Columbia Financial (CLBK) 10-Q 10 May 24 2024 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2024	May 03, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
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	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		104,814,870
Entity Central Index Key	0001723596
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period	Q1
Amendment Flag	false

Consolidated Statements of Fina

Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets
Cash and due from banks	$ 373,362	$ 423,140
Short-term investments	110	109
Total cash and cash equivalents	373,472	423,249
Debt securities available for sale, at fair value	1,187,440	1,093,557
Debt securities held to maturity, at amortized cost (fair value of $351,991 and $357,177 at March 31, 2024 and December 31, 2023, respectively)	398,351	401,154
Equity securities, at fair value	4,430	4,079
Federal Home Loan Bank stock	80,859	81,022
Loans receivable	7,815,629	7,874,537
Less: allowance for credit losses	55,401	55,096
Loans receivable, net	7,760,228	7,819,441
Accrued interest receivable	41,585	39,345
Office properties and equipment, net	83,234	83,577
Bank-owned life insurance ("BOLI")	270,144	268,362
Goodwill and intangible assets	122,730	123,350
Other assets	315,046	308,432
Total assets	10,637,519	10,645,568
Liabilities:
Deposits	7,829,403	7,846,556
Borrowings	1,530,424	1,528,695
Advance payments by borrowers for taxes and insurance	45,907	43,509
Accrued expenses and other liabilities	193,760	186,473
Total liabilities	9,599,494	9,605,233
Stockholders' equity:
Preferred stock, $0.01 par value. 10,000,000 shares authorized; none issued and outstanding at March 31, 2024 and December 31, 2023	0	0
Common stock, $0.01 par value. 500,000,000 shares authorized; 131,370,633 shares issued and 105,022,806 shares outstanding at March 31, 2024 and 131,155,268 shares issued and 104,918,905 shares outstanding at December 31, 2023	1,314	1,312
Additional paid-in capital	793,878	791,450
Retained earnings	892,449	893,604
Accumulated other comprehensive loss	(160,837)	(158,735)
Treasury stock, at cost; 26,347,827 shares at March 31, 2024 and 26,236,363 shares at December 31, 2023	(455,948)	(454,128)
Common stock held by the Employee Stock Ownership Plan	(31,914)	(32,478)
Stock held by Rabbi Trust	(3,041)	(2,955)
Deferred compensation obligations	2,124	2,265
Total stockholders' equity	1,038,025	1,040,335
Total liabilities and stockholders' equity	$ 10,637,519	$ 10,645,568

Consolidated Statements of Fi_2

Consolidated Statements of Financial Condition (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Debt securities held to maturity	$ 351,991	$ 357,177
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)	131,370,633	131,155,268
Common stock, shares outstanding (in shares)	105,022,806	104,918,905
Treasury stock, shares (in shares)	26,347,827	26,236,363

Consolidated Statements of Inco

Consolidated Statements of Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Interest income:
Loans receivable	$ 92,949	$ 80,290
Debt securities available for sale and equity securities	7,785	8,451
Debt securities held to maturity	2,369	2,457
Federal funds and interest-earning deposits	3,563	812
Federal Home Loan Bank stock dividends	1,961	870
Total interest income	108,627	92,880
Interest expense:
Deposits	48,418	17,088
Borrowings	18,009	14,928
Total interest expense	66,427	32,016
Net interest income	42,200	60,864
Provision for credit losses	5,278	175
Net interest income after provision for credit losses	36,922	60,689
Non-interest income:
Bank-owned life insurance	1,780	1,981
Loan fees and service charges	961	1,072
Loss on securities transactions	(1,256)	(1,295)
Change in fair value of equity securities	351	168
Gain on sale of loans	185	791
Other non-interest income	3,515	3,593
Total non-interest income	7,452	8,073
Non-interest expense:
Compensation and employee benefits	27,513	31,158
Occupancy	5,973	5,754
Federal deposit insurance premiums	2,355	689
Advertising	626	687
Professional fees	4,634	1,875
Data processing and software expenses	3,967	3,825
Merger-related expenses	22	0
Other non-interest expense, net	568	(87)
Total non-interest expense	45,658	43,901
(Loss) income before income tax expense	(1,284)	24,861
Income tax (benefit) expense	(129)	6,138
Net (loss) income	$ (1,155)	$ 18,723
(Loss) earnings per share - basic (in dollars per share)	$ (0.01)	$ 0.18
(Loss) earnings per share - diluted (in dollars per share)	$ (0.01)	$ 0.18
Weighted average shares outstanding - basic (in shares)	101,746,740	104,631,583
Weighted average shares outstanding - diluted (in shares)	101,988,425	105,148,375
Demand deposit account fees
Non-interest income:
Revenue from contract with customer	$ 1,413	$ 1,176
Title insurance fees
Non-interest income:
Revenue from contract with customer	$ 503	$ 587

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (1,155)	$ 18,723
Other comprehensive income (loss), net of tax:
Unrealized (loss) gain on debt securities available for sale	(4,992)	13,069
Accretion of unrealized gain (loss) on debt securities reclassified as held to maturity	4	(7)
Reclassification adjustment for (loss) gain included in net income	(903)	(929)
Total other comprehensive (loss) income, net of tax	(5,891)	12,133
Derivatives, net of tax:
Unrealized gain (loss) on swap contracts accounted for as cash flow hedges	3,760	(865)
Total derivative, net of tax	3,760	(865)
Employee benefit plans, net of tax:
Amortization of prior service cost included in net income	(10)	(10)
Reclassification adjustment of actuarial net (loss) gain included in net income	(384)	1
Change in funded status of retirement obligations	423	179
Total employee benefit plans, net of tax	29	170
Total other comprehensive (loss) income	(2,102)	11,438
Total comprehensive (loss) income, net of tax	$ (3,257)	$ 30,161

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholder's Equity (Unaudited) - USD ($) $ in Thousands	Total	Restricted Stock	Common Stock	Common Stock Restricted Stock	Additional Paid-in Capital	Additional Paid-in Capital Restricted Stock	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, 2022	$ 1,053,595		$ 1,309		$ 781,165		$ 857,518	$ (179,296)	$ (371,708)	$ (34,750)	$ (3,149)	$ 2,506
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	18,723						18,723
Other comprehensive income (loss)	11,438							11,438
Stock based compensation	1,845				1,845
Purchase of treasury stock	(47,323)								(47,323)
Exercise of stock options	11				11
Restricted stock forfeitures	0				39				(39)
Repurchase shares for taxes	(133)								(133)
Excise tax on net stock repurchases	(475)								(475)
Employee Stock Ownership Plan shares committed to be released	1,142				582					560
Funding of deferred compensation obligations	67										481	(414)
Balance at end of year at Mar. 31, 2023	1,038,890		1,309		783,642		876,241	(167,858)	(419,678)	(34,190)	(2,668)	2,092
Balance at beginning of period at Dec. 31, 2023	1,040,335		1,312		791,450		893,604	(158,735)	(454,128)	(32,478)	(2,955)	2,265
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(1,155)						(1,155)
Other comprehensive income (loss)	(2,102)							(2,102)
Issuance of common stock allocated to restricted stock award grants		$ 0		$ 2		$ (2)
Stock based compensation	2,029				2,029
Purchase of treasury stock	(1,652)								(1,652)
Exercise of stock options	(49)				(49)
Restricted stock forfeitures	0				27				(27)
Repurchase shares for taxes	(139)								(139)
Excise tax on net stock repurchases	(2)								(2)
Employee Stock Ownership Plan shares committed to be released	987				423					564
Funding of deferred compensation obligations	(227)										(86)	(141)
Balance at end of year at Mar. 31, 2024	$ 1,038,025		$ 1,314		$ 793,878		$ 892,449	$ (160,837)	$ (455,948)	$ (31,914)	$ (3,041)	$ 2,124

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholder's Equity (Unaudited) (Parenthetical) - shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Stockholders' Equity [Abstract]
Issuance of common stock (in shares)	212,441
Purchase of treasury stock (in shares)	101,516	2,378,434
Exercise of stock options (in shares)	28,051	3,618
Restricted stock forfeitures (in shares)	1,545	1,929
Repurchased shares for taxes (in shares)	8,403	7,068

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities:
Net (loss) income	$ (1,155,000)	$ 18,723,000
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of deferred loan costs, fees and purchased premiums and discounts	1,195,000	1,372,000
Net amortization of premiums and discounts on securities	(76,000)	511,000
Net amortization of mortgage servicing rights	59,000	55,000
Amortization of intangible assets	563,000	602,000
Depreciation and amortization of office properties and equipment	2,014,000	1,874,000
Amortization of operating lease right-of-use assets	987,000	973,000
Provision for credit losses	5,278,000	175,000
Loss on securities transactions	1,256,000	1,295,000
Change in fair value of equity securities	(351,000)	(168,000)
Gain on sale of loans, net	(185,000)	(791,000)
Net loss on disposal of office properties and equipment	0	7,000
Increase in accrued interest receivable	(2,240,000)	(1,228,000)
Increase in other assets	(4,424,000)	(14,166,000)
Increase (decrease) in accrued expenses and other liabilities	10,206,000	(13,915,000)
Income on bank-owned life insurance	(1,780,000)	(1,981,000)
Employee stock ownership plan expense	987,000	1,142,000
Stock based compensation	2,029,000	1,845,000
(Increase) decrease in deferred compensation obligations under Rabbi Trust	(227,000)	67,000
Net cash provided by (used in) operating activities	14,136,000	(3,608,000)
Cash flows from investing activities:
Proceeds from sales of debt securities available for sale	3,495,000	42,625,000
Proceeds from paydowns/maturities/calls of debt securities available for sale	31,069,000	27,888,000
Proceeds from paydowns/maturities/calls of debt securities held to maturity	2,783,000	4,277,000
Purchases of debt securities available for sale	(137,807,000)	0
Proceeds from sales of loans held-for-sale	3,690,000	35,059,000
Purchases of loans receivable	0	(14,729,000)
Net decrease (increase) in loans receivable	49,233,000	(130,620,000)
Proceeds from bank-owned life insurance death benefits	(2,000)	336,000
Proceeds from redemptions of Federal Home Loan Bank stock	11,413,000	20,207,000
Purchases of Federal Home Loan Bank stock	(11,250,000)	(46,892,000)
Additions to office properties and equipment	(1,671,000)	(1,725,000)
Net cash (used in) investing activities	(49,047,000)	(63,574,000)
Cash flows from financing activities:
Net decrease in deposits	(17,153,000)	(326,958,000)
Proceeds from long-term borrowings	60,000,000	111,113,000
Payments on long-term borrowings	(15,000,000)	(10,000,000)
Net (decrease) increase in short-term borrowings	(43,271,000)	478,453,000
Increase in advance payments by borrowers for taxes and insurance	2,398,000	2,230,000
Exercise of stock options	(49,000)	11,000
Purchase of treasury stock	(1,652,000)	(47,323,000)
Repurchase of shares for taxes	(139,000)	(133,000)
Net cash (used in) provided by financing activities	(14,866,000)	207,393,000
Net (decrease) increase in cash and cash equivalents	(49,777,000)	140,211,000
Cash and cash equivalents at beginning of year	423,249,000	179,228,000
Cash and cash equivalents at end of period	373,472,000	319,439,000
Cash paid during the period for:
Interest on deposits and borrowings	66,080,000	27,936,000
Income tax payments, net of refunds	658,000	577,000
Non-cash investing and financing activities:
Transfer of loans receivable to loans held-for-sale	3,507,000	34,364,000
Excise tax on net stock repurchases	$ 2,000	$ 475,000

Basis of Financial Statement Pr

Basis of Financial Statement Presentation	3 Months Ended
	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Financial Statement Presentation	Basis of Financial Statement Presentation The accompanying consolidated financial statements include the accounts of Columbia Financial, Inc. ("Columbia Financial"), its wholly-owned subsidiaries, Columbia Bank ("Columbia") and Freehold Bank ("Freehold"), and Columbia's wholly-owned subsidiaries, Columbia Investment Services, Inc., 2500 Broadway Corp., 1901 Residential Management Co. LLC, First Jersey Title Services, Inc., 1901 Commercial Management Co. LLC, Stewardship Realty LLC, CSB Realty Corp., and RSI Insurance Agency, Inc., (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, significant judgments 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 judgments and estimates under different conditions, resulting in a change that could have a material impact on the carrying values of our assets and liabilities and our results of operations. Material estimates that involve significant judgments and assumptions 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, significant judgments 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 month period ended March 31, 2024 are not necessarily indicative of the results of operations that may be expected for the entire fiscal year or any other period. 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.

Acquisitions

Acquisitions	3 Months Ended
	Mar. 31, 2024
Business Combination and Asset Acquisition [Abstract]
Acquisitions	Acquisitions Freehold Bank On December 1, 2021, the Company completed its acquisition of Freehold Bancorp, MHC, Freehold Bancorp, Inc. and Freehold Bank (collectively, the "Freehold Entities" or "Freehold"). Pursuant to the terms of the merger agreement, Freehold Bancorp, MHC merged with and into the MHC, with the MHC as the surviving entity; and Freehold Bancorp, Inc. merged with and into Columbia Financial, with Columbia Financial as the surviving entity. In connection with the merger, Freehold Bank converted to a federal savings bank and operates as a wholly-owned subsidiary of Columbia Financial. The Company intends to merge Freehold Bank into Columbia Bank at a future date that has not yet been determined. Under the terms of the merger agreement, upon the subsequent merger of the two banks, depositors of Freehold Bank will become depositors of Columbia Bank and will have the same rights and privileges in the MHC as if their accounts had been established at Columbia Bank on the date established at Freehold Bank. The Company issued 2,591,007 shares of its common stock to the MHC, representing an amount equal to the fair value of the Freehold Entities as determined by an independent appraiser, at the effective time of the holding company mergers.

Earnings per Share

Earnings per Share	3 Months Ended
	Mar. 31, 2024
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 months ended March 31, 2024 and 2023: For the Three Months Ended March 31, 2024 2023 (In thousands, except per share data) Net (loss) income $ (1,155) $ 18,723 Shares: Weighted average shares outstanding - basic 101,746,740 104,631,583 Weighted average diluted shares outstanding 241,685 516,792 Weighted average shares outstanding - diluted 101,988,425 105,148,375 Earnings per share: Basic $ (0.01) $ 0.18 Diluted $ (0.01) $ 0.18 During the three months ended March 31, 2024 and 2023, 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 823,566 and 348,101, respectively.

Stock Repurchase Program

Stock Repurchase Program	3 Months Ended
	Mar. 31, 2024
Equity [Abstract]
Stock Repurchase Program	Stock Repurchase Program On December 14, 2022, the Company announced that its Board of Directors authorized the Company's fifth stock repurchase program to acquire up to 3,000,000 shares, or approximately 2.7% of the Company's then issued and outstanding common stock, commencing upon the completion of the Company’s fourth stock repurchase program. As of March 31, 2024, all shares were repurchased under this program. On May 25, 2023, the Company announced that its Board of Directors authorized the Company's sixth stock repurchase program to acquire up to 2,000,000 shares, or approximately 1.9% of the Company's then issued and outstanding common stock. As of March 31, 2024, there were 1,005,325 shares remaining to be purchased under this program.

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2024
Accounting Standards Update and Change in Accounting Principle [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Accounting Pronouncements Adopted In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280); Improvements to Reportable Segment Disclosures. ASU 2023-07 enhances segment reporting under Topic 820 by expanding the breadth and frequency of segment disclosures. The ASU requires a public entity to disclosure entity-wide and segment information in the notes to the financial statements. Disclosures include the measure of profit or loss that the chief operating decision maker uses to assess segment performance and decisions how to allocate resources, as well as certain specified amounts included in that measure. This ASU was effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. The Company adopted this ASU on January 1, 2024 on a retrospective basis for all periods presented. As it is only disclosure related, this ASU did not have an impact on the Company's consolidated financial statements.

Debt Securities Available for S

Debt Securities Available for Sale	3 Months Ended
	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Debt Securities Available for Sale	Debt Securities Available for Sale D ebt securities available for sale at March 31, 2024 and December 31, 2023 are summarized as follows: March 31, 2024 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value (In thousands) U.S. government and agency obligations $ 239,128 $ 225 $ (2,319) $ 237,034 Mortgage-backed securities and collateralized mortgage obligations 1,018,854 1 (149,638) 869,217 Municipal obligations 2,768 — (60) 2,708 Corporate debt securities 92,548 — (14,067) 78,481 $ 1,353,298 $ 226 $ (166,084) $ 1,187,440 December 31, 2023 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value (In thousands) U.S. government and agency obligations $ 146,387 $ 924 $ (1,810) $ 145,501 Mortgage-backed securities and collateralized mortgage obligations 1,009,508 20 (141,943) 867,585 Municipal obligations 2,770 — (68) 2,702 Corporate debt securities 92,565 2 (14,798) 77,769 $ 1,251,230 $ 946 $ (158,619) $ 1,093,557 6. Debt Securities Available for Sale (continued) The amortized cost and fair value of debt securities available for sale at March 31, 2024, 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. March 31, 2024 Amortized Cost Fair Value (In thousands) One year or less $ 65,637 $ 65,638 More than one year to five years 200,010 196,755 More than five years to ten years 68,797 55,830 $ 334,444 $ 318,223 Mortgage-backed securities and collateralized mortgage obligations 1,018,854 869,217 $ 1,353,298 $ 1,187,440 Mortgage-backed securities and collateralized mortgage obligations totaling $1.0 billion at amortized cost, and $869.2 million 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 March 31, 2024, proceeds from the sale of a debt security available for sale totaled $3.5 million, resulting in no gross gains and $1.3 million of gross losses. There were no calls and one matured debt security available for sale totaling $10.0 million, during the three months ended March 31, 2024. During the three months ended March 31, 2023, proceeds from the sale of debt securities available for sale totaled $42.6 million, resulting in no gross gains and $1.3 million of gross losses. There were no calls or matured debt securities available for sale during the three months ended March 31, 2023. Debt securities available for sale having a carrying value of $224.9 million and $211.5 million, at March 31, 2024 and December 31, 2023, respectively, were pledged as security for public funds on deposit at Columbia 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. Debt securities available for sale having a carrying value of $66.0 million and $75.1 million, at March 31, 2024 and December 31, 2023, respectively, were pledged by Freehold Bank for outstanding borrowings at the Federal Home Loan Bank, and 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 March 31, 2024 and December 31, 2023 and if the unrealized loss position was continuous for the twelve months prior to those respective dates: March 31, 2024 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 $ 102,990 $ (440) $ 25,704 $ (1,879) $ 128,694 $ (2,319) Mortgage-backed securities and collateralized mortgage obligations 28,787 (129) 840,015 (149,509) 868,802 (149,638) Municipal obligations — — 2,708 (60) 2,708 (60) Corporate debt securities — — 78,481 (14,067) 78,481 (14,067) $ 131,777 $ (569) $ 946,908 $ (165,515) $ 1,078,685 $ (166,084) 6. Debt Securities Available for Sale (continued) December 31, 2023 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 $ — $ — $ 21,344 $ (1,810) $ 21,344 $ (1,810) Mortgage-backed securities and collateralized mortgage obligations 54 (4) 863,026 (141,939) 863,080 (141,943) Municipal obligations — — 2,702 (68) 2,702 (68) Corporate debt securities — — 75,765 (14,798) 75,765 (14,798) $ 54 $ (4) $ 962,837 $ (158,615) $ 962,891 $ (158,619) The number of securities in an unrealized loss position at March 31, 2024 totaled 349, compared with 329 at December 31, 2023. All temporarily impaired securities were investment grade as of March 31, 2024 and December 31, 2023, except two corporate debt securities which were rated BB+, totaling approximately $8.1 million at both March 31, 2024 and December 31, 2023. For available for sale securities, the Company assesses whether a loss is from credit or other factors and considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency and adverse conditions related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows is less than the amortized cost, a credit loss would be recorded through an allowance for credit losses, limited by the amount that the fair value is less than the amortized cost basis. There was no activity in the allowance for credit losses on debt securities available for sale for the three months ended March 31, 2024 and 2023. The Company made an accounting policy election to exclude accrued interest receivable from the amortized cost basis of debt securities available for sale. Accrued interest receivable on debt securities available for sale is reported as a component of accrued interest receivable on the Consolidated Statement of Financial Condition, which totaled $4.8 million and $3.7 million at March 31, 2024 and December 31, 2023, respectively, and is excluded from the estimate of credit losses. Debt securities held to maturity at March 31, 2024 and December 31, 2023 are summarized as follows: March 31, 2024 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Allowance for Credit Losses Fair Value U.S. government and agency obligations $ 49,871 $ — $ (6,064) $ — $ 43,807 Mortgage-backed securities and collateralized mortgage obligations 348,480 — (40,296) — 308,184 $ 398,351 $ — $ (46,360) $ — $ 351,991 7. Debt Securities Held to Maturity (continued) December 31, 2023 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Allowance for Credit Losses Fair Value (In thousands) U.S. government and agency obligations $ 49,871 $ — $ (5,902) $ — $ 43,969 Mortgage-backed securities and collateralized mortgage obligations 351,283 — (38,075) — 313,208 $ 401,154 $ — $ (43,977) $ — $ 357,177 The amortized cost and fair value of debt securities held to maturity at March 31, 2024, 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. March 31, 2024 Amortized Cost Fair Value (In thousands) More than one year to five years $ 29,875 $ 27,610 More than five years to ten years 9,996 8,483 More than ten years 10,000 7,714 49,871 43,807 Mortgage-backed securities and collateralized mortgage obligations 348,480 308,184 $ 398,351 $ 351,991 Mortgage-backed securities and collateralized mortgage obligations totaling $348.5 million at amortized cost, and $308.2 million at fair value at March 31, 2024, 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 months ended March 31, 2024 and 2023 there were no sales, calls or maturities of debt securities held to maturity. Debt securities held to maturity having a carrying value of $213.0 million and $202.9 million, at March 31, 2024 and December 31, 2023, respectively, were pledged as security for public funds on deposit at Columbia Bank as required and permitted by law, pledged for outstanding borrowings at the Federal Home Loan Bank, and pledged for potential borrowings at the Federal Reserve Bank of New York. 7. Debt Securities Held to Maturity (continued) The following tables summarize the fair value and gross unrealized losses of those securities that reported an unrealized loss at March 31, 2024 and December 31, 2023 and if the unrealized loss position was continuous for the twelve months prior to those respective dates: March 31, 2024 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 $ — $ — $ 43,807 $ (6,064) $ 43,807 $ (6,064) Mortgage-backed securities and collateralized mortgage obligations — — 308,183 (40,296) 308,183 (40,296) $ — $ — $ 351,990 $ (46,360) $ 351,990 $ (46,360) December 31, 2023 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 $ — $ — $ 43,969 $ (5,902) $ 43,969 $ (5,902) Mortgage-backed securities and collateralized mortgage obligations — — 313,208 (38,075) 313,208 (38,075) $ — $ — $ 357,177 $ (43,977) $ 357,177 $ (43,977) The number of securities in an unrealized loss position at March 31, 2024 totaled 111, compared with 108 at December 31, 2023. All temporarily impaired securities were investment grade as of March 31, 2024 and December 31, 2023. For held to maturity securities, management measures expected credit losses on a collective basis by major security type. All of the mortgage-backed securities are issued by U.S. government agencies and are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major rating agencies and have a long history of no credit losses and, therefore, the expectation of non-payment is zero and the Company is not required to estimate an allowance for credit losses on these securities under the CECL standard. All these securities reflect a credit quality rating of AAA by Moody's Investors Service. The Company made an accounting policy election to exclude accrued interest receivable from the amortized cost basis of debt securities held to maturity. Accrued interest receivable on debt securities held to maturity is reported as a component of accrued interest receivable on the Consolidated Statement of Financial Condition, which totaled $941,000 and $997,000 at March 31, 2024 and December 31, 2023, respectively, and is excluded from the estimate of credit losses. 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, preferred stock in U.S. Government agencies, and a Community Reinvestment Act qualifying bond fund which are reported at fair value on the Company's Consolidated Statements of Financial Condition. The fair value of the equities portfolio at March 31, 2024 and December 31, 2023 was $4.4 million and $4.1 million, respectively. 8. Equity Securities at Fair Value (continued) The Company recorded a net increase in the fair value of equity securities of $351,000 and $168,000, during the three months ended March 31, 2024 and 2023, respectively, as a component of non-interest income.

Debt Securities Held to Maturit

Debt Securities Held to Maturity	3 Months Ended
	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Debt Securities Held to Maturity	Debt Securities Available for Sale D ebt securities available for sale at March 31, 2024 and December 31, 2023 are summarized as follows: March 31, 2024 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value (In thousands) U.S. government and agency obligations $ 239,128 $ 225 $ (2,319) $ 237,034 Mortgage-backed securities and collateralized mortgage obligations 1,018,854 1 (149,638) 869,217 Municipal obligations 2,768 — (60) 2,708 Corporate debt securities 92,548 — (14,067) 78,481 $ 1,353,298 $ 226 $ (166,084) $ 1,187,440 December 31, 2023 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value (In thousands) U.S. government and agency obligations $ 146,387 $ 924 $ (1,810) $ 145,501 Mortgage-backed securities and collateralized mortgage obligations 1,009,508 20 (141,943) 867,585 Municipal obligations 2,770 — (68) 2,702 Corporate debt securities 92,565 2 (14,798) 77,769 $ 1,251,230 $ 946 $ (158,619) $ 1,093,557 6. Debt Securities Available for Sale (continued) The amortized cost and fair value of debt securities available for sale at March 31, 2024, 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. March 31, 2024 Amortized Cost Fair Value (In thousands) One year or less $ 65,637 $ 65,638 More than one year to five years 200,010 196,755 More than five years to ten years 68,797 55,830 $ 334,444 $ 318,223 Mortgage-backed securities and collateralized mortgage obligations 1,018,854 869,217 $ 1,353,298 $ 1,187,440 Mortgage-backed securities and collateralized mortgage obligations totaling $1.0 billion at amortized cost, and $869.2 million 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 March 31, 2024, proceeds from the sale of a debt security available for sale totaled $3.5 million, resulting in no gross gains and $1.3 million of gross losses. There were no calls and one matured debt security available for sale totaling $10.0 million, during the three months ended March 31, 2024. During the three months ended March 31, 2023, proceeds from the sale of debt securities available for sale totaled $42.6 million, resulting in no gross gains and $1.3 million of gross losses. There were no calls or matured debt securities available for sale during the three months ended March 31, 2023. Debt securities available for sale having a carrying value of $224.9 million and $211.5 million, at March 31, 2024 and December 31, 2023, respectively, were pledged as security for public funds on deposit at Columbia 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. Debt securities available for sale having a carrying value of $66.0 million and $75.1 million, at March 31, 2024 and December 31, 2023, respectively, were pledged by Freehold Bank for outstanding borrowings at the Federal Home Loan Bank, and 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 March 31, 2024 and December 31, 2023 and if the unrealized loss position was continuous for the twelve months prior to those respective dates: March 31, 2024 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 $ 102,990 $ (440) $ 25,704 $ (1,879) $ 128,694 $ (2,319) Mortgage-backed securities and collateralized mortgage obligations 28,787 (129) 840,015 (149,509) 868,802 (149,638) Municipal obligations — — 2,708 (60) 2,708 (60) Corporate debt securities — — 78,481 (14,067) 78,481 (14,067) $ 131,777 $ (569) $ 946,908 $ (165,515) $ 1,078,685 $ (166,084) 6. Debt Securities Available for Sale (continued) December 31, 2023 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 $ — $ — $ 21,344 $ (1,810) $ 21,344 $ (1,810) Mortgage-backed securities and collateralized mortgage obligations 54 (4) 863,026 (141,939) 863,080 (141,943) Municipal obligations — — 2,702 (68) 2,702 (68) Corporate debt securities — — 75,765 (14,798) 75,765 (14,798) $ 54 $ (4) $ 962,837 $ (158,615) $ 962,891 $ (158,619) The number of securities in an unrealized loss position at March 31, 2024 totaled 349, compared with 329 at December 31, 2023. All temporarily impaired securities were investment grade as of March 31, 2024 and December 31, 2023, except two corporate debt securities which were rated BB+, totaling approximately $8.1 million at both March 31, 2024 and December 31, 2023. For available for sale securities, the Company assesses whether a loss is from credit or other factors and considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency and adverse conditions related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows is less than the amortized cost, a credit loss would be recorded through an allowance for credit losses, limited by the amount that the fair value is less than the amortized cost basis. There was no activity in the allowance for credit losses on debt securities available for sale for the three months ended March 31, 2024 and 2023. The Company made an accounting policy election to exclude accrued interest receivable from the amortized cost basis of debt securities available for sale. Accrued interest receivable on debt securities available for sale is reported as a component of accrued interest receivable on the Consolidated Statement of Financial Condition, which totaled $4.8 million and $3.7 million at March 31, 2024 and December 31, 2023, respectively, and is excluded from the estimate of credit losses. Debt securities held to maturity at March 31, 2024 and December 31, 2023 are summarized as follows: March 31, 2024 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Allowance for Credit Losses Fair Value U.S. government and agency obligations $ 49,871 $ — $ (6,064) $ — $ 43,807 Mortgage-backed securities and collateralized mortgage obligations 348,480 — (40,296) — 308,184 $ 398,351 $ — $ (46,360) $ — $ 351,991 7. Debt Securities Held to Maturity (continued) December 31, 2023 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Allowance for Credit Losses Fair Value (In thousands) U.S. government and agency obligations $ 49,871 $ — $ (5,902) $ — $ 43,969 Mortgage-backed securities and collateralized mortgage obligations 351,283 — (38,075) — 313,208 $ 401,154 $ — $ (43,977) $ — $ 357,177 The amortized cost and fair value of debt securities held to maturity at March 31, 2024, 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. March 31, 2024 Amortized Cost Fair Value (In thousands) More than one year to five years $ 29,875 $ 27,610 More than five years to ten years 9,996 8,483 More than ten years 10,000 7,714 49,871 43,807 Mortgage-backed securities and collateralized mortgage obligations 348,480 308,184 $ 398,351 $ 351,991 Mortgage-backed securities and collateralized mortgage obligations totaling $348.5 million at amortized cost, and $308.2 million at fair value at March 31, 2024, 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 months ended March 31, 2024 and 2023 there were no sales, calls or maturities of debt securities held to maturity. Debt securities held to maturity having a carrying value of $213.0 million and $202.9 million, at March 31, 2024 and December 31, 2023, respectively, were pledged as security for public funds on deposit at Columbia Bank as required and permitted by law, pledged for outstanding borrowings at the Federal Home Loan Bank, and pledged for potential borrowings at the Federal Reserve Bank of New York. 7. Debt Securities Held to Maturity (continued) The following tables summarize the fair value and gross unrealized losses of those securities that reported an unrealized loss at March 31, 2024 and December 31, 2023 and if the unrealized loss position was continuous for the twelve months prior to those respective dates: March 31, 2024 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 $ — $ — $ 43,807 $ (6,064) $ 43,807 $ (6,064) Mortgage-backed securities and collateralized mortgage obligations — — 308,183 (40,296) 308,183 (40,296) $ — $ — $ 351,990 $ (46,360) $ 351,990 $ (46,360) December 31, 2023 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 $ — $ — $ 43,969 $ (5,902) $ 43,969 $ (5,902) Mortgage-backed securities and collateralized mortgage obligations — — 313,208 (38,075) 313,208 (38,075) $ — $ — $ 357,177 $ (43,977) $ 357,177 $ (43,977) The number of securities in an unrealized loss position at March 31, 2024 totaled 111, compared with 108 at December 31, 2023. All temporarily impaired securities were investment grade as of March 31, 2024 and December 31, 2023. For held to maturity securities, management measures expected credit losses on a collective basis by major security type. All of the mortgage-backed securities are issued by U.S. government agencies and are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major rating agencies and have a long history of no credit losses and, therefore, the expectation of non-payment is zero and the Company is not required to estimate an allowance for credit losses on these securities under the CECL standard. All these securities reflect a credit quality rating of AAA by Moody's Investors Service. The Company made an accounting policy election to exclude accrued interest receivable from the amortized cost basis of debt securities held to maturity. Accrued interest receivable on debt securities held to maturity is reported as a component of accrued interest receivable on the Consolidated Statement of Financial Condition, which totaled $941,000 and $997,000 at March 31, 2024 and December 31, 2023, respectively, and is excluded from the estimate of credit losses. 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, preferred stock in U.S. Government agencies, and a Community Reinvestment Act qualifying bond fund which are reported at fair value on the Company's Consolidated Statements of Financial Condition. The fair value of the equities portfolio at March 31, 2024 and December 31, 2023 was $4.4 million and $4.1 million, respectively. 8. Equity Securities at Fair Value (continued) The Company recorded a net increase in the fair value of equity securities of $351,000 and $168,000, during the three months ended March 31, 2024 and 2023, respectively, as a component of non-interest income.

Equity Securities at Fair Value

Equity Securities at Fair Value	3 Months Ended
	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Equity Securities at Fair Value	Debt Securities Available for Sale D ebt securities available for sale at March 31, 2024 and December 31, 2023 are summarized as follows: March 31, 2024 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value (In thousands) U.S. government and agency obligations $ 239,128 $ 225 $ (2,319) $ 237,034 Mortgage-backed securities and collateralized mortgage obligations 1,018,854 1 (149,638) 869,217 Municipal obligations 2,768 — (60) 2,708 Corporate debt securities 92,548 — (14,067) 78,481 $ 1,353,298 $ 226 $ (166,084) $ 1,187,440 December 31, 2023 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value (In thousands) U.S. government and agency obligations $ 146,387 $ 924 $ (1,810) $ 145,501 Mortgage-backed securities and collateralized mortgage obligations 1,009,508 20 (141,943) 867,585 Municipal obligations 2,770 — (68) 2,702 Corporate debt securities 92,565 2 (14,798) 77,769 $ 1,251,230 $ 946 $ (158,619) $ 1,093,557 6. Debt Securities Available for Sale (continued) The amortized cost and fair value of debt securities available for sale at March 31, 2024, 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. March 31, 2024 Amortized Cost Fair Value (In thousands) One year or less $ 65,637 $ 65,638 More than one year to five years 200,010 196,755 More than five years to ten years 68,797 55,830 $ 334,444 $ 318,223 Mortgage-backed securities and collateralized mortgage obligations 1,018,854 869,217 $ 1,353,298 $ 1,187,440 Mortgage-backed securities and collateralized mortgage obligations totaling $1.0 billion at amortized cost, and $869.2 million 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 March 31, 2024, proceeds from the sale of a debt security available for sale totaled $3.5 million, resulting in no gross gains and $1.3 million of gross losses. There were no calls and one matured debt security available for sale totaling $10.0 million, during the three months ended March 31, 2024. During the three months ended March 31, 2023, proceeds from the sale of debt securities available for sale totaled $42.6 million, resulting in no gross gains and $1.3 million of gross losses. There were no calls or matured debt securities available for sale during the three months ended March 31, 2023. Debt securities available for sale having a carrying value of $224.9 million and $211.5 million, at March 31, 2024 and December 31, 2023, respectively, were pledged as security for public funds on deposit at Columbia 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. Debt securities available for sale having a carrying value of $66.0 million and $75.1 million, at March 31, 2024 and December 31, 2023, respectively, were pledged by Freehold Bank for outstanding borrowings at the Federal Home Loan Bank, and 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 March 31, 2024 and December 31, 2023 and if the unrealized loss position was continuous for the twelve months prior to those respective dates: March 31, 2024 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 $ 102,990 $ (440) $ 25,704 $ (1,879) $ 128,694 $ (2,319) Mortgage-backed securities and collateralized mortgage obligations 28,787 (129) 840,015 (149,509) 868,802 (149,638) Municipal obligations — — 2,708 (60) 2,708 (60) Corporate debt securities — — 78,481 (14,067) 78,481 (14,067) $ 131,777 $ (569) $ 946,908 $ (165,515) $ 1,078,685 $ (166,084) 6. Debt Securities Available for Sale (continued) December 31, 2023 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 $ — $ — $ 21,344 $ (1,810) $ 21,344 $ (1,810) Mortgage-backed securities and collateralized mortgage obligations 54 (4) 863,026 (141,939) 863,080 (141,943) Municipal obligations — — 2,702 (68) 2,702 (68) Corporate debt securities — — 75,765 (14,798) 75,765 (14,798) $ 54 $ (4) $ 962,837 $ (158,615) $ 962,891 $ (158,619) The number of securities in an unrealized loss position at March 31, 2024 totaled 349, compared with 329 at December 31, 2023. All temporarily impaired securities were investment grade as of March 31, 2024 and December 31, 2023, except two corporate debt securities which were rated BB+, totaling approximately $8.1 million at both March 31, 2024 and December 31, 2023. For available for sale securities, the Company assesses whether a loss is from credit or other factors and considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency and adverse conditions related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows is less than the amortized cost, a credit loss would be recorded through an allowance for credit losses, limited by the amount that the fair value is less than the amortized cost basis. There was no activity in the allowance for credit losses on debt securities available for sale for the three months ended March 31, 2024 and 2023. The Company made an accounting policy election to exclude accrued interest receivable from the amortized cost basis of debt securities available for sale. Accrued interest receivable on debt securities available for sale is reported as a component of accrued interest receivable on the Consolidated Statement of Financial Condition, which totaled $4.8 million and $3.7 million at March 31, 2024 and December 31, 2023, respectively, and is excluded from the estimate of credit losses. Debt securities held to maturity at March 31, 2024 and December 31, 2023 are summarized as follows: March 31, 2024 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Allowance for Credit Losses Fair Value U.S. government and agency obligations $ 49,871 $ — $ (6,064) $ — $ 43,807 Mortgage-backed securities and collateralized mortgage obligations 348,480 — (40,296) — 308,184 $ 398,351 $ — $ (46,360) $ — $ 351,991 7. Debt Securities Held to Maturity (continued) December 31, 2023 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Allowance for Credit Losses Fair Value (In thousands) U.S. government and agency obligations $ 49,871 $ — $ (5,902) $ — $ 43,969 Mortgage-backed securities and collateralized mortgage obligations 351,283 — (38,075) — 313,208 $ 401,154 $ — $ (43,977) $ — $ 357,177 The amortized cost and fair value of debt securities held to maturity at March 31, 2024, 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. March 31, 2024 Amortized Cost Fair Value (In thousands) More than one year to five years $ 29,875 $ 27,610 More than five years to ten years 9,996 8,483 More than ten years 10,000 7,714 49,871 43,807 Mortgage-backed securities and collateralized mortgage obligations 348,480 308,184 $ 398,351 $ 351,991 Mortgage-backed securities and collateralized mortgage obligations totaling $348.5 million at amortized cost, and $308.2 million at fair value at March 31, 2024, 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 months ended March 31, 2024 and 2023 there were no sales, calls or maturities of debt securities held to maturity. Debt securities held to maturity having a carrying value of $213.0 million and $202.9 million, at March 31, 2024 and December 31, 2023, respectively, were pledged as security for public funds on deposit at Columbia Bank as required and permitted by law, pledged for outstanding borrowings at the Federal Home Loan Bank, and pledged for potential borrowings at the Federal Reserve Bank of New York. 7. Debt Securities Held to Maturity (continued) The following tables summarize the fair value and gross unrealized losses of those securities that reported an unrealized loss at March 31, 2024 and December 31, 2023 and if the unrealized loss position was continuous for the twelve months prior to those respective dates: March 31, 2024 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 $ — $ — $ 43,807 $ (6,064) $ 43,807 $ (6,064) Mortgage-backed securities and collateralized mortgage obligations — — 308,183 (40,296) 308,183 (40,296) $ — $ — $ 351,990 $ (46,360) $ 351,990 $ (46,360) December 31, 2023 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 $ — $ — $ 43,969 $ (5,902) $ 43,969 $ (5,902) Mortgage-backed securities and collateralized mortgage obligations — — 313,208 (38,075) 313,208 (38,075) $ — $ — $ 357,177 $ (43,977) $ 357,177 $ (43,977) The number of securities in an unrealized loss position at March 31, 2024 totaled 111, compared with 108 at December 31, 2023. All temporarily impaired securities were investment grade as of March 31, 2024 and December 31, 2023. For held to maturity securities, management measures expected credit losses on a collective basis by major security type. All of the mortgage-backed securities are issued by U.S. government agencies and are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major rating agencies and have a long history of no credit losses and, therefore, the expectation of non-payment is zero and the Company is not required to estimate an allowance for credit losses on these securities under the CECL standard. All these securities reflect a credit quality rating of AAA by Moody's Investors Service. The Company made an accounting policy election to exclude accrued interest receivable from the amortized cost basis of debt securities held to maturity. Accrued interest receivable on debt securities held to maturity is reported as a component of accrued interest receivable on the Consolidated Statement of Financial Condition, which totaled $941,000 and $997,000 at March 31, 2024 and December 31, 2023, respectively, and is excluded from the estimate of credit losses. 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, preferred stock in U.S. Government agencies, and a Community Reinvestment Act qualifying bond fund which are reported at fair value on the Company's Consolidated Statements of Financial Condition. The fair value of the equities portfolio at March 31, 2024 and December 31, 2023 was $4.4 million and $4.1 million, respectively. 8. Equity Securities at Fair Value (continued) The Company recorded a net increase in the fair value of equity securities of $351,000 and $168,000, during the three months ended March 31, 2024 and 2023, respectively, as a component of non-interest income.

Loans Receivable and Allowance

Loans Receivable and Allowance for Credit Losses	3 Months Ended
	Mar. 31, 2024
Receivables [Abstract]
Loans Receivable and Allowance for Credit Losses	Loans Receivable and Allowance for Credit Losses Loans receivable at March 31, 2024 and December 31, 2023 are summarized as follows: March 31, December 31, 2024 2023 (In thousands) Real estate loans: One-to-four family $ 2,778,932 $ 2,792,833 Multifamily 1,429,369 1,409,187 Commercial real estate 2,318,178 2,377,077 Construction 437,566 443,094 Commercial business loans 538,260 533,041 Consumer loans: Home equity loans and advances 260,786 266,632 Other consumer loans 2,601 2,801 Total gross loans 7,765,692 7,824,665 Purchased credit-deteriorated ("PCD") loans 14,945 15,089 Net deferred loan costs, fees and purchased premiums and discounts 34,992 34,783 Loans receivable $ 7,815,629 $ 7,874,537 The Company had no loans held-for-sale at March 31, 2024 and December 31, 2023. During the three months ended March 31, 2024, the Company sold $236,000, $2.1 million, and $1.3 million of one-to-four family real estate loans, Small Business Administration ("SBA") loans included in commercial business loans, and construction loans held-for-sale, respectively, resulting in gross gains of $185,000 and no gross losses. During the three months ended March 31, 2023, the Company sold $9.8 million, $15.4 million, $9.4 million, and $580,000, of one-to-four family real estate loans, home equity loans and advances, commercial real estate loans, SBA loans included in commercial business loans, and construction loans held-for-sale, respectively, resulting in gross gains of $799,000 and $8,000 of gross losses. During the three months ended March 31, 2024, no loans were purchased by the Company. During the three months ended March 31, 2023, the Company purchased a $14.7 million commercial real estate participation loan from a third party financial institution. At March 31, 2024 and December 31, 2023, commercial business loans included $717,000 and $809,000, respectively, in SBA Payroll Protection Program ("PPP") loans. At March 31, 2024 and December 31, 2023, the carrying value of loans serviced by the Company for investors was $544.0 million and $551.0 million, respectively. These loans are not included in the Consolidated Statements of Financial Condition. 9. Loans Receivable and Allowance for Credit Losses (continued) The following tables summarize the aging of loans receivable by portfolio segment, including non-accrual loans and excluding PCD loans at March 31, 2024 and December 31, 2023: March 31, 2024 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 $ 8,736 $ 3,293 $ 3,455 $ 15,484 $ 5,287 $ 2,763,448 $ 2,778,932 Multifamily 1,111 — — 1,111 — 1,428,258 1,429,369 Commercial real estate 5,762 — 1,942 7,704 8,456 2,310,474 2,318,178 Construction — — — — — 437,566 437,566 Commercial business loans 3,650 3,949 876 8,475 8,990 529,785 538,260 Consumer loans: Home equity loans and advances 682 — 187 869 202 259,917 260,786 Other consumer loans — — — — — 2,601 2,601 Total loans $ 19,941 $ 7,242 $ 6,460 $ 33,643 $ 22,935 $ 7,732,049 $ 7,765,692 December 31, 2023 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 $ 11,079 $ 4,254 $ 1,558 $ 16,891 $ 3,139 $ 2,775,942 $ 2,792,833 Multifamily — — — — — 1,409,187 1,409,187 Commercial real estate 1,711 2,472 2,740 6,923 2,740 2,370,154 2,377,077 Construction — — — — — 443,094 443,094 Commercial business loans 1,727 4,917 6,518 13,162 6,518 519,879 533,041 Consumer loans: Home equity loans and advances 779 14 170 963 221 265,669 266,632 Other consumer loans 1 — — 1 — 2,800 2,801 Total loans $ 15,297 $ 11,657 $ 10,986 $ 37,940 $ 12,618 $ 7,786,725 $ 7,824,665 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 March 31, 2024 and December 31, 2023, non-accrual loans totaled $22.9 million and $12.6 million, respectively. Included in non-accrual loans at March 31, 2024 and December 31, 2023, are 17 and 10 loans totaling $16.5 million and $1.6 million, respectively, which are less than 90 days in arrears. 9. Loans Receivable and Allowance for Credit Losses (continued) At March 31, 2024 and December 31, 2023, there were no loans past due 90 days or more still accruing interest. Purchased credit-deteriorated loans ("PCD") were loans acquired at a discount primarily due to deteriorated credit quality. These loans were initially recorded at fair value at acquisition, based upon the present value of expected future cash flows, with no related allowance for credit losses. Loans acquired in a business combination are recorded in accordance with ASC Topic 326, which requires loans as of the acquisition date, that have experienced a more than insignificant deterioration in credit quality since origination to be classified as PCD loans. At March 31, 2024 and December 31, 2023, PCD loans acquired in the Stewardship Financial Corporation ("Stewardship") acquisition totaled $1.6 million and $1.7 million, respectively, PCD loans acquired in the Freehold Bank acquisition totaled $2.8 million at both dates, and PCD loans acquired in the RSI Bank acquisition totaled $10.5 million and $10.6 million, respectively. We may obtain physical possession of real estate collateralizing a residential mortgage loan via foreclosure or through an in-substance repossession. At March 31, 2024 and December 31, 2023, the Company had no real estate owned. At March 31, 2024 we had five residential mortgage loans with a carrying value of $1.4 million and two home equity loan with a carrying value of $155,000, collateralized by residential real estate, which were in the process of foreclosure. At December 31, 2023, we had one residential mortgage loan and one home equity loan with carrying value of 576,000 and $93,000, respectively, collateralized by residential real estate which were in the process of foreclosure. The Company has an accounting policy election to exclude accrued interest receivable from the amortized cost basis of loans receivable. Accrued interest receivable on loans receivable is reported as a component of accrued interest receivable in the Consolidated Statement of Financial Condition, which totaled $33.7 million and $32.9 million at March 31, 2024 and December 31, 2023, respectively, and is excluded from the estimate of credit losses. The determination of the allowance for credit losses (“ACL”) on loans is considered a critical accounting estimate by management because of the high degree of judgment involved in determining qualitative loss factors, the subjectivity of the assumptions used, and the potential for changes in the forecasted economic environment The ACL is maintained at a level management considers adequate to provide for estimated losses and impairment based upon an evaluation of known and inherent risk in the loan portfolio. The ACL consists of two elements: (1) identification of loans that must be individually analyzed for impairment and (2) establishment of an ACL for loans collectively analyzed. Management estimates the ACL using relevant and reliable information from internal and external sources, related to past events, current conditions, and a reasonable and supportable forecast. Historical credit loss experience for both the Company and its segment-specific peers provides the basis for the estimate of expected credit losses. Credit losses over a defined period are converted to PD rate curves through the use of segment-specific LGD risk factors that convert default rates to loss severity based on industry-level, observed relationships between the two variables for each segment, primarily due to the nature of the underlying collateral. These risk factors were assessed for reasonableness against the Company’s own loss experience and adjusted in certain cases when the relationship between the Company’s historical default and loss severity deviate from that of the wider industry. The historical PD curves, together with corresponding economic conditions, establish a quantitative relationship between economic conditions and loan performance through an economic cycle. Portfolio segments are defined as the level at which an entity develops and documents a systematic methodology to determine its allowance for credit losses. Management developed segments for estimating losses based on the type of borrower and collateral which is generally based upon federal call report segmentation. The segments have been combined or sub-segments have been added as needed to ensure loans of similar risk profiles are appropriately pooled. We maintain a loan review system that provides a periodic review of the loan portfolio and the identification of individually analyzed loans. The ACL for individually analyzed loans is based on the fair value of collateral or cash flows. While management uses the best information available to make such evaluations, future adjustments to the allowance may be necessary if economic conditions differ substantially from the assumptions used in making the evaluations. 9. Loans Receivable and Allowance for Credit Losses (continued) The ACL quantitative allowance for each segment is measured using a discounted cash flow methodology incorporating an econometric, probability of default (“PD”) and loss given default (“LGD”) with distinct segment-specific multi-variate regression models applied. Expected credit losses are estimated over the life of the loans by measuring the difference between the net present value of modeled cash flows and amortized cost basis. Contractual cash flows over the contractual life of the loans are the basis for the modeled cash flows, adjusted for model defaults and expected prepayments and discounted at the loan-level effective interest rate. The contractual term excludes expected extensions, renewals, and modifications. Management estimates the ACL using relevant and reliable information from internal and external sources, related to past events, current conditions, and a reasonable and supportable forecast. Historical credit loss experience for both the Company and its segment-specific peers provides the basis for the estimate of expected credit losses. Credit losses over a defined period are converted to PD rate curves through the use of segment-specific LGD risk factors that convert default rates to loss severity based on industry-level, observed relationships between the two variables for each segment, primarily due to the nature of the underlying collateral. These risk factors were assessed for reasonableness against the Company’s own loss experience and adjusted in certain cases when the relationship between the Company’s historical default and loss severity deviate from that of the wider industry. The historical PD curves, together with corresponding economic conditions, establish a quantitative relationship between economic conditions and loan performance through an economic cycle. Using the historical relationship between economic conditions and loan performance, management’s expectation of future loan performance is incorporated using a single economic forecast of macroeconomic variables (i.e., unemployment, gross domestic product, vacancy, and home price index). This forecast is applied over a period that management has determined to be reasonable and supportable. Beyond the period over which management can develop or source a reasonable and supportable forecast, the model reverts to long-term average historical loss rates using a straight-line, time-based methodology. The Company's current forecast period is six quarters, with a four-quarter reversion period to long-term average historical loss rates. After quantitative considerations, management applies additional qualitative adjustments that consider the expected impact of certain factors not fully captured in the quantitative reserve. Qualitative adjustments include but are not limited to concentrations of large loan balances, delinquency trends, change in collateral values within segments, and other considerations. The ACL is established through the provision for credit losses that are charged to income, which is based upon an evaluation of estimated losses in the current loan portfolio, including the evaluation of individually analyzed loans. Charge-offs against the ACL are taken on loans where management determines that the collection of loan principal and interest is unlikely. Recoveries made on loans that have been charged-off are credited to the ACL. Although we believe we have established and maintained the ACL on loans at appropriate levels, changes in reserves may be necessary if actual economic and other conditions differ substantially from the forecast used in estimating the ACL. Our financial results are affected by the changes in and the level of the ACL. This process involves our analysis of internal and external variables, and it requires that we exercise judgment to estimate an appropriate ACL. As a result of the uncertainty associated with this subjectivity, we cannot assure the precision of the amount reserved, should we experience sizable loan losses in any particular period and/or significant changes in assumptions or economic condition. We believe the primary risks inherent in the portfolio are a general decline in the economy, a decline in real estate market values, rising unemployment, increasing vacancy rates, and increases in interest rates in the absence of economic improvement or any other such factors. Any one or a combination of these events may adversely affect a borrower's ability to repay its loan, resulting in increased delinquencies and loan losses. Accordingly, we have recorded loan credit losses at a level which is estimated to represent the current risk in its loan portfolio. Most of our non-performing assets are collateral dependent loans which are written down to the fair value of the collateral less estimated costs to sell. We continue to assess the collateral of these loans and update our appraisals on these loans on an annual basis. To the extent the property values decline, there could be additional losses on these non-performing assets, which may be material. Management considered these market conditions in deriving the estimated ACL. Should economic difficulties occur, the ultimate amount of loss could vary from our current estimate. 9. Loans Receivable and Allowance for Credit Losses (continued) The following tables summarize loans receivable (including PCD loans) and allowance for credit losses by portfolio segment and impairment method at March 31, 2024 and December 31, 2023: March 31, 2024 One-to-Four Family Multifamily Commercial Real Estate Construction Commercial Business Home Equity Loans and Advances Other Consumer Loans Total (In thousands) Allowance for credit losses: Individually analyzed loans $ 35 $ — $ 226 $ — $ 98 $ — $ — $ 359 Collectively analyzed loans 13,800 8,670 14,947 8,068 7,611 1,872 7 54,975 Loans acquired with deteriorated credit quality 5 — 59 — 2 1 — 67 Total $ 13,840 $ 8,670 $ 15,232 $ 8,068 $ 7,711 $ 1,873 $ 7 $ 55,401 Total loans: Individually analyzed loans $ 1,728 $ 46 $ 9,695 $ — $ 9,115 $ 110 $ — $ 20,694 Collectively analyzed loans 2,777,204 1,429,323 2,308,483 437,566 529,145 260,676 2,601 7,744,998 Loans acquired with deteriorated credit quality 1,873 — 12,591 — 344 137 — 14,945 Total loans $ 2,780,805 $ 1,429,369 $ 2,330,769 $ 437,566 $ 538,604 $ 260,923 $ 2,601 $ 7,780,637 9. Loans Receivable and Allowance for Credit Losses (continued) December 31, 2023 One-to-Four Family Multifamily Commercial Real Estate Construction Commercial Business Home Equity Loans and Advances Other Consumer Loans Total (In thousands) Allowance for credit losses: Individually analyzed loans $ 186 $ 7 $ 237 $ — $ 154 $ 30 $ — $ 614 Collectively analyzed loans 12,827 8,735 15,378 7,758 7,742 1,862 7 54,309 Loans acquired with deteriorated credit quality 4 — 142 — 27 — — 173 Total $ 13,017 $ 8,742 $ 15,757 $ 7,758 $ 7,923 $ 1,892 $ 7 $ 55,096 Total loans: Individually analyzed loans $ 4,063 $ 382 $ 15,360 $ — $ 11,550 $ 601 $ — $ 31,956 Collectively analyzed loans 2,788,770 1,408,805 2,361,717 443,094 521,491 266,031 2,801 7,792,709 Loans acquired with deteriorated credit quality 1,893 — 12,689 — 369 138 — 15,089 Total loans $ 2,794,726 $ 1,409,187 $ 2,389,766 $ 443,094 $ 533,410 $ 266,770 $ 2,801 $ 7,839,754 On January 1, 2023, the Company adopted ASU 2022-02, Financial Instruments-Credit Losses (Topic 326) , Troubled Debt Restructurings and Vintage Disclosures , which eliminated the accounting guidance for troubled debt restructurings (“TDRs”) while enhancing disclosure requirements for certain loan refinancing and restructurings by creditors when a borrower is experiencing financial difficulty. This guidance was applied on a prospective basis. Modifications made to borrowers experiencing financial difficulty may include principal or interest forgiveness, forbearance, interest rate reductions, term extensions, or a combination of these events intended to minimize economic loss and to avoid foreclosure or repossession of collateral. 9. Loans Receivable and Allowance for Credit Losses (continued) The following table presents the modifications of loans to borrowers experiencing financial difficulty that were modified during the three months ended March 31, 2024: For the Three Months Ended March 31, 2024 Amortized Cost Term Extension Combination of Term Extension, Interest Rate Reduction, and Principal Forgiveness % of Total Class of Loans Receivable (In thousands) Commercial business $ 3,700 $ 3,700 $ — 0.69 % Total loans $ 3,700 $ 3,700 $ — 0.05 % For the three months ended March 31, 2023, the Company had no modifications in accordance with the ASU. The following table describes the types of modifications of loans to borrowers experiencing financial difficulty during the three months ended March 31, 2024: For the Three Months Ended March 31, 2024 Type of Modifications Commercial business 15 month term extension The Company closely monitors the performance of modifications of loans to borrowers experiencing financial difficulty to understand the effectiveness of these modification efforts. The Company did not extend any commitments to lend additional funds to borrowers experiencing financial difficulty whose loans had been modified during for the three months ended March 31, 2024. The following tables presents the aging analysis of modifications of loans to borrowers experiencing financial difficulty at March 31, 2024 and December 31, 2023: March 31, 2024 Current 30-59 Days 60-89 Days 90 Days or More Non-accrual Total (In thousands) Commercial real estate $ 1,031 $ — $ — $ — $ — $ 1,031 Commercial business — — — — 5,656 5,656 Total loans $ 1,031 $ — $ — $ — $ 5,656 $ 6,687 9. Loans Receivable and Allowance for Credit Losses (continued) December 31, 2023 Current 30-59 Days 60-89 Days 90 Days or More Non-accrual Total (In thousands) Commercial real estate $ 1,035 $ — $ — $ — $ — $ 1,035 Construction 2,317 — — — — 2,317 Commercial business — — 4,917 — 237 5,154 Total loans $ 3,352 $ — $ 4,917 $ — $ 237 $ 8,506 The activity in the allowance for credit losses by portfolio segment for the three months ended March 31, 2024 and 2023 are as follows: For the Three Months Ended March 31, One-to-Four Family Multifamily Commercial Real Estate Construction Commercial Business Home Equity Loans and Advances Other Consumer Loans Totals (In thousands) 2024 Balance at beginning of period $ 13,017 $ 8,742 $ 15,757 $ 7,758 $ 7,923 $ 1,892 $ 7 $ 55,096 Provision for (reversal of) credit losses 825 (72) (525) 309 4,665 (24) 100 5,278 Recoveries — — — 1 143 5 — 149 Charge-offs (2) — — — (5,020) — (100) (5,122) Balance at end of period $ 13,840 $ 8,670 $ 15,232 $ 8,068 $ 7,711 $ 1,873 $ 7 $ 55,401 2023 Balance at beginning of period $ 11,802 $ 7,877 $ 18,111 $ 6,425 $ 6,897 $ 1,681 $ 10 $ 52,803 Provision for (reversal of) credit losses 1,121 268 (1,768) 314 272 (61) 29 175 Recoveries — — — — 151 20 5 176 Charge-offs (134) — (86) — — (26) (35) (281) Balance at end of period $ 12,789 $ 8,145 $ 16,257 $ 6,739 $ 7,320 $ 1,614 $ 9 $ 52,873 9. Loans Receivable and Allowance for Credit Losses (continued) The following tables present loans individually analyzed loans by segment, excluding PCD loans, at March 31, 2024 and December 31, 2023: At March 31, 2024 Recorded Investment Unpaid Principal Balance Specific Allowance (In thousands) With no allowance recorded: Real estate loans: One-to-four family $ 1,139 $ 1,423 $ — Multifamily 46 50 — Commercial real estate 1,942 2,908 — Commercial business loans 4,865 4,865 — Consumer loans: Home equity loans and advances 110 128 — 8,102 9,374 — With a specific allowance recorded: Real estate loans: One-to-four family 589 589 35 Commercial real estate 7,753 8,412 226 Commercial business loans 4,250 4,249 98 12,592 13,250 359 Total: Real estate loans: One-to-four family 1,728 2,012 35 Multifamily 46 50 — Commercial real estate 9,695 11,320 226 Commercial business loans 9,115 9,114 98 Consumer loans: Home equity loans and advances 110 128 — Total loans $ 20,694 $ 22,624 $ 359 9. Loans Receivable and Allowance for Credit Losses (continued) At December 31, 2023 Recorded Investment Unpaid Principal Balance Specific Allowance (In thousands) With no allowance recorded: Real estate loans: One-to-four family $ 1,170 $ 1,519 $ — Multifamily 49 52 — Commercial real estate 12,741 14,364 — Commercial business loans 5,814 6,764 — Consumer loans: Home equity loans and advances 145 163 — 19,919 22,862 — With a specific allowance recorded: Real estate loans: One-to-four family 2,893 2,911 186 Multifamily 333 333 7 Commercial real estate 2,619 2,622 237 Commercial business loans 5,736 5,736 154 Consumer loans: Home equity loans and advances 456 456 30 12,037 12,058 614 Total: Real estate loans: One-to-four family 4,063 4,430 186 Multifamily 382 385 7 Commercial real estate 15,360 16,986 237 Commercial business loans 11,550 12,500 154 Consumer loans: Home equity loans and advances 601 619 30 $ 31,956 $ 34,920 $ 614 Specific allocations of the allowance for credit losses attributable to individually analyzed loans totaled $359,000 and $614,000 at March 31, 2024 and December 31, 2023, respectively. At March 31, 2024 and December 31, 2023, impaired loans for which there was no related allowance for credit losses totaled $8.1 million and $19.9 million, respectively. 9. Loans Receivable and Allowance for Credit Losses (continued) The following table presents interest income recognized for individually analyzed loans by loan segment, excluding PCD loans and non-accrual loans, for the three months ended March 31, 2024 and 2023: For the Three Months Ended March 31, 2024 2023 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (In thousands) Real estate loans: One-to-four family $ 2,896 $ 13 $ 4,459 $ 45 Multifamily 214 1 448 5 Commercial real estate 12,528 20 16,252 151 Commercial business loans 10,333 — 1,904 49 Consumer loans: Home equity loans and advances 356 1 688 7 Total loans $ 26,327 $ 35 $ 23,751 $ 257 Management prepares an analysis each quarter that categorizes the entire loan portfolio by certain risk characteristics such as loan type (residential mortgage, commercial mortgage, construction, commercial business, etc.) and loan risk rating. The categorization of loans into risk categories is based upon relevant information about the borrower's ability to service their debt. 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 Credit Losses (continued) The following table summarizes the Company's loans by year of origination and internally assigned credit risk rating, excluding PCD loans, at March 31, 2024 and December 31, 2023: Loans by Year of Origination at March 31, 2024 2024 2023 2022 2021 2020 Prior Revolving Loans Revolving Loans to Term Loans Total (In thousands) One-to-Four Family Pass $ 22,636 $ 157,523 $ 785,252 $ 783,100 $ 267,209 $ 757,084 $ — $ — $ 2,772,804 Special mention — — — — — — — — — Substandard — 751 1,398 1,064 291 2,624 — — 6,128 Total One-to-Four Family 22,636 158,274 786,650 784,164 267,500 759,708 — — 2,778,932 Gross charge-offs — — — — — 2 — — 2 Multifamily Pass — 117,242 320,866 365,098 169,203 452,444 — — 1,424,853 Special mention — — — — — 4,516 — — 4,516 Substandard — — — — — — — — — Total Multifamily — 117,242 320,866 365,098 169,203 456,960 — — 1,429,369 Gross charge-offs — — — — — — — — — Commercial Real Estate Pass 13,969 182,962 431,612 362,730 164,245 1,105,621 — — 2,261,139 Special mention — — — 463 — 22,285 — — 22,748 Substandard — — 5,743 — 1,793 26,755 — — 34,291 Total Commercial Real Estate 13,969 182,962 437,355 363,193 166,038 1,154,661 — — 2,318,178 Gross charge-offs — — — — — — — — — Construction Pass 6,343 119,856 251,745 59,622 — — — — 437,566 Special mention — — — — — — — — — Substandard — — — — — — — — — Total Construction 6,343 119,856 251,745 59,622 — — — — 437,566 Gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — 9. Loans Receivable and Allowance for Credit Losses (continued) Loans by Year of Origination at March 31, 2024 2024 2023 2022 2021 2020 Prior Revolving Loans Revolving Loans to Term Loans Total (In thousands) Commercial Business Pass $ 16,089 $ 59,522 $ 56,408 $ 27,402 $ 25,746 $ 50,048 $ 274,391 $ — $ 509,606 Special mention — — — — 66 931 1,878 — 2,875 Substandard — 392 452 83 56 7,914 16,484 — 25,381 Doubtful — — — — — 398 — — 398 Total Commercial Business 16,089 59,914 56,860 27,485 25,868 59,291 292,753 — 538,260 Gross charge-offs — — — 2,352 — 2,668 — — 5,020 Home Equity Loans and Advances Pass 3,939 19,264 20,289 17,744 10,997 89,436 32,577 66,338 260,584 Special mention — — — — — — — — — Substandard — — — — — 202 — — 202 Total Home Equity Loans and Advances 3,939 19,264 20,289 17,744 10,997 89,638 32,577 66,338 260,786 Gross charge-offs — — — — — — — — — Other Consumer Loans Pass 1,932 133 134 18 3 74 307 — 2,601 Special mention — — — — — — — — — Substandard — — — — — — — — — Total Other Consumer Loans 1,932 133 134 18 3 74 307 — 2,601 Gross charge-offs — 24 52 22 — 2 — — 100 Total Loans 64,908 657,645 1,873,899 1,617,324 639,609 2,520,332 325,637 66,338 7,765,692 Total gross charge-offs $ — $ 24 $ 52 $ 2,374 $ — $ 2,672 $ — $ — $ 5,122 9. Loans Receivable and Allowance for Credit Losses (continued) Loans by Year of Origination at December 31, 2023 2023 2022 2021 2020 2019 Prior Revolving Loans Revolving Loans to Term Loans Total (In thousands) One-to-Four Family Pass $ 156,279 $ 786,735 $ 793,074 $ 272,215 $ 165,337 $ 614,351 $ — $ — $ 2,787,991 Special mention — — — — — — — — — Substandard — 1,176 769 283 629 1,985 — — 4,842 Total One-to-Four family 156,279 787,911 793,843 272,498 165,966 616,336 — — 2,792,833 Gross charge-offs — 208 197 — 29 151 — — 585 Multifamily Pass 111,612 317,277 359,983 157,294 202,923 255,578 — — 1,404,667 Special mention — — — — — 4,520 — — 4,520 Substandard — — — — — — — — — Total Multifamily 111,612 317,277 359,983 157,294 202,923 260,098 — — 1,409,187 Gross charge-offs — — — — — — — — — Commercial Real Estate Pass 191,030 422,058 371,578 174,705 236,263 930,740 — — 2,326,374 Special mention — — 465 — 871 24,405 — — 25,741 Substandard — 5,743 905 1,799 — 16,515 — — 24,962 Total Commercial Real Estate 191,030 427,801 372,948 176,504 237,134 971,660 — — 2,377,077 Gross charge-offs — — — — 64 86 — — 150 Construction Pass 99,634 270,397 65,374 4,933 439 2,317 — — 443,094 Special mention — — — — — — — — — Substandard — — — — — — — — — Total Construction 99,634 270,397 65,374 4,933 439 2,317 — — 443,094 Gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — 9. Loans Receivable and Allowance for Credit Losses (continued) Loans by Year of Origination at December 31, 2023 2023 2022 2021 2020 2019 Prior Revolving Loans Revolving Loans to Term Loans Total (In thousands) Commercial Business Pass $ 67,529 $ 58,118 $ 28,989 $ 27,194 $ 15,499 $ 38,954 $ 272,698 $ — $ 508,981 Special mention 127 303 — 97 14 1,389 4,587 — 6,517 Substandard — 76 88 6 1,081 6,150 10,142 — 17,543 Total Commercial Business 67,656 58,497 29,077 27,297 16,594 46,493 287,427 — 533,041 Gross charge-offs — — 31 34 2,249 304 — — 2,618 Home Equity Loans and Advances Pass 20,198 20,713 18,139 11,368 9,877 84,261 37,261 64,558 266,375 Special mention — — — — — — — — — Substandard — — — — — 257 — — 257 Total Home Equity Loans and Advances 20,198 20,713 18,139 11,368 9,877 84,518 37,261 64,558 266,632 Gross charge-offs — — — — — 26 — — 26 Other Consumer Loans Pass 2,199 151 38 6 18 68 321 — 2,801 Special mention — — — — — — — — — Substandard — — — — — — — — — Total Other Consumer Loans 2,199 151 38 6 18 68 321 — 2,801 Gross charge-offs — 61 52 — — 2 — — 115 Total Loans 648,608 1,882,747 1,639,402 649,900 632,951 1,981,490 325,009 64,558 7,824,665 Total gross charge-offs $ — $ 269 $ 280 $ 34 $ 2,342 $ 569 $ — $ — $ 3,494 9. Loans Receivable and Allowance for Credit Losses (continued) The Company is required to include unfunded commitments that are expected to be funded in the future within the allowance calculation, other than those that are unconditionally cancellable. To arrive at that reserve, the reserve percentage for each applicable segment is applied to the unused portion of the expected commitment balance and is multiplied by the expected funding rate. To determine the expected funding rate, the Company uses a historical utilization rate for each segment. The allowance for credit losses for off-balance-sheet exposures is reported in other liabilities in the Consolidated Statements of Financial Condition. The liability represents an estimate of expected credit losses arising from off-balance-sheet exposures such as unfunded commitments. At March 31, 2024 and December 31, 2023, the balance of the allowance for credit losses on unfunded commitments, included in other liabilities, totaled $4.7 million and $5.5 million, respectively. The Company recorded a reversal of provision for credit losses on unfunded commitments, included in other non-interest expense in the Consolidated Statements of Income, of $830,000 and $528,000 during the three months ended March 31, 2024 and 2023, respectively. The following table presents the activity in the allowance for credit losses on off-balance-sheet exposures for the three months ended March 31, 2024 and 2023: March 31, 2024 2023 (In thousands) Allowance for Credit Losses: Beginning balance $ 5,484 $ 6,970 (Reversal of) provision for credit losses (830) (528) Balance at end of period $ 4,654 $ 6,442

Leases

Leases	3 Months Ended
	Mar. 31, 2024
Leases [Abstract]
Leases	Leases The Company leases real estate property for branches and office space. At March 31, 2024 and December 31, 2023, 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. 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. At March 31, 2024 and December 31, 2023, the weighted average remaining lease term for operating leases was 5.8 years and 5.9 years, respectively, and the weighted average discount rate used in the measurement of operating lease liabilities was 2.94% and 2.70%, respectively. The Company accounts 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 March 31, 2024 and 2023, operating and variable lease expenses totaled approximately $704,000 and $633,000, respectively. There were no sale and leaseback transactions, leveraged leases or lease transactions with related parties during the three months ended March 31, 2024 and 2023. At March 31, 2024, the Company had entered into a lease related to an additional branch office location which had not yet commenced. 10. Leases (continued) The following table summarizes lease payment obligations for each of the next five years and thereafter as follows: Lease Payment Obligations at March 31, December 31, 2024 2023 (In thousands) One year or less $ 3,314 $ 4,204 After one year to two years 4,037 3,536 After two years to three years 3,576 3,154 After three years to four years 2,694 2,271 After four years to five years 2,227 1,807 Thereafter 3,212 2,974 Total undiscounted cash flows 19,060 17,946 Discount on cash flows (1,574) (1,411) Total lease liability $ 17,486 $ 16,535

Deposits

Deposits	3 Months Ended
	Mar. 31, 2024
Deposits [Abstract]
Deposits	Deposits Deposits at March 31, 2024 and December 31, 2023 are summarized as follows: March 31, December 31, 2024 2023 (In thousands) Non-interest-bearing demand $ 1,415,909 $ 1,437,361 Interest-bearing demand 1,929,490 1,966,463 Money market accounts 1,228,098 1,255,528 Savings and club deposits 687,303 700,348 Certificates of deposit 2,568,603 2,486,856 Total deposits $ 7,829,403 $ 7,846,556 The aggregate amount of certificates of deposit that meet or exceed $100,000 totaled approximately $1.5 billion at both March 31, 2024 and December 31, 2023. Interest expense on deposits for the three months ended March 31, 2024 and 2023 totaled $48.4 million and $17.1 million, respectively. 11. Deposits (continued) Scheduled maturities of certificates of deposit accounts at March 31, 2024 and December 31, 2023 are summarized as follows: March 31, December 31, 2024 2023 (In thousands) One year or less $ 2,202,994 $ 2,077,863 After one year to two years 287,263 321,271 After two years to three years 50,734 57,836 After three years to four years 11,905 13,427 After four years 15,707 16,459 $ 2,568,603 $ 2,486,856

Stock Based Compensation

Stock Based Compensation	3 Months Ended
	Mar. 31, 2024
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 March 7, 2024, 27,162 shares of restricted stock were awarded, with a grant date fair value of 16.57 per share. To fund the grant of restricted common stock, the Company issued shares from authorized but unissued shares. On March 6, 2024, 185,279 shares of restricted stock were awarded, with a grant date fair value of 16.49 per share. To fund the grant of restricted common stock, the Company issued shares from authorized but unissued shares. On May 1, 2023, 201,887 shares of restricted stock were awarded, with a grant date fair value of $15.94 per share. To fund the grant of restricted common stock, the Company issued shares from authorized unissued shares. On June 20, 2023, 24,687 shares of restricted stock were awarded, with a grant date fair value of $18.23 per share. To fund the grant of restricted common stock, the Company issued shares from authorized unissued shares. At March 31, 2024, there were 367,567 shares remaining available for future restricted stock awards and 1,427,137 shares remaining available for future stock option grants under the 2019 Plan. 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 awards, which vest upon the satisfactory attainment of certain corporate financial targets. Management recognizes compensation expense for the fair value of restricted shares on a straight-line basis over the requisite performance or service period. During the three months ended March 31, 2024 and 2023, approximately $1.3 million and $1.0 million, respectively, in expense was recognized in regard to these awards. The expected future compensation expense related to the 620,547 non-vested restricted shares outstanding at March 31, 2024 is approximately $7.4 million over a weighted average period of 1.8 years. 12. Stock Based Compensation (continued) The following is a summary of the Company's restricted stock activity during the three months ended March 31, 2024 and 2023: Number of Restricted Shares Weighted Average Grant Date Fair Value Non-vested at January 1, 2024 435,541 $ 16.77 Grants 212,441 16.50 Vested (25,890) 20.14 Forfeited (1,545) 16.54 Non-vested at March 31, 2024 620,547 $ 16.54 Number of Restricted Shares Weighted Average Grant Date Fair Value Non-vested at January 1, 2023 430,954 $ 17.31 Vested (26,424) 21.16 Forfeited (1,929) 21.12 Non-vested at March 31, 2023 402,601 $ 17.10 On March 6, 2024, options to purchase 286,265 shares of Company common stock were awarded with a grant date fair value of $6.13 per option. Stock options granted under the 2019 Plan generally vest in equal installments over the service period of 3 years beginning 1 year from the date of grant. These stock options were granted at an exercise price of $16.49, 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 years, risk-free rate of return of 4.12%, volatility of 29.13%, and a dividend yield of 0.00%. On May 1, 2023, options to purchase 286,016 shares of Company common stock were awarded with a grant date fair value of $5.48 per option. Stock options granted under the 2019 Plan generally vest in equal installments over the service period of 3 years beginning 1 year from the date of grant. These stock options were granted at an exercise price of $15.94, 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 years, risk-free rate of return of 3.60%, volatility of 27.07%, 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. The expected volatility is based on the historical daily stock prices of the Company stock. 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 March 31, 2024 and 2023, approximately $951,000 and $921,000 in expense was recognized in regard to these awards. The expected future compensation expense related to the 1,265,884 non-vested options outstanding at March 31, 2024 is $4.3 million over a weighted average period of 2.0 years. 12. Stock Based Compensation (continued) The following is a summary of the Company's option activity during the three months ended March 31, 2024 and 2023: Number of Stock Options Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value Outstanding, January 1, 2024 3,584,069 $ 16.20 6.1 $ 11,602,267 Granted 286,265 16.49 — — Exercised (28,051) 15.60 — — Expired (1,412) 15.60 — — Forfeited (5,832) 17.29 — — Outstanding, March 31, 2024 3,835,039 $ 16.22 6.2 $ 5,050,150 Options exercisable at March 31, 2024 2,569,155 $ 16.12 5.6 $ 3,590,728 Number of Stock Options Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value Outstanding, January 1, 2023 3,436,869 $ 16.26 6.9 $ 18,435,239 Exercised (3,618) 15.60 — — Expired (2,117) 15.60 — — Forfeited (8,055) 20.03 — — Outstanding, March 31, 2023 3,423,079 $ 16.25 6.7 $ 7,893,117 Options exercisable at March 31, 2023 1,880,693 $ 15.85 6.4 $ 4,711,769 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 months ended March 31, 2024 and 2023, the aggregate intrinsic value of options exercised was approximately $106,000 and 19,300, respectively.

Components of Net Periodic Bene

Components of Net Periodic Benefit Cost	3 Months Ended
	Mar. 31, 2024
Retirement Benefits [Abstract]
Components of Periodic Benefit Cost	Components of Net Periodic Benefit Cost Pension Plan, Retirement Income Maintenance Plan (the "RIM Plan") Post-retirement Plan, and Split-Dollar Life Insurance Plans The Company maintains a single employer, tax-qualified defined benefit pension plan (the "Pension Plan") which covers full-time employees that satisfy the Pension Plan's eligibility requirements. The benefits are based on years of service and the employee's average compensation for the highest five The Company also maintains 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 Sections 415 and 401(a)(17). 13. Components of Net Periodic Benefit Cost (continued) 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 employee's 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. The Company recognizes a liability for future benefits applicable to endorsement split-dollar life insurance arrangements that provide death benefits post-retirement. Through its mergers, the Company recognized additional liability for future benefits applicable to endorsement split-dollar life insurance arrangements that provide death benefits post-retirement under those respective Bank's program. Net periodic (income) benefit cost for the Pension Plan, RIM Plan, Post-retirement Plan and Split-Dollar Life Insurance plan benefits for the three months ended March 31, 2024 and 2023, includes the following components: For the Three Months Ended March 31, Pension Plan (1) RIM Plan Post-retirement Plan Split-Dollar Life Insurance 2024 2023 2024 2023 2024 2023 2024 2023 Affected Line Item in the Consolidated Statements of Income (In thousands) Service cost $ 1,212 $ 1,199 $ 61 $ 69 $ 54 $ 54 $ 57 $ 69 Compensation and employee benefits Interest cost 3,100 2,790 162 158 248 242 208 204 Other non-interest expense Expected return on plan assets (8,119) (7,479) — — — — — — Other non-interest expense Amortization: Prior service cost — — — — — — 14 14 Other non-interest expense Net loss 512 — 28 14 — — — — Other non-interest expense Net periodic (income) benefit cost $ (3,295) $ (3,490) $ 251 $ 241 $ 302 $ 296 $ 279 $ 287 (1) Effective September 30, 2023, the RSI Pension Plan was merged into the Columbia Bank Pension Plan. Through the acquisition of RSI Bank on May 1, 2022, the Company acquired a funded pension plan and a non-funded post-retirement plan. The benefits are based on years of service and the employee’s compensation, as defined. The Pension Plan was amended effective March 31, 2011, to freeze the Plan so that no employee shall commence or recommence participation in the Plan, that there shall be no further benefit accruals under the Plan, and that compensation received after the effective date shall not be recognized for any purpose under the Plan. Effective September 30, 2023, the RSI Pension Plan was merged, and all assets were transferred into the Columbia Bank Pension Plan. The defined benefit post-retirement healthcare plan covers substantially all retirees and employees. 13. Components of Net Periodic Benefit Cost (continued) Net periodic (income) benefit cost for the Pension Plan and Post-retirement Plan for the three months ended March 31, 2024 and 2023, includes the following components: For the Three Months Ended March 31, Pension Plan (1) Post-retirement Plan Affected Line Item in the Consolidated Statements of Income 2024 2023 2024 2023 (In thousands) Service cost $ — $ — $ 13 $ 17 Compensation and employee benefits Interest cost — 76 31 27 Other non-interest expense Expected return on plan assets — (122) — — Other non-interest expense Amortization: Net (gain) — — (5) (15) Other non-interest expense Net periodic (income) benefit cost $ — $ (46) $ 39 $ 29 (1) Effective September 30, 2023, the RSI Pension Plan was merged into the Columbia Bank Pension Plan. For the three months ended March 31, 2024 and 2023, no contributions were made to either Pension Plan. The net periodic (income) cost for pension benefits, other post-retirement and split-dollar life insurance benefits for the three months ended March 31, 2024, was calculated using the most recent available benefit valuations.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2024
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. 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. 14. Fair Value Measurements (continued) 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 March 31, 2024 and December 31, 2023. 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, matrix pricing and discounted cash flow 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. Discounted cash flows, a Level 3 input, is estimated by discounting the expected future cash flows using the current rates for securities with similar credit ratings and similar remaining maturities. 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. The Company classifies the estimated fair value of its loan portfolio as Level 3. 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. The following tables present the assets and liabilities reported on the Consolidated Statements of Financial Condition at their fair values at March 31, 2024 and December 31, 2023, by level within the fair value hierarchy: 14. Fair Value Measurements (continued) March 31, 2024 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 $ 237,034 $ 229,844 $ 7,190 $ — Mortgage-backed securities and collateralized mortgage obligations 869,217 — 869,217 — Municipal obligations 2,708 — 889 1,819 Corporate debt securities 78,481 — 70,389 8,092 Total debt securities available for sale 1,187,440 229,844 947,685 9,911 Equity securities 4,430 4,107 323 — Derivative assets 25,346 — 25,346 — $ 1,217,216 $ 233,951 $ 973,354 $ 9,911 Derivative liabilities $ 18,142 $ — $ 18,142 $ — December 31, 2023 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 $ 145,501 $ 137,800 $ 7,701 $ — Mortgage-backed securities and collateralized mortgage obligations 867,585 — 867,585 — Municipal obligations 2,702 — 892 1,810 Corporate debt securities 77,769 — 69,842 7,927 Total debt securities available for sale 1,093,557 137,800 946,020 9,737 Equity securities 4,079 3,758 321 Derivative assets 18,898 — 18,898 — $ 1,116,534 $ 141,558 $ 965,239 $ 9,737 Derivative liabilities $ 25,025 $ — $ 25,025 $ — 14. Fair Value Measurements (continued) The table below provides activity of assets reported as Level 3 during the three months ended March 31, 2024 and 2023: Significant Unobservable Inputs (Level 3) (In thousands) Debt securities available for sale: Balance of recurring Level 3 assets -December 31, 2023 $ 9,737 Change in fair value of Level 3 assets 174 Balance of recurring Level 3 assets - March 31, 2024 $ 9,911 Significant Unobservable Inputs (Level 3) (In thousands) Debt securities available for sale: Balance of recurring Level 3 assets -December 31, 2022 $ 12,123 Change in fair value of Level 3 assets (1,523) Balance of recurring Level 3 assets - March 31, 2023 $ 10,600 The fair value of investments placed in Level 3 is estimated by discounting the expected future cash flows using reasonably available current rates for comparable new issue securities with similar structure, including original maturity, call date, and assumptions about risk. Discounted cash flow estimated valuations are subsequently validated against comparable structures as an approximation of value. Expected cash flows were projected based on contractual cash flows. At both March 31, 2024 and December 31, 2023, two private placement corporate debt securities classified as available for sale, and two private placement municipal obligations classified as available for sale were included in Level 3 assets. There were no transfers to Level 3 assets during the three months ended March 31, 2024 and 2023. At March 31, 2024, private placement corporate debt security cash flows were discounted to a market yield of 12.00% (weighted average is 12.00%), and the cash flows for private placement municipal obligations were discounted to a market yield ranging from 3.51% to 3.65% (weighted average is 3.58%). The period end valuations were supported by an analysis prepared by an independent third party market participant and approved by management. 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 March 31, 2024 and December 31, 2023. 14. Fair Value Measurements (continued) Individually Analyzed Collateral Dependent Loans/Impaired Loans The fair value of collateral dependent loans that are individually analyzed or were previously deemed impaired 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 individually analyzed loans measured for impairment based on the fair value of the underlying collateral, fair value was estimated using a market approach. The Company measures the fair value of collateral underlying impaired loans primarily through obtaining independent appraisals that rely upon quoted market prices for similar assets in active markets. These appraisals include adjustments, on an individual case-by-case basis, to comparable assets based on the appraisers’ market knowledge and experience, as well as adjustments for estimated costs to sell between 6% and 8%. For non-collateral dependent loans, management estimates fair value using discounted cash flows based on inputs that are largely unobservable. 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 March 31, 2024 and December 31, 2023, by level within the fair value hierarchy: March 31, 2024 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 $ 4,860 $ — $ — $ 4,860 Mortgage servicing rights 2,756 — — 2,756 $ 7,616 $ — $ — $ 7,616 December 31, 2023 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 $ 5,000 $ — $ — $ 5,000 Mortgage servicing rights 2,908 — — 2,908 $ 7,908 $ — $ — $ 7,908 14. Fair Value Measurements (continued) The following table presents information for Level 3 assets measured at fair value on a non-recurring basis at March 31, 2024 and December 31, 2023: March 31, 2024 Fair Value Valuation Methodology Unobservable Inputs Range of Inputs Weighted Average Rate (Dollars in thousands) Impaired loans $ 4,860 Other A/R aging schedule — — Mortgage servicing rights $ 2,756 Discounted cash flow Prepayment speeds and discount rates (1) 4.9% - 27.0% 8.9 % December 31, 2023 Fair Value Valuation Methodology Unobservable Inputs Range of Inputs Weighted Average Rate (Dollars in thousands) Impaired loans $ 5,000 Other Contracted modification agreement. — % — % Mortgage servicing rights $ 2,908 Discounted cash flow Prepayment speeds and discount rates (1) 4.3% - 27.2% 8.1 % (1) Value of SBA servicing rights based on a discount rate of 15.50%. 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, consumer, and other. Each loan category is further segmented into fixed and adjustable rate interest terms and into performing and non-performing categories. The fair value of performing loans was estimated using a combination of techniques, including a discounted cash flow model that utilizes a discount rate that reflects the Company's current pricing for loans with similar characteristics and remaining maturity, adjusted by an amount for estimated credit losses inherent in the portfolio at the balance sheet date. The rates take into account the expected yield curve, as well as an adjustment for prepayment risk, when applicable. The Company classifies the estimated fair value of its loan portfolio as Level 3. The fair value for significant non-performing loans was based on recent external appraisals of collateral securing such loans, adjusted for the timing of anticipated cash flows. The Company classifies the estimated fair value of its non-performing loan portfolio as Level 3. Deposits The fair value of deposits with no stated maturity, such as demand, money market, and savings and club deposits are payable on demand at each reporting date and classified as Level 2. The estimated fair value of certificates of deposit was based on the discounted value of contractual cash flows. The discount rate was estimated using the Company’s current rates offered for deposits with similar remaining maturities. The Company classifies the estimated fair value of its certificates of deposit portfolio as Level 2. Borrowings The fair value of borrowings was estimated by discounting future cash flows using rates available for debt with similar terms and maturities and is classified by the Company as Level 2 within the fair value hierarchy. Commitments to Extend Credit and Letters of Credit The fair value of commitments to extend credit and letters of credit was estimated using the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the present creditworthiness of the counter-parties. For fixed rate loan commitments, fair value also considers the difference between current levels of interest rates and the committed rates. The fair value estimates of commitments to extend credit and letters of credit are deemed immaterial. The following tables present the assets and liabilities reported on the Consolidated Statements of Financial Condition at their fair values at March 31, 2024 and December 31, 2023: 14. Fair Value Measurements (continued) March 31, 2024 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 $ 373,472 $ 373,472 $ 373,472 $ — $ — Debt securities available for sale 1,187,440 1,187,440 229,844 947,685 9,911 Debt securities held to maturity 398,351 351,991 — 351,991 — Equity securities 4,430 4,430 4,107 323 — Federal Home Loan Bank stock 80,859 80,859 — 80,859 — Loans receivable, net 7,760,228 7,229,292 — — 7,229,292 Derivative assets 25,346 25,346 — 25,346 — Financial liabilities: Deposits $ 7,829,403 $ 7,811,709 $ — $ 7,811,709 $ — Borrowings 1,530,424 1,527,514 — 1,527,514 — Derivative liabilities 18,142 18,142 — 18,142 — December 31, 2023 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 $ 423,249 $ 423,249 $ 423,249 $ — $ — Debt securities available for sale 1,093,557 1,093,557 137,800 946,020 9,737 Debt securities held to maturity 401,154 357,177 — 357,177 — Equity securities 4,079 4,079 3,758 321 — Federal Home Loan Bank stock 81,022 81,022 — 81,022 — Loans receivable, net 7,819,441 7,366,184 — — 7,366,184 Derivative assets 18,898 18,898 — 18,898 — Financial liabilities: Deposits $ 7,846,556 $ 7,828,259 $ — $ 7,828,259 $ — Borrowings 1,528,695 1,531,179 — 1,531,179 — Derivative liabilities 25,025 25,025 — 25,025 — 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 intangible assets, deferred tax assets and liabilities, office properties and equipment, and bank-owned life insurance.

Other Comprehensive Income (Los

Other Comprehensive Income (Loss)	3 Months Ended
	Mar. 31, 2024
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 months ended March 31, 2024 and 2023: For the Three Months Ended March 31, 2024 2023 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: $ (6,948) $ 1,956 $ (4,992) $ 17,541 $ (4,472) $ 13,069 Accretion of unrealized gain (loss) on debt securities reclassified as held to maturity 5 (1) 4 (11) 4 (7) Reclassification adjustment for (loss) gain included in net income (1,256) 353 (903) (1,295) 366 (929) (8,199) 2,308 (5,891) 16,235 (4,102) 12,133 Derivatives: Unrealized gain (loss) on swap contracts accounted for as cash flow hedges 5,233 (1,473) 3,760 (1,203) 338 (865) 5,233 (1,473) 3,760 (1,203) 338 (865) Employee benefit plans: Amortization of prior service cost included in net income (14) 4 (10) (14) 4 (10) Reclassification adjustment of actuarial net (loss) gain included in net income (534) 150 (384) 1 — 1 Change in funded status of retirement obligations 589 (166) 423 26 153 179 41 (12) 29 13 157 170 Total other comprehensive income (loss) $ (2,925) $ 823 $ (2,102) $ 15,045 $ (3,607) $ 11,438 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 months ended March 31, 2024 and 2023: For the Three Months Ended March 31, 2024 2023 Unrealized (Losses) on Debt Securities Available for Sale Unrealized Gains (Losses) on Swaps Employee Benefit Plans Accumulated Other Comprehensive (Loss) Unrealized (Losses) on Debt Securities Available for Sale Unrealized Gains (Losses) on Swaps Employee Benefit Plans Accumulated Other Comprehensive (Loss) (In thousands) Balance at beginning of period $ (113,649) $ (414) $ (44,672) $ (158,735) $ (135,482) $ 504 $ (44,318) $ (179,296) Current period changes in other comprehensive income (loss) (5,891) 3,760 29 (2,102) 12,133 (865) 170 11,438 Total other comprehensive income (loss) $ (119,540) $ 3,346 $ (44,643) $ (160,837) $ (123,349) $ (361) $ (44,148) $ (167,858) 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 months ended March 31, 2024 and 2023: Accumulated Other Comprehensive Income (Loss) Components For the Three Months Ended March 31, Affected Line Items in the Consolidated Statements of Income 2024 2023 (In thousands) Reclassification adjustment for loss included in net income $ (1,256) $ (1,295) Loss on securities transactions Reclassification adjustment of actuarial net (loss) gain included in net income $ (534) $ 1 Other non-interest expense Total before tax (1,790) (1,294) Income tax benefit 503 366 Net of tax $ (1,287) $ (928)

Derivatives and Hedging Activit

Derivatives and Hedging Activities	3 Months Ended
	Mar. 31, 2024
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 March 31, 2024 and December 31, 2023, the Company had no currency forward contracts in place with commercial banking customers. Interest Rate Swaps. At March 31, 2024 and December 31, 2023, the Company had 82 and 80 interest rate swaps in place with commercial banking customers executed by offsetting interest rate swaps with third parties, with aggregated notional amounts of $350.0 million and $277.8 million, respectively. These derivatives are not designated as hedges and are not speculative. These interest rate swaps do not meet hedge accounting requirements. At March 31, 2024 and December 31, 2023, the Company had 33 and 30 interest rate swaps with notional amounts of $413.7 million and $380.0 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. At December 31, 2023, the Company had two interest rate swaps hedged against pools of floating rate commercial loans with notional amounts totaling $100.0 million. These 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. At March 31, 2024, the Company did not have any interest rate swaps hedged against pools of floating rate commercial loans. At March 31, 2024 and December 31, 2023, the Company had eight interest rate fair value swaps with notional amounts totaling $559.6 million and $700.0 million, respectively. The Company is exposed to changes in the fair value of certain of its fixed-rate pools of assets due to changes in benchmark interest rates. The Company uses interest rate swaps to manage its exposure to changes in fair value on these instruments attributable to changes in the designated benchmark interest rate, the Secured Overnight Financing Rate ("SOFR"). 16. Derivatives and Hedging Activities (continued) Interest rate swaps designated as fair value hedges involve the payment of fixed-rate amounts to a counterparty in exchange for the Company receiving variable-rate payments over the life of the agreements without the exchange of the underlying notional amount. For the three months ended March 31, 2024 and March 31, 2023, the Company recorded hedge ineffectiveness associated with these contracts totaling $36,000 and $4,000, respectively. 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 March 31, 2024 and December 31, 2023: March 31, 2024 Asset Derivative Liability Derivative Consolidated Statements of Financial Condition Fair Value Consolidated Statements of Financial Condition Fair Value (In thousands) Derivatives: Interest rate products - designated hedges Other Assets $ 9,326 Other Liabilities $ 2,224 Interest rate products - non-designated hedges Other Assets 16,020 Other Liabilities 15,918 Total derivative instruments $ 25,346 $ 18,142 December 31, 2023 Asset Derivative Liability Derivative Consolidated Statements of Financial Condition Fair Value Consolidated Statements of Financial Condition Fair Value (In thousands) Derivatives: Interest rate products - designated hedges Other Assets $ 5,394 Other Liabilities $ 11,530 Interest rate products - non-designated hedges Other Assets 13,504 Other Liabilities 13,495 Total derivative instruments $ 18,898 $ 25,025 For the three months ended March 31, 2024 and 2023, gains (losses) of $93,000 and $(193,000), respectively, were recorded for changes in fair value of interest rate swaps with third parties. At March 31, 2024 and December 31, 2023, accrued interest was $1.6 million and $1.2 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 March 31, 2024, the termination value of derivatives in a net asset position, which includes accrued interest, was $7.2 million. The Company normally has collateral posting thresholds with certain of its derivative counterparties, but as of March 31, 2024 had no posted collateral against its obligations under these agreements. 16. Derivatives and Hedging Activities (continued) Fair Value Hedges of Interest Rate Risk. The Company is exposed to changes in the fair value of certain of its fixed-rate pools of assets due to changes in benchmark interest rates. The Company uses interest rate swaps to manage its exposure to changes in fair value on these instruments attributable to changes in the designated benchmark interest rate, SOFR. Interest rate swaps designated as fair value hedges involve the payment of fixed-rate amounts to a counterparty in exchange for the Company receiving variable-rate payments over the life of the agreements without the exchange of the underlying notional amount. For derivatives designated and that qualify as fair value hedges, the gain or loss on the derivative as well as the offsetting gain or loss on the hedged item attributable to the hedged risk are recognized in interest income. At March 31, 2024, the following amounts were recorded on the Consolidated Statements of Financial Condition related to cumulative basis adjustment for fair value hedges: Carrying Amount of Hedged Assets/(Liabilities) Cumulative Amount of Fair Value Hedging Adjustment included in the Carrying Amount of Hedged Assets/(Liabilities) Carrying Amount of Hedged Assets/(Liabilities) Cumulative Amount of Fair Value Hedging Adjustment included in the Carrying Amount of Hedged Assets/(Liabilities) At March 31, 2024 At December 31, 2023 (In thousands) Fair value interest rate products $ 698,796 $ (1,204) $ 706,412 $ 6,412

Revenue Recognition

Revenue Recognition	3 Months Ended
	Mar. 31, 2024
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition The Company's revenue includes net interest income on financial instruments and non-interest income. Most of the Company's revenue is not within the scope of Accounting Standards Codification Topic 606 which 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 this guidance are components of non-interest income. These revenue streams can generally be classified as demand deposit account fees, title insurance fees, insurance agency income and other fees. The following table presents non-interest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the three months ended March 31, 2024 and 2023. For the Three Months Ended March 31, 2024 2023 (In thousands) Non-interest income In-scope of Topic 606: Demand deposit account fees $ 1,413 $ 1,176 Title insurance fees 503 587 Insurance agency income 48 39 Other non-interest income 1,480 2,483 Total in-scope non-interest income 3,444 4,285 Total out-of-scope non-interest income 4,008 3,788 Total non-interest income $ 7,452 $ 8,073 17. Revenue Recognition (continued) 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. RSI Insurance Agency, Inc. performs the function of an insurance intermediary, by introducing the policyholder and insurer for life and health, and property and casualty insurance, and is compensated by a commission fee for placement of an insurance policy. Commission and fees are generally recognized as of the effective date of the insurance policy. Commission revenues related to installment billings are recognized on the invoice date. Subsequent commission adjustments are recognized upon the receipt of notification from insurance companies concerning matters necessitating such adjustments. 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 swaps, gains and losses on the sale of loans and securities, credit card interchange income, and changes in the fair value of equity securities. None of these revenue streams are subject to the requirements of Topic 606.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2024
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events    The Company has evaluated events subsequent to March 31, 2024 and through the financial statement issuance date of May 10, 2024, and concluded that no material events occurred that would require disclosure.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Pay vs Performance Disclosure
Net (loss) income	$ (1,155)	$ 18,723

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Mar. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2024
Accounting Standards Update and Change in Accounting Principle [Abstract]
Accounting Pronouncements Adopted	Accounting Pronouncements Adopted In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280); Improvements to Reportable Segment Disclosures. ASU 2023-07 enhances segment reporting under Topic 820 by expanding the breadth and frequency of segment disclosures. The ASU requires a public entity to disclosure entity-wide and segment information in the notes to the financial statements. Disclosures include the measure of profit or loss that the chief operating decision maker uses to assess segment performance and decisions how to allocate resources, as well as certain specified amounts included in that measure. This ASU was effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. The Company adopted this ASU on January 1, 2024 on a retrospective basis for all periods presented. As it is only disclosure related, this ASU did not have an impact on the Company's consolidated financial statements.
Loans Receivable	The Company has an accounting policy election to exclude accrued interest receivable from the amortized cost basis of loans receivable. Accrued interest receivable on loans receivable is reported as a component of accrued interest receivable in the Consolidated Statement of Financial Condition, which totaled $33.7 million and $32.9 million at March 31, 2024 and December 31, 2023, respectively, and is excluded from the estimate of credit losses. The determination of the allowance for credit losses (“ACL”) on loans is considered a critical accounting estimate by management because of the high degree of judgment involved in determining qualitative loss factors, the subjectivity of the assumptions used, and the potential for changes in the forecasted economic environment The ACL is maintained at a level management considers adequate to provide for estimated losses and impairment based upon an evaluation of known and inherent risk in the loan portfolio. The ACL consists of two elements: (1) identification of loans that must be individually analyzed for impairment and (2) establishment of an ACL for loans collectively analyzed. Management estimates the ACL using relevant and reliable information from internal and external sources, related to past events, current conditions, and a reasonable and supportable forecast. Historical credit loss experience for both the Company and its segment-specific peers provides the basis for the estimate of expected credit losses. Credit losses over a defined period are converted to PD rate curves through the use of segment-specific LGD risk factors that convert default rates to loss severity based on industry-level, observed relationships between the two variables for each segment, primarily due to the nature of the underlying collateral. These risk factors were assessed for reasonableness against the Company’s own loss experience and adjusted in certain cases when the relationship between the Company’s historical default and loss severity deviate from that of the wider industry. The historical PD curves, together with corresponding economic conditions, establish a quantitative relationship between economic conditions and loan performance through an economic cycle. Portfolio segments are defined as the level at which an entity develops and documents a systematic methodology to determine its allowance for credit losses. Management developed segments for estimating losses based on the type of borrower and collateral which is generally based upon federal call report segmentation. The segments have been combined or sub-segments have been added as needed to ensure loans of similar risk profiles are appropriately pooled. We maintain a loan review system that provides a periodic review of the loan portfolio and the identification of individually analyzed loans. The ACL for individually analyzed loans is based on the fair value of collateral or cash flows. While management uses the best information available to make such evaluations, future adjustments to the allowance may be necessary if economic conditions differ substantially from the assumptions used in making the evaluations. 9. Loans Receivable and Allowance for Credit Losses (continued) The ACL quantitative allowance for each segment is measured using a discounted cash flow methodology incorporating an econometric, probability of default (“PD”) and loss given default (“LGD”) with distinct segment-specific multi-variate regression models applied. Expected credit losses are estimated over the life of the loans by measuring the difference between the net present value of modeled cash flows and amortized cost basis. Contractual cash flows over the contractual life of the loans are the basis for the modeled cash flows, adjusted for model defaults and expected prepayments and discounted at the loan-level effective interest rate. The contractual term excludes expected extensions, renewals, and modifications. Management estimates the ACL using relevant and reliable information from internal and external sources, related to past events, current conditions, and a reasonable and supportable forecast. Historical credit loss experience for both the Company and its segment-specific peers provides the basis for the estimate of expected credit losses. Credit losses over a defined period are converted to PD rate curves through the use of segment-specific LGD risk factors that convert default rates to loss severity based on industry-level, observed relationships between the two variables for each segment, primarily due to the nature of the underlying collateral. These risk factors were assessed for reasonableness against the Company’s own loss experience and adjusted in certain cases when the relationship between the Company’s historical default and loss severity deviate from that of the wider industry. The historical PD curves, together with corresponding economic conditions, establish a quantitative relationship between economic conditions and loan performance through an economic cycle. Using the historical relationship between economic conditions and loan performance, management’s expectation of future loan performance is incorporated using a single economic forecast of macroeconomic variables (i.e., unemployment, gross domestic product, vacancy, and home price index). This forecast is applied over a period that management has determined to be reasonable and supportable. Beyond the period over which management can develop or source a reasonable and supportable forecast, the model reverts to long-term average historical loss rates using a straight-line, time-based methodology. The Company's current forecast period is six quarters, with a four-quarter reversion period to long-term average historical loss rates. After quantitative considerations, management applies additional qualitative adjustments that consider the expected impact of certain factors not fully captured in the quantitative reserve. Qualitative adjustments include but are not limited to concentrations of large loan balances, delinquency trends, change in collateral values within segments, and other considerations. The ACL is established through the provision for credit losses that are charged to income, which is based upon an evaluation of estimated losses in the current loan portfolio, including the evaluation of individually analyzed loans. Charge-offs against the ACL are taken on loans where management determines that the collection of loan principal and interest is unlikely. Recoveries made on loans that have been charged-off are credited to the ACL. Although we believe we have established and maintained the ACL on loans at appropriate levels, changes in reserves may be necessary if actual economic and other conditions differ substantially from the forecast used in estimating the ACL. Our financial results are affected by the changes in and the level of the ACL. This process involves our analysis of internal and external variables, and it requires that we exercise judgment to estimate an appropriate ACL. As a result of the uncertainty associated with this subjectivity, we cannot assure the precision of the amount reserved, should we experience sizable loan losses in any particular period and/or significant changes in assumptions or economic condition. We believe the primary risks inherent in the portfolio are a general decline in the economy, a decline in real estate market values, rising unemployment, increasing vacancy rates, and increases in interest rates in the absence of economic improvement or any other such factors. Any one or a combination of these events may adversely affect a borrower's ability to repay its loan, resulting in increased delinquencies and loan losses. Accordingly, we have recorded loan credit losses at a level which is estimated to represent the current risk in its loan portfolio. Most of our non-performing assets are collateral dependent loans which are written down to the fair value of the collateral less estimated costs to sell. We continue to assess the collateral of these loans and update our appraisals on these loans on an annual basis. To the extent the property values decline, there could be additional losses on these non-performing assets, which may be material. Management considered these market conditions in deriving the estimated ACL. Should economic difficulties occur, the ultimate amount of loss could vary from our current estimate.
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, matrix pricing and discounted cash flow 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. Discounted cash flows, a Level 3 input, is estimated by discounting the expected future cash flows using the current rates for securities with similar credit ratings and similar remaining maturities. 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. The Company classifies the estimated fair value of its loan portfolio as Level 3. 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. Individually Analyzed Collateral Dependent Loans/Impaired Loans The fair value of collateral dependent loans that are individually analyzed or were previously deemed impaired 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 individually analyzed loans measured for impairment based on the fair value of the underlying collateral, fair value was estimated using a market approach. The Company measures the fair value of collateral underlying impaired loans primarily through obtaining independent appraisals that rely upon quoted market prices for similar assets in active markets. These appraisals include adjustments, on an individual case-by-case basis, to comparable assets based on the appraisers’ market knowledge and experience, as well as adjustments for estimated costs to sell between 6% and 8%. For non-collateral dependent loans, management estimates fair value using discounted cash flows based on inputs that are largely unobservable. 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, consumer, and other. Each loan category is further segmented into fixed and adjustable rate interest terms and into performing and non-performing categories. The fair value of performing loans was estimated using a combination of techniques, including a discounted cash flow model that utilizes a discount rate that reflects the Company's current pricing for loans with similar characteristics and remaining maturity, adjusted by an amount for estimated credit losses inherent in the portfolio at the balance sheet date. The rates take into account the expected yield curve, as well as an adjustment for prepayment risk, when applicable. The Company classifies the estimated fair value of its loan portfolio as Level 3. The fair value for significant non-performing loans was based on recent external appraisals of collateral securing such loans, adjusted for the timing of anticipated cash flows. The Company classifies the estimated fair value of its non-performing loan portfolio as Level 3. Deposits The fair value of deposits with no stated maturity, such as demand, money market, and savings and club deposits are payable on demand at each reporting date and classified as Level 2. The estimated fair value of certificates of deposit was based on the discounted value of contractual cash flows. The discount rate was estimated using the Company’s current rates offered for deposits with similar remaining maturities. The Company classifies the estimated fair value of its certificates of deposit portfolio as Level 2. 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 intangible assets, deferred tax assets and liabilities, office properties and equipment, and bank-owned life insurance.

Earnings per Share (Tables)

Earnings per Share (Tables)	3 Months Ended
	Mar. 31, 2024
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 months ended March 31, 2024 and 2023: For the Three Months Ended March 31, 2024 2023 (In thousands, except per share data) Net (loss) income $ (1,155) $ 18,723 Shares: Weighted average shares outstanding - basic 101,746,740 104,631,583 Weighted average diluted shares outstanding 241,685 516,792 Weighted average shares outstanding - diluted 101,988,425 105,148,375 Earnings per share: Basic $ (0.01) $ 0.18 Diluted $ (0.01) $ 0.18

Debt Securities Available for_2

Debt Securities Available for Sale (Tables)	3 Months Ended
	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Schedule of Debt Securities, Available-for-Sale	D ebt securities available for sale at March 31, 2024 and December 31, 2023 are summarized as follows: March 31, 2024 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value (In thousands) U.S. government and agency obligations $ 239,128 $ 225 $ (2,319) $ 237,034 Mortgage-backed securities and collateralized mortgage obligations 1,018,854 1 (149,638) 869,217 Municipal obligations 2,768 — (60) 2,708 Corporate debt securities 92,548 — (14,067) 78,481 $ 1,353,298 $ 226 $ (166,084) $ 1,187,440 December 31, 2023 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value (In thousands) U.S. government and agency obligations $ 146,387 $ 924 $ (1,810) $ 145,501 Mortgage-backed securities and collateralized mortgage obligations 1,009,508 20 (141,943) 867,585 Municipal obligations 2,770 — (68) 2,702 Corporate debt securities 92,565 2 (14,798) 77,769 $ 1,251,230 $ 946 $ (158,619) $ 1,093,557
Schedule of Securities by Contractual Maturity	The amortized cost and fair value of debt securities available for sale at March 31, 2024, 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. March 31, 2024 Amortized Cost Fair Value (In thousands) One year or less $ 65,637 $ 65,638 More than one year to five years 200,010 196,755 More than five years to ten years 68,797 55,830 $ 334,444 $ 318,223 Mortgage-backed securities and collateralized mortgage obligations 1,018,854 869,217 $ 1,353,298 $ 1,187,440 The amortized cost and fair value of debt securities held to maturity at March 31, 2024, 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. March 31, 2024 Amortized Cost Fair Value (In thousands) More than one year to five years $ 29,875 $ 27,610 More than five years to ten years 9,996 8,483 More than ten years 10,000 7,714 49,871 43,807 Mortgage-backed securities and collateralized mortgage obligations 348,480 308,184 $ 398,351 $ 351,991
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 March 31, 2024 and December 31, 2023 and if the unrealized loss position was continuous for the twelve months prior to those respective dates: March 31, 2024 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 $ 102,990 $ (440) $ 25,704 $ (1,879) $ 128,694 $ (2,319) Mortgage-backed securities and collateralized mortgage obligations 28,787 (129) 840,015 (149,509) 868,802 (149,638) Municipal obligations — — 2,708 (60) 2,708 (60) Corporate debt securities — — 78,481 (14,067) 78,481 (14,067) $ 131,777 $ (569) $ 946,908 $ (165,515) $ 1,078,685 $ (166,084) 6. Debt Securities Available for Sale (continued) December 31, 2023 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 $ — $ — $ 21,344 $ (1,810) $ 21,344 $ (1,810) Mortgage-backed securities and collateralized mortgage obligations 54 (4) 863,026 (141,939) 863,080 (141,943) Municipal obligations — — 2,702 (68) 2,702 (68) Corporate debt securities — — 75,765 (14,798) 75,765 (14,798) $ 54 $ (4) $ 962,837 $ (158,615) $ 962,891 $ (158,619)

Debt Securities Held to Matur_2

Debt Securities Held to Maturity (Tables)	3 Months Ended
	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Schedule of Debt Securities, Held-to-Maturity	Debt securities held to maturity at March 31, 2024 and December 31, 2023 are summarized as follows: March 31, 2024 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Allowance for Credit Losses Fair Value U.S. government and agency obligations $ 49,871 $ — $ (6,064) $ — $ 43,807 Mortgage-backed securities and collateralized mortgage obligations 348,480 — (40,296) — 308,184 $ 398,351 $ — $ (46,360) $ — $ 351,991 7. Debt Securities Held to Maturity (continued) December 31, 2023 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Allowance for Credit Losses Fair Value (In thousands) U.S. government and agency obligations $ 49,871 $ — $ (5,902) $ — $ 43,969 Mortgage-backed securities and collateralized mortgage obligations 351,283 — (38,075) — 313,208 $ 401,154 $ — $ (43,977) $ — $ 357,177
Schedule of Securities by Contractual Maturity	The amortized cost and fair value of debt securities available for sale at March 31, 2024, 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. March 31, 2024 Amortized Cost Fair Value (In thousands) One year or less $ 65,637 $ 65,638 More than one year to five years 200,010 196,755 More than five years to ten years 68,797 55,830 $ 334,444 $ 318,223 Mortgage-backed securities and collateralized mortgage obligations 1,018,854 869,217 $ 1,353,298 $ 1,187,440 The amortized cost and fair value of debt securities held to maturity at March 31, 2024, 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. March 31, 2024 Amortized Cost Fair Value (In thousands) More than one year to five years $ 29,875 $ 27,610 More than five years to ten years 9,996 8,483 More than ten years 10,000 7,714 49,871 43,807 Mortgage-backed securities and collateralized mortgage obligations 348,480 308,184 $ 398,351 $ 351,991
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 March 31, 2024 and December 31, 2023 and if the unrealized loss position was continuous for the twelve months prior to those respective dates: March 31, 2024 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 $ — $ — $ 43,807 $ (6,064) $ 43,807 $ (6,064) Mortgage-backed securities and collateralized mortgage obligations — — 308,183 (40,296) 308,183 (40,296) $ — $ — $ 351,990 $ (46,360) $ 351,990 $ (46,360) December 31, 2023 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 $ — $ — $ 43,969 $ (5,902) $ 43,969 $ (5,902) Mortgage-backed securities and collateralized mortgage obligations — — 313,208 (38,075) 313,208 (38,075) $ — $ — $ 357,177 $ (43,977) $ 357,177 $ (43,977)

Loans Receivable and Allowanc_2

Loans Receivable and Allowance for Credit Losses (Tables)	3 Months Ended
	Mar. 31, 2024
Receivables [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable	Loans receivable at March 31, 2024 and December 31, 2023 are summarized as follows: March 31, December 31, 2024 2023 (In thousands) Real estate loans: One-to-four family $ 2,778,932 $ 2,792,833 Multifamily 1,429,369 1,409,187 Commercial real estate 2,318,178 2,377,077 Construction 437,566 443,094 Commercial business loans 538,260 533,041 Consumer loans: Home equity loans and advances 260,786 266,632 Other consumer loans 2,601 2,801 Total gross loans 7,765,692 7,824,665 Purchased credit-deteriorated ("PCD") loans 14,945 15,089 Net deferred loan costs, fees and purchased premiums and discounts 34,992 34,783 Loans receivable $ 7,815,629 $ 7,874,537
Financing Receivable, Past Due	The following tables summarize the aging of loans receivable by portfolio segment, including non-accrual loans and excluding PCD loans at March 31, 2024 and December 31, 2023: March 31, 2024 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 $ 8,736 $ 3,293 $ 3,455 $ 15,484 $ 5,287 $ 2,763,448 $ 2,778,932 Multifamily 1,111 — — 1,111 — 1,428,258 1,429,369 Commercial real estate 5,762 — 1,942 7,704 8,456 2,310,474 2,318,178 Construction — — — — — 437,566 437,566 Commercial business loans 3,650 3,949 876 8,475 8,990 529,785 538,260 Consumer loans: Home equity loans and advances 682 — 187 869 202 259,917 260,786 Other consumer loans — — — — — 2,601 2,601 Total loans $ 19,941 $ 7,242 $ 6,460 $ 33,643 $ 22,935 $ 7,732,049 $ 7,765,692 December 31, 2023 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 $ 11,079 $ 4,254 $ 1,558 $ 16,891 $ 3,139 $ 2,775,942 $ 2,792,833 Multifamily — — — — — 1,409,187 1,409,187 Commercial real estate 1,711 2,472 2,740 6,923 2,740 2,370,154 2,377,077 Construction — — — — — 443,094 443,094 Commercial business loans 1,727 4,917 6,518 13,162 6,518 519,879 533,041 Consumer loans: Home equity loans and advances 779 14 170 963 221 265,669 266,632 Other consumer loans 1 — — 1 — 2,800 2,801 Total loans $ 15,297 $ 11,657 $ 10,986 $ 37,940 $ 12,618 $ 7,786,725 $ 7,824,665
Financing Receivable, Allowance for Credit Loss	The following tables summarize loans receivable (including PCD loans) and allowance for credit losses by portfolio segment and impairment method at March 31, 2024 and December 31, 2023: March 31, 2024 One-to-Four Family Multifamily Commercial Real Estate Construction Commercial Business Home Equity Loans and Advances Other Consumer Loans Total (In thousands) Allowance for credit losses: Individually analyzed loans $ 35 $ — $ 226 $ — $ 98 $ — $ — $ 359 Collectively analyzed loans 13,800 8,670 14,947 8,068 7,611 1,872 7 54,975 Loans acquired with deteriorated credit quality 5 — 59 — 2 1 — 67 Total $ 13,840 $ 8,670 $ 15,232 $ 8,068 $ 7,711 $ 1,873 $ 7 $ 55,401 Total loans: Individually analyzed loans $ 1,728 $ 46 $ 9,695 $ — $ 9,115 $ 110 $ — $ 20,694 Collectively analyzed loans 2,777,204 1,429,323 2,308,483 437,566 529,145 260,676 2,601 7,744,998 Loans acquired with deteriorated credit quality 1,873 — 12,591 — 344 137 — 14,945 Total loans $ 2,780,805 $ 1,429,369 $ 2,330,769 $ 437,566 $ 538,604 $ 260,923 $ 2,601 $ 7,780,637 9. Loans Receivable and Allowance for Credit Losses (continued) December 31, 2023 One-to-Four Family Multifamily Commercial Real Estate Construction Commercial Business Home Equity Loans and Advances Other Consumer Loans Total (In thousands) Allowance for credit losses: Individually analyzed loans $ 186 $ 7 $ 237 $ — $ 154 $ 30 $ — $ 614 Collectively analyzed loans 12,827 8,735 15,378 7,758 7,742 1,862 7 54,309 Loans acquired with deteriorated credit quality 4 — 142 — 27 — — 173 Total $ 13,017 $ 8,742 $ 15,757 $ 7,758 $ 7,923 $ 1,892 $ 7 $ 55,096 Total loans: Individually analyzed loans $ 4,063 $ 382 $ 15,360 $ — $ 11,550 $ 601 $ — $ 31,956 Collectively analyzed loans 2,788,770 1,408,805 2,361,717 443,094 521,491 266,031 2,801 7,792,709 Loans acquired with deteriorated credit quality 1,893 — 12,689 — 369 138 — 15,089 Total loans $ 2,794,726 $ 1,409,187 $ 2,389,766 $ 443,094 $ 533,410 $ 266,770 $ 2,801 $ 7,839,754 The activity in the allowance for credit losses by portfolio segment for the three months ended March 31, 2024 and 2023 are as follows: For the Three Months Ended March 31, One-to-Four Family Multifamily Commercial Real Estate Construction Commercial Business Home Equity Loans and Advances Other Consumer Loans Totals (In thousands) 2024 Balance at beginning of period $ 13,017 $ 8,742 $ 15,757 $ 7,758 $ 7,923 $ 1,892 $ 7 $ 55,096 Provision for (reversal of) credit losses 825 (72) (525) 309 4,665 (24) 100 5,278 Recoveries — — — 1 143 5 — 149 Charge-offs (2) — — — (5,020) — (100) (5,122) Balance at end of period $ 13,840 $ 8,670 $ 15,232 $ 8,068 $ 7,711 $ 1,873 $ 7 $ 55,401 2023 Balance at beginning of period $ 11,802 $ 7,877 $ 18,111 $ 6,425 $ 6,897 $ 1,681 $ 10 $ 52,803 Provision for (reversal of) credit losses 1,121 268 (1,768) 314 272 (61) 29 175 Recoveries — — — — 151 20 5 176 Charge-offs (134) — (86) — — (26) (35) (281) Balance at end of period $ 12,789 $ 8,145 $ 16,257 $ 6,739 $ 7,320 $ 1,614 $ 9 $ 52,873 The following table presents the activity in the allowance for credit losses on off-balance-sheet exposures for the three months ended March 31, 2024 and 2023: March 31, 2024 2023 (In thousands) Allowance for Credit Losses: Beginning balance $ 5,484 $ 6,970 (Reversal of) provision for credit losses (830) (528) Balance at end of period $ 4,654 $ 6,442
Financing Receivable, Modified	The following table presents the modifications of loans to borrowers experiencing financial difficulty that were modified during the three months ended March 31, 2024: For the Three Months Ended March 31, 2024 Amortized Cost Term Extension Combination of Term Extension, Interest Rate Reduction, and Principal Forgiveness % of Total Class of Loans Receivable (In thousands) Commercial business $ 3,700 $ 3,700 $ — 0.69 % Total loans $ 3,700 $ 3,700 $ — 0.05 % The following table describes the types of modifications of loans to borrowers experiencing financial difficulty during the three months ended March 31, 2024: For the Three Months Ended March 31, 2024 Type of Modifications Commercial business 15 month term extension The following tables presents the aging analysis of modifications of loans to borrowers experiencing financial difficulty at March 31, 2024 and December 31, 2023: March 31, 2024 Current 30-59 Days 60-89 Days 90 Days or More Non-accrual Total (In thousands) Commercial real estate $ 1,031 $ — $ — $ — $ — $ 1,031 Commercial business — — — — 5,656 5,656 Total loans $ 1,031 $ — $ — $ — $ 5,656 $ 6,687 9. Loans Receivable and Allowance for Credit Losses (continued) December 31, 2023 Current 30-59 Days 60-89 Days 90 Days or More Non-accrual Total (In thousands) Commercial real estate $ 1,035 $ — $ — $ — $ — $ 1,035 Construction 2,317 — — — — 2,317 Commercial business — — 4,917 — 237 5,154 Total loans $ 3,352 $ — $ 4,917 $ — $ 237 $ 8,506
Impaired Financing Receivables	The following tables present loans individually analyzed loans by segment, excluding PCD loans, at March 31, 2024 and December 31, 2023: At March 31, 2024 Recorded Investment Unpaid Principal Balance Specific Allowance (In thousands) With no allowance recorded: Real estate loans: One-to-four family $ 1,139 $ 1,423 $ — Multifamily 46 50 — Commercial real estate 1,942 2,908 — Commercial business loans 4,865 4,865 — Consumer loans: Home equity loans and advances 110 128 — 8,102 9,374 — With a specific allowance recorded: Real estate loans: One-to-four family 589 589 35 Commercial real estate 7,753 8,412 226 Commercial business loans 4,250 4,249 98 12,592 13,250 359 Total: Real estate loans: One-to-four family 1,728 2,012 35 Multifamily 46 50 — Commercial real estate 9,695 11,320 226 Commercial business loans 9,115 9,114 98 Consumer loans: Home equity loans and advances 110 128 — Total loans $ 20,694 $ 22,624 $ 359 9. Loans Receivable and Allowance for Credit Losses (continued) At December 31, 2023 Recorded Investment Unpaid Principal Balance Specific Allowance (In thousands) With no allowance recorded: Real estate loans: One-to-four family $ 1,170 $ 1,519 $ — Multifamily 49 52 — Commercial real estate 12,741 14,364 — Commercial business loans 5,814 6,764 — Consumer loans: Home equity loans and advances 145 163 — 19,919 22,862 — With a specific allowance recorded: Real estate loans: One-to-four family 2,893 2,911 186 Multifamily 333 333 7 Commercial real estate 2,619 2,622 237 Commercial business loans 5,736 5,736 154 Consumer loans: Home equity loans and advances 456 456 30 12,037 12,058 614 Total: Real estate loans: One-to-four family 4,063 4,430 186 Multifamily 382 385 7 Commercial real estate 15,360 16,986 237 Commercial business loans 11,550 12,500 154 Consumer loans: Home equity loans and advances 601 619 30 $ 31,956 $ 34,920 $ 614 For the Three Months Ended March 31, 2024 2023 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (In thousands) Real estate loans: One-to-four family $ 2,896 $ 13 $ 4,459 $ 45 Multifamily 214 1 448 5 Commercial real estate 12,528 20 16,252 151 Commercial business loans 10,333 — 1,904 49 Consumer loans: Home equity loans and advances 356 1 688 7 Total loans $ 26,327 $ 35 $ 23,751 $ 257
Financing Receivable Credit Quality Indicators	The following table summarizes the Company's loans by year of origination and internally assigned credit risk rating, excluding PCD loans, at March 31, 2024 and December 31, 2023: Loans by Year of Origination at March 31, 2024 2024 2023 2022 2021 2020 Prior Revolving Loans Revolving Loans to Term Loans Total (In thousands) One-to-Four Family Pass $ 22,636 $ 157,523 $ 785,252 $ 783,100 $ 267,209 $ 757,084 $ — $ — $ 2,772,804 Special mention — — — — — — — — — Substandard — 751 1,398 1,064 291 2,624 — — 6,128 Total One-to-Four Family 22,636 158,274 786,650 784,164 267,500 759,708 — — 2,778,932 Gross charge-offs — — — — — 2 — — 2 Multifamily Pass — 117,242 320,866 365,098 169,203 452,444 — — 1,424,853 Special mention — — — — — 4,516 — — 4,516 Substandard — — — — — — — — — Total Multifamily — 117,242 320,866 365,098 169,203 456,960 — — 1,429,369 Gross charge-offs — — — — — — — — — Commercial Real Estate Pass 13,969 182,962 431,612 362,730 164,245 1,105,621 — — 2,261,139 Special mention — — — 463 — 22,285 — — 22,748 Substandard — — 5,743 — 1,793 26,755 — — 34,291 Total Commercial Real Estate 13,969 182,962 437,355 363,193 166,038 1,154,661 — — 2,318,178 Gross charge-offs — — — — — — — — — Construction Pass 6,343 119,856 251,745 59,622 — — — — 437,566 Special mention — — — — — — — — — Substandard — — — — — — — — — Total Construction 6,343 119,856 251,745 59,622 — — — — 437,566 Gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — 9. Loans Receivable and Allowance for Credit Losses (continued) Loans by Year of Origination at March 31, 2024 2024 2023 2022 2021 2020 Prior Revolving Loans Revolving Loans to Term Loans Total (In thousands) Commercial Business Pass $ 16,089 $ 59,522 $ 56,408 $ 27,402 $ 25,746 $ 50,048 $ 274,391 $ — $ 509,606 Special mention — — — — 66 931 1,878 — 2,875 Substandard — 392 452 83 56 7,914 16,484 — 25,381 Doubtful — — — — — 398 — — 398 Total Commercial Business 16,089 59,914 56,860 27,485 25,868 59,291 292,753 — 538,260 Gross charge-offs — — — 2,352 — 2,668 — — 5,020 Home Equity Loans and Advances Pass 3,939 19,264 20,289 17,744 10,997 89,436 32,577 66,338 260,584 Special mention — — — — — — — — — Substandard — — — — — 202 — — 202 Total Home Equity Loans and Advances 3,939 19,264 20,289 17,744 10,997 89,638 32,577 66,338 260,786 Gross charge-offs — — — — — — — — — Other Consumer Loans Pass 1,932 133 134 18 3 74 307 — 2,601 Special mention — — — — — — — — — Substandard — — — — — — — — — Total Other Consumer Loans 1,932 133 134 18 3 74 307 — 2,601 Gross charge-offs — 24 52 22 — 2 — — 100 Total Loans 64,908 657,645 1,873,899 1,617,324 639,609 2,520,332 325,637 66,338 7,765,692 Total gross charge-offs $ — $ 24 $ 52 $ 2,374 $ — $ 2,672 $ — $ — $ 5,122 9. Loans Receivable and Allowance for Credit Losses (continued) Loans by Year of Origination at December 31, 2023 2023 2022 2021 2020 2019 Prior Revolving Loans Revolving Loans to Term Loans Total (In thousands) One-to-Four Family Pass $ 156,279 $ 786,735 $ 793,074 $ 272,215 $ 165,337 $ 614,351 $ — $ — $ 2,787,991 Special mention — — — — — — — — — Substandard — 1,176 769 283 629 1,985 — — 4,842 Total One-to-Four family 156,279 787,911 793,843 272,498 165,966 616,336 — — 2,792,833 Gross charge-offs — 208 197 — 29 151 — — 585 Multifamily Pass 111,612 317,277 359,983 157,294 202,923 255,578 — — 1,404,667 Special mention — — — — — 4,520 — — 4,520 Substandard — — — — — — — — — Total Multifamily 111,612 317,277 359,983 157,294 202,923 260,098 — — 1,409,187 Gross charge-offs — — — — — — — — — Commercial Real Estate Pass 191,030 422,058 371,578 174,705 236,263 930,740 — — 2,326,374 Special mention — — 465 — 871 24,405 — — 25,741 Substandard — 5,743 905 1,799 — 16,515 — — 24,962 Total Commercial Real Estate 191,030 427,801 372,948 176,504 237,134 971,660 — — 2,377,077 Gross charge-offs — — — — 64 86 — — 150 Construction Pass 99,634 270,397 65,374 4,933 439 2,317 — — 443,094 Special mention — — — — — — — — — Substandard — — — — — — — — — Total Construction 99,634 270,397 65,374 4,933 439 2,317 — — 443,094 Gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — 9. Loans Receivable and Allowance for Credit Losses (continued) Loans by Year of Origination at December 31, 2023 2023 2022 2021 2020 2019 Prior Revolving Loans Revolving Loans to Term Loans Total (In thousands) Commercial Business Pass $ 67,529 $ 58,118 $ 28,989 $ 27,194 $ 15,499 $ 38,954 $ 272,698 $ — $ 508,981 Special mention 127 303 — 97 14 1,389 4,587 — 6,517 Substandard — 76 88 6 1,081 6,150 10,142 — 17,543 Total Commercial Business 67,656 58,497 29,077 27,297 16,594 46,493 287,427 — 533,041 Gross charge-offs — — 31 34 2,249 304 — — 2,618 Home Equity Loans and Advances Pass 20,198 20,713 18,139 11,368 9,877 84,261 37,261 64,558 266,375 Special mention — — — — — — — — — Substandard — — — — — 257 — — 257 Total Home Equity Loans and Advances 20,198 20,713 18,139 11,368 9,877 84,518 37,261 64,558 266,632 Gross charge-offs — — — — — 26 — — 26 Other Consumer Loans Pass 2,199 151 38 6 18 68 321 — 2,801 Special mention — — — — — — — — — Substandard — — — — — — — — — Total Other Consumer Loans 2,199 151 38 6 18 68 321 — 2,801 Gross charge-offs — 61 52 — — 2 — — 115 Total Loans 648,608 1,882,747 1,639,402 649,900 632,951 1,981,490 325,009 64,558 7,824,665 Total gross charge-offs $ — $ 269 $ 280 $ 34 $ 2,342 $ 569 $ — $ — $ 3,494

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2024
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: Lease Payment Obligations at March 31, December 31, 2024 2023 (In thousands) One year or less $ 3,314 $ 4,204 After one year to two years 4,037 3,536 After two years to three years 3,576 3,154 After three years to four years 2,694 2,271 After four years to five years 2,227 1,807 Thereafter 3,212 2,974 Total undiscounted cash flows 19,060 17,946 Discount on cash flows (1,574) (1,411) Total lease liability $ 17,486 $ 16,535

Deposits (Tables)

Deposits (Tables)	3 Months Ended
	Mar. 31, 2024
Deposits [Abstract]
Schedule of Deposits	Deposits at March 31, 2024 and December 31, 2023 are summarized as follows: March 31, December 31, 2024 2023 (In thousands) Non-interest-bearing demand $ 1,415,909 $ 1,437,361 Interest-bearing demand 1,929,490 1,966,463 Money market accounts 1,228,098 1,255,528 Savings and club deposits 687,303 700,348 Certificates of deposit 2,568,603 2,486,856 Total deposits $ 7,829,403 $ 7,846,556
Schedule of Certificate Accounts by Maturity	Scheduled maturities of certificates of deposit accounts at March 31, 2024 and December 31, 2023 are summarized as follows: March 31, December 31, 2024 2023 (In thousands) One year or less $ 2,202,994 $ 2,077,863 After one year to two years 287,263 321,271 After two years to three years 50,734 57,836 After three years to four years 11,905 13,427 After four years 15,707 16,459 $ 2,568,603 $ 2,486,856

Stock Based Compensation (Table

Stock Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2024
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 months ended March 31, 2024 and 2023: Number of Restricted Shares Weighted Average Grant Date Fair Value Non-vested at January 1, 2024 435,541 $ 16.77 Grants 212,441 16.50 Vested (25,890) 20.14 Forfeited (1,545) 16.54 Non-vested at March 31, 2024 620,547 $ 16.54 Number of Restricted Shares Weighted Average Grant Date Fair Value Non-vested at January 1, 2023 430,954 $ 17.31 Vested (26,424) 21.16 Forfeited (1,929) 21.12 Non-vested at March 31, 2023 402,601 $ 17.10
Share-based Payment Arrangement, Option, Activity	The following is a summary of the Company's option activity during the three months ended March 31, 2024 and 2023: Number of Stock Options Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value Outstanding, January 1, 2024 3,584,069 $ 16.20 6.1 $ 11,602,267 Granted 286,265 16.49 — — Exercised (28,051) 15.60 — — Expired (1,412) 15.60 — — Forfeited (5,832) 17.29 — — Outstanding, March 31, 2024 3,835,039 $ 16.22 6.2 $ 5,050,150 Options exercisable at March 31, 2024 2,569,155 $ 16.12 5.6 $ 3,590,728 Number of Stock Options Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value Outstanding, January 1, 2023 3,436,869 $ 16.26 6.9 $ 18,435,239 Exercised (3,618) 15.60 — — Expired (2,117) 15.60 — — Forfeited (8,055) 20.03 — — Outstanding, March 31, 2023 3,423,079 $ 16.25 6.7 $ 7,893,117 Options exercisable at March 31, 2023 1,880,693 $ 15.85 6.4 $ 4,711,769

Components of Net Periodic Be_2

Components of Net Periodic Benefit Cost (Tables)	3 Months Ended
	Mar. 31, 2024
Retirement Benefits [Abstract]
Schedule of Net Benefit Costs	Net periodic (income) benefit cost for the Pension Plan, RIM Plan, Post-retirement Plan and Split-Dollar Life Insurance plan benefits for the three months ended March 31, 2024 and 2023, includes the following components: For the Three Months Ended March 31, Pension Plan (1) RIM Plan Post-retirement Plan Split-Dollar Life Insurance 2024 2023 2024 2023 2024 2023 2024 2023 Affected Line Item in the Consolidated Statements of Income (In thousands) Service cost $ 1,212 $ 1,199 $ 61 $ 69 $ 54 $ 54 $ 57 $ 69 Compensation and employee benefits Interest cost 3,100 2,790 162 158 248 242 208 204 Other non-interest expense Expected return on plan assets (8,119) (7,479) — — — — — — Other non-interest expense Amortization: Prior service cost — — — — — — 14 14 Other non-interest expense Net loss 512 — 28 14 — — — — Other non-interest expense Net periodic (income) benefit cost $ (3,295) $ (3,490) $ 251 $ 241 $ 302 $ 296 $ 279 $ 287 (1) Effective September 30, 2023, the RSI Pension Plan was merged into the Columbia Bank Pension Plan. Net periodic (income) benefit cost for the Pension Plan and Post-retirement Plan for the three months ended March 31, 2024 and 2023, includes the following components: For the Three Months Ended March 31, Pension Plan (1) Post-retirement Plan Affected Line Item in the Consolidated Statements of Income 2024 2023 2024 2023 (In thousands) Service cost $ — $ — $ 13 $ 17 Compensation and employee benefits Interest cost — 76 31 27 Other non-interest expense Expected return on plan assets — (122) — — Other non-interest expense Amortization: Net (gain) — — (5) (15) Other non-interest expense Net periodic (income) benefit cost $ — $ (46) $ 39 $ 29 (1) Effective September 30, 2023, the RSI Pension Plan was merged into the Columbia Bank Pension Plan.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2024
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 March 31, 2024 and December 31, 2023, by level within the fair value hierarchy: 14. Fair Value Measurements (continued) March 31, 2024 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 $ 237,034 $ 229,844 $ 7,190 $ — Mortgage-backed securities and collateralized mortgage obligations 869,217 — 869,217 — Municipal obligations 2,708 — 889 1,819 Corporate debt securities 78,481 — 70,389 8,092 Total debt securities available for sale 1,187,440 229,844 947,685 9,911 Equity securities 4,430 4,107 323 — Derivative assets 25,346 — 25,346 — $ 1,217,216 $ 233,951 $ 973,354 $ 9,911 Derivative liabilities $ 18,142 $ — $ 18,142 $ — December 31, 2023 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 $ 145,501 $ 137,800 $ 7,701 $ — Mortgage-backed securities and collateralized mortgage obligations 867,585 — 867,585 — Municipal obligations 2,702 — 892 1,810 Corporate debt securities 77,769 — 69,842 7,927 Total debt securities available for sale 1,093,557 137,800 946,020 9,737 Equity securities 4,079 3,758 321 Derivative assets 18,898 — 18,898 — $ 1,116,534 $ 141,558 $ 965,239 $ 9,737 Derivative liabilities $ 25,025 $ — $ 25,025 $ —
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	The table below provides activity of assets reported as Level 3 during the three months ended March 31, 2024 and 2023: Significant Unobservable Inputs (Level 3) (In thousands) Debt securities available for sale: Balance of recurring Level 3 assets -December 31, 2023 $ 9,737 Change in fair value of Level 3 assets 174 Balance of recurring Level 3 assets - March 31, 2024 $ 9,911 Significant Unobservable Inputs (Level 3) (In thousands) Debt securities available for sale: Balance of recurring Level 3 assets -December 31, 2022 $ 12,123 Change in fair value of Level 3 assets (1,523) Balance of recurring Level 3 assets - March 31, 2023 $ 10,600
Fair Value Measurements, Nonrecurring	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 March 31, 2024 and December 31, 2023, by level within the fair value hierarchy: March 31, 2024 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 $ 4,860 $ — $ — $ 4,860 Mortgage servicing rights 2,756 — — 2,756 $ 7,616 $ — $ — $ 7,616 December 31, 2023 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 $ 5,000 $ — $ — $ 5,000 Mortgage servicing rights 2,908 — — 2,908 $ 7,908 $ — $ — $ 7,908
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques	The following table presents information for Level 3 assets measured at fair value on a non-recurring basis at March 31, 2024 and December 31, 2023: March 31, 2024 Fair Value Valuation Methodology Unobservable Inputs Range of Inputs Weighted Average Rate (Dollars in thousands) Impaired loans $ 4,860 Other A/R aging schedule — — Mortgage servicing rights $ 2,756 Discounted cash flow Prepayment speeds and discount rates (1) 4.9% - 27.0% 8.9 % December 31, 2023 Fair Value Valuation Methodology Unobservable Inputs Range of Inputs Weighted Average Rate (Dollars in thousands) Impaired loans $ 5,000 Other Contracted modification agreement. — % — % Mortgage servicing rights $ 2,908 Discounted cash flow Prepayment speeds and discount rates (1) 4.3% - 27.2% 8.1 % (1) Value of SBA servicing rights based on a discount rate of 15.50%.
Fair Value, by Balance Sheet Grouping	The following tables present the assets and liabilities reported on the Consolidated Statements of Financial Condition at their fair values at March 31, 2024 and December 31, 2023: 14. Fair Value Measurements (continued) March 31, 2024 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 $ 373,472 $ 373,472 $ 373,472 $ — $ — Debt securities available for sale 1,187,440 1,187,440 229,844 947,685 9,911 Debt securities held to maturity 398,351 351,991 — 351,991 — Equity securities 4,430 4,430 4,107 323 — Federal Home Loan Bank stock 80,859 80,859 — 80,859 — Loans receivable, net 7,760,228 7,229,292 — — 7,229,292 Derivative assets 25,346 25,346 — 25,346 — Financial liabilities: Deposits $ 7,829,403 $ 7,811,709 $ — $ 7,811,709 $ — Borrowings 1,530,424 1,527,514 — 1,527,514 — Derivative liabilities 18,142 18,142 — 18,142 — December 31, 2023 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 $ 423,249 $ 423,249 $ 423,249 $ — $ — Debt securities available for sale 1,093,557 1,093,557 137,800 946,020 9,737 Debt securities held to maturity 401,154 357,177 — 357,177 — Equity securities 4,079 4,079 3,758 321 — Federal Home Loan Bank stock 81,022 81,022 — 81,022 — Loans receivable, net 7,819,441 7,366,184 — — 7,366,184 Derivative assets 18,898 18,898 — 18,898 — Financial liabilities: Deposits $ 7,846,556 $ 7,828,259 $ — $ 7,828,259 $ — Borrowings 1,528,695 1,531,179 — 1,531,179 — Derivative liabilities 25,025 25,025 — 25,025 —

Other Comprehensive Income (L_2

Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Mar. 31, 2024
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 months ended March 31, 2024 and 2023: For the Three Months Ended March 31, 2024 2023 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: $ (6,948) $ 1,956 $ (4,992) $ 17,541 $ (4,472) $ 13,069 Accretion of unrealized gain (loss) on debt securities reclassified as held to maturity 5 (1) 4 (11) 4 (7) Reclassification adjustment for (loss) gain included in net income (1,256) 353 (903) (1,295) 366 (929) (8,199) 2,308 (5,891) 16,235 (4,102) 12,133 Derivatives: Unrealized gain (loss) on swap contracts accounted for as cash flow hedges 5,233 (1,473) 3,760 (1,203) 338 (865) 5,233 (1,473) 3,760 (1,203) 338 (865) Employee benefit plans: Amortization of prior service cost included in net income (14) 4 (10) (14) 4 (10) Reclassification adjustment of actuarial net (loss) gain included in net income (534) 150 (384) 1 — 1 Change in funded status of retirement obligations 589 (166) 423 26 153 179 41 (12) 29 13 157 170 Total other comprehensive income (loss) $ (2,925) $ 823 $ (2,102) $ 15,045 $ (3,607) $ 11,438
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 months ended March 31, 2024 and 2023: For the Three Months Ended March 31, 2024 2023 Unrealized (Losses) on Debt Securities Available for Sale Unrealized Gains (Losses) on Swaps Employee Benefit Plans Accumulated Other Comprehensive (Loss) Unrealized (Losses) on Debt Securities Available for Sale Unrealized Gains (Losses) on Swaps Employee Benefit Plans Accumulated Other Comprehensive (Loss) (In thousands) Balance at beginning of period $ (113,649) $ (414) $ (44,672) $ (158,735) $ (135,482) $ 504 $ (44,318) $ (179,296) Current period changes in other comprehensive income (loss) (5,891) 3,760 29 (2,102) 12,133 (865) 170 11,438 Total other comprehensive income (loss) $ (119,540) $ 3,346 $ (44,643) $ (160,837) $ (123,349) $ (361) $ (44,148) $ (167,858)
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 months ended March 31, 2024 and 2023: Accumulated Other Comprehensive Income (Loss) Components For the Three Months Ended March 31, Affected Line Items in the Consolidated Statements of Income 2024 2023 (In thousands) Reclassification adjustment for loss included in net income $ (1,256) $ (1,295) Loss on securities transactions Reclassification adjustment of actuarial net (loss) gain included in net income $ (534) $ 1 Other non-interest expense Total before tax (1,790) (1,294) Income tax benefit 503 366 Net of tax $ (1,287) $ (928)

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities (Tables)	3 Months Ended
	Mar. 31, 2024
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 March 31, 2024 and December 31, 2023: March 31, 2024 Asset Derivative Liability Derivative Consolidated Statements of Financial Condition Fair Value Consolidated Statements of Financial Condition Fair Value (In thousands) Derivatives: Interest rate products - designated hedges Other Assets $ 9,326 Other Liabilities $ 2,224 Interest rate products - non-designated hedges Other Assets 16,020 Other Liabilities 15,918 Total derivative instruments $ 25,346 $ 18,142 December 31, 2023 Asset Derivative Liability Derivative Consolidated Statements of Financial Condition Fair Value Consolidated Statements of Financial Condition Fair Value (In thousands) Derivatives: Interest rate products - designated hedges Other Assets $ 5,394 Other Liabilities $ 11,530 Interest rate products - non-designated hedges Other Assets 13,504 Other Liabilities 13,495 Total derivative instruments $ 18,898 $ 25,025
Schedule of Derivative Instruments	At March 31, 2024, the following amounts were recorded on the Consolidated Statements of Financial Condition related to cumulative basis adjustment for fair value hedges: Carrying Amount of Hedged Assets/(Liabilities) Cumulative Amount of Fair Value Hedging Adjustment included in the Carrying Amount of Hedged Assets/(Liabilities) Carrying Amount of Hedged Assets/(Liabilities) Cumulative Amount of Fair Value Hedging Adjustment included in the Carrying Amount of Hedged Assets/(Liabilities) At March 31, 2024 At December 31, 2023 (In thousands) Fair value interest rate products $ 698,796 $ (1,204) $ 706,412 $ 6,412

Revenue Recognition (Tables)

Revenue Recognition (Tables)	3 Months Ended
	Mar. 31, 2024
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 months ended March 31, 2024 and 2023. For the Three Months Ended March 31, 2024 2023 (In thousands) Non-interest income In-scope of Topic 606: Demand deposit account fees $ 1,413 $ 1,176 Title insurance fees 503 587 Insurance agency income 48 39 Other non-interest income 1,480 2,483 Total in-scope non-interest income 3,444 4,285 Total out-of-scope non-interest income 4,008 3,788 Total non-interest income $ 7,452 $ 8,073

Acquisitions - Narrative (Detai

Acquisitions - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended
	Dec. 01, 2021	Mar. 31, 2024	Mar. 31, 2023
Business Acquisition [Line Items]
Merger-related expenses		$ 22	$ 0
Freehold Entities
Business Acquisition [Line Items]
Business acquisition, equity interest issued or issuable (in shares)	2,591,007,000
Merger-related expenses		$ 22	$ 0

Earnings per Share (Details)

Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Net (loss) income	$ (1,155)	$ 18,723
Shares:
Weighted average shares outstanding - basic (in shares)	101,746,740	104,631,583
Effect of dilutive common stock equivalents (in shares)	241,685	516,792
Weighted average shares outstanding - diluted (in shares)	101,988,425	105,148,375
Earnings per share:
Earnings per share - basic (in dollars per share)	$ (0.01)	$ 0.18
Earnings per share - diluted (in dollars per share)	$ (0.01)	$ 0.18
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	823,566	348,101

Stock Repurchase Program (Detai

Stock Repurchase Program (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	May 25, 2023	Dec. 14, 2022	Mar. 31, 2024	Mar. 31, 2023
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, number of shares authorized to be repurchased (in shares)	2,000,000	3,000,000
Stock repurchase program, percent of common stock	1.90%	2.70%
Stock repurchase program, remaining number of shares authorized to be repurchased (in shares)			1,005,325
Shares repurchased, number of shares (in shares)			101,516	2,378,434
Shares repurchased, value			$ 1,652	$ 47,323
Share Repurchase Programs
Equity, Class of Treasury Stock [Line Items]
Shares repurchased, number of shares (in shares)			101,516	2,378,434
Shares repurchased, value			$ 1,700	$ 47,300
Shares repurchased, price per share (in dollars per share)			$ 16.28	$ 19.90

Debt Securities Available for_3

Debt Securities Available for Sale - Schedule of Debt Securities, Available-for-Sale (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,353,298	$ 1,251,230
Gross Unrealized Gains	226	946
Gross Unrealized (Losses)	(166,084)	(158,619)
Debt securities available for sale	1,187,440	1,093,557
U.S. government and agency obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	239,128	146,387
Gross Unrealized Gains	225	924
Gross Unrealized (Losses)	(2,319)	(1,810)
Debt securities available for sale	237,034	145,501
Mortgage-backed securities and collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,018,854	1,009,508
Gross Unrealized Gains	1	20
Gross Unrealized (Losses)	(149,638)	(141,943)
Debt securities available for sale	869,217	867,585
Municipal obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,768	2,770
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	(60)	(68)
Debt securities available for sale	2,708	2,702
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	92,548	92,565
Gross Unrealized Gains	0	2
Gross Unrealized (Losses)	(14,067)	(14,798)
Debt securities available for sale	$ 78,481	$ 77,769

Debt Securities Available for_4

Debt Securities Available for Sale - Narrative (Details)	3 Months Ended
	Mar. 31, 2024 USD ($) security	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($) security
Debt Securities, Available-for-sale [Line Items]
Mortgage-backed securities and collateralized mortgage obligations	$ 1,018,854,000
Mortgage-backed securities and collateralized mortgage obligations	869,217,000
Proceeds from sales of debt securities available for sale	3,495,000	$ 42,625,000
Gross gains on sale of available-for-sale securities	0	0
Gross losses on sale of available-for-sale securities	1,300,000	1,300,000
Proceeds from maturities and calls of debt securities, available-for-sale	$ 0	$ 0
Number of matured debt securities available -for-sale | security	1
Proceeds from maturities of debt securities, available-for-sale	$ 10,000,000
Debt securities, available-for-sale, restricted	$ 224,900,000		$ 211,500,000
Number of securities in unrealized loss position | security	349		329
Debt securities available for sale, at fair value	$ 1,187,440,000		$ 1,093,557,000
Accrued interest receivable on debt securities available for sale	4,800,000		3,700,000
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Debt securities available for sale, at fair value	78,481,000		77,769,000
Non-investment grade | Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Debt securities available for sale, at fair value	8,100,000		8,100,000
Subsidiaries
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, restricted	$ 66,000,000		$ 75,100,000

Debt Securities Available for_5

Debt Securities Available for Sale - Expected Maturities of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Amortized Cost
One year or less	$ 65,637
More than one year to five years	200,010
More than five years to ten years	68,797
Available-for-sale debt securities, allocated and single maturity date, total	334,444
Mortgage-backed securities and collateralized mortgage obligations	1,018,854
Amortized Cost	1,353,298	$ 1,251,230
Fair Value
One year or less	65,638
More than one year to five years	196,755
More than five years to ten years	55,830
Available-for-sale debt securities, allocated and single maturity date, total	318,223
Mortgage-backed securities and collateralized mortgage obligations	869,217
Fair Value	$ 1,187,440	$ 1,093,557

Debt Securities Available for_6

Debt Securities Available for Sale - Continuous Unrealized Loss Position of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value
Less Than 12 Months	$ 131,777	$ 54
12 Months or Longer	946,908	962,837
Total	1,078,685	962,891
Gross Unrealized (Losses)
Less Than 12 Months	(569)	(4)
12 Months or Longer	(165,515)	(158,615)
Total	(166,084)	(158,619)
U.S. government and agency obligations
Fair Value
Less Than 12 Months	102,990	0
12 Months or Longer	25,704	21,344
Total	128,694	21,344
Gross Unrealized (Losses)
Less Than 12 Months	(440)	0
12 Months or Longer	(1,879)	(1,810)
Total	(2,319)	(1,810)
Mortgage-backed securities and collateralized mortgage obligations
Fair Value
Less Than 12 Months	28,787	54
12 Months or Longer	840,015	863,026
Total	868,802	863,080
Gross Unrealized (Losses)
Less Than 12 Months	(129)	(4)
12 Months or Longer	(149,509)	(141,939)
Total	(149,638)	(141,943)
Municipal obligations
Fair Value
Less Than 12 Months	0	0
12 Months or Longer	2,708	2,702
Total	2,708	2,702
Gross Unrealized (Losses)
Less Than 12 Months	0	0
12 Months or Longer	(60)	(68)
Total	(60)	(68)
Corporate debt securities
Fair Value
Less Than 12 Months	0	0
12 Months or Longer	78,481	75,765
Total	78,481	75,765
Gross Unrealized (Losses)
Less Than 12 Months	0	0
12 Months or Longer	(14,067)	(14,798)
Total	$ (14,067)	$ (14,798)

Debt Securities Held to Matur_3

Debt Securities Held to Maturity - Schedule of Debt Securities, Held-to-Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 398,351	$ 401,154
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	(46,360)	(43,977)
Allowance for Credit Losses	0	0
Fair Value	351,991	357,177
U.S. government and agency obligations
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	49,871	49,871
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	(6,064)	(5,902)
Allowance for Credit Losses	0	0
Fair Value	43,807	43,969
Mortgage-backed securities and collateralized mortgage obligations
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	348,480	351,283
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	(40,296)	(38,075)
Allowance for Credit Losses	0	0
Fair Value	$ 308,184	$ 313,208

Debt Securities Held to Matur_4

Debt Securities Held to Maturity - Expected Maturities of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Amortized Cost
More than one year to five years	$ 29,875
More than five years to ten years	9,996
More than ten years	10,000
Held-to-maturity debt securities, allocated and single maturity date, total	49,871
Mortgage-backed securities and collateralized mortgage obligations	348,480
Amortized Cost	398,351	$ 401,154
Fair Value
More than one year to five years	27,610
More than five years to ten years	8,483
More than ten years	7,714
Held-to-maturity debt securities, allocated and single maturity date, total	43,807
Mortgage-backed securities and collateralized mortgage obligations	308,184
Debt securities held to maturity	$ 351,991	$ 357,177

Debt Securities Held to Matur_5

Debt Securities Held to Maturity - Narrative (Details)	3 Months Ended
	Mar. 31, 2024 USD ($) security	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($) security
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 398,351,000		$ 401,154,000
Fair Value	351,991,000		357,177,000
Proceeds from sale and maturity of held-to-maturity securities	0	$ 0
Fair value of securities sold under agreements to repurchase	$ 213,000,000		$ 202,900,000
Number of positions | security	111		108
Accrued interest receivable on debt securities held-to-maturity	$ 941,000		$ 997,000
Mortgage-backed securities and collateralized mortgage obligations
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	348,480,000		351,283,000
Fair Value	$ 308,184,000		$ 313,208,000

Debt Securities Held to Matur_6

Debt Securities Held to Maturity - Continuous Unrealized Loss Position on Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value
Less Than 12 Months	$ 0	$ 0
12 Months or Longer	351,990	357,177
Total	351,990	357,177
Gross Unrealized (Losses)
Less Than 12 Months	0	0
12 Months or Longer	(46,360)	(43,977)
Total	(46,360)	(43,977)
U.S. government and agency obligations
Fair Value
Less Than 12 Months	0	0
12 Months or Longer	43,807	43,969
Total	43,807	43,969
Gross Unrealized (Losses)
Less Than 12 Months	0	0
12 Months or Longer	(6,064)	(5,902)
Total	(6,064)	(5,902)
Mortgage-backed securities and collateralized mortgage obligations
Fair Value
Less Than 12 Months	0	0
12 Months or Longer	308,183	313,208
Total	308,183	313,208
Gross Unrealized (Losses)
Less Than 12 Months	0	0
12 Months or Longer	(40,296)	(38,075)
Total	$ (40,296)	$ (38,075)

Equity Securities at Fair Val_2

Equity Securities at Fair Value (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Equity securities	$ 4,430,000		$ 4,079,000
Change in fair value of equity securities	351,000	$ 168,000
Proceeds from sale of equity securities	$ 0	$ 0

Loans Receivable and Allowanc_3

Loans Receivable and Allowance for Credit Losses - Loans Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 7,780,637	$ 7,839,754
Net deferred loan costs, fees and purchased premiums and discounts	34,992	34,783
Loans receivable	7,815,629	7,874,537
Real estate loans | One-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,780,805	2,794,726
Real estate loans | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,429,369	1,409,187
Real estate loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,330,769	2,389,766
Real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	437,566	443,094
Commercial business loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	538,604	533,410
Consumer loans | Home equity loans and advances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	260,923	266,770
Consumer loans | Other consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,601	2,801
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	7,765,692	7,824,665
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 loans	2,778,932	2,792,833
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,429,369	1,409,187
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,318,178	2,377,077
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	437,566	443,094
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	538,260	533,041
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 loans	260,786	266,632
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,601	2,801
Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	14,945	15,089
Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,873	1,893
Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0	0
Financial Asset Acquired with Credit Deterioration | Real estate loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	12,591	12,689
Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	0	0
Financial Asset Acquired with Credit Deterioration | Commercial business loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	344	369
Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	137	138
Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 0	$ 0

Loans Receivable and Allowanc_4

Loans Receivable and Allowance for Credit Losses - Narrative (Details)	3 Months Ended
	Mar. 31, 2024 USD ($) loan	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($) loan	Dec. 31, 2022 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held-for-sale	$ 0		$ 0
Gain on sale of loans held-for-sale	185,000	$ 799,000
Loss on sale of loans held-for-sale	0	8,000
Purchases of loans receivable	0	14,729,000
Financing receivable, excluding accrued interest, before allowance for credit loss	7,815,629,000		7,874,537,000
Carrying value of servicing liability	$ 544,000,000		$ 551,000,000
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	$ 22,900,000		$ 12,600,000
Financing receivable, excluding accrued interest, 90 days or more past due, still accruing			0
Real estate owned	0		0
Accrued interest receivable on loans receivable	33,700,000		32,900,000
Specific allowance for loan losses attributable to impaired loans	359,000		614,000
Impaired loans for which there are no related allowance for loan losses	8,102,000		19,919,000
Off-balance sheet, credit loss, liability	4,654,000	6,442,000	5,484,000	$ 6,970,000
Off-balance sheet, credit loss, liability, credit loss expense (reversal)	(830,000)	(528,000)
Less Than 90 Days
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	$ 16,500,000		$ 1,600,000
Financial receivable, number of loans in nonaccrual status | loan	17		10
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	$ 1,600,000		$ 1,700,000
Freehold 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	2,800,000
RSI Entites | Financial Asset Acquired with Credit Deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	10,500,000		10,600,000
Real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales of loans held-for-sale		9,400,000
Real estate loans | One-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales of loans held-for-sale	$ 236,000	9,800,000
Mortgage loans in process of foreclosure, number of loans | loan	5
Mortgage loans in process of foreclosure, amount	$ 1,400,000
Specific allowance for loan losses attributable to impaired loans	35,000		186,000
Impaired loans for which there are no related allowance for loan losses	1,139,000		1,170,000
Real estate loans | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales of loans held-for-sale	1,300,000	580,000
Real estate loans | Home equity loans and advances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales of loans held-for-sale		$ 15,400,000
Real estate loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Specific allowance for loan losses attributable to impaired loans	226,000		237,000
Impaired loans for which there are no related allowance for loan losses	1,942,000		12,741,000
Commercial business loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sales of loans held-for-sale	2,100,000
Specific allowance for loan losses attributable to impaired loans	98,000		154,000
Impaired loans for which there are no related allowance for loan losses	4,865,000		5,814,000
Commercial business loans | Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	$ 717,000		$ 809,000
Consumer loans | Home equity loans and advances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans in process of foreclosure, number of loans | loan	2		1
Mortgage loans in process of foreclosure, amount	$ 155,000		$ 93,000
Specific allowance for loan losses attributable to impaired loans	0		30,000
Impaired loans for which there are no related allowance for loan losses	$ 110,000		$ 145,000
Consumer loans | Residential Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans in process of foreclosure, number of loans | loan			1,000
Mortgage loans in process of foreclosure, amount			$ 576,000

Loans Receivable and Allowanc_5

Loans Receivable and Allowance for Credit Losses - Aging of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Non-accrual	$ 22,900	$ 12,600
Total loans	7,780,637	7,839,754
Real estate loans | One-to-four family
Financing Receivable, Past Due [Line Items]
Total loans	2,780,805	2,794,726
Real estate loans | Multifamily
Financing Receivable, Past Due [Line Items]
Total loans	1,429,369	1,409,187
Real estate loans | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total loans	2,330,769	2,389,766
Real estate loans | Construction
Financing Receivable, Past Due [Line Items]
Total loans	437,566	443,094
Commercial business loans
Financing Receivable, Past Due [Line Items]
Total loans	538,604	533,410
Consumer loans | Home equity loans and advances
Financing Receivable, Past Due [Line Items]
Total loans	260,923	266,770
Consumer loans | Other consumer loans
Financing Receivable, Past Due [Line Items]
Total loans	2,601	2,801
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Financing Receivable, Past Due [Line Items]
Non-accrual	22,935	12,618
Total loans	7,765,692	7,824,665
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total loans	33,643	37,940
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | 30-59 Days
Financing Receivable, Past Due [Line Items]
Total loans	19,941	15,297
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | 60-89 Days
Financing Receivable, Past Due [Line Items]
Total loans	7,242	11,657
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | 90 Days or More
Financing Receivable, Past Due [Line Items]
Total loans	6,460	10,986
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Current
Financing Receivable, Past Due [Line Items]
Total loans	7,732,049	7,786,725
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	5,287	3,139
Total loans	2,778,932	2,792,833
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 loans	15,484	16,891
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 loans	8,736	11,079
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 loans	3,293	4,254
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 loans	3,455	1,558
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family | Current
Financing Receivable, Past Due [Line Items]
Total loans	2,763,448	2,775,942
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily
Financing Receivable, Past Due [Line Items]
Non-accrual	0	0
Total loans	1,429,369	1,409,187
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total loans	1,111	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily | 30-59 Days
Financing Receivable, Past Due [Line Items]
Total loans	1,111	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily | 60-89 Days
Financing Receivable, Past Due [Line Items]
Total loans	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily | 90 Days or More
Financing Receivable, Past Due [Line Items]
Total loans	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily | Current
Financing Receivable, Past Due [Line Items]
Total loans	1,428,258	1,409,187
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Commercial real estate
Financing Receivable, Past Due [Line Items]
Non-accrual	8,456	2,740
Total loans	2,318,178	2,377,077
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Commercial real estate | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total loans	7,704	6,923
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Commercial real estate | 30-59 Days
Financing Receivable, Past Due [Line Items]
Total loans	5,762	1,711
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Commercial real estate | 60-89 Days
Financing Receivable, Past Due [Line Items]
Total loans	0	2,472
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Commercial real estate | 90 Days or More
Financing Receivable, Past Due [Line Items]
Total loans	1,942	2,740
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Commercial real estate | Current
Financing Receivable, Past Due [Line Items]
Total loans	2,310,474	2,370,154
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 loans	437,566	443,094
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 loans	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction | 30-59 Days
Financing Receivable, Past Due [Line Items]
Total loans	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction | 60-89 Days
Financing Receivable, Past Due [Line Items]
Total 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 loans	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction | Current
Financing Receivable, Past Due [Line Items]
Total loans	437,566	443,094
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans
Financing Receivable, Past Due [Line Items]
Non-accrual	8,990	6,518
Total loans	538,260	533,041
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total loans	8,475	13,162
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans | 30-59 Days
Financing Receivable, Past Due [Line Items]
Total loans	3,650	1,727
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans | 60-89 Days
Financing Receivable, Past Due [Line Items]
Total loans	3,949	4,917
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans | 90 Days or More
Financing Receivable, Past Due [Line Items]
Total loans	876	6,518
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans | Current
Financing Receivable, Past Due [Line Items]
Total loans	529,785	519,879
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	202	221
Total loans	260,786	266,632
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 loans	869	963
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 loans	682	779
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 loans	0	14
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 loans	187	170
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances | Current
Financing Receivable, Past Due [Line Items]
Total loans	259,917	265,669
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 loans	2,601	2,801
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 loans	0	1
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 loans	0	1
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 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 loans	0	0
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans | Current
Financing Receivable, Past Due [Line Items]
Total loans	$ 2,601	$ 2,800

Loans Receivable and Allowanc_6

Loans Receivable and Allowance for Credit Losses - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Allowance for credit losses:
Allowance for credit losses on loans	$ 55,401	$ 55,096	$ 52,873	$ 52,803
Total loans:
Total loans	7,780,637	7,839,754
Real estate loans | One-to-four family
Allowance for credit losses:
Allowance for credit losses on loans	13,840	13,017	12,789	11,802
Total loans:
Total loans	2,780,805	2,794,726
Real estate loans | Multifamily
Allowance for credit losses:
Allowance for credit losses on loans	8,670	8,742	8,145	7,877
Total loans:
Total loans	1,429,369	1,409,187
Real estate loans | Commercial real estate
Allowance for credit losses:
Allowance for credit losses on loans	15,232	15,757	16,257	18,111
Total loans:
Total loans	2,330,769	2,389,766
Real estate loans | Construction
Allowance for credit losses:
Allowance for credit losses on loans	8,068	7,758	6,739	6,425
Total loans:
Total loans	437,566	443,094
Commercial business loans
Allowance for credit losses:
Allowance for credit losses on loans	7,711	7,923	7,320	6,897
Total loans:
Total loans	538,604	533,410
Consumer loans | Home equity loans and advances
Allowance for credit losses:
Allowance for credit losses on loans	1,873	1,892	1,614	1,681
Total loans:
Total loans	260,923	266,770
Consumer loans | Other consumer loans
Allowance for credit losses:
Allowance for credit losses on loans	7	7	$ 9	$ 10
Total loans:
Total loans	2,601	2,801
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Allowance for credit losses:
Individually analyzed loans	359	614
Collectively analyzed loans	54,975	54,309
Total loans:
Individually analyzed loans	20,694	31,956
Collectively analyzed loans	7,744,998	7,792,709
Total loans	7,765,692	7,824,665
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family
Allowance for credit losses:
Individually analyzed loans	35	186
Collectively analyzed loans	13,800	12,827
Total loans:
Individually analyzed loans	1,728	4,063
Collectively analyzed loans	2,777,204	2,788,770
Total loans	2,778,932	2,792,833
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily
Allowance for credit losses:
Individually analyzed loans	0	7
Collectively analyzed loans	8,670	8,735
Total loans:
Individually analyzed loans	46	382
Collectively analyzed loans	1,429,323	1,408,805
Total loans	1,429,369	1,409,187
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Commercial real estate
Allowance for credit losses:
Individually analyzed loans	226	237
Collectively analyzed loans	14,947	15,378
Total loans:
Individually analyzed loans	9,695	15,360
Collectively analyzed loans	2,308,483	2,361,717
Total loans	2,318,178	2,377,077
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction
Allowance for credit losses:
Individually analyzed loans	0	0
Collectively analyzed loans	8,068	7,758
Total loans:
Individually analyzed loans	0	0
Collectively analyzed loans	437,566	443,094
Total loans	437,566	443,094
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial business loans
Allowance for credit losses:
Individually analyzed loans	98	154
Collectively analyzed loans	7,611	7,742
Total loans:
Individually analyzed loans	9,115	11,550
Collectively analyzed loans	529,145	521,491
Total loans	538,260	533,041
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances
Allowance for credit losses:
Individually analyzed loans	0	30
Collectively analyzed loans	1,872	1,862
Total loans:
Individually analyzed loans	110	601
Collectively analyzed loans	260,676	266,031
Total loans	260,786	266,632
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans
Allowance for credit losses:
Individually analyzed loans	0	0
Collectively analyzed loans	7	7
Total loans:
Individually analyzed loans	0	0
Collectively analyzed loans	2,601	2,801
Total loans	2,601	2,801
Financial Asset Acquired with Credit Deterioration
Allowance for credit losses:
Allowance for credit losses on loans	67	173
Total loans:
Total loans	14,945	15,089
Financial Asset Acquired with Credit Deterioration | Real estate loans | One-to-four family
Allowance for credit losses:
Allowance for credit losses on loans	5	4
Total loans:
Total loans	1,873	1,893
Financial Asset Acquired with Credit Deterioration | Real estate loans | Multifamily
Allowance for credit losses:
Allowance for credit losses on loans	0	0
Total loans:
Total loans	0	0
Financial Asset Acquired with Credit Deterioration | Real estate loans | Commercial real estate
Allowance for credit losses:
Allowance for credit losses on loans	59	142
Total loans:
Total loans	12,591	12,689
Financial Asset Acquired with Credit Deterioration | Real estate loans | Construction
Allowance for credit losses:
Allowance for credit losses on loans	0	0
Total loans:
Total loans	0	0
Financial Asset Acquired with Credit Deterioration | Commercial business loans
Allowance for credit losses:
Allowance for credit losses on loans	2	27
Total loans:
Total loans	344	369
Financial Asset Acquired with Credit Deterioration | Consumer loans | Home equity loans and advances
Allowance for credit losses:
Allowance for credit losses on loans	1	0
Total loans:
Total loans	137	138
Financial Asset Acquired with Credit Deterioration | Consumer loans | Other consumer loans
Allowance for credit losses:
Allowance for credit losses on loans	0	0
Total loans:
Total loans	$ 0	$ 0

Loans Receivable and Allowanc_7

Loans Receivable and Allowance for Credit Losses - Loans Modified (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	$ 3,700
% of Total Class of Loans Receivable	0.05%
Extended Marurity, Interest Rate Reduction and Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	$ 0
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	3,700
Commercial business loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	$ 3,700
% of Total Class of Loans Receivable	0.69%
Financing receivable, term extension	15 years
Commercial business loans | Extended Marurity, Interest Rate Reduction and Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	$ 0
Commercial business loans | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	$ 3,700

Loans Receivable and Allowanc_8

Loans Receivable and Allowance for Credit Losses - Loans Modified, Aging Analysis (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	$ 6,687	$ 8,506
Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	1,031	3,352
30-59 Days
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	0	0
60-89 Days
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	0	4,917
90 Days or More
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	0	0
Non-accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	5,656	237
Real estate loans | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	1,031	1,035
Real estate loans | Commercial real estate | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	1,031	1,035
Real estate loans | Commercial real estate | 30-59 Days
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	0	0
Real estate loans | Commercial real estate | 60-89 Days
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	0	0
Real estate loans | Commercial real estate | 90 Days or More
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	0	0
Real estate loans | Commercial real estate | Non-accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	0	0
Real estate loans | Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount		2,317
Real estate loans | Construction | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount		2,317
Real estate loans | Construction | 30-59 Days
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount		0
Real estate loans | Construction | 60-89 Days
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount		0
Real estate loans | Construction | 90 Days or More
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount		0
Real estate loans | Construction | Non-accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount		0
Commercial business loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	5,656	5,154
Commercial business loans | Current
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	0	0
Commercial business loans | 30-59 Days
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	0	0
Commercial business loans | 60-89 Days
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	0	4,917
Commercial business loans | 90 Days or More
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	0	0
Commercial business loans | Non-accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable modified in period, amount	$ 5,656	$ 237

Loans Receivable and Allowanc_9

Loans Receivable and Allowance for Credit Losses - Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 55,096	$ 52,803	$ 52,803
Provision for (reversal of) credit losses	5,278	175
Recoveries	149	176
Charge-offs	(5,122)	(281)
Balance at end of period	55,401	52,873	55,096
Real estate loans | One-to-four family
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	13,017	11,802	11,802
Provision for (reversal of) credit losses	825	1,121
Recoveries	0	0
Charge-offs	(2)	(134)
Balance at end of period	13,840	12,789	13,017
Real estate loans | Multifamily
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	8,742	7,877	7,877
Provision for (reversal of) credit losses	(72)	268
Recoveries	0	0
Charge-offs	0	0
Balance at end of period	8,670	8,145	8,742
Real estate loans | Commercial real estate
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	15,757	18,111	18,111
Provision for (reversal of) credit losses	(525)	(1,768)
Recoveries	0	0
Charge-offs	0	(86)
Balance at end of period	15,232	16,257	15,757
Real estate loans | Construction
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	7,758	6,425	6,425
Provision for (reversal of) credit losses	309	314
Recoveries	1	0
Charge-offs	0	0
Balance at end of period	8,068	6,739	7,758
Commercial business loans
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	7,923	6,897	6,897
Provision for (reversal of) credit losses	4,665	272
Recoveries	143	151
Charge-offs	(5,020)	0
Balance at end of period	7,711	7,320	7,923
Consumer loans | Home equity loans and advances
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	1,892	1,681	1,681
Provision for (reversal of) credit losses	(24)	(61)
Recoveries	5	20
Charge-offs	0	(26)
Balance at end of period	1,873	1,614	1,892
Consumer loans | Other consumer loans
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	7	10	10
Provision for (reversal of) credit losses	100	29
Recoveries	0	5
Charge-offs	(100)	(35)
Balance at end of period	$ 7	$ 9	$ 7

Loans Receivable and Allowan_10

Loans Receivable and Allowance for Credit Losses - Loans Individually Evaluated for Impairment (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Impaired [Line Items]
With no allowance recorded: Recorded investment	$ 8,102	$ 19,919
With no allowance recorded: Unpaid principal balance	9,374	22,862
With a specific allowance recorded: Recorded investment	12,592	12,037
With a specific allowance recorded: Unpaid principal balance	13,250	12,058
Recorded Investment	20,694	31,956
Unpaid Principal Balance	22,624	34,920
Specific Allowance	359	614
Real estate loans | One-to-four family
Financing Receivable, Impaired [Line Items]
With no allowance recorded: Recorded investment	1,139	1,170
With no allowance recorded: Unpaid principal balance	1,423	1,519
With a specific allowance recorded: Recorded investment	589	2,893
With a specific allowance recorded: Unpaid principal balance	589	2,911
Recorded Investment	1,728	4,063
Unpaid Principal Balance	2,012	4,430
Specific Allowance	35	186
Real estate loans | Multifamily
Financing Receivable, Impaired [Line Items]
With no allowance recorded: Recorded investment	46	49
With no allowance recorded: Unpaid principal balance	50	52
With a specific allowance recorded: Recorded investment		333
With a specific allowance recorded: Unpaid principal balance		333
Recorded Investment	46	382
Unpaid Principal Balance	50	385
Specific Allowance	0	7
Real estate loans | Commercial real estate
Financing Receivable, Impaired [Line Items]
With no allowance recorded: Recorded investment	1,942	12,741
With no allowance recorded: Unpaid principal balance	2,908	14,364
With a specific allowance recorded: Recorded investment	7,753	2,619
With a specific allowance recorded: Unpaid principal balance	8,412	2,622
Recorded Investment	9,695	15,360
Unpaid Principal Balance	11,320	16,986
Specific Allowance	226	237
Commercial business loans
Financing Receivable, Impaired [Line Items]
With no allowance recorded: Recorded investment	4,865	5,814
With no allowance recorded: Unpaid principal balance	4,865	6,764
With a specific allowance recorded: Recorded investment	4,250	5,736
With a specific allowance recorded: Unpaid principal balance	4,249	5,736
Recorded Investment	9,115	11,550
Unpaid Principal Balance	9,114	12,500
Specific Allowance	98	154
Consumer loans | Home equity loans and advances
Financing Receivable, Impaired [Line Items]
With no allowance recorded: Recorded investment	110	145
With no allowance recorded: Unpaid principal balance	128	163
With a specific allowance recorded: Recorded investment		456
With a specific allowance recorded: Unpaid principal balance		456
Recorded Investment	110	601
Unpaid Principal Balance	128	619
Specific Allowance	$ 0	$ 30

Loans Receivable and Allowan_11

Loans Receivable and Allowance for Credit Losses - Interest Income on Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 26,327	$ 23,751
Interest Income Recognized	35	257
Real estate loans | One-to-four family
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	2,896	4,459
Interest Income Recognized	13	45
Real estate loans | Multifamily
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	214	448
Interest Income Recognized	1	5
Real estate loans | Commercial real estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	12,528	16,252
Interest Income Recognized	20	151
Commercial business loans
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	10,333	1,904
Interest Income Recognized	0	49
Consumer loans | Home equity loans and advances
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	356	688
Interest Income Recognized	$ 1	$ 7

Loans Receivable and Allowan_12

Loans Receivable and Allowance for Credit Losses - Credit Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Total Loans
Total	$ 7,780,637		$ 7,839,754
Total gross charge-offs
Total	5,122	$ 281
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	64,908		648,608
2023/2022	657,645		1,882,747
2022/2021	1,873,899		1,639,402
2021/2020	1,617,324		649,900
2020/2019	639,609		632,951
Prior	2,520,332		1,981,490
Revolving Loans	325,637		325,009
Revolving Loans to Term Loans	66,338		64,558
Total	7,765,692		7,824,665
Total gross charge-offs
2024/2023	0		0
2023/2022	24		269
2022/2021	52		280
2021/2020	2,374		34
2020/2019	0		2,342
Prior	2,672		569
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	5,122		3,494
Real estate loans | One-to-four family
Total Loans
Total	2,780,805		2,794,726
Total gross charge-offs
Total	2	134
Real estate loans | One-to-four family | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	22,636		156,279
2023/2022	158,274		787,911
2022/2021	786,650		793,843
2021/2020	784,164		272,498
2020/2019	267,500		165,966
Prior	759,708		616,336
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	2,778,932		2,792,833
Total gross charge-offs
2024/2023	0		0
2023/2022	0		208
2022/2021	0		197
2021/2020	0		0
2020/2019	0		29
Prior	2		151
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	2		585
Real estate loans | One-to-four family | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	22,636		156,279
2023/2022	157,523		786,735
2022/2021	785,252		793,074
2021/2020	783,100		272,215
2020/2019	267,209		165,337
Prior	757,084		614,351
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	2,772,804		2,787,991
Real estate loans | One-to-four family | Special mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	0		0
Real estate loans | One-to-four family | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	0		0
2023/2022	751		1,176
2022/2021	1,398		769
2021/2020	1,064		283
2020/2019	291		629
Prior	2,624		1,985
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	6,128		4,842
Real estate loans | Multifamily
Total Loans
Total	1,429,369		1,409,187
Total gross charge-offs
Total	0	0
Real estate loans | Multifamily | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	0		111,612
2023/2022	117,242		317,277
2022/2021	320,866		359,983
2021/2020	365,098		157,294
2020/2019	169,203		202,923
Prior	456,960		260,098
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	1,429,369		1,409,187
Total gross charge-offs
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	0		0
Real estate loans | Multifamily | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	0		111,612
2023/2022	117,242		317,277
2022/2021	320,866		359,983
2021/2020	365,098		157,294
2020/2019	169,203		202,923
Prior	452,444		255,578
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	1,424,853		1,404,667
Real estate loans | Multifamily | Special mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	0		0
Prior	4,516		4,520
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	4,516		4,520
Real estate loans | Multifamily | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	0		0
Real estate loans | Commercial real estate
Total Loans
Total	2,330,769		2,389,766
Total gross charge-offs
Total	0	86
Real estate loans | Commercial real estate | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	13,969		191,030
2023/2022	182,962		427,801
2022/2021	437,355		372,948
2021/2020	363,193		176,504
2020/2019	166,038		237,134
Prior	1,154,661		971,660
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	2,318,178		2,377,077
Total gross charge-offs
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	0		64
Prior	0		86
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	0		150
Real estate loans | Commercial real estate | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	13,969		191,030
2023/2022	182,962		422,058
2022/2021	431,612		371,578
2021/2020	362,730		174,705
2020/2019	164,245		236,263
Prior	1,105,621		930,740
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	2,261,139		2,326,374
Real estate loans | Commercial real estate | Special mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	0		0
2023/2022	0		0
2022/2021	0		465
2021/2020	463		0
2020/2019	0		871
Prior	22,285		24,405
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	22,748		25,741
Real estate loans | Commercial real estate | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	0		0
2023/2022	0		5,743
2022/2021	5,743		905
2021/2020	0		1,799
2020/2019	1,793		0
Prior	26,755		16,515
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	34,291		24,962
Real estate loans | Construction
Total Loans
Total	437,566		443,094
Total gross charge-offs
Total	0	0
Real estate loans | Construction | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	6,343		99,634
2023/2022	119,856		270,397
2022/2021	251,745		65,374
2021/2020	59,622		4,933
2020/2019	0		439
Prior	0		2,317
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	437,566		443,094
Total gross charge-offs
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	0		0
Real estate loans | Construction | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	6,343		99,634
2023/2022	119,856		270,397
2022/2021	251,745		65,374
2021/2020	59,622		4,933
2020/2019	0		439
Prior	0		2,317
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	437,566		443,094
Real estate loans | Construction | Special mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	0		0
Real estate loans | Construction | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	0		0
Commercial business loans
Total Loans
Total	538,604		533,410
Total gross charge-offs
Total	5,020	0
Commercial business loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	16,089		67,656
2023/2022	59,914		58,497
2022/2021	56,860		29,077
2021/2020	27,485		27,297
2020/2019	25,868		16,594
Prior	59,291		46,493
Revolving Loans	292,753		287,427
Revolving Loans to Term Loans	0		0
Total	538,260		533,041
Total gross charge-offs
2024/2023	0		0
2023/2022	0		0
2022/2021	0		31
2021/2020	2,352		34
2020/2019	0		2,249
Prior	2,668		304
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	5,020		2,618
Commercial business loans | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	16,089		67,529
2023/2022	59,522		58,118
2022/2021	56,408		28,989
2021/2020	27,402		27,194
2020/2019	25,746		15,499
Prior	50,048		38,954
Revolving Loans	274,391		272,698
Revolving Loans to Term Loans	0		0
Total	509,606		508,981
Commercial business loans | Special mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	0		127
2023/2022	0		303
2022/2021	0		0
2021/2020	0		97
2020/2019	66		14
Prior	931		1,389
Revolving Loans	1,878		4,587
Revolving Loans to Term Loans	0		0
Total	2,875		6,517
Commercial business loans | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	0		0
2023/2022	392		76
2022/2021	452		88
2021/2020	83		6
2020/2019	56		1,081
Prior	7,914		6,150
Revolving Loans	16,484		10,142
Revolving Loans to Term Loans	0		0
Total	25,381		17,543
Commercial business loans | Doubtful | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	0
2023/2022	0
2022/2021	0
2021/2020	0
2020/2019	0
Prior	398
Revolving Loans	0
Revolving Loans to Term Loans	0
Total	398
Consumer loans | Home equity loans and advances
Total Loans
Total	260,923		266,770
Total gross charge-offs
Total	0	26
Consumer loans | Home equity loans and advances | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	3,939		20,198
2023/2022	19,264		20,713
2022/2021	20,289		18,139
2021/2020	17,744		11,368
2020/2019	10,997		9,877
Prior	89,638		84,518
Revolving Loans	32,577		37,261
Revolving Loans to Term Loans	66,338		64,558
Total	260,786		266,632
Total gross charge-offs
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	0		0
Prior	0		26
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	0		26
Consumer loans | Home equity loans and advances | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	3,939		20,198
2023/2022	19,264		20,713
2022/2021	20,289		18,139
2021/2020	17,744		11,368
2020/2019	10,997		9,877
Prior	89,436		84,261
Revolving Loans	32,577		37,261
Revolving Loans to Term Loans	66,338		64,558
Total	260,584		266,375
Consumer loans | Home equity loans and advances | Special mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	0		0
Consumer loans | Home equity loans and advances | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	0		0
Prior	202		257
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	202		257
Consumer loans | Other consumer loans
Total Loans
Total	2,601		2,801
Total gross charge-offs
Total	100	$ 35
Consumer loans | Other consumer loans | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	1,932		2,199
2023/2022	133		151
2022/2021	134		38
2021/2020	18		6
2020/2019	3		18
Prior	74		68
Revolving Loans	307		321
Revolving Loans to Term Loans	0		0
Total	2,601		2,801
Total gross charge-offs
2024/2023	0		0
2023/2022	24		61
2022/2021	52		52
2021/2020	22		0
2020/2019	0		0
Prior	2		2
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	100		115
Consumer loans | Other consumer loans | Pass | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	1,932		2,199
2023/2022	133		151
2022/2021	134		38
2021/2020	18		6
2020/2019	3		18
Prior	74		68
Revolving Loans	307		321
Revolving Loans to Term Loans	0		0
Total	2,601		2,801
Consumer loans | Other consumer loans | Special mention | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	0		0
Consumer loans | Other consumer loans | Substandard | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Total Loans
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2021/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans	0		0
Revolving Loans to Term Loans	0		0
Total	$ 0		$ 0

Loans Receivable and Allowan_13

Loans Receivable and Allowance for Credit Losses - Allowance for Credit Losses on Off Balance Sheet Exposures (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 5,484	$ 6,970
(Reversal of) provision for credit losses	(830)	(528)
Ending balance	$ 4,654	$ 6,442

Leases - Additional Information

Leases - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Leases [Abstract]
Operating lease, weighted average remaining lease term	5 years 9 months 18 days		5 years 10 months 24 days
Operating lease, weighted average discount rate	2.94%		2.70%
Lease, cost	$ 704	$ 633

Leases - Operating Lease Paymen

Leases - Operating Lease Payment Obligations (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Leases [Abstract]
One year or less	$ 3,314	$ 4,204
After one year to two years	4,037	3,536
After two years to three years	3,576	3,154
After three years to four years	2,694	2,271
After four years to five years	2,227	1,807
Thereafter	3,212	2,974
Total undiscounted cash flows	19,060	17,946
Total undiscounted cash flows	(1,574)	(1,411)
Discount on cash flows	$ 17,486	$ 16,535

Deposits - Schedule of Deposits

Deposits - Schedule of Deposits (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Deposits [Abstract]
Non-interest-bearing demand	$ 1,415,909	$ 1,437,361
Interest-bearing demand	1,929,490	1,966,463
Money market accounts	1,228,098	1,255,528
Savings and club deposits	687,303	700,348
Certificates of deposit	2,568,603	2,486,856
Total deposits	$ 7,829,403	$ 7,846,556

Deposits - Narrative (Details)

Deposits - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Deposits [Abstract]
Aggregate amount of certificates of deposit exceeding threshold amount	$ 1,500,000
Interest expense on deposits	$ 48,418	$ 17,088

Deposits - Schedule of Deposit

Deposits - Schedule of Deposit Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Deposits [Abstract]
One year or less	$ 2,202,994	$ 2,077,863
After one year to two years	287,263	321,271
After two years to three years	50,734	57,836
After three years to four years	11,905	13,427
After four years	15,707	16,459
Total term certificate accounts	$ 2,568,603	$ 2,486,856

Stock Based Compensation - Narr

Stock Based Compensation - Narrative (Details) - USD ($)					3 Months Ended
	Mar. 07, 2024	Mar. 06, 2024	Jun. 20, 2023	May 01, 2023	Mar. 31, 2024	Sep. 30, 2023	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	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)		286,265		286,016	286,265
Grants in period (in dollars per share)		$ 6.13		$ 5.48
Granted (in dollars per share)		$ 16.49		$ 15.94	$ 16.49
Non-vested options outstanding (in shares)					1,265,884
Non-vested options, cost not yet recognized, amount					$ 4,300,000
Exercises in period, aggregate intrinsic value					$ 106,000		$ 19,300
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)	27,162	185,279	24,687	201,887		212,441
Granted (in dollars per share)	$ 16.57	$ 16.49	$ 18.23	$ 15.94		$ 16.50
Number of shares available for grant (in shares)					367,567
Stock based compensation					$ 1,300,000		$ 1,000,000
Non-vested restricted shares outstanding (in shares)					620,547		402,601	435,541	430,954
Non-vested restricted shares outstanding, amount					$ 7,400,000
Period for recognition (in years)					1 year 9 months 18 days
Restricted Stock | Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)					1 year
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
Number of shares available for grant (in shares)					1,427,137
Award vesting period (in years)		3 years		3 years
Stock based compensation					$ 951,000		$ 921,000
Period for recognition (in years)					2 years
Expiration period (in years)		10 years		10 years
Expected term		6 years		6 years
Risk free interest rate		4.12%		3.60%
Expected volatility rate		29.13%		27.07%
Expected dividend rate		0%		0%
Employee Stock Option | Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)		1 year		1 year

Stock Based Compensation - Rest

Stock Based Compensation - Restricted Stock Activity (Details) - Restricted Stock - $ / shares					3 Months Ended
	Mar. 07, 2024	Mar. 06, 2024	Jun. 20, 2023	May 01, 2023	Mar. 31, 2024	Sep. 30, 2023	Mar. 31, 2023
Number of Restricted Shares
Beginning balance (in shares)					435,541		430,954
Granted (in shares)	27,162	185,279	24,687	201,887		212,441
Vested (in shares)					(25,890)		(26,424)
Forfeited (in shares)					(1,545)		(1,929)
Ending balance (in shares)					620,547		402,601
Weighted Average Grant Date Fair Value
Beginning balance (in dollars per share)					$ 16.77		$ 17.31
Granted (in dollars per share)	$ 16.57	$ 16.49	$ 18.23	$ 15.94		$ 16.50
Vested (in dollars per share)					20.14		21.16
Forfeited (in dollars per share)					16.54		21.12
Ending balance (in dollars per share)					$ 16.54		$ 17.10

Stock Based Compensation - Stoc

Stock Based Compensation - Stock Option Activity (Details) - USD ($)			3 Months Ended		12 Months Ended
	Mar. 06, 2024	May 01, 2023	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Number of Stock Options
Beginning balance (in shares)			3,584,069	3,436,869	3,436,869
Granted (in shares)	286,265	286,016	286,265
Exercised (in shares)			(28,051)	(3,618)
Expired (in shares)			(1,412)	(2,117)
Forfeited (in shares)			(5,832)	(8,055)
Ending balance (in shares)			3,835,039	3,423,079	3,584,069	3,436,869
Options exercisable (in shares)			2,569,155	1,880,693
Weighted Average Exercise Price
Beginning balance (in dollars per share)			$ 16.20	$ 16.26	$ 16.26
Granted (in dollars per share)	$ 16.49	$ 15.94	16.49
Exercised (in dollars per share)			15.60	15.60
Expired (in dollars per share)			15.60	15.60
Forfeited (in dollars per share)			17.29	20.03
Ending balance (in dollars per share)			16.22	16.25	$ 16.20	$ 16.26
Options exercisable (in dollars per share)			$ 16.12	$ 15.85
Weighted Average Remaining Contractual Term (in years)
Options outstanding			6 years 2 months 12 days	6 years 8 months 12 days	6 years 1 month 6 days	6 years 10 months 24 days
Options exercisable			5 years 7 months 6 days	6 years 4 months 24 days
Aggregate Intrinsic Value
Options outstanding			$ 5,050,150	$ 7,893,117	$ 11,602,267	$ 18,435,239
Options exercisable			$ 3,590,728	$ 4,711,769

Components of Net Periodic Be_3

Components of Net Periodic Benefit Cost - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Retirement Benefits [Abstract]
Years of employment benefits are based upon	5 years
Defined contribution plan, employer contribution amount	$ 0	$ 0

Components of Net Periodic Be_4

Components of Net Periodic Benefit Cost - Schedule of Net Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 1,212	$ 1,199
Interest cost	3,100	2,790
Expected return on plan assets	(8,119)	(7,479)
Amortization of Prior service cost	0	0
Amortization of Net loss (gain)	512	0
Net periodic (income) benefit cost	(3,295)	(3,490)
Pension Plan | Acquired RSI Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0	0
Interest cost	0	76
Expected return on plan assets	0	(122)
Amortization of Net loss (gain)	0	0
Net periodic (income) benefit cost	0	(46)
RIM Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	61	69
Interest cost	162	158
Expected return on plan assets	0	0
Amortization of Prior service cost	0	0
Amortization of Net loss (gain)	28	14
Net periodic (income) benefit cost	251	241
Post-retirement Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	54	54
Interest cost	248	242
Expected return on plan assets	0	0
Amortization of Prior service cost	0	0
Amortization of Net loss (gain)	0	0
Net periodic (income) benefit cost	302	296
Post-retirement Plan | Acquired RSI Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	13	17
Interest cost	31	27
Expected return on plan assets	0	0
Amortization of Net loss (gain)	(5)	(15)
Net periodic (income) benefit cost	39	29
Split-Dollar Life Insurance
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	57	69
Interest cost	208	204
Expected return on plan assets	0	0
Amortization of Prior service cost	14	14
Amortization of Net loss (gain)	0	0
Net periodic (income) benefit cost	$ 279	$ 287

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale	$ 1,187,440	$ 1,093,557
Equity securities	4,430	4,079
Derivative assets	25,346	18,898
Derivative liabilities	18,142	25,025
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	237,034	145,501
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	869,217	867,585
Municipal obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale	2,708	2,702
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale	78,481	77,769
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	229,844	137,800
Equity securities	4,107	3,758
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	947,685	946,020
Equity securities	323	321
Derivative assets	25,346	18,898
Derivative liabilities	18,142	25,025
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt securities available for sale	9,911	9,737
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	1,187,440	1,093,557
Equity securities	4,430	4,079
Derivative assets	25,346	18,898
Assets	1,217,216	1,116,534
Derivative liabilities	18,142	25,025
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	237,034	145,501
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	869,217	867,585
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	2,708	2,702
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	78,481	77,769
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	229,844	137,800
Equity securities	4,107	3,758
Derivative assets	0	0
Assets	233,951	141,558
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	229,844	137,800
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 | 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	947,685	946,020
Equity securities	323	321
Derivative assets	25,346	18,898
Assets	973,354	965,239
Derivative liabilities	18,142	25,025
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	7,190	7,701
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	869,217	867,585
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	889	892
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	70,389	69,842
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	9,911	9,737
Equity securities	0
Derivative assets	0	0
Assets	9,911	9,737
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	1,819	1,810
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	$ 8,092	$ 7,927

Fair Value Measurements - Ass_2

Fair Value Measurements - Assets Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - Significant Unobservable Inputs (Level 3) - Measured on recurring basis - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Debt securities available for sale:
Beginning balance	$ 9,737	$ 12,123
Change in fair value of Level 3 assets	174	(1,523)
Ending balance	$ 9,911	$ 10,600

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details)	3 Months Ended
	Mar. 31, 2024 security	Dec. 31, 2023 security
Measured on recurring basis | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of assets included in level 3	2	2
Measured on recurring basis | Corporate debt securities | Measurement Input, Market Yield | Significant Unobservable Inputs (Level 3) | Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.1200
Measured on recurring basis | Municipal obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of assets included in level 3	2	2
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%
Minimum | Measured on recurring basis | Municipal obligations | Measurement Input, Market Yield | Significant Unobservable Inputs (Level 3) | Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.0351
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%
Maximum | Measured on recurring basis | Municipal obligations | Measurement Input, Market Yield | Significant Unobservable Inputs (Level 3) | Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.0365
Weighted Average | Measured on recurring basis | Corporate debt securities | Measurement Input, Market Yield | Significant Unobservable Inputs (Level 3) | Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.1200
Weighted Average | Measured on recurring basis | Municipal obligations | Measurement Input, Market Yield | Significant Unobservable Inputs (Level 3) | Discounted cash flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities, available-for-sale, measurement input	0.0358

Fair Value Measurements - Ass_3

Fair Value Measurements - Assets and Liabilities Measured on Non-Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
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	7,229,292	7,366,184
Measured on non-recurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	4,860	5,000
Mortgage servicing rights	2,756	2,908
Assets	7,616	7,908
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	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	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	4,860	5,000
Mortgage servicing rights	2,756	2,908
Assets	$ 7,616	$ 7,908

Fair Value Measurements - Quali

Fair Value Measurements - Qualitative Valuation (Details) $ in Thousands	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Measured on non-recurring basis
Fair Value
Impaired loans	$ 4,860	$ 5,000
Mortgage servicing rights	2,756	2,908
Significant Unobservable Inputs (Level 3)
Fair Value
Impaired loans	7,229,292	7,366,184
Significant Unobservable Inputs (Level 3) | Measured on non-recurring basis
Fair Value
Impaired loans	4,860	5,000
Mortgage servicing rights	$ 2,756	$ 2,908
Significant Unobservable Inputs (Level 3) | Contracted modification agreement | Measured on non-recurring basis | Other
Unobservable Inputs
Impaired loans	0	0
Significant Unobservable Inputs (Level 3) | Contracted modification agreement | Measured on non-recurring basis | Weighted Average | Other
Unobservable Inputs
Impaired loans	0	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	0.049	0.043
Significant Unobservable Inputs (Level 3) | Prepayment speeds and discount rates | Measured on non-recurring basis | Maximum | Discounted cash flow
Unobservable Inputs
Mortgage servicing rights	0.270	0.272
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	0.089	0.081
Significant Unobservable Inputs (Level 3) | Discount rate | Measured on non-recurring basis | Weighted Average | Discounted cash flow
Unobservable Inputs
Mortgage servicing rights	0.1550

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value on Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financial assets:
Debt securities available for sale	$ 1,187,440	$ 1,093,557
Debt securities held to maturity	351,991	357,177
Equity securities	4,430	4,079
Derivative assets	25,346	18,898
Financial liabilities:
Derivative liabilities	18,142	25,025
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	373,472	423,249
Debt securities available for sale	229,844	137,800
Debt securities held to maturity	0	0
Equity securities	4,107	3,758
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	947,685	946,020
Debt securities held to maturity	351,991	357,177
Equity securities	323	321
Federal Home Loan Bank stock	80,859	81,022
Loans receivable, net	0	0
Derivative assets	25,346	18,898
Financial liabilities:
Deposits	7,811,709	7,828,259
Borrowings	1,527,514	1,531,179
Derivative liabilities	18,142	25,025
Significant Unobservable Inputs (Level 3)
Financial assets:
Cash and cash equivalents	0	0
Debt securities available for sale	9,911	9,737
Debt securities held to maturity	0	0
Equity securities	0	0
Federal Home Loan Bank stock	0	0
Loans receivable, net	7,229,292	7,366,184
Derivative assets	0	0
Financial liabilities:
Deposits	0	0
Borrowings	0	0
Derivative liabilities	0	0
Carrying Value
Financial assets:
Cash and cash equivalents	373,472	423,249
Debt securities available for sale	1,187,440	1,093,557
Debt securities held to maturity	398,351	401,154
Equity securities	4,430	4,079
Federal Home Loan Bank stock	80,859	81,022
Loans receivable, net	7,760,228	7,819,441
Derivative assets	25,346	18,898
Financial liabilities:
Deposits	7,829,403	7,846,556
Borrowings	1,530,424	1,528,695
Derivative liabilities	18,142	25,025
Total Fair Value
Financial assets:
Cash and cash equivalents	373,472	423,249
Debt securities available for sale	1,187,440	1,093,557
Debt securities held to maturity	351,991	357,177
Equity securities	4,430	4,079
Federal Home Loan Bank stock	80,859	81,022
Loans receivable, net	7,229,292	7,366,184
Derivative assets	25,346	18,898
Financial liabilities:
Deposits	7,811,709	7,828,259
Borrowings	1,527,514	1,531,179
Derivative liabilities	$ 18,142	$ 25,025

Other Comprehensive Income (L_3

Other Comprehensive Income (Loss) - Tax Effects of Components in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Before Tax
Other comprehensive (loss) income	$ (2,925)	$ 15,045
Tax Effect
Other comprehensive (loss) income	823	(3,607)
After Tax
Total other comprehensive (loss) income	(2,102)	11,438
Unrealized (Losses) on Debt Securities Available for Sale
Before Tax
Other comprehensive income (loss), before reclassifications	(6,948)	17,541
Other comprehensive (loss) income	(8,199)	16,235
Tax Effect
Other comprehensive income (loss), before reclassifications	1,956	(4,472)
Other comprehensive (loss) income	2,308	(4,102)
After Tax
Other comprehensive income (loss), before reclassifications	(4,992)	13,069
Total other comprehensive (loss) income	(5,891)	12,133
Accretion of unrealized gain (loss) on debt securities reclassified as held to maturity
Before Tax
Reclassification from AOCI, current period	5	(11)
Tax Effect
Reclassification from AOCI, current period	(1)	4
After Tax
Reclassification from AOCI, current period	4	(7)
Reclassification adjustment for (loss) gain included in net income
Before Tax
Reclassification from AOCI, current period	(1,256)	(1,295)
Tax Effect
Reclassification from AOCI, current period	353	366
After Tax
Reclassification from AOCI, current period	(903)	(929)
Unrealized Gains (Losses) on Swaps
Before Tax
Other comprehensive income (loss), before reclassifications	5,233	(1,203)
Tax Effect
Other comprehensive income (loss), before reclassifications	(1,473)	338
After Tax
Other comprehensive income (loss), before reclassifications	3,760	(865)
Total other comprehensive (loss) income	3,760	(865)
Employee Benefit Plans
Before Tax
Other comprehensive income (loss), before reclassifications	589	26
Other comprehensive (loss) income	41	13
Tax Effect
Other comprehensive income (loss), before reclassifications	(166)	153
Other comprehensive (loss) income	(12)	157
After Tax
Other comprehensive income (loss), before reclassifications	423	179
Total other comprehensive (loss) income	29	170
Amortization of prior service cost included in net income
Before Tax
Reclassification from AOCI, current period	(14)	(14)
Tax Effect
Reclassification from AOCI, current period	4	4
After Tax
Reclassification from AOCI, current period	(10)	(10)
Reclassification adjustment of actuarial net (loss) gain included in net income
Before Tax
Reclassification from AOCI, current period	(534)	1
Tax Effect
Reclassification from AOCI, current period	150	0
After Tax
Reclassification from AOCI, current period	$ (384)	$ 1

Other Comprehensive Income (L_4

Other Comprehensive Income (Loss) - Changes in Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 1,040,335	$ 1,053,595
Current period changes in other comprehensive income (loss)	(2,102)	11,438
Balance at end of year	1,038,025	1,038,890
Accumulated Other Comprehensive (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(158,735)	(179,296)
Current period changes in other comprehensive income (loss)	(2,102)	11,438
Balance at end of year	(160,837)	(167,858)
Unrealized (Losses) on Debt Securities Available for Sale
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(113,649)	(135,482)
Current period changes in other comprehensive income (loss)	(5,891)	12,133
Balance at end of year	(119,540)	(123,349)
Unrealized Gains (Losses) on Swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(414)	504
Current period changes in other comprehensive income (loss)	3,760	(865)
Balance at end of year	3,346	(361)
Employee Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(44,672)	(44,318)
Current period changes in other comprehensive income (loss)	29	170
Balance at end of year	$ (44,643)	$ (44,148)

Other Comprehensive Income (L_5

Other Comprehensive Income (Loss) - Reclassification out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Loss on securities transactions	$ (1,256)	$ (1,295)
Total before tax	(1,284)	24,861
Income tax benefit	129	(6,138)
Net (loss) income	(1,155)	18,723
Reclassification out of Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total before tax	(1,790)	(1,294)
Income tax benefit	503	366
Net (loss) income	(1,287)	(928)
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Reclassification adjustment for loss included in net income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Loss on securities transactions	(1,256)	(1,295)
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Reclassification adjustment of actuarial net (loss) gain included in net income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other non-interest expense, net	$ (534)	$ 1

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities - Narrative (Details)	3 Months Ended
	Mar. 31, 2024 USD ($) swap	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($) swap
Derivative [Line Items]
Derivative, excluded component, gain (loss), recognized in earnings	$ 36,000	$ 4,000
Accrued interest on derivatives, at fair value	1,600,000		$ 1,200,000
Derivative, net asset, termination value	7,200,000
Derivative, collateral, right to reclaim cash	0
Currency forward contract - non-designated hedge | Not-designated hedge
Derivative [Line Items]
Notional amount of derivative	0		0
Interest Rate Swap
Derivative [Line Items]
Derivative, gain (loss) on derivative, net	93,000	$ (193,000)
Interest Rate Swap | Not-designated hedge
Derivative [Line Items]
Notional amount of derivative	$ 350,000,000		$ 277,800,000
Number of interest rate swaps in place with commercial banking customers | swap	82		80
Interest Rate Swap | Designated as Hedging Instrument
Derivative [Line Items]
Notional amount of derivative	$ 559,600,000		$ 700,000,000
Number of interest rate derivatives held | swap	8
Interest Rate Swap | Designated as Hedging Instrument | Federal Home Loan Bank Advances
Derivative [Line Items]
Notional amount of derivative	$ 413,700,000		$ 380,000,000
Number of interest rate derivatives held | swap	33		30
Interest Rate Swap | Designated as Hedging Instrument | Commercial Loan
Derivative [Line Items]
Notional amount of derivative			$ 100,000,000
Number of interest rate derivatives held | swap			2

Derivatives and Hedging Activ_4

Derivatives and Hedging Activities - Schedule of Derivative Financial Instruments on the Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Derivative assets	$ 25,346	$ 18,898
Derivative liabilities	$ 18,142	$ 25,025
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Accrued expenses and other liabilities	Accrued expenses and other liabilities
Interest rate products - designated hedges | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative assets	$ 9,326	$ 5,394
Derivative liabilities	2,224	11,530
Interest rate products - designated hedges | Not-designated hedge
Derivatives, Fair Value [Line Items]
Derivative assets	16,020	13,504
Derivative liabilities	$ 15,918	$ 13,495

Derivatives and Hedging Activ_5

Derivatives and Hedging Activities - Cumulative Basis Adjustment for Fair Value Hedges (Details) - Derivative Financial Instruments, Assets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Carrying Amount of Hedged Assets/(Liabilities)	$ 698,796	$ 706,412
Cumulative Amount of Fair Value Hedging Adjustment included in the Carrying Amount of Hedged Assets/(Liabilities)	$ (1,204)	$ 6,412

Revenue Recognition (Details)

Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Total out-of-scope non-interest income	$ 4,008	$ 3,788
Total non-interest income	7,452	8,073
Deposit Account, Title Insurance, Insurance Agency and Other Non-Interest Income
Disaggregation of Revenue [Line Items]
Revenue	3,444	4,285
Demand deposit account fees
Disaggregation of Revenue [Line Items]
Revenue	1,413	1,176
Title insurance fees
Disaggregation of Revenue [Line Items]
Revenue	503	587
Insurance agency income
Disaggregation of Revenue [Line Items]
Revenue	48	39
Other non-interest income
Disaggregation of Revenue [Line Items]
Revenue	$ 1,480	$ 2,483