amortization of prior service cost included in net income	(10)	(11)	(31)	(32)
Reclassification adjustment of actuarial net (loss) included in net income	(1,089)	(846)	(3,267)	(2,539)
Change in funded status of retirement obligations	2,198	(32,733)	36,570	(29,304)
Total employee benefit plans, net of tax	1,099	(33,590)	33,272	(31,875)
Total other comprehensive (loss) income	(5,588)	(34,722)	20,770	(19,194)
Total comprehensive income (loss), net of tax	$ 15,394	$ (19,635)	$ 89,485	$ 17,755

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Consolidated Statements of Changes in Stockholder's Equity - 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
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
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]
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]
Repurchased shares for taxes (in shares)	11,782
Balance at beginning of period at Dec. 31, 2020	$ 1,011,287	1,220	609,531	673,084	(69,625)	(163,015)	(39,293)	(1,875)	1,260
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	68,715			68,715
Other comprehensive income (loss)	20,770				20,770
Treasury stock allocated to restricted stock award grants	0		(733)			733
Stock based compensation	6,743		6,743
Purchase of treasury stock	(79,090)					(79,090)
Exercise of stock options	(25)		(25)
Restricted stock forfeitures	0		783			(783)
Repurchase shares for taxes	(292)					(292)
Employee Stock Ownership Plan shares committed to be released	2,945		1,249				1,696
Funding of deferred compensation obligations	(177)							(424)	247
Balance at end of year at Sep. 30, 2021	$ 1,030,876	1,220	617,548	741,799	(48,855)	(242,447)	(37,597)	(2,299)	1,507
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchased shares for taxes (in shares)	16,599
Balance at beginning of period at Jun. 30, 2021	$ 1,033,046	1,220	614,381	720,817	(43,267)	(221,072)	(38,169)	(2,205)	1,341
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	20,982			20,982
Other comprehensive income (loss)	(5,588)				(5,588)
Stock based compensation	2,203		2,203
Purchase of treasury stock	(20,544)					(20,544)
Exercise of stock options	(26)		(26)
Restricted stock forfeitures	0		539			(539)
Repurchase shares for taxes	(292)					(292)
Employee Stock Ownership Plan shares committed to be released	1,023		451				572
Funding of deferred compensation obligations	72							(94)	166
Balance at end of year at Sep. 30, 2021	$ 1,030,876	$ 1,220	$ 617,548	$ 741,799	$ (48,855)	$ (242,447)	$ (37,597)	$ (2,299)	$ 1,507
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchased shares for taxes (in shares)	16,599

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Consolidated Statements of Changes in Stockholder's Equity (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Stockholders' Equity [Abstract]
Treasury stock, shares purchased (in shares)	1,163,500	624,932	4,633,540	4,081,132
Restricted stock, shares forfeited (in shares)	29,882	15,390	43,856	16,511
Repurchased shares for taxes (in shares)	16,599	11,782	16,599	11,782
Repurchase shares for taxes	$ (292)	$ 0	$ (292)	$ 0

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Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income	$ 68,715,000	$ 36,949,000
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Amortization of deferred loan costs, fees and purchased premiums and discounts	16,000	818,000
Net amortization of premiums and discounts on securities	3,497,000	1,573,000
Net amortization of mortgage servicing rights	200,000	85,000
Amortization of intangible assets	774,000	783,000
Depreciation and amortization of office properties and equipment	5,019,000	4,947,000
Amortization of operating lease right-of-use assets	2,720,000	2,641,000
Loss on extinguishment of debt	742,000	0
Provision for (reversal of) loan losses	(2,561,000)	17,820,000
Gain on securities transactions	(2,015,000)	(370,000)
Change in fair value of equity securities	1,809,000	(55,000)
Gain on securitizations	(2,259,000)	(1,523,000)
Gain on sale of loans	(8,555,000)	(1,899,000)
Loss on disposal of office properties and equipment	61,000	691,000
Loss on write-down of mortgage servicing rights	0	75,000
Deferred tax expense (benefit)	10,515,000	(3,864,000)
Decrease (increase) in accrued interest receivable	1,599,000	(8,481,000)
(Increase) in other assets	(12,891,000)	(80,110,000)
(Increase) decrease in accrued expenses and other liabilities	(4,941,000)	33,687,000
Income on bank-owned life insurance	(4,475,000)	(4,467,000)
Employee stock ownership plan expense	2,945,000	2,374,000
Stock based compensation	6,743,000	6,585,000
Increase in deferred compensation obligations under Rabbi Trust	(177,000)	(129,000)
Net cash provided by operating activities	67,481,000	8,130,000
Cash flows from investing activities:
Proceeds from sales of debt securities available for sale	27,249,000	20,761,000
Proceeds from sales of equity securities	1,260,000	0
Proceeds from paydowns/maturities/calls of debt securities available for sale	257,347,000	162,161,000
Proceeds from paydowns/maturities/calls of debt securities held to maturity	29,616,000	30,988,000
Purchases of debt securities available for sale	(659,015,000)	(201,504,000)
Purchases of debt securities held to maturity	(175,491,000)	(5,000,000)
Purchases of equity securities	(91,000)	0
Proceeds from sales of loans held-for-sale	293,005,000	111,764,000
Proceeds from sales of loans receivable	0	28,923,000
Purchases of loans receivable	(74,232,000)	0
Net increase in loans receivable	(208,260,000)	(294,040,000)
Proceeds from bank-owned life insurance death benefits	5,000	0
Proceeds from redemptions of Federal Home Loan Bank stock	7,661,000	40,717,000
Purchases of Federal Home Loan Bank stock	(4,793,000)	(22,544,000)
Proceeds from sales of office properties and equipment	685,000	0
Additions to office properties and equipment	(4,217,000)	(3,750,000)
Net cash acquired in acquisition	0	155,248,000
Net cash (used in) provided by investing activities	(509,271,000)	23,724,000
Cash flows from financing activities:
Net increase in deposits	443,734,000	650,572,000
Proceeds from long-term borrowings	37,120,000	90,000,000
Payments on long-term borrowings	(54,168,000)	(181,345,000)
Net decrease in short-term borrowings	(33,427,000)	(321,595,000)
Payment of subordinated debt	0	(16,600,000)
Increase in advance payments by borrowers for taxes and insurance	3,469,000	(2,235,000)
Exercise of stock options	(25,000)	0
Purchase of treasury stock	(79,090,000)	(60,286,000)
Repurchase of shares for taxes	(292,000)	0
Restricted stock forfeitures	0	(16,000)
Net cash provided by financing activities	317,321,000	158,495,000
Net (decrease) increase in cash and cash equivalents	(124,469,000)	190,349,000
Cash and cash equivalents at beginning of year	422,957,000	75,547,000
Cash and cash equivalents at end of period	298,488,000	265,896,000
Cash paid during the period for:
Interest on deposits and borrowings	29,544,000	60,772,000
Income tax payments, net of refunds	13,203,000	12,249,000
Non-cash investing and financing activities:
Transfer of loans receivable to loans held-for-sale	280,304,000	114,171,000
Securitization of loans	99,603,000	48,526,000
Initial recognition of operating lease right-of-use assets	0	22,218,000
Initial recognition of operating lease liabilities	0	23,290,000
Non-cash assets acquired:
Debt securities available for sale	0	51,479,000
Debt securities held to maturity	0	13,418,000
Equity securities	0	1,796,000
Federal Home Loan Bank stock	0	2,010,000
Loans receivable	0	171,593,000
Accrued interest receivable	0	679,000
Office properties and equipment, net	0	5,774,000
Bank-owned life insurance	0	17,245,000
Other assets	0	2,823,000
Total non-cash assets acquired	0	266,817,000
Liabilities assumed:
Deposits	0	333,234,000
Borrowings	0	37,728,000
Advance payments by borrowers for taxes and insurance	0	982,000
Accrued expenses and other liabilities	0	5,400,000
Total liabilities assumed	0	377,344,000
Net non-cash liabilities assumed	0	(110,527,000)
Noncash Investing and Financing Activities Disclosure
Net cash and cash equivalents acquired in acquisition	$ 0	$ 155,248,000

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Basis of Financial Statement Presentation

9 Months Ended

Sep. 30, 2021

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, 2021 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, 2020 and the audited consolidated financial statements included therein.

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Acquisitions

9 Months Ended

Sep. 30, 2021

Business Combination and Asset Acquisition [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. The aggregate merger consideration paid was $136.3 million. 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. During the nine months ended September 30, 2021, the Bank recorded additional losses of $301,000 related to these branches. A credit of $14,000 related to one of these branches was recorded for the three months ended September 30, 2021.

    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. There were no merger expenses recorded for the three and nine months ended September 30, 2021.

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 Columbia Financial as the surviving entity; and Roselle Bank merged with and into the Bank, with the Bank as the surviving institution. Under the terms of the merger agreement, depositors of Roselle Bank became depositors of the Bank and have the same rights and privileges in the MHC as if their accounts had been established at the Bank on the date established at Roselle Bank. The Company issued 4,759,048 shares of its common stock to the MHC, representing an amount equal to the fair value of the Roselle Entities as determined by an independent appraiser, at the effective time of the merger.

Merger-related expenses are recorded in the Consolidated Statements of Income and are expensed as incurred. Direct acquisition and other charges incurred in connection with the Roselle acquisition totaled $175,000 and $618,000 during the three and nine months ended September 30, 2020. There were no merger expenses recorded for the three and nine months ended September 30, 2021.

    The following table sets forth assets acquired and liabilities assumed in the Roselle acquisition, 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)

Roselle Bank (continued)

    The assets acquired and liabilities assumed have been accounted for under the acquisition method of accounting. The assets and liabilities were recorded at their fair values as of April 1, 2020, and resulted in the recognition of goodwill of $23.8 million. The determination of the fair value of assets acquired and liabilities assumed required management to make estimates about discount rates, future expected cash flows, market condition, and other future events that are highly subjective in nature and subject to change. During the fourth quarter of 2020, the Company completed all tax returns related to the operation of the acquired entity and its impact on the Company's income taxes, which resulted in a $5.1 million adjustment to deferred income taxes, net, and a decrease in goodwill. During the quarter ended March 31, 2021, the Company recorded a final adjustment of $1.1 million to deferred income taxes, net, and a decrease in goodwill. At September 30, 2021, goodwill related to the Roselle acquisition totaled $17.6 million.

Freehold Bank

As previously disclosed, on June 17, 2021, the MHC, Columbia Financial, Inc. and the Bank (collectively, “Columbia”), entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Freehold MHC, Freehold Bancorp and Freehold Bank (collectively, “Freehold”), pursuant to which Columbia will acquire Freehold, with Freehold MHC and Freehold Bancorp merging into the MHC and Columbia Financial, respectively. At the effective time of these mergers, Freehold Bank will convert to a federal savings bank and operate as a wholly-owned subsidiary of Columbia Financial. As a subsidiary of Columbia Financial, current depositors of Freehold Bank will become members of, and will have the same rights and privileges in the MHC, the mutual holding company parent of Columbia Bank, as if their accounts had been established in Columbia Bank on the date established at Freehold. As part of the transaction, Columbia Financial will issue additional shares of its common stock to the MHC in an amount equal to the fair value of Freehold as determined by an independent appraiser. These shares are expected to be issued immediately prior to completion of the mergers. The Merger Agreement has been unanimously approved by the Boards of Directors of each of Columbia Financial, the MHC and the Bank and the Boards of Directors of each of Freehold MHC, Freehold Bancorp and Freehold Bank. Subject to the receipt of all required regulatory and other approvals, and the satisfaction or waiver of other customary closing conditions, the parties anticipate that the transactions contemplated by the Merger Agreement is anticipated to close in the fourth quarter of 2021.

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 pending Freehold acquisition totaled $55,000 and $130,000 during the three and nine months ended September 30, 2021. There were no merger expenses recorded for the three and nine months ended September 30, 2020.

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Earnings per Share

9 Months Ended

Sep. 30, 2021

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, 2021 and 2020:

3.        Earnings per Share (continued)

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2021		2020		2021		2020
	(Dollars in thousands, except per share data)
Net income	$	20,982	$	15,087	$	68,715	$	36,949
Shares:
Weighted average shares outstanding - basic	102,977,254		110,983,871		104,486,520		110,177,736
Weighted average dilutive shares outstanding	—		—		—		—
Weighted average shares outstanding - diluted	102,977,254		110,983,871		104,486,520		110,177,736
Earnings per share:
Basic	$	0.20	$	0.14	$	0.66	$	0.34
Diluted	$	0.20	$	0.14	$	0.66	$	0.34

    During the three and nine months ended September 30, 2021, the average number of stock options which could potentially dilute basic earnings per share in the future that were not included in the computation of diluted earnings per share because to do so would have been anti-dilutive totaled 3,731,901 and 3,741,138, respectively. During the three and nine months ended September 30, 2020, the average number of stock options which could potentially dilute basic earnings per share in the future that were not included in the computation of diluted earnings per share because to do so would have been anti-dilutive totaled 3,771,082 and 3,769,793, respectively.

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Stock Repurchase Program

9 Months Ended

Sep. 30, 2021

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 the Board of Directors had expanded its stock repurchase program to authorize the purchase of an additional 3,000,000 shares of the Company's outstanding common stock in addition to the shares remaining under the repurchase program announced on June 11, 2019. On April 23, 2020, the Company completed the repurchases under these stock repurchase programs.

On September 10, 2020, the Company announced that its Board of Directors authorized the Company's second stock repurchase program for the purchase of up to 5,000,000 shares, or approximately 4.3%, of the Company's issued and outstanding common stock, commencing on September 15, 2020. On February 5, 2021, the Company completed the repurchases under the second stock repurchase program. On February 1, 2021, the Company announced that its Board of Directors authorized the Company's third stock repurchase program to acquire up to 5,000,000 shares, or approximately 4.5%, of the Company's then issued and outstanding common stock, commencing upon completion of the Company's second stock repurchase program.

     During the three and nine months ended September 30, 2021, the Company repurchased 1,163,500 shares at a cost of approximately $20.5 million, or $17.66 per share, and 4,633,540 shares, at a cost of approximately $79.1 million, or $17.07 per share, respectively, under these programs. 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. 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, 2021

Accounting Standards Update and Change in Accounting Principle [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

Accounting Pronouncement Adopted in 2021

    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

5.    Summary of Significant Accounting Policies

Accounting Pronouncement Adopted in 2021 (continued)

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 Company adopted this ASU effective January 1, 2021. The update will be applied on a retrospective basis to disclosures with regard to employee benefit plans. The adoption of this update did not have a significant impact on the Company's consolidated financial statements.

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

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

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

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

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

    Based on several analyses performed, as well as an implementation analysis utilizing existing exposures and forecasts of macroeconomic conditions at September 30, 2021, we currently expect the adoption of ASU 2016-13 will result in a decrease between 15% and 25% in our allowance for loan losses and our reserves for unfunded commitments.

    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 decrease 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

5.    Summary of Significant Accounting Policies

Accounting Pronouncements Not Yet Adopted (continued)

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 as of January 1, 2022, currently the allowance for loan losses, will be reflected as an adjustment, net of tax, to retained earnings.

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Debt Securities Available for Sale

9 Months Ended

Sep. 30, 2021

Investments, Debt and Equity Securities [Abstract]

Debt Securities Available for Sale

Debt Securities Available for Sale

    Debt securities available for sale at September 30, 2021 and December 31, 2020 are summarized as follows:

	September 30, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
			(In thousands)
U.S. government and agency obligations	$	38,651	$	749	$	(97)	$	39,303
Mortgage-backed securities and collateralized mortgage obligations	1,638,630		21,077		(9,095)		1,650,612
Municipal obligations	10,190		20		—		10,210
Corporate debt securities	62,743		2,227		(229)		64,741
	$	1,750,214	$	24,073	$	(9,421)	$	1,764,866

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

    The amortized cost and fair value of debt securities available for sale at September 30, 2021, 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.

6.    Debt Securities Available for Sale (continued)

	September 30, 2021
	Amortized Cost		Fair Value
	(In thousands)
One year or less	$	6,944	$	6,944
More than one year to five years	68,415		70,837
More than five years to ten years	36,225		36,473
	$	111,584	$	114,254
Mortgage-backed securities and collateralized mortgage obligations	1,638,630		1,650,612
	$	1,750,214	$	1,764,866

    Mortgage-backed securities and collateralized mortgage obligations totaling $1.6 billion at amortized cost, and $1.7 billion at fair value, are not classified by maturity in the table above as their expected lives are likely to be shorter than the contractual maturity date due to principal prepayments.

    During the three months ended September 30, 2021, the sales of debt securities available for sale totaled $22.5 million, resulting in a gross gains of $2.0 million and no gross losses. Proceeds from called debt securities available for sale totaled $9.0 million, resulting in no gross gains or losses. No debt securities available for sale matured during the quarter.

During the nine months ended September 30, 2021, the sale of debt securities available for sale totaled $27.2 million, resulting in a gross gains of $2.0 million and gross losses of $281,000. Proceeds from called debt securities available for sale totaled $14.0 million, resulting in no gross gains or losses. Proceeds from matured debt securities available for sale totaled $210,000.

    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, the sale of debt securities available for sale totaled $20.8 million, resulting in gross gains of $369,000. Proceeds from called debt securities available for sale totaled $6.6 million, resulting in $1,000 of gross gains. Proceeds from matured debt securities available for sale totaled $5.8 million.

Debt securities available for sale having a carrying value of $567.8 million and $822.2 million, at September 30, 2021 and December 31, 2020, 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, 2021 and December 31, 2020 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

6.    Debt Securities Available for Sale (continued)    

	September 30, 2021
	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	$	9,804	$	(97)	$	—	$	—	$	9,804	$	(97)
Mortgage-backed securities and collateralized mortgage obligations	694,865		(8,178)		61,308		(917)		756,173		(9,095)
Corporate debt securities	4,996		(4)		4,775		(225)		9,771		(229)
	$	709,665	$	(8,279)	$	66,083	$	(1,142)	$	775,748	$	(9,421)

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

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, 2021, 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, 2021 totaled 83, compared with 40 at December 31, 2020. All temporarily impaired securities were investment grade as of September 30, 2021 and December 31, 2020.

    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, 2021 and 2020.

Debt Securities Held to Maturity

    Debt securities held to maturity at September 30, 2021 and December 31, 2020 are summarized as follows:

	September 30, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
	(In thousands)
U.S. government and agency obligations	$	44,870	$	—	$	(489)	$	44,381
Mortgage-backed securities and collateralized mortgage obligations	363,218		10,088		(419)		372,887
	$	408,088	$	10,088	$	(908)	$	417,268

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

The amortized cost and fair value of debt securities held to maturity at September 30, 2021, 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, 2021
	Amortized Cost		Fair Value
	(In thousands)
More than one year to five years	$	14,875	$	14,857
More than five years to ten years	19,995		19,685
More than ten years	10,000		9,839
	44,870		44,381
Mortgage-backed securities and collateralized mortgage obligations	363,218		372,887
	$	408,088	$	417,268

Mortgage-backed securities and collateralized mortgage obligations totaling $363.2 million at amortized cost, and $372.9 million at fair value at September 30, 2021, 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, 2021, there were no sales or maturities of debt securities held to maturity. During the nine months ended September 30, 2021, proceeds from called debt securities held to maturity totaled $5.1 million, resulting in no gross gains or losses.

    During the three and nine months ended September 30, 2020, there were no sales or maturities of debt securities held to maturity. During the three and nine months ended September 30, 2020, proceeds from called debt securities held to maturity totaled $20.0 million, resulting in no gross gains or losses.

7.    Debt Securities Held to Maturity (continued)

Debt securities held to maturity having a carrying value of $256.9 million and $220.5 million, at September 30, 2021 and December 31, 2020, 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, 2021 and December 31, 2020 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	September 30, 2021
	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	$	44,381	$	(489)	$	—	$	—	$	44,381	$	(489)
Mortgage-backed securities and collateralized mortgage obligations	18,804		(419)		—		—		18,804		(419)
	$	63,185	$	(908)	$	—	$	—	$	63,185	$	(908)

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

    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, 2021, 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, 2021 totaled ten, compared with two at December 31, 2020. All temporarily impaired securities were investment grade as of September 30, 2021 and December 31, 2020.

    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, 2021 and 2020.

Equity Securities at Fair Value

    The Company has an equity securities portfolio which consists of stock in other financial institutions, a payment technology company, a community bank correspondent services company, and preferred stock in U.S. Government agencies which are reported at fair value on the Company's Consolidated Statements of Financial Condition. The fair value of the equities portfolio at September 30, 2021 and December 31, 2020 was $2.8 million and $5.4 million, respectively.

    The Company recorded a net (decrease) in the fair value of equity securities of $(443,000) and $(1.8) million, during the three and nine months ended September 30, 2021, respectively, as a component of non-interest income. During the three and nine months ended September 30, 2020, the Company recorded a net (decrease) increase in the fair value of equity securities of $(4,000) and $55,000, respectively, as a component of non-interest income.

    During the three and nine months ended September 30, 2021, sales of equity securities totaled $1.3 million, resulting in gross gains of $344,000 and no gross losses. During the three and nine months ended September 30, 2020, there were no sales of equity securities.

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Debt Securities Held to Maturity

9 Months Ended

Sep. 30, 2021

Investments, Debt and Equity Securities [Abstract]

Debt Securities Held to Maturity

Debt Securities Available for Sale

    Debt securities available for sale at September 30, 2021 and December 31, 2020 are summarized as follows:

	September 30, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
			(In thousands)
U.S. government and agency obligations	$	38,651	$	749	$	(97)	$	39,303
Mortgage-backed securities and collateralized mortgage obligations	1,638,630		21,077		(9,095)		1,650,612
Municipal obligations	10,190		20		—		10,210
Corporate debt securities	62,743		2,227		(229)		64,741
	$	1,750,214	$	24,073	$	(9,421)	$	1,764,866

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

    The amortized cost and fair value of debt securities available for sale at September 30, 2021, 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.

6.    Debt Securities Available for Sale (continued)

	September 30, 2021
	Amortized Cost		Fair Value
	(In thousands)
One year or less	$	6,944	$	6,944
More than one year to five years	68,415		70,837
More than five years to ten years	36,225		36,473
	$	111,584	$	114,254
Mortgage-backed securities and collateralized mortgage obligations	1,638,630		1,650,612
	$	1,750,214	$	1,764,866

    Mortgage-backed securities and collateralized mortgage obligations totaling $1.6 billion at amortized cost, and $1.7 billion at fair value, are not classified by maturity in the table above as their expected lives are likely to be shorter than the contractual maturity date due to principal prepayments.

    During the three months ended September 30, 2021, the sales of debt securities available for sale totaled $22.5 million, resulting in a gross gains of $2.0 million and no gross losses. Proceeds from called debt securities available for sale totaled $9.0 million, resulting in no gross gains or losses. No debt securities available for sale matured during the quarter.

During the nine months ended September 30, 2021, the sale of debt securities available for sale totaled $27.2 million, resulting in a gross gains of $2.0 million and gross losses of $281,000. Proceeds from called debt securities available for sale totaled $14.0 million, resulting in no gross gains or losses. Proceeds from matured debt securities available for sale totaled $210,000.

    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, the sale of debt securities available for sale totaled $20.8 million, resulting in gross gains of $369,000. Proceeds from called debt securities available for sale totaled $6.6 million, resulting in $1,000 of gross gains. Proceeds from matured debt securities available for sale totaled $5.8 million.

Debt securities available for sale having a carrying value of $567.8 million and $822.2 million, at September 30, 2021 and December 31, 2020, 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, 2021 and December 31, 2020 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

6.    Debt Securities Available for Sale (continued)    

	September 30, 2021
	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	$	9,804	$	(97)	$	—	$	—	$	9,804	$	(97)
Mortgage-backed securities and collateralized mortgage obligations	694,865		(8,178)		61,308		(917)		756,173		(9,095)
Corporate debt securities	4,996		(4)		4,775		(225)		9,771		(229)
	$	709,665	$	(8,279)	$	66,083	$	(1,142)	$	775,748	$	(9,421)

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

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, 2021, 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, 2021 totaled 83, compared with 40 at December 31, 2020. All temporarily impaired securities were investment grade as of September 30, 2021 and December 31, 2020.

    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, 2021 and 2020.

Debt Securities Held to Maturity

    Debt securities held to maturity at September 30, 2021 and December 31, 2020 are summarized as follows:

	September 30, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
	(In thousands)
U.S. government and agency obligations	$	44,870	$	—	$	(489)	$	44,381
Mortgage-backed securities and collateralized mortgage obligations	363,218		10,088		(419)		372,887
	$	408,088	$	10,088	$	(908)	$	417,268

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

The amortized cost and fair value of debt securities held to maturity at September 30, 2021, 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, 2021
	Amortized Cost		Fair Value
	(In thousands)
More than one year to five years	$	14,875	$	14,857
More than five years to ten years	19,995		19,685
More than ten years	10,000		9,839
	44,870		44,381
Mortgage-backed securities and collateralized mortgage obligations	363,218		372,887
	$	408,088	$	417,268

Mortgage-backed securities and collateralized mortgage obligations totaling $363.2 million at amortized cost, and $372.9 million at fair value at September 30, 2021, 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, 2021, there were no sales or maturities of debt securities held to maturity. During the nine months ended September 30, 2021, proceeds from called debt securities held to maturity totaled $5.1 million, resulting in no gross gains or losses.

    During the three and nine months ended September 30, 2020, there were no sales or maturities of debt securities held to maturity. During the three and nine months ended September 30, 2020, proceeds from called debt securities held to maturity totaled $20.0 million, resulting in no gross gains or losses.

7.    Debt Securities Held to Maturity (continued)

Debt securities held to maturity having a carrying value of $256.9 million and $220.5 million, at September 30, 2021 and December 31, 2020, 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, 2021 and December 31, 2020 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	September 30, 2021
	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	$	44,381	$	(489)	$	—	$	—	$	44,381	$	(489)
Mortgage-backed securities and collateralized mortgage obligations	18,804		(419)		—		—		18,804		(419)
	$	63,185	$	(908)	$	—	$	—	$	63,185	$	(908)

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

    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, 2021, 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, 2021 totaled ten, compared with two at December 31, 2020. All temporarily impaired securities were investment grade as of September 30, 2021 and December 31, 2020.

    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, 2021 and 2020.

Equity Securities at Fair Value

    The Company has an equity securities portfolio which consists of stock in other financial institutions, a payment technology company, a community bank correspondent services company, and preferred stock in U.S. Government agencies which are reported at fair value on the Company's Consolidated Statements of Financial Condition. The fair value of the equities portfolio at September 30, 2021 and December 31, 2020 was $2.8 million and $5.4 million, respectively.

    The Company recorded a net (decrease) in the fair value of equity securities of $(443,000) and $(1.8) million, during the three and nine months ended September 30, 2021, respectively, as a component of non-interest income. During the three and nine months ended September 30, 2020, the Company recorded a net (decrease) increase in the fair value of equity securities of $(4,000) and $55,000, respectively, as a component of non-interest income.

    During the three and nine months ended September 30, 2021, sales of equity securities totaled $1.3 million, resulting in gross gains of $344,000 and no gross losses. During the three and nine months ended September 30, 2020, there were no sales of equity securities.

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Equity Securities at Fair Value

9 Months Ended

Sep. 30, 2021

Investments, Debt and Equity Securities [Abstract]

Equity Securities at Fair Value

Debt Securities Available for Sale

    Debt securities available for sale at September 30, 2021 and December 31, 2020 are summarized as follows:

	September 30, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
			(In thousands)
U.S. government and agency obligations	$	38,651	$	749	$	(97)	$	39,303
Mortgage-backed securities and collateralized mortgage obligations	1,638,630		21,077		(9,095)		1,650,612
Municipal obligations	10,190		20		—		10,210
Corporate debt securities	62,743		2,227		(229)		64,741
	$	1,750,214	$	24,073	$	(9,421)	$	1,764,866

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

    The amortized cost and fair value of debt securities available for sale at September 30, 2021, 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.

6.    Debt Securities Available for Sale (continued)

	September 30, 2021
	Amortized Cost		Fair Value
	(In thousands)
One year or less	$	6,944	$	6,944
More than one year to five years	68,415		70,837
More than five years to ten years	36,225		36,473
	$	111,584	$	114,254
Mortgage-backed securities and collateralized mortgage obligations	1,638,630		1,650,612
	$	1,750,214	$	1,764,866

    Mortgage-backed securities and collateralized mortgage obligations totaling $1.6 billion at amortized cost, and $1.7 billion at fair value, are not classified by maturity in the table above as their expected lives are likely to be shorter than the contractual maturity date due to principal prepayments.

    During the three months ended September 30, 2021, the sales of debt securities available for sale totaled $22.5 million, resulting in a gross gains of $2.0 million and no gross losses. Proceeds from called debt securities available for sale totaled $9.0 million, resulting in no gross gains or losses. No debt securities available for sale matured during the quarter.

During the nine months ended September 30, 2021, the sale of debt securities available for sale totaled $27.2 million, resulting in a gross gains of $2.0 million and gross losses of $281,000. Proceeds from called debt securities available for sale totaled $14.0 million, resulting in no gross gains or losses. Proceeds from matured debt securities available for sale totaled $210,000.

    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, the sale of debt securities available for sale totaled $20.8 million, resulting in gross gains of $369,000. Proceeds from called debt securities available for sale totaled $6.6 million, resulting in $1,000 of gross gains. Proceeds from matured debt securities available for sale totaled $5.8 million.

Debt securities available for sale having a carrying value of $567.8 million and $822.2 million, at September 30, 2021 and December 31, 2020, 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, 2021 and December 31, 2020 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

6.    Debt Securities Available for Sale (continued)    

	September 30, 2021
	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	$	9,804	$	(97)	$	—	$	—	$	9,804	$	(97)
Mortgage-backed securities and collateralized mortgage obligations	694,865		(8,178)		61,308		(917)		756,173		(9,095)
Corporate debt securities	4,996		(4)		4,775		(225)		9,771		(229)
	$	709,665	$	(8,279)	$	66,083	$	(1,142)	$	775,748	$	(9,421)

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

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, 2021, 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, 2021 totaled 83, compared with 40 at December 31, 2020. All temporarily impaired securities were investment grade as of September 30, 2021 and December 31, 2020.

    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, 2021 and 2020.

Debt Securities Held to Maturity

    Debt securities held to maturity at September 30, 2021 and December 31, 2020 are summarized as follows:

	September 30, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
	(In thousands)
U.S. government and agency obligations	$	44,870	$	—	$	(489)	$	44,381
Mortgage-backed securities and collateralized mortgage obligations	363,218		10,088		(419)		372,887
	$	408,088	$	10,088	$	(908)	$	417,268

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

The amortized cost and fair value of debt securities held to maturity at September 30, 2021, 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, 2021
	Amortized Cost		Fair Value
	(In thousands)
More than one year to five years	$	14,875	$	14,857
More than five years to ten years	19,995		19,685
More than ten years	10,000		9,839
	44,870		44,381
Mortgage-backed securities and collateralized mortgage obligations	363,218		372,887
	$	408,088	$	417,268

Mortgage-backed securities and collateralized mortgage obligations totaling $363.2 million at amortized cost, and $372.9 million at fair value at September 30, 2021, 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, 2021, there were no sales or maturities of debt securities held to maturity. During the nine months ended September 30, 2021, proceeds from called debt securities held to maturity totaled $5.1 million, resulting in no gross gains or losses.

    During the three and nine months ended September 30, 2020, there were no sales or maturities of debt securities held to maturity. During the three and nine months ended September 30, 2020, proceeds from called debt securities held to maturity totaled $20.0 million, resulting in no gross gains or losses.

7.    Debt Securities Held to Maturity (continued)

Debt securities held to maturity having a carrying value of $256.9 million and $220.5 million, at September 30, 2021 and December 31, 2020, 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, 2021 and December 31, 2020 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	September 30, 2021
	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	$	44,381	$	(489)	$	—	$	—	$	44,381	$	(489)
Mortgage-backed securities and collateralized mortgage obligations	18,804		(419)		—		—		18,804		(419)
	$	63,185	$	(908)	$	—	$	—	$	63,185	$	(908)

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

    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, 2021, 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, 2021 totaled ten, compared with two at December 31, 2020. All temporarily impaired securities were investment grade as of September 30, 2021 and December 31, 2020.

    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, 2021 and 2020.

Equity Securities at Fair Value

    The Company has an equity securities portfolio which consists of stock in other financial institutions, a payment technology company, a community bank correspondent services company, and preferred stock in U.S. Government agencies which are reported at fair value on the Company's Consolidated Statements of Financial Condition. The fair value of the equities portfolio at September 30, 2021 and December 31, 2020 was $2.8 million and $5.4 million, respectively.

    The Company recorded a net (decrease) in the fair value of equity securities of $(443,000) and $(1.8) million, during the three and nine months ended September 30, 2021, respectively, as a component of non-interest income. During the three and nine months ended September 30, 2020, the Company recorded a net (decrease) increase in the fair value of equity securities of $(4,000) and $55,000, respectively, as a component of non-interest income.

    During the three and nine months ended September 30, 2021, sales of equity securities totaled $1.3 million, resulting in gross gains of $344,000 and no gross losses. During the three and nine months ended September 30, 2020, there were no sales of equity securities.

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Loans Receivable and Allowance for Loan Losses

9 Months Ended

Sep. 30, 2021

Receivables [Abstract]

Loans Receivable and Allowance for Loan Losses

Loans Receivable and Allowance for Loan Losses

    Loans receivable at September 30, 2021 and December 31, 2020 are summarized as follows:

	September 30,		December 31,
	2021		2020
	(In thousands)
Real estate loans:
One-to-four family	$	1,933,876	$	1,940,327
Multifamily and commercial	3,137,461		2,817,965
Construction	272,004		328,711
Commercial business loans	450,021		752,870
Consumer loans:
Home equity loans and advances	264,111		321,177
Other consumer loans	1,772		1,497
Total gross loans	6,059,245		6,162,547
Purchased credit-impaired ("PCI") loans	2,994		6,345
Net deferred loan costs, fees and purchased premiums and discounts	22,055		12,878
Loans receivable	$	6,084,294	$	6,181,770

    The Company had no loans held-for-sale at September 30, 2021. The Company had $4.1 million of SBA loans held-for-sale at December 31, 2020. During the three months ended September 30, 2021, the Company sold $1.8 million, $15.0 million, and $1.2 million of one-to-four family real estate loans and home equity loans, multifamily and commercial real estate loans, and SBA loans held-for-sale included in commercial business loans, respectively, resulting in gross gains of $140,000 and no gross losses. During the nine months ended September 30, 2021, the Company sold $17.4 million, $19.1 million, $250.1 million, and $6.4 million of one-to-four family real estate loans and home equity loans, multifamily and commercial real estate loans, commercial business and SBA loans, and construction loans held-for-sale, respectively, resulting in gross gains of $8.6 million and no gross losses.

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 and nine months ended September 30, 2021, no loans included in loans receivable were sold by the Company. During the three months ended September 30, 2020, the Company sold a construction loan totaling $5.8 million included in loans receivable, resulting in no gross gain or loss. During the three months ended September 30, 2020, the Company sold an SBA 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, $12.5 million, and $7.6 million of one-to-four family real estate and home equity loans, construction loans, and commercial business and SBA loans, respectively, included in loans receivable, resulting in gross gains of $82,000, $0, and $78,000, respectively, and no gross losses.

    During the three months ended September 30, 2021, the Company purchased $678,000 of one-to-four family real estate loans and $2.0 million of multifamily and commercial real estate loans from third parties. During the nine months ended September 30, 2021, the Company purchased $678,000 of one-to-four family real estate loans and $73.6 million of multifamily and commercial real estate loans from third parties. During the three and nine months ended September 30, 2020, no loans were purchased by the Company.

At September 30, 2021 and December 31, 2020, commercial business loans included $69.2 million and $344.4 million, respectively, in SBA Payroll Protection Program ("PPP") loans and net deferred fees related to these loans totaling $1.9 million and $6.6 million, respectively.

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 months ended September 30, 2021, no loans were exchanged for Freddie Mac mortgage participation certificates. During the nine months ended September 30, 2021, the Company exchanged $99.6 million of loans for Freddie Mac mortgage participation certificates, resulting in gross gains of $2.3 million and no gross losses. During the three and nine months ended September 30, 2020, $48.5 million of loans were exchanged for Freddie Mac mortgage participation certificates, resulting in gross gains of $1.5 million and no gross losses. The Company retained the servicing of these loans.

At September 30, 2021 and December 31, 2020, the carrying value of loans serviced by the Company for investors was $551.1 million and $598.0 million, respectively. These loans are not included in the Consolidated Statements of Financial Condition.

    The following tables summarize the aging of loans receivable by portfolio segment, including non-accrual loans and excluding PCI loans at September 30, 2021 and December 31, 2020:

	September 30, 2021
	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	$	1,274	$	1,370	$	968	$	3,612	$	1,991	$	1,930,264	$	1,933,876
Multifamily and commercial	486		1,740		2,433		4,659		2,433		3,132,802		3,137,461
Construction	107		—		—		107		—		271,897		272,004
Commercial business loans	225		400		493		1,118		523		448,903		450,021
Consumer loans:
Home equity loans and advances	174		125		59		358		319		263,753		264,111
Other consumer loans	—		—		—		—		—		1,772		1,772
Total loans	$	2,266	$	3,635	$	3,953	$	9,854	$	5,266	$	6,049,391	$	6,059,245

	December 31, 2020
	30-59 Days		60-89 Days		90 Days or More		Total Past Due		Non-accrual		Current		Total
	(In thousands)
Real estate loans:
One-to-four family	$	3,068	$	912	$	1,901	$	5,881	$	2,637	$	1,934,446	$	1,940,327
Multifamily and commercial	15,645		—		1,238		16,883		1,873		2,801,082		2,817,965
Construction	550		—		—		550		—		328,161		328,711
Commercial business loans	2,343		1,056		2,453		5,852		2,968		747,018		752,870
Consumer loans:
Home equity loans and advances	1,156		696		394		2,246		678		318,931		321,177
Other consumer loans	4		—		—		4		—		1,493		1,497
Total loans	$	22,766	$	2,664	$	5,986	$	31,416	$	8,156	$	6,131,131	$	6,162,547

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

    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, 2021 and December 31, 2020, non-accrual loans totaled $5.3 million and $8.2 million, respectively. Included in non-accrual loans at September 30, 2021, are thirteen loans totaling $1.3 million which are less than 90 days in arrears. At December 31, 2020, 19 loans totaling $2.2 million were less than 90 days in arrears.

    At September 30, 2021 and December 31, 2020, there were no loans past due 90 days or more still accruing interest other than COVID-19 related loan forbearance and deferrals. In accordance with the CARES Act, these loans are not included in the aging of loans receivable by portfolio segment in the table above, and the Bank continues to accrue interest income during the forbearance or deferral period. If adverse information indicating that the borrower's capability of repaying all amounts due is unlikely, the interest accrual will cease.

PCI loans are loans acquired at a discount primarily due to deteriorated credit quality. These loans are initially recorded at fair value at 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 $2.8 million at September 30, 2021 and $6.1 million at December 31, 2020. PCI loans acquired in the Roselle acquisition totaled $184,000 at September 30, 2021 and $246,000 at December 31, 2020.

    The following table presents changes in accretable yield for PCI loans for the three and nine months ended September 30, 2021 and 2020.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Balance at beginning of period	$	375	$	471	$	418	$	511
Acquisition	—		—		—		58
Accretion	(27)		(58)		(91)		(156)
Net change in expected cash flows	4		1		25		1
Balance at end of period	$	352	$	414	$	352	$	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, 2021 and December 31, 2020, the Company had no real estate owned. At September 30, 2021 we had one residential mortgage loan with a carrying value of $86,000 collateralized by residential real estate which was in the process of foreclosure. At December 31, 2020 we had two residential mortgage loans with carrying values totaling $398,000 collateralized by residential real estate which were in the process of foreclosure. In March 2020, the Company temporarily suspended residential property foreclosure sales and evictions in the primary states in which we lend, as the federal government and various states issued executive orders which declared moratoriums on removing individuals from a residential property until at least two months after the COVID-19 health crisis ended. Many of these moratoriums expired in the second and third quarters of 2021. In New Jersey and New York the moratoriums will expire on November 15, 2021 and January 15, 2022, respectively.

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, 2021 and December 31, 2020:

	September 30, 2021
	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	$	264	$	96	$	—	$	14	$	5	$	—	$	379
Collectively evaluated for impairment	14,524		26,137		9,482		18,711		1,087		6		69,947
Loans acquired with deteriorated credit quality	—		—		—		—		—		—		—
Total	$	14,788	$	26,233	$	9,482	$	18,725	$	1,092	$	6	$	70,326
Total loans:
Individually evaluated for impairment	$	5,471	$	18,210	$	—	$	2,089	$	727	$	—	$	26,497
Collectively evaluated for impairment	1,928,405		3,119,251		272,004		447,932		263,384		1,772		6,032,748
Loans acquired with deteriorated credit quality	233		1,779		—		982		—		—		2,994
Total loans	$	1,934,109	$	3,139,240	$	272,004	$	451,003	$	264,111	$	1,772	$	6,062,239

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

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

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

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

    The following tables present the number of loans modified as TDRs during the three and nine months ended September 30, 2021 and 2020, 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.

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

	For the Three Months Ended September 30,
	2021					2020
	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:
One-to-four family	1	$	64	$	66	—	$	—	$	—
Multifamily and commercial	—	—		—		4	16,387		16,387
Commercial business loans	—	—		—		1	1,295		1,295
Total restructured loans	1	$	64	$	66	5	$	17,682	$	17,682

	For the Nine Months Ended September 30,
	2021					2020
	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:
One-to-four family	2	$	285	$	388	—	$	—	$	—
Multifamily and commercial	1	192		211		4	16,387		16,387
Commercial business loans	—	—		—		2	11,507		12,802
Total restructured loans	3	$	477	$	599	6	$	27,894	$	29,189

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, 2021 and 2020 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)
2021
Balance at beginning of period	$	17,108	$	26,256	$	9,160	$	15,898	$	1,471	$	5	$	69,898
Provision charged (credited)	(2,218)		(317)		322		2,854		(165)		4		480
Recoveries	4		294		—		42		7		—		347
Charge-offs	(106)		—		—		(69)		(221)		(3)		(399)
Balance at end of period	$	14,788	$	26,233	$	9,482	$	18,725	$	1,092	$	6	$	70,326
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

	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)
2021
Balance at beginning of period	$	13,586	$	30,681	$	11,271	$	17,384	$	1,748	$	6	$	74,676
Provision charged (credited)	1,796		(5,117)		(1,790)		2,945		(400)		5		(2,561)
Recoveries	18		1,231		1		169		52		—		1,471
Charge-offs	(612)		(562)		—		(1,773)		(308)		(5)		(3,260)
Balance at end of period	$	14,788	$	26,233	$	9,482	$	18,725	$	1,092	$	6	$	70,326
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

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, 2021 and December 31, 2020:

	At September 30, 2021
	Recorded Investment		Unpaid Principal Balance		Specific Allowance
	(In thousands)
With no allowance recorded:
Real estate loans:
One-to-four family	$	2,533	$	2,533	$	—
Multifamily and commercial	16,223		16,223		—
Commercial business loans	591		591		—
Consumer loans:
Home equity loans and advances	521		521		—
	19,868		19,868		—
With a specific allowance recorded:
Real estate loans:
One-to-four family	2,938		2,938		264
Multifamily and commercial	1,987		1,987		96
Commercial business loans	1,498		1,497		14
Consumer loans:
Home equity loans and advances	206		206		5
	6,629		6,628		379
Total:
Real estate loans:
One-to-four family	5,471		5,471		264
Multifamily and commercial	18,210		18,210		96
Commercial business loans	2,089		2,088		14
Consumer loans:
Home equity loans and advances	727		727		5
Total loans	$	26,497	$	26,496	$	379

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

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

    Specific allocations of the allowance for loan losses attributable to impaired loans totaled $379,000 and $1.1 million at September 30, 2021 and December 31, 2020, respectively. At September 30, 2021 and December 31, 2020, impaired loans for which there was no related allowance for loan losses totaled $19.9 million and $19.1 million, respectively.

    The recorded investment in TDRs totaled $23.5 million at September 30, 2021, of which one loan with a balance of $45,000 was 30-59 days past due, and one loan with a balance of $400,000 was 60-89 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, 2021. The recorded investment in TDRs totaled $45.4 million at December 31, 2020, of which one loan with a balance of $91,000 was over 90 days past due, and three loans totaling $11.9 million were 30-59 days past due. The remaining loans modified were current at the time of restructuring and have complied with the terms of their restructure agreement at December 31, 2020.

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, 2021 and 2020:

	For the Three Months Ended September 30,
	2021				2020
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(In thousands)
Real estate loans:
One-to-four family	$	5,569	$	64	$	8,020	$	74
Multifamily and commercial	26,103		227		23,525		227
Commercial business loans	2,106		36		4,979		52
Consumer loans:
Home equity loans and advances	1,101		11		1,935		28
Total loans	$	34,879	$	338	$	38,459	$	381

	For the Nine Months Ended September 30,
	2021				2020
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(In thousands)
Real estate loans:
One-to-four family	$	5,923	$	229	$	8,175	$	226
Multifamily and commercial	28,246		688		20,670		653
Commercial business loans	2,226		106		5,468		196
Consumer loans:
Home equity loans and advances	1,257		32		1,995		85
Total loans	$	37,652	$	1,055	$	36,308	$	1,160

    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, 2021 and December 31, 2020:

	September 30, 2021
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Pass	$	1,927,870	$	3,052,850	$	271,897	$	427,793	$	263,650	$	1,772	$	5,945,832
Special mention	388		52,562		107		9,787		—		—		62,844
Substandard	5,618		32,049		—		12,441		461		—		50,569
Doubtful	—		—		—		—		—		—		—
Loss	—		—		—		—		—		—		—
Total	$	1,933,876	$	3,137,461	$	272,004	$	450,021	$	264,111	$	1,772	$	6,059,245

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

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Leases

9 Months Ended

Sep. 30, 2021

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. The Company's leases primarily relate to real estate property for branches and office space. At September 30, 2021 and December 31, 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 3 years to 10 years. For each lease, these extension options were evaluated, and those which were considered reasonably certain of renewal were included in the lease term.

    At September 30, 2021 and December 31, 2020, the weighted average remaining lease term for operating leases was 6.9 years and 7.5 years, respectively, and the weighted average discount rate used in the measurement of operating lease liabilities was 2.14%, and 2.26%, respectively.

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 months ended September 30, 2021 and 2020, operating and variable lease expenses totaled approximately $504,000 and $603,000, respectively. During the nine months ended September 30, 2021 and 2020, operating and variable lease expenses totaled approximately $1.7 million 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, 2021 and 2020. At September 30, 2021, 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, 2021	Lease Payment Obligations
	(In thousands)
One year or less	$	1,026
After one year to two years	4,008
After two years to three years	3,739
After three years to four years	3,014
After four years to five years	2,342
Thereafter	6,662
Total undiscounted cash flows	20,791
Discount on cash flows	(1,663)
Total lease liability	$	19,128

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Deposits

9 Months Ended

Sep. 30, 2021

Deposits [Abstract]

Deposits

Deposits

    Deposits at September 30, 2021 and December 31, 2020 are summarized as follows:

	September 30,		December 31,
	2021		2020
	(In thousands)
Non-interest-bearing demand	$	1,567,112	$	1,354,605
Interest-bearing demand	2,451,718		2,189,164
Money market accounts	636,392		588,180
Savings and club deposits	775,681		688,309
Certificates of deposit	1,791,455		1,958,366
Total deposits	$	7,222,358	$	6,778,624

Included in the above balances at September 30, 2021 and December 31, 2020 are certificates of deposit obtained through brokers, totaling $16.2 million and $26.3 million, respectively, that were acquired from Stewardship.

    The aggregate amount of certificates of deposit that meet or exceed $100,000 totaled approximately $934.9 million and $1.0 billion at September 30, 2021 and December 31, 2020, respectively. Interest expense on deposits for the three months ended September 30, 2021 and 2020 totaled $6.7 million and $12.8 million, respectively. Interest expense on deposits for the nine months ended September 30, 2021 and 2020 totaled $23.4 million and $44.6 million, respectively.

11.    Deposits (continued)

    Scheduled maturities of certificates of deposit accounts at September 30, 2021 and December 31, 2020 are summarized as follows:

	September 30,		December 31,
	2021		2020
	(In thousands)
One year or less	$	1,193,342	$	1,494,129
After one year to two years	365,668		337,579
After two years to three years	120,496		52,809
After three years to four years	29,925		23,018
After four years	82,024		50,831
	$	1,791,455	$	1,958,366

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Stock Based Compensation

9 Months Ended

Sep. 30, 2021

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, 1,389,570 shares of restricted stock were awarded, with a grant date fair value of $15.60 per share. To fund the grant of restricted common stock, the Company issued shares from authorized 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.

On December 14, 2020, 33,160 shares of restricted stock were awarded, with a grant date fair value of $15.08 per share. To fund the grant of restricted common stock, the Company reissued shares from treasury stock.

On March 22, 2021, 50,203 shares of restricted stock were awarded, with a grant date fair value of $17.86 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 1 year to 5 years, beginning 1 year from the date of grant. A portion of restricted shares awarded are performance vesting awards, which may or may not vest depending upon the attainment of certain corporate financial targets. Management recognizes compensation expense for the fair value of restricted shares on a straight line basis over the requisite performance or service period. During both the three months ended September 30, 2021 and 2020, approximately $1.4 million in expense was recognized in regard to these awards. The expected future compensation expense related to the 1,105,634 non-vested restricted shares outstanding at September 30, 2021 is approximately $9.7 million over a weighted average period of 2.1 years. During the nine months ended September 30, 2021 and 2020, approximately $4.3 million and $4.2 million in expense was recognized in regard to these awards.

12.    Stock Based Compensation (continued)

    The following is a summary of the Company's restricted stock activity during the three and nine months ended September 30, 2021 and 2020:

	Number of Restricted Shares	Weighted Average Grant Date Fair Value
Non-vested at January 1, 2021	1,263,169	$	15.66
Grants	50,203	17.86
Forfeited	(13,846)	15.60
Non-vested at March 31, 2021	1,299,526	$	15.74
Forfeited	(128)	15.60
Non-vested at June 30, 2021	1,299,398	$	15.74
Vested	(163,882)	15.61
Forfeited	(29,882)	15.63
Non-vested at September 30, 2021	1,105,634	$	15.76

	Number of Restricted Shares	Weighted Average Grant Date Fair Value
Non-vested at January 1, 2020	1,420,012	$	15.67
Forfeited	(881)	15.60
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

On July 23, 2019, options to purchase 3,707,901 shares of Company common stock were awarded with a grant date fair value of $4.25 per option. Stock options granted under the 2019 Plan vest in equal installments over the service period of five years beginning one year from the date of grant. Stock options were granted at an exercise price of $15.60, which represents the fair value of the Company's common stock price on the grant date based on the closing market price, and have an expiration period of 10 years. The fair value of stock options granted was estimated utilizing the Black-Scholes option pricing model using the following assumptions: expected life of 6.5 years, risk-free rate of return of 1.90%, volatility of 22.12%, and a dividend yield of 0.00%.

     On December 16, 2019, options to purchase 184,378 shares of Company common stock were awarded with a grant date fair value of $4.59 per option. Stock options granted under the 2019 Plan generally vest in equal installments over the service period of five years beginning one year from the date of grant. Stock options were granted at an exercise price of $17.00, which represents the fair value of the Company's common stock price on the grant date based on the closing market price, and have an expiration period of approximately 10 years. The fair value of stock options granted was estimated utilizing the Black-Scholes option pricing model using the following assumptions: expected life of 6.5 years, risk-free rate of return of 1.79%, volatility of 22.23%, and a dividend yield of 0.00%.

12.    Stock Based Compensation (continued)

On March 22, 2021, options to purchase 109,654 shares of Company common stock were awarded with a grant date fair value of $4.91 per option. Stock options granted under the 2019 Plan vest in equal installments over the service period of three years beginning one year from the date of grant. Stock options were granted at an exercise price of $17.86, 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 6.0 years, risk-free rate of return of 1.11%, volatility of 25.98%, 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 Company stock plus 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 months ended September 30, 2021 and 2020, approximately $822,000 and $808,000 in expense was recognized in regard to these awards. During the nine months ended September 30, 2021 and 2020, approximately $2.4 million and $2.4 million in expense was recognized in regard to these awards. The expected future compensation expense related to the 2,278,056 non-vested options outstanding at September 30, 2021 is $9.0 million over a weighted average period of 2.8 years.

    The following is a summary of the Company's option activity during the three and nine months ended September 30, 2021 and 2020:

	Number of Stock Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding, January 1, 2021	3,708,628	$	15.66	8.6	$	—
Granted	109,654	17.86		—	—
Expired	(2,029)	15.60		—	—
Forfeited	(30,118)	15.60		—	—
Outstanding, March 31, 2021	3,786,135	$	15.73	8.4	$	6,673,328
Exercised	(1,661)	15.60		—	—
Expired	(7,529)	15.60		—	—
Forfeited	(1,412)	15.60		—	—
Outstanding, June 30, 2021	3,775,533	$	15.73	8.1	$	5,700,258
Exercised	(26,861)	15.60		—	—
Expired	(353)	15.60		—	—
Forfeited	(58,287)	15.73		—	—
Outstanding, September 30, 2021	3,690,032	$	15.73	7.9	$	10,222,527
Options exercisable at September 30, 2021	1,411,976	$	15.64	7.8	$	4,036,196

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, 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	$	—

    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.

    During the three and nine months ended September 30, 2021, the aggregate intrinsic value of options exercised was $56,186 and $59,991, respectively. There were no stock option exercises during the three and nine months ended September 30, 2020.

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Components of Net Periodic Benefit Costs

9 Months Ended

Sep. 30, 2021

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.

13.    Components of Net Periodic Benefit Cost (continued)

    Net periodic benefit (income) cost for Pension Plan, RIM Plan, Post-retirement Plan and Split-dollar Life Insurance plan benefits for the three and nine months ended September 30, 2021 and 2020, includes the following components:

	For the Three Months Ended September 30,
	Pension Plan				RIM Plan				Post-retirement Plan				Split-Dollar Life Insurance
	2021		2020		2021		2020		2021		2020		2021		2020		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	1,872	$	2,032	$	100	$	67	$	130	$	99	$	141	$	120	Compensation and employee benefits
Interest cost	1,902		1,824		86		102		141		171		125		135		Other non-interest expense
Expected return on plan assets	(6,661)		(5,908)		—		—		—		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		—		—		—		14		14		Other non-interest expense
Net loss	—		1,492		166		99		153		77		191		113		Other non-interest expense
Net periodic (income) benefit cost	$	(2,887)	$	(560)	$	352	$	268	$	424	$	347	$	471	$	382

	For the Nine Months Ended September 30,
	Pension Plan				RIM Plan				Post-retirement Plan				Split-Dollar Life Insurance
	2021		2020		2021		2020		2021		2020		2021		2020		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	6,172	$	5,906	$	300	$	201	$	390	$	297	$	423	$	346	Compensation and employee benefits
Interest cost	5,414		5,887		258		306		423		513		375		384		Other non-interest expense
Expected return on plan assets	(19,297)		(17,383)		—		—		—		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		—		—		—		42		42		Other non-interest expense
Net loss	2,000		3,054		498		297		459		231		573		339		Other non-interest expense
Net periodic (income) benefit cost	$	(5,711)	$	(2,536)	$	1,056	$	804	$	1,272	$	1,041	$	1,413	$	1,111

For the three and nine months ended September 30, 2021, a $35.0 million contribution was made to the Pension Plan. The net periodic (income) cost for pension benefits, other post-retirement and split dollar life insurance benefits for the three and nine months ended September 30, 2021 were calculated using the most recent available benefit valuations.

13.    Components of Net Periodic Benefit Cost (continued)

    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, 2021 and 2020, the Company recorded a net periodic benefit cost of $2,000 and $4,000, and $6,000 and $8,000, respectively, in connection with this plan.

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Fair Value Measurements

9 Months Ended

Sep. 30, 2021

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, 2021 and December 31, 2020.

14.    Fair Value Measurements (continued)

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. 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 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.

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, 2021 and December 31, 2020, by level within the fair value hierarchy:

	September 30, 2021
			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	$	39,303	$	35,194	$	4,109	$	—
Mortgage-backed securities and collateralized mortgage obligations	1,650,612		—		1,650,612		—
Municipal obligations	10,210		—		10,210		—
Corporate debt securities	64,741		—		64,741		—
Trust preferred securities	—		—		—		—
Total debt securities available for sale	1,764,866		35,194		1,729,672		—
Equity securities	2,785		2,439		346		—
Derivative assets	11,464		—		11,464		—
	$	1,779,115	$	37,633	$	1,741,482	$	—
Derivative liabilities	$	25,068	$	—	$	25,068	$	—

	December 31, 2020
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Debt securities available for sale:
U.S. government and agency obligations	$	25,549	$	25,549	$	—	$	—
Mortgage-backed securities and collateralized mortgage obligations	1,200,394		—		1,200,394		—
Municipal obligations	16,862		—		16,862		—
Corporate debt securities	69,477		—		69,477		—
Trust preferred securities	4,670		—		4,670		—
Total debt securities available for sale	1,316,952		25,549		1,291,403		—
Equity securities	5,418		5,072		346
Derivative assets	19,425		—		19,425		—
	$	1,341,795	$	30,621	$	1,311,174	$	—
Derivative liabilities	$	42,384	$	—	$	42,384	$	—

14.    Fair Value Measurements (continued)

There were no Level 3 assets measured at fair value on a recurring basis at September 30, 2021 and December 31, 2020.

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, 2021 and December 31, 2020.

Impaired Loans

    Loans which meet certain criteria are evaluated individually for impairment. Loan impairment is measured based on the present value of expected future cash flows discounted at the loan's effective interest rate or, as a practical expedient, at the loan's observable market price or the fair value of the collateral if the loan is collateral dependent. 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.

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, 2021 and December 31, 2020, by level within the fair value hierarchy:

	September 30, 2021
			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	$	1,213	$	—	$	—	$	1,213
Mortgage servicing rights	2,057		—		—		2,057
	$	3,270	$	—	$	—	$	3,270

	December 31, 2020
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Mortgage servicing rights	$	1,338	$	—	$	—	$	1,338
	$	1,338	$	—	$	—	$	1,338

14.    Fair Value Measurements (continued)

The following table presents information for Level 3 assets measured at fair value on a non-recurring basis at September 30, 2021 and December 31, 2020:

	September 30, 2021
	Fair Value		Valuation Methodology	Unobservable Inputs	Range of Inputs		Weighted Average
	(Dollars in thousands)
Impaired loans	$	1,213	Other	Contracted sale price of collateral	—	%	—	%
Mortgage servicing rights	2,057		Discounted cash flow	Prepayment speeds and discount rates (1)	7.5% - 25.0%		12.3	%

	December 31, 2020
	Fair Value		Valuation Methodology	Unobservable Inputs	Range of Inputs	Weighted Average
	(Dollars in thousands)
Mortgage servicing rights	$	1,338	Discounted cash flow	Prepayment speeds and discount rates (1)	9.7% - 26.2%	16.7	%
(1) 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.

14.    Fair Value Measurements (continued)

The Company also holds debt instruments issued by the U.S. government and U.S. government-sponsored agencies that are traded in active markets with readily accessible quoted market prices that are considered Level 1 inputs within the fair value hierarchy.

Federal Home Loan Bank Stock ("FHLB")

    The fair value of FHLB stock is based on redemption at par value and can only be sold to the issuing FHLB, to other FHLBs, or to other member banks. As such, the Company's FHLB stock is recorded at cost, or par value, and is evaluated for impairment each reporting period by considering the ultimate recoverability of the investment rather than temporary declines in value. The Company classifies the estimated fair value as Level 2 within the fair value hierarchy.

Loans Receivable

    Fair values are estimated for portfolios of loans with similar financial characteristics. Loans are segregated by type such as commercial mortgage, residential mortgage, commercial, construction, and consumer and other. Each loan category is further segmented into fixed and adjustable rate interest terms and into performing and non-performing categories.

    The fair value of performing loans was estimated using a combination of techniques, including a discounted cash flow model that utilizes a discount rate that reflects the Company's current pricing for loans with similar characteristics and remaining maturity, adjusted by an amount for estimated credit losses inherent in the portfolio at the balance sheet date. The rates take into account the expected yield curve, as well as an adjustment for prepayment risk, when applicable. The Company classifies the estimated fair value of its loan portfolio as Level 3.

    The fair value for 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, 2021 and December 31, 2020:

	September 30, 2021
			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	$	298,488	$	298,488	$	298,488	$	—	$	—
Debt securities available for sale	1,764,866		1,764,866		35,194		1,729,672		—
Debt securities held to maturity	408,088		417,268		—		417,268		—
Equity securities	2,785		2,785		2,439		346		—
Federal Home Loan Bank stock	40,891		40,891		—		40,891		—
Loans receivable, net	6,013,968		6,230,842		—		—		6,230,842
Derivative assets	11,464		11,464		—		11,464		—
Financial liabilities:
Deposits	$	7,222,358	$	7,224,770	$	—	$	7,224,770	$	—
Borrowings	749,631		753,800		—		753,800		—
Derivative liabilities	25,068		25,068		—		25,068		—

	December 31, 2020
			Fair Value Measurements
	Carrying Value		Total Fair Value		Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
	(In thousands)
Financial assets:
Cash and cash equivalents	$	422,957	$	422,957	$	422,957	$	—	$	—
Debt securities available for sale	1,316,952		1,316,952		25,549		1,291,403		—
Debt securities held to maturity	262,720		277,091		5,001		272,090		—
Equity securities	5,418		5,418		5,072		346		—
Federal Home Loan Bank stock	43,759		43,759		—		43,759		—
Loans receivable, net	6,107,094		6,394,524		—		—		6,394,524
Derivative assets	19,425		19,425		—		19,425		—
Financial liabilities:
Deposits	$	6,778,624	$	6,793,034	$	—	$	6,793,034	$	—
Borrowings	799,364		808,853		—		808,853		—
Derivative liabilities	42,384		42,384		—		42,384		—

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, 2021

Equity [Abstract]

Other Comprehensive Income (Loss)

Other Comprehensive Income (Loss)

    The following tables present the components of other comprehensive income (loss), both gross and net of tax, for the three and nine months ended September 30, 2021 and 2020:

	For the Three Months Ended September 30,
	2021						2020
	Before Tax		Tax Effect		After Tax		Before Tax		Tax Effect		After Tax
	(In thousands)
Components of other comprehensive income (loss):
Unrealized (loss) on debt securities available for sale:	$	(13,609)	$	3,666	$	(9,943)	$	(3,688)	$	775	$	(2,913)
Accretion of unrealized (loss) on debt securities reclassified as held to maturity	(3)		1		(2)		(4)		—		(4)
Reclassification adjustment for gain included in net income	2,296		(505)		1,791		—		—		—
	(11,316)		3,162		(8,154)		(3,692)		775		(2,917)
Derivatives:
Unrealized gain on swap contracts accounted for as cash flow hedges	2,035		(568)		1,467		2,256		(471)		1,785
	2,035		(568)		1,467		2,256		(471)		1,785
Employee benefit plans:
Amortization of prior service cost included in net income	(14)		4		(10)		(14)		3		(11)
Reclassification adjustment of actuarial net (loss) included in net income	(1,511)		422		(1,089)		(1,071)		225		(846)
Change in funded status of retirement obligations	3,050		(852)		2,198		(41,434)		8,701		(32,733)
	1,525		(426)		1,099		(42,519)		8,929		(33,590)
Total other comprehensive income (loss)	$	(7,756)	$	2,168	$	(5,588)	$	(43,955)	$	9,233	$	(34,722)

15.    Other Comprehensive Income (Loss) (continued)

	For the Nine Months Ended September 30,
	2021						2020
	Before Tax		Tax Effect		After Tax		Before Tax		Tax Effect		After Tax
	(In thousands)
Components of other comprehensive income (loss):
Unrealized (loss) gain on debt securities available for sale:	$	(26,804)	$	4,615	$	(22,189)	$	28,736	$	(6,031)	$	22,705
Accretion of unrealized (loss) gain on debt securities reclassified as held to maturity	(24)		24		—		1		—		1
Reclassification adjustment for (loss) gain included in net income	2,015		(426)		1,589		370		(81)		289
	(24,813)		4,213		(20,600)		29,107		(6,112)		22,995
Derivatives:
Unrealized gain (loss) on swap contracts accounted for as cash flow hedges	9,182		(1,084)		8,098		(13,050)		2,736		(10,314)
	9,182		(1,084)		8,098		(13,050)		2,736		(10,314)
Employee benefit plans:
Amortization of prior service cost included in net income	(42)		11		(31)		(42)		10		(32)
Reclassification adjustment of actuarial net (loss) included in net income	(4,533)		1,266		(3,267)		(3,213)		674		(2,539)
Change in funded status of retirement obligations	40,541		(3,971)		36,570		(37,093)		7,789		(29,304)
	35,966		(2,694)		33,272		(40,348)		8,473		(31,875)
Total other comprehensive income (loss)	$	20,335	$	435	$	20,770	$	(24,291)	$	5,097	$	(19,194)

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, 2021 and 2020:

	For the Three Months Ended September 30,
	2021								2020
	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	$	18,582	$	(10,225)	$	(51,624)	$	(43,267)	$	35,225	$	(20,573)	$	(67,859)	$	(53,207)
Current period changes in other comprehensive income (loss)	(8,154)		1,467		1,099		(5,588)		(2,917)		1,785		(33,590)		(34,722)
Total other comprehensive income (loss)	$	10,428	$	(8,758)	$	(50,525)	$	(48,855)	$	32,308	$	(18,788)	$	(101,449)	$	(87,929)

	For the Nine Months Ended September 30,
	2021								2020
	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	$	31,028	$	(16,856)	$	(83,797)	$	(69,625)	$	9,313	$	(8,474)	$	(69,574)	$	(68,735)
Current period changes in other comprehensive income (loss)	(20,600)		8,098		33,272		20,770		22,995		(10,314)		(31,875)		(19,194)
Total other comprehensive income (loss)	$	10,428	$	(8,758)	$	(50,525)	$	(48,855)	$	32,308	$	(18,788)	$	(101,449)	$	(87,929)

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, 2021 and 2020:

	Accumulated Other Comprehensive Income (Loss) Components
	For the Three Months Ended September 30,				Affected Line Items in the Consolidated Statements of Income
	2021		2020
	(In thousands)
Reclassification adjustment for gain included in net income	$	2,296	$	—	Gain on securities transactions
Reclassification adjustment of actuarial net (loss) included in net income	(1,511)		(1,071)		Other non-interest expense
Total before tax	785		(1,071)
Income (tax) benefit	(83)		225
Net of tax	$	702	$	(846)

	Accumulated Other Comprehensive Income (Loss) Components
	For the Nine Months Ended September 30,				Affected Line Items in the Consolidated Statements of Income
	2021		2020
	(In thousands)
Reclassification adjustment for gain included in net income	$	2,015	$	370	Gain on securities transactions
Reclassification adjustment of actuarial net (loss) included in net income	(4,533)		(3,213)		Other non-interest expense
Total before tax	(2,518)		(2,843)
Income (tax) benefit	840		593
Net of tax	$	(1,678)	$	(2,250)

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Derivatives and Hedging Activities

9 Months Ended

Sep. 30, 2021

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, 2021 and December 31, 2020, the Company had no currency forward contracts in place with commercial banking customers.

    Interest Rate Swaps. At both September 30, 2021 and December 31, 2020, the Company had interest rate swaps in place with 50 commercial banking customers executed by offsetting interest rate swaps with third parties, with an aggregated notional amount of $180.1 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, 2021 and December 31, 2020, the Company had 28 and 31 interest rate swaps with notional amounts of $400.0 million and $430.0 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, 2021 and 2020, 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, 2021 and December 31, 2020:

	September 30, 2021
	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	$	11,464	Other Liabilities	$	25,068
Total derivative instruments		$	11,464		$	25,068

	December 31, 2020
	Asset Derivative			Liability Derivative
	Consolidated Statements of Financial Condition	Fair Value		Consolidated Statements of Financial Condition	Fair Value
		(In thousands)
Derivatives:
Interest rate swaps	Other Assets	$	19,425	Other Liabilities	$	42,384
Total derivative instruments		$	19,425		$	42,384

    For the three months ended September 30, 2021 and 2020, losses/(gains) of $12,000 and $(44,000), respectively, were recorded for changes in fair value of interest rate swaps with third parties. For the nine months ended September 30, 2021 and 2020, (gains)/losses of $(189,000) and $406,000, respectively, were recorded for changes in fair value of interest rate swaps with third parties.

    At both September 30, 2021 and December 31, 2020, accrued interest was $1.0 million.

    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, 2021, the termination value of derivatives in a net liability position, which includes accrued interest, was $12.6 million. The Company has collateral posting thresholds with certain of its derivative counterparties, and has posted collateral of $24.1 million against its obligations under these agreements.

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Revenue Recognition

9 Months Ended

Sep. 30, 2021

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.

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, 2021 and 2020.

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Non-interest income
In-scope of Topic 606:
Demand deposit account fees	$	986	$	787	$	2,682	$	2,706
Title insurance fees	1,431		1,218		4,554		3,445
Other non-interest income	1,934		1,749		5,633		4,688
Total in-scope non-interest income	4,351		3,754		12,869		10,839
Total out-of-scope non-interest income	4,523		4,155		18,991		10,469
Total non-interest income	$	8,874	$	7,909	$	31,860	$	21,308

    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, 2021
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events    The Company has evaluated events subsequent to September 30, 2021 and through the financial statement issuance date of November 9, 2021. The Company has not identified any material subsequent events that would require adjustment or disclosure in the consolidated financial statements.

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Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2021

Accounting Standards Update and Change in Accounting Principle [Abstract]

Recent Accounting Pronouncements

Accounting Pronouncement Adopted in 2021

    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

5.    Summary of Significant Accounting Policies

Accounting Pronouncement Adopted in 2021 (continued)

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 Company adopted this ASU effective January 1, 2021. The update will be applied on a retrospective basis to disclosures with regard to employee benefit plans. The adoption of this update did not have a significant impact on the Company's consolidated financial statements.

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

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

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

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

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

    Based on several analyses performed, as well as an implementation analysis utilizing existing exposures and forecasts of macroeconomic conditions at September 30, 2021, we currently expect the adoption of ASU 2016-13 will result in a decrease between 15% and 25% in our allowance for loan losses and our reserves for unfunded commitments.

    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 decrease 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

5.    Summary of Significant Accounting Policies

Accounting Pronouncements Not Yet Adopted (continued)

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 as of January 1, 2022, currently the allowance for loan losses, will be reflected as an adjustment, net of tax, to retained earnings.

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. 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 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.

Impaired Loans

    Loans which meet certain criteria are evaluated individually for impairment. Loan impairment is measured based on the present value of expected future cash flows discounted at the loan's effective interest rate or, as a practical expedient, at the loan's observable market price or the fair value of the collateral if the loan is collateral dependent. 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.

14.    Fair Value Measurements (continued)

The Company also holds debt instruments issued by the U.S. government and U.S. government-sponsored agencies that are traded in active markets with readily accessible quoted market prices that are considered Level 1 inputs within the fair value hierarchy.

Federal Home Loan Bank Stock ("FHLB")

    The fair value of FHLB stock is based on redemption at par value and can only be sold to the issuing FHLB, to other FHLBs, or to other member banks. As such, the Company's FHLB stock is recorded at cost, or par value, and is evaluated for impairment each reporting period by considering the ultimate recoverability of the investment rather than temporary declines in value. The Company classifies the estimated fair value as Level 2 within the fair value hierarchy.

Loans Receivable

    Fair values are estimated for portfolios of loans with similar financial characteristics. Loans are segregated by type such as commercial mortgage, residential mortgage, commercial, construction, and consumer and other. Each loan category is further segmented into fixed and adjustable rate interest terms and into performing and non-performing categories.

    The fair value of performing loans was estimated using a combination of techniques, including a discounted cash flow model that utilizes a discount rate that reflects the Company's current pricing for loans with similar characteristics and remaining maturity, adjusted by an amount for estimated credit losses inherent in the portfolio at the balance sheet date. The rates take into account the expected yield curve, as well as an adjustment for prepayment risk, when applicable. The Company classifies the estimated fair value of its loan portfolio as Level 3.

    The fair value for 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.

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, 2021

Business Combination and Asset Acquisition [Abstract]

Schedule of recognized identified assets acquired and liabilities assumed

The following table sets forth assets acquired and liabilities assumed in the Roselle acquisition, 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, 2021

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, 2021 and 2020: 3.        Earnings per Share (continued)

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2021		2020		2021		2020
	(Dollars in thousands, except per share data)
Net income	$	20,982	$	15,087	$	68,715	$	36,949
Shares:
Weighted average shares outstanding - basic	102,977,254		110,983,871		104,486,520		110,177,736
Weighted average dilutive shares outstanding	—		—		—		—
Weighted average shares outstanding - diluted	102,977,254		110,983,871		104,486,520		110,177,736
Earnings per share:
Basic	$	0.20	$	0.14	$	0.66	$	0.34
Diluted	$	0.20	$	0.14	$	0.66	$	0.34

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Debt Securities Available for Sale (Tables)

9 Months Ended

Sep. 30, 2021

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, 2021 and December 31, 2020 are summarized as follows:

	September 30, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
			(In thousands)
U.S. government and agency obligations	$	38,651	$	749	$	(97)	$	39,303
Mortgage-backed securities and collateralized mortgage obligations	1,638,630		21,077		(9,095)		1,650,612
Municipal obligations	10,190		20		—		10,210
Corporate debt securities	62,743		2,227		(229)		64,741
	$	1,750,214	$	24,073	$	(9,421)	$	1,764,866

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

Schedule of securities by contractual maturity

The amortized cost and fair value of debt securities available for sale at September 30, 2021, 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.

6.    Debt Securities Available for Sale (continued)

	September 30, 2021
	Amortized Cost		Fair Value
	(In thousands)
One year or less	$	6,944	$	6,944
More than one year to five years	68,415		70,837
More than five years to ten years	36,225		36,473
	$	111,584	$	114,254
Mortgage-backed securities and collateralized mortgage obligations	1,638,630		1,650,612
	$	1,750,214	$	1,764,866

The amortized cost and fair value of debt securities held to maturity at September 30, 2021, 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, 2021
	Amortized Cost		Fair Value
	(In thousands)
More than one year to five years	$	14,875	$	14,857
More than five years to ten years	19,995		19,685
More than ten years	10,000		9,839
	44,870		44,381
Mortgage-backed securities and collateralized mortgage obligations	363,218		372,887
	$	408,088	$	417,268

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, 2021 and December 31, 2020 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

6.    Debt Securities Available for Sale (continued)    

	September 30, 2021
	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	$	9,804	$	(97)	$	—	$	—	$	9,804	$	(97)
Mortgage-backed securities and collateralized mortgage obligations	694,865		(8,178)		61,308		(917)		756,173		(9,095)
Corporate debt securities	4,996		(4)		4,775		(225)		9,771		(229)
	$	709,665	$	(8,279)	$	66,083	$	(1,142)	$	775,748	$	(9,421)

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

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Debt Securities Held to Maturity (Tables)

9 Months Ended

Sep. 30, 2021

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, 2021 and December 31, 2020 are summarized as follows:

	September 30, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
	(In thousands)
U.S. government and agency obligations	$	44,870	$	—	$	(489)	$	44,381
Mortgage-backed securities and collateralized mortgage obligations	363,218		10,088		(419)		372,887
	$	408,088	$	10,088	$	(908)	$	417,268

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

Schedule of securities by contractual maturity

The amortized cost and fair value of debt securities available for sale at September 30, 2021, 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.

6.    Debt Securities Available for Sale (continued)

	September 30, 2021
	Amortized Cost		Fair Value
	(In thousands)
One year or less	$	6,944	$	6,944
More than one year to five years	68,415		70,837
More than five years to ten years	36,225		36,473
	$	111,584	$	114,254
Mortgage-backed securities and collateralized mortgage obligations	1,638,630		1,650,612
	$	1,750,214	$	1,764,866

The amortized cost and fair value of debt securities held to maturity at September 30, 2021, 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, 2021
	Amortized Cost		Fair Value
	(In thousands)
More than one year to five years	$	14,875	$	14,857
More than five years to ten years	19,995		19,685
More than ten years	10,000		9,839
	44,870		44,381
Mortgage-backed securities and collateralized mortgage obligations	363,218		372,887
	$	408,088	$	417,268

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, 2021 and December 31, 2020 and if the unrealized loss position was continuous for the twelve months prior to those respective dates:

	September 30, 2021
	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	$	44,381	$	(489)	$	—	$	—	$	44,381	$	(489)
Mortgage-backed securities and collateralized mortgage obligations	18,804		(419)		—		—		18,804		(419)
	$	63,185	$	(908)	$	—	$	—	$	63,185	$	(908)

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

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Loans Receivable and Allowance for Loan Losses (Tables)

9 Months Ended

Sep. 30, 2021

Receivables [Abstract]

Schedule of loans receivable

Loans receivable at September 30, 2021 and December 31, 2020 are summarized as follows:

	September 30,		December 31,
	2021		2020
	(In thousands)
Real estate loans:
One-to-four family	$	1,933,876	$	1,940,327
Multifamily and commercial	3,137,461		2,817,965
Construction	272,004		328,711
Commercial business loans	450,021		752,870
Consumer loans:
Home equity loans and advances	264,111		321,177
Other consumer loans	1,772		1,497
Total gross loans	6,059,245		6,162,547
Purchased credit-impaired ("PCI") loans	2,994		6,345
Net deferred loan costs, fees and purchased premiums and discounts	22,055		12,878
Loans receivable	$	6,084,294	$	6,181,770

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, 2021 and December 31, 2020:

	September 30, 2021
	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	$	1,274	$	1,370	$	968	$	3,612	$	1,991	$	1,930,264	$	1,933,876
Multifamily and commercial	486		1,740		2,433		4,659		2,433		3,132,802		3,137,461
Construction	107		—		—		107		—		271,897		272,004
Commercial business loans	225		400		493		1,118		523		448,903		450,021
Consumer loans:
Home equity loans and advances	174		125		59		358		319		263,753		264,111
Other consumer loans	—		—		—		—		—		1,772		1,772
Total loans	$	2,266	$	3,635	$	3,953	$	9,854	$	5,266	$	6,049,391	$	6,059,245

	December 31, 2020
	30-59 Days		60-89 Days		90 Days or More		Total Past Due		Non-accrual		Current		Total
	(In thousands)
Real estate loans:
One-to-four family	$	3,068	$	912	$	1,901	$	5,881	$	2,637	$	1,934,446	$	1,940,327
Multifamily and commercial	15,645		—		1,238		16,883		1,873		2,801,082		2,817,965
Construction	550		—		—		550		—		328,161		328,711
Commercial business loans	2,343		1,056		2,453		5,852		2,968		747,018		752,870
Consumer loans:
Home equity loans and advances	1,156		696		394		2,246		678		318,931		321,177
Other consumer loans	4		—		—		4		—		1,493		1,497
Total loans	$	22,766	$	2,664	$	5,986	$	31,416	$	8,156	$	6,131,131	$	6,162,547

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, 2021 and 2020.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Balance at beginning of period	$	375	$	471	$	418	$	511
Acquisition	—		—		—		58
Accretion	(27)		(58)		(91)		(156)
Net change in expected cash flows	4		1		25		1
Balance at end of period	$	352	$	414	$	352	$	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, 2021 and December 31, 2020:

	September 30, 2021
	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	$	264	$	96	$	—	$	14	$	5	$	—	$	379
Collectively evaluated for impairment	14,524		26,137		9,482		18,711		1,087		6		69,947
Loans acquired with deteriorated credit quality	—		—		—		—		—		—		—
Total	$	14,788	$	26,233	$	9,482	$	18,725	$	1,092	$	6	$	70,326
Total loans:
Individually evaluated for impairment	$	5,471	$	18,210	$	—	$	2,089	$	727	$	—	$	26,497
Collectively evaluated for impairment	1,928,405		3,119,251		272,004		447,932		263,384		1,772		6,032,748
Loans acquired with deteriorated credit quality	233		1,779		—		982		—		—		2,994
Total loans	$	1,934,109	$	3,139,240	$	272,004	$	451,003	$	264,111	$	1,772	$	6,062,239

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

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

The activity in the allowance for loan losses by portfolio segment for the three and nine months ended September 30, 2021 and 2020 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)
2021
Balance at beginning of period	$	17,108	$	26,256	$	9,160	$	15,898	$	1,471	$	5	$	69,898
Provision charged (credited)	(2,218)		(317)		322		2,854		(165)		4		480
Recoveries	4		294		—		42		7		—		347
Charge-offs	(106)		—		—		(69)		(221)		(3)		(399)
Balance at end of period	$	14,788	$	26,233	$	9,482	$	18,725	$	1,092	$	6	$	70,326
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

	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)
2021
Balance at beginning of period	$	13,586	$	30,681	$	11,271	$	17,384	$	1,748	$	6	$	74,676
Provision charged (credited)	1,796		(5,117)		(1,790)		2,945		(400)		5		(2,561)
Recoveries	18		1,231		1		169		52		—		1,471
Charge-offs	(612)		(562)		—		(1,773)		(308)		(5)		(3,260)
Balance at end of period	$	14,788	$	26,233	$	9,482	$	18,725	$	1,092	$	6	$	70,326
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

Schedule of troubled debt restructuring

The following tables present the number of loans modified as TDRs during the three and nine months ended September 30, 2021 and 2020, 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.

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

	For the Three Months Ended September 30,
	2021					2020
	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:
One-to-four family	1	$	64	$	66	—	$	—	$	—
Multifamily and commercial	—	—		—		4	16,387		16,387
Commercial business loans	—	—		—		1	1,295		1,295
Total restructured loans	1	$	64	$	66	5	$	17,682	$	17,682

	For the Nine Months Ended September 30,
	2021					2020
	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:
One-to-four family	2	$	285	$	388	—	$	—	$	—
Multifamily and commercial	1	192		211		4	16,387		16,387
Commercial business loans	—	—		—		2	11,507		12,802
Total restructured loans	3	$	477	$	599	6	$	27,894	$	29,189

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, 2021 and December 31, 2020:

	At September 30, 2021
	Recorded Investment		Unpaid Principal Balance		Specific Allowance
	(In thousands)
With no allowance recorded:
Real estate loans:
One-to-four family	$	2,533	$	2,533	$	—
Multifamily and commercial	16,223		16,223		—
Commercial business loans	591		591		—
Consumer loans:
Home equity loans and advances	521		521		—
	19,868		19,868		—
With a specific allowance recorded:
Real estate loans:
One-to-four family	2,938		2,938		264
Multifamily and commercial	1,987		1,987		96
Commercial business loans	1,498		1,497		14
Consumer loans:
Home equity loans and advances	206		206		5
	6,629		6,628		379
Total:
Real estate loans:
One-to-four family	5,471		5,471		264
Multifamily and commercial	18,210		18,210		96
Commercial business loans	2,089		2,088		14
Consumer loans:
Home equity loans and advances	727		727		5
Total loans	$	26,497	$	26,496	$	379

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

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

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, 2021 and 2020:

	For the Three Months Ended September 30,
	2021				2020
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(In thousands)
Real estate loans:
One-to-four family	$	5,569	$	64	$	8,020	$	74
Multifamily and commercial	26,103		227		23,525		227
Commercial business loans	2,106		36		4,979		52
Consumer loans:
Home equity loans and advances	1,101		11		1,935		28
Total loans	$	34,879	$	338	$	38,459	$	381

	For the Nine Months Ended September 30,
	2021				2020
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(In thousands)
Real estate loans:
One-to-four family	$	5,923	$	229	$	8,175	$	226
Multifamily and commercial	28,246		688		20,670		653
Commercial business loans	2,226		106		5,468		196
Consumer loans:
Home equity loans and advances	1,257		32		1,995		85
Total loans	$	37,652	$	1,055	$	36,308	$	1,160

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, 2021 and December 31, 2020:

	September 30, 2021
	One-to-Four Family		Multifamily and Commercial		Construction		Commercial Business		Home Equity Loans and Advances		Other Consumer Loans		Total
	(In thousands)
Pass	$	1,927,870	$	3,052,850	$	271,897	$	427,793	$	263,650	$	1,772	$	5,945,832
Special mention	388		52,562		107		9,787		—		—		62,844
Substandard	5,618		32,049		—		12,441		461		—		50,569
Doubtful	—		—		—		—		—		—		—
Loss	—		—		—		—		—		—		—
Total	$	1,933,876	$	3,137,461	$	272,004	$	450,021	$	264,111	$	1,772	$	6,059,245

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

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Leases (Tables)

9 Months Ended

Sep. 30, 2021

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, 2021	Lease Payment Obligations
	(In thousands)
One year or less	$	1,026
After one year to two years	4,008
After two years to three years	3,739
After three years to four years	3,014
After four years to five years	2,342
Thereafter	6,662
Total undiscounted cash flows	20,791
Discount on cash flows	(1,663)
Total lease liability	$	19,128

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Deposits (Tables)

9 Months Ended

Sep. 30, 2021

Deposits [Abstract]

Schedule of Deposits

Deposits at September 30, 2021 and December 31, 2020 are summarized as follows:

	September 30,		December 31,
	2021		2020
	(In thousands)
Non-interest-bearing demand	$	1,567,112	$	1,354,605
Interest-bearing demand	2,451,718		2,189,164
Money market accounts	636,392		588,180
Savings and club deposits	775,681		688,309
Certificates of deposit	1,791,455		1,958,366
Total deposits	$	7,222,358	$	6,778,624

Schedule of Certificate Accounts by Maturity

Scheduled maturities of certificates of deposit accounts at September 30, 2021 and December 31, 2020 are summarized as follows:

	September 30,		December 31,
	2021		2020
	(In thousands)
One year or less	$	1,193,342	$	1,494,129
After one year to two years	365,668		337,579
After two years to three years	120,496		52,809
After three years to four years	29,925		23,018
After four years	82,024		50,831
	$	1,791,455	$	1,958,366

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Stock Based Compensation (Tables)

9 Months Ended

Sep. 30, 2021

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, 2021 and 2020:

	Number of Restricted Shares	Weighted Average Grant Date Fair Value
Non-vested at January 1, 2021	1,263,169	$	15.66
Grants	50,203	17.86
Forfeited	(13,846)	15.60
Non-vested at March 31, 2021	1,299,526	$	15.74
Forfeited	(128)	15.60
Non-vested at June 30, 2021	1,299,398	$	15.74
Vested	(163,882)	15.61
Forfeited	(29,882)	15.63
Non-vested at September 30, 2021	1,105,634	$	15.76

	Number of Restricted Shares	Weighted Average Grant Date Fair Value
Non-vested at January 1, 2020	1,420,012	$	15.67
Forfeited	(881)	15.60
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

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, 2021 and 2020:

	Number of Stock Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding, January 1, 2021	3,708,628	$	15.66	8.6	$	—
Granted	109,654	17.86		—	—
Expired	(2,029)	15.60		—	—
Forfeited	(30,118)	15.60		—	—
Outstanding, March 31, 2021	3,786,135	$	15.73	8.4	$	6,673,328
Exercised	(1,661)	15.60		—	—
Expired	(7,529)	15.60		—	—
Forfeited	(1,412)	15.60		—	—
Outstanding, June 30, 2021	3,775,533	$	15.73	8.1	$	5,700,258
Exercised	(26,861)	15.60		—	—
Expired	(353)	15.60		—	—
Forfeited	(58,287)	15.73		—	—
Outstanding, September 30, 2021	3,690,032	$	15.73	7.9	$	10,222,527
Options exercisable at September 30, 2021	1,411,976	$	15.64	7.8	$	4,036,196

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, 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	$	—

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Components of Net Periodic Benefit Costs (Tables)

9 Months Ended

Sep. 30, 2021

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 plan benefits for the three and nine months ended September 30, 2021 and 2020, includes the following components:

	For the Three Months Ended September 30,
	Pension Plan				RIM Plan				Post-retirement Plan				Split-Dollar Life Insurance
	2021		2020		2021		2020		2021		2020		2021		2020		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	1,872	$	2,032	$	100	$	67	$	130	$	99	$	141	$	120	Compensation and employee benefits
Interest cost	1,902		1,824		86		102		141		171		125		135		Other non-interest expense
Expected return on plan assets	(6,661)		(5,908)		—		—		—		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		—		—		—		14		14		Other non-interest expense
Net loss	—		1,492		166		99		153		77		191		113		Other non-interest expense
Net periodic (income) benefit cost	$	(2,887)	$	(560)	$	352	$	268	$	424	$	347	$	471	$	382

	For the Nine Months Ended September 30,
	Pension Plan				RIM Plan				Post-retirement Plan				Split-Dollar Life Insurance
	2021		2020		2021		2020		2021		2020		2021		2020		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	6,172	$	5,906	$	300	$	201	$	390	$	297	$	423	$	346	Compensation and employee benefits
Interest cost	5,414		5,887		258		306		423		513		375		384		Other non-interest expense
Expected return on plan assets	(19,297)		(17,383)		—		—		—		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		—		—		—		42		42		Other non-interest expense
Net loss	2,000		3,054		498		297		459		231		573		339		Other non-interest expense
Net periodic (income) benefit cost	$	(5,711)	$	(2,536)	$	1,056	$	804	$	1,272	$	1,041	$	1,413	$	1,111

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2021

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, 2021 and December 31, 2020, by level within the fair value hierarchy:

	September 30, 2021
			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	$	39,303	$	35,194	$	4,109	$	—
Mortgage-backed securities and collateralized mortgage obligations	1,650,612		—		1,650,612		—
Municipal obligations	10,210		—		10,210		—
Corporate debt securities	64,741		—		64,741		—
Trust preferred securities	—		—		—		—
Total debt securities available for sale	1,764,866		35,194		1,729,672		—
Equity securities	2,785		2,439		346		—
Derivative assets	11,464		—		11,464		—
	$	1,779,115	$	37,633	$	1,741,482	$	—
Derivative liabilities	$	25,068	$	—	$	25,068	$	—

	December 31, 2020
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Debt securities available for sale:
U.S. government and agency obligations	$	25,549	$	25,549	$	—	$	—
Mortgage-backed securities and collateralized mortgage obligations	1,200,394		—		1,200,394		—
Municipal obligations	16,862		—		16,862		—
Corporate debt securities	69,477		—		69,477		—
Trust preferred securities	4,670		—		4,670		—
Total debt securities available for sale	1,316,952		25,549		1,291,403		—
Equity securities	5,418		5,072		346
Derivative assets	19,425		—		19,425		—
	$	1,341,795	$	30,621	$	1,311,174	$	—
Derivative liabilities	$	42,384	$	—	$	42,384	$	—

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, 2021 and December 31, 2020, by level within the fair value hierarchy:

	September 30, 2021
			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	$	1,213	$	—	$	—	$	1,213
Mortgage servicing rights	2,057		—		—		2,057
	$	3,270	$	—	$	—	$	3,270

	December 31, 2020
			Fair Value Measurements
	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Mortgage servicing rights	$	1,338	$	—	$	—	$	1,338
	$	1,338	$	—	$	—	$	1,338

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, 2021 and December 31, 2020:

	September 30, 2021
	Fair Value		Valuation Methodology	Unobservable Inputs	Range of Inputs		Weighted Average
	(Dollars in thousands)
Impaired loans	$	1,213	Other	Contracted sale price of collateral	—	%	—	%
Mortgage servicing rights	2,057		Discounted cash flow	Prepayment speeds and discount rates (1)	7.5% - 25.0%		12.3	%

	December 31, 2020
	Fair Value		Valuation Methodology	Unobservable Inputs	Range of Inputs	Weighted Average
	(Dollars in thousands)
Mortgage servicing rights	$	1,338	Discounted cash flow	Prepayment speeds and discount rates (1)	9.7% - 26.2%	16.7	%
(1) 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, 2021 and December 31, 2020:

	September 30, 2021
			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	$	298,488	$	298,488	$	298,488	$	—	$	—
Debt securities available for sale	1,764,866		1,764,866		35,194		1,729,672		—
Debt securities held to maturity	408,088		417,268		—		417,268		—
Equity securities	2,785		2,785		2,439		346		—
Federal Home Loan Bank stock	40,891		40,891		—		40,891		—
Loans receivable, net	6,013,968		6,230,842		—		—		6,230,842
Derivative assets	11,464		11,464		—		11,464		—
Financial liabilities:
Deposits	$	7,222,358	$	7,224,770	$	—	$	7,224,770	$	—
Borrowings	749,631		753,800		—		753,800		—
Derivative liabilities	25,068		25,068		—		25,068		—

	December 31, 2020
			Fair Value Measurements
	Carrying Value		Total Fair Value		Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
	(In thousands)
Financial assets:
Cash and cash equivalents	$	422,957	$	422,957	$	422,957	$	—	$	—
Debt securities available for sale	1,316,952		1,316,952		25,549		1,291,403		—
Debt securities held to maturity	262,720		277,091		5,001		272,090		—
Equity securities	5,418		5,418		5,072		346		—
Federal Home Loan Bank stock	43,759		43,759		—		43,759		—
Loans receivable, net	6,107,094		6,394,524		—		—		6,394,524
Derivative assets	19,425		19,425		—		19,425		—
Financial liabilities:
Deposits	$	6,778,624	$	6,793,034	$	—	$	6,793,034	$	—
Borrowings	799,364		808,853		—		808,853		—
Derivative liabilities	42,384		42,384		—		42,384		—

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Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 30, 2021

Equity [Abstract]

Schedule of Other Comprehensive Income (Loss)

The following tables present the components of other comprehensive income (loss), both gross and net of tax, for the three and nine months ended September 30, 2021 and 2020:

	For the Three Months Ended September 30,
	2021						2020
	Before Tax		Tax Effect		After Tax		Before Tax		Tax Effect		After Tax
	(In thousands)
Components of other comprehensive income (loss):
Unrealized (loss) on debt securities available for sale:	$	(13,609)	$	3,666	$	(9,943)	$	(3,688)	$	775	$	(2,913)
Accretion of unrealized (loss) on debt securities reclassified as held to maturity	(3)		1		(2)		(4)		—		(4)
Reclassification adjustment for gain included in net income	2,296		(505)		1,791		—		—		—
	(11,316)		3,162		(8,154)		(3,692)		775		(2,917)
Derivatives:
Unrealized gain on swap contracts accounted for as cash flow hedges	2,035		(568)		1,467		2,256		(471)		1,785
	2,035		(568)		1,467		2,256		(471)		1,785
Employee benefit plans:
Amortization of prior service cost included in net income	(14)		4		(10)		(14)		3		(11)
Reclassification adjustment of actuarial net (loss) included in net income	(1,511)		422		(1,089)		(1,071)		225		(846)
Change in funded status of retirement obligations	3,050		(852)		2,198		(41,434)		8,701		(32,733)
	1,525		(426)		1,099		(42,519)		8,929		(33,590)
Total other comprehensive income (loss)	$	(7,756)	$	2,168	$	(5,588)	$	(43,955)	$	9,233	$	(34,722)

15.    Other Comprehensive Income (Loss) (continued)

	For the Nine Months Ended September 30,
	2021						2020
	Before Tax		Tax Effect		After Tax		Before Tax		Tax Effect		After Tax
	(In thousands)
Components of other comprehensive income (loss):
Unrealized (loss) gain on debt securities available for sale:	$	(26,804)	$	4,615	$	(22,189)	$	28,736	$	(6,031)	$	22,705
Accretion of unrealized (loss) gain on debt securities reclassified as held to maturity	(24)		24		—		1		—		1
Reclassification adjustment for (loss) gain included in net income	2,015		(426)		1,589		370		(81)		289
	(24,813)		4,213		(20,600)		29,107		(6,112)		22,995
Derivatives:
Unrealized gain (loss) on swap contracts accounted for as cash flow hedges	9,182		(1,084)		8,098		(13,050)		2,736		(10,314)
	9,182		(1,084)		8,098		(13,050)		2,736		(10,314)
Employee benefit plans:
Amortization of prior service cost included in net income	(42)		11		(31)		(42)		10		(32)
Reclassification adjustment of actuarial net (loss) included in net income	(4,533)		1,266		(3,267)		(3,213)		674		(2,539)
Change in funded status of retirement obligations	40,541		(3,971)		36,570		(37,093)		7,789		(29,304)
	35,966		(2,694)		33,272		(40,348)		8,473		(31,875)
Total other comprehensive income (loss)	$	20,335	$	435	$	20,770	$	(24,291)	$	5,097	$	(19,194)

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, 2021 and 2020:

	For the Three Months Ended September 30,
	2021								2020
	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	$	18,582	$	(10,225)	$	(51,624)	$	(43,267)	$	35,225	$	(20,573)	$	(67,859)	$	(53,207)
Current period changes in other comprehensive income (loss)	(8,154)		1,467		1,099		(5,588)		(2,917)		1,785		(33,590)		(34,722)
Total other comprehensive income (loss)	$	10,428	$	(8,758)	$	(50,525)	$	(48,855)	$	32,308	$	(18,788)	$	(101,449)	$	(87,929)

	For the Nine Months Ended September 30,
	2021								2020
	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	$	31,028	$	(16,856)	$	(83,797)	$	(69,625)	$	9,313	$	(8,474)	$	(69,574)	$	(68,735)
Current period changes in other comprehensive income (loss)	(20,600)		8,098		33,272		20,770		22,995		(10,314)		(31,875)		(19,194)
Total other comprehensive income (loss)	$	10,428	$	(8,758)	$	(50,525)	$	(48,855)	$	32,308	$	(18,788)	$	(101,449)	$	(87,929)

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, 2021 and 2020:

	Accumulated Other Comprehensive Income (Loss) Components
	For the Three Months Ended September 30,				Affected Line Items in the Consolidated Statements of Income
	2021		2020
	(In thousands)
Reclassification adjustment for gain included in net income	$	2,296	$	—	Gain on securities transactions
Reclassification adjustment of actuarial net (loss) included in net income	(1,511)		(1,071)		Other non-interest expense
Total before tax	785		(1,071)
Income (tax) benefit	(83)		225
Net of tax	$	702	$	(846)

	Accumulated Other Comprehensive Income (Loss) Components
	For the Nine Months Ended September 30,				Affected Line Items in the Consolidated Statements of Income
	2021		2020
	(In thousands)
Reclassification adjustment for gain included in net income	$	2,015	$	370	Gain on securities transactions
Reclassification adjustment of actuarial net (loss) included in net income	(4,533)		(3,213)		Other non-interest expense
Total before tax	(2,518)		(2,843)
Income (tax) benefit	840		593
Net of tax	$	(1,678)	$	(2,250)

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Derivatives and Hedging Activities (Tables)

9 Months Ended

Sep. 30, 2021

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, 2021 and December 31, 2020:

	September 30, 2021
	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	$	11,464	Other Liabilities	$	25,068
Total derivative instruments		$	11,464		$	25,068

	December 31, 2020
	Asset Derivative			Liability Derivative
	Consolidated Statements of Financial Condition	Fair Value		Consolidated Statements of Financial Condition	Fair Value
		(In thousands)
Derivatives:
Interest rate swaps	Other Assets	$	19,425	Other Liabilities	$	42,384
Total derivative instruments		$	19,425		$	42,384

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Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2021

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, 2021 and 2020.

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Non-interest income
In-scope of Topic 606:
Demand deposit account fees	$	986	$	787	$	2,682	$	2,706
Title insurance fees	1,431		1,218		4,554		3,445
Other non-interest income	1,934		1,749		5,633		4,688
Total in-scope non-interest income	4,351		3,754		12,869		10,839
Total out-of-scope non-interest income	4,523		4,155		18,991		10,469
Total non-interest income	$	8,874	$	7,909	$	31,860	$	21,308

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Acquisitions - Narrative (Details)			3 Months Ended				9 Months Ended
	Apr. 01, 2020 USD ($) shares	Nov. 01, 2019 USD ($) branch $ / shares	Sep. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($) branch	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($) branch
Business Acquisition [Line Items]
Merger-related expenses			$ 55,000			$ 424,000	$ 130,000	$ 1,931,000
Branch closures
Business Acquisition [Line Items]
Number of branches closed | branch						4		4
Gain (loss) on branch closures			14,000				(301,000)	$ (770,000)
Stewardship Financial Corporation
Business Acquisition [Line Items]
Number of stores | branch		12
Stewardship Financial Corporation
Business Acquisition [Line Items]
Business acquisition, share price (in dollars per share) | $ / shares		$ 15.75
Payments to acquire businesses, gross		$ 136,300,000
Merger-related expenses						$ 248,000		1,300,000
Roselle Entities
Business Acquisition [Line Items]
Merger-related expenses			0			175,000	0	618,000
Business acquisition, equity interest issued or issuable (in shares) | shares	4,759,048
Goodwill	$ 23,809,000		17,600,000				17,600,000
Business combination, provisional information, initial accounting incomplete, adjustment, deferred tax assets				$ 1,100,000	$ 5,100,000
Freehold
Business Acquisition [Line Items]
Merger-related expenses			$ 55,000			$ 0	$ 130,000	$ 0

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Acquisitions - Assets Acquired and Liabilities Assumed in Roselle Acquisition (Details) - Roselle Entities - USD ($) $ in Thousands	Apr. 01, 2020	Sep. 30, 2021
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	$ 17,600

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Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net income	$ 20,982	$ 15,087	$ 68,715	$ 36,949
Shares:
Weighted average shares outstanding - basic (in shares)	102,977,254	110,983,871	104,486,520	110,177,736
Effect of dilutive common stock equivalents (in shares)	0	0	0	0
Weighted average shares outstanding - diluted (in shares)	102,977,254	110,983,871	104,486,520	110,177,736
Earnings per share:
Earnings per share - basic (in dollars per share)	$ 0.20	$ 0.14	$ 0.66	$ 0.34
Earnings per share - diluted (in dollars per share)	$ 0.20	$ 0.14	$ 0.66	$ 0.34
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	3,731,901	3,771,082	3,741,138	3,769,793

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Stock Repurchase Program (Details) - USD ($) $ / shares in Units, $ in Thousands					3 Months Ended		9 Months Ended
	Feb. 01, 2021	Sep. 10, 2020	Dec. 05, 2019	Jun. 13, 2019	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Equity [Abstract]
Stock repurchase program, number of shares authorized to be repurchased (in shares)	5,000,000	5,000,000		4,000,000
Stock repurchase program, percent of common stock	4.50%	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)					1,163,500	624,932	4,633,540	4,081,132
Shares repurchased, value					$ 20,544	$ 6,925	$ 79,090	$ 60,286
Shares repurchased, price per share (in dollars per share)					$ 17.66	$ 11.08	$ 17.07	$ 14.78

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Summary of Significant Accounting Policies - Narrative (Details) - ASU 2016-13 - Forecast	Jan. 01, 2022
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing receivable, allowance for credit loss, period decrease, percent	15.00%
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing receivable, allowance for credit loss, period decrease, percent	25.00%

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Debt Securities Available for Sale - Securities Available-for-Sale (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,750,214	$ 1,277,511
Gross Unrealized Gains	24,073	40,748
Gross Unrealized (Losses)	(9,421)	(1,307)
Fair Value	1,764,866	1,316,952
U.S. government and agency obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	38,651	24,425
Gross Unrealized Gains	749	1,124
Gross Unrealized (Losses)	(97)	0
Fair Value	39,303	25,549
Mortgage-backed securities and collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,638,630	1,163,613
Gross Unrealized Gains	21,077	37,343
Gross Unrealized (Losses)	(9,095)	(562)
Fair Value	1,650,612	1,200,394
Municipal obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	10,190	16,845
Gross Unrealized Gains	20	17
Gross Unrealized (Losses)	0	0
Fair Value	10,210	16,862
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	62,743	67,628
Gross Unrealized Gains	2,227	2,264
Gross Unrealized (Losses)	(229)	(415)
Fair Value	$ 64,741	69,477
Trust preferred securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		5,000
Gross Unrealized Gains		0
Gross Unrealized (Losses)		(330)
Fair Value		$ 4,670

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Debt Securities Available for Sale - Expected Maturities of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Amortized Cost
One year or less	$ 6,944
More than one year to five years	68,415
More than five years to ten years	36,225
Available-for-sale debt securities, allocated and single maturity date, total	111,584
Mortgage-backed securities and collateralized mortgage obligations	1,638,630
Amortized Cost	1,750,214	$ 1,277,511
Fair Value
One year or less	6,944
More than one year to five years	70,837
More than five years to ten years	36,473
Available-for-sale debt securities, allocated and single maturity date, total	114,254
Mortgage-backed securities and collateralized mortgage obligations	1,650,612
Debt securities available for sale, at fair value	$ 1,764,866	$ 1,316,952

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Debt Securities Available for Sale - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($) security	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) security	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($) security
Investments, Debt and Equity Securities [Abstract]
Mortgage-backed securities and collateralized mortgage obligations	$ 1,638,630,000		$ 1,638,630,000
Mortgage-backed securities and collateralized mortgage obligations	1,650,612,000		1,650,612,000
Proceeds from sales of debt securities available for sale	22,500,000	$ 0	27,249,000	$ 20,761,000
Gross gains on sale of available-for-sale securities	2,000,000		2,000,000	369,000
Gross losses on sale of available-for-sale securities	0		281,000
Sale and maturity of debt securities, available-for-sale	0		210,000	5,800,000
Proceeds from calls of debt securities available for sale	9,000,000		14,000,000	6,600,000
Gross gains or losses on debt securities available-for-sale	0		0
Calls of debt securities, available-for-sale, realized gain				1,000
Debt securities, available-for-sale, restricted	$ 567,800,000		$ 567,800,000		$ 822,200,000
Number of securities in unrealized loss position | security	83		83		40
Other-than-temporary impairments charge on debt securities available for sale	$ 0	$ 0	$ 0	$ 0

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Debt Securities Available for Sale - Continuous Unrealized Loss Position of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	$ 709,665	$ 127,823
Less than 12 months, gross unrealized (losses)	(8,279)	(636)
12 months or longer, fair value	66,083	34,428
12 months or longer, gross unrealized (losses)	(1,142)	(671)
Fair value	775,748	162,251
Gross unrealized (losses)	(9,421)	(1,307)
U.S. government and agency obligations
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	9,804
Less than 12 months, gross unrealized (losses)	(97)
12 months or longer, fair value	0
12 months or longer, gross unrealized (losses)	0
Fair value	9,804
Gross unrealized (losses)	(97)
Mortgage-backed securities and collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	694,865	117,978
Less than 12 months, gross unrealized (losses)	(8,178)	(481)
12 months or longer, fair value	61,308	24,018
12 months or longer, gross unrealized (losses)	(917)	(81)
Fair value	756,173	141,996
Gross unrealized (losses)	(9,095)	(562)
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	4,996	9,845
Less than 12 months, gross unrealized (losses)	(4)	(155)
12 months or longer, fair value	4,775	5,740
12 months or longer, gross unrealized (losses)	(225)	(260)
Fair value	9,771	15,585
Gross unrealized (losses)	$ (229)	(415)
Trust preferred securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value		0
Less than 12 months, gross unrealized (losses)		0
12 months or longer, fair value		4,670
12 months or longer, gross unrealized (losses)		(330)
Fair value		4,670
Gross unrealized (losses)		$ (330)

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Debt Securities Held to Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 408,088	$ 262,720
Gross unrealized gains	10,088	14,373
Gross unrealized (losses)	(908)	(2)
Fair value	417,268	277,091
U.S. government and agency obligations
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	44,870	5,000
Gross unrealized gains	0	1
Gross unrealized (losses)	(489)	0
Fair value	44,381	5,001
Mortgage-backed securities and collateralized mortgage obligations
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	363,218	257,720
Gross unrealized gains	10,088	14,372
Gross unrealized (losses)	(419)	(2)
Fair value	$ 372,887	$ 272,090

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Debt Securities Held to Maturity - Expected Maturities of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Amortized Cost
More than one year to five years	$ 14,875
More than five years to ten years	19,995
More than ten years	10,000
Held-to-maturity debt securities, allocated and single maturity date, total	44,870
Mortgage-backed securities and collateralized mortgage obligations	363,218
Amortized Cost	408,088	$ 262,720
Fair Value
More than one year to five years	14,857
More than five years to ten years	19,685
More than ten years	9,839
Held-to-maturity debt securities, allocated and single maturity date, total	44,381
Mortgage-backed securities and collateralized mortgage obligations	372,887
Debt securities held to maturity	$ 417,268	$ 277,091

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Debt Securities Held to Maturity - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($) security	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) security	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($) security
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, held-to-maturity	$ 408,088,000		$ 408,088,000		$ 262,720,000
Fair value	417,268,000		417,268,000		277,091,000
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	5,100,000	20,000,000
Debt securities, held-to-maturity, sold, realized gain (loss)		0	0	0
Fair value of securities sold under agreements to repurchase	$ 256,900,000		$ 256,900,000		$ 220,500,000
Number of positions | security	10		10		2
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	363,218,000		363,218,000		$ 257,720,000
Fair value	$ 372,887,000		$ 372,887,000		$ 272,090,000

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Debt Securities Held to Maturity - Continuous Unrealized Loss Position on Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, Fair Value	$ 63,185
Less than 12 months, Gross unrealized (losses)	(908)
12 months or longer, Fair value	0
12 months or longer, Gross unrealized (losses)	0
Total, Fair value	63,185
Total, Gross unrealized (losses)	(908)
U.S. government and agency obligations
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, Fair Value	44,381
Less than 12 months, Gross unrealized (losses)	(489)
12 months or longer, Fair value	0
12 months or longer, Gross unrealized (losses)	0
Total, Fair value	44,381
Total, Gross unrealized (losses)	(489)
Mortgage-backed securities and collateralized mortgage obligations
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, Fair Value	18,804	$ 2,176
Less than 12 months, Gross unrealized (losses)	(419)	(2)
12 months or longer, Fair value	0	0
12 months or longer, Gross unrealized (losses)	0	0
Total, Fair value	18,804	2,176
Total, Gross unrealized (losses)	$ (419)	$ (2)

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Equity Securities at Fair Value (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Equity securities	$ 2,785,000		$ 2,785,000		$ 5,418,000
Change in fair value of equity securities	(443,000)	$ (4,000)	(1,809,000)	$ 55,000
Proceeds from sale of equity securities	1,300,000	$ 0	1,300,000	$ 0
Equity securities, realized gain	344,000		344,000
Equity securities, realized loss	$ 0		$ 0

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Loans Receivable and Allowance for Loan Losses - Loans Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	$ 6,062,239	$ 6,168,892
Net deferred loan costs, fees and purchased premiums and discounts	22,055	12,878
Loans receivable	6,084,294	6,181,770
Real estate loans | One-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	1,934,109	1,940,636
Real estate loans | Multifamily and commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	3,139,240	2,822,858
Real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	272,004	328,711
Commercial business loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	451,003	754,013
Consumer loans | Home equity loans and advances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	264,111	321,177
Consumer loans | Other consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	1,772	1,497
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	6,059,245	6,162,547
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	1,933,876	1,940,327
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	3,137,461	2,817,965
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	272,004	328,711
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	450,021	752,870
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	264,111	321,177
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	1,772	1,497
Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	2,994	6,345
Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	233	309
Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total gross loans	1,779	4,893
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	982	1,143
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

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Loans Receivable and Allowance for Loan Losses - Narrative (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021 USD ($) loan	Sep. 30, 2020 USD ($) loan	Sep. 30, 2021 USD ($) loan	Sep. 30, 2020 USD ($) loan	Dec. 31, 2020 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held-for-sale	$ 0		$ 0		$ 4,100,000
Proceeds from sales of loans held-for-sale			293,005,000	$ 111,764,000
Gain on sale of loans held-for-sale	140,000		8,600,000
Loss on sale of loans held-for-sale	0		0
Proceeds from sales of loans receivable	0		0	28,923,000
Purchases of loans receivable		$ 0	74,232,000	$ 0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	6,084,294,000		6,084,294,000		6,181,770,000
Carrying value of servicing liability	551,100,000		$ 551,100,000		$ 598,000,000
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	5,300,000		$ 5,300,000		$ 8,200,000
Financing receivable, 90 days or more past due, still accruing	0		0		0
Real estate owned	$ 0		$ 0		$ 0
Mortgage loans in process of foreclosure, number of loans | loan	1		1		2
Mortgage loans in process of foreclosure, amount	$ 86,000		$ 86,000		$ 398,000
Specific allowance for loan losses attributable to impaired loans	379,000		379,000		1,088,000
Impaired loans for which there are no related allowance for loan losses	19,868,000		19,868,000		19,061,000
Financing receivable, modifications, recorded investment	$ 23,500,000		$ 23,500,000		45,400,000
Number of loans | loan	1	5	3	6
Real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales of loans receivable		$ 274,000
Gain on sale of loans held-for-investment		23,000
Real estate loans | One-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales of loans held-for-sale	$ 1,800,000	7,800,000	$ 17,400,000	$ 111,800,000
Gain on sale of loans held-for-sale		327,000		1,700,000
Loss on sale of loans held-for-sale		$ 0		0
Proceeds from sale of loans held-for-investment				8,800,000
Gain on sale of loans held-for-investment				82,000
Loss on sale of loans held-for-investment				$ 0
Purchases of loans receivable	678,000		678,000
Specific allowance for loan losses attributable to impaired loans	264,000		264,000		391,000
Impaired loans for which there are no related allowance for loan losses	$ 2,533,000		$ 2,533,000		3,344,000
Number of loans | loan	1	0	2	0
Real estate loans | Multifamily and commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales of loans held-for-sale	$ 15,000,000		$ 19,100,000
Purchases of loans receivable	2,000,000		73,600,000
Specific allowance for loan losses attributable to impaired loans	96,000		96,000		601,000
Impaired loans for which there are no related allowance for loan losses	$ 16,223,000		$ 16,223,000		13,058,000
Number of loans | loan	0	4	1	4
Real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales of loans held-for-sale			$ 6,400,000
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]
Proceeds from sales of loans held-for-sale	$ 1,200,000		250,100,000
Proceeds from sale of loans held-for-investment				7,600,000
Gain on sale of loans held-for-investment				78,000
Loss on sale of loans held-for-investment				$ 0
Specific allowance for loan losses attributable to impaired loans	14,000		14,000		84,000
Impaired loans for which there are no related allowance for loan losses	$ 591,000		$ 591,000		1,945,000
Number of loans | loan	0	1	0	2
Less Than 90 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	$ 1,300,000		$ 1,300,000		$ 2,200,000
Financial receivable, number of loans in nonaccrual status | loan			13		19
60-89 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, modifications, recorded investment	400,000		$ 400,000
Number of loans | loan			1
90 Days or More
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, modifications, recorded investment					$ 91,000
Number of loans | loan					1
30-59 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, modifications, recorded investment	45,000		$ 45,000		$ 11,900,000
Number of loans | loan					3
Freddie Mac
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales of loans receivable	0		99,600,000
Gain on sale of loans receivable		$ 1,500,000	2,300,000	$ 1,500,000
Loss on sale of loans receivable		0	0	0
Proceeds from securitizations of loans held-for-investment		$ 48,500,000		$ 48,500,000
Stewardship Financial Corporation | Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	2,800,000		2,800,000		$ 6,100,000
Roselle Entities | Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	184,000		184,000		246,000
Paycheck Protection Program | Commercial business loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	69,200,000		69,200,000		344,400,000
Financing receivable, unamortized loan fee	$ 1,900,000		$ 1,900,000		$ 6,600,000

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Loans Receivable and Allowance for Loan Losses - Aging of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Non-accrual	$ 5,300	$ 8,200
Total gross loans	6,062,239	6,168,892
Real estate loans | One-to-four family
Financing Receivable, Past Due [Line Items]
Total gross loans	1,934,109	1,940,636
Real estate loans | Multifamily and commercial
Financing Receivable, Past Due [Line Items]
Total gross loans	3,139,240	2,822,858
Real estate loans | Construction
Financing Receivable, Past Due [Line Items]
Total gross loans	272,004	328,711
Commercial business loans
Financing Receivable, Past Due [Line Items]
Total gross loans	451,003	754,013
Consumer loans | Home equity loans and advances
Financing Receivable, Past Due [Line Items]
Total gross loans	264,111	321,177
Consumer loans | Other consumer loans
Financing Receivable, Past Due [Line Items]
Total gross loans	1,772	1,497
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Past Due [Line Items]
Non-accrual	5,266	8,156
Total gross loans	6,059,245	6,162,547
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total gross loans	9,854	31,416
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | 30-59 Days
Financing Receivable, Past Due [Line Items]
Total gross loans	2,266	22,766
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | 60-89 Days
Financing Receivable, Past Due [Line Items]
Total gross loans	3,635	2,664
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | 90 Days or More
Financing Receivable, Past Due [Line Items]
Total gross loans	3,953	5,986
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Total gross loans	6,049,391	6,131,131
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family
Financing Receivable, Past Due [Line Items]
Non-accrual	1,991	2,637
Total gross loans	1,933,876	1,940,327
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total gross loans	3,612	5,881
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 gross loans	1,274	3,068
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 gross loans	1,370	912
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 gross loans	968	1,901
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Total gross loans	1,930,264	1,934,446
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial
Financing Receivable, Past Due [Line Items]
Non-accrual	2,433	1,873
Total gross loans	3,137,461	2,817,965
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total gross loans	4,659	16,883
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 gross loans	486	15,645
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 gross loans	1,740	0
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 gross loans	2,433	1,238
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Total gross loans	3,132,802	2,801,082
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction
Financing Receivable, Past Due [Line Items]
Non-accrual	0	0
Total gross loans	272,004	328,711
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total gross loans	107	550
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction | 30-59 Days
Financing Receivable, Past Due [Line Items]
Total gross loans	107	550
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction | 60-89 Days
Financing Receivable, Past Due [Line Items]
Total gross loans	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 gross loans	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Total gross loans	271,897	328,161
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans
Financing Receivable, Past Due [Line Items]
Non-accrual	523	2,968
Total gross loans	450,021	752,870
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total gross loans	1,118	5,852
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans | 30-59 Days
Financing Receivable, Past Due [Line Items]
Total gross loans	225	2,343
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans | 60-89 Days
Financing Receivable, Past Due [Line Items]
Total gross loans	400	1,056
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans | 90 Days or More
Financing Receivable, Past Due [Line Items]
Total gross loans	493	2,453
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Total gross loans	448,903	747,018
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances
Financing Receivable, Past Due [Line Items]
Non-accrual	319	678
Total gross loans	264,111	321,177
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total gross loans	358	2,246
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 gross loans	174	1,156
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 gross loans	125	696
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 gross loans	59	394
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Total gross loans	263,753	318,931
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans
Financing Receivable, Past Due [Line Items]
Non-accrual	0	0
Total gross loans	1,772	1,497
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total gross loans	0	4
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 gross loans	0	4
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 gross loans	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans | 90 Days or More
Financing Receivable, Past Due [Line Items]
Total gross loans	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Total gross loans	$ 1,772	$ 1,493

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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, 2021	Sep. 30, 2020	Sep. 30, 2021	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	$ 375	$ 471	$ 418	$ 511
Acquisition	0	0	0	58
Accretion	(27)	(58)	(91)	(156)
Net change in expected cash flows	4	1	25	1
Balance at end of period	$ 352	$ 414	$ 352	$ 414

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Loans Receivable and Allowance for Loan Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Allowance for loan losses:
Total	$ 70,326	$ 69,898	$ 74,676	$ 76,133	$ 74,015	$ 61,709
Total loans:
Total	6,062,239		6,168,892
Real estate loans | One-to-four family
Allowance for loan losses:
Total	14,788	17,108	13,586	15,775	16,633	13,780
Total loans:
Total	1,934,109		1,940,636
Real estate loans | Multifamily and commercial
Allowance for loan losses:
Total	26,233	26,256	30,681	30,989	27,330	22,980
Total loans:
Total	3,139,240		2,822,858
Real estate loans | Construction
Allowance for loan losses:
Total	9,482	9,160	11,271	10,534	10,217	7,435
Total loans:
Total	272,004		328,711
Commercial business loans
Allowance for loan losses:
Total	18,725	15,898	17,384	17,502	18,314	15,836
Total loans:
Total	451,003		754,013
Consumer loans | Home equity loans and advances
Allowance for loan losses:
Total	1,092	1,471	1,748	1,326	1,514	1,669
Total loans:
Total	264,111		321,177
Consumer loans | Other consumer loans
Allowance for loan losses:
Total	6	$ 5	6	$ 7	$ 7	$ 9
Total loans:
Total	1,772		1,497
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Allowance for loan losses:
Individually evaluated for impairment	379		1,088
Collectively evaluated for impairment	69,947		73,588
Total loans:
Individually evaluated for impairment	26,497		45,147
Collectively evaluated for impairment	6,032,748		6,117,400
Total	6,059,245		6,162,547
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family
Allowance for loan losses:
Individually evaluated for impairment	264		391
Collectively evaluated for impairment	14,524		13,195
Total loans:
Individually evaluated for impairment	5,471		7,257
Collectively evaluated for impairment	1,928,405		1,933,070
Total	1,933,876		1,940,327
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial
Allowance for loan losses:
Individually evaluated for impairment	96		601
Collectively evaluated for impairment	26,137		30,080
Total loans:
Individually evaluated for impairment	18,210		32,792
Collectively evaluated for impairment	3,119,251		2,785,173
Total	3,137,461		2,817,965
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction
Allowance for loan losses:
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	9,482		11,271
Total loans:
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	272,004		328,711
Total	272,004		328,711
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans
Allowance for loan losses:
Individually evaluated for impairment	14		84
Collectively evaluated for impairment	18,711		17,300
Total loans:
Individually evaluated for impairment	2,089		3,447
Collectively evaluated for impairment	447,932		749,423
Total	450,021		752,870
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances
Allowance for loan losses:
Individually evaluated for impairment	5		12
Collectively evaluated for impairment	1,087		1,736
Total loans:
Individually evaluated for impairment	727		1,651
Collectively evaluated for impairment	263,384		319,526
Total	264,111		321,177
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans
Allowance for loan losses:
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	6		6
Total loans:
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	1,772		1,497
Total	1,772		1,497
Financial Asset Acquired with Credit Deterioration
Allowance for loan losses:
Total	0		0
Total loans:
Total	2,994		6,345
Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family
Allowance for loan losses:
Total	0		0
Total loans:
Total	233		309
Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily and commercial
Allowance for loan losses:
Total	0		0
Total loans:
Total	1,779		4,893
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	982		1,143
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, 2021 USD ($) loan	Sep. 30, 2020 USD ($) loan	Sep. 30, 2021 USD ($) loan	Sep. 30, 2020 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
No. of Loans | loan	1	5	3	6
Pre-modification Recorded Investment	$ 64	$ 17,682	$ 477	$ 27,894
Post-modification Recorded Investment	$ 66	$ 17,682	$ 599	$ 29,189
Real estate loans | One-to-four family
Financing Receivable, Troubled Debt Restructuring [Line Items]
No. of Loans | loan	1	0	2	0
Pre-modification Recorded Investment	$ 64	$ 0	$ 285	$ 0
Post-modification Recorded Investment	$ 66	$ 0	$ 388	$ 0
Real estate loans | Multifamily and commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
No. of Loans | loan	0	4	1	4
Pre-modification Recorded Investment	$ 0	$ 16,387	$ 192	$ 16,387
Post-modification Recorded Investment	$ 0	$ 16,387	$ 211	$ 16,387
Commercial business loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
No. of Loans | loan	0	1	0	2
Pre-modification Recorded Investment	$ 0	$ 1,295	$ 0	$ 11,507
Post-modification Recorded Investment	$ 0	$ 1,295	$ 0	$ 12,802

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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, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Allowance for loan losses:
Balance at beginning of period	$ 69,898	$ 74,015	$ 74,676	$ 61,709
Provision charged (credited)	480	2,516	(2,561)	17,820
Recoveries	347	247	1,471	608
Charge-offs	(399)	(645)	(3,260)	(4,004)
Balance at end of period	70,326	76,133	70,326	76,133
Real estate loans | One-to-four family
Allowance for loan losses:
Balance at beginning of period	17,108	16,633	13,586	13,780
Provision charged (credited)	(2,218)	(758)	1,796	2,292
Recoveries	4	87	18	329
Charge-offs	(106)	(187)	(612)	(626)
Balance at end of period	14,788	15,775	14,788	15,775
Real estate loans | Multifamily and commercial
Allowance for loan losses:
Balance at beginning of period	26,256	27,330	30,681	22,980
Provision charged (credited)	(317)	3,659	(5,117)	7,998
Recoveries	294	0	1,231	12
Charge-offs	0	0	(562)	(1)
Balance at end of period	26,233	30,989	26,233	30,989
Real estate loans | Construction
Allowance for loan losses:
Balance at beginning of period	9,160	10,217	11,271	7,435
Provision charged (credited)	322	317	(1,790)	3,098
Recoveries	0	0	1	1
Charge-offs	0	0	0	0
Balance at end of period	9,482	10,534	9,482	10,534
Commercial business loans
Allowance for loan losses:
Balance at beginning of period	15,898	18,314	17,384	15,836
Provision charged (credited)	2,854	(573)	2,945	4,685
Recoveries	42	128	169	211
Charge-offs	(69)	(367)	(1,773)	(3,230)
Balance at end of period	18,725	17,502	18,725	17,502
Consumer loans | Home equity loans and advances
Allowance for loan losses:
Balance at beginning of period	1,471	1,514	1,748	1,669
Provision charged (credited)	(165)	(129)	(400)	(253)
Recoveries	7	32	52	55
Charge-offs	(221)	(91)	(308)	(145)
Balance at end of period	1,092	1,326	1,092	1,326
Consumer loans | Other consumer loans
Allowance for loan losses:
Balance at beginning of period	5	7	6	9
Provision charged (credited)	4	0	5	0
Recoveries	0	0	0	0
Charge-offs	(3)	0	(5)	(2)
Balance at end of period	$ 6	$ 7	$ 6	$ 7

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Loans Receivable and Allowance for Loan Losses - Loans Individually Evaluated for Impairment (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Impaired [Line Items]
With no allowance recorded: Recorded investment	$ 19,868	$ 19,061
With no allowance recorded: Unpaid principal balance	19,868	19,788
With a specific allowance recorded: Recorded investment	6,629	26,086
With a specific allowance recorded: Unpaid principal balance	6,628	26,708
Recorded Investment	26,497	45,147
Unpaid Principal Balance	26,496	46,496
Specific Allowance	379	1,088
Real estate loans | One-to-four family
Financing Receivable, Impaired [Line Items]
With no allowance recorded: Recorded investment	2,533	3,344
With no allowance recorded: Unpaid principal balance	2,533	3,898
With a specific allowance recorded: Recorded investment	2,938	3,913
With a specific allowance recorded: Unpaid principal balance	2,938	3,919
Recorded Investment	5,471	7,257
Unpaid Principal Balance	5,471	7,817
Specific Allowance	264	391
Real estate loans | Multifamily and commercial
Financing Receivable, Impaired [Line Items]
With no allowance recorded: Recorded investment	16,223	13,058
With no allowance recorded: Unpaid principal balance	16,223	13,094
With a specific allowance recorded: Recorded investment	1,987	19,734
With a specific allowance recorded: Unpaid principal balance	1,987	20,350
Recorded Investment	18,210	32,792
Unpaid Principal Balance	18,210	33,444
Specific Allowance	96	601
Commercial business loans
Financing Receivable, Impaired [Line Items]
With no allowance recorded: Recorded investment	591	1,945
With no allowance recorded: Unpaid principal balance	591	1,945
With a specific allowance recorded: Recorded investment	1,498	1,502
With a specific allowance recorded: Unpaid principal balance	1,497	1,502
Recorded Investment	2,089	3,447
Unpaid Principal Balance	2,088	3,447
Specific Allowance	14	84
Consumer loans | Home equity loans and advances
Financing Receivable, Impaired [Line Items]
With no allowance recorded: Recorded investment	521	714
With no allowance recorded: Unpaid principal balance	521	851
With a specific allowance recorded: Recorded investment	206	937
With a specific allowance recorded: Unpaid principal balance	206	937
Recorded Investment	727	1,651
Unpaid Principal Balance	727	1,788
Specific Allowance	$ 5	$ 12

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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, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 34,879	$ 38,459	$ 37,652	$ 36,308
Interest Income Recognized	338	381	1,055	1,160
Real estate loans | One-to-four family
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	5,569	8,020	5,923	8,175
Interest Income Recognized	64	74	229	226
Real estate loans | Multifamily and commercial
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	26,103	23,525	28,246	20,670
Interest Income Recognized	227	227	688	653
Commercial business loans
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	2,106	4,979	2,226	5,468
Interest Income Recognized	36	52	106	196
Consumer loans | Home equity loans and advances
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	1,101	1,935	1,257	1,995
Interest Income Recognized	$ 11	$ 28	$ 32	$ 85

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Loans Receivable and Allowance for Loan Losses - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	$ 6,062,239	$ 6,168,892
Real estate loans | One-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	1,934,109	1,940,636
Real estate loans | Multifamily and commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	3,139,240	2,822,858
Real estate loans | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	272,004	328,711
Commercial business loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	451,003	754,013
Consumer loans | Home equity loans and advances
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	264,111	321,177
Consumer loans | Other consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	1,772	1,497
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	6,059,245	6,162,547
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	5,945,832	6,084,247
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	62,844	47,514
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	50,569	30,786
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	1,933,876	1,940,327
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	1,927,870	1,935,032
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	388	404
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	5,618	4,891
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	3,137,461	2,817,965
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	3,052,850	2,758,905
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	52,562	40,392
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	32,049	18,668
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	272,004	328,711
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	271,897	328,711
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	107	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	450,021	752,870
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	427,793	740,010
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	9,787	6,718
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total gross loans	12,441	6,142
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	264,111	321,177
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	263,650	320,092
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	461	1,085
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	1,772	1,497
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	1,772	1,497
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, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Jan. 01, 2020
Lessee, Lease, Description [Line Items]
Total lease liability	$ 19,128		$ 19,128
Operating lease, weighted average remaining lease term	6 years 10 months 24 days		6 years 10 months 24 days		7 years 6 months
Operating lease, weighted average discount rate	2.14%		2.14%		2.26%
Lease, cost	$ 504	$ 603	$ 1,700	$ 1,900
Minimum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, renewal term	3 years		3 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, 2021 USD ($)
Leases [Abstract]
One year or less	$ 1,026
After one year to two years	4,008
After two years to three years	3,739
After three years to four years	3,014
After four years to five years	2,342
Thereafter	6,662
Total undiscounted cash flows	20,791
Discount on cash flows	(1,663)
Total lease liability	$ 19,128

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Deposits - Schedule of Deposits (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Deposits [Abstract]
Non-interest-bearing demand	$ 1,567,112	$ 1,354,605
Interest-bearing demand	2,451,718	2,189,164
Money market accounts	636,392	588,180
Savings and club deposits	775,681	688,309
Certificates of deposit	1,791,455	1,958,366
Total deposits	$ 7,222,358	$ 6,778,624

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Deposits - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Interest-bearing demand	$ 2,451,718		$ 2,451,718		$ 2,189,164
Aggregate amount of certificates of deposit exceeding threshold amount	934,900		934,900		1,000,000
Interest expense on deposits	6,673	$ 12,826	23,403	$ 44,569
Stewardship Financial Corporation
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Interest-bearing demand	$ 16,200		$ 16,200		$ 26,300

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Deposits - Schedule of Deposit Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Deposits [Abstract]
One year or less	$ 1,193,342	$ 1,494,129
After one year to two years	365,668	337,579
After two years to three years	120,496	52,809
After three years to four years	29,925	23,018
After four years	82,024	50,831
Total term certificate accounts	$ 1,791,455	$ 1,958,366

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Stock Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands					3 Months Ended				9 Months Ended
	Mar. 22, 2021	Dec. 14, 2020	Dec. 16, 2019	Jul. 23, 2019	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 06, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)															7,949,996
Granted (in shares)	109,654		184,378	3,707,901			109,654
Grants in period (in dollars per share)	$ 4.91		$ 4.59	$ 4.25
Granted (in dollars per share)	$ 17.86		$ 17.00	$ 15.60			$ 17.86
Exercises in period, aggregate intrinsic value					$ 56,186				$ 59,991
Exercises in period (in shares)					26,861	1,661		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)	50,203	33,160	74,673	1,389,570			50,203
Granted (in dollars per share)	$ 17.86	$ 15.08	$ 17.00	$ 15.60			$ 17.86
Stock based compensation					$ 1,400			$ 1,400	$ 4,300	$ 4,200
Non-vested restricted shares outstanding (in shares)					1,105,634	1,299,398	1,299,526	1,236,074	1,105,634	1,236,074	1,263,169	1,418,891	1,419,131	1,420,012
Non-vested restricted shares outstanding, amount					$ 9,700				$ 9,700
Period for recognition (in years)									2 years 1 month 6 days
Restricted Stock | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)				1 year
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)	3 years		5 years	5 years
Stock based compensation					$ 822			$ 808	$ 2,400	$ 2,400
Non-vested restricted shares outstanding (in shares)					2,278,056				2,278,056
Non-vested restricted shares outstanding, amount					$ 9,000				$ 9,000
Period for recognition (in years)									2 years 9 months 18 days
Expiration period (in years)	10 years		10 years	10 years
Expected term	6 years		6 years 6 months	6 years 6 months
Risk free interest rate	1.11%		1.79%	1.90%
Expected volatility rate	25.98%		22.23%	22.12%
Expected dividend rate	0.00%		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	1 year

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Stock Based Compensation - Restricted Stock Activity (Details) - Restricted Stock - $ / shares					3 Months Ended
	Mar. 22, 2021	Dec. 14, 2020	Dec. 16, 2019	Jul. 23, 2019	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020
Number of Restricted Shares
Beginning balance (in shares)					1,299,398	1,299,526	1,263,169	1,418,891	1,419,131	1,420,012
Granted (in shares)	50,203	33,160	74,673	1,389,570			50,203
Vested (in shares)					(163,882)			(167,427)
Forfeited (in shares)					(29,882)	(128)	(13,846)	(15,390)	(240)	(881)
Ending balance (in shares)					1,105,634	1,299,398	1,299,526	1,236,074	1,418,891	1,419,131
Weighted Average Grant Date Fair Value
Beginning balance (in dollars per share)					$ 15.74	$ 15.74	$ 15.66	$ 15.67	$ 15.67	$ 15.67
Granted (in dollars per share)	$ 17.86	$ 15.08	$ 17.00	$ 15.60			17.86
Vested (in dollars per share)					15.61			15.62
Forfeited (in dollars per share)					15.63	15.60	15.60	16.07	15.60	15.60
Ending balance (in dollars per share)					$ 15.76	$ 15.74	$ 15.74	$ 15.68	$ 15.67	$ 15.67

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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
	Mar. 22, 2021	Dec. 16, 2019	Jul. 23, 2019	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Number of Stock Options
Beginning balance (in shares)				3,775,533	3,786,135	3,708,628	3,771,690	3,774,337	3,784,044	3,784,044	3,784,044
Granted (in shares)	109,654	184,378	3,707,901			109,654
Exercises (in shares)				(26,861)	(1,661)		0			0
Expired (in shares)				(353)	(7,529)	(2,029)
Forfeited (in shares)				(58,287)	(1,412)	(30,118)	(44,485)	(2,647)	(9,707)
Ending balance (in shares)				3,690,032	3,775,533	3,786,135	3,727,205	3,771,690	3,774,337	3,727,205	3,708,628	3,784,044
Options exercisable (in shares)				1,411,976			727,438			727,438
Weighted Average Exercise Price
Beginning balance (in dollars per share)				$ 15.73	$ 15.73	$ 15.66	$ 15.67		$ 15.67	$ 15.67	$ 15.67
Granted (in dollars per share)	$ 17.86	$ 17.00	$ 15.60			17.86
Exercised (in dollars per share)				15.60	15.60
Expired (in dollars per share)				15.60	15.60	15.60
Forfeited (in dollars per share)				15.73	15.60	15.60	15.95	$ 15.60	$ 15.60
Ending balance (in dollars per share)				15.73	$ 15.73	$ 15.73	15.67	$ 15.67		15.67	$ 15.66	$ 15.67
Options exercisable (in dollars per share)				$ 15.64			$ 15.62			$ 15.62
Weighted Average Remaining Contractual Term (in years)
Options outstanding				7 years 10 months 24 days	8 years 1 month 6 days	8 years 4 months 24 days	8 years 9 months 18 days	9 years 1 month 6 days	9 years 3 months 18 days		8 years 7 months 6 days	9 years 7 months 6 days
Options exercisable				7 years 9 months 18 days			8 years 8 months 12 days
Aggregate Intrinsic Value
Options outstanding				$ 10,222,527	$ 5,700,258	$ 6,673,328	$ 0	$ 0		$ 0	$ 0	$ 4,812,490
Options exercisable				$ 4,036,196

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Components of Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
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	$ 35,000		$ 35,000
Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	1,872	$ 2,032	6,172	$ 5,906
Interest cost	1,902	1,824	5,414	5,887
Expected return on plan assets	(6,661)	(5,908)	(19,297)	(17,383)
Amortization of Prior service cost	0	0	0	0
Amortization of Net loss	0	1,492	2,000	3,054
Net periodic (income) benefit cost	(2,887)	(560)	(5,711)	(2,536)
RIM Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	100	67	300	201
Interest cost	86	102	258	306
Expected return on plan assets	0	0	0	0
Amortization of Prior service cost	0	0	0	0
Amortization of Net loss	166	99	498	297
Net periodic (income) benefit cost	352	268	1,056	804
Post-retirement Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	130	99	390	297
Interest cost	141	171	423	513
Expected return on plan assets	0	0	0	0
Amortization of Prior service cost	0	0	0	0
Amortization of Net loss	153	77	459	231
Net periodic (income) benefit cost	424	347	1,272	1,041
Split-Dollar Life Insurance
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	141	120	423	346
Interest cost	125	135	375	384
Expected return on plan assets	0	0	0	0
Amortization of Prior service cost	14	14	42	42
Amortization of Net loss	191	113	573	339
Net periodic (income) benefit cost	471	382	1,413	1,111
Former Bank President | RIM Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic (income) benefit cost	$ 2	$ 6	$ 4	$ 8

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Fair Value Measurements - Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale	$ 1,764,866	$ 1,316,952
Equity securities	2,785	5,418
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	39,303	25,549
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	1,650,612	1,200,394
Municipal obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale	10,210	16,862
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale	64,741	69,477
Trust preferred securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale		4,670
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	35,194	25,549
Equity securities	2,439	5,072
Derivative assets	0	0
Derivative liabilities	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale	1,729,672	1,291,403
Equity securities	346	346
Derivative assets	11,464	19,425
Derivative liabilities	25,068	42,384
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	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	1,764,866	1,316,952
Equity securities	2,785	5,418
Derivative assets	11,464	19,425
Assets	1,779,115	1,341,795
Derivative liabilities	25,068	42,384
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	39,303	25,549
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	1,650,612	1,200,394
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	10,210	16,862
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	64,741	69,477
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	0	4,670
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	35,194	25,549
Equity securities	2,439	5,072
Derivative assets	0	0
Assets	37,633	30,621
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	35,194	25,549
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	1,729,672	1,291,403
Equity securities	346	346
Derivative assets	11,464	19,425
Assets	1,741,482	1,311,174
Derivative liabilities	25,068	42,384
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	4,109	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	1,650,612	1,200,394
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	10,210	16,862
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	64,741	69,477
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	0	4,670
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

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Fair Value Measurements - Narrative (Details)	9 Months Ended
	Sep. 30, 2021
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%

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Fair Value Measurements - Assets and Liabilities Measured on Non-Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 0	$ 0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	6,230,842	6,394,524
Measured on non-recurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	1,213
Mortgage servicing rights	2,057	1,338
Assets	3,270	1,338
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]
Impaired loans	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]
Impaired loans	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]
Impaired loans	1,213
Mortgage servicing rights	2,057	1,338
Assets	$ 3,270	$ 1,338

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Fair Value Measurements - Qualitative Valuation (Details) $ in Thousands	Sep. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
Measured on non-recurring basis
Fair Value
Impaired loans	$ 1,213
Mortgage servicing rights	2,057	$ 1,338
Significant Unobservable Inputs (Level 3)
Fair Value
Impaired loans	6,230,842	6,394,524
Significant Unobservable Inputs (Level 3) | Measured on non-recurring basis
Fair Value
Impaired loans	1,213
Mortgage servicing rights	$ 2,057	$ 1,338
Significant Unobservable Inputs (Level 3) | Contracted sale price of collateral | Measured on non-recurring basis | Other
Unobservable Inputs
Impaired loans	0
Significant Unobservable Inputs (Level 3) | Contracted sale price of collateral | Measured on non-recurring basis | Weighted Average | Other
Unobservable Inputs
Impaired loans	0
Significant Unobservable Inputs (Level 3) | Prepayment speeds and discount rates | Measured on non-recurring basis | Minimum | Discounted cash flow
Unobservable Inputs
Mortgage servicing rights	0.075	0.097
Significant Unobservable Inputs (Level 3) | Prepayment speeds and discount rates | Measured on non-recurring basis | Maximum | Discounted cash flow
Unobservable Inputs
Mortgage servicing rights	0.250	0.262
Significant Unobservable Inputs (Level 3) | Prepayment speeds and discount rates | Measured on non-recurring basis | Weighted Average | Discounted cash flow
Unobservable Inputs
Mortgage servicing rights	0.123	0.167
Significant Unobservable Inputs (Level 3) | Discount rate | Measured on non-recurring basis | Weighted Average | Discounted cash flow
Unobservable Inputs
Mortgage servicing rights	0.1025

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Fair Value Measurements - Fair Value on Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financial assets:
Debt securities available for sale, at fair value	$ 1,764,866	$ 1,316,952
Debt securities held to maturity	417,268	277,091
Equity securities	2,785	5,418
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	298,488	422,957
Debt securities available for sale, at fair value	35,194	25,549
Debt securities held to maturity	0	5,001
Equity securities	2,439	5,072
Federal Home Loan Bank stock	0	0
Loans receivable, net	0	0
Derivative assets	0	0
Financial liabilities:
Deposits	0	0
Borrowings	0	0
Derivative liabilities	0	0
Significant Other Observable Inputs (Level 2)
Financial assets:
Cash and cash equivalents	0	0
Debt securities available for sale, at fair value	1,729,672	1,291,403
Debt securities held to maturity	417,268	272,090
Equity securities	346	346
Federal Home Loan Bank stock	40,891	43,759
Loans receivable, net	0	0
Derivative assets	11,464	19,425
Financial liabilities:
Deposits	7,224,770	6,793,034
Borrowings	753,800	808,853
Derivative liabilities	25,068	42,384
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	6,230,842	6,394,524
Derivative assets	0	0
Financial liabilities:
Deposits	0	0
Borrowings	0	0
Derivative liabilities	0	0
Carrying Value
Financial assets:
Cash and cash equivalents	298,488	422,957
Debt securities available for sale, at fair value	1,764,866	1,316,952
Debt securities held to maturity	408,088	262,720
Equity securities	2,785	5,418
Federal Home Loan Bank stock	40,891	43,759
Loans receivable, net	6,013,968	6,107,094
Derivative assets	11,464	19,425
Financial liabilities:
Deposits	7,222,358	6,778,624
Borrowings	749,631	799,364
Derivative liabilities	25,068	42,384
Total Fair Value
Financial assets:
Cash and cash equivalents	298,488	422,957
Debt securities available for sale, at fair value	1,764,866	1,316,952
Debt securities held to maturity	417,268	277,091
Equity securities	2,785	5,418
Federal Home Loan Bank stock	40,891	43,759
Loans receivable, net	6,230,842	6,394,524
Derivative assets	11,464	19,425
Financial liabilities:
Deposits	7,224,770	6,793,034
Borrowings	753,800	808,853
Derivative liabilities	$ 25,068	$ 42,384

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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, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Before Tax
Other comprehensive income (loss)	$ (7,756)	$ (43,955)	$ 20,335	$ (24,291)
Tax Effect
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	2,168	9,233	435	5,097
After Tax
Total other comprehensive (loss) income	(5,588)	(34,722)	20,770	(19,194)
Unrealized Gains on Debt Securities Available for Sale
Before Tax
Other comprehensive income (loss), before reclassifications	(13,609)	(3,688)	(26,804)	28,736
Other comprehensive income (loss)	(11,316)	(3,692)	(24,813)	29,107
Tax Effect
Other comprehensive income (loss), before reclassifications	3,666	775	4,615	(6,031)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	3,162	775	4,213	(6,112)
After Tax
Other comprehensive income (loss), before reclassifications	(9,943)	(2,913)	(22,189)	22,705
Total other comprehensive (loss) income	(8,154)	(2,917)	(20,600)	22,995
AOCI, Accumulated Gain (Loss), Debt Securities Available-for-sale, Accretion of Unrealized Gains (Losses), Parent
Before Tax
Reclassification from AOCI, current period	(3)	(4)	(24)	1
Tax Effect
Reclassification from AOCI, current period	1	0	24	0
After Tax
Reclassification from AOCI, current period	(2)	(4)	0	1
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Other Reclassifications, Parent
Before Tax
Reclassification from AOCI, current period	2,296	0	2,015	370
Tax Effect
Reclassification from AOCI, current period	(505)	0	(426)	(81)
After Tax
Reclassification from AOCI, current period	1,791	0	1,589	289
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Before Tax
Other comprehensive income (loss), before reclassifications	2,035	2,256	9,182	(13,050)
Tax Effect
Other comprehensive income (loss), before reclassifications	(568)	(471)	(1,084)	2,736
After Tax
Other comprehensive income (loss), before reclassifications	1,467	1,785	8,098	(10,314)
Total other comprehensive (loss) income	1,467	1,785	8,098	(10,314)
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	4	3	11	10
After Tax
Reclassification from AOCI, current period	(10)	(11)	(31)	(32)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent
Before Tax
Reclassification from AOCI, current period	(1,511)	(1,071)	(4,533)	(3,213)
Tax Effect
Reclassification from AOCI, current period	422	225	1,266	674
After Tax
Reclassification from AOCI, current period	(1,089)	(846)	(3,267)	(2,539)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Before Tax
Other comprehensive income (loss), before reclassifications	3,050	(41,434)	40,541	(37,093)
Other comprehensive income (loss)	1,525	(42,519)	35,966	(40,348)
Tax Effect
Other comprehensive income (loss), before reclassifications	(852)	8,701	(3,971)	7,789
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	(426)	8,929	(2,694)	8,473
After Tax
Other comprehensive income (loss), before reclassifications	2,198	(32,733)	36,570	(29,304)
Total other comprehensive (loss) income	$ 1,099	$ (33,590)	$ 33,272	$ (31,875)

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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, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 1,033,046	$ 1,040,988	$ 1,011,287	$ 982,517
Current period changes in other comprehensive income (loss)	(5,588)	(34,722)	20,770	(19,194)
Balance at end of year	1,030,876	1,017,330	1,030,876	1,017,330
Accumulated Other Comprehensive (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(43,267)	(53,207)	(69,625)	(68,735)
Current period changes in other comprehensive income (loss)	(5,588)	(34,722)	20,770	(19,194)
Balance at end of year	(48,855)	(87,929)	(48,855)	(87,929)
Unrealized Gains on Debt Securities Available for Sale
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	18,582	35,225	31,028	9,313
Current period changes in other comprehensive income (loss)	(8,154)	(2,917)	(20,600)	22,995
Balance at end of year	10,428	32,308	10,428	32,308
Unrealized (Losses) on Swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(10,225)	(20,573)	(16,856)	(8,474)
Current period changes in other comprehensive income (loss)	1,467	1,785	8,098	(10,314)
Balance at end of year	(8,758)	(18,788)	(8,758)	(18,788)
Employee Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(51,624)	(67,859)	(83,797)	(69,574)
Current period changes in other comprehensive income (loss)	1,099	(33,590)	33,272	(31,875)
Balance at end of year	$ (50,525)	$ (101,449)	$ (50,525)	$ (101,449)

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Other Comprehensive Income (Loss) - Reclassification out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain on securities transactions	$ 2,296	$ 0	$ 2,015	$ 370
Other non-interest expense	1,809	3,862	8,076	9,757
Total before tax	28,694	20,339	94,228	49,056
Income (tax) benefit	(7,712)	(5,252)	(25,513)	(12,107)
Net income	20,982	15,087	68,715	36,949
Accumulated Other Comprehensive Income (Loss) Components
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total before tax	785	(1,071)	(2,518)	(2,843)
Income (tax) benefit	(83)	225	840	593
Net income	702	(846)	(1,678)	(2,250)
Accumulated Other Comprehensive Income (Loss) Components | Reclassification adjustment for gain included in net income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain on securities transactions	2,296	0	2,015	370
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	$ (1,511)	$ (1,071)	$ (4,533)	$ (3,213)

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Derivatives and Hedging Activities - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($) swap	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) swap	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($) swap
Derivative [Line Items]
Accrued interest on derivatives, at fair value	$ 1,000,000		$ 1,000,000		$ 1,000,000
Derivative, net liability position, aggregate fair value	12,600,000		12,600,000
Derivative, collateral, right to reclaim cash	24,100,000		24,100,000
Currency forward contract - non-designated hedge | Not-designated hedge
Derivative [Line Items]
Notional amount of derivative	0		0		0
Interest Rate Swap
Derivative [Line Items]
Derivative loss (gain) on derivative, net	12,000	$ (44,000)	(189,000)	$ 406,000
Interest Rate Swap | Not-designated hedge
Derivative [Line Items]
Notional amount of derivative	$ 180,100,000		$ 180,100,000		$ 180,100,000
Number of commercial banking customers | swap	50		50		50
Interest Rate Swap | Designated as Hedging Instrument | Federal Home Loan Bank Advances
Derivative [Line Items]
Notional amount of derivative	$ 400,000,000		$ 400,000,000		$ 430,000,000
Number of interest rate derivatives held | swap	28		28		31

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Derivatives and Hedging Activities - Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Interest rate swaps | Designated as Hedging Instrument | Other Assets
Derivatives, Fair Value [Line Items]
Derivative assets	$ 11,464	$ 19,425
Interest rate swaps | Designated as Hedging Instrument | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	25,068	42,384
Reported Value Measurement
Derivatives, Fair Value [Line Items]
Derivative assets	11,464	19,425
Derivative liabilities	$ 25,068	$ 42,384

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Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Total out-of-scope non-interest income	$ 4,523	$ 4,155	$ 18,991	$ 10,469
Total non-interest income	8,874	7,909	31,860	21,308
Deposit Account, Title Insurance and Other Non-Interest Income
Disaggregation of Revenue [Line Items]
Revenue	4,351	3,754	12,869	10,839
Demand deposit account fees
Disaggregation of Revenue [Line Items]
Revenue	986	787	2,682	2,706
Title insurance fees
Disaggregation of Revenue [Line Items]
Revenue	1,431	1,218	4,554	3,445
Other non-interest income
Disaggregation of Revenue [Line Items]
Revenue	$ 1,934	$ 1,749	$ 5,633	$ 4,688