Berkshire Hills Bancorp (BHLB) 10-K 28 Feb 24 2023 FY Annual report Financial data

Cover Page

Cover Page - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2023	Feb. 23, 2024	Jun. 30, 2023
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2023
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-15781
Entity Registrant Name	BERKSHIRE HILLS BANCORP, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	04-3510455
Entity Address, Address Line One	60 State Street
Entity Address, City or Town	Boston
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02109
City Area Code	617
Local Phone Number	641-9206
Title of 12(b) Security	Common stock, par value $0.01 per share
Trading Symbol	BHLB
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 0.9
Entity Common Stock, Shares Outstanding (in shares)		43,624,434
Documents Incorporated by Reference	Portions of the Proxy Statement for the 2024 Annual Meeting of Shareholders are incorporated by reference in Part III of this Form 10-K.
Entity Central Index Key	0001108134
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2023
Auditor Information [Abstract]
Auditor Name	Crowe LLP
Auditor Location	New York, New York
Auditor Firm ID	173

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Assets
Cash and due from banks	$ 148,148	$ 145,342
Short-term investments	1,055,096	540,013
Total cash and cash equivalents	1,203,244	685,355
Trading security	6,142	6,708
Marketable equity securities, at fair value	13,029	12,856
Securities available for sale, at fair value	1,022,285	1,423,200
Securities held to maturity (fair values of $476,228 in 2023 and $507,464 in 2022)	543,351	583,453
Federal Home Loan Bank stock and other restricted securities	22,689	7,219
Total securities	1,607,496	2,033,436
Less: Allowance for credit losses on investment	(68)	(91)
Net Securities	1,607,428	2,033,345
Loans held for sale	2,237	4,311
Total loans	9,039,686	8,335,309
Less: Allowance for credit losses on loans	(105,357)	(96,270)
Net loans	8,934,329	8,239,039
Premises and equipment, net	68,915	85,217
Other intangible assets	19,664	24,483
Cash surrender value of bank-owned life insurance	242,309	238,919
Other assets	341,757	348,935
Total assets	12,430,821	11,662,864
Liabilities
Demand deposits	2,469,164	2,852,127
NOW and other deposits	858,644	1,054,596
Money market deposits	3,565,516	3,723,570
Savings deposits	1,053,810	1,063,269
Time deposits	2,686,250	1,633,707
Total deposits	10,633,384	10,327,269
Short-term debt	260,000	0
Long-term Federal Home Loan Bank advances	125,223	4,445
Subordinated notes	121,363	121,064
Total borrowings	506,586	125,509
Other liabilities	278,630	256,024
Total liabilities	11,418,600	10,708,802
Shareholders’ equity
Common stock ($0.01 par value; 100,000,000 shares authorized and 51,903,190 shares issued and 43,500,872 shares outstanding in 2023; 100,000,000 shares authorized; 51,903,190 shares issued, and 44,361,222 shares outstanding in 2022)	528	528
Additional paid-in capital - common stock	1,423,273	1,424,183
Unearned compensation	(10,109)	(8,598)
Retained (deficit)	(33,136)	(71,428)
Accumulated other comprehensive (loss)	(143,016)	(181,052)
Treasury stock, at cost (8,402,318 shares in 2023 and 7,541,968 shares in 2022)	(225,319)	(209,571)
Total shareholders’ equity	1,012,221	954,062
Total liabilities and shareholders’ equity	12,430,821	11,662,864
Disposal Group, Held-for-sale, Not Discontinued Operations
Assets
Assets held for sale	$ 10,938	$ 3,260

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Securities held to maturity fair value	$ 476,228	$ 507,464
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	51,903,190	51,903,190
Common stock, shares outstanding (in shares)	43,500,872	44,361,222
Treasury stock, shares (in shares)	8,402,318	7,541,968

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Interest and dividend income
Loans	$ 512,535	$ 335,312	$ 282,164
Securities and other	63,764	51,945	46,901
Total interest and dividend income	576,299	387,257	329,065
Interest expense
Deposits	158,913	33,437	27,236
Borrowings and subordinated notes	48,339	9,223	10,663
Total interest expense	207,252	42,660	37,899
Net interest income	369,047	344,597	291,166
Non-interest income
Other	2,045	6,973	6,631
Fair value adjustments on securities	513	(2,037)	(787)
Net recognized (losses)	(25,057)	6	0
Gain on sale of business operations and assets, net	0	0	52,942
Total non-interest income	42,782	68,937	143,248
Total net revenue	411,829	413,534	434,414
Provision expense/(benefit) for credit losses	31,999	11,000	(500)
Non-interest expense
Compensation and benefits	159,281	152,741	150,589
Occupancy and equipment	35,718	37,638	41,782
Technology and communications	41,878	35,586	33,803
Marketing and promotion	5,377	5,103	2,749
Professional services	11,643	12,043	15,860
FDIC premiums and assessments	7,019	3,105	3,759
Other real estate owned and foreclosures	15	36	17
Amortization of intangible assets	4,820	5,134	5,200
Merger, restructuring and conversion related expenses	6,261	8,909	5,781
Other	29,496	28,421	26,353
Total non-interest expense	301,508	288,716	285,893
Income before income taxes	78,322	113,818	149,021
Income tax expense	8,724	21,285	30,357
Net income	$ 69,598	$ 92,533	$ 118,664
Basic earnings per share (in dollars per share)	$ 1.61	$ 2.03	$ 2.41
Diluted earnings per share (in dollars per share)	$ 1.60	$ 2.02	$ 2.39
Weighted average common shares outstanding:
Basic (in shares)	43,288	45,564	49,240
Diluted (in shares)	43,504	45,914	49,554
Total fee income
Non-interest income
Total fee income	$ 65,281	$ 63,995	$ 84,462
Deposit related fees
Non-interest income
Total fee income	34,155	32,026	29,813
Loan related fees
Non-interest income
Total fee income	10,595	9,467	16,427
Gain on SBA loan sales
Non-interest income
Total fee income	10,334	12,494	20,689
Insurance commissions and fees
Non-interest income
Total fee income	0	0	7,003
Wealth management fees
Non-interest income
Total fee income	$ 10,197	$ 10,008	$ 10,530

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME/(LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 69,598	$ 92,533	$ 118,664
Other comprehensive income/(loss), before tax:
Changes in unrealized gains and losses on securities available-for-sale	47,960	(235,081)	(46,794)
Changes in unrealized gains and losses on cash flow hedges	2,402	(6,667)	0
Changes in unrealized gains and losses on pension	316	1,674	993
Total other comprehensive income/(loss), before tax	50,678	(240,074)	(45,801)
Income taxes related to other comprehensive income/(loss):
Changes in unrealized gains and losses on securities available-for-sale	(11,928)	60,922	11,937
Changes in unrealized gains and losses on cash flow hedges	(630)	1,789	0
Changes in unrealized gains and losses on pension	(84)	(446)	(250)
Total income tax (expense)/benefit related to other comprehensive income/(loss)	(12,642)	62,265	11,687
Total other comprehensive (loss)/income	38,036	(177,809)	(34,114)
Total comprehensive income/(loss)	$ 107,634	$ (85,276)	$ 84,550

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock	Additional paid-in capital	Unearned compensation	Retained (deficit) earnings	Retained (deficit) earnings Cumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated other comprehensive (loss) income	Treasury stock
Beginning balance, common stock (in shares) at Dec. 31, 2020			50,833,000
Beginning balance at Dec. 31, 2020	$ 1,187,773		$ 528	$ 1,427,239	$ (6,245)	$ (233,344)		$ 30,871	$ (31,276)
Comprehensive income:
Net income	118,664					118,664
Other net comprehensive (loss)	(34,114)							(34,114)
Total comprehensive income/(loss)	84,550					(118,664)		(34,114)
Cash dividends declared on common shares	(24,553)					(24,553)
Treasury stock purchased (in shares)			(2,500,000)
Treasury stock purchased	(68,712)					0			(68,712)
Forfeited shares (in shares)			(113,000)
Forfeited shares	0			90	2,644				(2,734)
Exercise of stock options (in shares)			20,000
Exercise of stock options	417					(150)			567
Restricted stock grants (in shares)			476,000
Restricted stock grants	0			(3,898)	(9,625)				13,523
Stock-based compensation	4,170				4,170
Other, net (in shares)			(49,000)
Other, net	(1,210)			14		0			(1,224)
Ending balance, common stock (in shares) at Dec. 31, 2021			48,667,000
Ending balance at Dec. 31, 2021	1,182,435		$ 528	1,423,445	(9,056)	(139,383)		(3,243)	(89,856)
Comprehensive income:
Net income	92,533					92,533
Other net comprehensive (loss)	(177,809)							(177,809)
Total comprehensive income/(loss)	$ (85,276)					92,533		(177,809)
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2016-13 [Member]
Cash dividends declared on common shares	$ (24,527)					(24,527)
Treasury stock purchased (in shares)			(4,485,000)
Treasury stock purchased	(124,519)								(124,519)
Forfeited shares (in shares)			(98,000)
Forfeited shares	0			189	2,560	0			(2,749)
Exercise of stock options (in shares)			12,000
Exercise of stock options	270					(51)			321
Restricted stock grants (in shares)			328,000
Restricted stock grants	0			537	(9,440)				8,903
Stock-based compensation	7,338				7,338
Other, net (in shares)			(63,000)
Other, net	$ (1,659)			12					(1,671)
Ending balance, common stock (in shares) at Dec. 31, 2022	44,361,222		44,361,000
Ending balance at Dec. 31, 2022	$ 954,062	$ 401	$ 528	1,424,183	(8,598)	(71,428)	$ 401	(181,052)	(209,571)
Comprehensive income:
Net income	69,598					69,598
Other net comprehensive (loss)	38,036							38,036
Total comprehensive income/(loss)	107,634					69,598		38,036
Cash dividends declared on common shares	(31,707)					(31,707)
Treasury stock purchased (in shares)			(1,135,000)
Treasury stock purchased	(23,844)								(23,844)
Forfeited shares (in shares)			(103,000)
Forfeited shares	0			(184)	2,657				(2,473)
Exercise of stock options (in shares)			0
Exercise of stock options	0					0			0
Restricted stock grants (in shares)			446,000
Restricted stock grants	0			(568)	(11,666)				12,234
Stock-based compensation	7,498				7,498
Other, net (in shares)			(68,000)
Other, net	$ (1,823)			(158)					(1,665)
Ending balance, common stock (in shares) at Dec. 31, 2023	43,500,872		43,501,000
Ending balance at Dec. 31, 2023	$ 1,012,221		$ 528	$ 1,423,273	$ (10,109)	$ (33,136)		$ (143,016)	$ (225,319)

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Stockholders' Equity [Abstract]
Cash dividends declared, common stock (in USD per share)	$ 0.72	$ 0.54	$ 0.48

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net income	$ 69,598	$ 92,533	$ 118,664
Adjustments to reconcile net income to net cash provided by operating activities:
Provision expense/(benefit) for credit losses	31,999	11,000	(500)
Net amortization of securities	1,451	2,886	1,939
Change in unamortized net loan origination costs and premiums	764	3,312	(1,918)
Premises and equipment depreciation and amortization expense	8,445	9,576	11,035
Stock-based compensation expense	7,498	7,338	4,170
Accretion of purchase accounting entries, net	(716)	(1,637)	(6,577)
Amortization of intangible assets	4,820	5,134	5,200
Income from cash surrender value of bank-owned life insurance policies	(5,392)	(5,540)	(5,561)
Securities losses/(gains), net	24,544	2,031	787
(Gain) on SBA loan sales	(10,334)	(12,494)	(20,689)
Net change in loans held-for-sale	2,074	5,168	5,775
Loss on disposition of assets	0	0	2,811
Loss on sale of real estate	0	0	6
Amortization of interest in tax-advantaged projects	8,018	3,508	3,444
Gain on sale of business operations and other assets	0	0	(52,942)
Prepayment penalties on repayment of Federal Home Loan Bank advances	0	0	862
Net change in other	14,387	(12,076)	18,282
Net cash provided by operating activities	157,156	110,739	84,788
Cash flows from investing activities:
Net decrease in trading security	860	818	776
Proceeds from sales of marketable equity securities	0	0	2,880
Purchases of securities available for sale	(44,586)	(478,940)	(804,616)
Proceeds from sales of securities available for sale	267,199	149,994	0
Proceeds from maturities, calls, and prepayments of securities available for sale	201,624	548,423	575,538
Purchases of securities held to maturity	(700)	(807)	(219,470)
Proceeds from maturities, calls, and prepayments of securities held to maturity	39,193	51,961	46,061
Net change in loans	(716,591)	(1,546,518)	1,283,210
Net change in Mid-Atlantic region loans held for sale	0	0	50,914
Proceeds from surrender of bank-owned life insurance	2,002	2,311	2,566
Purchase of Federal Home Loan Bank stock	(494,159)	(124,331)	0
Proceeds from sales of Federal Home Loan Bank stock	478,689	127,912	24,078
Net investment in limited partnership tax credits	(16,172)	(14,537)	(2,878)
Purchase of premises and equipment, net	(1,820)	(1,495)	(1,606)
Proceeds from sales of seasoned commercial loan portfolios	0	24,323	16,417
Proceeds from sales of other real estate owned	0	0	187
Cash outflows from sale of business operations and other assets	0	0	(352,814)
Net cash (used)/provided by investing activities	(284,461)	(1,260,886)	621,243
Cash flows from financing activities:
Net increase in deposits	306,115	258,316	(154,052)
Net change in Mid-Atlantic region deposits held for sale	0	0	20,953
Proceeds from Federal Home Loan Bank advances and other borrowings	10,450,979	51,275	0
Repayments of Federal Home Loan Bank advances and other borrowings	(10,070,200)	(60,196)	(462,059)
Proceeds from issuance of subordinated debt	0	98,032	0
Repayment from calling of subordinated debt	0	(75,000)	0
Purchase of treasury stock	(23,844)	(124,519)	(68,712)
Exercise of stock options	0	270	417
Common and preferred stock cash dividends paid	(31,707)	(24,527)	(24,553)
Settlement of derivative contracts with financial institution counterparties	13,851	84,044	51,907
Net cash provided/(used) by financing activities	645,194	207,695	(636,099)
Net change in cash and cash equivalents	517,889	(942,452)	69,932
Cash and cash equivalents at beginning of year	685,355	1,627,807	1,557,875
Cash and cash equivalents at end of year	1,203,244	685,355	1,627,807
Supplemental cash flow information:
Interest paid on deposits	148,313	32,782	29,606
Interest paid on borrowed funds	46,584	9,043	11,385
Income taxes paid, net	12,307	28,439	14,816
Other net comprehensive income/(loss)	38,036	(177,809)	(34,114)
Premises and equipment reclassified to held-for-sale	8,714	1,380	4,577
Reclassifications of loans to loans held for sale	0	3,369	11,660
Loans held-for-sale reclassified to portfolio loans, net	0	606	0
Premium payable on cash flow hedges	0	2,296	0
Discontinued Operations, Held-for-sale | Mid-Atlantic Branch Sale
Supplemental cash flow information:
Loans held-for-sale reclassified to portfolio loans, net	0	0	29,418
Mid-Atlantic deposits held-for-sale reclassified to deposits, net	0	0	7,197
Retained earnings
Cash flows from operating activities:
Net income	69,598	92,533	118,664
Impact of ASC 326 adoption | Retained earnings
Supplemental cash flow information:
Impact to retained earnings from adoption of ASU 2022-02	$ 401	$ 0	$ 0

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2023
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation and Consolidation The Consolidated Financial Statements (the “financial statements”) of Berkshire Hills Bancorp, Inc. and its subsidiaries (the “Company” or “Berkshire”) have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”). The Company is a Delaware corporation, headquartered in Boston, Massachusetts, and the holding company for Berkshire Bank (the “Bank”), a Massachusetts-chartered trust company headquartered in Pittsfield, Massachusetts. These financial statements include the accounts of the Company, its wholly-owned subsidiaries and the Bank’s consolidated subsidiaries. In consolidation, all significant intercompany accounts and transactions are eliminated. The results of operations of companies or assets acquired are included only from the dates of acquisition. All material wholly-owned and majority-owned subsidiaries are consolidated unless GAAP requires otherwise. The Company has evaluated subsequent events for potential recognition and/or disclosure through the date these financial statements were issued. Reclassification Certain items in prior financial statements have been reclassified to conform to the current presentation. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the financial statements. Actual results could differ from those estimates. Cash and Cash equivalents Cash and cash equivalents include cash, balances due from banks, and short-term investments, all of which had an original maturity within 90 days. Due to the nature of cash and cash equivalents and the near term maturity, the Company estimated that the carrying amount of such instruments approximated fair value. The nature of the Bank’s business requires that it maintain amounts due from banks which at times, may exceed federally insured limits. The Bank has not experienced any losses on such amounts and all amounts are maintained with well-capitalized institutions. Trading Security The Company accounts for a tax advantaged economic development bond originated in 2008 at fair value, in accordance with Financial Accounting Standards Board’s (“FASB”) Accounting Standards Codification (“ASC”) 320. The bond has been designated as a trading account security and is recorded at fair value, with changes in unrealized gains and losses recorded through earnings each period as part of non-interest income. Securities Debt securities that management has the intent and ability to hold to maturity are classified as held to maturity and carried at amortized cost. All other debt securities are classified as available for sale and carried at fair value, with unrealized gains and losses reported as a component of other net comprehensive income. Equity securities are carried at fair value, with changes in fair value reported in net income. Management determines the appropriate classification of securities at the time of purchase. Restricted equity securities, such as stock in the Federal Home Loan Bank of Boston (“FHLBB”) are carried at cost. There are no quoted market prices for the Company’s restricted equity securities. The Bank is a member of the FHLBB, which requires that members maintain an investment in FHLBB stock, which may be redeemed based on certain conditions. The Bank reviews for impairment based on the ultimate recoverability of the cost bases in the FHLBB stock. Purchase premiums and discounts are recognized in interest income using the interest method, without anticipating prepayments, except mortgage-backed securities where prepayments are anticipated, over the terms of the securities. Premiums on callable debt securities are amortized to their earliest call date. Gains and losses on the sale of securities are recorded on the trade date and are determined using the specific identification method. The Company measures expected credit losses on held to maturity debt securities on a collective basis. Accrued interest receivable on held to maturity debt securities is excluded from the estimate of credit losses. The estimate of expected credit losses considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts. The Company evaluates available for sale debt securities in an unrealized loss position by first assessing whether it intends to sell or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through income. For available for sale debt securities that do not meet the aforementioned criteria, the Company evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, the Company considers the extent to which fair value is less than amortized cost, any changes to the rating of security by a rating agency, and adverse conditions specifically 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 expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any impairment that has not been recorded through an allowance for credit losses is recognized in other comprehensive income. Loans Held for Sale Loans originated with the intent to be sold in the secondary market are accounted for under the fair value option. Non-refundable fees and direct loan origination costs related to residential mortgage loans held for sale are recognized in non-interest income or non-interest expense as earned or incurred. Fair value is primarily determined based on quoted prices for similar loans in active markets. Gains and losses on sales of residential mortgage loans (sales proceeds minus carrying value) are recorded in non-interest income. Loans that were previously held for investment that the Company has an active plan to sell are transferred to loans held for sale at the lower of cost or market (fair value). The market price is primarily determined based on quoted prices for similar loans in active markets or agreed upon sales prices. Gains are recorded in non-interest income at sale to the extent that the sale price of the loan exceeds carrying value. Any reduction in the loan’s value, prior to being transferred to loans held for sale, is reflected as a charge-off of the recorded investment in the loan resulting in a new cost basis, with a corresponding reduction in the allowance for credit losses. Further decreases in the fair value of the loan are recognized in non-interest expense. Loans Loans are reported at their amortized cost. Amortized cost is the principal balance outstanding, net of the unamortized balance of any deferred fees or costs and the unamortized balance of any premiums or discounts on loans purchased or acquired through mergers. Interest income is accrued on the unpaid principal balance. Interest income includes net accretion or amortization of deferred fees or costs and of premiums or discounts. Direct loan origination costs, net of any origination fees, in addition to premiums and discounts on loans, are deferred and recognized as an adjustment of the related loan yield using the interest method. Interest on loans, excluding automobile and unsecured consumer loans, is generally not accrued on loans which are ninety days or more past due unless the loan is well-secured and in the process of collection. Past due status is based on contractual terms of the loan. Automobile and unsecured consumer loans generally continue accruing until one hundred and twenty days delinquent, at which time they are charged off. All interest accrued but not collected for loans that are placed on nonaccrual or charged-off is reversed against interest income, except for certain loans designated as well-secured. The interest on nonaccrual loans is accounted for on the cash-basis or cost-recovery method, until qualifying for return to accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. Purchase Credit Deteriorated ("PCD") Loans Loans that the Company acquired in acquisitions include some loans that have experienced more than insignificant credit deterioration since origination. PCD loans are recorded at the amount paid. An allowance for credit losses is determined using the same methodology as other loans held for investment. The initial allowance for credit losses determined on a collective basis is allocated to individual loans. The sum of the loan’s purchase price and allowance for credit losses becomes its initial amortized cost basis. The difference between the initial amortized cost basis and the par value of the loan is a noncredit discount or premium, which is amortized into interest income over the life of the loan. Subsequent changes to the allowance for credit losses are recorded through provision expense. Allowance for Credit Losses on Loans The allowance for credit losses on loans (“ACLL”) is comprised of the allowance for credit losses on loans. The ACLL is a valuation account that is deducted from the loans’ amortized cost basis to present the net amount expected to be collected on the loans. Loans are charged off against the allowance when management believes the uncollectability of a loan balance is confirmed. Accrued interest receivable is excluded from the estimate of credit losses. The level of the ACLL represents management’s estimate of expected credit losses over the expected life of the loans at the balance sheet date. The Company uses a static pool migration analysis method, applying expected historical loss trend and observed economic metrics. The level of the ACLL is based on management’s ongoing review of all relevant information, from internal and external sources, relating to past and current events, utilizing a 7 quarter reasonable and supportable forecast period with a 1 year reversion period. The ACLL reserve is overlaid with qualitative factors based upon: • the existence and growth of concentrations of credit; • the volume and severity of past due financial assets, including nonaccrual assets; • the institutions lending and credit review as well as the experience and ability of relevant management and staff and; • the effect of other external factors such as regulatory, competition, regional market conditions, legal and technological environment and other events such as natural disasters; • the effect of other economic factors such as economic stimulus and customer forbearance programs. The allowance for unfunded commitments is maintained at a level by the Company to be sufficient to absorb expected lifetime losses related to unfunded credit facilities (including unfunded loan commitments and letters of credit).) The Company’s allowance for credit losses on unfunded commitments is recognized as a liability (other liability on the Consolidated Balance Sheets), with adjustments to the reserve recognized in other noninterest expense in the Consolidated Statements of Operations. The ACLL is measured on a collective (pool) basis when similar risk characteristics exist. The Company evaluates its risk characteristics of loans based on regulatory call report code with sub-segmentation based on underlying collateral for certain loan types. Risk characteristics relevant to each portfolio segment are as follows: Construction – Loans in this segment primarily include real estate development loans for which payment is derived from sale of the property or long term financing at completion. Credit risk is affected by cost overruns, time to sell at an adequate price, and market conditions. Commercial real estate multifamily, owner occupied and non-owner – Loans in this segment are primarily owner-occupied or income-producing properties throughout New England and Northeastern New York. The underlying cash flows generated by the properties may be more adversely affected by conditions in the real estate markets or in the general economy, which in turn, will have an effect on the credit quality in this segment. Management monitors the cash flows of these loans. Commercial and industrial loans – Loans in this segment are made to businesses and are generally secured by assets of the business such as accounts receivable, inventory, marketable securities, other liquid collateral, equipment and other business assets. Repayment is expected from the cash flows of the business. Loans in this segment include asset based loans which generally have no scheduled repayment which are closely monitored against formula based collateral advance ratios. A weakened economy, and resultant decreased consumer spending, will have an effect on the credit quality of this segment. Residential real estate – All loans in this segment are collateralized by residential real estate and repayment is dependent on the credit quality of the individual borrower. The overall health of the economy, including unemployment rates and housing prices, will have an effect on the credit quality in this segment. Home equity and other consumer loans – Loans in this segment are primarily home equity lines of credit, automobile loans and other consumer loans. The overall health of the economy, including unemployment rates and housing prices, will have an effect on the credit quality in this segment. Loans that do not share risk characteristics are evaluated on an individual basis and are not also included in the collective evaluation. Estimates of specific allowance may be determined by the present value of anticipated future cash flows or the loan’s observable fair market value, or the fair value of the collateral less costs to sell, if the loan is collateral dependent. However, for collateral dependent loans, the amount of the amortized cost in a loan that exceeds the fair value of the collateral is charged-off against the allowance for credit losses on loans in lieu of an allocation of a specific allowance amount when such an amount has been identified definitively as uncollectible. Bank-Owned Life Insurance Bank-owned life insurance policies are reflected on the Consolidated Balance Sheets at the amount that can be realized under the insurance contract at the balance sheet date which is the cash surrender value. Changes in the net cash surrender value of the policies, as well as insurance proceeds received, are reflected in non-interest income on the Consolidated Statements of Operations and are not subject to income taxes. Foreclosed and Repossessed Assets Other real estate owned is comprised of real estate acquired through foreclosure proceedings or acceptance of a deed in lieu of foreclosure. Repossessed collateral is primarily comprised of taxi medallions. Both other real estate owned and repossessed collateral are held for sale and are initially recorded at the fair value less estimated costs to sell at the date of foreclosure or repossession, establishing a new cost basis. The shortfall, if any, of the loan balance over the fair value of the property or collateral (excluding taxi medallions), less cost to sell, at the time of transfer from loans to other real estate owned or repossessed collateral is charged to the allowance for credit losses on loans. Subsequent to transfer, the asset is carried at lower of cost or fair value less cost to sell and periodically evaluated for impairment. The shortfall, if any, of the loan balance over the fair value of the collateral comprised of taxi medallions at the time of transfer from loans to repossessed collateral is charged to non-interest income. Subsequent impairments in the fair value of other real estate owned and repossessed collateral are charged to expense in the period incurred. Net operating income or expense related to other real estate owned and repossessed collateral is included in operating expenses in the accompanying Consolidated Statements of Income. Because of changing market conditions, there are inherent uncertainties in the assumptions with respect to the estimated fair value of other real estate owned and repossessed collateral. Because of these inherent uncertainties, the amount ultimately realized on other real estate owned and repossessed collateral may differ from the amounts reflected in the financial statements. Capitalized Servicing Rights Capitalized servicing rights are included in “other assets” in the Consolidated Balance Sheets. Servicing assets are initially recognized as separate assets at fair value when rights are acquired through purchase or through sale of financial assets with servicing retained. The Company's servicing rights accounted for under the fair value method are carried on the Consolidated Balance Sheets at fair value with changes in fair value recorded in income in the period in which the change occurs. Changes in the fair value of servicing rights are primarily due to changes in valuation assumptions, such as discount rates and prepayment speeds, and the collection and realization of expected cash flows. The Company’s servicing rights accounted for under the amortization method are initially recorded at fair value. Under that method, capitalized servicing rights are charged to expense in proportion to and over the period of estimated net servicing income. Fair value of the servicing rights is based on a valuation model that calculates the present value of estimated future net servicing income. The valuation model incorporates assumptions that market participants would use in estimating future net servicing income, such as the cost to service, the discount rate, prepayment speeds and default rates and losses. Impairment is recognized through a valuation allowance for an individual tranche, to the extent that fair value is less than the capitalized amount for the tranches. If the Company later determines that all or a portion of the impairment no longer exists for a particular tranche, a reduction of the allowance may be recorded as an increase to income. Premises and Equipment Land is carried at cost. Buildings, improvements, and equipment are carried at cost less accumulated depreciation and amortization computed on the straight-line method over the estimated useful lives of the assets. Leasehold improvements are amortized on the straight-line method over the shorter of the lease term, plus optional terms if certain conditions are met, or the estimated useful life of the asset. Other Intangibles Intangible assets are acquired assets that lack physical substance but can be distinguished from goodwill because of contractual or other legal rights or the asset is capable of being sold or exchanged either on its own or in combination with a related contract, asset or liability. The fair values of these assets are generally determined based on appraisals and are subsequently amortized on a straight-line basis or an accelerated basis over their estimated lives. Management assesses the recoverability of these intangible assets at least annually or whenever events or changes in circumstances indicate that their carrying value may not be recoverable. If the carrying amount exceeds fair value, an impairment charge is recorded to income. Transfers of Financial Assets Transfers of an entire financial asset, group of entire financial assets, or a participating interest in an entire financial asset are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company, (2) the transferee obtains the right to pledge or exchange the transferred assets, and (3) the Company does not maintain effective control over the transferred assets. Income Taxes Deferred income taxes are recognized for the tax consequences of temporary differences by applying enacted statutory tax rates applicable for future years to differences between financial statement and tax bases of existing assets and liabilities. The effect of tax rate changes on deferred taxes is recognized in the income tax provision in the period that includes the enactment date. A tax valuation allowance is established, as needed, to reduce net deferred tax assets to the amount expected to be realized. In the event it becomes more likely than not that some or all of the deferred tax asset allowances will not be needed, the valuation allowance will be adjusted. In the ordinary course of business there is inherent uncertainty in quantifying the Company’s income tax positions. Income tax positions and recorded tax benefits are based upon management’s evaluation of the facts, circumstances, and information available at the reporting date. For those tax positions where it is more likely than not that a tax benefit will be sustained, we have determined the amount of the tax benefit to be recognized by estimating the largest amount of tax benefit that has a greater than 50% likelihood of being realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant information. For those income tax positions where it is more-likely-than-not that a tax benefit will not be sustained, no tax benefit has been recognized in the financial statements. Where applicable, associated interest and penalties have also been recognized. We recognize accrued interest and penalties related to unrecognized tax benefits as a component of income tax expense. Insurance Commissions Commission revenue is recognized as of the effective date of the insurance policy or the date the customer is billed, whichever is later, net of return commissions related to policy cancellations. Policy cancellation is a variable consideration that is not deemed significant and thus, does not impact the amount of revenue recognized. In addition, the Company may receive additional performance commissions based on achieving certain sales and loss experience measures. Such commissions are recognized when determinable, which is generally when such commissions are received or when the Company receives data from the insurance companies that allows the reasonable estimation of these amounts. On September 1, 2021, the Company completed the sale of substantially all of the assets, and the assumption of certain liabilities, of Berkshire Insurance Group, Inc. (“BIG”) to Brown & Brown of Massachusetts, LLC ("Buyer"), a Massachusetts limited liability company. This sale was made pursuant to the Asset Purchase Agreement dated August 24, 2021. The Buyer paid BIG an aggregate purchase price of $41.5 million, minus $1.6 million for executive goodwill purchase price payments paid by the Buyer at the Closing to certain executives of BIG. The Company recorded a $37.2 million pre-tax gain related to this sale in 2021, which is included in gain on sale of business operations and assets Stock-Based Compensation The Company measures and recognizes compensation cost relating to share-based payment transactions based on the grant-date fair value of the equity instruments issued. The fair value of restricted stock is recorded as unearned compensation. The deferred expense is amortized to compensation expense based on one of several permitted attribution methods over the longer of the required service period or performance period. For performance-based restricted stock awards, the Company estimates the degree to which performance conditions will be met to determine the number of shares that will vest and the related compensation expense. Compensation expense is adjusted in the period such estimates change. Income tax benefits and/or tax deficiencies related to stock compensation determined as the difference between compensation cost recognized for financial reporting purposes and the deduction for tax, are recognized in the income statement as income tax expense or benefit in the period in which they occur. Wealth Management Wealth management assets held in a fiduciary or agent capacity are not included in the accompanying Consolidated Balance Sheets because they are not assets of the Company. Wealth management fees is primarily comprised of fees earned from consultative investment management, trust administration, tax return preparation, and financial planning. The Company’s performance obligation is generally satisfied over time and the resulting fees are recognized monthly, based on the daily accrual of the market value of the investment accounts and the applicable fee rate. Derivative Instruments and Hedging Activities The Company enters into interest rate swap agreements as part of the Company’s interest rate risk management strategy for certain assets and liabilities and not for speculative purposes. Based on the Company’s intended use for the interest rate swap at inception, the Company designates the derivative as either an economic hedge of an asset or liability or a hedging instrument subject to the hedge accounting provisions of ASC 815, “Derivatives and Hedging.” Interest rate swaps designated as economic hedges are recorded at fair value within other assets or liabilities. Changes in the fair value of these derivatives are recorded directly through earnings. For interest rate swaps that management intends to apply the hedge accounting provisions of ASC 815, the Company formally documents at inception all relationships between hedging instruments and hedged items, as well as its risk management objectives and strategies for undertaking the various hedges. Additionally, the Company uses dollar offset or regression analysis at the hedge’s inception and for each reporting period thereafter, to assess whether the derivative used in its hedging transaction is expected to be and has been highly effective in offsetting changes in the fair value or cash flows of the hedged item. The Company discontinues hedge accounting when it is determined that a derivative is not expected to be or has ceased to be highly effective as a hedge, and then reflects changes in fair value of the derivative in earnings after termination of the hedge relationship. The Company enters into commitments to lend with borrowers, and forward commitments to sell loans or to-be-announced mortgage-backed bonds to investors to hedge against the inherent interest rate and pricing risk associated with selling loans. The commitments to lend generally terminate once the loan is funded, the lock period expires or the borrower decides not to contract for the loan. The forward commitments generally terminate once the loan is sold, the commitment period expires or the borrower decides not to contract for the loan. These commitments are considered derivatives which are accounted for by recognizing their estimated fair value on the Consolidated Balance Sheets as either a freestanding asset or liability. See Note 14 - Derivative Instruments and Hedging Activities to the financial statements for more information on commitments to lend and forward commitments. Off-Balance Sheet Financial Instruments In the ordinary course of business, the Company enters into off-balance sheet financial instruments, consisting primarily of credit related financial instruments. These financial instruments are recorded in the financial statements when they are funded or related fees are incurred or received. Fair Value Hierarchy The Company groups assets and liabilities that are measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. Level 1 - Valuation is based on quoted prices in active markets for identical assets or liabilities. Valuations are obtained from readily available pricing sources for market transactions involving identical assets or liabilities. Level 2 - Valuation is based on observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 - Valuation is based on unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using unobservable techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation. Employee Benefits The Company maintains an employer sponsored 401(k) plan to which participants may make contributions in the form of salary deferrals and the Company provides matching contributions in accordance with the terms of the plan. Contributions due under the terms of the defined contribution plans are accrued as earned by employees. Due to the Rome Bancorp acquisition in 2011, the Company inherited a noncontributory, qualified, defined benefit pension plan for certain employees who met age and service requirements; as well as other post-retirement benefits, principally health care and group life insurance. The Rome pension plan and postretirement benefits that were acquired in connection with the whole-bank acquisition were frozen prior to the close of the transaction. The pension benefit in the form of a life annuity is based on the employee’s combined years of service, age, and compensation. The Company also has a long-term care post-retirement benefit plan for certain executives where upon disability, associated benefits are funded by insurance policies or paid directly by the Company. In order to measure the expense associated with the Plans, various assumptions are made including the discount rate, expected return on plan assets, anticipated mortality rates, and expected future healthcare costs. The assumptions are based on historical experience as well as current facts and circumstances. The Company uses a December 31 measurement date for its plans. As of the measurement date, plan assets are determined based on fair value, generally representing observable market prices. The projected benefit obligation is primarily determined based on the present value of projected benefit distributions at an assumed discount rate. Net periodic pension benefit costs include interest costs based on an assumed discount rate, the expected return on plan assets based on actuarially derived market-related values, and the amortization of net actuarial losses. Net periodic postretirement benefit costs include service costs, interest costs based on an assumed discount rate, and the amortization of prior service credits and net actuarial gains. Differences between expected and actual results in each year are included in the net actuarial gain or loss amount, which is recognized in other comprehensive income. The net actuarial gain or loss in excess of a 10% corridor is amortized in net periodic benefit cost over the average remaining service period of active participants in the Plans. The prior service credit is amortized over the average remaining service period to full eligibility for participating employees expected to receive benefits. The Company recognizes in its consolidated balance sheets an asset for a plan’s overfunded status or a liability for a plan’s underfunded status. The Company also measures the Plans’ assets and obligations that determine its funded status as of the end of the fiscal year and recognizes those changes in other comprehensive income/(loss), net of tax. Due to the SI Financial acquisition in 2019, the Company inherited a tax-qualified defined benefit pension plan. The plan was frozen effective September 6, 2013. The plan is a single plan under the Internal Revenue Code and, as a result, all of the assets stand behind all of liabilities. Accordingly, contributions made by a participating employer may be used to provide benefits to participants of other participating employers. Operating Segments The Company operates as one consolidated reportable segment. The chief operating decision-maker evaluates conso

CASH AND CASH EQUIVALENTS

CASH AND CASH EQUIVALENTS	12 Months Ended
	Dec. 31, 2023
Cash and Cash Equivalents [Abstract]
CASH AND CASH EQUIVALENTS	CASH AND CASH EQUIVALENTS

TRADING SECURITY

TRADING SECURITY	12 Months Ended
	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
TRADING SECURITY	TRADING SECURITY The Company holds a tax advantaged economic development bond that is being accounted for at fair value. The security had an amortized cost of $6.2 million and $7.1 million and a fair value of $6.1 million and $6.7 million at year-end 2023 and 2022, respectively. Unrealized gains/(losses) recorded through income on this security totaled $0.3 million, ($0.8) million, and ($0.6) million for 2023, 2022, and 2021, respectively. As discussed further in Note 14 - Derivative Instruments and Hedging Activities, the Company has entered into a swap contract to swap-out the fixed rate of the security in exchange for a variable rate. The Company does not purchase securities with the intent of selling them in the near term, and there are no other debt securities in the trading portfolio at year-end 2023 and 2022.

SECURITIES

SECURITIES	12 Months Ended
	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
SECURITIES	SECURITIES The following is a summary of securities available for sale (“AFS”) , held to maturity (“HTM”), and marketable equity securities: (In thousands) Amortized Gross Gross Fair Value Allowance December 31, 2023 Securities available for sale Debt securities: U.S Treasuries $ 7,980 $ 1 $ — $ 7,981 $ — Municipal bonds and obligations 64,788 494 (1,429) 63,853 — Agency collateralized mortgage obligations 426,986 — (79,112) 347,874 — Agency mortgage-backed securities 492,633 2 (75,155) 417,480 — Agency commercial mortgage-backed securities 174,879 — (29,553) 145,326 — Corporate bonds 43,291 34 (4,210) 39,115 — Other bonds and obligations 655 67 (66) 656 — Total securities available for sale 1,211,212 598 (189,525) 1,022,285 — Securities held to maturity Municipal bonds and obligations 251,046 698 (16,987) 234,757 48 Agency collateralized mortgage obligations 112,929 — (18,360) 94,569 — Agency mortgage-backed securities 47,379 — (8,052) 39,327 — Agency commercial mortgage-backed securities 130,169 — (24,368) 105,801 — Tax advantaged economic development bonds 1,540 6 (60) 1,486 20 Other bonds and obligations 288 — — 288 — Total securities held to maturity 543,351 704 (67,827) 476,228 68 Marketable equity securities 15,035 — (2,006) 13,029 — Total $ 1,769,598 $ 1,302 $ (259,358) $ 1,511,542 $ 68 December 31, 2022 Securities available for sale Debt securities: U.S Treasuries $ 11,972 $ 1 $ — $ 11,973 $ — Municipal bonds and obligations 65,943 422 (3,030) 63,335 — Agency collateralized mortgage obligations 631,732 — (99,787) 531,945 — Agency mortgage-backed securities 643,308 1 (96,996) 546,313 — Agency commercial mortgage-backed securities 264,218 — (35,750) 228,468 — Corporate bonds 43,368 80 (2,938) 40,510 — Other bonds and obligations 655 67 (66) 656 — Total securities available for sale 1,661,196 571 (238,567) 1,423,200 — Securities held to maturity Municipal bonds and obligations 266,793 691 (23,704) 243,780 66 Agency collateralized mortgage-backed securities 128,136 — (20,420) 107,716 — Agency mortgage-backed securities 50,958 — (9,240) 41,718 — Agency commercial mortgage-backed securities 135,206 — (23,203) 112,003 — Tax advantaged economic development bonds 2,069 8 (121) 1,956 25 Other bonds and obligations 291 — — 291 — Total securities held to maturity 583,453 699 (76,688) 507,464 91 Marketable equity securities 15,035 — (2,179) 12,856 — Total $ 2,259,684 $ 1,270 $ (317,434) $ 1,943,520 $ 91 ` At year-end 2023 and 2022, accumulated net unrealized (losses) on AFS securities included in accumulated other comprehensive income/(loss) were losses of $188.9 million and $238.0 million, respectively. At year-end 2023, there was no accumulated net unrealized gain on securities reclassified from AFS to HTM included in accumulated other comprehensive income/(loss). At year-end 2022, accumulated net unrealized gains on the securities reclassified from AFS to HTM included in accumulated other comprehensive income/(loss) was $1.1 million. The year-end 2023 and 2022 related income tax benefit of $49.4 million and $61.3 million, respectively, was also included in accumulated other comprehensive (loss). The following table summarizes the activity in the allowance for credit losses for debt securities held to maturity by security type for the years ended December 31, 2023, 2022 and 2021: (In thousands) Municipal bonds and obligations Tax advantaged economic development bonds Total Balance at December 31, 2022 $ 66 $ 25 $ 91 Provision (benefit) for credit losses (18) (5) (23) Balance at December 31, 2023 $ 48 $ 20 $ 68 (In thousands) Municipal bonds and obligations Tax advantaged economic development bonds Total Balance at December 31, 2021 $ 70 $ 35 $ 105 Provision (benefit) for credit losses (4) (10) (14) Balance at December 31, 2022 $ 66 $ 25 $ 91 (In thousands) Municipal bonds and obligations Tax advantaged economic development bonds Total Balance at December 31, 2020 $ 64 $ 40 $ 104 Provision expense/(benefit) for credit losses 6 (5) 1 Balance at December 31, 2021 $ 70 $ 35 $ 105 Credit Quality Information The Company monitors the credit quality of held to maturity securities through credit ratings from various rating agencies. Credit ratings express opinions about the credit quality of a security and are utilized by the Company to make informed decisions. Investment grade securities are rated BBB-/Baa3 or higher and generally considered by the rating agencies and market participants to be of low credit risk. Conversely, securities rated below investment grade are considered to have distinctively higher credit risk than investment grade securities. For securities without credit ratings, the Company utilizes other financial information indicating the financial health of the underlying municipality, agency, or organization. As of December 31, 2023, none of the Company's investment securities were delinquent or in nonaccrual status. The amortized cost and estimated fair value of AFS and HTM securities, segregated by contractual maturity at year-end 2023 are presented below. Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations. Mortgage-backed securities and collateralized mortgage obligations are shown in total, as their maturities are highly variable. Available for sale Held to maturity (In thousands) Amortized Fair Amortized Fair Within 1 year $ 8,290 $ 8,292 $ 410 $ 410 Over 1 year to 5 years 11,205 11,083 1,802 1,797 Over 5 years to 10 years 55,843 51,922 35,956 35,883 Over 10 years 41,376 40,308 214,706 198,441 Total bonds and obligations 116,714 111,605 252,874 236,531 Mortgage-backed securities 1,094,498 910,680 290,477 239,697 Total $ 1,211,212 $ 1,022,285 $ 543,351 $ 476,228 At year-end 2023 and 2022, the Company had pledged securities as collateral for certain municipal deposits and for interest rate swaps with certain counterparties. The total amortized cost and fair values of these pledged securities follows. Additionally, there is a blanket lien on certain securities to collateralize borrowings from the FHLBB and Federal Reserve Bank of Boston, as discussed further in Note 10 - Borrowed Funds. 2023 2022 (In thousands) Amortized Fair Amortized Fair Securities pledged to swap counterparties $ 9,780 $ 9,633 $ 11,972 $ 11,973 Securities pledged for municipal deposits 289,740 250,979 304,741 276,804 Total $ 299,520 $ 260,612 $ 316,713 $ 288,777 Proceeds from the sale of AFS securities totaled $267 million in 2023. Proceeds from the sale of AFS securities totaled $150 million in 2022. During 2021, there were no sales of AFS securities. The (loss)/gain for the sale of AFS securities were reclassified out of accumulated other comprehensive (loss) and into earnings. The components of net recognized gains and losses on the sale of AFS securities and the fair value change of marketable equities are as follows: (In thousands) 2023 2022 2021 Gross recognized gains $ 1,199 $ 72 $ 108 Gross recognized losses (26,083) (2,009) (550) Net recognized (losses) $ (24,884) $ (1,937) $ (442) Debt securities with unrealized losses, segregated by the duration of their continuous unrealized loss positions, are summarized as follows: Less Than Twelve Months Over Twelve Months Total (In thousands) Gross Fair Gross Fair Gross Fair December 31, 2023 Securities available for sale Debt securities: Municipal bonds and obligations $ 76 $ 9,326 $ 1,353 $ 22,739 $ 1,429 $ 32,065 Agency collateralized mortgage obligations — — 79,112 347,874 79,112 347,874 Agency mortgage-backed securities 1 22 75,154 417,151 75,155 417,173 Agency commercial mortgage-back securities — — 29,553 145,326 29,553 145,326 Corporate bonds 457 6,543 3,753 31,690 4,210 38,233 Other bonds and obligations — — 66 295 66 295 Total securities available for sale $ 534 $ 15,891 $ 188,991 $ 965,075 $ 189,525 $ 980,966 Securities held to maturity Municipal bonds and obligations 229 28,895 16,758 92,063 16,987 120,958 Agency collateralized mortgage obligations 1 21 18,359 94,548 18,360 94,569 Agency mortgage-backed securities — — 8,052 39,327 8,052 39,327 Agency commercial mortgage-back securities — — 24,368 105,801 24,368 105,801 Tax advantaged economic development bonds — — 60 922 60 922 Total securities held to maturity 230 28,916 67,597 332,661 67,827 361,577 Total $ 764 $ 44,807 $ 256,588 $ 1,297,736 $ 257,352 $ 1,342,543 December 31, 2022 Securities available for sale Debt securities: Municipal bonds and obligations $ 2,406 $ 36,696 $ 624 $ 2,763 $ 3,030 $ 39,459 Agency collateralized mortgage obligations 23,052 247,509 76,735 284,434 99,787 531,943 Agency mortgage-backed securities 3,124 37,540 93,872 508,683 96,996 546,223 Agency commercial mortgage-backed securities 9,885 96,396 25,865 132,043 35,750 228,439 Corporate bonds 1,709 25,657 1,229 9,929 2,938 35,586 Other bonds and obligations — — 66 295 66 295 Total securities available for sale $ 40,176 $ 443,798 $ 198,391 $ 938,147 $ 238,567 $ 1,381,945 Securities held to maturity Municipal bonds and obligations 5,476 125,494 18,228 38,341 23,704 163,835 Agency collateralized mortgage obligations 2,734 49,539 17,686 58,177 20,420 107,716 Agency mortgage-backed securities 300 2,419 8,940 39,299 9,240 41,718 Agency commercial mortgage-back securities 447 9,713 22,756 102,290 23,203 112,003 Tax advantaged economic development bonds 1 142 120 1,008 121 1,150 Total securities held to maturity 8,958 187,307 67,730 239,115 76,688 426,422 Total $ 49,134 $ 631,105 $ 266,121 $ 1,177,262 $ 315,255 $ 1,808,367 Debt Securities The Company expects to recover its amortized cost basis on all debt securities in its AFS and HTM portfolios. Furthermore, the Company does not intend to sell nor does it anticipate that it will be required to sell any of its securities in an unrealized loss position as of December 31, 2023, prior to this recovery. The Company’s ability and intent to hold these securities until recovery is supported by the Company’s strong capital and liquidity positions. The following summarizes, by investment security type, the basis for the conclusion that the debt securities in an unrealized loss position within the Company’s AFS and HTM portfolios did not maintain other-than-temporary impairment ("OTTI") at year-end 2023: AFS municipal bonds and obligations At year-end 2023, 35 out of 92 securities in the Company’s portfolio of AFS municipal bonds and obligations were in unrealized loss positions. Aggregate unrealized losses represented 4.3% of the amortized cost of securities in unrealized loss positions. The Company continually monitors the municipal bond sector of the market carefully and periodically evaluates the appropriate level of exposure to the market. At this time, the Company feels the bonds in this portfolio carry minimal risk of default and the Company is appropriately compensated for that risk. There were no material underlying credit downgrades during 2023. All securities are performing. AFS collateralized mortgage obligations At year-end 2023, 197 out of 199 securities in the Company’s portfolio of AFS collateralized mortgage obligations were in unrealized loss positions. Aggregate unrealized losses represented 18.5% of the amortized cost of securities in unrealized loss positions. The Federal National Mortgage Association ("FNMA"), Federal Home Loan Mortgage Corporation ("FHLMC"), and Government National Mortgage Association ("GNMA") guarantee the contractual cash flows of all of the Company's collateralized residential mortgage obligations. The securities are investment grade rated and there were no material underlying credit downgrades during 2023. All securities are performing. AFS commercial and residential mortgage-backed securities At year-end 2023, 119 out of 123 securities in the Company’s portfolio of AFS mortgage-backed securities were in unrealized loss positions. Aggregate unrealized losses represented 15.7% of the amortized cost of securities in unrealized loss positions. The FNMA, FHLMC, and GNMA guarantee the contractual cash flows of the Company’s mortgage-backed securities. The securities are investment grade rated and there were no material underlying credit downgrades during 2023. All securities are performing. AFS corporate bonds At year-end 2023, 14 out of 15 securities in the Company’s portfolio of AFS corporate bonds were in unrealized loss positions. The aggregate unrealized loss represents 9.9% of the amortized cost of bonds in unrealized loss positions. The Company reviews the financial strength of these bonds and has concluded that the amortized cost remains supported by the expected future cash flows of these securities. All securities are performing. AFS other bonds and obligations At year-end 2023, 2 out of 3 securities in the Company’s portfolio of other bonds and obligations were in unrealized loss positions. Aggregate unrealized losses represented 18.3% of the amortized cost of securities in unrealized loss positions. The securities are all investment grade rated, and there were no material underlying credit downgrades during 2023. All securities are performing. HTM municipal bonds and obligations At year-end 2023, 96 out of 173 securities in the Company’s portfolio of HTM municipal bonds and obligations were in unrealized loss positions. Aggregate unrealized losses represented 12.3% of the amortized cost of securities in unrealized loss positions. The Company continually monitors the municipal bond sector of the market carefully and periodically evaluates the appropriate level of exposure to the market. At this time, the Company feels the bonds in this portfolio carry minimal risk of default and the Company is appropriately compensated for that risk. There were no material underlying credit downgrades during 2023. All securities are performing. HTM collateralized mortgage obligations At year-end 2023, 12 out of 12 securities in the Company’s portfolio of HTM collateralized mortgage obligations were in an unrealized loss position. Aggregate unrealized losses represented 16.3% of the amortized cost of the security in an unrealized loss position. The FNMA, FHLMC, and GNMA guarantee the contractual cash flows of all of the Company's collateralized residential mortgage obligations. The securities are investment grade rated, and there were no material underlying credit downgrades during 2023. All securities are performing. HTM commercial and residential mortgage-backed securities At year-end 2023, 17 out of 17 securities in the Company’s portfolio of HTM mortgage-backed securities were in unrealized loss positions. Aggregate unrealized losses represented 18.3% of the amortized cost of securities in unrealized loss positions. The FNMA, FHLMC, and GNMA guarantee the contractual cash flows of the Company’s mortgage-backed securities. The securities are investment grade rated and there were no material underlying credit downgrades during 2023. All securities are performing. HTM tax-advantaged economic development bonds At year-end 2023, 1 out of 2 securities in the Company’s portfolio of tax-advantaged economic development bonds was in an unrealized loss position. Aggregate unrealized losses represented 6.1% of the amortized cost of securities in unrealized loss position. The Company believes that more likely than not all the principal outstanding will be collected. All securities are performing.

LOANS AND RELATED ALLOWANCE FOR

LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES	12 Months Ended
	Dec. 31, 2023
Credit Loss [Abstract]
LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES	LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES The following is a summary of total loans by regulatory call report code with sub-segmentation based on underlying collateral for certain loan types: (In thousands) December 31, 2023 December 31, 2022 Construction $ 640,371 $ 319,452 Commercial multifamily 599,145 620,088 Commercial real estate owner occupied 628,646 640,489 Commercial real estate non-owner occupied 2,606,409 2,496,237 Commercial and industrial 1,359,249 1,445,236 Residential real estate 2,760,312 2,312,447 Home equity 224,223 227,450 Consumer other 221,331 273,910 Total loans $ 9,039,686 $ 8,335,309 Allowance for credit losses 105,357 96,270 Net loans $ 8,934,329 $ 8,239,039 As of December 31, 2023 and 2022, outstanding loans originated under the Small Business Administration ("SBA") Paycheck Protection Program ("PPP") totaled $3.0 million and $5.8 million, respectively. These loans are 100% guaranteed by the SBA and the full principal amount of the loan may qualify for forgiveness. These loans are included in commercial and industrial. In 2023, the Company purchased loans aggregating $649 million and sold loans aggregating $255 million. In 2022, the Company purchased loans aggregating $718 million and sold loans aggregating $366 million. In 2021, the Company purchased loans aggregating $211 million and sold loans aggregating $560 million. Net gains on sales of loans were $10.3 million, $12.5 million, and $20.7 million for the years 2023, 2022, and 2021, respectively. Most of the Company’s lending activity occurs within its primary markets in Massachusetts, Southern Vermont, and Northeastern New York. Most of the loan portfolio is secured by real estate, including residential mortgages, commercial mortgages, and home equity loans. Year-end loans to operators of non-residential buildings totaled $2.2 billion, or 24.0%, and $1.9 billion, or 22.7% of total loans in 2023 and 2022, respectively. There were no other concentrations of loans related to any single industry in excess of 10% of total loans at year-end 2023 or 2022. As of December 31, 2023 and December 31, 2022, the Company had no foreclosed residential real estate property. Additionally, residential mortgage loans collateralized by real estate property that are in the process of foreclosure as of December 31, 2023 and December 31, 2022 totaled $3.8 million and $3.0 million, respectively, including sold loans serviced by the Company. At year-end 2023 and 2022, the Company had pledged loans totaling $1.3 billion and $0.8 billion, respectively, to the Federal Reserve Bank of Boston as collateral for certain borrowing arrangements. Also, residential first mortgage loans are subject to a blanket lien for FHLBB advances. See Note 10 - Borrowed Funds. At year-end 2023 and 2022, the Company’s commitments outstanding to related parties totaled $1.5 million and $1.5 million, respectively, and the loans outstanding against these commitments totaled $0.8 million and $0.8 million, respectively. Related parties include directors and executive officers of the Company and its subsidiaries, as well as their respective affiliates in which they have a controlling interest and immediate family members. For the years 2023 and 2022, all related party loans were performing. Risk characteristics relevant to each portfolio segment are as follows: Construction - Loans in this segment primarily include real estate development loans for which payment is derived from sale of the property or long term financing at completion. Credit risk is affected by cost overruns, time to sell at an adequate price, and market conditions. Commercial real estate multifamily, owner occupied and non-owner - Loans in these segments are primarily owner-occupied or income-producing properties throughout New England and Northeastern New York. The underlying cash flows generated by the properties are adversely impacted by a downturn in the economy, which in turn, will have an effect on the credit quality in this segment. Management monitors the cash flows of these loans. Commercial and industrial loans - Loans in this segment are made to businesses and are generally secured by assets of the business such as accounts receivable, inventory, marketable securities, other liquid collateral, equipment and other business assets. Repayment is expected from the cash flows of the business. Loans in this segment include asset based loans which generally have no scheduled repayment and which are closely monitored against formula based collateral advance ratios. A weakened economy, and resultant decreased consumer spending, will have an effect on the credit quality in this segment. Residential real estate - All loans in this segment are collateralized by residential real estate and repayment is dependent on the credit quality of the individual borrower. The overall health of the economy, including unemployment rates and housing prices, will have an effect on the credit quality in this segment. Home equity and other consumer loans - Loans in this segment are primarily home equity lines of credit, automobile loans and other consumer loans. The overall health of the economy, including unemployment rates and housing prices, will have an effect on the credit quality in this segment. Allowance for Credit Losses on Loans The Allowance for Credit Losses on Loans (“ACLL”) is comprised of the allowance for credit losses on loans, and the allowance for unfunded commitments is accounted for as a separate liability in other liabilities on the Consolidated Balance Sheets. The level of the ACLL represents management’s estimate of expected credit losses over the expected life of the loans at the balance sheet date. The Company uses a static pool migration analysis method, applying expected historical loss trend and observed economic metrics. The level of the ACLL is based on management’s ongoing review of all relevant information, from internal and external sources, relating to past and current events, utilizing a 7 quarter reasonable and supportable forecast period with a 1 year reversion period. The ACLL reserve is overlaid with qualitative factors based upon: • the existence and growth of concentrations of credit; • the volume and severity of past due financial assets, including nonaccrual assets; • the institutions lending and credit review as well as the experience and ability of relevant management and staff and; • the effect of other external factors such as regulatory, competition, regional market conditions, legal and technological environment and other events such as natural disasters; • the effect of other economic factors such as economic stimulus and customer forbearance programs (when applicable). The allowance for unfunded commitments is maintained at a level by the Company to be sufficient to absorb expected lifetime losses related to unfunded credit facilities (including unfunded loan commitments and letters of credit) and is included in other liabilities on the consolidated balance sheets. The Company’s activity in the allowance for credit losses on loans for the years ended December 31, 2023, December 31, 2022 and December 31, 2021 was as follows: (In thousands) Balance at Beginning of Period Adoption of Charge-offs Recoveries Provision for Credit Losses Balance at End of Period Year ended December 31, 2023 Construction $ 1,227 $ — $ (1) $ — $ 1,659 $ 2,885 Commercial multifamily 1,810 — — 6 659 2,475 Commercial real estate owner occupied 10,739 24 (489) 1,139 (1,970) 9,443 Commercial real estate non-owner occupied 30,724 — (65) 204 7,358 38,221 Commercial and industrial 18,743 (23) (17,872) 2,659 15,095 18,602 Residential real estate 18,666 2 (313) 610 657 19,622 Home equity 2,173 — (88) 519 (589) 2,015 Consumer other 12,188 (404) (10,429) 1,586 9,153 12,094 Total allowance for credit losses $ 96,270 $ (401) $ (29,257) $ 6,723 $ 32,022 $ 105,357 (In thousands) Balance at Beginning of Period Charge-offs Recoveries Provision for Credit Losses Balance at End of Period Year ended December 31, 2022 Construction $ 3,206 $ — $ — $ (1,979) $ 1,227 Commercial multifamily 6,120 (94) 112 (4,328) 1,810 Commercial real estate owner occupied 12,752 (687) 702 (2,028) 10,739 Commercial real estate non-owner occupied 32,106 (5,894) 1,549 2,963 30,724 Commercial and industrial 22,584 (18,447) 3,050 11,556 18,743 Residential real estate 22,406 (555) 1,019 (4,204) 18,666 Home equity 4,006 (166) 283 (1,950) 2,173 Consumer other 2,914 (2,215) 505 10,984 12,188 Total allowance for credit losses $ 106,094 $ (28,058) $ 7,220 $ 11,014 $ 96,270 (In thousands) Balance at Beginning of Period Charge-offs Recoveries Provision for Credit Losses Balance at End of Period Year ended December 31, 2021 Construction $ 5,111 $ — $ — $ (1,905) $ 3,206 Commercial multifamily 5,916 (404) 157 451 $ 6,120 Commercial real estate owner occupied 12,380 (1,640) 204 1,808 $ 12,752 Commercial real estate non-owner occupied 35,850 (14,557) 2,522 8,291 $ 32,106 Commercial and industrial 25,013 (10,841) 4,565 3,847 $ 22,584 Residential real estate 28,491 (1,664) 1,767 (6,188) $ 22,406 Home equity 6,482 (334) 335 (2,477) $ 4,006 Consumer other 8,059 (1,578) 761 (4,328) 2,914 Total allowance for credit losses $ 127,302 $ (31,018) $ 10,311 $ (501) $ 106,094 The Company’s allowance for credit losses on unfunded commitments is recognized as a liability (other liability on the Consolidated Balance Sheets), with adjustments to the reserve recognized in other noninterest expense in the Consolidated Statements of Income. The Company’s activity in the allowance for credit losses on unfunded commitments for the years ended December 31, 2023, December 31, 2022, and December 31, 2021 was as follows: (In thousands) Total Balance at December 31, 2022 $ 8,588 Expense for credit losses 668 Balance at December 31, 2023 $ 9,256 (In thousands) Total Balance at December 31, 2021 $ 7,043 Release of expense for credit losses 1,545 Balance at December 31, 2022 $ 8,588 (In thousands) Total Balance at December 31, 2020 $ 7,629 Release of expense for credit losses (586) Balance at December 31, 2021 $ 7,043 Credit Quality Information The Company monitors the credit quality of its portfolio by using internal risk ratings that are based on regulatory guidance. Loans that are given a Pass rating are not considered a problem credit. Loans that are classified as Special Mention loans are considered to have potential weaknesses and are evaluated closely by management. Substandard, including nonaccruing loans, are loans for which a definitive weakness has been identified and which may make full collection of contractual cash flows questionable. Doubtful loans are those with identified weaknesses that make full collection of contractual cash flows, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. For commercial credits, the Company assigns an internal risk rating at origination and reviews the rating annually, semiannually, or quarterly depending on the risk rating. The rating is also reassessed at any point in time when management becomes aware of information that may affect the borrower’s ability to fulfill their obligations. The Company risk rates its residential mortgages, including 1-4 family and residential construction loans, based on a three rating system: Pass, Special Mention, and Substandard. Loans that are current within 59 days are rated Pass. Residential mortgages that are 60-89 days delinquent are rated Special Mention. Loans delinquent for 90 days or greater are rated Substandard and generally placed on nonaccrual status. The following table presents the Company’s loans by risk category: Term Loans Amortized Cost Basis by Origination Year (In thousands) 2023 2022 2021 2020 2019 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total As of December 31, 2023 Construction Current period gross write-offs $ — $ — $ — $ — $ — $ 1 $ — $ — $ 1 Risk rating Pass $ 104,507 $ 346,419 $ 138,802 $ 29,176 $ 2,545 $ 1,098 $ — $ — $ 622,547 Special Mention — — 512 — — — — — 512 Substandard — — 17,312 — — — — — 17,312 Total $ 104,507 $ 346,419 $ 156,626 $ 29,176 $ 2,545 $ 1,098 $ — $ — $ 640,371 Commercial multifamily: Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Risk rating Pass $ 16,020 $ 216,477 $ 56,817 $ 26,566 $ 94,733 $ 179,923 $ 377 $ — $ 590,913 Special Mention — — — — — — — — — Substandard — — 242 2,554 — 5,436 — — 8,232 Total $ 16,020 $ 216,477 $ 57,059 $ 29,120 $ 94,733 $ 185,359 $ 377 $ — $ 599,145 Commercial real estate owner occupied: Current period gross write-offs $ — $ — $ — $ 380 $ — $ 109 $ — $ — $ 489 Risk rating Pass $ 97,271 $ 120,327 $ 122,151 $ 37,914 $ 70,393 $ 165,224 $ 2,653 $ — $ 615,933 Special Mention — — 424 222 — 788 — — 1,434 Substandard — — 81 47 4,703 6,448 — — 11,279 Total $ 97,271 $ 120,327 $ 122,656 $ 38,183 $ 75,096 $ 172,460 $ 2,653 $ — $ 628,646 Commercial real estate non-owner occupied: Current period gross write-offs $ — $ — $ — $ — $ — $ 65 $ — $ — $ 65 Risk rating Pass $ 404,687 $ 591,897 $ 385,247 $ 135,134 $ 277,870 $ 736,566 $ 4,553 $ — $ 2,535,954 Special Mention — — — 229 19,465 726 — — 20,420 Substandard — — — 6,814 13,483 29,738 — — 50,035 Total $ 404,687 $ 591,897 $ 385,247 $ 142,177 $ 310,818 $ 767,030 $ 4,553 $ — $ 2,606,409 Commercial and industrial: Current period gross write-offs $ — $ 1,154 $ 863 $ 2,763 $ 1,496 $ 9,283 $ 2,313 $ — $ 17,872 Risk rating Pass $ 142,946 $ 203,126 $ 118,191 $ 69,722 $ 39,437 $ 112,770 $ 554,153 $ — $ 1,240,345 Special Mention 526 23,149 3,735 1,621 610 1,353 35,244 — 66,238 Substandard 432 761 11,702 1,135 3,785 12,538 22,313 — 52,666 Total $ 143,904 $ 227,036 $ 133,628 $ 72,478 $ 43,832 $ 126,661 $ 611,710 $ — $ 1,359,249 Term Loans Amortized Cost Basis by Origination Year (In thousands) 2023 2022 2021 2020 2019 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total Residential real estate Current period gross write-offs $ — $ 50 $ — $ 50 $ 174 $ 39 $ — $ — $ 313 Risk rating Pass $ 599,124 $ 973,031 $ 266,055 $ 88,302 $ 66,837 $ 755,372 $ 81 $ — $ 2,748,802 Special Mention — — — — 140 664 — — 804 Substandard — 129 1,176 379 574 8,448 — — 10,706 Total $ 599,124 $ 973,160 $ 267,231 $ 88,681 $ 67,551 $ 764,484 $ 81 $ — $ 2,760,312 Term Loans Amortized Cost Basis by Origination Year (In thousands) 2022 2021 2020 2019 2018 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total As of December 31, 2022 Construction Risk rating Pass $ 153,393 $ 133,708 $ 25,634 $ 3,432 $ 1,361 $ 1,924 $ — $ — $ 319,452 Special Mention — — — — — — — — — Substandard — — — — — — — — — Total $ 153,393 $ 133,708 $ 25,634 $ 3,432 $ 1,361 $ 1,924 $ — $ — $ 319,452 Commercial multifamily: Risk rating Pass $ 205,124 $ 61,032 $ 27,583 $ 100,696 $ 67,675 $ 149,633 $ 205 $ — $ 611,948 Special Mention — — 2,628 — — — — — 2,628 Substandard — — — — 5,512 — — — 5,512 Total $ 205,124 $ 61,032 $ 30,211 $ 100,696 $ 73,187 $ 149,633 $ 205 $ — $ 620,088 Commercial real estate owner occupied: Risk rating Pass $ 131,096 $ 127,270 $ 58,835 $ 82,576 $ 75,322 $ 154,056 $ 3,464 $ — $ 632,619 Special Mention — — 387 — — — — — 387 Substandard 1,003 122 31 282 1,056 4,989 — — 7,483 Total $ 132,099 $ 127,392 $ 59,253 $ 82,858 $ 76,378 $ 159,045 $ 3,464 $ — $ 640,489 Commercial real estate non-owner occupied: Risk rating Pass $ 621,685 $ 410,359 $ 175,456 $ 333,783 $ 313,124 $ 530,322 $ 17,846 $ — $ 2,402,575 Special Mention — — — — 20,000 18,462 — — 38,462 Substandard — — 7,237 13,623 15,610 18,730 — — 55,200 Total $ 621,685 $ 410,359 $ 182,693 $ 347,406 $ 348,734 $ 567,514 $ 17,846 $ — $ 2,496,237 Commercial and industrial: Risk rating Pass $ 282,781 $ 147,070 $ 56,880 $ 67,975 $ 83,223 $ 99,367 $ 648,956 $ — $ 1,386,252 Special Mention — 5,811 1,290 1,332 11,502 912 2,632 — 23,479 Substandard 204 496 3,640 8,139 1,981 2,799 10,581 — 27,840 Doubtful — — — — — 56 7,609 — 7,665 Total $ 282,985 $ 153,377 $ 61,810 $ 77,446 $ 96,706 $ 103,134 $ 669,778 $ — $ 1,445,236 Residential real estate Risk rating Pass $ 997,981 $ 280,308 $ 96,548 $ 70,845 $ 138,894 $ 713,744 $ 165 $ — $ 2,298,485 Special Mention — 364 — 861 202 707 — — 2,134 Substandard — 284 448 267 1,857 8,972 — — 11,828 Total $ 997,981 $ 280,956 $ 96,996 $ 71,973 $ 140,953 $ 723,423 $ 165 $ — $ 2,312,447 For home equity and consumer other loan portfolio segments, Berkshire evaluates credit quality based on the aging status of the loan and by payment activity. The performing or nonperforming status is updated on an ongoing basis dependent upon improvement and deterioration in credit quality. The following table presents the amortized cost based on payment activity: Term Loans Amortized Cost Basis by Origination Year (In thousands) 2023 2022 2021 2020 2019 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total As of December 31, 2023 Home equity: Current period gross write-offs $ — $ — $ — $ 70 $ — $ — $ 18 $ — $ 88 Payment performance Performing $ — $ — $ — $ 439 $ — $ 2,614 $ 220,209 $ — $ 223,262 Nonperforming — — — — — — 961 — 961 Total $ — $ — $ — $ 439 $ — $ 2,614 $ 221,170 $ — $ 224,223 Consumer other: Current period gross write-offs $ 109 $ 8,843 $ 1,149 $ 11 $ 78 $ 239 $ — $ — $ 10,429 Payment performance Performing $ 49,588 $ 108,284 $ 19,679 $ 5,843 $ 7,054 $ 19,587 $ 10,614 $ — $ 220,649 Nonperforming 77 104 47 26 110 284 34 — 682 Total $ 49,665 $ 108,388 $ 19,726 $ 5,869 $ 7,164 $ 19,871 $ 10,648 $ — $ 221,331 Term Loans Amortized Cost Basis by Origination Year (In thousands) 2022 2021 2020 2019 2018 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total As of December 31, 2022 Home equity: Payment performance Performing $ — $ 114 $ 454 $ — $ — $ 17 $ 224,746 $ — $ 225,331 Nonperforming — — — — — — 2,119 — 2,119 Total $ — $ 114 $ 454 $ — $ — $ 17 $ 226,865 $ — $ 227,450 Consumer other: Payment performance Performing $ 161,157 $ 28,279 $ 8,312 $ 12,670 $ 27,608 $ 24,682 $ 9,070 $ — $ 271,778 Nonperforming 588 137 44 280 477 567 39 — 2,132 Total $ 161,745 $ 28,416 $ 8,356 $ 12,950 $ 28,085 $ 25,249 $ 9,109 $ — $ 273,910 The following table summarizes information about total loans rated Special Mention or lower at December 31, 2023 and December 31, 2022. The table below includes consumer loans that are Special Mention and Substandard accruing that are classified as performing based on payment activity. (In thousands) December 31, 2023 December 31, 2022 Nonaccrual $ 21,407 $ 31,114 Substandard Accruing 131,689 88,665 Total Classified 153,096 119,779 Special Mention 91,502 68,127 Total Criticized $ 244,598 $ 187,906 The following is a summary of loans by past due status at December 31, 2023 and December 31, 2022: (In thousands) 30-59 Days Past Due 60-89 Days Past Due 90 Days or Greater Past Due Total Past Due Current Total Loans December 31, 2023 Construction $ — $ — $ — $ — $ 640,371 $ 640,371 Commercial multifamily 5,436 187 — 5,623 593,522 599,145 Commercial real estate owner occupied 581 286 804 1,671 626,975 628,646 Commercial real estate non-owner occupied 139 251 3,798 4,188 2,602,221 2,606,409 Commercial and industrial 2,749 689 8,769 12,207 1,347,042 1,359,249 Residential real estate 5,669 943 10,687 17,299 2,743,013 2,760,312 Home equity 707 498 1,281 2,486 221,737 224,223 Consumer other 2,363 1,642 1,606 5,611 215,720 221,331 Total $ 17,644 $ 4,496 $ 26,945 $ 49,085 $ 8,990,601 $ 9,039,686 (In thousands) 30-59 Days Past Due 60-89 Days Past Due 90 Days or Greater Past Due Total Past Due Current Total Loans December 31, 2022 Construction $ — $ — $ — $ — $ 319,452 $ 319,452 Commercial multifamily — 214 — 214 619,874 620,088 Commercial real estate owner occupied 122 — 3,302 3,424 637,065 640,489 Commercial real estate non-owner occupied 143 — 191 334 2,495,903 2,496,237 Commercial and industrial 1,173 1,438 18,658 21,269 1,423,967 1,445,236 Residential real estate 3,694 2,134 11,724 17,552 2,294,895 2,312,447 Home equity 168 57 2,119 2,344 225,106 227,450 Consumer other 1,990 1,028 2,158 5,176 268,734 273,910 Total $ 7,290 $ 4,871 $ 38,152 $ 50,313 $ 8,284,996 $ 8,335,309 The following is a summary of loans on nonaccrual status and loans past due 90 days or more and still accruing as of December 31, 2023 and December 31, 2022: December 31, 2023 (In thousands) Nonaccrual Amortized Cost Nonaccrual With No Related Allowance Past Due 90 Days or Greater and Accruing Interest Income Recognized on Nonaccrual Construction $ — $ — $ — $ — Commercial multifamily — — — — Commercial real estate owner occupied 605 285 199 — Commercial real estate non-owner occupied 3,798 45 — — Commercial and industrial 8,665 5,586 104 — Residential real estate 6,696 2,796 3,991 — Home equity 961 122 320 — Consumer other 682 — 924 — Total $ 21,407 $ 8,834 $ 5,538 $ — The commercial and industrial loans nonaccrual amortized cost as of December 31, 2023 included medallion loans with a fair value of $0.4 million and a contractual balance of $8.8 million. December 31, 2022 (In thousands) Nonaccrual Amortized Cost Nonaccrual With No Related Allowance Past Due 90 Days or Greater and Accruing Interest Income Recognized on Nonaccrual Construction $ — $ — $ — $ — Commercial multifamily — — — — Commercial real estate owner occupied 2,202 1,411 1,100 — Commercial real estate non-owner occupied 191 73 — — Commercial and industrial 16,992 14,223 1,666 — Residential real estate 8,901 5,307 2,823 — Home equity 1,568 388 551 — Consumer other 1,260 2 898 — Total $ 31,114 $ 21,404 $ 7,038 $ — The commercial and industrial loans nonaccrual amortized cost as of December 31, 2022 included medallion loans with a fair value of $0.6 million and a contractual balance of $10.9 million. A financial asset is considered collateral-dependent when the debtor is experiencing financial difficulty and repayment is expected to be provided substantially through the sale or operation of the collateral. Expected credit losses for collateral-dependent loans are based on the fair value of the collateral at the reporting date, adjusted for selling costs as appropriate. Significant quarter over quarter changes are reflective of changes in nonaccrual status and not necessarily associated with credit quality indicators like appraisal value. The following table presents the amortized cost basis of individually analyzed collateral-dependent loans by loan portfolio segment: Type of Collateral (In thousands) Real Estate Investment Securities/Cash Other December 31, 2023 Construction $ — $ — $ — Commercial multifamily — — — Commercial real estate owner occupied 650 — — Commercial real estate non-owner occupied 342 — — Commercial and industrial 4,788 — 944 Residential real estate 5,035 — — Home equity 135 — — Consumer other 40 — — Total loans $ 10,990 $ — $ 944 Type of Collateral (In thousands) Real Estate Investment Securities/Cash Other December 31, 2022 Construction $ — $ — $ — Commercial multifamily — — — Commercial real estate owner occupied 2,793 — — Commercial real estate non-owner occupied 384 — — Commercial and industrial 288 — 16,931 Residential real estate 3,910 — — Home equity 501 — — Consumer other 2 — — Total loans $ 7,878 $ — $ 16,931 Modified Loans Occasionally, the Company modifies loans to borrowers in financial distress by providing principal forgiveness, term extension, an other-than-insignificant payment delay or interest rate reduction. When principal forgiveness is provided, the amount of forgiveness is charged-off against the allowance for credit losses. In some cases, the Company provides multiple types of concessions on one loan. Typically, one type of concession, such as a term extension, is granted initially. If the borrower continues to experience financial difficulty, another concession, such as principal forgiveness, may be granted. For the loans included in the "combination" columns below, multiple types of modifications have been made on the same loan within the current reporting period. The combination is at least two of the following: a term extension and principal forgiveness, an other-than-insignificant payment delay and/or an interest rate reduction. The following table presents the amortized cost basis of loans at December 31, 2023 that were both experiencing financial difficulty and modified during the year ended December 31, 2023, by class and by type of modification. The percentage of the amortized cost basis of loans that were modified to borrowers in financial distress as compared to the amortized cost basis of each class of financing receivable is also presented below: (In thousands) Principal Forgiveness Payment Delay Term Extension Interest Rate Reduction Combination Term Extension and Principal Forgiveness Combination Term Extension and Interest Rate Reduction Total Class of Financing Receivable Year ended December 31, 2023 Construction $ — $ — $ — $ — $ — $ — — % Commercial multifamily — — — — — — — Commercial real estate owner occupied — — 222 — — — 0.04 Commercial real estate non-owner occupied — — 11,454 — — 3,600 0.58 Commercial and industrial — 34 16,005 — — 9 1.18 % Residential real estate — — — — — — — Home equity — — — — — — — Consumer other — — — — — — — Total $ — $ 34 $ 27,681 $ — $ — $ 3,609 0.35 % The Company has committed to lend additional amounts totaling $7.8 million to the borrowers included in the previous table. The Company closely monitors the performance of loans that are modified to borrowers experiencing financial difficulty to understand the effectiveness of its modification efforts. The following table presents the performance of such loans that have been modified in the last 12 months. (In thousands) 30 - 59 Days Past Due 60 - 89 Days Past Due Greater Than 89 Days Past Due Total Past Due December 31, 2023 Construction $ — $ — $ — $ — Commercial multifamily — — — — Commercial real estate owner occupied — — — — Commercial real estate non-owner occupied — — — — Commercial and industrial 34 — — 34 Residential real estate — — — — Home equity — — — — Consumer other — — — — Total $ 34 $ — $ — $ 34 The following table presents the financial effect of the loan modifications presented above to borrowers experiencing financial difficulty for the year ended December 31, 2023: (In thousands) Principal Forgiveness Weighted Average Interest Rate Reduction Weighted Average Term Extension (months) Years ended December 31, 2023 Construction $ — — % 0 Commercial multifamily — — 0 Commercial real estate owner occupied — — 120 Commercial real estate non-owner occupied — 0.05 16 Commercial and industrial — 1.25 23 Residential real estate — — 0 Home equity — — 0 Consumer other — — 0 There were no loans that had a payment default during the years ended December 31, 2023 that were modified in the twelve months prior to that default to borrowers experiencing financial difficulty.

PREMISES AND EQUIPMENT

PREMISES AND EQUIPMENT	12 Months Ended
	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
PREMISES AND EQUIPMENT	PREMISES AND EQUIPMENT Year-end premises and equipment are summarized as follows: (In thousands) 2023 2022 Estimated Useful Land $ 12,525 $ 15,536 N/A Buildings and improvements 89,222 99,977 5 - 39 years Furniture and equipment 64,290 63,554 3 - 7 years Construction in process 327 1,147 Premises and equipment, gross 166,364 180,214 Accumulated depreciation and amortization (97,449) (94,997) Premises and equipment, net $ 68,915 $ 85,217 Depreciation and amortization expense for the years 2023, 2022, and 2021 amounted to $8.4 million, $9.6 million, and $11.0 million, respectively.

OTHER INTANGIBLES

OTHER INTANGIBLES	12 Months Ended
	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
OTHER INTANGIBLES	OTHER INTANGIBLES The components of other intangible assets are as follows: (In thousands) Gross Intangible Accumulated Net Intangible December 31, 2023 Non-maturity deposits (core deposit intangible) $ 77,213 $ (58,965) $ 18,248 All other intangible assets 7,866 (6,450) 1,416 Total $ 85,079 $ (65,415) $ 19,664 December 31, 2022 Non-maturity deposits (core deposit intangible) $ 77,213 $ (54,618) $ 22,595 All other intangible assets 7,866 (5,978) 1,888 Total $ 85,079 $ (60,596) $ 24,483 Other intangible assets are amortized on a straight-line or accelerated basis over their estimated lives, which range from four fifteen years . Amortization expense related to intangibles totaled $4.8 million in 2023, $5.1 million in 2022, and $5.2 million in 2021. The estimated aggregate future amortization expense for intangible assets remaining at year-end 2023 is as follows: 2024- $4.6 million; 2025- $4.5 million; 2026- $4.5 million; 2027- $3.6 million; 2028 - $1.8 million; and thereafter- $0.7 million. For the years 2023, 2022, and 2021, no impairment charges were identified for the Company’s intangible assets.

OTHER ASSETS

OTHER ASSETS	12 Months Ended
	Dec. 31, 2023
Other Assets [Abstract]
OTHER ASSETS	OTHER ASSETS Year-end other assets are summarized as follows: (In thousands) 2023 2022 Capitalized servicing rights $ 12,095 $ 13,047 Accrued interest receivable 53,096 46,868 Accrued federal and state tax receivable 33,564 34,386 Right-of-use assets 47,348 46,411 Derivative assets 45,668 54,241 Deferred tax asset 110,068 118,331 Other 39,918 35,651 Total other assets $ 341,757 $ 348,935 The Bank sells loans in the secondary market and retains the right to service many of these loans. The Bank earns fees for the servicing provided. At years end 2023, 2022, and 2021, loans sold and serviced for others amounted to $1.4 billion, $1.5 billion, and $1.6 billion, respectively. Loans serviced for others are not included in the accompanying Consolidated Balance Sheets. The risks inherent in servicing assets relate primarily to changes in prepayments that result from shifts in interest rates. For the years 2023, 2022, and 2021, contractually specified servicing fees were $6.7 million, $5.5 million, and $8.0 million, respectively, and are included as a component of loan related fees within non-interest income Servicing rights activity was as follows: (In thousands) 2023 2022 2021 Balance at beginning of year $ 13,047 $ 16,022 $ 16,348 Additions 2,892 3,119 4,568 Amortization (4,330) (4,590) (4,921) Payoffs (952) (958) — Allowance adjustment 1,438 (546) 27 Balance at end of year $ 12,095 $ 13,047 $ 16,022 (1) As of December 31, 2023 and December 31, 2022, the servicing rights included in the total balance accounted for at fair value were $1.5 million and $1.8 million, respectively. At December 31, 2023, the fair value of servicing rights was $16.6 million. At December 31, 2022, the fair value of servicing rights was $16.7 million.

DEPOSITS

DEPOSITS	12 Months Ended
	Dec. 31, 2023
Deposits [Abstract]
DEPOSITS	DEPOSITS A summary of year-end time deposits is as follows: (In thousands) 2023 2022 Maturity date: Within 1 year $ 2,364,280 $ 912,756 Over 1 year to 2 years 270,630 606,856 Over 2 years to 3 years 26,039 68,984 Over 3 years to 4 years 9,020 28,441 Over 4 years to 5 years 9,864 15,835 Over 5 years 6,417 835 Total $ 2,686,250 $ 1,633,707 Account balances: Less than $100,000 $ 724,911 $ 549,265 $100,000 through $250,000 1,276,175 642,600 $250,000 or more 685,164 441,842 Total $ 2,686,250 $ 1,633,707 Included in total deposits on the Consolidated Balance Sheets are brokered deposits of $524.4 million and $120.9 million at December 31, 2023 and December 31, 2022, respectively. Also included in total deposits are reciprocal deposits of $110.2 million and $71.1 million at December 31, 2023 and December 31, 2022, respectively, as well as related party deposits of $25.0 million and $22.3 million at December 31, 2023 and December 31, 2022, respectively.

BORROWED FUNDS

BORROWED FUNDS	12 Months Ended
	Dec. 31, 2023
Debt Disclosure [Abstract]
BORROWED FUNDS	BORROWED FUNDS Borrowed funds at December 31, 2023 and 2022 are summarized, as follows: 2023 2022 (in thousands, except rates) Principal Weighted Principal Weighted Short-term borrowings: Advances from the FHLBB $ 260,000 5.54 % $ — — % Total short-term borrowings: 260,000 5.54 — — Long-term borrowings: Advances from the FHLBB 125,223 4.80 4,445 0.71 Subordinated notes 98,335 5.50 98,089 5.50 Junior subordinated borrowing - Trust I 15,464 7.49 15,464 6.54 Junior subordinated borrowing - Trust II 7,564 7.35 7,511 6.47 Total long-term borrowings: 246,586 5.33 125,509 5.52 Total $ 506,586 5.44 % $ 125,509 5.52 % Short-term debt includes Federal Home Loan Bank of Boston (“FHLBB”) advances with an original maturity of less than one year. The Bank maintains a $3.0 million secured line of credit with the FHLBB that bears a daily adjustable rate calculated by the FHLBB. There was no outstanding balance on the FHLBB line of credit for the periods ended December 31, 2023 and December 31, 2022. The Bank's available borrowing capacity with the FHLB was $2.5 billion and $1.5 billion for the periods ended December 31, 2023 and December 31, 2022, respectively. The Company was in compliance with all debt covenants as of December 31, 2023. The Bank is approved to borrow on a short-term basis from the Federal Reserve Bank of Boston as a non-member bank. The Bank has pledged certain loans and securities to the Federal Reserve Bank to support this arrangement. No borrowings with the Federal Reserve Bank of Boston took place for the periods ended December 31, 2023 and December 31, 2022. The Bank's available borrowing capacity with the Federal Reserve Bank was $1.5 billion and $0.6 billion for the periods ended December 31, 2023 and December 31, 2022, respectively. Long-term FHLBB advances consist of advances with an original maturity of more than one year and are subject to prepayment penalties. There were no callable advances outstanding at December 31, 2023. The advances outstanding at December 31, 2023 included amortizing advances totaling $4.2 million. There were no callable advances outstanding at December 31, 2022. The advances outstanding at December 31, 2022 included amortizing advances totaling $4.4 million. All FHLBB borrowings, including the line of credit, are secured by a blanket security agreement on certain qualified collateral, principally all residential first mortgage loans and certain securities. A summary of maturities of FHLBB advances at year-end 2023 is as follows: 2023 (In thousands) Amount Weighted Fixed rate advances maturing: 2024 $ 290,010 5.48 % 2025 90,000 5.01 2026 521 2.20 2027 158 2.00 2028 and beyond 4,534 0.34 Total FHLBB advances $ 385,223 5.30 % The Company did not have variable-rate FHLB advances for the period ended December 31, 2023 and December 31, 2022. In June 2022, the Company issued ten year subordinated notes in the amount of $100.0 million. The interest rate is fixed at 5.50% for the first five years. After five years, the notes become callable and will bear interest at a floating rate per annum equal to a benchmark rate (which is expected to be Three-Month Term SOFR), plus 249 basis points. The subordinated note includes reduction to the note principal balance of $1.7 million for unamortized debt issuance costs as of December 31, 2023. The Company holds 100% of the common stock of Berkshire Hills Capital Trust I (“Trust I”) which is included in other assets with a cost of $0.5 million. The sole asset of Trust I is $15.5 million of the Company’s junior subordinated debentures due in 2035. These debentures bear interest at a variable rate equal to LIBOR plus 1.85% and had a rate of 7.49% and 6.54% at December 31, 2023 and December 31, 2022, respectively. The Company has the right to defer payments of interest for up to five years on the debentures at any time, or from time to time, with certain limitations, including a restriction on the payment of dividends to shareholders while such interest payments on the debentures have been deferred. The Company has not exercised this right to defer payments. The Company has the right to redeem the debentures at par value on each quarterly payment date. Trust I is considered a variable interest entity for which the Company is not the primary beneficiary. Accordingly, Trust I is not consolidated into the Company’s financial statements. The Company holds 100% of the common stock of SI Capital Trust II (“Trust II”) which is included in other assets with a cost of $0.2 million. The sole asset of Trust II is $8.2 million of the Company’s junior subordinated debentures due in 2036. These debentures bear interest at a variable rate equal to LIBOR plus 1.70% and had a rate of 7.35% and 6.47% at December 31, 2023 and December 31, 2022. The Company has the right to defer payments of interest for up to five years on the debentures at any time, or from time to time, with certain limitations, including a restriction on the payment of dividends to shareholders while such interest payments on the debentures have been deferred. The Company has not exercised this right to defer payments. The Company has the right to redeem the debentures at par value. Trust II is considered a variable interest entity for which the Company is not the primary beneficiary. Accordingly, Trust II is not consolidated into the Company’s financial statements.

OTHER LIABILITIES

OTHER LIABILITIES	12 Months Ended
	Dec. 31, 2023
Other Liabilities Disclosure [Abstract]
OTHER LIABILITIES	OTHER LIABILITIES Year-end other liabilities are summarized as follows: (In thousands) 2023 2022 Derivative liabilities $ 75,957 $ 97,030 Collateral on interest rate swaps 25,520 — Finance lease liabilities 8,681 9,306 Employee benefits liability 43,042 45,175 Operating lease liabilities 53,026 53,736 Accrued interest payable 13,766 1,610 Customer transaction clearing accounts 12,366 5,758 Allowance for credit losses on unfunded commitments 9,256 8,588 Other 37,016 34,821 Total other liabilities $ 278,630 $ 256,024

EMPLOYEE BENEFIT PLANS

EMPLOYEE BENEFIT PLANS	12 Months Ended
	Dec. 31, 2023
Retirement Benefits [Abstract]
EMPLOYEE BENEFIT PLANS	EMPLOYEE BENEFIT PLANS Pension Plan The Company maintains a legacy, employer-sponsored defined benefit pension plan (the “Plan”) for which participation and benefit accruals were frozen on January 1, 2003. The Plan was assumed in connection with the Rome Bancorp acquisition in 2011. Accordingly, no employees are permitted to commence participation in the Plan and future salary increases and years of credited service are not considered when computing an employee’s benefits under the Plan. As of December 31, 2023, all minimum Employee Retirement Income Security Act (“ERISA”) funding requirements have been met. Information regarding the pension plan is as follows: December 31, (In thousands) 2023 2022 Change in projected benefit obligation: Projected benefit obligation at beginning of year $ 3,729 $ 5,328 Service Cost 59 68 Interest cost 186 141 Actuarial loss (20) (1,508) Benefits paid (250) (263) Settlements (62) (37) Projected benefit obligation at end of year 3,642 3,729 Accumulated benefit obligation 3,642 3,729 Change in fair value of plan assets: Fair value of plan assets at plan beginning of year 4,683 5,962 Actual return on plan assets 628 (979) Contributions by employer — — Benefits paid (250) (263) Settlements (62) (37) Fair value of plan assets at end of year 4,999 4,683 (Overfunded) status $ (1,357) $ (954) Amounts Recognized on Consolidated Balance Sheets Other assets $ 1,357 $ 954 Other liabilities — — Net periodic pension cost is comprised of the following: December 31, (In thousands) 2023 2022 2021 Service Cost $ 59 $ 68 $ 59 Interest Cost 186 141 140 Expected return on plan assets (295) (376) (410) Amortization of unrecognized actuarial loss 6 11 103 Net periodic pension (credit) $ (44) $ (156) $ (108) Changes in plan assets and benefit obligations recognized in accumulated other comprehensive income are as follows: December 31, (In thousands) 2023 2022 2021 Amortization of actuarial (loss) $ (6) $ (11) $ (103) Actuarial (gain) (353) (154) (495) Settlement charge — — (58) Total recognized in accumulated other comprehensive income (359) (165) (656) Total recognized in net periodic pension cost recognized and other comprehensive income $ (403) $ (321) $ (764) The amounts in accumulated other comprehensive income/(loss) that have not yet been recognized as components of net periodic benefit cost are a net loss of $0.1 million, $0.5 million, and $0.7 million in 2023, 2022 and 2021, respectively. The Company did not make any cash contributions to the pension trust during 2023 and 2022. The Company does not expect to make any cash contributions in 2024. There is no gain/loss expected to be amortized from other comprehensive income into net periodic pension cost over the next fiscal year. The principal actuarial assumptions used are as follows: December 31, 2023 2022 2021 Projected benefit obligation Discount rate 4.99 % 5.21 % 2.73 % Net periodic pension cost Discount rate 5.21 % 2.73 % 2.35 % Long term rate of return on plan assets 6.50 % 6.50 % 7.00 % The discount rate that is used in the measurement of the pension obligation is determined by comparing the expected future retirement payment cash flows of the pension plan to the Above Median FTSE Pension Discount Curve as of the measurement date. The expected long-term rate of return on Plan assets reflects long-term earnings expectations on existing Plan assets and those contributions expected to be received during the current plan year. In estimating that rate, appropriate consideration was given to historical returns earned by Plan assets in the fund and the rates of return expected to be available for reinvestment. The rates of return were adjusted to reflect current capital market assumptions and changes in investment allocations. The Company’s overall investment strategy with respect to the Plan’s assets is primarily for preservation of capital and to provide regular dividend and interest payments. The Plan’s targeted asset allocation is 65% equity securities via investment in the Long-Term Growth - Equity Portfolio ("LTGE"), 34% intermediate-term investment grade bonds via investment in the Long-Term Growth - Fixed-Income Portfolio ("LTGFI"), and 1% in cash equivalents portfolio (for liquidity). Equity securities include investments in a diverse mix of equity funds to gain exposure in the US and international markets. The fixed income portion of the Plan assets is a diversified portfolio that primarily invests in intermediate-term bond funds. The overall rate of return is based on the historical performance of the assets applied against the Plan’s target allocation, and is adjusted for the long-term inflation rate. The fair values for investment securities are determined by quoted prices in active markets, if available (Level 1). For securities where quoted prices are not available, fair values are calculated based on market prices of similar securities (Level 2). For securities where quoted prices or market prices of similar securities are not available, fair values are calculated using discounted cash flows or other market indicators (Level 3). The fair value of the Plan’s assets by category within the fair value hierarchy are as follows at December 31, 2023 and December 31, 2022. During 2023, the Plan's equity mutual funds and fixed income mutual funds were transferred to Level 1 from Level 2 because they are actively traded and quoted prices were available. The Plan did not hold any assets classified as Level 3. December 31, 2023 Asset Category (In thousands) Total Level 1 Level 2 Equity Mutual Funds: Large-Cap $ 1,357 $ 1,357 $ — Mid-Cap 364 364 — Small-Cap 386 386 — International 828 828 — Fixed Income Mutual Funds: Intermediate Duration 1,674 1,674 — Equity Common/Collective Trusts: Large-Cap 336 — 336 Cash Equivalents - money market 54 54 — Total $ 4,999 $ 4,663 $ 336 December 31, 2022 Asset Category (In thousands) Total Level 1 Level 2 Equity Mutual Funds: Large-Cap $ 1,441 $ — $ 1,441 Mid-Cap 383 — 383 Small-Cap 318 — 318 International 814 — 814 Fixed Income - US Core 1,167 — 1,167 Intermediate Duration 396 — 396 Cash Equivalents - money market 164 72 92 Total $ 4,683 $ 72 $ 4,611 Estimated benefit payments under the pension plans over the next 10 years at December 31, 2023 are as follows: Year Payments (In thousands) 2024 277 2025 271 2026 264 2027 258 2028 - 2033 1,551 Multi-Employer Pension Plan As a result of the Company's acquisition of SI Financial Group, Inc. (“SIFI”), the Company participates in the Pentegra Defined Benefit Plan for Financial Institutions (the “DB Plan”), a tax-qualified defined benefit pension plan. The DB Plan operates as a multiple-employer plan under ERISA and the Internal Revenue Code, and as a multi-employer plan for accounting purposes. The DB Plan was frozen effective September 6, 2013. The Company made contributions of $136 thousand in 2023. As of July 1, 2023, the DB Plan held assets with a market value of $4.1 million and liabilities with a market value of $5.4 million. The funded status (market value of plan assets divided by funding target) of the DB Plan, was 80% as of July 1, 2023, as required by federal and state regulations. Market value of the DB Plan's assets reflects contributions received through June 30, 2023. There are no collective bargaining agreements in place that require contributions to the DB Plan by the Company. The DB Plan is a single plan under the Internal Revenue Code and, as a result, all of the assets stand behind all of the liabilities. Accordingly, contributions made by a participating employer may be used to provide benefits to participants of other participating employers. Postretirement Benefits The Company maintains an unfunded postretirement medical plan assumed in connection with the Rome Bancorp acquisition in 2011. The postretirement plan has been modified so that participation is closed to those employees who did not meet the retirement eligibility requirements by March 31, 2011. The Company contributes partially to medical benefits and life insurance coverage for retirees. Such retirees and their surviving spouses are responsible for the remainder of the medical benefits, including increases in premiums levels, between the total premium and the Company’s contribution. The Company also has an executive long-term care (“LTC”) postretirement benefit plan which started August 1, 2014. The LTC plan reimburses executives for certain costs in the event of a future chronic illness. Funding of the plan comes from Company paid insurance policies or direct payments. At the plan’s inception, a $558 thousand benefit obligation was recorded against equity representing the prior service cost of plan participants. Information regarding the postretirement plans is as follows: December 31, (In thousands) 2023 2022 Change in accumulated postretirement benefit obligation: Accumulated post-retirement benefit obligation at beginning of year $ 3,215 $ 4,521 Service Cost 7 12 Interest cost 166 122 Participant contributions — — Actuarial loss 58 (1,396) Benefits paid (140) (44) Accumulated post-retirement benefit obligation at end of year $ 3,306 $ 3,215 Change in plan assets: Fair value of plan assets at beginning of year $ — $ — Contributions by employer 140 44 Contributions by participant — — Benefits paid (140) (44) Fair value of plan assets at end of year $ — $ — Amounts Recognized on Consolidated Balance Sheets Other Liabilities $ 3,306 $ 3,215 Net periodic post-retirement cost is comprised of the following: December 31, (In thousands) 2023 2022 2021 Service cost $ 7 $ 12 $ 13 Interest costs 166 122 113 Amortization of net prior service credit 83 83 83 Amortization of net actuarial loss (64) 30 55 Net periodic post-retirement costs $ 192 $ 247 $ 264 Changes in benefit obligations recognized in accumulated other comprehensive income are as follows: December 31, (In thousands) 2023 2022 2021 Amortization of prior service credit $ (83) $ (83) $ (83) Net actuarial (gain) (1,148) (1,426) (253) Total recognized in accumulated other comprehensive income (1,231) (1,509) (336) Accrued post-retirement liability recognized $ 3,306 $ 3,215 $ 4,521 The amounts in accumulated other comprehensive income that have not yet been recognized as components of net periodic benefit cost are as follows: December 31, (In thousands) 2023 2022 2021 Net prior service cost $ 1,075 $ 1,159 $ 1,242 Net actuarial (gain)/loss (690) (812) 615 Total recognized in accumulated other comprehensive income $ 385 $ 347 $ 1,857 The amount expected to be amortized from other comprehensive income/(loss) into net periodic postretirement cost over the next fiscal year is $60 thousand. The discount rates used in the measurement of the postretirement plan obligations are determined by comparing the expected future retirement payment cash flows of the plans to the Above Median FTSE Pension Discount Curve as of the measurement date. The assumed discount rates on a weighted-average basis were 4.98% and 5.12% as of December 31, 2023 and December 31, 2022, respectively. The Company has fixed contributions, therefore, the annual rate of increase in healthcare costs is not used in measuring the accumulated post-retirement benefit medical obligation. For participants in the LTC plan covered by insurance policies, no increase in annual premiums is assumed based on the history of the corresponding insurance provider. Estimated benefit payments under the post-retirement benefit plan over the next ten years at December 31, 2023 are as follows: Year Payments (In thousands) 2024 115 2025 112 2026 108 2027 111 2028 - 2033 1,140 401(k) Plan The Company provides a 401(k) Plan in which most eligible employees participate. Expenses related to the plan were $3.1 million in 2023, $2.9 million in 2022, and $3.2 million in 2021. Other Plans The Company maintains supplemental executive retirement plans (“SERPs”) for select current and former executives. Benefits generally commence no earlier than age sixty-two The Company has endorsement split-dollar arrangements pertaining to certain current and former executives and directors. Under these arrangements, the Company purchased policies insuring the lives of the executives and directors, and separately entered into agreements to split the policy benefits with the individuals. There are no post-retirement benefits associated with these policies. The Company also assumed split-dollar life insurance agreements from multiple prior acquisitions. The accrued liability for these split-dollar arrangements was $7.0 million as of year-end 2023 and $7.9 million as of year-end 2022.

INCOME TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2023
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES Provision for Income Taxes The components of the Company’s provision for income taxes for the years ended December 31, 2023, 2022, and 2021 were, as follows: (In thousands) 2023 2022 2021 Current: Federal tax expense $ 5,596 $ 17,915 $ 17,340 State tax expense 7,497 6,831 7,580 Total current tax expense (1) 13,093 24,746 24,920 Deferred: Federal tax (benefit)/expense (2,658) (2,274) 5,125 State tax (benefit)/expense (1,711) (1,187) 112 Total deferred tax (benefit)/expense (4,369) (3,461) 5,237 Change in valuation allowance — — 200 Income tax expense $ 8,724 $ 21,285 $ 30,357 (1) The Company recorded an additional $500 thousand benefit in 2021 resulting from the carryback of its 2020 NOL to recover federal income taxes paid in 2015 through 2018 (at a 35% federal income tax rate for years 2015 through 2017). Effective Tax Rate The following is a reconciliation of the statutory federal income tax rate to the Company’s effective tax rate for the years ended December 31, 2023, 2022, and 2021: 2023 2022 2021 (In thousands, except rates) Amount Rate Amount Rate Amount Rate Statutory tax rate $ 16,448 21.0 % $ 23,902 21.0 % $ 31,294 21.0 % Increase (decrease) resulting from: State taxes, net of federal tax benefit 4,570 5.8 4,459 3.9 6,077 4.1 Tax exempt income - investments, net (3,611) (4.6) (3,515) (3.1) (3,475) (2.3) Bank-owned life insurance (1,568) (2.0) (1,258) (1.1) (1,348) (0.9) Tax credits, net of basis reduction (7,804) (10.0) (2,129) (1.9) (2,881) (1.9) Change in valuation allowance — — — — 200 0.1 Tax rate benefit on net operating loss carryback — — — — (493) (0.3) Other, net 689 0.9 (174) (0.1) 983 0.6 Effective tax rate $ 8,724 11.1 % $ 21,285 18.7 % $ 30,357 20.4 % Deferred Tax Assets and Liabilities As of December 31, 2023 and 2022, significant components of the Company’s deferred tax assets and liabilities were, as follows: (In thousands) 2023 2022 Deferred tax assets: Allowance for credit losses $ 31,181 $ 28,312 Unrealized capital loss on tax credit investments 2,688 1,603 Net unrealized loss on securities available for sale, swaps, and pension in OCI 50,704 63,335 Employee benefit plans 12,102 11,659 Purchase accounting adjustments 4,587 4,342 Net operating loss carryforwards 202 503 Deferred loan fees 5,654 4,049 Lease liability 13,583 14,148 Premises and equipment 1,188 2,630 Nonaccrual interest 890 1,069 Intangible amortization 1,020 659 Other 2,337 1,778 Deferred tax assets, net before valuation allowances 126,136 134,087 Valuation allowance (400) (400) Deferred tax assets, net of valuation allowances $ 125,736 $ 133,687 Deferred tax liabilities: Loan servicing rights $ (1,133) $ (1,212) Unamortized tax credit reserve (1,661) (1,687) Right-of-use asset (12,874) (12,457) Deferred tax liabilities $ (15,668) $ (15,356) Deferred tax assets, net $ 110,068 $ 118,331 The Company’s net deferred tax asset decreased by $8.3 million during 2023 and $12.6 million of this change is related to unrealized losses in OCI. Deferred tax assets, net of valuation allowances, are expected to be realized through the reversal of existing taxable temporary differences and future taxable income. Valuation Allowances The components of the Company’s valuation allowance on its deferred tax asset, net as of December 31, 2023 and 2022 were, as follows: (in thousands) 2023 2022 State valuation allowances $ (400) $ (400) The state tax valuation allowance, net of Federal benefit, was originally recorded in 2012, due to management's assessment that it is more likely than not that certain deferred tax assets recorded for the difference between the book basis and the state tax basis in certain tax credit limited partnership investments (LPs) will not be realized. Management anticipates that the remaining excess state tax basis realized upon termination of these partnerships will be a capital loss upon disposition, and that capital loss may not be deductible in some of the Company's state tax jurisdictions. The valuation allowance as of December 31, 2023 is subject to change in the future as the Company continues to periodically assess the likelihood of realizing its deferred tax assets. Tax Attributes At December 31, 2023, the Company has $491 thousand of federal net operating loss carryforwards, the utilization of which are limited under Internal Revenue Code Section 382. These net operating losses begin to expire in 2029. The related deferred tax asset is $103 thousand. State net operating loss carryforwards, net of valuation allowance described above, are expected to be utilized in the future and begin to expire in 2023. The related gross deferred tax asset is $99 thousand. Unrecognized Tax Benefits On a periodic basis, the Company evaluates its income tax positions based on tax laws and regulations and financial reporting considerations, and records adjustments as appropriate. This evaluation takes into consideration the status of taxing authorities’ current examinations of the Company’s tax returns, recent positions taken by the taxing authorities on similar transactions, if any, and the overall tax environment in relation to uncertain tax positions. The following table presents changes in unrecognized tax benefits for the years ended December 31, 2023, 2022, and 2021: (In thousands) 2023 2022 2021 Unrecognized tax benefits at January 1 $ 1,042 $ 1,025 $ 516 Increase in gross amounts of tax positions related to prior years 782 17 509 Decrease in gross amounts of tax positions related to prior years — — — Decrease due to settlement with taxing authority — — — Decrease due to lapse in statute of limitations — — — Unrecognized tax benefits at December 31 $ 1,824 $ 1,042 $ 1,025 It is reasonably possible that over the next twelve months the amount of unrecognized tax benefits may change from the reevaluation of uncertain tax positions arising in examinations, in appeals, or in the courts, or from the closure of tax statutes. The Company does not expect any significant changes in unrecognized tax benefits during the next twelve months. All of the Company’s unrecognized tax benefits, if recognized, would be recorded as a component of income tax expense, therefore, affecting the effective tax rate. The Company recognizes interest and penalties, if any, related to the liability for uncertain tax positions as a component of income tax expense. The accrual for interest and penalties was not material for all years presented.

DERIVATIVE INSTRUMENTS AND HEDG

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES	12 Months Ended
	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES	DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES At year-end 2023, the Company held derivatives with a total notional amount of $4.8 billion. That amount included $0.6 billion in interest rate swap derivatives and $0.2 billion in interest rate collars that were designated as cash flow hedges for accounting purposes. The Company had economic hedges and non-hedging derivatives totaling $4.0 billion and $11.1 million, respectively, which are not designated as hedges for accounting purposes and are therefore recorded at fair value with changes in fair value recorded directly through earnings. Economic hedges included interest rate swaps totaling $3.6 billion, risk participation agreements with dealer banks of $376.6 million, and $2.2 million in forward commitment contracts. As part of the Company’s risk management strategy, the Company enters into interest rate swap agreements to mitigate the interest rate risk inherent in certain of the Company’s assets and liabilities. Interest rate swap agreements involve the risk of dealing with both Bank customers and institutional derivative counterparties and their ability to meet contractual terms. The agreements are entered into with counterparties that meet established credit standards and contain master netting and collateral provisions protecting the at-risk party. The derivatives program is overseen by the Risk Management, Capital and Compliance Committee of the Company’s Board of Directors. Based on adherence to the Company’s credit standards and the presence of the netting and collateral provisions, the Company believes that the credit risk inherent in these contracts was not significant at December 31, 2023. The Company had no pledged collateral to derivative counterparties in the form of cash at year-end 2023. The Company had pledged securities to derivative counterparties with an amortized cost of $9.8 million and a fair value of $9.6 million at year-end 2023. The Company had no pledged collateral to derivative counterparties in the form of cash at year-end 2022. The Company had pledged securities to derivative counterparties with an amortized cost of $12.0 million and a fair value of $12.0 million at year-end 2022. The Company does not typically require its commercial customers to post cash or securities as collateral on its program of back-to-back economic hedges. However certain language is written into the International Swaps Dealers Association, Inc. (“ISDA”) and loan documents where, in default situations, the Bank is allowed to access collateral supporting the loan relationship to recover any losses suffered on the derivative asset or liability. The Company may need to post additional collateral in the future in proportion to potential increases in unrealized loss positions. Information about interest rate swap agreements and non-hedging derivative assets and liabilities at December 31, 2023 follows: Notional Weighted Weighted Average Rate Estimated December 31, 2023 Received Contract pay rate (In thousands) (In years) (In thousands) Cash flow hedges: Interest rate swaps on commercial loans (1) $ 600,000 1.9 3.64 % 5.35 % $ — Interest rate collars on commercial loans 200,000 2.5 1,658 Total cash flow hedges 800,000 1,658 Economic hedges: Interest rate swap on tax advantaged economic development bond $ 6,202 5.9 5.82 % 5.09 % $ (172) Interest rate swaps on loans with commercial loan customers (1) 1,795,562 4.9 4.36 % 6.27 % (63,865) Reverse interest rate swaps on loans with commercial loan customers (1) 1,795,562 4.9 6.27 % 4.36 % 32,053 Risk participation agreements with dealer banks 376,553 5.5 (18) Forward sale commitments 2,207 0.2 21 Total economic hedges 3,976,086 (31,981) Non-hedging derivatives: Commitments to lend 11,104 0.2 34 Total non-hedging derivatives 11,104 34 Total $ 4,787,190 $ (30,289) (1) Fair value estimates include the impact of $26.7 million settled to market contract agreements. Information about interest rate swap agreements and non-hedging derivative asset and liabilities at December 31, 2022 follows: Notional Weighted Weighted Average Rate Estimated December 31, 2022 Received Contract pay rate (In thousands) (In years) (In thousands) Cash flow hedges: Interest rate swaps on commercial loans (1) $ 400,000 2.7 4.09 % 3.51 % $ — Forward-starting interest rate swaps on commercial loans (1) 200,000 3.3 — % 3.90 % — Interest rate collars on commercial loans 200,000 3.5 1,937 Total cash flow hedges 800,000 1,937 Economic hedges: Interest rate swap on tax advantaged economic development bond $ 7,062 6.9 4.49 % 5.09 % $ (193) Interest rate swaps on loans with commercial loan customers 1,685,263 5.7 4.11 % 5.55 % (95,114) Reverse interest rate swaps on loans with commercial loan customers (1) 1,685,263 5.7 5.55 % 4.11 % 50,267 Risk participation agreements with dealer banks 341,885 6.6 (89) Forward sale commitments 927 0.2 8 Total economic hedges 3,720,400 (45,121) Non-hedging derivatives: Commitments to lend 4,114 0.2 17 Total non-hedging derivatives 4,114 17 Total $ 4,524,514 $ (43,167) (1) Fair value estimates include the impact of $38.3 million settled to market contract agreements. Cash flow hedges The effective portion of unrealized changes in the fair value of derivatives accounted for as cash flow hedges is reported in other comprehensive income/(loss) and subsequently reclassified to earnings in the same period or periods during which the hedged transaction is forecasted to affect earnings. Each quarter, the Company assesses the effectiveness of each hedging relationship by comparing the changes in cash flows of the derivative hedging instrument with the changes in cash flows of the designated hedged item or transaction. The ineffective portion of changes in the fair value of the derivatives is recognized directly in earnings. All cash flow hedges are considered highly effective. As of December 31, 2023, the Company had eight interest rate swap contracts with a notional value of $600.0 million. The interest rate swaps have durations of two As of December 31, 2023, the Company had two interest rate collars. The first interest rate collar has a 3.00% floor and a 5.75% cap with a notional value of $100.0 million. The second interest rate collar has a 3.25% floor and a 5.75% cap with a notional value of $100.0 million. The interest rate collars have durations of three Amounts included in the Consolidated Statements of Income and in the other comprehensive income/(loss) section of the Consolidated Statements of Comprehensive Income/(Loss) (related to interest rate derivatives designated as hedges of cash flows), were as follows: Years Ended December 31, (In thousands) 2023 2022 2021 Interest rate swaps and collars on commercial loans: Unrealized gain/(loss) recognized in accumulated other comprehensive loss $ 1,770 $ (6,667) $ — Less: Reclassification of unrealized (loss) from accumulated other comprehensive loss to interest income (632) — — Net tax benefit on items recognized in accumulated other comprehensive income (630) 1,789 — Other comprehensive gain/(loss) recorded in accumulated other comprehensive income/(loss), net of reclassification adjustments and tax effects $ 1,772 $ (4,878) $ — Net interest expense recognized on hedged commercial loans $ 9,026 $ (15) $ — Economic hedges As of December 31, 2023 the Company has an interest rate swap with a $6.2 million notional amount to swap out the fixed rate of interest on an economic development bond bearing a fixed rate of 5.09%, currently within the Company’s trading portfolio under the fair value option, in exchange for a SOFR-based floating rate. The intent of the economic hedge is to improve the Company’s asset sensitivity to changing interest rates in anticipation of favorable average floating rates of interest over the 21-year life of the bond. The fair value changes of the economic development bond are mostly offset by fair value changes of the related interest rate swap. The Company also offers certain derivative products directly to qualified commercial borrowers. The Company economically hedges derivative transactions executed with commercial borrowers by entering into mirror-image, offsetting derivatives with third-party financial institutions. The transaction allows the Company’s customer to convert a variable-rate loan to a fixed rate loan. Because the Company acts as an intermediary for its customer, changes in the fair value of the underlying derivative contracts mostly offset each other in earnings. There was no credit valuation loss adjustment arising from the difference in credit worthiness of the commercial loan and financial institution counterparties as of December 31, 2023. The interest income and expense on these mirror image swaps exactly offset each other. The Company has risk participation agreements with dealer banks. Risk participation agreements occur when the Company participates on a loan and a swap where another bank is the lead. The Company earns a fee to take on the risk associated with having to make the lead bank whole on Berkshire’s portion of the pro-rated swap should the borrower default. The Company utilizes forward sale commitments to hedge interest rate risk and the associated effects on the fair value of interest rate lock commitments and loans held for sale. The forward sale commitments are accounted for as derivatives with changes in fair value recorded in current period earnings. The company uses the following types of forward sale commitments contracts: • Best efforts loan sales, • Mandatory delivery loan sales, and • To be announced (TBA) mortgage-backed securities sales. A best efforts contract refers to a loan sales agreement where the Company commits to deliver an individual mortgage loan of a specified principal amount and quality to an investor if the loan to the underlying borrower closes. The Company may enter into a best efforts contract once the price is known, which is shortly after the potential borrower’s interest rate is locked. A mandatory delivery contract is a loan sales agreement where the Company commits to deliver a certain principal amount of mortgage loans to an investor at a specified price on or before a specified date. Generally, the Company may enter into mandatory delivery contracts shortly after the loan closes with a customer. The Company may sell to-be-announced mortgage-backed securities to hedge the changes in fair value of interest rate lock commitments and held for sale loans, which do not have corresponding best efforts or mandatory delivery contracts. These security sales transactions are closed once mandatory contracts are written. On the closing date the price of the security is locked-in, and the sale is paired-off with a purchase of the same security. Settlement of the security purchase/sale transaction is done with cash on a net-basis. Non-hedging derivatives The Company enters into commitments to lend for residential mortgage loans, which commit the Company to lend funds to a potential borrower at a specific interest rate and within a specified period of time. Commitments that relate to the origination of mortgage loans that will be held for sale are considered derivative financial instruments under applicable accounting guidance. Outstanding commitments expose the Company to the risk that the price of the mortgage loans underlying the commitments may decline due to increases in mortgage interest rates from inception of the rate lock to the funding of the loan. The commitments are free-standing derivatives which are carried at fair value with changes recorded in non-interest income in the Company’s Consolidated Statements of Income. Changes in the fair value of commitments subsequent to inception are based on changes in the fair value of the underlying loan resulting from the fulfillment of the commitment and changes in the probability that the loan will fund within the terms of the commitment, which is affected primarily by changes in interest rates and the passage of time. Amounts included in the Consolidated Statements of Income related to economic hedges and non-hedging derivatives were as follows: Years Ended December 31, (In thousands) 2023 2022 2021 Economic hedges Interest rate swap on industrial revenue bond: Unrealized gain/(loss) recognized in other non-interest income $ 21 $ 941 $ 619 Interest rate swaps on loans with commercial loan customers: Unrealized gain/(loss) recognized in other non-interest income 31,310 (171,272) (86,099) Favorable/(unfavorable) change in credit valuation adjustment recognized in other non-interest income — 1,809 1,431 Reverse interest rate swaps on loans with commercial loan customers: Unrealized (loss)/gain recognized in other non-interest income (31,310) 171,272 86,099 Risk Participation Agreements: Unrealized (loss) recognized in other non-interest income (74) (521) (233) Forward Commitments: Unrealized gain/(loss) recognized in other non-interest income 13 (126) (186) Non-hedging derivatives Commitments to lend: Unrealized gain/(loss) recognized in other non-interest income $ 17 $ (107) $ (611) Realized gain in other non-interest income 536 462 2,854 Assets and Liabilities Subject to Enforceable Master Netting Arrangements Interest Rate Swap Agreements (“Swap Agreements”) The Company enters into swap agreements to facilitate the risk management strategies for commercial banking customers. The Company mitigates this risk by entering into equal and offsetting swap agreements with highly rated third party financial institutions. The swap agreements are free-standing derivatives and are recorded at fair value in the Company’s Consolidated Balance Sheets. The Company is party to master netting arrangements with its financial institution counterparties; however, the Company does not offset assets and liabilities under these arrangements for financial statement presentation purposes. The master netting arrangements provide for a single net settlement of all swap agreements, as well as collateral, in the event of default on, or termination of, any one contract. Collateral generally in the form of marketable securities is received or posted by the counterparty with net liability positions, respectively, in accordance with contract thresholds. The Company had net asset positions with its financial institution counterparties totaling $39.8 million and $51.2 million as of December 31, 2023 and December 31, 2022, respectively. The Company had net asset positions with its commercial banking counterparties totaling $6.0 million and $1.0 million as of December 31, 2023 and December 31, 2022, respectively. The Company had net liability positions with its financial institution counterparties totaling $6.1 million and $1.2 million as of December 31, 2023 and December 31, 2022, respectively. The Company had net liability positions with its commercial banking counterparties totaling $69.8 million and $96.1 million as of December 31, 2023 and December 31, 2022, respectively. The following table presents the assets and liabilities subject to an enforceable master netting arrangement as of December 31, 2023 and December 31, 2022: Offsetting of Financial Assets and Derivative Assets Gross Gross Amounts Net Amounts of Assets Gross Amounts Not Offset in the Statements Financial Cash (in thousands) Net Amount As of December 31, 2023 Interest Rate Swap Agreements: Institutional counterparties $ 71,579 $ (31,812) $ 39,767 $ — $ — $ 39,767 Commercial counterparties 5,992 — 5,992 — — 5,992 Total $ 77,571 $ (31,812) $ 45,759 $ — $ — $ 45,759 Offsetting of Financial Liabilities and Derivative Liabilities Gross Gross Amounts Net Amounts of Liabilities Gross Amounts Not Offset in the Statements Financial Cash (in thousands) Net Amount As of December 31, 2023 Interest Rate Swap Agreements: Institutional counterparties $ (11,277) $ 5,142 $ (6,135) $ 9,633 $ — $ 3,498 Commercial counterparties (69,796) — (69,796) — — (69,796) Total $ (81,073) $ 5,142 $ (75,931) $ 9,633 $ — $ (66,298) Offsetting of Financial Assets and Derivative Assets Gross Gross Amounts Net Amounts of Assets Gross Amounts Not Offset in the Statements Financial Cash (in thousands) Net Amount As of December 31, 2022 Interest Rate Swap Agreements: Institutional counterparties $ 96,295 $ (45,046) $ 51,249 $ — $ — $ 51,249 Commercial counterparties 975 — 975 — — 975 Total $ 97,270 $ (45,046) $ 52,224 $ — $ — $ 52,224 Offsetting of Financial Liabilities and Derivative Liabilities Gross Gross Amounts Net Amounts of Liabilities Gross Amounts Not Offset in the Statements Financial Cash (in thousands) Net Amount As of December 31, 2022 Interest Rate Swap Agreements: Institutional counterparties $ (1,271) $ 36 $ (1,235) $ 11,973 $ — $ 10,738 Commercial counterparties (102,595) 6,507 (96,088) — — (96,088) Total $ (103,866) $ 6,543 $ (97,323) $ 11,973 $ — $ (85,350)

LEASES

LEASES	12 Months Ended
	Dec. 31, 2023
Leases [Abstract]
LEASES	LEASES Substantially all of the leases in which the Company is the lessee are comprised of real estate property for branches, ATM locations, and office space. Most of the Company’s leases are classified as operating leases. At December 31, 2023, lease expiration dates ranged from 1 month to 16 years. The following table represents the Consolidated Balance Sheets classification of the Company’s right-of-use (“ROU”) assets and lease liabilities: (In thousands) December 31, 2023 December 31, 2022 Lease Right-of-Use Assets Classification Operating lease right-of-use assets Other assets $ 47,348 $ 46,411 Finance lease right-of-use assets Premises and equipment, net 5,597 6,151 Total Lease Right-of-Use Assets $ 52,945 $ 52,562 Lease Liabilities Operating lease liabilities Other liabilities $ 53,026 $ 53,736 Finance lease liabilities Other liabilities 8,681 9,306 Total Lease Liabilities $ 61,707 $ 63,042 Supplemental information related to leases was as follows: December 31, 2023 December 31, 2022 Weighted-Average Remaining Lease Term (in years) Operating leases 8.3 9.3 Finance leases 10.8 11.8 Weighted-Average Discount Rate Operating leases 2.90 % 2.56 % Finance leases 5.00 % 5.00 % The Company has lease agreements with lease and non-lease components, which are generally accounted for separately. For real estate leases, non-lease components and other non-components, such as common area maintenance charges, real estate taxes, and insurance are not included in the measurement of the lease liability since they are generally able to be segregated. The Company does not have any material sub-lease agreements. Lease expense for operating leases for the year ended December 31, 2023 was $9.1 million. Variable lease components, such as consumer price index adjustments, are expensed as incurred and not included in ROU assets and operating lease liabilities. Lease expense for operating leases for the year ended December 31, 2022 was $9.7 million. Variable lease components, such as consumer price index adjustments, are expensed as incurred and not included in ROU assets and operating lease liabilities. Lease expense for operating leases for the year ended December 31, 2021 was $10.9 million. Variable lease components, such as consumer price index adjustments, are expensed as incurred and not included in ROU assets and operating lease liabilities. Supplemental cash flow information related to leases was as follows: (In thousands) December 31, 2023 December 31, 2022 December 31, 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 9,009 $ 9,438 $ 10,897 Operating cash flows from finance leases 446 476 503 Financing cash flows from finance leases 593 555 528 Right-of-use assets obtained in exchange for lease obligations: Operating leases 8,512 5,730 2,976 Finance leases — — — The following table presents a maturity analysis of the Company’s lease liability by lease classification at December 31, 2023: (In thousands) Operating Leases Finance Leases 2024 $ 9,519 $ 1,039 2025 8,533 1,039 2026 7,471 1,039 2027 6,589 1,039 2028 5,567 1,039 Thereafter 21,399 6,036 Total undiscounted lease payments 59,078 11,231 Less amounts representing interest (6,052) (2,550) Lease liability $ 53,026 $ 8,681
LEASES	LEASES Substantially all of the leases in which the Company is the lessee are comprised of real estate property for branches, ATM locations, and office space. Most of the Company’s leases are classified as operating leases. At December 31, 2023, lease expiration dates ranged from 1 month to 16 years. The following table represents the Consolidated Balance Sheets classification of the Company’s right-of-use (“ROU”) assets and lease liabilities: (In thousands) December 31, 2023 December 31, 2022 Lease Right-of-Use Assets Classification Operating lease right-of-use assets Other assets $ 47,348 $ 46,411 Finance lease right-of-use assets Premises and equipment, net 5,597 6,151 Total Lease Right-of-Use Assets $ 52,945 $ 52,562 Lease Liabilities Operating lease liabilities Other liabilities $ 53,026 $ 53,736 Finance lease liabilities Other liabilities 8,681 9,306 Total Lease Liabilities $ 61,707 $ 63,042 Supplemental information related to leases was as follows: December 31, 2023 December 31, 2022 Weighted-Average Remaining Lease Term (in years) Operating leases 8.3 9.3 Finance leases 10.8 11.8 Weighted-Average Discount Rate Operating leases 2.90 % 2.56 % Finance leases 5.00 % 5.00 % The Company has lease agreements with lease and non-lease components, which are generally accounted for separately. For real estate leases, non-lease components and other non-components, such as common area maintenance charges, real estate taxes, and insurance are not included in the measurement of the lease liability since they are generally able to be segregated. The Company does not have any material sub-lease agreements. Lease expense for operating leases for the year ended December 31, 2023 was $9.1 million. Variable lease components, such as consumer price index adjustments, are expensed as incurred and not included in ROU assets and operating lease liabilities. Lease expense for operating leases for the year ended December 31, 2022 was $9.7 million. Variable lease components, such as consumer price index adjustments, are expensed as incurred and not included in ROU assets and operating lease liabilities. Lease expense for operating leases for the year ended December 31, 2021 was $10.9 million. Variable lease components, such as consumer price index adjustments, are expensed as incurred and not included in ROU assets and operating lease liabilities. Supplemental cash flow information related to leases was as follows: (In thousands) December 31, 2023 December 31, 2022 December 31, 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 9,009 $ 9,438 $ 10,897 Operating cash flows from finance leases 446 476 503 Financing cash flows from finance leases 593 555 528 Right-of-use assets obtained in exchange for lease obligations: Operating leases 8,512 5,730 2,976 Finance leases — — — The following table presents a maturity analysis of the Company’s lease liability by lease classification at December 31, 2023: (In thousands) Operating Leases Finance Leases 2024 $ 9,519 $ 1,039 2025 8,533 1,039 2026 7,471 1,039 2027 6,589 1,039 2028 5,567 1,039 Thereafter 21,399 6,036 Total undiscounted lease payments 59,078 11,231 Less amounts representing interest (6,052) (2,550) Lease liability $ 53,026 $ 8,681

OTHER COMMITMENTS, CONTINGENCIE

OTHER COMMITMENTS, CONTINGENCIES, AND OFF-BALANCE SHEET ACTIVITIES	12 Months Ended
	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
OTHER COMMITMENTS, CONTINGENCIES, AND OFF-BALANCE SHEET ACTIVITIES	OTHER COMMITMENTS, CONTINGENCIES, AND OFF-BALANCE SHEET ACTIVITIES Credit Related Financial Instruments. The Company is a party to financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. Such commitments involve, to varying degrees, elements of credit, and interest rate risk in excess of the amount recognized in the accompanying Consolidated Balance Sheets. The Company’s exposure to credit loss in the event of non-performance by the other party to the financial instrument is represented by the contractual amount of these commitments. The Company uses the same credit policies in making commitments as it does for on-balance-sheet instruments. A summary of financial instruments outstanding whose contract amounts represent credit risk is as follows at year-end: (In thousands) 2023 2022 Commitments to originate new loans $ 256,877 $ 305,474 Unused funds on commercial and other lines of credit 1,146,415 966,523 Unadvanced funds on home equity lines of credit 347,543 336,924 Unadvanced funds on construction and real estate loans 467,702 694,091 Standby letters of credit 18,975 21,387 Total $ 2,237,512 $ 2,324,399 Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. The commitments for lines of credit may expire without being drawn upon. Therefore, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. These letters of credit are primarily issued to support borrowing arrangements. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. The Company considers standby letters of credit to be guarantees and the amount of the recorded liability related to such guarantees was not material at year-end 2023 and 2022. The Company has 28.9 million of commitments remaining for tax credit investments as of December 31, 2023. Employment and Change in Control Agreements. The Company and the Bank have change in control agreements with several officers which provide a severance payment in the event employment is terminated in conjunction with a defined change in control. Legal Claims.

SHAREHOLDERS' EQUITY AND EARNIN

SHAREHOLDERS' EQUITY AND EARNINGS PER COMMON SHARE	12 Months Ended
	Dec. 31, 2023
Equity [Abstract]
SHAREHOLDERS' EQUITY AND EARNINGS PER COMMON SHARE	SHAREHOLDERS’ EQUITY AND EARNINGS PER COMMON SHARE Minimum Regulatory Capital Requirements The Company and Bank are subject to various regulatory capital requirements administered by the federal and state banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if imposed, could have a direct material impact on the Company’s Consolidated Financial Statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and Bank must meet specific capital guidelines that involve quantitative measures of its assets, liabilities and certain off-balance-sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weighting and other factors. Quantitative measures established by regulation to ensure capital adequacy require the Company and Bank to maintain minimum amounts and ratios (set forth in the following table) of total and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined) and of Tier 1 capital to average assets (as defined). As of year-end 2023 and 2022, the Bank and the Company met the capital adequacy requirements. Regulators may set higher expected capital requirements in some cases based on their examinations. At December 31, 2023, the capital levels of both the Company and the Bank exceeded all regulatory capital requirements and their regulatory capital ratios were above the minimum levels. The capital levels of both the Company and the Bank at December 31, 2023 also exceeded the minimum capital requirements including the currently applicable BASEL III capital conservation buffer of 1.875%. As of year-end 2023 and 2022, the Bank met the conditions to be classified as “well capitalized” under the relevant regulatory framework. To be categorized as well capitalized, an institution must maintain minimum total risk-based, Tier 1 risk-based, and Tier 1 leverage ratios as set forth in the following tables. The Company and Bank’s actual and required capital amounts were as follows: Minimum Actual (Dollars in thousands) Amount Ratio Amount Ratio December 31, 2023 Company (Consolidated) Total capital to risk-weighted assets $ 1,371,740 14.36 % $ 764,130 8.00 % Common Equity Tier 1 Capital to risk weighted assets 1,149,620 12.04 429,823 4.50 Tier 1 capital to risk-weighted assets 1,171,957 12.27 573,098 6.00 Tier 1 capital to average assets 1,171,957 9.65 382,065 4.00 Total risk-weighted assets 9,551,627 N/A N/A N/A December 31, 2022 Company (Consolidated) Total capital to risk-weighted assets $ 1,336,029 14.60 % $ 732,070 8.00 % Common Equity Tier 1 Capital to risk weighted assets 1,130,522 12.35 411,789 4.50 Tier 1 capital to risk-weighted assets 1,152,808 12.60 549,052 6.00 Tier 1 capital to average assets 1,152,808 10.18 366,035 4.00 Total risk-weighted assets 9,150,869 N/A N/A N/A Minimum Minimum to be Well Actual (Dollars in thousands) Amount Ratio Amount Ratio Amount Ratio December 31, 2023 Bank Total capital to risk-weighted assets $ 1,268,037 13.29 % $ 763,503 8.00 % $ 954,379 10.00 % Common Equity Tier 1 Capital to risk weighted assets 1,167,282 12.23 429,470 4.50 620,346 6.50 Tier 1 capital to risk-weighted assets 1,167,282 12.23 572,627 6.00 763,503 8.00 Tier 1 capital to average assets 1,167,282 9.61 381,751 4.00 477,189 5.00 Total risk-weighted assets 9,543,786 N/A N/A N/A N/A N/A December 31, 2022 Bank Total capital to risk-weighted assets $ 1,239,722 13.56 % $ 731,259 8.00 % $ 914,074 10.00 % Common Equity Tier 1 Capital to risk weighted assets 1,155,280 12.64 411,333 4.50 594,148 6.50 Tier 1 capital to risk-weighted assets 1,155,280 12.64 548,444 6.00 731,259 8.00 Tier 1 capital to average assets 1,155,280 10.20 365,629 4.00 457,037 5.00 Total risk-weighted assets 9,140,737 N/A N/A N/A N/A N/A Common stock The Bank is subject to dividend restrictions imposed by various regulators, including a limitation on the total of all dividends that the Bank may pay to the Company in any calendar year. The total of all dividends shall not exceed the Bank’s net income for the current year (as defined by statute), plus the Bank’s net income retained for the two previous years, without regulatory approval. Dividends from the Bank are an important source of funds to the Company to make dividend payments on its common, to make payments on its borrowings, and for its other cash needs. The ability of the Company and the Bank to pay dividends is dependent on regulatory policies and regulatory capital requirements. The ability to pay such dividends in the future may be adversely affected by new legislation or regulations, or by changes in regulatory policies relating to capital, safety and soundness, and other regulatory concerns. The payment of dividends by the Company is subject to Delaware law, which generally limits dividends to an amount equal to an excess of the net assets of a company (the amount by which total assets exceed total liabilities) over statutory capital, or if there is no excess, to the Company’s net profits for the current and/or immediately preceding fiscal year. Accumulated other comprehensive income Year-end components of accumulated other comprehensive (loss) are as follows: (In thousands) 2023 2022 Other accumulated comprehensive (loss), before tax: Net unrealized holding (loss) on AFS securities $ (188,927) $ (236,887) Net (loss) on effective cash flow hedging derivatives (4,265) (6,667) Net unrealized holding (loss) on pension plans (528) (844) Income taxes related to items of accumulated other comprehensive (loss): Net unrealized holding loss on AFS securities 49,401 61,329 Net loss on effective cash flow hedging derivatives 1,159 1,789 Net unrealized holding loss on pension plans 144 228 Accumulated other comprehensive (loss) $ (143,016) $ (181,052) The following table presents the components of other comprehensive income/(loss) for the years ended December 31, 2023, 2022, and 2021: (In thousands) Before Tax Tax Effect Net of Tax Year Ended December 31, 2023 Net unrealized holding gain on AFS securities: Net unrealized gain arising during the period $ 22,903 $ (5,122) $ 17,781 Less: reclassification adjustment for (losses) realized in net income (25,057) 6,806 (18,251) Net unrealized holding gain on AFS securities 47,960 (11,928) 36,032 Net gain on cash flow hedging derivatives: Net unrealized gain arising during the period 1,770 (458) 1,312 Less: reclassification adjustment for (losses) realized in net income (632) 172 (460) Net gain on cash flow hedging derivatives 2,402 (630) 1,772 Net unrealized holding gain on pension plans Net unrealized gain arising during the period 316 (84) 232 Less: reclassification adjustment for (losses) realized in net income — — — Net unrealized holding gain on pension plans 316 (84) 232 Other comprehensive income $ 50,678 $ (12,642) $ 38,036 (In thousands) Before Tax Tax Effect Net of Tax Year Ended December 31, 2022 Net unrealized holding (loss) on AFS securities: Net unrealized (loss) arising during the period $ (235,075) $ 60,920 $ (174,155) Less: reclassification adjustment for gains realized in net income 6 (2) 4 Net unrealized holding (loss) on AFS securities (235,081) 60,922 (174,159) Net (loss) on cash flow hedging derivatives: Net unrealized (loss) arising during the period (6,667) 1,789 (4,878) Less: reclassification adjustment for (losses) realized in net income — — — Net (loss) on cash flow hedging derivatives (6,667) 1,789 (4,878) Net unrealized holding gain on pension plans Net unrealized gain arising during the period 1,674 (446) 1,228 Less: reclassification adjustment for (losses) realized in net income — — — Net unrealized holding gain on pension plans 1,674 (446) 1,228 Other comprehensive (loss) $ (240,074) $ 62,265 $ (177,809) (In thousands) Before Tax Tax Effect Net of Tax Year Ended December 31, 2021 Net unrealized holding (loss) on AFS securities: Net unrealized (loss) arising during the period $ (46,794) $ 11,937 $ (34,857) Less: reclassification adjustment for gains realized in net income — — — Net unrealized holding (loss) on AFS securities (46,794) 11,937 (34,857) Net unrealized holding gain on pension plans Net unrealized gain arising during the period 993 (250) 743 Less: reclassification adjustment for (losses) realized in net income — — — Net unrealized holding gain on pension plans 993 (250) 743 Other comprehensive (loss) $ (45,801) $ 11,687 $ (34,114) The following table presents the changes in each component of accumulated other comprehensive (loss)/income, for the years ended December 31, 2023, 2022, and 2021: (in thousands) Net unrealized holding gain (loss) on AFS Securities Net loss on effective cash flow hedging derivatives Net unrealized holding gain (loss) on pension plans Total Year Ended December 31, 2023 Balance at Beginning of Year $ (175,557) $ (4,878) $ (617) $ (181,052) Other comprehensive income before reclassifications 17,781 1,312 232 19,325 Amounts reclassified from accumulated other comprehensive income (18,251) (460) — (18,711) Total other comprehensive income 36,032 1,772 232 38,036 Balance at End of Period $ (139,525) $ (3,106) $ (385) $ (143,016) Year Ended December 31, 2022 Balance at Beginning of Year $ (1,398) $ — $ (1,845) $ (3,243) Other comprehensive (loss)/income before reclassifications (174,155) (4,878) 1,228 (177,805) Amounts reclassified from accumulated other comprehensive income 4 — — 4 Total other comprehensive (loss)/income (174,159) (4,878) 1,228 (177,809) Balance at End of Period $ (175,557) $ (4,878) $ (617) $ (181,052) Year Ended December 31, 2021 Balance at Beginning of Year $ 33,459 $ — $ (2,588) $ 30,871 Other comprehensive (loss)/income before reclassifications (34,857) — 743 (34,114) Amounts reclassified from accumulated other comprehensive income — — — — Total other comprehensive (loss)/income (34,857) — 743 (34,114) Balance at End of Period $ (1,398) $ — $ (1,845) $ (3,243) The following table presents the amounts reclassified out of each component of accumulated other comprehensive income/(loss) for the years ended December 31, 2023, 2022, and 2021: Affected Line Item in the Years Ended December 31, (in thousands) 2023 2022 2021 Realized (losses)/gains on AFS securities: $ (25,057) $ 6 $ — Non-interest income 6,806 (2) — Tax expense (18,251) 4 — Realized (losses) on cash flow hedging derivatives: (632) — — Interest expense — — — Non-interest expense 172 — — Tax benefit (460) — — Realized (losses) on pension plans: — — — Non-interest expense — — — Tax expense — — — Total reclassifications for the period $ (18,711) $ 4 $ — Earnings Per Common Share Basic earnings per common share (“EPS”) excludes dilution and is computed by dividing net income applicable to common stock by the weighted average number of common shares outstanding for the year. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock (such as stock options) were exercised or converted into additional common shares that would then share in the earnings of the entity. Diluted EPS is computed by dividing net income applicable to common stock by the weighted average number of common shares outstanding for the year, plus an incremental number of common-equivalent shares computed using the treasury stock method. Earnings per common share has been computed based on the following (average diluted shares outstanding is calculated using the treasury stock method): Years Ended December 31, (In thousands, except per share data) 2023 2022 2021 Net income $ 69,598 $ 92,533 $ 118,664 Average number of common shares issued 51,903 51,903 51,903 Less: average number of treasury shares 7,820 5,577 1,951 Less: average number of unvested stock award shares 795 762 712 Average number of basic common shares outstanding 43,288 45,564 49,240 Plus: dilutive effect of unvested stock award shares 216 345 309 Plus: dilutive effect of stock options outstanding — 5 5 Average number of diluted common shares outstanding 43,504 45,914 49,554 Basic earnings per common share $ 1.61 $ 2.03 $ 2.41 Diluted earnings per common share $ 1.60 $ 2.02 $ 2.39

STOCK-BASED COMPENSATION PLANS

STOCK-BASED COMPENSATION PLANS	12 Months Ended
	Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]
STOCK-BASED COMPENSATION PLANS	STOCK-BASED COMPENSATION PLANS The 2022 Equity Incentive Plan (the “2022 Plan”) permits the granting of a combination of Restricted Stock awards and incentive and non-qualified stock options (“Stock Options”) to employees and directors. A total of 1.2 million shares was authorized under the Plan. Awards may be granted as either Restricted Stock or Stock Options provided that any shares that are granted as Restricted Stock are counted against the share limit set forth as (1) one for every one share of Restricted Stock granted and (2) one for every one share of Stock Option granted. As of the 2022 Plan's effective date, all expired, canceled, and forfeited shares under the 2018 Plan are included in the 2022 Plan's available shares. As of year-end 2023, the Company had the ability to grant approximately 1.2 million shares under this plan. A summary of activity in the Company’s stock compensation plans is shown below: Non-vested Stock Stock Options Outstanding (Shares in thousands) Number of Shares Weighted- Average Number of Shares Weighted- Average Exercise Price Balance, December 31, 2022 704 $ 22.85 49 $ 26.46 Granted 446 26.18 — — Stock options exercised — — — — Stock awards vested (262) 21.29 — — Forfeited (103) 25.67 — — Expired — — — — Balance, December 31, 2023 785 $ 24.92 49 $ 26.46 Stock Awards The total compensation cost for stock awards recognized as expense was $7.5 million, $7.3 million, and $4.2 million, in the years 2023, 2022, and 2021, respectively. The total recognized tax benefit associated with this compensation cost was $2.0 million, $2.0 million, and $1.0 million, respectively. The weighted average fair value of stock awards granted was $26.18, $28.75, and $20.22 in 2023, 2022, and 2021, respectively. Stock awards vest over periods up to five years and are valued at the closing price of the stock on the grant date. Certain awards vest based on the Company's performance over established measurement periods. The total fair value of stock awards vested during 2023, 2022, and 2021 was $5.6 million, $5.1 million, and $4.3 million respectively. The unrecognized stock-based compensation expense related to unvested stock awards was $10.1 million as of year-end 2023. This amount is expected to be recognized over a weighted average period of two years. Option Awards Option awards are granted with an exercise price equal to the market price of the Company’s stock at the date of grant, and vest over periods up to five years. The options grant the holder the right to acquire a share of the Company’s common stock for each option held, and have a contractual life of ten years. As of year-end 2023, the weighted average remaining contractual term for options outstanding is two years. The Company generally issues shares from treasury stock as options are exercised. The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model. The expected dividend yield and expected term are based on management estimates. The expected volatility is based on historical volatility. The risk-free interest rates for the expected term are based on the U.S. Treasury yield curve in effect at the time of the grant. The Company did not grant options during 2023 and 2022.

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS	12 Months Ended
	Dec. 31, 2023
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	FAIR VALUE MEASUREMENTS A description of the valuation methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below. These valuation methodologies were applied to all of the Company’s financial assets and financial liabilities that are carried at fair value. Recurring Fair Value Measurements of Financial Instruments The following table summarizes assets and liabilities measured at fair value on a recurring basis as of year-end 2023 and 2022 segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value: December 31, 2023 (In thousands) Level 1 Level 2 Level 3 Total Trading security $ — $ — $ 6,142 $ 6,142 Available-for-sale securities: U.S Treasuries 7,981 — — 7,981 Municipal bonds and obligations — 63,853 — 63,853 Agency collateralized mortgage obligations — 347,874 — 347,874 Agency residential mortgage-backed securities — 417,480 — 417,480 Agency commercial mortgage-backed securities — 145,326 — 145,326 Corporate bonds — 35,192 3,923 39,115 Other bonds and obligations — 656 — 656 Marketable equity securities 13,029 — — 13,029 Loans held for investment — — 374 374 Loans held for sale — 2,237 — 2,237 Derivative assets — 45,613 55 45,668 Capitalized servicing rights — — 1,526 1,526 Derivative liabilities — 75,957 — 75,957 December 31, 2022 Level 1 Level 2 Level 3 Total (In thousands) Trading security $ — $ — $ 6,708 $ 6,708 Securities available for sale: U.S Treasuries 11,973 — — 11,973 Municipal bonds and obligations — 63,335 — 63,335 Agency collateralized mortgage obligations — 531,945 — 531,945 Agency residential mortgage-backed securities — 546,313 — 546,313 Agency commercial mortgage-backed securities — 228,468 — 228,468 Corporate bonds — 36,510 4,000 40,510 Other bonds and obligations — 656 656 Marketable equity securities 12,856 — — 12,856 Loans held for investment at fair value — — 605 605 Loans held for sale — 942 — 942 Derivative assets — 54,216 25 54,241 Capitalized servicing rights — — 1,846 1,846 Derivative liabilities — 97,030 — 97,030 During the years ended December 31, 2023 and December 31, 2022, there were no transfers between Level 1, 2 and 3. During the year ended December 31, 2021, the Company had one transfer totaling $4.0 million in corporate bonds from Level 2 to Level 3 based on recent inactivity in the market related to pricing information for similar bonds. Trading Security at Fair Value. The Company holds one security designated as a trading security. It is a tax advantaged economic development bond issued to the Company by a local nonprofit which provides wellness and health programs. The determination of the fair value for this security is determined based on a discounted cash flow methodology. Certain inputs to the fair value calculation are unobservable and there is little to no market activity in the security; therefore, the security meets the definition of a Level 3 security. The discount rate used in the valuation of the security is sensitive to movements in the 3-month LIBOR rate. Securities Available for Sale and Marketable Equity Securities . Marketable equity securities classified as Level 1 consist of publicly-traded equity securities for which the fair values can be obtained through quoted market prices in active exchange markets. Marketable equity securities classified as Level 2 consist of securities with infrequent trades in active exchange markets, and pricing is primarily sourced from third party pricing services. AFS securities classified as Level 2 include most of the Company’s debt securities. The pricing on Level 2 and Level 3 was primarily sourced from third party pricing services, overseen by management, and is based on models that consider standard input factors such as dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and condition, among other things. Level 3 pricing includes inputs unobservable to market participants. Loans Held for Investment. The Company’s held for investment loan portfolio includes loans originated by Company and loans acquired through business combinations. The Company intends to hold these assets until maturity as a part of its business operations. For one acquired portfolio subset, the Company previously accounted for these purchased-credit impaired loans as a pool under ASC 310, as they were determined to have common risk characteristics. These loans were recorded at fair value on acquisition date and subsequently evaluated for impairment collectively. Upon adoption of ASC 326, the Company elected the fair value option on this portfolio, recognizing a $11.2 million fair value write-down charged to Retained Earnings, net of deferred tax impact, as of January 1, 2020. The fair value of this loan portfolio is determined based on a discounted cash flow methodology. Certain inputs to the fair value calculation are unobservable; therefore, the loans meet the definition of Level 3 assets. The discount rate used in the valuation is consistent with assets that have significant credit deterioration. The cash flow assumptions include payment schedules for loans with current payment histories and estimated collateral value for delinquent loans. All of these loans were nonperforming as of December 31, 2023. Aggregate Fair Value December 31, 2023 Aggregate Aggregate Less Aggregate (In thousands) Fair Value Unpaid Principal Unpaid Principal Loans held for investment at fair value $ 374 $ 8,809 $ (8,435) Aggregate Fair Value December 31, 2022 Aggregate Aggregate Less Aggregate (In thousands) Fair Value Unpaid Principal Unpaid Principal Loans held for investment at fair value $ 605 $ 10,948 $ (10,343) Loans held for sale. The Company elected the fair value option for all mortgage loans originated for sale ("HFS") that were originated for sale on or after May 1, 2012. Loans HFS are classified as Level 2 as the fair value is based on input factors such as quoted prices for similar loans in active markets. Aggregate Aggregate Aggregate Fair Value December 31, 2023 (In thousands) Loans held for sale $ 2,237 $ 2,205 $ 32 Aggregate Aggregate Aggregate Fair Value December 31, 2022 (In thousands) Loans held for sale $ 942 $ 927 $ 15 The changes in fair value of loans held for sale for the year ended December 31, 2023 were gains of $17 thousand. The changes in fair value of loans held for sale for the year ended December 31, 2022 were losses of $169 thousand. The changes in fair value of loans held for sale for the year ended December 31, 2021 were gains of $169 thousand. During 2023, originations of loans held for sale totaled $85 million and sales of loans originated for sale totaled $84 million. During 2022, originations of loans held for sale totaled $20 million and sales of loans originated for sale totaled $25 million. During 2021, originations of loans held for sale totaled $104 million and sales of loans originated for sale totaled $108 million. Interest Rate Swaps. The valuation of the Company’s interest rate swaps is obtained from a third-party pricing service and is determined using a discounted cash flow analysis on the expected cash flows of each derivative. The pricing analysis is based on observable inputs for the contractual terms of the derivatives, including the period to maturity and interest rate curves. The Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of netting and any applicable credit enhancements, such as collateral postings. Although the Company has determined that the majority of the inputs used to value its interest rate derivatives fall within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with its derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by itself and its counterparties. However, as of year-end 2023, the Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives. As a result, the Company has determined that its derivative valuations in their entirety are classified in Level 2 of the fair value hierarchy. Commitments to Lend. The Company enters into commitments to lend for residential mortgage loans intended for sale, which commit the Company to lend funds to a potential borrower at a certain interest rate and within a specified period of time. The estimated fair value of commitments to originate residential mortgage loans for sale is based on quoted prices for similar loans in active markets. However, this value is adjusted by a factor which considers the likelihood that the loan commitment will ultimately close, and by the non-refundable costs of originating the loan. The closing ratio is derived from the Bank’s internal data and is adjusted using significant management judgment. The costs to originate are primarily based on the Company’s internal commission rates that are not observable. As such, these commitments to lend are classified as Level 3 measurements. Forward Sale Commitments . The Company utilizes forward sale commitments as economic hedges against potential changes in the values of the commitments to lend and loans originated for sale. To be announced (TBA) mortgage-backed securities forward commitment sales are used as hedging instruments, are classified as Level 1, and consist of publicly-traded debt securities for which identical fair values can be obtained through quoted market prices in active exchange markets. The fair values of the Company’s best efforts and mandatory delivery loan sale commitments are determined similarly to the commitments to lend using quoted prices in the market place that are observable. However, costs to originate and closing ratios included in the calculation are internally generated and are based on management’s judgment and prior experience, which are considered factors that are not observable. As such, best efforts and mandatory forward sale commitments are classified as Level 3 measurements. Capitalized Servicing Rights. The Company accounts for certain capitalized servicing rights at fair value in its Consolidated Financial Statements, as the Company is permitted to elect the fair value option for each specific instrument. A loan servicing right asset represents the amount by which the present value of the estimated future net cash flows to be received from servicing loans exceed adequate compensation for performing the servicing. The fair value of servicing rights is estimated using a present value cash flow model. The most important assumptions used in the valuation model are the anticipated rate of the loan prepayments and discount rates. Although some assumptions in determining fair value are based on standards used by market participants, some are based on unobservable inputs and therefore are classified in Level 3 of the valuation hierarchy. The table below presents the changes in Level 3 assets that were measured at fair value on a recurring basis at year-end 2023 and 2022: Assets (Liabilities) (In thousands) Trading Securities Available for Sale Loans Held for Investment Commitments to Lend Forward Capitalized Servicing Rights Balance as of December 31, 2021 $ 8,354 $ 4,030 $ 1,200 $ 124 $ 134 $ 1,966 Unrealized (loss) gain, net recognized in other non-interest income (828) — 314 200 (126) (120) Unrealized (loss) included in accumulated other comprehensive loss — (30) — — — — Paydown of asset (818) — (909) — — — Transfers to loans held for sale — — — (307) — — Balance as of December 31, 2022 $ 6,708 $ 4,000 $ 605 $ 17 $ 8 $ 1,846 Unrealized gain (loss), net recognized in other non-interest income 294 — (128) 305 13 (320) Unrealized (loss) in included in accumulated other comprehensive loss — (77) — — — — Paydown of asset (860) — (103) — — — Transfers to loans held for sale — — (288) — — Balance as of December 31, 2023 $ 6,142 $ 3,923 $ 374 $ 34 $ 21 $ 1,526 Unrealized (losses)/gains relating to instruments still held at December 31, 2023 $ (60) $ (77) $ — $ 34 $ 21 $ — Unrealized (losses)/gains relating to instruments still held at December 31, 2022 $ (354) $ — $ — $ 17 $ 8 $ — Quantitative information about the significant unobservable inputs within Level 3 recurring assets/(liabilities) as of December 31, 2023 and 2022 are as follows: Fair Value Significant Unobservable Input Value (In thousands) December 31, 2023 Valuation Techniques Unobservable Inputs Assets Trading Security $ 6,142 Discounted Cash Flow Discount Rate 4.19 % Securities Available for Sale 3,923 Indication from Market Maker Price 98.07 % Loans held for investment 374 Discounted Cash Flow Discount Rate 25.00 % Collateral Value $0.0 - $18.3 Commitments to Lend 34 Historical Trend Closing Ratio 84.29 % Pricing Model Origination Costs, per loan $ 3 Forward Commitments 21 Historical Trend Closing Ratio 84.29 % Pricing Model Origination Costs, per loan $ 3 Capitalized Servicing Rights 1,526 Discounted cash flow Constant prepayment rate (CPR) 7.63 % Discount rate 11.08 % Total $ 12,020 Fair Value Significant (In thousands) December 31, 2022 Valuation Techniques Unobservable Inputs Assets Trading Security $ 6,708 Discounted Cash Flow Discount Rate 5.92 % Securities Available for Sale 4,000 Indication from Market Maker Price 100.00 % Loans held for investment 605 Discounted Cash Flow Discount Rate 25.00 % Collateral Value $0.0 -$20.4 Commitments to Lend 17 Historical Trend Closing Ratio 80.63 % Pricing Model Origination Costs, per loan $ 2 Forward Commitments 8 Historical Trend Closing Ratio 80.63 % Pricing Model Origination Costs, per loan $ 2 Capitalized Servicing Rights 1,846 Discounted cash flow Constant prepayment rate (CPR) 11.07 % Discount rate 9.56 % Total $ 13,184 Non-Recurring Fair Value Measurements The Company is required, on a non-recurring basis, to adjust the carrying value or provide valuation allowances for certain assets using fair value measurements in accordance with GAAP. The following is a summary of applicable non-recurring fair value measurements. There are no liabilities measured on a non-recurring basis. December 31, 2023 Fair Value Measurements as of December 31, 2023 (In thousands) Level 3 Level 3 Assets Individually evaluated loans $ 4,395 December 2023 Capitalized servicing rights 10,569 December 2023 Total $ 14,964 December 31, 2022 Fair Value Measurements as of December 31, 2022 (In thousands) Level 3 Level 3 Assets Individually evaluated loans $ 14,571 December 2022 Loans held for sale $ 3,369 December 2022 Capitalized servicing rights 11,201 December 2022 Total $ 29,141 Quantitative information about the significant unobservable inputs within Level 3 non-recurring assets as of December 31, 2023 and 2022 are as follows: (in thousands) December 31, 2023 Valuation Techniques Unobservable Inputs Range (Weighted Average) (a) Assets Individually evaluated loans $ 4,395 Fair value of collateral Discounted Cash Flow- Loss Severity (100.00)% to (0.08)% ((67.00)%) Appraised value $0 to $3,389 ($2,774) Capitalized servicing rights 10,569 Discounted cash flow Constant prepayment rate (CPR) 5.43% to 17.15% 12.31% Discount rate 10.09% to 16.59% (13.82%) Total Assets $ 14,964 (a) Where dollar amounts are disclosed, the amounts represent the lowest and highest fair value of the respective assets in the population except for adjustments for market/property conditions, which represents the range of adjustments to individual properties. (in thousands) December 31, 2022 Valuation Techniques Unobservable Inputs Range (Weighted Average) (a) Assets Individually evaluated loans $ 14,571 Fair value of collateral Discounted Cash Flow- Loss Severity (100.00)% to 74.74% ((40.02)%) Appraised value $0 to $2,160 ($643) Loans held for sale 3,369 Fair value of collateral Appraised value $3,369 Capitalized servicing rights 11,201 Discounted cash flow Constant prepayment rate (CPR) 5.81% to 13.18% (10.94%) Discount rate 9.59% to 22.70% (16.83%) Total Assets $ 29,141 (a) Where dollar amounts are disclosed, the amounts represent the lowest and highest fair value of the respective assets in the population except for adjustments for market/property conditions, which represents the range of adjustments to individual properties. There were no Level 1 or Level 2 nonrecurring fair value measurements for year-end 2023 and 2022. Individually evaluated loans. Loans are generally not recorded at fair value on a recurring basis. Periodically, the Company records non-recurring adjustments to the carrying value of loans based on fair value measurements for partial charge-offs of the uncollectible portions of those loans. Non-recurring adjustments can also include certain impairment amounts for collateral-dependent loans calculated when establishing the allowance for credit losses. Such amounts are generally based on the fair value of the underlying collateral supporting the loan and, as a result, the carrying value of the loan less the calculated valuation does not necessarily represent the fair value of the loan. Real estate collateral is typically valued using appraisals or other indications of value based on recent comparable sales of similar properties or assumptions generally observable in the marketplace. However, the choice of observable data is subject to significant judgment, and there are often adjustments based on judgment in order to make observable data comparable and to consider the impact of time, the condition of properties, interest rates, and other market factors on current values. Additionally, commercial real estate appraisals frequently involve discounting of projected cash flows, which relies inherently on unobservable data. Therefore, real estate collateral related nonrecurring fair value measurement adjustments have generally been classified as Level 3. Estimates of fair value for other collateral that supports commercial loans are generally based on assumptions not observable in the marketplace and therefore such valuations have been classified as Level 3. Loans Transferred to Held for Sale. Once a decision has been made to sell loans not previously classified as held for sale, these loans are transferred into the held for sale category and carried at the lower of cost or fair value. Real estate collateral is typically valued using appraisals or other indications of value based on recent comparable sales of similar properties or assumptions generally observable in the marketplace. The choice of observable data is subject to significant judgment, and there are often adjustments based on judgment in order to make observable data comparable and to consider the impact of time, the condition of properties, interest rates, and other market factors on current values. Nonrecurring fair value measurement adjustments that relate to real estate collateral have generally been classified as Level 3. Estimates of fair value for other collateral that supports commercial loans are generally based on assumptions not observable in the marketplace and therefore such valuations have been classified as Level 3. Capitalized loan servicing rights . A loan servicing right asset represents the amount by which the present value of the estimated future net cash flows to be received from servicing loans exceed adequate compensation for performing the servicing. The fair value of servicing rights is estimated using a present value cash flow model. The most important assumptions used in the valuation model are the anticipated rate of the loan prepayments and discount rates. Adjustments are only recorded when the discounted cash flows derived from the valuation model are less than the carrying value of the asset. Although some assumptions in determining fair value are based on standards used by market participants, some are based on unobservable inputs and therefore are classified in Level 3 of the valuation hierarchy. Summary of Estimated Fair Values of Financial Instruments The following tables summarize the estimated fair values, which represent exit price, and related carrying amounts, of the Company’s financial instruments. Certain financial instruments and all non-financial instruments are excluded from disclosure requirements. Accordingly, the aggregate fair value amounts presented herein may not necessarily represent the underlying fair value of the Company. December 31, 2023 Carrying Fair (In thousands) Level 1 Level 2 Level 3 Financial Assets Cash and cash equivalents $ 1,203,244 $ 1,203,244 $ 1,203,244 $ — $ — Trading security 6,142 6,142 — — 6,142 Marketable equity securities 13,029 13,029 13,029 — — Securities available for sale 1,022,285 1,022,285 7,981 1,010,381 3,923 Securities held to maturity 543,351 476,228 — 474,742 1,486 FHLB stock and restricted equity securities 22,689 N/A N/A N/A N/A Net loans 8,934,329 8,768,108 — — 8,768,108 Loans held for sale 2,237 2,237 — 2,237 — Accrued interest receivable 53,096 53,096 — 53,096 — Derivative assets 45,668 45,668 — 45,613 55 Financial Liabilities Total deposits 10,633,384 10,615,655 — 10,615,655 — Short-term debt 260,000 260,035 — 260,035 — Long-term FHLB advances 125,223 123,747 — 123,747 — Subordinated notes 121,363 98,138 — 98,138 — Accrued interest payable 13,766 13,766 — 13,766 — Derivative liabilities 75,957 75,957 — 75,957 — December 31, 2022 Carrying Fair (In thousands) Level 1 Level 2 Level 3 Financial Assets Cash and cash equivalents $ 685,355 $ 685,355 $ 685,355 $ — $ — Trading security 6,708 6,708 — — 6,708 Marketable equity securities 12,856 12,856 12,856 — — Securities available for sale 1,423,200 1,423,200 11,973 1,407,227 4,000 Securities held to maturity 583,453 507,464 — 505,508 1,956 FHLB stock and restricted equity securities 7,219 N/A N/A N/A N/A Net loans 8,239,039 8,194,110 — — 8,194,110 Loans held for sale 4,311 4,311 — 942 3,369 Accrued interest receivable 46,868 46,868 — 46,868 — Derivative assets 54,241 54,241 — 54,216 25 Financial Liabilities Total deposits 10,327,269 10,283,543 — 10,283,543 — Short-term debt — — — — — Long-term FHLB advances 4,445 2,782 — 2,782 — Subordinated notes 121,064 110,853 — 110,853 — Accrued interest payable 1,610 1,610 — 1,610 — Derivative liabilities 97,030 97,030 — 97,030 —

CONDENSED FINANCIAL STATEMENTS

CONDENSED FINANCIAL STATEMENTS OF PARENT COMPANY	12 Months Ended
	Dec. 31, 2023
Condensed Financial Information Disclosure [Abstract]
CONDENSED FINANCIAL STATEMENTS OF PARENT COMPANY	CONDENSED FINANCIAL STATEMENTS OF PARENT COMPANY Condensed financial information pertaining only to the Parent, Berkshire Hills Bancorp, is as follows. CONDENSED BALANCE SHEETS December 31, (In thousands) 2023 2022 Assets Cash due from Berkshire Bank $ 98,452 $ 90,022 Investment in subsidiaries 1,038,039 986,805 Other assets 399 1,445 Total assets $ 1,136,890 $ 1,078,272 Liabilities and Shareholders’ Equity Subordinated notes $ 121,363 $ 121,064 Accrued expenses 3,306 3,146 Shareholders’ equity 1,012,221 954,062 Total liabilities and shareholders’ equity $ 1,136,890 $ 1,078,272 CONDENSED STATEMENTS OF INCOME Years Ended December 31, (In thousands) 2023 2022 2021 Income: Dividends from subsidiaries $ 62,000 $ 108,000 $ 118,000 Other 50 23 31 Total income 62,050 108,023 118,031 Interest expense 5,697 7,044 5,393 Non-interest expenses 3,702 2,754 2,719 Total expense 9,399 9,798 8,112 Income before income taxes and equity in undistributed income of subsidiaries 52,651 98,225 109,919 Income tax (benefit) (2,500) (2,586) (2,136) Income before equity in undistributed income of subsidiaries 55,151 100,811 112,055 Equity in undistributed results of operations of subsidiaries 14,447 (8,278) 6,609 Net income 69,598 92,533 118,664 Comprehensive income/(loss) $ 107,634 $ (85,276) $ 84,550 CONDENSED STATEMENTS OF CASH FLOWS Years Ended December 31, (In thousands) 2023 2022 2021 Cash flows from operating activities: Net income $ 69,598 $ 92,533 $ 118,664 Adjustments to reconcile net income to net cash provided by operating activities: Equity in undistributed results of operations of subsidiaries (14,447) 8,278 (6,609) Other, net 8,688 5,998 5,816 Net cash provided by operating activities 63,839 106,809 117,871 Cash flows from investing activities: Sale of securities — — 167 Net cash provided by investing activities — — 167 Cash flows from financing activities: Proceeds from issuance of short term debt — — 232 Proceeds from issuance of long term debt — 98,032 — Repayment of long term debt — (75,000) — Payment to repurchase common stock (23,844) (124,519) (68,712) Common stock cash dividends paid (31,707) (24,527) (24,553) Other, net 142 281 431 Net cash (used) in financing activities (55,409) (125,733) (92,602) Net change in cash and cash equivalents 8,430 (18,924) 25,436 Cash and cash equivalents at beginning of year 90,022 108,946 83,510 Cash and cash equivalents at end of year $ 98,452 $ 90,022 $ 108,946

QUARTERLY DATA (UNAUDITED)

QUARTERLY DATA (UNAUDITED)	12 Months Ended
	Dec. 31, 2023
Quarterly Financial Information Disclosure [Abstract]
QUARTERLY DATA (UNAUDITED)	QUARTERLY DATA (UNAUDITED) Quarterly results of operations were as follows: 2023 2022 (In thousands, except per share data) Fourth Quarter Third Quarter Second Quarter First Quarter Fourth Quarter Third Quarter Second Quarter First Quarter Interest and dividend income $ 150,537 $ 148,021 $ 145,425 $ 132,316 $ 121,384 $ 103,671 $ 87,379 $ 74,823 Interest expense 62,116 57,687 52,666 34,783 19,292 11,587 6,021 5,760 Net interest income 88,421 90,334 92,759 97,533 102,092 92,084 81,358 69,063 Non-interest income (8,383) 17,465 17,094 16,606 15,654 16,251 16,351 20,681 Total revenue 80,038 107,799 109,853 114,139 117,746 108,335 97,709 89,744 Provision expense/(benefit) for credit losses 7,000 8,000 8,000 8,999 12,000 3,000 — (4,000) Non-interest expense 78,992 76,513 74,048 71,955 70,014 81,677 68,475 68,550 Income before income taxes (5,954) 23,286 27,805 33,185 35,732 23,658 29,234 25,194 Income tax (benefit)/expense (4,509) 3,741 3,944 5,548 5,227 4,941 6,119 4,998 Net income $ (1,445) $ 19,545 $ 23,861 $ 27,637 $ 30,505 $ 18,717 $ 23,115 $ 20,196 Basic earnings per share $ (0.03) $ 0.45 $ 0.55 $ 0.63 $ 0.69 $ 0.42 $ 0.50 $ 0.42 Diluted earnings per share $ (0.03) $ 0.45 $ 0.55 $ 0.63 $ 0.69 $ 0.42 $ 0.50 $ 0.42 Weighted average common shares outstanding: Basic 42,852 43,164 43,443 43,693 44,105 44,700 45,818 47,668 Diluted 43,101 43,347 43,532 44,036 44,484 45,034 46,102 48,067

NET INTEREST INCOME AFTER PROVI

NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES	12 Months Ended
	Dec. 31, 2023
Banking and Thrift, Interest [Abstract]
NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES	NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES Presented below is net interest income after provision for credit losses for the three years ended 2023, 2022, and 2021, respectively: Years Ended December 31, (In thousands) 2023 2022 2021 Net interest income $ 369,047 $ 344,597 $ 291,166 Provision expense/(benefit) for credit losses 31,999 11,000 (500) Net interest income after provision for credit losses 337,048 333,597 291,666 Total non-interest income 42,782 68,937 143,248 Total non-interest expense 301,508 288,716 285,893 Income before income taxes 78,322 113,818 149,021 Income tax expense 8,724 21,285 30,357 Net income 69,598 92,533 118,664

REVENUE

REVENUE	12 Months Ended
	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
REVENUE	REVENUE Revenue from contracts with customers in the scope of Topic 606 is recognized within noninterest income. The Company does not have any material significant payment terms as payment is received at or shortly after the satisfaction of the performance obligation. The value of unsatisfied performance obligations for contracts with an original expected length of one year or less are not disclosed. The Company recognizes incremental costs of obtaining contracts as an expense when incurred for contracts with a term of one year or less. Topic 606 does not apply to revenue associated with financial instruments, including revenue from loans and securities. In addition, certain non-interest income streams such as fees associated with mortgage servicing rights, financial guarantees, derivatives, and certain credit card fees are also not in scope of Topic 606. Topic 606 is applicable to non-interest revenue streams such as wealth management fees, insurance commissions and fees, administrative services for customer deposit accounts, interchange fees, and sale of owned real estate properties. The following presents non-interest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the years ended 2023, 2022, and 2021, respectively. Years Ended December 31, (In thousands) 2023 2022 2021 Non-interest income In-scope of Topic 606: Service charges on deposit accounts $ 24,160 $ 22,396 $ 20,249 Wealth management fees 10,197 10,008 10,530 Interchange income 8,395 8,470 8,321 Insurance commissions and fees — — 7,003 Non-interest income (in-scope of Topic 606) $ 42,752 $ 40,874 $ 46,103 Non-interest income (out-of-scope of Topic 606) 30 28,063 97,145 Total non-interest income $ 42,782 $ 68,937 $ 143,248 Non-interest income streams in-scope of Topic 606 are discussed below. Service Charges on Deposit Accounts. Service charges on deposit accounts consist of monthly service fees (i.e. business analysis fees and consumer service charges) and other deposit account related fees. The Company's performance obligation for monthly service fees is generally satisfied, and the related revenue recognized, over the period in which the service is provided. Other deposit account related fees are largely transactional based, and therefore, the Company's performance obligation is satisfied, and related revenue recognized, at a point in time. Payment for service charges on deposit accounts is primarily received immediately or in the following month through a direct charge to customers’ accounts. The Company may, from time to time, waive certain fees (e.g., NSF fee) for customers but generally do not reduce the transaction price to reflect variability for future reversals due to the insignificance of the amounts. Waiver of fees reduces the revenue in the period the waiver is granted to the customer. Wealth Management Fees. Wealth management fees are primarily comprised of fees earned from consultative investment management, trust administration, tax return preparation, and financial planning. The Company’s performance obligation is generally satisfied over time and the resulting fees are recognized monthly, based on the daily accrual of the market value of the investment accounts and the applicable fee rate. Interchange Fees. Interchange fees are transaction fees paid to the card-issuing bank to cover handling costs, fraud and bad debt costs, and the risk involved in approving the payment. Due to the day-to-day nature of these fees they are settled on a daily basis and are accounted for as they are received. Insurance Commissions and Fees. Commission revenue is recognized as of the effective date of the insurance policy or the date the customer is billed, whichever is later, net of return commissions related to policy cancellations. Policy cancellation is a variable consideration that is not deemed significant and thus, does not impact the amount of revenue recognized. In addition, the Company may receive additional performance commissions based on achieving certain sales and loss experience measures. Such commissions are recognized when determinable, which is generally when such commissions are received or when the Company receives data from the insurance companies that allows the reasonable estimation of these amounts. On September 1, 2021, the Company completed the sale of substantially all of the assets, and the assumption of certain liabilities, of Berkshire Insurance Group, Inc. Gains/Losses on Sales of OREO. The sale of OREO and other nonfinancial assets are accounted for with the derecognition of the asset in question once a contract exists and control of the asset has been transferred to the buyer. The gain or loss on the sale is calculated as the difference between the carrying value of the asset and the transaction price.

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2023
Accounting Policies [Abstract]
Basis of Presentation and Consolidation	Basis of Presentation and Consolidation The Consolidated Financial Statements (the “financial statements”) of Berkshire Hills Bancorp, Inc. and its subsidiaries (the “Company” or “Berkshire”) have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”). The Company is a Delaware corporation, headquartered in Boston, Massachusetts, and the holding company for Berkshire Bank (the “Bank”), a Massachusetts-chartered trust company headquartered in Pittsfield, Massachusetts. These financial statements include the accounts of the Company, its wholly-owned subsidiaries and the Bank’s consolidated subsidiaries. In consolidation, all significant intercompany accounts and transactions are eliminated. The results of operations of companies or assets acquired are included only from the dates of acquisition. All material wholly-owned and majority-owned subsidiaries are consolidated unless GAAP requires otherwise. The Company has evaluated subsequent events for potential recognition and/or disclosure through the date these financial statements were issued.
Reclassification	Reclassification Certain items in prior financial statements have been reclassified to conform to the current presentation.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the financial statements. Actual results could differ from those estimates.
Cash and Cash equivalents	Cash and Cash equivalents Cash and cash equivalents include cash, balances due from banks, and short-term investments, all of which had an original maturity within 90 days. Due to the nature of cash and cash equivalents and the near term maturity, the Company estimated that the carrying amount of such instruments approximated fair value. The nature of the Bank’s business requires that it maintain amounts due from banks which at times, may exceed federally insured limits. The Bank has not experienced any losses on such amounts and all amounts are maintained with well-capitalized institutions.
Trading Security	Trading Security The Company accounts for a tax advantaged economic development bond originated in 2008 at fair value, in accordance with Financial Accounting Standards Board’s (“FASB”) Accounting Standards Codification (“ASC”) 320. The bond has been designated as a trading account security and is recorded at fair value, with changes in unrealized gains and losses recorded through earnings each period as part of non-interest income.
Securities	Securities Debt securities that management has the intent and ability to hold to maturity are classified as held to maturity and carried at amortized cost. All other debt securities are classified as available for sale and carried at fair value, with unrealized gains and losses reported as a component of other net comprehensive income. Equity securities are carried at fair value, with changes in fair value reported in net income. Management determines the appropriate classification of securities at the time of purchase. Restricted equity securities, such as stock in the Federal Home Loan Bank of Boston (“FHLBB”) are carried at cost. There are no quoted market prices for the Company’s restricted equity securities. The Bank is a member of the FHLBB, which requires that members maintain an investment in FHLBB stock, which may be redeemed based on certain conditions. The Bank reviews for impairment based on the ultimate recoverability of the cost bases in the FHLBB stock. Purchase premiums and discounts are recognized in interest income using the interest method, without anticipating prepayments, except mortgage-backed securities where prepayments are anticipated, over the terms of the securities. Premiums on callable debt securities are amortized to their earliest call date. Gains and losses on the sale of securities are recorded on the trade date and are determined using the specific identification method. The Company measures expected credit losses on held to maturity debt securities on a collective basis. Accrued interest receivable on held to maturity debt securities is excluded from the estimate of credit losses. The estimate of expected credit losses considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts.
Loans Held for Sale	Loans Held for Sale Loans originated with the intent to be sold in the secondary market are accounted for under the fair value option. Non-refundable fees and direct loan origination costs related to residential mortgage loans held for sale are recognized in non-interest income or non-interest expense as earned or incurred. Fair value is primarily determined based on quoted prices for similar loans in active markets. Gains and losses on sales of residential mortgage loans (sales proceeds minus carrying value) are recorded in non-interest income. Loans that were previously held for investment that the Company has an active plan to sell are transferred to loans held for sale at the lower of cost or market (fair value). The market price is primarily determined based on quoted prices for similar loans in active markets or agreed upon sales prices. Gains are recorded in non-interest income at sale to the extent that the sale price of the loan exceeds carrying value. Any reduction in the loan’s value, prior to being transferred to loans held for sale, is reflected as a charge-off of the recorded investment in the loan resulting in a new cost basis, with a corresponding reduction in the allowance for credit losses. Further decreases in the fair value of the loan are recognized in non-interest expense.
Loans	Loans Loans are reported at their amortized cost. Amortized cost is the principal balance outstanding, net of the unamortized balance of any deferred fees or costs and the unamortized balance of any premiums or discounts on loans purchased or acquired through mergers. Interest income is accrued on the unpaid principal balance. Interest income includes net accretion or amortization of deferred fees or costs and of premiums or discounts. Direct loan origination costs, net of any origination fees, in addition to premiums and discounts on loans, are deferred and recognized as an adjustment of the related loan yield using the interest method. Interest on loans, excluding automobile and unsecured consumer loans, is generally not accrued on loans which are ninety days or more past due unless the loan is well-secured and in the process of collection. Past due status is based on contractual terms of the loan. Automobile and unsecured consumer loans generally continue accruing until one hundred and twenty days delinquent, at which time they are charged off. All interest accrued but not collected for loans that are placed on nonaccrual or charged-off is reversed against interest income, except for certain loans designated as well-secured. The interest on nonaccrual loans is accounted for on the cash-basis or cost-recovery method, until qualifying for return to accrual. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.
Purchase Credit Deteriorated (PCD) Loans	Purchase Credit Deteriorated ("PCD") Loans
Allowance for Credit Losses for Loans	Allowance for Credit Losses on Loans The allowance for credit losses on loans (“ACLL”) is comprised of the allowance for credit losses on loans. The ACLL is a valuation account that is deducted from the loans’ amortized cost basis to present the net amount expected to be collected on the loans. Loans are charged off against the allowance when management believes the uncollectability of a loan balance is confirmed. Accrued interest receivable is excluded from the estimate of credit losses. The level of the ACLL represents management’s estimate of expected credit losses over the expected life of the loans at the balance sheet date. The Company uses a static pool migration analysis method, applying expected historical loss trend and observed economic metrics. The level of the ACLL is based on management’s ongoing review of all relevant information, from internal and external sources, relating to past and current events, utilizing a 7 quarter reasonable and supportable forecast period with a 1 year reversion period. The ACLL reserve is overlaid with qualitative factors based upon: • the existence and growth of concentrations of credit; • the volume and severity of past due financial assets, including nonaccrual assets; • the institutions lending and credit review as well as the experience and ability of relevant management and staff and; • the effect of other external factors such as regulatory, competition, regional market conditions, legal and technological environment and other events such as natural disasters; • the effect of other economic factors such as economic stimulus and customer forbearance programs. The allowance for unfunded commitments is maintained at a level by the Company to be sufficient to absorb expected lifetime losses related to unfunded credit facilities (including unfunded loan commitments and letters of credit).) The Company’s allowance for credit losses on unfunded commitments is recognized as a liability (other liability on the Consolidated Balance Sheets), with adjustments to the reserve recognized in other noninterest expense in the Consolidated Statements of Operations. The ACLL is measured on a collective (pool) basis when similar risk characteristics exist. The Company evaluates its risk characteristics of loans based on regulatory call report code with sub-segmentation based on underlying collateral for certain loan types. Risk characteristics relevant to each portfolio segment are as follows: Construction – Loans in this segment primarily include real estate development loans for which payment is derived from sale of the property or long term financing at completion. Credit risk is affected by cost overruns, time to sell at an adequate price, and market conditions. Commercial real estate multifamily, owner occupied and non-owner – Loans in this segment are primarily owner-occupied or income-producing properties throughout New England and Northeastern New York. The underlying cash flows generated by the properties may be more adversely affected by conditions in the real estate markets or in the general economy, which in turn, will have an effect on the credit quality in this segment. Management monitors the cash flows of these loans. Commercial and industrial loans – Loans in this segment are made to businesses and are generally secured by assets of the business such as accounts receivable, inventory, marketable securities, other liquid collateral, equipment and other business assets. Repayment is expected from the cash flows of the business. Loans in this segment include asset based loans which generally have no scheduled repayment which are closely monitored against formula based collateral advance ratios. A weakened economy, and resultant decreased consumer spending, will have an effect on the credit quality of this segment. Residential real estate – All loans in this segment are collateralized by residential real estate and repayment is dependent on the credit quality of the individual borrower. The overall health of the economy, including unemployment rates and housing prices, will have an effect on the credit quality in this segment. Home equity and other consumer loans – Loans in this segment are primarily home equity lines of credit, automobile loans and other consumer loans. The overall health of the economy, including unemployment rates and housing prices, will have an effect on the credit quality in this segment. Loans that do not share risk characteristics are evaluated on an individual basis and are not also included in the collective evaluation. Estimates of specific allowance may be determined by the present value of anticipated future cash flows or the loan’s observable fair market value, or the fair value of the collateral less costs to sell, if the loan is collateral dependent. However, for collateral dependent loans, the amount of the amortized cost in a loan that exceeds the fair value of the collateral is charged-off against the allowance for credit losses on loans in lieu of an allocation of a specific allowance amount when such an amount has been identified definitively as uncollectible.
Bank-Owned Life Insurance	Bank-Owned Life Insurance Bank-owned life insurance policies are reflected on the Consolidated Balance Sheets at the amount that can be realized under the insurance contract at the balance sheet date which is the cash surrender value. Changes in the net cash surrender value of the policies, as well as insurance proceeds received, are reflected in non-interest income on the Consolidated Statements of Operations and are not subject to income taxes.
Foreclosed and Repossessed Assets	Foreclosed and Repossessed Assets Other real estate owned is comprised of real estate acquired through foreclosure proceedings or acceptance of a deed in lieu of foreclosure. Repossessed collateral is primarily comprised of taxi medallions. Both other real estate owned and repossessed collateral are held for sale and are initially recorded at the fair value less estimated costs to sell at the date of foreclosure or repossession, establishing a new cost basis. The shortfall, if any, of the loan balance over the fair value of the property or collateral (excluding taxi medallions), less cost to sell, at the time of transfer from loans to other real estate owned or repossessed collateral is charged to the allowance for credit losses on loans. Subsequent to transfer, the asset is carried at lower of cost or fair value less cost to sell and periodically evaluated for impairment. The shortfall, if any, of the loan balance over the fair value of the collateral comprised of taxi medallions at the time of transfer from loans to repossessed collateral is charged to non-interest income. Subsequent impairments in the fair value of other real estate owned and repossessed collateral are charged to expense in the period incurred. Net operating income or expense related to other real estate owned and repossessed collateral is included in operating expenses in the accompanying Consolidated Statements of Income. Because of changing market conditions, there are inherent uncertainties in the assumptions with respect to the estimated fair value of other real estate owned and repossessed collateral. Because of these inherent uncertainties, the amount ultimately realized on other real estate owned and repossessed collateral may differ from the amounts reflected in the financial statements.
Capitalized Servicing Rights	Capitalized Servicing Rights Capitalized servicing rights are included in “other assets” in the Consolidated Balance Sheets. Servicing assets are initially recognized as separate assets at fair value when rights are acquired through purchase or through sale of financial assets with servicing retained. The Company's servicing rights accounted for under the fair value method are carried on the Consolidated Balance Sheets at fair value with changes in fair value recorded in income in the period in which the change occurs. Changes in the fair value of servicing rights are primarily due to changes in valuation assumptions, such as discount rates and prepayment speeds, and the collection and realization of expected cash flows. The Company’s servicing rights accounted for under the amortization method are initially recorded at fair value. Under that method, capitalized servicing rights are charged to expense in proportion to and over the period of estimated net servicing income. Fair value of the servicing rights is based on a valuation model that calculates the present value of estimated future net servicing income. The valuation model incorporates assumptions that market participants would use in estimating future net servicing income, such as the cost to service, the discount rate, prepayment speeds and default rates and losses. Impairment is recognized through a valuation allowance for an individual tranche, to the extent that fair value is less than the capitalized amount for the tranches. If the Company later determines that all or a portion of the impairment no longer exists for a particular tranche, a reduction of the allowance may be recorded as an increase to income.
Premises and Equipment	Premises and Equipment Land is carried at cost. Buildings, improvements, and equipment are carried at cost less accumulated depreciation and amortization computed on the straight-line method over the estimated useful lives of the assets. Leasehold improvements are amortized on the straight-line method over the shorter of the lease term, plus optional terms if certain conditions are met, or the estimated useful life of the asset.
Other Intangibles	Other Intangibles Intangible assets are acquired assets that lack physical substance but can be distinguished from goodwill because of contractual or other legal rights or the asset is capable of being sold or exchanged either on its own or in combination with a related contract, asset or liability. The fair values of these assets are generally determined based on appraisals and are subsequently amortized on a straight-line basis or an accelerated basis over their estimated lives. Management assesses the recoverability of these intangible assets at least annually or whenever events or changes in circumstances indicate that their carrying value may not be recoverable. If the carrying amount exceeds fair value, an impairment charge is recorded to income.
Transfers of Financial Assets	Transfers of Financial Assets Transfers of an entire financial asset, group of entire financial assets, or a participating interest in an entire financial asset are accounted for as sales when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (1) the assets have been isolated from the Company, (2) the transferee obtains the right to pledge or exchange the transferred assets, and (3) the Company does not maintain effective control over the transferred assets.
Income Taxes	Income Taxes Deferred income taxes are recognized for the tax consequences of temporary differences by applying enacted statutory tax rates applicable for future years to differences between financial statement and tax bases of existing assets and liabilities. The effect of tax rate changes on deferred taxes is recognized in the income tax provision in the period that includes the enactment date. A tax valuation allowance is established, as needed, to reduce net deferred tax assets to the amount expected to be realized. In the event it becomes more likely than not that some or all of the deferred tax asset allowances will not be needed, the valuation allowance will be adjusted. In the ordinary course of business there is inherent uncertainty in quantifying the Company’s income tax positions. Income tax positions and recorded tax benefits are based upon management’s evaluation of the facts, circumstances, and information available at the reporting date. For those tax positions where it is more likely than not that a tax benefit will be sustained, we have determined the amount of the tax benefit to be recognized by estimating the largest amount of tax benefit that has a greater than 50% likelihood of being realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant information. For those income tax positions where it is more-likely-than-not that a tax benefit will not be sustained, no tax benefit has been recognized in the financial statements. Where applicable, associated interest and penalties have also been recognized. We recognize accrued interest and penalties related to unrecognized tax benefits as a component of income tax expense.
Insurance Commissions	Insurance Commissions Commission revenue is recognized as of the effective date of the insurance policy or the date the customer is billed, whichever is later, net of return commissions related to policy cancellations. Policy cancellation is a variable consideration that is not deemed significant and thus, does not impact the amount of revenue recognized. In addition, the Company may receive additional performance commissions based on achieving certain sales and loss experience measures. Such commissions are recognized when determinable, which is generally when such commissions are received or when the Company receives data from the insurance companies that allows the reasonable estimation of these amounts. Revenue from contracts with customers in the scope of Topic 606 is recognized within noninterest income. The Company does not have any material significant payment terms as payment is received at or shortly after the satisfaction of the performance obligation. The value of unsatisfied performance obligations for contracts with an original expected length of one year or less are not disclosed. The Company recognizes incremental costs of obtaining contracts as an expense when incurred for contracts with a term of one year or less. Topic 606 does not apply to revenue associated with financial instruments, including revenue from loans and securities. In addition, certain non-interest income streams such as fees associated with mortgage servicing rights, financial guarantees, derivatives, and certain credit card fees are also not in scope of Topic 606. Topic 606 is applicable to non-interest revenue streams such as wealth management fees, insurance commissions and fees, administrative services for customer deposit accounts, interchange fees, and sale of owned real estate properties. The following presents non-interest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the years ended 2023, 2022, and 2021, respectively. Years Ended December 31, (In thousands) 2023 2022 2021 Non-interest income In-scope of Topic 606: Service charges on deposit accounts $ 24,160 $ 22,396 $ 20,249 Wealth management fees 10,197 10,008 10,530 Interchange income 8,395 8,470 8,321 Insurance commissions and fees — — 7,003 Non-interest income (in-scope of Topic 606) $ 42,752 $ 40,874 $ 46,103 Non-interest income (out-of-scope of Topic 606) 30 28,063 97,145 Total non-interest income $ 42,782 $ 68,937 $ 143,248 Non-interest income streams in-scope of Topic 606 are discussed below. Service Charges on Deposit Accounts. Service charges on deposit accounts consist of monthly service fees (i.e. business analysis fees and consumer service charges) and other deposit account related fees. The Company's performance obligation for monthly service fees is generally satisfied, and the related revenue recognized, over the period in which the service is provided. Other deposit account related fees are largely transactional based, and therefore, the Company's performance obligation is satisfied, and related revenue recognized, at a point in time. Payment for service charges on deposit accounts is primarily received immediately or in the following month through a direct charge to customers’ accounts. The Company may, from time to time, waive certain fees (e.g., NSF fee) for customers but generally do not reduce the transaction price to reflect variability for future reversals due to the insignificance of the amounts. Waiver of fees reduces the revenue in the period the waiver is granted to the customer. Wealth Management Fees. Wealth management fees are primarily comprised of fees earned from consultative investment management, trust administration, tax return preparation, and financial planning. The Company’s performance obligation is generally satisfied over time and the resulting fees are recognized monthly, based on the daily accrual of the market value of the investment accounts and the applicable fee rate. Interchange Fees. Interchange fees are transaction fees paid to the card-issuing bank to cover handling costs, fraud and bad debt costs, and the risk involved in approving the payment. Due to the day-to-day nature of these fees they are settled on a daily basis and are accounted for as they are received. Insurance Commissions and Fees. Commission revenue is recognized as of the effective date of the insurance policy or the date the customer is billed, whichever is later, net of return commissions related to policy cancellations. Policy cancellation is a variable consideration that is not deemed significant and thus, does not impact the amount of revenue recognized. In addition, the Company may receive additional performance commissions based on achieving certain sales and loss experience measures. Such commissions are recognized when determinable, which is generally when such commissions are received or when the Company receives data from the insurance companies that allows the reasonable estimation of these amounts. On September 1, 2021, the Company completed the sale of substantially all of the assets, and the assumption of certain liabilities, of Berkshire Insurance Group, Inc. Gains/Losses on Sales of OREO. The sale of OREO and other nonfinancial assets are accounted for with the derecognition of the asset in question once a contract exists and control of the asset has been transferred to the buyer. The gain or loss on the sale is calculated as the difference between the carrying value of the asset and the transaction price.
Stock-Based Compensation	Stock-Based Compensation The Company measures and recognizes compensation cost relating to share-based payment transactions based on the grant-date fair value of the equity instruments issued. The fair value of restricted stock is recorded as unearned compensation. The deferred expense is amortized to compensation expense based on one of several permitted attribution methods over the longer of the required service period or performance period. For performance-based restricted stock awards, the Company estimates the degree to which performance conditions will be met to determine the number of shares that will vest and the related compensation expense. Compensation expense is adjusted in the period such estimates change. Income tax benefits and/or tax deficiencies related to stock compensation determined as the difference between compensation cost recognized for financial reporting purposes and the deduction for tax, are recognized in the income statement as income tax expense or benefit in the period in which they occur.
Wealth Management	Wealth Management Wealth management assets held in a fiduciary or agent capacity are not included in the accompanying Consolidated Balance Sheets because they are not assets of the Company. Wealth management fees is primarily comprised of fees earned from consultative investment management, trust administration, tax return preparation, and financial planning. The Company’s performance obligation is generally satisfied over time and the resulting fees are recognized monthly, based on the daily accrual of the market value of the investment accounts and the applicable fee rate.
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities The Company enters into interest rate swap agreements as part of the Company’s interest rate risk management strategy for certain assets and liabilities and not for speculative purposes. Based on the Company’s intended use for the interest rate swap at inception, the Company designates the derivative as either an economic hedge of an asset or liability or a hedging instrument subject to the hedge accounting provisions of ASC 815, “Derivatives and Hedging.” Interest rate swaps designated as economic hedges are recorded at fair value within other assets or liabilities. Changes in the fair value of these derivatives are recorded directly through earnings. For interest rate swaps that management intends to apply the hedge accounting provisions of ASC 815, the Company formally documents at inception all relationships between hedging instruments and hedged items, as well as its risk management objectives and strategies for undertaking the various hedges. Additionally, the Company uses dollar offset or regression analysis at the hedge’s inception and for each reporting period thereafter, to assess whether the derivative used in its hedging transaction is expected to be and has been highly effective in offsetting changes in the fair value or cash flows of the hedged item. The Company discontinues hedge accounting when it is determined that a derivative is not expected to be or has ceased to be highly effective as a hedge, and then reflects changes in fair value of the derivative in earnings after termination of the hedge relationship. The Company enters into commitments to lend with borrowers, and forward commitments to sell loans or to-be-announced mortgage-backed bonds to investors to hedge against the inherent interest rate and pricing risk associated with selling loans. The commitments to lend generally terminate once the loan is funded, the lock period expires or the borrower decides not to contract for the loan. The forward commitments generally terminate once the loan is sold, the commitment period expires or the borrower decides not to contract for the loan. These commitments are considered derivatives which are accounted for by recognizing their estimated fair value on the Consolidated Balance Sheets as either a freestanding asset or liability. See Note 14 - Derivative Instruments and Hedging Activities to the financial statements for more information on commitments to lend and forward commitments.
Off-Balance Sheet Financial Instruments	Off-Balance Sheet Financial Instruments In the ordinary course of business, the Company enters into off-balance sheet financial instruments, consisting primarily of credit related financial instruments. These financial instruments are recorded in the financial statements when they are funded or related fees are incurred or received.
Fair Value Hierarchy	Fair Value Hierarchy The Company groups assets and liabilities that are measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. Level 1 - Valuation is based on quoted prices in active markets for identical assets or liabilities. Valuations are obtained from readily available pricing sources for market transactions involving identical assets or liabilities. Level 2 - Valuation is based on observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 - Valuation is based on unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using unobservable techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation.
Employee Benefits	Employee Benefits The Company maintains an employer sponsored 401(k) plan to which participants may make contributions in the form of salary deferrals and the Company provides matching contributions in accordance with the terms of the plan. Contributions due under the terms of the defined contribution plans are accrued as earned by employees. Due to the Rome Bancorp acquisition in 2011, the Company inherited a noncontributory, qualified, defined benefit pension plan for certain employees who met age and service requirements; as well as other post-retirement benefits, principally health care and group life insurance. The Rome pension plan and postretirement benefits that were acquired in connection with the whole-bank acquisition were frozen prior to the close of the transaction. The pension benefit in the form of a life annuity is based on the employee’s combined years of service, age, and compensation. The Company also has a long-term care post-retirement benefit plan for certain executives where upon disability, associated benefits are funded by insurance policies or paid directly by the Company. In order to measure the expense associated with the Plans, various assumptions are made including the discount rate, expected return on plan assets, anticipated mortality rates, and expected future healthcare costs. The assumptions are based on historical experience as well as current facts and circumstances. The Company uses a December 31 measurement date for its plans. As of the measurement date, plan assets are determined based on fair value, generally representing observable market prices. The projected benefit obligation is primarily determined based on the present value of projected benefit distributions at an assumed discount rate. Net periodic pension benefit costs include interest costs based on an assumed discount rate, the expected return on plan assets based on actuarially derived market-related values, and the amortization of net actuarial losses. Net periodic postretirement benefit costs include service costs, interest costs based on an assumed discount rate, and the amortization of prior service credits and net actuarial gains. Differences between expected and actual results in each year are included in the net actuarial gain or loss amount, which is recognized in other comprehensive income. The net actuarial gain or loss in excess of a 10% corridor is amortized in net periodic benefit cost over the average remaining service period of active participants in the Plans. The prior service credit is amortized over the average remaining service period to full eligibility for participating employees expected to receive benefits. The Company recognizes in its consolidated balance sheets an asset for a plan’s overfunded status or a liability for a plan’s underfunded status. The Company also measures the Plans’ assets and obligations that determine its funded status as of the end of the fiscal year and recognizes those changes in other comprehensive income/(loss), net of tax. Due to the SI Financial acquisition in 2019, the Company inherited a tax-qualified defined benefit pension plan. The plan was frozen effective September 6, 2013. The plan is a single plan under the Internal Revenue Code and, as a result, all of the assets stand behind all of liabilities. Accordingly, contributions made by a participating employer may be used to provide benefits to participants of other participating employers.
Operating Segments	Operating Segments The Company operates as one consolidated reportable segment. The chief operating decision-maker evaluates consolidated results and makes decisions for resource allocation on this same data. Management periodically reviews and redefines its segment reporting as internal reporting practices evolve and components of the business change. The financial statements reflect the financial results of the Company's one reportable operating segment.
Recently Adopted Accounting Principles and Future Application of Accounting Pronouncements	Recently Adopted Accounting Principles Effective January 1, 2023, the Company adopted ASU No. 2022-02, “Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures.” The adoption did not have a material impact on the Company’s Consolidated Financial Statements. The ASU eliminates the troubled debt restructuring (“TDR”) accounting model that was adopted with Topic 326, “Financial Instruments – Credit Losses” and enhances disclosure requirements for certain loan refinancings and restructurings when a borrower is experiencing financial difficulty. The ASU requires prospective disclosure of current-period gross write-offs by year of origination. Refer to Note 5 – Loans and Related Allowance for Credit Losses for the new financial statement disclosures applicable under this update. Future Application of Accounting Pronouncements In March 2023, the FASB issued ASU No. 2023-02, “Investments – Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method (a consensus of the Emerging Issues Task Force).” The guidance is intended to improve the accounting and disclosures for investments in tax credit structures. The ASU allows entities to elect to account for qualifying tax equity investments using the proportional amortization method, regardless of the program giving rise to the related income tax credits. Previously, this method was only available for qualifying investments in low-income housing tax credit structures. The amendments in this ASU are effective for fiscal years beginning after December 15, 2023, and interim periods within those fiscal years. Early adoption is permitted. The Company is still evaluating; however, the adoption removes amortization expense from non-interest income and moves to tax expense resulting in an increase to the effective tax rate. In December 2023, the FASB issued ASU No. 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures.” The ASU requires disclosure in the rate reconciliation table of additional categories of information and more details about the reconciling items in some categories if items meet a quantitative threshold. The ASU also requires all entities to disclose income taxes paid, net of refunds, disaggregated by federal, state and foreign taxes for annual periods and to disaggregate the information by jurisdiction based on a quantitative threshold, among other things. The amendments in this ASU are effective for annual periods beginning after December 15, 2024. Early adoption is permitted. The Company is still evaluating; however, the adoption is not expected to have a material impact on the Company’s Consolidated Financial Statements.

SECURITIES (Tables)

SECURITIES (Tables)	12 Months Ended
	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Schedule of Securities Available for Sale (AFS) and Securities	The following is a summary of securities available for sale (“AFS”) , held to maturity (“HTM”), and marketable equity securities: (In thousands) Amortized Gross Gross Fair Value Allowance December 31, 2023 Securities available for sale Debt securities: U.S Treasuries $ 7,980 $ 1 $ — $ 7,981 $ — Municipal bonds and obligations 64,788 494 (1,429) 63,853 — Agency collateralized mortgage obligations 426,986 — (79,112) 347,874 — Agency mortgage-backed securities 492,633 2 (75,155) 417,480 — Agency commercial mortgage-backed securities 174,879 — (29,553) 145,326 — Corporate bonds 43,291 34 (4,210) 39,115 — Other bonds and obligations 655 67 (66) 656 — Total securities available for sale 1,211,212 598 (189,525) 1,022,285 — Securities held to maturity Municipal bonds and obligations 251,046 698 (16,987) 234,757 48 Agency collateralized mortgage obligations 112,929 — (18,360) 94,569 — Agency mortgage-backed securities 47,379 — (8,052) 39,327 — Agency commercial mortgage-backed securities 130,169 — (24,368) 105,801 — Tax advantaged economic development bonds 1,540 6 (60) 1,486 20 Other bonds and obligations 288 — — 288 — Total securities held to maturity 543,351 704 (67,827) 476,228 68 Marketable equity securities 15,035 — (2,006) 13,029 — Total $ 1,769,598 $ 1,302 $ (259,358) $ 1,511,542 $ 68 December 31, 2022 Securities available for sale Debt securities: U.S Treasuries $ 11,972 $ 1 $ — $ 11,973 $ — Municipal bonds and obligations 65,943 422 (3,030) 63,335 — Agency collateralized mortgage obligations 631,732 — (99,787) 531,945 — Agency mortgage-backed securities 643,308 1 (96,996) 546,313 — Agency commercial mortgage-backed securities 264,218 — (35,750) 228,468 — Corporate bonds 43,368 80 (2,938) 40,510 — Other bonds and obligations 655 67 (66) 656 — Total securities available for sale 1,661,196 571 (238,567) 1,423,200 — Securities held to maturity Municipal bonds and obligations 266,793 691 (23,704) 243,780 66 Agency collateralized mortgage-backed securities 128,136 — (20,420) 107,716 — Agency mortgage-backed securities 50,958 — (9,240) 41,718 — Agency commercial mortgage-backed securities 135,206 — (23,203) 112,003 — Tax advantaged economic development bonds 2,069 8 (121) 1,956 25 Other bonds and obligations 291 — — 291 — Total securities held to maturity 583,453 699 (76,688) 507,464 91 Marketable equity securities 15,035 — (2,179) 12,856 — Total $ 2,259,684 $ 1,270 $ (317,434) $ 1,943,520 $ 91
Schedule of Debt Securities, Held to Maturity, Activity	The following table summarizes the activity in the allowance for credit losses for debt securities held to maturity by security type for the years ended December 31, 2023, 2022 and 2021: (In thousands) Municipal bonds and obligations Tax advantaged economic development bonds Total Balance at December 31, 2022 $ 66 $ 25 $ 91 Provision (benefit) for credit losses (18) (5) (23) Balance at December 31, 2023 $ 48 $ 20 $ 68 (In thousands) Municipal bonds and obligations Tax advantaged economic development bonds Total Balance at December 31, 2021 $ 70 $ 35 $ 105 Provision (benefit) for credit losses (4) (10) (14) Balance at December 31, 2022 $ 66 $ 25 $ 91 (In thousands) Municipal bonds and obligations Tax advantaged economic development bonds Total Balance at December 31, 2020 $ 64 $ 40 $ 104 Provision expense/(benefit) for credit losses 6 (5) 1 Balance at December 31, 2021 $ 70 $ 35 $ 105
Schedule of Amortized Cost and Estimated Fair Value of Available for Sale (AFS) and Held to Maturity (HTM) Securities, Segregated by Contractual Maturity	The amortized cost and estimated fair value of AFS and HTM securities, segregated by contractual maturity at year-end 2023 are presented below. Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations. Mortgage-backed securities and collateralized mortgage obligations are shown in total, as their maturities are highly variable. Available for sale Held to maturity (In thousands) Amortized Fair Amortized Fair Within 1 year $ 8,290 $ 8,292 $ 410 $ 410 Over 1 year to 5 years 11,205 11,083 1,802 1,797 Over 5 years to 10 years 55,843 51,922 35,956 35,883 Over 10 years 41,376 40,308 214,706 198,441 Total bonds and obligations 116,714 111,605 252,874 236,531 Mortgage-backed securities 1,094,498 910,680 290,477 239,697 Total $ 1,211,212 $ 1,022,285 $ 543,351 $ 476,228
Schedule of Amortized Cost and Fair Values of Pledged Securities	The total amortized cost and fair values of these pledged securities follows. Additionally, there is a blanket lien on certain securities to collateralize borrowings from the FHLBB and Federal Reserve Bank of Boston, as discussed further in Note 10 - Borrowed Funds. 2023 2022 (In thousands) Amortized Fair Amortized Fair Securities pledged to swap counterparties $ 9,780 $ 9,633 $ 11,972 $ 11,973 Securities pledged for municipal deposits 289,740 250,979 304,741 276,804 Total $ 299,520 $ 260,612 $ 316,713 $ 288,777
Schedule of Components of Net Realized Gains and Losses on the Sale of AFS Securities	The components of net recognized gains and losses on the sale of AFS securities and the fair value change of marketable equities are as follows: (In thousands) 2023 2022 2021 Gross recognized gains $ 1,199 $ 72 $ 108 Gross recognized losses (26,083) (2,009) (550) Net recognized (losses) $ (24,884) $ (1,937) $ (442)
Schedule of Securities with Unrealized Losses, Segregated by the Duration of their Continuous Unrealized Loss Positions	Debt securities with unrealized losses, segregated by the duration of their continuous unrealized loss positions, are summarized as follows: Less Than Twelve Months Over Twelve Months Total (In thousands) Gross Fair Gross Fair Gross Fair December 31, 2023 Securities available for sale Debt securities: Municipal bonds and obligations $ 76 $ 9,326 $ 1,353 $ 22,739 $ 1,429 $ 32,065 Agency collateralized mortgage obligations — — 79,112 347,874 79,112 347,874 Agency mortgage-backed securities 1 22 75,154 417,151 75,155 417,173 Agency commercial mortgage-back securities — — 29,553 145,326 29,553 145,326 Corporate bonds 457 6,543 3,753 31,690 4,210 38,233 Other bonds and obligations — — 66 295 66 295 Total securities available for sale $ 534 $ 15,891 $ 188,991 $ 965,075 $ 189,525 $ 980,966 Securities held to maturity Municipal bonds and obligations 229 28,895 16,758 92,063 16,987 120,958 Agency collateralized mortgage obligations 1 21 18,359 94,548 18,360 94,569 Agency mortgage-backed securities — — 8,052 39,327 8,052 39,327 Agency commercial mortgage-back securities — — 24,368 105,801 24,368 105,801 Tax advantaged economic development bonds — — 60 922 60 922 Total securities held to maturity 230 28,916 67,597 332,661 67,827 361,577 Total $ 764 $ 44,807 $ 256,588 $ 1,297,736 $ 257,352 $ 1,342,543 December 31, 2022 Securities available for sale Debt securities: Municipal bonds and obligations $ 2,406 $ 36,696 $ 624 $ 2,763 $ 3,030 $ 39,459 Agency collateralized mortgage obligations 23,052 247,509 76,735 284,434 99,787 531,943 Agency mortgage-backed securities 3,124 37,540 93,872 508,683 96,996 546,223 Agency commercial mortgage-backed securities 9,885 96,396 25,865 132,043 35,750 228,439 Corporate bonds 1,709 25,657 1,229 9,929 2,938 35,586 Other bonds and obligations — — 66 295 66 295 Total securities available for sale $ 40,176 $ 443,798 $ 198,391 $ 938,147 $ 238,567 $ 1,381,945 Securities held to maturity Municipal bonds and obligations 5,476 125,494 18,228 38,341 23,704 163,835 Agency collateralized mortgage obligations 2,734 49,539 17,686 58,177 20,420 107,716 Agency mortgage-backed securities 300 2,419 8,940 39,299 9,240 41,718 Agency commercial mortgage-back securities 447 9,713 22,756 102,290 23,203 112,003 Tax advantaged economic development bonds 1 142 120 1,008 121 1,150 Total securities held to maturity 8,958 187,307 67,730 239,115 76,688 426,422 Total $ 49,134 $ 631,105 $ 266,121 $ 1,177,262 $ 315,255 $ 1,808,367

LOANS AND RELATED ALLOWANCE F_2

LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES (Tables)	12 Months Ended
	Dec. 31, 2023
Credit Loss [Abstract]
Schedule of Loans	The following is a summary of total loans by regulatory call report code with sub-segmentation based on underlying collateral for certain loan types: (In thousands) December 31, 2023 December 31, 2022 Construction $ 640,371 $ 319,452 Commercial multifamily 599,145 620,088 Commercial real estate owner occupied 628,646 640,489 Commercial real estate non-owner occupied 2,606,409 2,496,237 Commercial and industrial 1,359,249 1,445,236 Residential real estate 2,760,312 2,312,447 Home equity 224,223 227,450 Consumer other 221,331 273,910 Total loans $ 9,039,686 $ 8,335,309 Allowance for credit losses 105,357 96,270 Net loans $ 8,934,329 $ 8,239,039
Schedule of Allowance for Credit Losses for Loans, Activity	The Company’s activity in the allowance for credit losses on loans for the years ended December 31, 2023, December 31, 2022 and December 31, 2021 was as follows: (In thousands) Balance at Beginning of Period Adoption of Charge-offs Recoveries Provision for Credit Losses Balance at End of Period Year ended December 31, 2023 Construction $ 1,227 $ — $ (1) $ — $ 1,659 $ 2,885 Commercial multifamily 1,810 — — 6 659 2,475 Commercial real estate owner occupied 10,739 24 (489) 1,139 (1,970) 9,443 Commercial real estate non-owner occupied 30,724 — (65) 204 7,358 38,221 Commercial and industrial 18,743 (23) (17,872) 2,659 15,095 18,602 Residential real estate 18,666 2 (313) 610 657 19,622 Home equity 2,173 — (88) 519 (589) 2,015 Consumer other 12,188 (404) (10,429) 1,586 9,153 12,094 Total allowance for credit losses $ 96,270 $ (401) $ (29,257) $ 6,723 $ 32,022 $ 105,357 (In thousands) Balance at Beginning of Period Charge-offs Recoveries Provision for Credit Losses Balance at End of Period Year ended December 31, 2022 Construction $ 3,206 $ — $ — $ (1,979) $ 1,227 Commercial multifamily 6,120 (94) 112 (4,328) 1,810 Commercial real estate owner occupied 12,752 (687) 702 (2,028) 10,739 Commercial real estate non-owner occupied 32,106 (5,894) 1,549 2,963 30,724 Commercial and industrial 22,584 (18,447) 3,050 11,556 18,743 Residential real estate 22,406 (555) 1,019 (4,204) 18,666 Home equity 4,006 (166) 283 (1,950) 2,173 Consumer other 2,914 (2,215) 505 10,984 12,188 Total allowance for credit losses $ 106,094 $ (28,058) $ 7,220 $ 11,014 $ 96,270 (In thousands) Balance at Beginning of Period Charge-offs Recoveries Provision for Credit Losses Balance at End of Period Year ended December 31, 2021 Construction $ 5,111 $ — $ — $ (1,905) $ 3,206 Commercial multifamily 5,916 (404) 157 451 $ 6,120 Commercial real estate owner occupied 12,380 (1,640) 204 1,808 $ 12,752 Commercial real estate non-owner occupied 35,850 (14,557) 2,522 8,291 $ 32,106 Commercial and industrial 25,013 (10,841) 4,565 3,847 $ 22,584 Residential real estate 28,491 (1,664) 1,767 (6,188) $ 22,406 Home equity 6,482 (334) 335 (2,477) $ 4,006 Consumer other 8,059 (1,578) 761 (4,328) 2,914 Total allowance for credit losses $ 127,302 $ (31,018) $ 10,311 $ (501) $ 106,094
Schedule of Allowance for Credit Losses on Unfunded Loan Commitments, Activity	The Company’s activity in the allowance for credit losses on unfunded commitments for the years ended December 31, 2023, December 31, 2022, and December 31, 2021 was as follows: (In thousands) Total Balance at December 31, 2022 $ 8,588 Expense for credit losses 668 Balance at December 31, 2023 $ 9,256 (In thousands) Total Balance at December 31, 2021 $ 7,043 Release of expense for credit losses 1,545 Balance at December 31, 2022 $ 8,588 (In thousands) Total Balance at December 31, 2020 $ 7,629 Release of expense for credit losses (586) Balance at December 31, 2021 $ 7,043
Schedule of Loans by Risk Rating	The following table presents the Company’s loans by risk category: Term Loans Amortized Cost Basis by Origination Year (In thousands) 2023 2022 2021 2020 2019 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total As of December 31, 2023 Construction Current period gross write-offs $ — $ — $ — $ — $ — $ 1 $ — $ — $ 1 Risk rating Pass $ 104,507 $ 346,419 $ 138,802 $ 29,176 $ 2,545 $ 1,098 $ — $ — $ 622,547 Special Mention — — 512 — — — — — 512 Substandard — — 17,312 — — — — — 17,312 Total $ 104,507 $ 346,419 $ 156,626 $ 29,176 $ 2,545 $ 1,098 $ — $ — $ 640,371 Commercial multifamily: Current period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Risk rating Pass $ 16,020 $ 216,477 $ 56,817 $ 26,566 $ 94,733 $ 179,923 $ 377 $ — $ 590,913 Special Mention — — — — — — — — — Substandard — — 242 2,554 — 5,436 — — 8,232 Total $ 16,020 $ 216,477 $ 57,059 $ 29,120 $ 94,733 $ 185,359 $ 377 $ — $ 599,145 Commercial real estate owner occupied: Current period gross write-offs $ — $ — $ — $ 380 $ — $ 109 $ — $ — $ 489 Risk rating Pass $ 97,271 $ 120,327 $ 122,151 $ 37,914 $ 70,393 $ 165,224 $ 2,653 $ — $ 615,933 Special Mention — — 424 222 — 788 — — 1,434 Substandard — — 81 47 4,703 6,448 — — 11,279 Total $ 97,271 $ 120,327 $ 122,656 $ 38,183 $ 75,096 $ 172,460 $ 2,653 $ — $ 628,646 Commercial real estate non-owner occupied: Current period gross write-offs $ — $ — $ — $ — $ — $ 65 $ — $ — $ 65 Risk rating Pass $ 404,687 $ 591,897 $ 385,247 $ 135,134 $ 277,870 $ 736,566 $ 4,553 $ — $ 2,535,954 Special Mention — — — 229 19,465 726 — — 20,420 Substandard — — — 6,814 13,483 29,738 — — 50,035 Total $ 404,687 $ 591,897 $ 385,247 $ 142,177 $ 310,818 $ 767,030 $ 4,553 $ — $ 2,606,409 Commercial and industrial: Current period gross write-offs $ — $ 1,154 $ 863 $ 2,763 $ 1,496 $ 9,283 $ 2,313 $ — $ 17,872 Risk rating Pass $ 142,946 $ 203,126 $ 118,191 $ 69,722 $ 39,437 $ 112,770 $ 554,153 $ — $ 1,240,345 Special Mention 526 23,149 3,735 1,621 610 1,353 35,244 — 66,238 Substandard 432 761 11,702 1,135 3,785 12,538 22,313 — 52,666 Total $ 143,904 $ 227,036 $ 133,628 $ 72,478 $ 43,832 $ 126,661 $ 611,710 $ — $ 1,359,249 Term Loans Amortized Cost Basis by Origination Year (In thousands) 2023 2022 2021 2020 2019 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total Residential real estate Current period gross write-offs $ — $ 50 $ — $ 50 $ 174 $ 39 $ — $ — $ 313 Risk rating Pass $ 599,124 $ 973,031 $ 266,055 $ 88,302 $ 66,837 $ 755,372 $ 81 $ — $ 2,748,802 Special Mention — — — — 140 664 — — 804 Substandard — 129 1,176 379 574 8,448 — — 10,706 Total $ 599,124 $ 973,160 $ 267,231 $ 88,681 $ 67,551 $ 764,484 $ 81 $ — $ 2,760,312 Term Loans Amortized Cost Basis by Origination Year (In thousands) 2022 2021 2020 2019 2018 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total As of December 31, 2022 Construction Risk rating Pass $ 153,393 $ 133,708 $ 25,634 $ 3,432 $ 1,361 $ 1,924 $ — $ — $ 319,452 Special Mention — — — — — — — — — Substandard — — — — — — — — — Total $ 153,393 $ 133,708 $ 25,634 $ 3,432 $ 1,361 $ 1,924 $ — $ — $ 319,452 Commercial multifamily: Risk rating Pass $ 205,124 $ 61,032 $ 27,583 $ 100,696 $ 67,675 $ 149,633 $ 205 $ — $ 611,948 Special Mention — — 2,628 — — — — — 2,628 Substandard — — — — 5,512 — — — 5,512 Total $ 205,124 $ 61,032 $ 30,211 $ 100,696 $ 73,187 $ 149,633 $ 205 $ — $ 620,088 Commercial real estate owner occupied: Risk rating Pass $ 131,096 $ 127,270 $ 58,835 $ 82,576 $ 75,322 $ 154,056 $ 3,464 $ — $ 632,619 Special Mention — — 387 — — — — — 387 Substandard 1,003 122 31 282 1,056 4,989 — — 7,483 Total $ 132,099 $ 127,392 $ 59,253 $ 82,858 $ 76,378 $ 159,045 $ 3,464 $ — $ 640,489 Commercial real estate non-owner occupied: Risk rating Pass $ 621,685 $ 410,359 $ 175,456 $ 333,783 $ 313,124 $ 530,322 $ 17,846 $ — $ 2,402,575 Special Mention — — — — 20,000 18,462 — — 38,462 Substandard — — 7,237 13,623 15,610 18,730 — — 55,200 Total $ 621,685 $ 410,359 $ 182,693 $ 347,406 $ 348,734 $ 567,514 $ 17,846 $ — $ 2,496,237 Commercial and industrial: Risk rating Pass $ 282,781 $ 147,070 $ 56,880 $ 67,975 $ 83,223 $ 99,367 $ 648,956 $ — $ 1,386,252 Special Mention — 5,811 1,290 1,332 11,502 912 2,632 — 23,479 Substandard 204 496 3,640 8,139 1,981 2,799 10,581 — 27,840 Doubtful — — — — — 56 7,609 — 7,665 Total $ 282,985 $ 153,377 $ 61,810 $ 77,446 $ 96,706 $ 103,134 $ 669,778 $ — $ 1,445,236 Residential real estate Risk rating Pass $ 997,981 $ 280,308 $ 96,548 $ 70,845 $ 138,894 $ 713,744 $ 165 $ — $ 2,298,485 Special Mention — 364 — 861 202 707 — — 2,134 Substandard — 284 448 267 1,857 8,972 — — 11,828 Total $ 997,981 $ 280,956 $ 96,996 $ 71,973 $ 140,953 $ 723,423 $ 165 $ — $ 2,312,447 For home equity and consumer other loan portfolio segments, Berkshire evaluates credit quality based on the aging status of the loan and by payment activity. The performing or nonperforming status is updated on an ongoing basis dependent upon improvement and deterioration in credit quality. The following table presents the amortized cost based on payment activity: Term Loans Amortized Cost Basis by Origination Year (In thousands) 2023 2022 2021 2020 2019 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total As of December 31, 2023 Home equity: Current period gross write-offs $ — $ — $ — $ 70 $ — $ — $ 18 $ — $ 88 Payment performance Performing $ — $ — $ — $ 439 $ — $ 2,614 $ 220,209 $ — $ 223,262 Nonperforming — — — — — — 961 — 961 Total $ — $ — $ — $ 439 $ — $ 2,614 $ 221,170 $ — $ 224,223 Consumer other: Current period gross write-offs $ 109 $ 8,843 $ 1,149 $ 11 $ 78 $ 239 $ — $ — $ 10,429 Payment performance Performing $ 49,588 $ 108,284 $ 19,679 $ 5,843 $ 7,054 $ 19,587 $ 10,614 $ — $ 220,649 Nonperforming 77 104 47 26 110 284 34 — 682 Total $ 49,665 $ 108,388 $ 19,726 $ 5,869 $ 7,164 $ 19,871 $ 10,648 $ — $ 221,331 Term Loans Amortized Cost Basis by Origination Year (In thousands) 2022 2021 2020 2019 2018 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total As of December 31, 2022 Home equity: Payment performance Performing $ — $ 114 $ 454 $ — $ — $ 17 $ 224,746 $ — $ 225,331 Nonperforming — — — — — — 2,119 — 2,119 Total $ — $ 114 $ 454 $ — $ — $ 17 $ 226,865 $ — $ 227,450 Consumer other: Payment performance Performing $ 161,157 $ 28,279 $ 8,312 $ 12,670 $ 27,608 $ 24,682 $ 9,070 $ — $ 271,778 Nonperforming 588 137 44 280 477 567 39 — 2,132 Total $ 161,745 $ 28,416 $ 8,356 $ 12,950 $ 28,085 $ 25,249 $ 9,109 $ — $ 273,910 The following table summarizes information about total loans rated Special Mention or lower at December 31, 2023 and December 31, 2022. The table below includes consumer loans that are Special Mention and Substandard accruing that are classified as performing based on payment activity. (In thousands) December 31, 2023 December 31, 2022 Nonaccrual $ 21,407 $ 31,114 Substandard Accruing 131,689 88,665 Total Classified 153,096 119,779 Special Mention 91,502 68,127 Total Criticized $ 244,598 $ 187,906
Schedule of Past Due Loans	The following is a summary of loans by past due status at December 31, 2023 and December 31, 2022: (In thousands) 30-59 Days Past Due 60-89 Days Past Due 90 Days or Greater Past Due Total Past Due Current Total Loans December 31, 2023 Construction $ — $ — $ — $ — $ 640,371 $ 640,371 Commercial multifamily 5,436 187 — 5,623 593,522 599,145 Commercial real estate owner occupied 581 286 804 1,671 626,975 628,646 Commercial real estate non-owner occupied 139 251 3,798 4,188 2,602,221 2,606,409 Commercial and industrial 2,749 689 8,769 12,207 1,347,042 1,359,249 Residential real estate 5,669 943 10,687 17,299 2,743,013 2,760,312 Home equity 707 498 1,281 2,486 221,737 224,223 Consumer other 2,363 1,642 1,606 5,611 215,720 221,331 Total $ 17,644 $ 4,496 $ 26,945 $ 49,085 $ 8,990,601 $ 9,039,686 (In thousands) 30-59 Days Past Due 60-89 Days Past Due 90 Days or Greater Past Due Total Past Due Current Total Loans December 31, 2022 Construction $ — $ — $ — $ — $ 319,452 $ 319,452 Commercial multifamily — 214 — 214 619,874 620,088 Commercial real estate owner occupied 122 — 3,302 3,424 637,065 640,489 Commercial real estate non-owner occupied 143 — 191 334 2,495,903 2,496,237 Commercial and industrial 1,173 1,438 18,658 21,269 1,423,967 1,445,236 Residential real estate 3,694 2,134 11,724 17,552 2,294,895 2,312,447 Home equity 168 57 2,119 2,344 225,106 227,450 Consumer other 1,990 1,028 2,158 5,176 268,734 273,910 Total $ 7,290 $ 4,871 $ 38,152 $ 50,313 $ 8,284,996 $ 8,335,309
Schedule of Information Pertaining to Non-accrual Loans	The following is a summary of loans on nonaccrual status and loans past due 90 days or more and still accruing as of December 31, 2023 and December 31, 2022: December 31, 2023 (In thousands) Nonaccrual Amortized Cost Nonaccrual With No Related Allowance Past Due 90 Days or Greater and Accruing Interest Income Recognized on Nonaccrual Construction $ — $ — $ — $ — Commercial multifamily — — — — Commercial real estate owner occupied 605 285 199 — Commercial real estate non-owner occupied 3,798 45 — — Commercial and industrial 8,665 5,586 104 — Residential real estate 6,696 2,796 3,991 — Home equity 961 122 320 — Consumer other 682 — 924 — Total $ 21,407 $ 8,834 $ 5,538 $ — December 31, 2022 (In thousands) Nonaccrual Amortized Cost Nonaccrual With No Related Allowance Past Due 90 Days or Greater and Accruing Interest Income Recognized on Nonaccrual Construction $ — $ — $ — $ — Commercial multifamily — — — — Commercial real estate owner occupied 2,202 1,411 1,100 — Commercial real estate non-owner occupied 191 73 — — Commercial and industrial 16,992 14,223 1,666 — Residential real estate 8,901 5,307 2,823 — Home equity 1,568 388 551 — Consumer other 1,260 2 898 — Total $ 31,114 $ 21,404 $ 7,038 $ —
Schedule of Collateral Dependent Loans	The following table presents the amortized cost basis of individually analyzed collateral-dependent loans by loan portfolio segment: Type of Collateral (In thousands) Real Estate Investment Securities/Cash Other December 31, 2023 Construction $ — $ — $ — Commercial multifamily — — — Commercial real estate owner occupied 650 — — Commercial real estate non-owner occupied 342 — — Commercial and industrial 4,788 — 944 Residential real estate 5,035 — — Home equity 135 — — Consumer other 40 — — Total loans $ 10,990 $ — $ 944 Type of Collateral (In thousands) Real Estate Investment Securities/Cash Other December 31, 2022 Construction $ — $ — $ — Commercial multifamily — — — Commercial real estate owner occupied 2,793 — — Commercial real estate non-owner occupied 384 — — Commercial and industrial 288 — 16,931 Residential real estate 3,910 — — Home equity 501 — — Consumer other 2 — — Total loans $ 7,878 $ — $ 16,931
Schedule of Recorded Investment and Number of Modifications for TDRs Identified During the Period	The following table presents the amortized cost basis of loans at December 31, 2023 that were both experiencing financial difficulty and modified during the year ended December 31, 2023, by class and by type of modification. The percentage of the amortized cost basis of loans that were modified to borrowers in financial distress as compared to the amortized cost basis of each class of financing receivable is also presented below: (In thousands) Principal Forgiveness Payment Delay Term Extension Interest Rate Reduction Combination Term Extension and Principal Forgiveness Combination Term Extension and Interest Rate Reduction Total Class of Financing Receivable Year ended December 31, 2023 Construction $ — $ — $ — $ — $ — $ — — % Commercial multifamily — — — — — — — Commercial real estate owner occupied — — 222 — — — 0.04 Commercial real estate non-owner occupied — — 11,454 — — 3,600 0.58 Commercial and industrial — 34 16,005 — — 9 1.18 % Residential real estate — — — — — — — Home equity — — — — — — — Consumer other — — — — — — — Total $ — $ 34 $ 27,681 $ — $ — $ 3,609 0.35 % (In thousands) 30 - 59 Days Past Due 60 - 89 Days Past Due Greater Than 89 Days Past Due Total Past Due December 31, 2023 Construction $ — $ — $ — $ — Commercial multifamily — — — — Commercial real estate owner occupied — — — — Commercial real estate non-owner occupied — — — — Commercial and industrial 34 — — 34 Residential real estate — — — — Home equity — — — — Consumer other — — — — Total $ 34 $ — $ — $ 34 The following table presents the financial effect of the loan modifications presented above to borrowers experiencing financial difficulty for the year ended December 31, 2023: (In thousands) Principal Forgiveness Weighted Average Interest Rate Reduction Weighted Average Term Extension (months) Years ended December 31, 2023 Construction $ — — % 0 Commercial multifamily — — 0 Commercial real estate owner occupied — — 120 Commercial real estate non-owner occupied — 0.05 16 Commercial and industrial — 1.25 23 Residential real estate — — 0 Home equity — — 0 Consumer other — — 0

PREMISES AND EQUIPMENT (Tables)

PREMISES AND EQUIPMENT (Tables)	12 Months Ended
	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
Schedule of Premises and Equipment	Year-end premises and equipment are summarized as follows: (In thousands) 2023 2022 Estimated Useful Land $ 12,525 $ 15,536 N/A Buildings and improvements 89,222 99,977 5 - 39 years Furniture and equipment 64,290 63,554 3 - 7 years Construction in process 327 1,147 Premises and equipment, gross 166,364 180,214 Accumulated depreciation and amortization (97,449) (94,997) Premises and equipment, net $ 68,915 $ 85,217

OTHER INTANGIBLES (Tables)

OTHER INTANGIBLES (Tables)	12 Months Ended
	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Components of Other Intangible Assets	The components of other intangible assets are as follows: (In thousands) Gross Intangible Accumulated Net Intangible December 31, 2023 Non-maturity deposits (core deposit intangible) $ 77,213 $ (58,965) $ 18,248 All other intangible assets 7,866 (6,450) 1,416 Total $ 85,079 $ (65,415) $ 19,664 December 31, 2022 Non-maturity deposits (core deposit intangible) $ 77,213 $ (54,618) $ 22,595 All other intangible assets 7,866 (5,978) 1,888 Total $ 85,079 $ (60,596) $ 24,483

OTHER ASSETS (Tables)

OTHER ASSETS (Tables)	12 Months Ended
	Dec. 31, 2023
Other Assets [Abstract]
Schedule of Other Assets	Year-end other assets are summarized as follows: (In thousands) 2023 2022 Capitalized servicing rights $ 12,095 $ 13,047 Accrued interest receivable 53,096 46,868 Accrued federal and state tax receivable 33,564 34,386 Right-of-use assets 47,348 46,411 Derivative assets 45,668 54,241 Deferred tax asset 110,068 118,331 Other 39,918 35,651 Total other assets $ 341,757 $ 348,935
Schedule of Mortgage Servicing Rights Activity	Servicing rights activity was as follows: (In thousands) 2023 2022 2021 Balance at beginning of year $ 13,047 $ 16,022 $ 16,348 Additions 2,892 3,119 4,568 Amortization (4,330) (4,590) (4,921) Payoffs (952) (958) — Allowance adjustment 1,438 (546) 27 Balance at end of year $ 12,095 $ 13,047 $ 16,022 (1) As of December 31, 2023 and December 31, 2022, the servicing rights included in the total balance accounted for at fair value were $1.5 million and $1.8 million, respectively.

DEPOSITS (Tables)

DEPOSITS (Tables)	12 Months Ended
	Dec. 31, 2023
Deposits [Abstract]
Schedule of Time Deposits	A summary of year-end time deposits is as follows: (In thousands) 2023 2022 Maturity date: Within 1 year $ 2,364,280 $ 912,756 Over 1 year to 2 years 270,630 606,856 Over 2 years to 3 years 26,039 68,984 Over 3 years to 4 years 9,020 28,441 Over 4 years to 5 years 9,864 15,835 Over 5 years 6,417 835 Total $ 2,686,250 $ 1,633,707 Account balances: Less than $100,000 $ 724,911 $ 549,265 $100,000 through $250,000 1,276,175 642,600 $250,000 or more 685,164 441,842 Total $ 2,686,250 $ 1,633,707

BORROWED FUNDS (Tables)

BORROWED FUNDS (Tables)	12 Months Ended
	Dec. 31, 2023
Debt Disclosure [Abstract]
Schedule of Borrowed Funds	Borrowed funds at December 31, 2023 and 2022 are summarized, as follows: 2023 2022 (in thousands, except rates) Principal Weighted Principal Weighted Short-term borrowings: Advances from the FHLBB $ 260,000 5.54 % $ — — % Total short-term borrowings: 260,000 5.54 — — Long-term borrowings: Advances from the FHLBB 125,223 4.80 4,445 0.71 Subordinated notes 98,335 5.50 98,089 5.50 Junior subordinated borrowing - Trust I 15,464 7.49 15,464 6.54 Junior subordinated borrowing - Trust II 7,564 7.35 7,511 6.47 Total long-term borrowings: 246,586 5.33 125,509 5.52 Total $ 506,586 5.44 % $ 125,509 5.52 %
Schedule of Maturities of FHLBB Advances	A summary of maturities of FHLBB advances at year-end 2023 is as follows: 2023 (In thousands) Amount Weighted Fixed rate advances maturing: 2024 $ 290,010 5.48 % 2025 90,000 5.01 2026 521 2.20 2027 158 2.00 2028 and beyond 4,534 0.34 Total FHLBB advances $ 385,223 5.30 %

OTHER LIABILITIES (Tables)

OTHER LIABILITIES (Tables)	12 Months Ended
	Dec. 31, 2023
Other Liabilities Disclosure [Abstract]
Schedule of Other Liabilities	Year-end other liabilities are summarized as follows: (In thousands) 2023 2022 Derivative liabilities $ 75,957 $ 97,030 Collateral on interest rate swaps 25,520 — Finance lease liabilities 8,681 9,306 Employee benefits liability 43,042 45,175 Operating lease liabilities 53,026 53,736 Accrued interest payable 13,766 1,610 Customer transaction clearing accounts 12,366 5,758 Allowance for credit losses on unfunded commitments 9,256 8,588 Other 37,016 34,821 Total other liabilities $ 278,630 $ 256,024

EMPLOYEE BENEFIT PLANS (Tables)

EMPLOYEE BENEFIT PLANS (Tables)	12 Months Ended
	Dec. 31, 2023
Retirement Benefits [Abstract]
Schedule of changes in the Projected Benefit Obligation and Plan Assets	Information regarding the pension plan is as follows: December 31, (In thousands) 2023 2022 Change in projected benefit obligation: Projected benefit obligation at beginning of year $ 3,729 $ 5,328 Service Cost 59 68 Interest cost 186 141 Actuarial loss (20) (1,508) Benefits paid (250) (263) Settlements (62) (37) Projected benefit obligation at end of year 3,642 3,729 Accumulated benefit obligation 3,642 3,729 Change in fair value of plan assets: Fair value of plan assets at plan beginning of year 4,683 5,962 Actual return on plan assets 628 (979) Contributions by employer — — Benefits paid (250) (263) Settlements (62) (37) Fair value of plan assets at end of year 4,999 4,683 (Overfunded) status $ (1,357) $ (954) Information regarding the postretirement plans is as follows: December 31, (In thousands) 2023 2022 Change in accumulated postretirement benefit obligation: Accumulated post-retirement benefit obligation at beginning of year $ 3,215 $ 4,521 Service Cost 7 12 Interest cost 166 122 Participant contributions — — Actuarial loss 58 (1,396) Benefits paid (140) (44) Accumulated post-retirement benefit obligation at end of year $ 3,306 $ 3,215 Change in plan assets: Fair value of plan assets at beginning of year $ — $ — Contributions by employer 140 44 Contributions by participant — — Benefits paid (140) (44) Fair value of plan assets at end of year $ — $ —
Schedule of Amounts Recognized in Statement of Financial Position	Amounts Recognized on Consolidated Balance Sheets Other assets $ 1,357 $ 954 Other liabilities — — Amounts Recognized on Consolidated Balance Sheets Other Liabilities $ 3,306 $ 3,215
Schedule of Net Periodic Cost	Net periodic pension cost is comprised of the following: December 31, (In thousands) 2023 2022 2021 Service Cost $ 59 $ 68 $ 59 Interest Cost 186 141 140 Expected return on plan assets (295) (376) (410) Amortization of unrecognized actuarial loss 6 11 103 Net periodic pension (credit) $ (44) $ (156) $ (108) Net periodic post-retirement cost is comprised of the following: December 31, (In thousands) 2023 2022 2021 Service cost $ 7 $ 12 $ 13 Interest costs 166 122 113 Amortization of net prior service credit 83 83 83 Amortization of net actuarial loss (64) 30 55 Net periodic post-retirement costs $ 192 $ 247 $ 264
Schedule of Changes in Plan Assets and Benefit Obligations Recognized in Accumulated Other Comprehensive Income	Changes in plan assets and benefit obligations recognized in accumulated other comprehensive income are as follows: December 31, (In thousands) 2023 2022 2021 Amortization of actuarial (loss) $ (6) $ (11) $ (103) Actuarial (gain) (353) (154) (495) Settlement charge — — (58) Total recognized in accumulated other comprehensive income (359) (165) (656) Total recognized in net periodic pension cost recognized and other comprehensive income $ (403) $ (321) $ (764) Changes in benefit obligations recognized in accumulated other comprehensive income are as follows: December 31, (In thousands) 2023 2022 2021 Amortization of prior service credit $ (83) $ (83) $ (83) Net actuarial (gain) (1,148) (1,426) (253) Total recognized in accumulated other comprehensive income (1,231) (1,509) (336) Accrued post-retirement liability recognized $ 3,306 $ 3,215 $ 4,521
Schedule of Principal Actuarial Assumptions	The principal actuarial assumptions used are as follows: December 31, 2023 2022 2021 Projected benefit obligation Discount rate 4.99 % 5.21 % 2.73 % Net periodic pension cost Discount rate 5.21 % 2.73 % 2.35 % Long term rate of return on plan assets 6.50 % 6.50 % 7.00 %
Schedule of Fair Values of the Plan's Assets by Asset Category and Level Within the Fair Value Hierarchy	The fair value of the Plan’s assets by category within the fair value hierarchy are as follows at December 31, 2023 and December 31, 2022. During 2023, the Plan's equity mutual funds and fixed income mutual funds were transferred to Level 1 from Level 2 because they are actively traded and quoted prices were available. The Plan did not hold any assets classified as Level 3. December 31, 2023 Asset Category (In thousands) Total Level 1 Level 2 Equity Mutual Funds: Large-Cap $ 1,357 $ 1,357 $ — Mid-Cap 364 364 — Small-Cap 386 386 — International 828 828 — Fixed Income Mutual Funds: Intermediate Duration 1,674 1,674 — Equity Common/Collective Trusts: Large-Cap 336 — 336 Cash Equivalents - money market 54 54 — Total $ 4,999 $ 4,663 $ 336 December 31, 2022 Asset Category (In thousands) Total Level 1 Level 2 Equity Mutual Funds: Large-Cap $ 1,441 $ — $ 1,441 Mid-Cap 383 — 383 Small-Cap 318 — 318 International 814 — 814 Fixed Income - US Core 1,167 — 1,167 Intermediate Duration 396 — 396 Cash Equivalents - money market 164 72 92 Total $ 4,683 $ 72 $ 4,611
Schedule of Estimated Benefit Payments	Estimated benefit payments under the pension plans over the next 10 years at December 31, 2023 are as follows: Year Payments (In thousands) 2024 277 2025 271 2026 264 2027 258 2028 - 2033 1,551 Estimated benefit payments under the post-retirement benefit plan over the next ten years at December 31, 2023 are as follows: Year Payments (In thousands) 2024 115 2025 112 2026 108 2027 111 2028 - 2033 1,140
Schedule of Amounts in Accumulated Other Comprehensive Income That Have Not Yet Been Recognized as Components of Net Periodic Benefit Cost	The amounts in accumulated other comprehensive income that have not yet been recognized as components of net periodic benefit cost are as follows: December 31, (In thousands) 2023 2022 2021 Net prior service cost $ 1,075 $ 1,159 $ 1,242 Net actuarial (gain)/loss (690) (812) 615 Total recognized in accumulated other comprehensive income $ 385 $ 347 $ 1,857

INCOME TAXES (Tables)

INCOME TAXES (Tables)	12 Months Ended
	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Schedule of Components of Provision for Income Taxes	The components of the Company’s provision for income taxes for the years ended December 31, 2023, 2022, and 2021 were, as follows: (In thousands) 2023 2022 2021 Current: Federal tax expense $ 5,596 $ 17,915 $ 17,340 State tax expense 7,497 6,831 7,580 Total current tax expense (1) 13,093 24,746 24,920 Deferred: Federal tax (benefit)/expense (2,658) (2,274) 5,125 State tax (benefit)/expense (1,711) (1,187) 112 Total deferred tax (benefit)/expense (4,369) (3,461) 5,237 Change in valuation allowance — — 200 Income tax expense $ 8,724 $ 21,285 $ 30,357 (1) The Company recorded an additional $500 thousand benefit in 2021 resulting from the carryback of its 2020 NOL to recover federal income taxes paid in 2015 through 2018 (at a 35% federal income tax rate for years 2015 through 2017).
Schedule of Reconciliation of the Statutory Federal Income Tax Rate to Effective Tax Rate	The following is a reconciliation of the statutory federal income tax rate to the Company’s effective tax rate for the years ended December 31, 2023, 2022, and 2021: 2023 2022 2021 (In thousands, except rates) Amount Rate Amount Rate Amount Rate Statutory tax rate $ 16,448 21.0 % $ 23,902 21.0 % $ 31,294 21.0 % Increase (decrease) resulting from: State taxes, net of federal tax benefit 4,570 5.8 4,459 3.9 6,077 4.1 Tax exempt income - investments, net (3,611) (4.6) (3,515) (3.1) (3,475) (2.3) Bank-owned life insurance (1,568) (2.0) (1,258) (1.1) (1,348) (0.9) Tax credits, net of basis reduction (7,804) (10.0) (2,129) (1.9) (2,881) (1.9) Change in valuation allowance — — — — 200 0.1 Tax rate benefit on net operating loss carryback — — — — (493) (0.3) Other, net 689 0.9 (174) (0.1) 983 0.6 Effective tax rate $ 8,724 11.1 % $ 21,285 18.7 % $ 30,357 20.4 %
Schedule of Components of Deferred Tax Assets and Liabilities	As of December 31, 2023 and 2022, significant components of the Company’s deferred tax assets and liabilities were, as follows: (In thousands) 2023 2022 Deferred tax assets: Allowance for credit losses $ 31,181 $ 28,312 Unrealized capital loss on tax credit investments 2,688 1,603 Net unrealized loss on securities available for sale, swaps, and pension in OCI 50,704 63,335 Employee benefit plans 12,102 11,659 Purchase accounting adjustments 4,587 4,342 Net operating loss carryforwards 202 503 Deferred loan fees 5,654 4,049 Lease liability 13,583 14,148 Premises and equipment 1,188 2,630 Nonaccrual interest 890 1,069 Intangible amortization 1,020 659 Other 2,337 1,778 Deferred tax assets, net before valuation allowances 126,136 134,087 Valuation allowance (400) (400) Deferred tax assets, net of valuation allowances $ 125,736 $ 133,687 Deferred tax liabilities: Loan servicing rights $ (1,133) $ (1,212) Unamortized tax credit reserve (1,661) (1,687) Right-of-use asset (12,874) (12,457) Deferred tax liabilities $ (15,668) $ (15,356) Deferred tax assets, net $ 110,068 $ 118,331
Schedule of Components of the Valuation Allowance on Deferred Tax Asset	The components of the Company’s valuation allowance on its deferred tax asset, net as of December 31, 2023 and 2022 were, as follows: (in thousands) 2023 2022 State valuation allowances $ (400) $ (400)
Schedule of Changes in Unrecognized Tax Benefits	The following table presents changes in unrecognized tax benefits for the years ended December 31, 2023, 2022, and 2021: (In thousands) 2023 2022 2021 Unrecognized tax benefits at January 1 $ 1,042 $ 1,025 $ 516 Increase in gross amounts of tax positions related to prior years 782 17 509 Decrease in gross amounts of tax positions related to prior years — — — Decrease due to settlement with taxing authority — — — Decrease due to lapse in statute of limitations — — — Unrecognized tax benefits at December 31 $ 1,824 $ 1,042 $ 1,025

DERIVATIVE INSTRUMENTS AND HE_2

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Tables)	12 Months Ended
	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Interest Rate Swap Agreements and Non-hedging Derivative Assets and Liabilities	Information about interest rate swap agreements and non-hedging derivative assets and liabilities at December 31, 2023 follows: Notional Weighted Weighted Average Rate Estimated December 31, 2023 Received Contract pay rate (In thousands) (In years) (In thousands) Cash flow hedges: Interest rate swaps on commercial loans (1) $ 600,000 1.9 3.64 % 5.35 % $ — Interest rate collars on commercial loans 200,000 2.5 1,658 Total cash flow hedges 800,000 1,658 Economic hedges: Interest rate swap on tax advantaged economic development bond $ 6,202 5.9 5.82 % 5.09 % $ (172) Interest rate swaps on loans with commercial loan customers (1) 1,795,562 4.9 4.36 % 6.27 % (63,865) Reverse interest rate swaps on loans with commercial loan customers (1) 1,795,562 4.9 6.27 % 4.36 % 32,053 Risk participation agreements with dealer banks 376,553 5.5 (18) Forward sale commitments 2,207 0.2 21 Total economic hedges 3,976,086 (31,981) Non-hedging derivatives: Commitments to lend 11,104 0.2 34 Total non-hedging derivatives 11,104 34 Total $ 4,787,190 $ (30,289) (1) Fair value estimates include the impact of $26.7 million settled to market contract agreements. Information about interest rate swap agreements and non-hedging derivative asset and liabilities at December 31, 2022 follows: Notional Weighted Weighted Average Rate Estimated December 31, 2022 Received Contract pay rate (In thousands) (In years) (In thousands) Cash flow hedges: Interest rate swaps on commercial loans (1) $ 400,000 2.7 4.09 % 3.51 % $ — Forward-starting interest rate swaps on commercial loans (1) 200,000 3.3 — % 3.90 % — Interest rate collars on commercial loans 200,000 3.5 1,937 Total cash flow hedges 800,000 1,937 Economic hedges: Interest rate swap on tax advantaged economic development bond $ 7,062 6.9 4.49 % 5.09 % $ (193) Interest rate swaps on loans with commercial loan customers 1,685,263 5.7 4.11 % 5.55 % (95,114) Reverse interest rate swaps on loans with commercial loan customers (1) 1,685,263 5.7 5.55 % 4.11 % 50,267 Risk participation agreements with dealer banks 341,885 6.6 (89) Forward sale commitments 927 0.2 8 Total economic hedges 3,720,400 (45,121) Non-hedging derivatives: Commitments to lend 4,114 0.2 17 Total non-hedging derivatives 4,114 17 Total $ 4,524,514 $ (43,167) (1) Fair value estimates include the impact of $38.3 million settled to market contract agreements.
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)	Amounts included in the Consolidated Statements of Income and in the other comprehensive income/(loss) section of the Consolidated Statements of Comprehensive Income/(Loss) (related to interest rate derivatives designated as hedges of cash flows), were as follows: Years Ended December 31, (In thousands) 2023 2022 2021 Interest rate swaps and collars on commercial loans: Unrealized gain/(loss) recognized in accumulated other comprehensive loss $ 1,770 $ (6,667) $ — Less: Reclassification of unrealized (loss) from accumulated other comprehensive loss to interest income (632) — — Net tax benefit on items recognized in accumulated other comprehensive income (630) 1,789 — Other comprehensive gain/(loss) recorded in accumulated other comprehensive income/(loss), net of reclassification adjustments and tax effects $ 1,772 $ (4,878) $ — Net interest expense recognized on hedged commercial loans $ 9,026 $ (15) $ —
Schedule of Amounts Included in the Consolidated Statements of Income Related to Economic Hedges and Non-hedging Derivatives	Amounts included in the Consolidated Statements of Income related to economic hedges and non-hedging derivatives were as follows: Years Ended December 31, (In thousands) 2023 2022 2021 Economic hedges Interest rate swap on industrial revenue bond: Unrealized gain/(loss) recognized in other non-interest income $ 21 $ 941 $ 619 Interest rate swaps on loans with commercial loan customers: Unrealized gain/(loss) recognized in other non-interest income 31,310 (171,272) (86,099) Favorable/(unfavorable) change in credit valuation adjustment recognized in other non-interest income — 1,809 1,431 Reverse interest rate swaps on loans with commercial loan customers: Unrealized (loss)/gain recognized in other non-interest income (31,310) 171,272 86,099 Risk Participation Agreements: Unrealized (loss) recognized in other non-interest income (74) (521) (233) Forward Commitments: Unrealized gain/(loss) recognized in other non-interest income 13 (126) (186) Non-hedging derivatives Commitments to lend: Unrealized gain/(loss) recognized in other non-interest income $ 17 $ (107) $ (611) Realized gain in other non-interest income 536 462 2,854
Schedule of Assets Subject to an Enforceable Master Netting Arrangement	The following table presents the assets and liabilities subject to an enforceable master netting arrangement as of December 31, 2023 and December 31, 2022: Offsetting of Financial Assets and Derivative Assets Gross Gross Amounts Net Amounts of Assets Gross Amounts Not Offset in the Statements Financial Cash (in thousands) Net Amount As of December 31, 2023 Interest Rate Swap Agreements: Institutional counterparties $ 71,579 $ (31,812) $ 39,767 $ — $ — $ 39,767 Commercial counterparties 5,992 — 5,992 — — 5,992 Total $ 77,571 $ (31,812) $ 45,759 $ — $ — $ 45,759 Offsetting of Financial Assets and Derivative Assets Gross Gross Amounts Net Amounts of Assets Gross Amounts Not Offset in the Statements Financial Cash (in thousands) Net Amount As of December 31, 2022 Interest Rate Swap Agreements: Institutional counterparties $ 96,295 $ (45,046) $ 51,249 $ — $ — $ 51,249 Commercial counterparties 975 — 975 — — 975 Total $ 97,270 $ (45,046) $ 52,224 $ — $ — $ 52,224
Schedule of Liabilities Subject to an Enforceable Master Netting Arrangement	Offsetting of Financial Liabilities and Derivative Liabilities Gross Gross Amounts Net Amounts of Liabilities Gross Amounts Not Offset in the Statements Financial Cash (in thousands) Net Amount As of December 31, 2023 Interest Rate Swap Agreements: Institutional counterparties $ (11,277) $ 5,142 $ (6,135) $ 9,633 $ — $ 3,498 Commercial counterparties (69,796) — (69,796) — — (69,796) Total $ (81,073) $ 5,142 $ (75,931) $ 9,633 $ — $ (66,298) Offsetting of Financial Liabilities and Derivative Liabilities Gross Gross Amounts Net Amounts of Liabilities Gross Amounts Not Offset in the Statements Financial Cash (in thousands) Net Amount As of December 31, 2022 Interest Rate Swap Agreements: Institutional counterparties $ (1,271) $ 36 $ (1,235) $ 11,973 $ — $ 10,738 Commercial counterparties (102,595) 6,507 (96,088) — — (96,088) Total $ (103,866) $ 6,543 $ (97,323) $ 11,973 $ — $ (85,350)

LEASES (Tables)

LEASES (Tables)	12 Months Ended
	Dec. 31, 2023
Leases [Abstract]
Schedule of ROU Assets and Lease Liabilities	The following table represents the Consolidated Balance Sheets classification of the Company’s right-of-use (“ROU”) assets and lease liabilities: (In thousands) December 31, 2023 December 31, 2022 Lease Right-of-Use Assets Classification Operating lease right-of-use assets Other assets $ 47,348 $ 46,411 Finance lease right-of-use assets Premises and equipment, net 5,597 6,151 Total Lease Right-of-Use Assets $ 52,945 $ 52,562 Lease Liabilities Operating lease liabilities Other liabilities $ 53,026 $ 53,736 Finance lease liabilities Other liabilities 8,681 9,306 Total Lease Liabilities $ 61,707 $ 63,042
Schedule of Supplemental Cash Flow Information Related to Leases	Supplemental information related to leases was as follows: December 31, 2023 December 31, 2022 Weighted-Average Remaining Lease Term (in years) Operating leases 8.3 9.3 Finance leases 10.8 11.8 Weighted-Average Discount Rate Operating leases 2.90 % 2.56 % Finance leases 5.00 % 5.00 % Supplemental cash flow information related to leases was as follows: (In thousands) December 31, 2023 December 31, 2022 December 31, 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 9,009 $ 9,438 $ 10,897 Operating cash flows from finance leases 446 476 503 Financing cash flows from finance leases 593 555 528 Right-of-use assets obtained in exchange for lease obligations: Operating leases 8,512 5,730 2,976 Finance leases — — —
Schedule of Maturity Analysis of Operating Lease Liability	The following table presents a maturity analysis of the Company’s lease liability by lease classification at December 31, 2023: (In thousands) Operating Leases Finance Leases 2024 $ 9,519 $ 1,039 2025 8,533 1,039 2026 7,471 1,039 2027 6,589 1,039 2028 5,567 1,039 Thereafter 21,399 6,036 Total undiscounted lease payments 59,078 11,231 Less amounts representing interest (6,052) (2,550) Lease liability $ 53,026 $ 8,681
Schedule of Maturity Analysis of Finance Lease Liability	The following table presents a maturity analysis of the Company’s lease liability by lease classification at December 31, 2023: (In thousands) Operating Leases Finance Leases 2024 $ 9,519 $ 1,039 2025 8,533 1,039 2026 7,471 1,039 2027 6,589 1,039 2028 5,567 1,039 Thereafter 21,399 6,036 Total undiscounted lease payments 59,078 11,231 Less amounts representing interest (6,052) (2,550) Lease liability $ 53,026 $ 8,681

OTHER COMMITMENTS, CONTINGENC_2

OTHER COMMITMENTS, CONTINGENCIES, AND OFF-BALANCE SHEET ACTIVITIES (Tables)	12 Months Ended
	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Schedule of Financial Instruments Outstanding Whose Contract Amounts Represent Credit Risk	A summary of financial instruments outstanding whose contract amounts represent credit risk is as follows at year-end: (In thousands) 2023 2022 Commitments to originate new loans $ 256,877 $ 305,474 Unused funds on commercial and other lines of credit 1,146,415 966,523 Unadvanced funds on home equity lines of credit 347,543 336,924 Unadvanced funds on construction and real estate loans 467,702 694,091 Standby letters of credit 18,975 21,387 Total $ 2,237,512 $ 2,324,399

SHAREHOLDERS' EQUITY AND EARN_2

SHAREHOLDERS' EQUITY AND EARNINGS PER COMMON SHARE (Tables)	12 Months Ended
	Dec. 31, 2023
Equity [Abstract]
Schedule of Actual and Required Capital Ratios	The Company and Bank’s actual and required capital amounts were as follows: Minimum Actual (Dollars in thousands) Amount Ratio Amount Ratio December 31, 2023 Company (Consolidated) Total capital to risk-weighted assets $ 1,371,740 14.36 % $ 764,130 8.00 % Common Equity Tier 1 Capital to risk weighted assets 1,149,620 12.04 429,823 4.50 Tier 1 capital to risk-weighted assets 1,171,957 12.27 573,098 6.00 Tier 1 capital to average assets 1,171,957 9.65 382,065 4.00 Total risk-weighted assets 9,551,627 N/A N/A N/A December 31, 2022 Company (Consolidated) Total capital to risk-weighted assets $ 1,336,029 14.60 % $ 732,070 8.00 % Common Equity Tier 1 Capital to risk weighted assets 1,130,522 12.35 411,789 4.50 Tier 1 capital to risk-weighted assets 1,152,808 12.60 549,052 6.00 Tier 1 capital to average assets 1,152,808 10.18 366,035 4.00 Total risk-weighted assets 9,150,869 N/A N/A N/A Minimum Minimum to be Well Actual (Dollars in thousands) Amount Ratio Amount Ratio Amount Ratio December 31, 2023 Bank Total capital to risk-weighted assets $ 1,268,037 13.29 % $ 763,503 8.00 % $ 954,379 10.00 % Common Equity Tier 1 Capital to risk weighted assets 1,167,282 12.23 429,470 4.50 620,346 6.50 Tier 1 capital to risk-weighted assets 1,167,282 12.23 572,627 6.00 763,503 8.00 Tier 1 capital to average assets 1,167,282 9.61 381,751 4.00 477,189 5.00 Total risk-weighted assets 9,543,786 N/A N/A N/A N/A N/A December 31, 2022 Bank Total capital to risk-weighted assets $ 1,239,722 13.56 % $ 731,259 8.00 % $ 914,074 10.00 % Common Equity Tier 1 Capital to risk weighted assets 1,155,280 12.64 411,333 4.50 594,148 6.50 Tier 1 capital to risk-weighted assets 1,155,280 12.64 548,444 6.00 731,259 8.00 Tier 1 capital to average assets 1,155,280 10.20 365,629 4.00 457,037 5.00 Total risk-weighted assets 9,140,737 N/A N/A N/A N/A N/A
Schedule of Components of Accumulated Other Comprehensive Income	Year-end components of accumulated other comprehensive (loss) are as follows: (In thousands) 2023 2022 Other accumulated comprehensive (loss), before tax: Net unrealized holding (loss) on AFS securities $ (188,927) $ (236,887) Net (loss) on effective cash flow hedging derivatives (4,265) (6,667) Net unrealized holding (loss) on pension plans (528) (844) Income taxes related to items of accumulated other comprehensive (loss): Net unrealized holding loss on AFS securities 49,401 61,329 Net loss on effective cash flow hedging derivatives 1,159 1,789 Net unrealized holding loss on pension plans 144 228 Accumulated other comprehensive (loss) $ (143,016) $ (181,052)
Schedule of Components of Other Comprehensive (Loss)/Income	The following table presents the components of other comprehensive income/(loss) for the years ended December 31, 2023, 2022, and 2021: (In thousands) Before Tax Tax Effect Net of Tax Year Ended December 31, 2023 Net unrealized holding gain on AFS securities: Net unrealized gain arising during the period $ 22,903 $ (5,122) $ 17,781 Less: reclassification adjustment for (losses) realized in net income (25,057) 6,806 (18,251) Net unrealized holding gain on AFS securities 47,960 (11,928) 36,032 Net gain on cash flow hedging derivatives: Net unrealized gain arising during the period 1,770 (458) 1,312 Less: reclassification adjustment for (losses) realized in net income (632) 172 (460) Net gain on cash flow hedging derivatives 2,402 (630) 1,772 Net unrealized holding gain on pension plans Net unrealized gain arising during the period 316 (84) 232 Less: reclassification adjustment for (losses) realized in net income — — — Net unrealized holding gain on pension plans 316 (84) 232 Other comprehensive income $ 50,678 $ (12,642) $ 38,036 (In thousands) Before Tax Tax Effect Net of Tax Year Ended December 31, 2022 Net unrealized holding (loss) on AFS securities: Net unrealized (loss) arising during the period $ (235,075) $ 60,920 $ (174,155) Less: reclassification adjustment for gains realized in net income 6 (2) 4 Net unrealized holding (loss) on AFS securities (235,081) 60,922 (174,159) Net (loss) on cash flow hedging derivatives: Net unrealized (loss) arising during the period (6,667) 1,789 (4,878) Less: reclassification adjustment for (losses) realized in net income — — — Net (loss) on cash flow hedging derivatives (6,667) 1,789 (4,878) Net unrealized holding gain on pension plans Net unrealized gain arising during the period 1,674 (446) 1,228 Less: reclassification adjustment for (losses) realized in net income — — — Net unrealized holding gain on pension plans 1,674 (446) 1,228 Other comprehensive (loss) $ (240,074) $ 62,265 $ (177,809) (In thousands) Before Tax Tax Effect Net of Tax Year Ended December 31, 2021 Net unrealized holding (loss) on AFS securities: Net unrealized (loss) arising during the period $ (46,794) $ 11,937 $ (34,857) Less: reclassification adjustment for gains realized in net income — — — Net unrealized holding (loss) on AFS securities (46,794) 11,937 (34,857) Net unrealized holding gain on pension plans Net unrealized gain arising during the period 993 (250) 743 Less: reclassification adjustment for (losses) realized in net income — — — Net unrealized holding gain on pension plans 993 (250) 743 Other comprehensive (loss) $ (45,801) $ 11,687 $ (34,114)
Schedule of Gross Changes in Each Component of Accumulated Other Comprehensive Income (Loss)	The following table presents the changes in each component of accumulated other comprehensive (loss)/income, for the years ended December 31, 2023, 2022, and 2021: (in thousands) Net unrealized holding gain (loss) on AFS Securities Net loss on effective cash flow hedging derivatives Net unrealized holding gain (loss) on pension plans Total Year Ended December 31, 2023 Balance at Beginning of Year $ (175,557) $ (4,878) $ (617) $ (181,052) Other comprehensive income before reclassifications 17,781 1,312 232 19,325 Amounts reclassified from accumulated other comprehensive income (18,251) (460) — (18,711) Total other comprehensive income 36,032 1,772 232 38,036 Balance at End of Period $ (139,525) $ (3,106) $ (385) $ (143,016) Year Ended December 31, 2022 Balance at Beginning of Year $ (1,398) $ — $ (1,845) $ (3,243) Other comprehensive (loss)/income before reclassifications (174,155) (4,878) 1,228 (177,805) Amounts reclassified from accumulated other comprehensive income 4 — — 4 Total other comprehensive (loss)/income (174,159) (4,878) 1,228 (177,809) Balance at End of Period $ (175,557) $ (4,878) $ (617) $ (181,052) Year Ended December 31, 2021 Balance at Beginning of Year $ 33,459 $ — $ (2,588) $ 30,871 Other comprehensive (loss)/income before reclassifications (34,857) — 743 (34,114) Amounts reclassified from accumulated other comprehensive income — — — — Total other comprehensive (loss)/income (34,857) — 743 (34,114) Balance at End of Period $ (1,398) $ — $ (1,845) $ (3,243)
Schedule of Amounts Reclassified out of Each Component of Accumulated Other Comprehensive (Loss)/Income	The following table presents the amounts reclassified out of each component of accumulated other comprehensive income/(loss) for the years ended December 31, 2023, 2022, and 2021: Affected Line Item in the Years Ended December 31, (in thousands) 2023 2022 2021 Realized (losses)/gains on AFS securities: $ (25,057) $ 6 $ — Non-interest income 6,806 (2) — Tax expense (18,251) 4 — Realized (losses) on cash flow hedging derivatives: (632) — — Interest expense — — — Non-interest expense 172 — — Tax benefit (460) — — Realized (losses) on pension plans: — — — Non-interest expense — — — Tax expense — — — Total reclassifications for the period $ (18,711) $ 4 $ —
Schedule of Earnings (Loss) Per Share	Earnings per common share has been computed based on the following (average diluted shares outstanding is calculated using the treasury stock method): Years Ended December 31, (In thousands, except per share data) 2023 2022 2021 Net income $ 69,598 $ 92,533 $ 118,664 Average number of common shares issued 51,903 51,903 51,903 Less: average number of treasury shares 7,820 5,577 1,951 Less: average number of unvested stock award shares 795 762 712 Average number of basic common shares outstanding 43,288 45,564 49,240 Plus: dilutive effect of unvested stock award shares 216 345 309 Plus: dilutive effect of stock options outstanding — 5 5 Average number of diluted common shares outstanding 43,504 45,914 49,554 Basic earnings per common share $ 1.61 $ 2.03 $ 2.41 Diluted earnings per common share $ 1.60 $ 2.02 $ 2.39

STOCK-BASED COMPENSATION PLANS

STOCK-BASED COMPENSATION PLANS (Tables)	12 Months Ended
	Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]
Schedule of Activity in the Stock Award and Stock Option Plans	A summary of activity in the Company’s stock compensation plans is shown below: Non-vested Stock Stock Options Outstanding (Shares in thousands) Number of Shares Weighted- Average Number of Shares Weighted- Average Exercise Price Balance, December 31, 2022 704 $ 22.85 49 $ 26.46 Granted 446 26.18 — — Stock options exercised — — — — Stock awards vested (262) 21.29 — — Forfeited (103) 25.67 — — Expired — — — — Balance, December 31, 2023 785 $ 24.92 49 $ 26.46

FAIR VALUE MEASUREMENTS (Tables

FAIR VALUE MEASUREMENTS (Tables)	12 Months Ended
	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis	The following table summarizes assets and liabilities measured at fair value on a recurring basis as of year-end 2023 and 2022 segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value: December 31, 2023 (In thousands) Level 1 Level 2 Level 3 Total Trading security $ — $ — $ 6,142 $ 6,142 Available-for-sale securities: U.S Treasuries 7,981 — — 7,981 Municipal bonds and obligations — 63,853 — 63,853 Agency collateralized mortgage obligations — 347,874 — 347,874 Agency residential mortgage-backed securities — 417,480 — 417,480 Agency commercial mortgage-backed securities — 145,326 — 145,326 Corporate bonds — 35,192 3,923 39,115 Other bonds and obligations — 656 — 656 Marketable equity securities 13,029 — — 13,029 Loans held for investment — — 374 374 Loans held for sale — 2,237 — 2,237 Derivative assets — 45,613 55 45,668 Capitalized servicing rights — — 1,526 1,526 Derivative liabilities — 75,957 — 75,957 December 31, 2022 Level 1 Level 2 Level 3 Total (In thousands) Trading security $ — $ — $ 6,708 $ 6,708 Securities available for sale: U.S Treasuries 11,973 — — 11,973 Municipal bonds and obligations — 63,335 — 63,335 Agency collateralized mortgage obligations — 531,945 — 531,945 Agency residential mortgage-backed securities — 546,313 — 546,313 Agency commercial mortgage-backed securities — 228,468 — 228,468 Corporate bonds — 36,510 4,000 40,510 Other bonds and obligations — 656 656 Marketable equity securities 12,856 — — 12,856 Loans held for investment at fair value — — 605 605 Loans held for sale — 942 — 942 Derivative assets — 54,216 25 54,241 Capitalized servicing rights — — 1,846 1,846 Derivative liabilities — 97,030 — 97,030
Schedule of Loans Held for Investment and Loans Held for Sale	The cash flow assumptions include payment schedules for loans with current payment histories and estimated collateral value for delinquent loans. All of these loans were nonperforming as of December 31, 2023. Aggregate Fair Value December 31, 2023 Aggregate Aggregate Less Aggregate (In thousands) Fair Value Unpaid Principal Unpaid Principal Loans held for investment at fair value $ 374 $ 8,809 $ (8,435) Aggregate Fair Value December 31, 2022 Aggregate Aggregate Less Aggregate (In thousands) Fair Value Unpaid Principal Unpaid Principal Loans held for investment at fair value $ 605 $ 10,948 $ (10,343) Loans held for sale. The Company elected the fair value option for all mortgage loans originated for sale ("HFS") that were originated for sale on or after May 1, 2012. Loans HFS are classified as Level 2 as the fair value is based on input factors such as quoted prices for similar loans in active markets. Aggregate Aggregate Aggregate Fair Value December 31, 2023 (In thousands) Loans held for sale $ 2,237 $ 2,205 $ 32 Aggregate Aggregate Aggregate Fair Value December 31, 2022 (In thousands) Loans held for sale $ 942 $ 927 $ 15
Schedule of Changes in Level 3 Assets and Liabilities that were Measured at Fair Value on a Recurring Basis	The table below presents the changes in Level 3 assets that were measured at fair value on a recurring basis at year-end 2023 and 2022: Assets (Liabilities) (In thousands) Trading Securities Available for Sale Loans Held for Investment Commitments to Lend Forward Capitalized Servicing Rights Balance as of December 31, 2021 $ 8,354 $ 4,030 $ 1,200 $ 124 $ 134 $ 1,966 Unrealized (loss) gain, net recognized in other non-interest income (828) — 314 200 (126) (120) Unrealized (loss) included in accumulated other comprehensive loss — (30) — — — — Paydown of asset (818) — (909) — — — Transfers to loans held for sale — — — (307) — — Balance as of December 31, 2022 $ 6,708 $ 4,000 $ 605 $ 17 $ 8 $ 1,846 Unrealized gain (loss), net recognized in other non-interest income 294 — (128) 305 13 (320) Unrealized (loss) in included in accumulated other comprehensive loss — (77) — — — — Paydown of asset (860) — (103) — — — Transfers to loans held for sale — — (288) — — Balance as of December 31, 2023 $ 6,142 $ 3,923 $ 374 $ 34 $ 21 $ 1,526 Unrealized (losses)/gains relating to instruments still held at December 31, 2023 $ (60) $ (77) $ — $ 34 $ 21 $ — Unrealized (losses)/gains relating to instruments still held at December 31, 2022 $ (354) $ — $ — $ 17 $ 8 $ —
Schedule of Quantitative Information about the Significant Unobservable Inputs within Level 3	Quantitative information about the significant unobservable inputs within Level 3 recurring assets/(liabilities) as of December 31, 2023 and 2022 are as follows: Fair Value Significant Unobservable Input Value (In thousands) December 31, 2023 Valuation Techniques Unobservable Inputs Assets Trading Security $ 6,142 Discounted Cash Flow Discount Rate 4.19 % Securities Available for Sale 3,923 Indication from Market Maker Price 98.07 % Loans held for investment 374 Discounted Cash Flow Discount Rate 25.00 % Collateral Value $0.0 - $18.3 Commitments to Lend 34 Historical Trend Closing Ratio 84.29 % Pricing Model Origination Costs, per loan $ 3 Forward Commitments 21 Historical Trend Closing Ratio 84.29 % Pricing Model Origination Costs, per loan $ 3 Capitalized Servicing Rights 1,526 Discounted cash flow Constant prepayment rate (CPR) 7.63 % Discount rate 11.08 % Total $ 12,020 Fair Value Significant (In thousands) December 31, 2022 Valuation Techniques Unobservable Inputs Assets Trading Security $ 6,708 Discounted Cash Flow Discount Rate 5.92 % Securities Available for Sale 4,000 Indication from Market Maker Price 100.00 % Loans held for investment 605 Discounted Cash Flow Discount Rate 25.00 % Collateral Value $0.0 -$20.4 Commitments to Lend 17 Historical Trend Closing Ratio 80.63 % Pricing Model Origination Costs, per loan $ 2 Forward Commitments 8 Historical Trend Closing Ratio 80.63 % Pricing Model Origination Costs, per loan $ 2 Capitalized Servicing Rights 1,846 Discounted cash flow Constant prepayment rate (CPR) 11.07 % Discount rate 9.56 % Total $ 13,184 December 31, 2023 Fair Value Measurements as of December 31, 2023 (In thousands) Level 3 Level 3 Assets Individually evaluated loans $ 4,395 December 2023 Capitalized servicing rights 10,569 December 2023 Total $ 14,964 December 31, 2022 Fair Value Measurements as of December 31, 2022 (In thousands) Level 3 Level 3 Assets Individually evaluated loans $ 14,571 December 2022 Loans held for sale $ 3,369 December 2022 Capitalized servicing rights 11,201 December 2022 Total $ 29,141 Quantitative information about the significant unobservable inputs within Level 3 non-recurring assets as of December 31, 2023 and 2022 are as follows: (in thousands) December 31, 2023 Valuation Techniques Unobservable Inputs Range (Weighted Average) (a) Assets Individually evaluated loans $ 4,395 Fair value of collateral Discounted Cash Flow- Loss Severity (100.00)% to (0.08)% ((67.00)%) Appraised value $0 to $3,389 ($2,774) Capitalized servicing rights 10,569 Discounted cash flow Constant prepayment rate (CPR) 5.43% to 17.15% 12.31% Discount rate 10.09% to 16.59% (13.82%) Total Assets $ 14,964 (a) Where dollar amounts are disclosed, the amounts represent the lowest and highest fair value of the respective assets in the population except for adjustments for market/property conditions, which represents the range of adjustments to individual properties. (in thousands) December 31, 2022 Valuation Techniques Unobservable Inputs Range (Weighted Average) (a) Assets Individually evaluated loans $ 14,571 Fair value of collateral Discounted Cash Flow- Loss Severity (100.00)% to 74.74% ((40.02)%) Appraised value $0 to $2,160 ($643) Loans held for sale 3,369 Fair value of collateral Appraised value $3,369 Capitalized servicing rights 11,201 Discounted cash flow Constant prepayment rate (CPR) 5.81% to 13.18% (10.94%) Discount rate 9.59% to 22.70% (16.83%) Total Assets $ 29,141 (a) Where dollar amounts are disclosed, the amounts represent the lowest and highest fair value of the respective assets in the population except for adjustments for market/property conditions, which represents the range of adjustments to individual properties.
Schedule of Estimated Non-recurring Fair Value of Financial Instruments	The following tables summarize the estimated fair values, which represent exit price, and related carrying amounts, of the Company’s financial instruments. Certain financial instruments and all non-financial instruments are excluded from disclosure requirements. Accordingly, the aggregate fair value amounts presented herein may not necessarily represent the underlying fair value of the Company. December 31, 2023 Carrying Fair (In thousands) Level 1 Level 2 Level 3 Financial Assets Cash and cash equivalents $ 1,203,244 $ 1,203,244 $ 1,203,244 $ — $ — Trading security 6,142 6,142 — — 6,142 Marketable equity securities 13,029 13,029 13,029 — — Securities available for sale 1,022,285 1,022,285 7,981 1,010,381 3,923 Securities held to maturity 543,351 476,228 — 474,742 1,486 FHLB stock and restricted equity securities 22,689 N/A N/A N/A N/A Net loans 8,934,329 8,768,108 — — 8,768,108 Loans held for sale 2,237 2,237 — 2,237 — Accrued interest receivable 53,096 53,096 — 53,096 — Derivative assets 45,668 45,668 — 45,613 55 Financial Liabilities Total deposits 10,633,384 10,615,655 — 10,615,655 — Short-term debt 260,000 260,035 — 260,035 — Long-term FHLB advances 125,223 123,747 — 123,747 — Subordinated notes 121,363 98,138 — 98,138 — Accrued interest payable 13,766 13,766 — 13,766 — Derivative liabilities 75,957 75,957 — 75,957 — December 31, 2022 Carrying Fair (In thousands) Level 1 Level 2 Level 3 Financial Assets Cash and cash equivalents $ 685,355 $ 685,355 $ 685,355 $ — $ — Trading security 6,708 6,708 — — 6,708 Marketable equity securities 12,856 12,856 12,856 — — Securities available for sale 1,423,200 1,423,200 11,973 1,407,227 4,000 Securities held to maturity 583,453 507,464 — 505,508 1,956 FHLB stock and restricted equity securities 7,219 N/A N/A N/A N/A Net loans 8,239,039 8,194,110 — — 8,194,110 Loans held for sale 4,311 4,311 — 942 3,369 Accrued interest receivable 46,868 46,868 — 46,868 — Derivative assets 54,241 54,241 — 54,216 25 Financial Liabilities Total deposits 10,327,269 10,283,543 — 10,283,543 — Short-term debt — — — — — Long-term FHLB advances 4,445 2,782 — 2,782 — Subordinated notes 121,064 110,853 — 110,853 — Accrued interest payable 1,610 1,610 — 1,610 — Derivative liabilities 97,030 97,030 — 97,030 —

CONDENSED FINANCIAL STATEMENT_2

CONDENSED FINANCIAL STATEMENTS OF PARENT COMPANY (Tables)	12 Months Ended
	Dec. 31, 2023
Condensed Financial Information Disclosure [Abstract]
Schedule of CONDENSED BALANCE SHEETS	CONDENSED BALANCE SHEETS December 31, (In thousands) 2023 2022 Assets Cash due from Berkshire Bank $ 98,452 $ 90,022 Investment in subsidiaries 1,038,039 986,805 Other assets 399 1,445 Total assets $ 1,136,890 $ 1,078,272 Liabilities and Shareholders’ Equity Subordinated notes $ 121,363 $ 121,064 Accrued expenses 3,306 3,146 Shareholders’ equity 1,012,221 954,062 Total liabilities and shareholders’ equity $ 1,136,890 $ 1,078,272
Schedule of CONDENSED STATEMENTS OF OPERATIONS	CONDENSED STATEMENTS OF INCOME Years Ended December 31, (In thousands) 2023 2022 2021 Income: Dividends from subsidiaries $ 62,000 $ 108,000 $ 118,000 Other 50 23 31 Total income 62,050 108,023 118,031 Interest expense 5,697 7,044 5,393 Non-interest expenses 3,702 2,754 2,719 Total expense 9,399 9,798 8,112 Income before income taxes and equity in undistributed income of subsidiaries 52,651 98,225 109,919 Income tax (benefit) (2,500) (2,586) (2,136) Income before equity in undistributed income of subsidiaries 55,151 100,811 112,055 Equity in undistributed results of operations of subsidiaries 14,447 (8,278) 6,609 Net income 69,598 92,533 118,664 Comprehensive income/(loss) $ 107,634 $ (85,276) $ 84,550
Schedule of CONDENSED STATEMENTS OF CASH FLOWS	CONDENSED STATEMENTS OF CASH FLOWS Years Ended December 31, (In thousands) 2023 2022 2021 Cash flows from operating activities: Net income $ 69,598 $ 92,533 $ 118,664 Adjustments to reconcile net income to net cash provided by operating activities: Equity in undistributed results of operations of subsidiaries (14,447) 8,278 (6,609) Other, net 8,688 5,998 5,816 Net cash provided by operating activities 63,839 106,809 117,871 Cash flows from investing activities: Sale of securities — — 167 Net cash provided by investing activities — — 167 Cash flows from financing activities: Proceeds from issuance of short term debt — — 232 Proceeds from issuance of long term debt — 98,032 — Repayment of long term debt — (75,000) — Payment to repurchase common stock (23,844) (124,519) (68,712) Common stock cash dividends paid (31,707) (24,527) (24,553) Other, net 142 281 431 Net cash (used) in financing activities (55,409) (125,733) (92,602) Net change in cash and cash equivalents 8,430 (18,924) 25,436 Cash and cash equivalents at beginning of year 90,022 108,946 83,510 Cash and cash equivalents at end of year $ 98,452 $ 90,022 $ 108,946

QUARTERLY DATA (UNAUDITED) (Tab

QUARTERLY DATA (UNAUDITED) (Tables)	12 Months Ended
	Dec. 31, 2023
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Results of Operations	Quarterly results of operations were as follows: 2023 2022 (In thousands, except per share data) Fourth Quarter Third Quarter Second Quarter First Quarter Fourth Quarter Third Quarter Second Quarter First Quarter Interest and dividend income $ 150,537 $ 148,021 $ 145,425 $ 132,316 $ 121,384 $ 103,671 $ 87,379 $ 74,823 Interest expense 62,116 57,687 52,666 34,783 19,292 11,587 6,021 5,760 Net interest income 88,421 90,334 92,759 97,533 102,092 92,084 81,358 69,063 Non-interest income (8,383) 17,465 17,094 16,606 15,654 16,251 16,351 20,681 Total revenue 80,038 107,799 109,853 114,139 117,746 108,335 97,709 89,744 Provision expense/(benefit) for credit losses 7,000 8,000 8,000 8,999 12,000 3,000 — (4,000) Non-interest expense 78,992 76,513 74,048 71,955 70,014 81,677 68,475 68,550 Income before income taxes (5,954) 23,286 27,805 33,185 35,732 23,658 29,234 25,194 Income tax (benefit)/expense (4,509) 3,741 3,944 5,548 5,227 4,941 6,119 4,998 Net income $ (1,445) $ 19,545 $ 23,861 $ 27,637 $ 30,505 $ 18,717 $ 23,115 $ 20,196 Basic earnings per share $ (0.03) $ 0.45 $ 0.55 $ 0.63 $ 0.69 $ 0.42 $ 0.50 $ 0.42 Diluted earnings per share $ (0.03) $ 0.45 $ 0.55 $ 0.63 $ 0.69 $ 0.42 $ 0.50 $ 0.42 Weighted average common shares outstanding: Basic 42,852 43,164 43,443 43,693 44,105 44,700 45,818 47,668 Diluted 43,101 43,347 43,532 44,036 44,484 45,034 46,102 48,067

NET INTEREST INCOME AFTER PRO_2

NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES (Tables)	12 Months Ended
	Dec. 31, 2023
Banking and Thrift, Interest [Abstract]
Schedule of Net Interest Income After Provision for Loan Losses	Presented below is net interest income after provision for credit losses for the three years ended 2023, 2022, and 2021, respectively: Years Ended December 31, (In thousands) 2023 2022 2021 Net interest income $ 369,047 $ 344,597 $ 291,166 Provision expense/(benefit) for credit losses 31,999 11,000 (500) Net interest income after provision for credit losses 337,048 333,597 291,666 Total non-interest income 42,782 68,937 143,248 Total non-interest expense 301,508 288,716 285,893 Income before income taxes 78,322 113,818 149,021 Income tax expense 8,724 21,285 30,357 Net income 69,598 92,533 118,664

REVENUE (Tables)

REVENUE (Tables)	12 Months Ended
	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregation of Revenue	The following presents non-interest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the years ended 2023, 2022, and 2021, respectively. Years Ended December 31, (In thousands) 2023 2022 2021 Non-interest income In-scope of Topic 606: Service charges on deposit accounts $ 24,160 $ 22,396 $ 20,249 Wealth management fees 10,197 10,008 10,530 Interchange income 8,395 8,470 8,321 Insurance commissions and fees — — 7,003 Non-interest income (in-scope of Topic 606) $ 42,752 $ 40,874 $ 46,103 Non-interest income (out-of-scope of Topic 606) 30 28,063 97,145 Total non-interest income $ 42,782 $ 68,937 $ 143,248

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 segment	Dec. 31, 2021 USD ($)	Aug. 24, 2021 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Minimum number of days past due for loans excluding automobile loans on which interest is generally not accrued	90 days
Number of days until which automobile loans accrue, after which they are charged off	120 days
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration]		Gain on sale of business operations and assets, net
Number of reportable segments | segment	1
Sold | Berkshire Insurance Group Inc
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration			$ 41.5
Goodwill			$ 1.6
Pre tax gain		$ 37.2

CASH AND CASH EQUIVALENTS (Deta

CASH AND CASH EQUIVALENTS (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
CASH AND CASH EQUIVALENTS
Reserve requirement, included in cash and equivalents	$ 0	$ 0
Short-term investments pledged as collateral
CASH AND CASH EQUIVALENTS
Short-term investments	$ 0	$ 0

TRADING SECURITY (Details)

TRADING SECURITY (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Amortized cost	$ 6.2	$ 7.1
Fair value	6.1	6.7
Unrealized losses	$ 0.3	$ (0.8)	$ (0.6)

SECURITIES - Schedule of Securi

SECURITIES - Schedule of Securities Available for Sale (AFS) and Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Securities available for sale
Amortized Cost	$ 1,211,212	$ 1,661,196
Gross Unrealized Gains	598	571
Gross Unrealized Losses	(189,525)	(238,567)
Fair Value	1,022,285	1,423,200
Allowance	0	0
Securities held to maturity
Amortized Cost	543,351	583,453
Gross Unrealized Gains	704	699
Gross Unrealized Losses	(67,827)	(76,688)
Fair Value	476,228	507,464
Securities held to maturity, Allowance	68	91	$ 105	$ 104
Marketable equity securities, Amortized Cost	15,035	15,035
Marketable equity securities, Gross Unrealized Gains	0	0
Marketable equity securities, Gross Unrealized Losses	(2,006)	(2,179)
Marketable equity securities, Fair Value	13,029	12,856
Amortized Cost	1,769,598	2,259,684
Gross Unrealized Gains	1,302	1,270
Gross Unrealized Losses	(259,358)	(317,434)
Fair Value	1,511,542	1,943,520
Allowance	68	91
U.S Treasuries
Securities available for sale
Amortized Cost	7,980	11,972
Gross Unrealized Gains	1	1
Gross Unrealized Losses	0	0
Fair Value	7,981	11,973
Allowance	0	0
Municipal bonds and obligations
Securities available for sale
Amortized Cost	64,788	65,943
Gross Unrealized Gains	494	422
Gross Unrealized Losses	(1,429)	(3,030)
Fair Value	63,853	63,335
Allowance	0	0
Securities held to maturity
Amortized Cost	251,046	266,793
Gross Unrealized Gains	698	691
Gross Unrealized Losses	(16,987)	(23,704)
Fair Value	234,757	243,780
Securities held to maturity, Allowance	48	66	70	64
Agency collateralized mortgage obligations
Securities available for sale
Amortized Cost	426,986	631,732
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(79,112)	(99,787)
Fair Value	347,874	531,945
Allowance	0	0
Securities held to maturity
Amortized Cost	112,929	128,136
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(18,360)	(20,420)
Fair Value	94,569	107,716
Securities held to maturity, Allowance	0	0
Agency mortgage-backed securities
Securities available for sale
Amortized Cost	492,633	643,308
Gross Unrealized Gains	2	1
Gross Unrealized Losses	(75,155)	(96,996)
Fair Value	417,480	546,313
Allowance	0	0
Securities held to maturity
Amortized Cost	47,379	50,958
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(8,052)	(9,240)
Fair Value	39,327	41,718
Securities held to maturity, Allowance	0	0
Agency commercial mortgage-backed securities
Securities available for sale
Amortized Cost	174,879	264,218
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(29,553)	(35,750)
Fair Value	145,326	228,468
Allowance	0	0
Securities held to maturity
Amortized Cost	130,169	135,206
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(24,368)	(23,203)
Fair Value	105,801	112,003
Securities held to maturity, Allowance	0	0
Corporate bonds
Securities available for sale
Amortized Cost	43,291	43,368
Gross Unrealized Gains	34	80
Gross Unrealized Losses	(4,210)	(2,938)
Fair Value	39,115	40,510
Allowance	0	0
Tax advantaged economic development bonds
Securities held to maturity
Amortized Cost	1,540	2,069
Gross Unrealized Gains	6	8
Gross Unrealized Losses	(60)	(121)
Fair Value	1,486	1,956
Securities held to maturity, Allowance	20	25	$ 35	$ 40
Other bonds and obligations
Securities available for sale
Amortized Cost	655	655
Gross Unrealized Gains	67	67
Gross Unrealized Losses	(66)	(66)
Fair Value	656	656
Allowance	0	0
Securities held to maturity
Amortized Cost	288	291
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	288	291
Securities held to maturity, Allowance	$ 0	$ 0

SECURITIES - Narrative (Details

SECURITIES - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) security	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Investment Holdings [Line Items]
Proceeds from sales of securities available for sale | $	$ 267,199	$ 149,994	$ 0
Municipal bonds and obligations
Investment Holdings [Line Items]
Available-for-sale, securities in unrealized loss positions	35
Number of securities	92
Debt securities, continuous unrealized loss position, qualitative disclosure, aggregate losses percentage	4.30%
Number of HTM investment securities in unrealized loss positions	96
Number of securities in the portfolio of HTM	173
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions	12.30%
Agency collateralized mortgage obligations
Investment Holdings [Line Items]
Available-for-sale, securities in unrealized loss positions	197
Number of securities	199
Debt securities, continuous unrealized loss position, qualitative disclosure, aggregate losses percentage	18.50%
Number of HTM investment securities in unrealized loss positions	12
Number of securities in the portfolio of HTM	12
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions	16.30%
Agency commercial mortgage-backed securities
Investment Holdings [Line Items]
Available-for-sale, securities in unrealized loss positions	119
Number of securities	123
Debt securities, continuous unrealized loss position, qualitative disclosure, aggregate losses percentage	15.70%
Number of HTM investment securities in unrealized loss positions	17
Number of securities in the portfolio of HTM	17
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions	18.30%
Corporate bonds
Investment Holdings [Line Items]
Available-for-sale, securities in unrealized loss positions	14
Number of securities	15
Debt securities, continuous unrealized loss position, qualitative disclosure, aggregate losses percentage	9.90%
Other bonds and obligations
Investment Holdings [Line Items]
Available-for-sale, securities in unrealized loss positions	2
Number of securities	3
Debt securities, continuous unrealized loss position, qualitative disclosure, aggregate losses percentage	18.30%
Tax advantaged economic development bonds
Investment Holdings [Line Items]
Number of HTM investment securities in unrealized loss positions	1
Number of securities in the portfolio of HTM	2
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions	6.10%
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent, Before Reclassification
Investment Holdings [Line Items]
Other accumulated comprehensive (loss), before tax: | $	$ 188,900	238,000
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent, Reclassification
Investment Holdings [Line Items]
Other accumulated comprehensive (loss), before tax: | $		1,100
Net unrealized holding (loss) on AFS securities
Investment Holdings [Line Items]
Other accumulated comprehensive (loss), before tax: | $	(188,927)	(236,887)
Income taxes related to items of accumulated other comprehensive (loss): | $	$ 49,401	$ 61,329

SECURITIES - Schedule of Debt S

SECURITIES - Schedule of Debt Securities, Held to Maturity, Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 91	$ 105	$ 104
Provision expense (benefit) for credit losses	(23)	(14)	1
Ending balance	68	91	105
Municipal bonds and obligations
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Beginning balance	66	70	64
Provision expense (benefit) for credit losses	(18)	(4)	6
Ending balance	48	66	70
Tax advantaged economic development bonds
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward]
Beginning balance	25	35	40
Provision expense (benefit) for credit losses	(5)	(10)	(5)
Ending balance	$ 20	$ 25	$ 35

SECURITIES - Schedule of Amorti

SECURITIES - Schedule of Amortized Cost and Estimated Fair Value of Available for Sale (AFS) and Held to Maturity (HTM) Securities, Segregated by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Available for sale, Amortized Cost
Within 1 year	$ 8,290
Over 1 year to 5 years	11,205
Over 5 years to 10 years	55,843
Over 10 years	41,376
Total bonds and obligations	116,714
Mortgage-backed securities	1,094,498
Amortized Cost	1,211,212	$ 1,661,196
Available for sale, Fair Value
Within 1 year	8,292
Over 1 year to 5 years	11,083
Over 5 years to 10 years	51,922
Over 10 years	40,308
Total bonds and obligations	111,605
Mortgage-backed securities	910,680
Fair Value	1,022,285	1,423,200
Held to maturity, Amortized Cost
Within 1 year	410
Over 1 year to 5 years	1,802
Over 5 years to 10 years	35,956
Over 10 years	214,706
Total bonds and obligations	252,874
Mortgage-backed securities	290,477
Amortized Cost	543,351	583,453
Held to maturity, Fair Value
Within 1 year	410
Over 1 year to 5 years	1,797
Over 5 years to 10 years	35,883
Over 10 years	198,441
Total bonds and obligations	236,531
Mortgage-backed securities	239,697
Fair Value	$ 476,228	$ 507,464

SECURITIES - Schedule of Amor_2

SECURITIES - Schedule of Amortized Cost and Fair Values of Pledged Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Amortized Cost
Securities pledged to swap counterparties	$ 9,780	$ 11,972
Securities pledged for municipal deposits	289,740	304,741
Securities pledged, amortized cost	299,520	316,713
Fair Value
Securities pledged to swap counterparties	9,633	11,973
Securities pledged for municipal deposits	250,979	276,804
Securities pledged, fair value	$ 260,612	$ 288,777

SECURITIES - Schedule of Compon

SECURITIES - Schedule of Components of Net Realized Gains and Losses on the Sale of AFS Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Gross recognized gains	$ 1,199	$ 72	$ 108
Gross recognized losses	(26,083)	(2,009)	(550)
Net recognized (losses)	$ (24,884)	$ (1,937)	$ (442)

SECURITIES - Schedule of Secu_2

SECURITIES - Schedule of Securities with Unrealized Losses, Segregated by the Duration of their Continuous Unrealized Loss Positions (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	$ 534	$ 40,176
Less Than Twelve Months, Fair Value	15,891	443,798
Over Twelve Months, Gross Unrealized Losses	188,991	198,391
Over Twelve Months, Fair Value	965,075	938,147
Total Gross Unrealized Losses	189,525	238,567
Total Fair Value	980,966	1,381,945
Securities held to maturity
Less Than Twelve Months, Gross Unrealized Losses	230	8,958
Less Than Twelve Months, Fair Value	28,916	187,307
Over Twelve Months, Gross Unrealized Losses	67,597	67,730
Over Twelve Months, Fair Value	332,661	239,115
Total Gross Unrealized Losses	67,827	76,688
Total Fair Value	361,577	426,422
Securities available for sale and held to maturity
Less Than Twelve Months, Gross Unrealized Losses	764	49,134
Less Than Twelve Months, Fair Value	44,807	631,105
Over Twelve Months, Gross Unrealized Losses	256,588	266,121
Over Twelve Months, Fair Value	1,297,736	1,177,262
Total Gross Unrealized Losses	257,352	315,255
Total Fair Value	1,342,543	1,808,367
Municipal bonds and obligations
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	76	2,406
Less Than Twelve Months, Fair Value	9,326	36,696
Over Twelve Months, Gross Unrealized Losses	1,353	624
Over Twelve Months, Fair Value	22,739	2,763
Total Gross Unrealized Losses	1,429	3,030
Total Fair Value	32,065	39,459
Securities held to maturity
Less Than Twelve Months, Gross Unrealized Losses	229	5,476
Less Than Twelve Months, Fair Value	28,895	125,494
Over Twelve Months, Gross Unrealized Losses	16,758	18,228
Over Twelve Months, Fair Value	92,063	38,341
Total Gross Unrealized Losses	16,987	23,704
Total Fair Value	120,958	163,835
Agency collateralized mortgage obligations
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	0	23,052
Less Than Twelve Months, Fair Value	0	247,509
Over Twelve Months, Gross Unrealized Losses	79,112	76,735
Over Twelve Months, Fair Value	347,874	284,434
Total Gross Unrealized Losses	79,112	99,787
Total Fair Value	347,874	531,943
Securities held to maturity
Less Than Twelve Months, Gross Unrealized Losses	1	2,734
Less Than Twelve Months, Fair Value	21	49,539
Over Twelve Months, Gross Unrealized Losses	18,359	17,686
Over Twelve Months, Fair Value	94,548	58,177
Total Gross Unrealized Losses	18,360	20,420
Total Fair Value	94,569	107,716
Agency mortgage-backed securities
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	1	3,124
Less Than Twelve Months, Fair Value	22	37,540
Over Twelve Months, Gross Unrealized Losses	75,154	93,872
Over Twelve Months, Fair Value	417,151	508,683
Total Gross Unrealized Losses	75,155	96,996
Total Fair Value	417,173	546,223
Securities held to maturity
Less Than Twelve Months, Gross Unrealized Losses	0	300
Less Than Twelve Months, Fair Value	0	2,419
Over Twelve Months, Gross Unrealized Losses	8,052	8,940
Over Twelve Months, Fair Value	39,327	39,299
Total Gross Unrealized Losses	8,052	9,240
Total Fair Value	39,327	41,718
Agency commercial mortgage-backed securities
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	0	9,885
Less Than Twelve Months, Fair Value	0	96,396
Over Twelve Months, Gross Unrealized Losses	29,553	25,865
Over Twelve Months, Fair Value	145,326	132,043
Total Gross Unrealized Losses	29,553	35,750
Total Fair Value	145,326	228,439
Securities held to maturity
Less Than Twelve Months, Gross Unrealized Losses	0	447
Less Than Twelve Months, Fair Value	0	9,713
Over Twelve Months, Gross Unrealized Losses	24,368	22,756
Over Twelve Months, Fair Value	105,801	102,290
Total Gross Unrealized Losses	24,368	23,203
Total Fair Value	105,801	112,003
Corporate bonds
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	457	1,709
Less Than Twelve Months, Fair Value	6,543	25,657
Over Twelve Months, Gross Unrealized Losses	3,753	1,229
Over Twelve Months, Fair Value	31,690	9,929
Total Gross Unrealized Losses	4,210	2,938
Total Fair Value	38,233	35,586
Other bonds and obligations
Securities available for sale
Less Than Twelve Months, Gross Unrealized Losses	0	0
Less Than Twelve Months, Fair Value	0	0
Over Twelve Months, Gross Unrealized Losses	66	66
Over Twelve Months, Fair Value	295	295
Total Gross Unrealized Losses	66	66
Total Fair Value	295	295
Securities held to maturity
Total Gross Unrealized Losses	0	0
Tax advantaged economic development bonds
Securities held to maturity
Less Than Twelve Months, Gross Unrealized Losses	0	1
Less Than Twelve Months, Fair Value	0	142
Over Twelve Months, Gross Unrealized Losses	60	120
Over Twelve Months, Fair Value	922	1,008
Total Gross Unrealized Losses	60	121
Total Fair Value	$ 922	$ 1,150

LOANS AND RELATED ALLOWANCE F_3

LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES - Schedule of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Allowance for loan losses
Total loans	$ 9,039,686	$ 8,335,309
Allowance for credit losses on unfunded commitments	105,357	96,270	$ 106,094	$ 127,302
Net loans	8,934,329	8,239,039
Construction and commercial multifamily | Construction
Allowance for loan losses
Total loans	640,371	319,452
Allowance for credit losses on unfunded commitments	2,885	1,227	3,206	5,111
Construction and commercial multifamily | Commercial multifamily
Allowance for loan losses
Total loans	599,145	620,088
Allowance for credit losses on unfunded commitments	2,475	1,810	6,120	5,916
Commercial real estate loans | Commercial real estate owner occupied
Allowance for loan losses
Total loans	628,646	640,489
Allowance for credit losses on unfunded commitments	9,443	10,739	12,752	12,380
Commercial real estate loans | Commercial real estate non-owner occupied
Allowance for loan losses
Total loans	2,606,409	2,496,237
Allowance for credit losses on unfunded commitments	38,221	30,724	32,106	35,850
Commercial and industrial loans
Allowance for loan losses
Total loans	1,359,249	1,445,236
Allowance for credit losses on unfunded commitments	18,602	18,743	22,584	25,013
Residential real estate | Residential real estate
Allowance for loan losses
Total loans	2,760,312	2,312,447
Allowance for credit losses on unfunded commitments	19,622	18,666	22,406	28,491
Consumer loans | Home equity
Allowance for loan losses
Total loans	224,223	227,450
Allowance for credit losses on unfunded commitments	2,015	2,173	4,006	6,482
Consumer loans | Consumer other
Allowance for loan losses
Total loans	221,331	273,910
Allowance for credit losses on unfunded commitments	$ 12,094	$ 12,188	$ 2,914	$ 8,059

LOANS AND RELATED ALLOWANCE F_4

LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Allowance for loan losses
Net loans	$ 8,934,329	$ 8,239,039
Payments to acquire loans and leases held-for-investment	649,000	718,000	$ 211,000
Proceeds from sales of seasoned commercial loan portfolios	255,000	366,000	560,000
(Gain) on SBA loan sales	10,300	12,500	$ 20,700
Total loans	9,039,686	8,335,309
Other liabilities	278,630	256,024
Loans receivable, related parties	800	800
Commitment to lend	7,800
Related Party
Allowance for loan losses
Other liabilities	1,500	1,500
Asset Pledged as Collateral
Allowance for loan losses
Loans pledged as collateral	1,300,000	800,000
Residential real estate | Collateralized Residential Mortgage Loans, In Process of Foreclosure
Allowance for loan losses
Total loans	3,800	3,000
Commercial and industrial loans
Allowance for loan losses
Total loans	1,359,249	1,445,236
Financing receivable, nonaccrual, medallion loans, fair value	400	600
Financing receivable, nonaccrual, medallion loans, contractual balance	8,800	10,900
Total Loans | Credit Concentration Risk | Non-Residential
Allowance for loan losses
Total loans	$ 2,200,000	$ 1,900,000
Concentration risk, percentage	24%	22.70%
Small Business Administration (SBA), CARES Act, Paycheck Protection Program
Allowance for loan losses
Net loans	$ 3,000	$ 5,800

LOANS AND RELATED ALLOWANCE F_5

LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES - Schedule of Allowance for Credit Losses for Loans, Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	$ 96,270	$ 106,094	$ 127,302
Charge-offs	(29,257)	(28,058)	(31,018)
Recoveries	6,723	7,220	10,311
Provision for Credit Losses	32,022	11,014	(501)
Balance at End of Period	105,357	96,270	106,094
Impact of ASC 326 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	(401)
Balance at End of Period		(401)
Construction and commercial multifamily | Construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	1,227	3,206	5,111
Charge-offs	(1)	0	0
Recoveries	0	0	0
Provision for Credit Losses	1,659	(1,979)	(1,905)
Balance at End of Period	2,885	1,227	3,206
Construction and commercial multifamily | Construction | Impact of ASC 326 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	0
Balance at End of Period		0
Construction and commercial multifamily | Commercial multifamily
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	1,810	6,120	5,916
Charge-offs	0	(94)	(404)
Recoveries	6	112	157
Provision for Credit Losses	659	(4,328)	451
Balance at End of Period	2,475	1,810	6,120
Construction and commercial multifamily | Commercial multifamily | Impact of ASC 326 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	0
Balance at End of Period		0
Commercial real estate loans | Commercial real estate owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	10,739	12,752	12,380
Charge-offs	(489)	(687)	(1,640)
Recoveries	1,139	702	204
Provision for Credit Losses	(1,970)	(2,028)	1,808
Balance at End of Period	9,443	10,739	12,752
Commercial real estate loans | Commercial real estate owner occupied | Impact of ASC 326 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	24
Balance at End of Period		24
Commercial real estate loans | Commercial real estate non-owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	30,724	32,106	35,850
Charge-offs	(65)	(5,894)	(14,557)
Recoveries	204	1,549	2,522
Provision for Credit Losses	7,358	2,963	8,291
Balance at End of Period	38,221	30,724	32,106
Commercial real estate loans | Commercial real estate non-owner occupied | Impact of ASC 326 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	0
Balance at End of Period		0
Commercial and industrial loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	18,743	22,584	25,013
Charge-offs	(17,872)	(18,447)	(10,841)
Recoveries	2,659	3,050	4,565
Provision for Credit Losses	15,095	11,556	3,847
Balance at End of Period	18,602	18,743	22,584
Commercial and industrial loans | Impact of ASC 326 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	(23)
Balance at End of Period		(23)
Residential real estate | Residential real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	18,666	22,406	28,491
Charge-offs	(313)	(555)	(1,664)
Recoveries	610	1,019	1,767
Provision for Credit Losses	657	(4,204)	(6,188)
Balance at End of Period	19,622	18,666	22,406
Residential real estate | Residential real estate | Impact of ASC 326 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	2
Balance at End of Period		2
Consumer loans | Home equity
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	2,173	4,006	6,482
Charge-offs	(88)	(166)	(334)
Recoveries	519	283	335
Provision for Credit Losses	(589)	(1,950)	(2,477)
Balance at End of Period	2,015	2,173	4,006
Consumer loans | Home equity | Impact of ASC 326 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	0
Balance at End of Period		0
Consumer loans | Consumer other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	12,188	2,914	8,059
Charge-offs	(10,429)	(2,215)	(1,578)
Recoveries	1,586	505	761
Provision for Credit Losses	9,153	10,984	(4,328)
Balance at End of Period	12,094	12,188	$ 2,914
Consumer loans | Consumer other | Impact of ASC 326 adoption
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Period	$ (404)
Balance at End of Period		$ (404)

LOANS AND RELATED ALLOWANCE F_6

LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES - Schedule of Allowance for Credit Losses on Unfunded Loan Commitments, Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Beginning balance, allowance for credit losses	$ 8,588	$ 7,043	$ 7,629
Expense for credit losses	668	1,545	(586)
Ending balance, allowance for credit losses	$ 9,256	$ 8,588	$ 7,043

LOANS AND RELATED ALLOWANCE F_7

LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES - Schedule of Loans by Risk Rating (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current period gross write-offs
Total	$ 29,257	$ 28,058	$ 31,018
Payment performance
Total	9,039,686	8,335,309
Commercial loans | Construction
Current period gross write-offs
Write-offs, originated in current year	0
Write-offs, originated in prior year	0
Write-offs, originated two years before current year	0
Write-offs, originated three years before current year	0
Write-offs, originated four years before current year	0
Write-offs, originated five years before current year	1
Write-offs, Revolving Loans Amortized Cost Basis	0
Write-offs, Revolving Loans Converted to Term	0
Total	1	0	0
Payment performance
Loans originated in current fiscal year	104,507	153,393
Loans originated in fiscal year before current fiscal year	346,419	133,708
Loans originated two years before current fiscal year	156,626	25,634
Loans originated three years before current fiscal year	29,176	3,432
Loans originated four years before current fiscal year	2,545	1,361
Prior	1,098	1,924
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	640,371	319,452
Commercial loans | Commercial multifamily
Current period gross write-offs
Write-offs, originated in current year	0
Write-offs, originated in prior year	0
Write-offs, originated two years before current year	0
Write-offs, originated three years before current year	0
Write-offs, originated four years before current year	0
Write-offs, originated five years before current year	0
Write-offs, Revolving Loans Amortized Cost Basis	0
Write-offs, Revolving Loans Converted to Term	0
Total	0	94	404
Payment performance
Loans originated in current fiscal year	16,020	205,124
Loans originated in fiscal year before current fiscal year	216,477	61,032
Loans originated two years before current fiscal year	57,059	30,211
Loans originated three years before current fiscal year	29,120	100,696
Loans originated four years before current fiscal year	94,733	73,187
Prior	185,359	149,633
Revolving Loans Amortized Cost Basis	377	205
Revolving Loans Converted to Term	0	0
Total	599,145	620,088
Commercial real estate loans | Commercial real estate owner occupied
Current period gross write-offs
Write-offs, originated in current year	0
Write-offs, originated in prior year	0
Write-offs, originated two years before current year	0
Write-offs, originated three years before current year	380
Write-offs, originated four years before current year	0
Write-offs, originated five years before current year	109
Write-offs, Revolving Loans Amortized Cost Basis	0
Write-offs, Revolving Loans Converted to Term	0
Total	489	687	1,640
Payment performance
Loans originated in current fiscal year	97,271	132,099
Loans originated in fiscal year before current fiscal year	120,327	127,392
Loans originated two years before current fiscal year	122,656	59,253
Loans originated three years before current fiscal year	38,183	82,858
Loans originated four years before current fiscal year	75,096	76,378
Prior	172,460	159,045
Revolving Loans Amortized Cost Basis	2,653	3,464
Revolving Loans Converted to Term	0	0
Total	628,646	640,489
Commercial real estate loans | Commercial real estate non-owner occupied
Current period gross write-offs
Write-offs, originated in current year	0
Write-offs, originated in prior year	0
Write-offs, originated two years before current year	0
Write-offs, originated three years before current year	0
Write-offs, originated four years before current year	0
Write-offs, originated five years before current year	65
Write-offs, Revolving Loans Amortized Cost Basis	0
Write-offs, Revolving Loans Converted to Term	0
Total	65	5,894	14,557
Payment performance
Loans originated in current fiscal year	404,687	621,685
Loans originated in fiscal year before current fiscal year	591,897	410,359
Loans originated two years before current fiscal year	385,247	182,693
Loans originated three years before current fiscal year	142,177	347,406
Loans originated four years before current fiscal year	310,818	348,734
Prior	767,030	567,514
Revolving Loans Amortized Cost Basis	4,553	17,846
Revolving Loans Converted to Term	0	0
Total	2,606,409	2,496,237
Commercial and industrial loans
Current period gross write-offs
Write-offs, originated in current year	0
Write-offs, originated in prior year	1,154
Write-offs, originated two years before current year	863
Write-offs, originated three years before current year	2,763
Write-offs, originated four years before current year	1,496
Write-offs, originated five years before current year	9,283
Write-offs, Revolving Loans Amortized Cost Basis	2,313
Write-offs, Revolving Loans Converted to Term	0
Total	17,872	18,447	10,841
Payment performance
Loans originated in current fiscal year	143,904	282,985
Loans originated in fiscal year before current fiscal year	227,036	153,377
Loans originated two years before current fiscal year	133,628	61,810
Loans originated three years before current fiscal year	72,478	77,446
Loans originated four years before current fiscal year	43,832	96,706
Prior	126,661	103,134
Revolving Loans Amortized Cost Basis	611,710	669,778
Revolving Loans Converted to Term	0	0
Total	1,359,249	1,445,236
Residential real estate | Residential real estate
Current period gross write-offs
Write-offs, originated in current year	0
Write-offs, originated in prior year	50
Write-offs, originated two years before current year	0
Write-offs, originated three years before current year	50
Write-offs, originated four years before current year	174
Write-offs, originated five years before current year	39
Write-offs, Revolving Loans Amortized Cost Basis	0
Write-offs, Revolving Loans Converted to Term	0
Total	313	555	1,664
Payment performance
Loans originated in current fiscal year	599,124	997,981
Loans originated in fiscal year before current fiscal year	973,160	280,956
Loans originated two years before current fiscal year	267,231	96,996
Loans originated three years before current fiscal year	88,681	71,973
Loans originated four years before current fiscal year	67,551	140,953
Prior	764,484	723,423
Revolving Loans Amortized Cost Basis	81	165
Revolving Loans Converted to Term	0	0
Total	2,760,312	2,312,447
Consumer loans | Home equity
Current period gross write-offs
Write-offs, originated in current year	0
Write-offs, originated in prior year	0
Write-offs, originated two years before current year	0
Write-offs, originated three years before current year	70
Write-offs, originated four years before current year	0
Write-offs, originated five years before current year	0
Write-offs, Revolving Loans Amortized Cost Basis	18
Write-offs, Revolving Loans Converted to Term	0
Total	88	166	334
Payment performance
Loans originated in current fiscal year	0	0
Loans originated in fiscal year before current fiscal year	0	114
Loans originated two years before current fiscal year	0	454
Loans originated three years before current fiscal year	439	0
Loans originated four years before current fiscal year	0	0
Prior	2,614	17
Revolving Loans Amortized Cost Basis	221,170	226,865
Revolving Loans Converted to Term	0	0
Total	224,223	227,450
Consumer loans | Consumer other
Current period gross write-offs
Write-offs, originated in current year	109
Write-offs, originated in prior year	8,843
Write-offs, originated two years before current year	1,149
Write-offs, originated three years before current year	11
Write-offs, originated four years before current year	78
Write-offs, originated five years before current year	239
Write-offs, Revolving Loans Amortized Cost Basis	0
Write-offs, Revolving Loans Converted to Term	0
Total	10,429	2,215	$ 1,578
Payment performance
Loans originated in current fiscal year	49,665	161,745
Loans originated in fiscal year before current fiscal year	108,388	28,416
Loans originated two years before current fiscal year	19,726	8,356
Loans originated three years before current fiscal year	5,869	12,950
Loans originated four years before current fiscal year	7,164	28,085
Prior	19,871	25,249
Revolving Loans Amortized Cost Basis	10,648	9,109
Revolving Loans Converted to Term	0	0
Total	221,331	273,910
Pass | Commercial loans | Construction
Payment performance
Loans originated in current fiscal year	104,507	153,393
Loans originated in fiscal year before current fiscal year	346,419	133,708
Loans originated two years before current fiscal year	138,802	25,634
Loans originated three years before current fiscal year	29,176	3,432
Loans originated four years before current fiscal year	2,545	1,361
Prior	1,098	1,924
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	622,547	319,452
Pass | Commercial loans | Commercial multifamily
Payment performance
Loans originated in current fiscal year	16,020	205,124
Loans originated in fiscal year before current fiscal year	216,477	61,032
Loans originated two years before current fiscal year	56,817	27,583
Loans originated three years before current fiscal year	26,566	100,696
Loans originated four years before current fiscal year	94,733	67,675
Prior	179,923	149,633
Revolving Loans Amortized Cost Basis	377	205
Revolving Loans Converted to Term	0	0
Total	590,913	611,948
Pass | Commercial real estate loans | Commercial real estate owner occupied
Payment performance
Loans originated in current fiscal year	97,271	131,096
Loans originated in fiscal year before current fiscal year	120,327	127,270
Loans originated two years before current fiscal year	122,151	58,835
Loans originated three years before current fiscal year	37,914	82,576
Loans originated four years before current fiscal year	70,393	75,322
Prior	165,224	154,056
Revolving Loans Amortized Cost Basis	2,653	3,464
Revolving Loans Converted to Term	0	0
Total	615,933	632,619
Pass | Commercial real estate loans | Commercial real estate non-owner occupied
Payment performance
Loans originated in current fiscal year	404,687	621,685
Loans originated in fiscal year before current fiscal year	591,897	410,359
Loans originated two years before current fiscal year	385,247	175,456
Loans originated three years before current fiscal year	135,134	333,783
Loans originated four years before current fiscal year	277,870	313,124
Prior	736,566	530,322
Revolving Loans Amortized Cost Basis	4,553	17,846
Revolving Loans Converted to Term	0	0
Total	2,535,954	2,402,575
Pass | Commercial and industrial loans
Payment performance
Loans originated in current fiscal year	142,946	282,781
Loans originated in fiscal year before current fiscal year	203,126	147,070
Loans originated two years before current fiscal year	118,191	56,880
Loans originated three years before current fiscal year	69,722	67,975
Loans originated four years before current fiscal year	39,437	83,223
Prior	112,770	99,367
Revolving Loans Amortized Cost Basis	554,153	648,956
Revolving Loans Converted to Term	0	0
Total	1,240,345	1,386,252
Pass | Residential real estate | Residential real estate
Payment performance
Loans originated in current fiscal year	599,124	997,981
Loans originated in fiscal year before current fiscal year	973,031	280,308
Loans originated two years before current fiscal year	266,055	96,548
Loans originated three years before current fiscal year	88,302	70,845
Loans originated four years before current fiscal year	66,837	138,894
Prior	755,372	713,744
Revolving Loans Amortized Cost Basis	81	165
Revolving Loans Converted to Term	0	0
Total	2,748,802	2,298,485
Special Mention | Commercial loans | Construction
Payment performance
Loans originated in current fiscal year	0	0
Loans originated in fiscal year before current fiscal year	0	0
Loans originated two years before current fiscal year	512	0
Loans originated three years before current fiscal year	0	0
Loans originated four years before current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	512	0
Special Mention | Commercial loans | Commercial multifamily
Payment performance
Loans originated in current fiscal year	0	0
Loans originated in fiscal year before current fiscal year	0	0
Loans originated two years before current fiscal year	0	2,628
Loans originated three years before current fiscal year	0	0
Loans originated four years before current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	2,628
Special Mention | Commercial real estate loans | Commercial real estate owner occupied
Payment performance
Loans originated in current fiscal year	0	0
Loans originated in fiscal year before current fiscal year	0	0
Loans originated two years before current fiscal year	424	387
Loans originated three years before current fiscal year	222	0
Loans originated four years before current fiscal year	0	0
Prior	788	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	1,434	387
Special Mention | Commercial real estate loans | Commercial real estate non-owner occupied
Payment performance
Loans originated in current fiscal year	0	0
Loans originated in fiscal year before current fiscal year	0	0
Loans originated two years before current fiscal year	0	0
Loans originated three years before current fiscal year	229	0
Loans originated four years before current fiscal year	19,465	20,000
Prior	726	18,462
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	20,420	38,462
Special Mention | Commercial and industrial loans
Payment performance
Loans originated in current fiscal year	526	0
Loans originated in fiscal year before current fiscal year	23,149	5,811
Loans originated two years before current fiscal year	3,735	1,290
Loans originated three years before current fiscal year	1,621	1,332
Loans originated four years before current fiscal year	610	11,502
Prior	1,353	912
Revolving Loans Amortized Cost Basis	35,244	2,632
Revolving Loans Converted to Term	0	0
Total	66,238	23,479
Special Mention | Residential real estate | Residential real estate
Payment performance
Loans originated in current fiscal year	0	0
Loans originated in fiscal year before current fiscal year	0	364
Loans originated two years before current fiscal year	0	0
Loans originated three years before current fiscal year	0	861
Loans originated four years before current fiscal year	140	202
Prior	664	707
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	804	2,134
Substandard | Commercial loans | Construction
Payment performance
Loans originated in current fiscal year	0	0
Loans originated in fiscal year before current fiscal year	0	0
Loans originated two years before current fiscal year	17,312	0
Loans originated three years before current fiscal year	0	0
Loans originated four years before current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	17,312	0
Substandard | Commercial loans | Commercial multifamily
Payment performance
Loans originated in current fiscal year	0	0
Loans originated in fiscal year before current fiscal year	0	0
Loans originated two years before current fiscal year	242	0
Loans originated three years before current fiscal year	2,554	0
Loans originated four years before current fiscal year	0	5,512
Prior	5,436	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	8,232	5,512
Substandard | Commercial real estate loans | Commercial real estate owner occupied
Payment performance
Loans originated in current fiscal year	0	1,003
Loans originated in fiscal year before current fiscal year	0	122
Loans originated two years before current fiscal year	81	31
Loans originated three years before current fiscal year	47	282
Loans originated four years before current fiscal year	4,703	1,056
Prior	6,448	4,989
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	11,279	7,483
Substandard | Commercial real estate loans | Commercial real estate non-owner occupied
Payment performance
Loans originated in current fiscal year	0	0
Loans originated in fiscal year before current fiscal year	0	0
Loans originated two years before current fiscal year	0	7,237
Loans originated three years before current fiscal year	6,814	13,623
Loans originated four years before current fiscal year	13,483	15,610
Prior	29,738	18,730
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	50,035	55,200
Substandard | Commercial and industrial loans
Payment performance
Loans originated in current fiscal year	432	204
Loans originated in fiscal year before current fiscal year	761	496
Loans originated two years before current fiscal year	11,702	3,640
Loans originated three years before current fiscal year	1,135	8,139
Loans originated four years before current fiscal year	3,785	1,981
Prior	12,538	2,799
Revolving Loans Amortized Cost Basis	22,313	10,581
Revolving Loans Converted to Term	0	0
Total	52,666	27,840
Substandard | Residential real estate | Residential real estate
Payment performance
Loans originated in current fiscal year	0	0
Loans originated in fiscal year before current fiscal year	129	284
Loans originated two years before current fiscal year	1,176	448
Loans originated three years before current fiscal year	379	267
Loans originated four years before current fiscal year	574	1,857
Prior	8,448	8,972
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	10,706	11,828
Doubtful | Commercial and industrial loans
Payment performance
Loans originated in current fiscal year		0
Loans originated in fiscal year before current fiscal year		0
Loans originated two years before current fiscal year		0
Loans originated three years before current fiscal year		0
Loans originated four years before current fiscal year		0
Prior		56
Revolving Loans Amortized Cost Basis		7,609
Revolving Loans Converted to Term		0
Total		7,665
Performing | Consumer loans | Home equity
Payment performance
Loans originated in current fiscal year	0	0
Loans originated in fiscal year before current fiscal year	0	114
Loans originated two years before current fiscal year	0	454
Loans originated three years before current fiscal year	439	0
Loans originated four years before current fiscal year	0	0
Prior	2,614	17
Revolving Loans Amortized Cost Basis	220,209	224,746
Revolving Loans Converted to Term	0	0
Total	223,262	225,331
Performing | Consumer loans | Consumer other
Payment performance
Loans originated in current fiscal year	49,588	161,157
Loans originated in fiscal year before current fiscal year	108,284	28,279
Loans originated two years before current fiscal year	19,679	8,312
Loans originated three years before current fiscal year	5,843	12,670
Loans originated four years before current fiscal year	7,054	27,608
Prior	19,587	24,682
Revolving Loans Amortized Cost Basis	10,614	9,070
Revolving Loans Converted to Term	0	0
Total	220,649	271,778
Performing | Special Mention
Payment performance
Total	91,502	68,127
Performing | Substandard
Payment performance
Total	131,689	88,665
Nonperforming | Consumer loans | Home equity
Payment performance
Loans originated in current fiscal year	0	0
Loans originated in fiscal year before current fiscal year	0	0
Loans originated two years before current fiscal year	0	0
Loans originated three years before current fiscal year	0	0
Loans originated four years before current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	961	2,119
Revolving Loans Converted to Term	0	0
Total	961	2,119
Nonperforming | Consumer loans | Consumer other
Payment performance
Loans originated in current fiscal year	77	588
Loans originated in fiscal year before current fiscal year	104	137
Loans originated two years before current fiscal year	47	44
Loans originated three years before current fiscal year	26	280
Loans originated four years before current fiscal year	110	477
Prior	284	567
Revolving Loans Amortized Cost Basis	34	39
Revolving Loans Converted to Term	0	0
Total	$ 682	$ 2,132

LOANS AND RELATED ALLOWANCE F_8

LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES - Schedule of Total Loans Rated Special Mention or Lower (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Allowance for loan losses
Financing receivable, before allowance for credit loss	$ 9,039,686	$ 8,335,309
Total Criticized | Performing
Allowance for loan losses
Financing receivable, before allowance for credit loss	244,598	187,906
Total Classified | Performing
Allowance for loan losses
Financing receivable, before allowance for credit loss	153,096	119,779
Nonaccrual | Performing
Allowance for loan losses
Financing receivable, before allowance for credit loss	21,407	31,114
Substandard Accruing | Performing
Allowance for loan losses
Financing receivable, before allowance for credit loss	131,689	88,665
Special Mention | Performing
Allowance for loan losses
Financing receivable, before allowance for credit loss	$ 91,502	$ 68,127

LOANS AND RELATED ALLOWANCE F_9

LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES - Schedule of Past Due Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Allowance for loan losses
Total loans	$ 9,039,686	$ 8,335,309
Commercial loans | Construction
Allowance for loan losses
Total loans	640,371	319,452
Commercial loans | Commercial multifamily
Allowance for loan losses
Total loans	599,145	620,088
Commercial real estate loans | Commercial real estate owner occupied
Allowance for loan losses
Total loans	628,646	640,489
Commercial real estate loans | Commercial real estate non-owner occupied
Allowance for loan losses
Total loans	2,606,409	2,496,237
Commercial and industrial loans
Allowance for loan losses
Total loans	1,359,249	1,445,236
Commercial and industrial loans | Commercial and industrial
Allowance for loan losses
Total loans	1,359,249
Residential real estate | Residential real estate
Allowance for loan losses
Total loans	2,760,312	2,312,447
Consumer loans | Home equity
Allowance for loan losses
Total loans	224,223	227,450
Consumer loans | Consumer other
Allowance for loan losses
Total loans	221,331	273,910
Total Past Due
Allowance for loan losses
Total loans	49,085	50,313
Total Past Due | Commercial loans | Construction
Allowance for loan losses
Total loans	0	0
Total Past Due | Commercial loans | Commercial multifamily
Allowance for loan losses
Total loans	5,623	214
Total Past Due | Commercial real estate loans | Commercial real estate owner occupied
Allowance for loan losses
Total loans	1,671	3,424
Total Past Due | Commercial real estate loans | Commercial real estate non-owner occupied
Allowance for loan losses
Total loans	4,188	334
Total Past Due | Commercial and industrial loans
Allowance for loan losses
Total loans		21,269
Total Past Due | Commercial and industrial loans | Commercial and industrial
Allowance for loan losses
Total loans	12,207
Total Past Due | Residential real estate | Residential real estate
Allowance for loan losses
Total loans	17,299	17,552
Total Past Due | Consumer loans | Home equity
Allowance for loan losses
Total loans	2,486	2,344
Total Past Due | Consumer loans | Consumer other
Allowance for loan losses
Total loans	5,611	5,176
30-59 Days Past Due
Allowance for loan losses
Total loans	17,644	7,290
30-59 Days Past Due | Commercial loans | Construction
Allowance for loan losses
Total loans	0	0
30-59 Days Past Due | Commercial loans | Commercial multifamily
Allowance for loan losses
Total loans	5,436	0
30-59 Days Past Due | Commercial real estate loans | Commercial real estate owner occupied
Allowance for loan losses
Total loans	581	122
30-59 Days Past Due | Commercial real estate loans | Commercial real estate non-owner occupied
Allowance for loan losses
Total loans	139	143
30-59 Days Past Due | Commercial and industrial loans
Allowance for loan losses
Total loans		1,173
30-59 Days Past Due | Commercial and industrial loans | Commercial and industrial
Allowance for loan losses
Total loans	2,749
30-59 Days Past Due | Residential real estate | Residential real estate
Allowance for loan losses
Total loans	5,669	3,694
30-59 Days Past Due | Consumer loans | Home equity
Allowance for loan losses
Total loans	707	168
30-59 Days Past Due | Consumer loans | Consumer other
Allowance for loan losses
Total loans	2,363	1,990
60-89 Days Past Due
Allowance for loan losses
Total loans	4,496	4,871
60-89 Days Past Due | Commercial loans | Construction
Allowance for loan losses
Total loans	0	0
60-89 Days Past Due | Commercial loans | Commercial multifamily
Allowance for loan losses
Total loans	187	214
60-89 Days Past Due | Commercial real estate loans | Commercial real estate owner occupied
Allowance for loan losses
Total loans	286	0
60-89 Days Past Due | Commercial real estate loans | Commercial real estate non-owner occupied
Allowance for loan losses
Total loans	251	0
60-89 Days Past Due | Commercial and industrial loans
Allowance for loan losses
Total loans		1,438
60-89 Days Past Due | Commercial and industrial loans | Commercial and industrial
Allowance for loan losses
Total loans	689
60-89 Days Past Due | Residential real estate | Residential real estate
Allowance for loan losses
Total loans	943	2,134
60-89 Days Past Due | Consumer loans | Home equity
Allowance for loan losses
Total loans	498	57
60-89 Days Past Due | Consumer loans | Consumer other
Allowance for loan losses
Total loans	1,642	1,028
90 Days or Greater Past Due
Allowance for loan losses
Total loans	26,945	38,152
90 Days or Greater Past Due | Commercial loans | Construction
Allowance for loan losses
Total loans	0	0
90 Days or Greater Past Due | Commercial loans | Commercial multifamily
Allowance for loan losses
Total loans	0	0
90 Days or Greater Past Due | Commercial real estate loans | Commercial real estate owner occupied
Allowance for loan losses
Total loans	804	3,302
90 Days or Greater Past Due | Commercial real estate loans | Commercial real estate non-owner occupied
Allowance for loan losses
Total loans	3,798	191
90 Days or Greater Past Due | Commercial and industrial loans
Allowance for loan losses
Total loans		18,658
90 Days or Greater Past Due | Commercial and industrial loans | Commercial and industrial
Allowance for loan losses
Total loans	8,769
90 Days or Greater Past Due | Residential real estate | Residential real estate
Allowance for loan losses
Total loans	10,687	11,724
90 Days or Greater Past Due | Consumer loans | Home equity
Allowance for loan losses
Total loans	1,281	2,119
90 Days or Greater Past Due | Consumer loans | Consumer other
Allowance for loan losses
Total loans	1,606	2,158
Current
Allowance for loan losses
Total loans	8,990,601	8,284,996
Current | Commercial loans | Construction
Allowance for loan losses
Total loans	640,371	319,452
Current | Commercial loans | Commercial multifamily
Allowance for loan losses
Total loans	593,522	619,874
Current | Commercial real estate loans | Commercial real estate owner occupied
Allowance for loan losses
Total loans	626,975	637,065
Current | Commercial real estate loans | Commercial real estate non-owner occupied
Allowance for loan losses
Total loans	2,602,221	2,495,903
Current | Commercial and industrial loans
Allowance for loan losses
Total loans		1,423,967
Current | Commercial and industrial loans | Commercial and industrial
Allowance for loan losses
Total loans	1,347,042
Current | Residential real estate | Residential real estate
Allowance for loan losses
Total loans	2,743,013	2,294,895
Current | Consumer loans | Home equity
Allowance for loan losses
Total loans	221,737	225,106
Current | Consumer loans | Consumer other
Allowance for loan losses
Total loans	$ 215,720	$ 268,734

LOANS AND RELATED ALLOWANCE _10

LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES - Schedule of Information Pertaining to Non-accrual Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Allowance for loan losses
Nonaccrual Amortized Cost	$ 21,407	$ 31,114
Nonaccrual With No Related Allowance	8,834	21,404
Past Due 90 Days or Greater and Accruing	5,538	7,038
Interest Income Recognized on Nonaccrual	0	0
Construction and commercial multifamily | Construction
Allowance for loan losses
Nonaccrual Amortized Cost	0	0
Nonaccrual With No Related Allowance	0	0
Past Due 90 Days or Greater and Accruing	0	0
Interest Income Recognized on Nonaccrual	0	0
Construction and commercial multifamily | Commercial multifamily
Allowance for loan losses
Nonaccrual Amortized Cost	0	0
Nonaccrual With No Related Allowance	0	0
Past Due 90 Days or Greater and Accruing	0	0
Interest Income Recognized on Nonaccrual	0	0
Commercial real estate loans | Commercial real estate owner occupied
Allowance for loan losses
Nonaccrual Amortized Cost	605	2,202
Nonaccrual With No Related Allowance	285	1,411
Past Due 90 Days or Greater and Accruing	199	1,100
Interest Income Recognized on Nonaccrual	0	0
Commercial real estate loans | Commercial real estate non-owner occupied
Allowance for loan losses
Nonaccrual Amortized Cost	3,798	191
Nonaccrual With No Related Allowance	45	73
Past Due 90 Days or Greater and Accruing	0	0
Interest Income Recognized on Nonaccrual	0	0
Commercial and industrial loans
Allowance for loan losses
Nonaccrual Amortized Cost	8,665	16,992
Nonaccrual With No Related Allowance	5,586	14,223
Past Due 90 Days or Greater and Accruing	104	1,666
Interest Income Recognized on Nonaccrual	0	0
Residential real estate | Residential real estate
Allowance for loan losses
Nonaccrual Amortized Cost	6,696	8,901
Nonaccrual With No Related Allowance	2,796	5,307
Past Due 90 Days or Greater and Accruing	3,991	2,823
Interest Income Recognized on Nonaccrual	0	0
Consumer loans | Home equity
Allowance for loan losses
Nonaccrual Amortized Cost	961	1,568
Nonaccrual With No Related Allowance	122	388
Past Due 90 Days or Greater and Accruing	320	551
Interest Income Recognized on Nonaccrual	0	0
Consumer loans | Consumer other
Allowance for loan losses
Nonaccrual Amortized Cost	682	1,260
Nonaccrual With No Related Allowance	0	2
Past Due 90 Days or Greater and Accruing	924	898
Interest Income Recognized on Nonaccrual	$ 0	$ 0

LOANS AND RELATED ALLOWANCE _11

LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES - Schedule of Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Allowance for loan losses
Nonaccrual Amortized Cost	$ 21,407	$ 31,114
Real Estate
Allowance for loan losses
Nonaccrual Amortized Cost	10,990	7,878
Investment Securities/Cash
Allowance for loan losses
Nonaccrual Amortized Cost	0	0
Other
Allowance for loan losses
Nonaccrual Amortized Cost	944	16,931
Construction and commercial multifamily | Construction
Allowance for loan losses
Nonaccrual Amortized Cost	0	0
Construction and commercial multifamily | Construction | Real Estate
Allowance for loan losses
Nonaccrual Amortized Cost	0	0
Construction and commercial multifamily | Construction | Investment Securities/Cash
Allowance for loan losses
Nonaccrual Amortized Cost	0	0
Construction and commercial multifamily | Construction | Other
Allowance for loan losses
Nonaccrual Amortized Cost	0	0
Construction and commercial multifamily | Commercial multifamily
Allowance for loan losses
Nonaccrual Amortized Cost	0	0
Construction and commercial multifamily | Commercial multifamily | Real Estate
Allowance for loan losses
Nonaccrual Amortized Cost	0	0
Construction and commercial multifamily | Commercial multifamily | Investment Securities/Cash
Allowance for loan losses
Nonaccrual Amortized Cost	0	0
Construction and commercial multifamily | Commercial multifamily | Other
Allowance for loan losses
Nonaccrual Amortized Cost	0	0
Commercial real estate loans | Commercial real estate owner occupied
Allowance for loan losses
Nonaccrual Amortized Cost	605	2,202
Commercial real estate loans | Commercial real estate owner occupied | Real Estate
Allowance for loan losses
Nonaccrual Amortized Cost	650	2,793
Commercial real estate loans | Commercial real estate owner occupied | Investment Securities/Cash
Allowance for loan losses
Nonaccrual Amortized Cost	0	0
Commercial real estate loans | Commercial real estate owner occupied | Other
Allowance for loan losses
Nonaccrual Amortized Cost	0	0
Commercial real estate loans | Commercial real estate non-owner occupied
Allowance for loan losses
Nonaccrual Amortized Cost	3,798	191
Commercial real estate loans | Commercial real estate non-owner occupied | Real Estate
Allowance for loan losses
Nonaccrual Amortized Cost	342	384
Commercial real estate loans | Commercial real estate non-owner occupied | Investment Securities/Cash
Allowance for loan losses
Nonaccrual Amortized Cost	0	0
Commercial real estate loans | Commercial real estate non-owner occupied | Other
Allowance for loan losses
Nonaccrual Amortized Cost	0	0
Commercial and industrial loans
Allowance for loan losses
Nonaccrual Amortized Cost	8,665	16,992
Commercial and industrial loans | Real Estate
Allowance for loan losses
Nonaccrual Amortized Cost	4,788	288
Commercial and industrial loans | Investment Securities/Cash
Allowance for loan losses
Nonaccrual Amortized Cost	0	0
Commercial and industrial loans | Other
Allowance for loan losses
Nonaccrual Amortized Cost	944	16,931
Residential real estate | Residential real estate
Allowance for loan losses
Nonaccrual Amortized Cost	6,696	8,901
Residential real estate | Residential real estate | Real Estate
Allowance for loan losses
Nonaccrual Amortized Cost	5,035	3,910
Residential real estate | Residential real estate | Investment Securities/Cash
Allowance for loan losses
Nonaccrual Amortized Cost	0	0
Residential real estate | Residential real estate | Other
Allowance for loan losses
Nonaccrual Amortized Cost	0	0
Consumer loans | Home equity
Allowance for loan losses
Nonaccrual Amortized Cost	961	1,568
Consumer loans | Home equity | Real Estate
Allowance for loan losses
Nonaccrual Amortized Cost	135	501
Consumer loans | Home equity | Investment Securities/Cash
Allowance for loan losses
Nonaccrual Amortized Cost	0	0
Consumer loans | Home equity | Other
Allowance for loan losses
Nonaccrual Amortized Cost	0	0
Consumer loans | Consumer other
Allowance for loan losses
Nonaccrual Amortized Cost	682	1,260
Consumer loans | Consumer other | Real Estate
Allowance for loan losses
Nonaccrual Amortized Cost	40	2
Consumer loans | Consumer other | Investment Securities/Cash
Allowance for loan losses
Nonaccrual Amortized Cost	0	0
Consumer loans | Consumer other | Other
Allowance for loan losses
Nonaccrual Amortized Cost	$ 0	$ 0

LOANS AND ALLOWANCE FOR CREDIT

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Amortized Cost Basis of Loans (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Principal Forgiveness
Allowance for loan losses
Amortized cost basis	$ 0
Payment Delay
Allowance for loan losses
Amortized cost basis	34
Term Extension
Allowance for loan losses
Amortized cost basis	27,681
Interest Rate Reduction
Allowance for loan losses
Amortized cost basis	0
Combination Term Extension and Principal Forgiveness
Allowance for loan losses
Amortized cost basis	0
Combination Term Extension and Interest Rate Reduction
Allowance for loan losses
Amortized cost basis	$ 3,609
Total Class of Financing Receivable	0.35%
Commercial loans | Construction | Principal Forgiveness
Allowance for loan losses
Amortized cost basis	$ 0
Commercial loans | Construction | Payment Delay
Allowance for loan losses
Amortized cost basis	0
Commercial loans | Construction | Term Extension
Allowance for loan losses
Amortized cost basis	0
Commercial loans | Construction | Interest Rate Reduction
Allowance for loan losses
Amortized cost basis	0
Commercial loans | Construction | Combination Term Extension and Principal Forgiveness
Allowance for loan losses
Amortized cost basis	0
Commercial loans | Construction | Combination Term Extension and Interest Rate Reduction
Allowance for loan losses
Amortized cost basis	$ 0
Total Class of Financing Receivable	0%
Commercial loans | Commercial multifamily | Principal Forgiveness
Allowance for loan losses
Amortized cost basis	$ 0
Commercial loans | Commercial multifamily | Payment Delay
Allowance for loan losses
Amortized cost basis	0
Commercial loans | Commercial multifamily | Term Extension
Allowance for loan losses
Amortized cost basis	0
Commercial loans | Commercial multifamily | Interest Rate Reduction
Allowance for loan losses
Amortized cost basis	0
Commercial loans | Commercial multifamily | Combination Term Extension and Principal Forgiveness
Allowance for loan losses
Amortized cost basis	0
Commercial loans | Commercial multifamily | Combination Term Extension and Interest Rate Reduction
Allowance for loan losses
Amortized cost basis	$ 0
Total Class of Financing Receivable	0%
Commercial real estate loans | Commercial real estate owner occupied | Principal Forgiveness
Allowance for loan losses
Amortized cost basis	$ 0
Commercial real estate loans | Commercial real estate owner occupied | Payment Delay
Allowance for loan losses
Amortized cost basis	0
Commercial real estate loans | Commercial real estate owner occupied | Term Extension
Allowance for loan losses
Amortized cost basis	222
Commercial real estate loans | Commercial real estate owner occupied | Interest Rate Reduction
Allowance for loan losses
Amortized cost basis	0
Commercial real estate loans | Commercial real estate owner occupied | Combination Term Extension and Principal Forgiveness
Allowance for loan losses
Amortized cost basis	0
Commercial real estate loans | Commercial real estate owner occupied | Combination Term Extension and Interest Rate Reduction
Allowance for loan losses
Amortized cost basis	$ 0
Total Class of Financing Receivable	0.04%
Commercial real estate loans | Commercial real estate non-owner occupied | Principal Forgiveness
Allowance for loan losses
Amortized cost basis	$ 0
Commercial real estate loans | Commercial real estate non-owner occupied | Payment Delay
Allowance for loan losses
Amortized cost basis	0
Commercial real estate loans | Commercial real estate non-owner occupied | Term Extension
Allowance for loan losses
Amortized cost basis	11,454
Commercial real estate loans | Commercial real estate non-owner occupied | Interest Rate Reduction
Allowance for loan losses
Amortized cost basis	0
Commercial real estate loans | Commercial real estate non-owner occupied | Combination Term Extension and Principal Forgiveness
Allowance for loan losses
Amortized cost basis	0
Commercial real estate loans | Commercial real estate non-owner occupied | Combination Term Extension and Interest Rate Reduction
Allowance for loan losses
Amortized cost basis	$ 3,600
Total Class of Financing Receivable	0.58%
Commercial and industrial loans | Principal Forgiveness
Allowance for loan losses
Amortized cost basis	$ 0
Commercial and industrial loans | Payment Delay
Allowance for loan losses
Amortized cost basis	34
Commercial and industrial loans | Term Extension
Allowance for loan losses
Amortized cost basis	16,005
Commercial and industrial loans | Interest Rate Reduction
Allowance for loan losses
Amortized cost basis	0
Commercial and industrial loans | Combination Term Extension and Principal Forgiveness
Allowance for loan losses
Amortized cost basis	0
Commercial and industrial loans | Combination Term Extension and Interest Rate Reduction
Allowance for loan losses
Amortized cost basis	$ 9
Total Class of Financing Receivable	1.18%
Residential real estate | Residential real estate | Principal Forgiveness
Allowance for loan losses
Amortized cost basis	$ 0
Residential real estate | Residential real estate | Payment Delay
Allowance for loan losses
Amortized cost basis	0
Residential real estate | Residential real estate | Term Extension
Allowance for loan losses
Amortized cost basis	0
Residential real estate | Residential real estate | Interest Rate Reduction
Allowance for loan losses
Amortized cost basis	0
Residential real estate | Residential real estate | Combination Term Extension and Principal Forgiveness
Allowance for loan losses
Amortized cost basis	0
Residential real estate | Residential real estate | Combination Term Extension and Interest Rate Reduction
Allowance for loan losses
Amortized cost basis	$ 0
Total Class of Financing Receivable	0%
Consumer loans | Home equity | Principal Forgiveness
Allowance for loan losses
Amortized cost basis	$ 0
Consumer loans | Home equity | Payment Delay
Allowance for loan losses
Amortized cost basis	0
Consumer loans | Home equity | Term Extension
Allowance for loan losses
Amortized cost basis	0
Consumer loans | Home equity | Interest Rate Reduction
Allowance for loan losses
Amortized cost basis	0
Consumer loans | Home equity | Combination Term Extension and Principal Forgiveness
Allowance for loan losses
Amortized cost basis	0
Consumer loans | Home equity | Combination Term Extension and Interest Rate Reduction
Allowance for loan losses
Amortized cost basis	$ 0
Total Class of Financing Receivable	0%
Consumer loans | Consumer other | Principal Forgiveness
Allowance for loan losses
Amortized cost basis	$ 0
Consumer loans | Consumer other | Payment Delay
Allowance for loan losses
Amortized cost basis	0
Consumer loans | Consumer other | Term Extension
Allowance for loan losses
Amortized cost basis	0
Consumer loans | Consumer other | Interest Rate Reduction
Allowance for loan losses
Amortized cost basis	0
Consumer loans | Consumer other | Combination Term Extension and Principal Forgiveness
Allowance for loan losses
Amortized cost basis	0
Consumer loans | Consumer other | Combination Term Extension and Interest Rate Reduction
Allowance for loan losses
Amortized cost basis	$ 0
Total Class of Financing Receivable	0%

Credit Losses (Details)

Credit Losses (Details) $ in Thousands	Dec. 31, 2023 USD ($)
30-59 Days Past Due
Allowance for loan losses
Total	$ 34
60-89 Days Past Due
Allowance for loan losses
Total	0
90 Days or Greater Past Due
Allowance for loan losses
Total	0
Total Past Due
Allowance for loan losses
Total	34
Construction and commercial multifamily | Construction | 30-59 Days Past Due
Allowance for loan losses
Total	0
Construction and commercial multifamily | Construction | 60-89 Days Past Due
Allowance for loan losses
Total	0
Construction and commercial multifamily | Construction | 90 Days or Greater Past Due
Allowance for loan losses
Total	0
Construction and commercial multifamily | Construction | Total Past Due
Allowance for loan losses
Total	0
Construction and commercial multifamily | Commercial multifamily | 30-59 Days Past Due
Allowance for loan losses
Total	0
Construction and commercial multifamily | Commercial multifamily | 60-89 Days Past Due
Allowance for loan losses
Total	0
Construction and commercial multifamily | Commercial multifamily | 90 Days or Greater Past Due
Allowance for loan losses
Total	0
Construction and commercial multifamily | Commercial multifamily | Total Past Due
Allowance for loan losses
Total	0
Commercial real estate loans | Commercial real estate owner occupied | 30-59 Days Past Due
Allowance for loan losses
Total	0
Commercial real estate loans | Commercial real estate owner occupied | 60-89 Days Past Due
Allowance for loan losses
Total	0
Commercial real estate loans | Commercial real estate owner occupied | 90 Days or Greater Past Due
Allowance for loan losses
Total	0
Commercial real estate loans | Commercial real estate owner occupied | Total Past Due
Allowance for loan losses
Total	0
Commercial real estate loans | Commercial real estate non-owner occupied | 30-59 Days Past Due
Allowance for loan losses
Total	0
Commercial real estate loans | Commercial real estate non-owner occupied | 60-89 Days Past Due
Allowance for loan losses
Total	0
Commercial real estate loans | Commercial real estate non-owner occupied | 90 Days or Greater Past Due
Allowance for loan losses
Total	0
Commercial real estate loans | Commercial real estate non-owner occupied | Total Past Due
Allowance for loan losses
Total	0
Commercial and industrial loans | 30-59 Days Past Due
Allowance for loan losses
Total	34
Commercial and industrial loans | 60-89 Days Past Due
Allowance for loan losses
Total	0
Commercial and industrial loans | 90 Days or Greater Past Due
Allowance for loan losses
Total	0
Commercial and industrial loans | Total Past Due
Allowance for loan losses
Total	34
Residential real estate | Residential real estate | 30-59 Days Past Due
Allowance for loan losses
Total	0
Residential real estate | Residential real estate | 60-89 Days Past Due
Allowance for loan losses
Total	0
Residential real estate | Residential real estate | 90 Days or Greater Past Due
Allowance for loan losses
Total	0
Residential real estate | Residential real estate | Total Past Due
Allowance for loan losses
Total	0
Consumer | Home equity | 30-59 Days Past Due
Allowance for loan losses
Total	0
Consumer | Home equity | 60-89 Days Past Due
Allowance for loan losses
Total	0
Consumer | Home equity | 90 Days or Greater Past Due
Allowance for loan losses
Total	0
Consumer | Home equity | Total Past Due
Allowance for loan losses
Total	0
Consumer | Consumer other | 30-59 Days Past Due
Allowance for loan losses
Total	0
Consumer | Consumer other | 60-89 Days Past Due
Allowance for loan losses
Total	0
Consumer | Consumer other | 90 Days or Greater Past Due
Allowance for loan losses
Total	0
Consumer | Consumer other | Total Past Due
Allowance for loan losses
Total	$ 0

LOANS AND ALLOWANCE FOR CREDI_2

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Loans Modified (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Construction and commercial multifamily | Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted Average Interest Rate Reduction	0%
Weighted Average Term Extension (months)	0 months
Construction and commercial multifamily | Construction | Principal Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Principal Forgiveness	$ 0
Construction and commercial multifamily | Commercial multifamily
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted Average Interest Rate Reduction	0%
Weighted Average Term Extension (months)	0 months
Construction and commercial multifamily | Commercial multifamily | Principal Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Principal Forgiveness	$ 0
Commercial real estate loans | Commercial real estate owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted Average Interest Rate Reduction	0%
Weighted Average Term Extension (months)	120 months
Commercial real estate loans | Commercial real estate owner occupied | Principal Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Principal Forgiveness	$ 0
Commercial real estate loans | Commercial real estate non-owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted Average Interest Rate Reduction	0.05%
Weighted Average Term Extension (months)	16 months
Commercial real estate loans | Commercial real estate non-owner occupied | Principal Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Principal Forgiveness	$ 0
Commercial and industrial loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted Average Interest Rate Reduction	1.25%
Weighted Average Term Extension (months)	23 months
Commercial and industrial loans | Principal Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Principal Forgiveness	$ 0
Residential real estate | Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted Average Interest Rate Reduction	0%
Weighted Average Term Extension (months)	0 months
Residential real estate | Residential real estate | Principal Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Principal Forgiveness	$ 0
Consumer | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted Average Interest Rate Reduction	0%
Weighted Average Term Extension (months)	0 months
Consumer | Home equity | Principal Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Principal Forgiveness	$ 0
Consumer | Consumer other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted Average Interest Rate Reduction	0%
Weighted Average Term Extension (months)	0 months
Consumer | Consumer other | Principal Forgiveness
Financing Receivable, Troubled Debt Restructuring [Line Items]
Principal Forgiveness	$ 0

PREMISES AND EQUIPMENT (Details

PREMISES AND EQUIPMENT (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Premises and equipment
Premises and equipment, gross	$ 166,364	$ 180,214
Accumulated depreciation and amortization	(97,449)	(94,997)
Premises and equipment, net	68,915	85,217
Depreciation and amortization expense	8,400	9,600	$ 11,000
Land
Premises and equipment
Premises and equipment, gross	12,525	15,536
Buildings and improvements
Premises and equipment
Premises and equipment, gross	$ 89,222	99,977
Buildings and improvements | Minimum
Premises and equipment
Estimated Useful Life	5 years
Buildings and improvements | Maximum
Premises and equipment
Estimated Useful Life	39 years
Furniture and equipment
Premises and equipment
Premises and equipment, gross	$ 64,290	63,554
Furniture and equipment | Minimum
Premises and equipment
Estimated Useful Life	3 years
Furniture and equipment | Maximum
Premises and equipment
Estimated Useful Life	7 years
Construction in process
Premises and equipment
Premises and equipment, gross	$ 327	1,147
Continuing and Discontinued Operations
Premises and equipment
Premises and equipment, net	$ 68,915	$ 85,217

OTHER INTANGIBLES - Schedule of

OTHER INTANGIBLES - Schedule of Components of Other Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	$ 85,079	$ 85,079
Accumulated Amortization	(65,415)	(60,596)
Net Intangible Assets	19,664	24,483
Non-maturity deposits (core deposit intangible)
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	77,213	77,213
Accumulated Amortization	(58,965)	(54,618)
Net Intangible Assets	18,248	22,595
All other intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	7,866	7,866
Accumulated Amortization	(6,450)	(5,978)
Net Intangible Assets	$ 1,416	$ 1,888

OTHER INTANGIBLES - Narrative (

OTHER INTANGIBLES - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 4,820,000	$ 5,134,000	$ 5,200,000
Finite-lived intangible assets, amortization expense, 2024	4,600,000
Finite-lived intangible assets, amortization expense, 2025	4,500,000
Finite-lived intangible assets, amortization expense, 2026	4,500,000
Finite-lived intangible assets, amortization expense, 2027	3,600,000
Finite-lived intangible assets, amortization expense, 2028	1,800,000
Finite-lived intangible assets, amortization expense, thereafter	700,000
Impairment of intangible assets, finite-lived	$ 0	$ 0	$ 0
Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life (in years)	4 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life (in years)	15 years

OTHER ASSETS - Schedule of Othe

OTHER ASSETS - Schedule of Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Other Assets [Abstract]
Capitalized servicing rights	$ 12,095	$ 13,047	$ 16,022	$ 16,348
Accrued interest receivable	53,096	46,868
Accrued federal and state tax receivable	33,564	34,386
Right-of-use assets	47,348	46,411
Derivative assets	45,668	54,241
Deferred tax asset	110,068	118,331
Other	39,918	35,651
Total other assets	$ 341,757	$ 348,935

OTHER ASSETS - Narrative (Detai

OTHER ASSETS - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Servicing Asset at Amortized Cost [Line Items]
Contractually Specified Servicing Fee Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Non-interest income	Non-interest income
Capitalized servicing rights	$ 16.6	$ 16.7
Continuing Operations
Servicing Asset at Amortized Cost [Line Items]
Mortgage loans sold and serviced for others	1,400	1,500	$ 1,600
Servicing fees	$ 6.7	$ 5.5	$ 8

OTHER ASSETS - Schedule of Mort

OTHER ASSETS - Schedule of Mortgage Servicing Rights Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Mortgage servicing rights activity
Balance at beginning of year	$ 13,047	$ 16,022	$ 16,348
Additions	2,892	3,119	4,568
Amortization	(4,330)	(4,590)	(4,921)
Payoffs	(952)	(958)	0
Allowance adjustment	1,438	(546)	27
Balance at end of year	12,095	13,047	$ 16,022
Servicing rights accounted for at fair value	$ 1,500	$ 1,800

DEPOSITS - Schedule of Time Dep

DEPOSITS - Schedule of Time Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Maturity date:
Within 1 year	$ 2,364,280	$ 912,756
Over 1 year to 2 years	270,630	606,856
Over 2 years to 3 years	26,039	68,984
Over 3 years to 4 years	9,020	28,441
Over 4 years to 5 years	9,864	15,835
Over 5 years	6,417	835
Account balances:
Less than $100,000	724,911	549,265
$100,000 through $250,000	1,276,175	642,600
$250,000 or more	685,164	441,842
Total	$ 2,686,250	$ 1,633,707

DEPOSITS - Narrative (Details)

DEPOSITS - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Related Party Transaction [Line Items]
Brokered deposits	$ 524,400	$ 120,900
Reciprocal deposits	110,200	71,100
Time deposits	2,686,250	1,633,707
Affiliated Entity
Related Party Transaction [Line Items]
Time deposits	$ 25,000	$ 22,300

BORROWED FUNDS - Schedule of Bo

BORROWED FUNDS - Schedule of Borrowed Funds (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Borrowings and junior subordinated debentures
Principal, Short-term borrowings	$ 260,000	$ 0
Principal, Long-term borrowings	246,586	125,509
Total borrowings	$ 506,586	$ 125,509
Weighted average rate on short-term borrowings (as percent)	5.54%	0%
Weighted average rate on long-term borrowings (as percent)	5.33%	5.52%
Weighted Average Rate	5.44%	5.52%
Advances from the FHLBB
Borrowings and junior subordinated debentures
Principal, Short-term borrowings	$ 260,000	$ 0
Principal, Long-term borrowings	$ 125,223	$ 4,445
Weighted average rate on short-term borrowings (as percent)	5.54%	0%
Weighted average rate on long-term borrowings (as percent)	4.80%	0.71%
Subordinated notes
Borrowings and junior subordinated debentures
Principal, Long-term borrowings	$ 98,335	$ 98,089
Weighted average rate on long-term borrowings (as percent)	5.50%	5.50%
Junior subordinated borrowing - Trust I
Borrowings and junior subordinated debentures
Principal, Long-term borrowings	$ 15,464	$ 15,464
Weighted average rate on long-term borrowings (as percent)	7.49%	6.54%
Junior subordinated borrowing - Trust II
Borrowings and junior subordinated debentures
Principal, Long-term borrowings	$ 7,564	$ 7,511
Weighted average rate on long-term borrowings (as percent)	7.35%	6.47%

BORROWED FUNDS - Narrative (Det

BORROWED FUNDS - Narrative (Details) - USD ($)	1 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
Borrowings and junior subordinated debentures
Short-term debt		$ 260,000,000		$ 0
Long-term borrowings		246,586,000		125,509,000
Variable-rate FHLB advances		0		0
Federal Reserve Bank Advances
Borrowings and junior subordinated debentures
Line of credit facility, remaining borrowing capacity		1,500,000,000		600,000,000
Advances from the FHLBB
Borrowings and junior subordinated debentures
Line of credit		3,000,000
Long-term line of credit		0		0
Line of credit facility, remaining borrowing capacity		2,500,000,000		1,500,000,000
Short-term debt		260,000,000		0
Long-term borrowings		125,223,000		4,445,000
Federal Reserve Bank Advances
Borrowings and junior subordinated debentures
Short-term debt		0		0
Federal Home Loan Bank Certificates And Obligations F H L B Callable Advances
Borrowings and junior subordinated debentures
Long-term borrowings		0		0
Federal Home Loan Bank Certificates And Obligations F H L B Amortizing Advances
Borrowings and junior subordinated debentures
Long-term borrowings		4,200,000		4,400,000
Subordinated notes
Borrowings and junior subordinated debentures
Long-term borrowings		98,335,000		$ 98,089,000
Subordinated notes | Subordinated Debt
Borrowings and junior subordinated debentures
Maturity period	10 years
Principal amount of debt issued			$ 100,000,000
Fixed interest rate			5.50%
Maturity period with fixed interest rate	5 years
Non callable period	5 years
Interest rate margin	2.49%
Subordinated notes | Debt Instrument Variable Rate Three Month SOFR | Subordinated Debt
Borrowings and junior subordinated debentures
Unamortized debt issuance expense		$ 1,700,000
Junior subordinated borrowing | Trust I
Borrowings and junior subordinated debentures
Common stock of trust		100%
Common stock of trust included in other asset		$ 500,000
Sole asset of trust in form of debt		$ 15,500,000
Variable interest rate		7.49%		6.54%
Period up to which interest payments can be deferred		5 years
Junior subordinated borrowing | Trust II
Borrowings and junior subordinated debentures
Common stock of trust		100%
Common stock of trust included in other asset		$ 200,000
Sole asset of trust in form of debt		$ 8,200,000
Variable interest rate		7.35%		6.47%
Period up to which interest payments can be deferred		5 years
Junior subordinated borrowing | LIBOR | Trust I
Borrowings and junior subordinated debentures
Interest rate margin		1.85%
Junior subordinated borrowing | LIBOR | Trust II
Borrowings and junior subordinated debentures
Interest rate margin		1.70%

BORROWED FUNDS - Schedule of Ma

BORROWED FUNDS - Schedule of Maturities of FHLBB Advances (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Amount
Total FHLBB advances	$ 385,223
Weighted Average Rate
Weighted Average Rate
Total FHLBB advances	5.30%
Fixed Rate Advances
Amount
2024	$ 290,010
2025	90,000
2026	521
2027	158
2028 and beyond	$ 4,534
Fixed Rate Advances | Weighted Average Rate
Weighted Average Rate
2023	5.48%
2024	5.01%
2025	2.20%
2026	2%
2027 and beyond	0.34%

OTHER LIABILITIES (Details)

OTHER LIABILITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Other Liabilities Disclosure [Abstract]
Derivative liabilities	$ 75,957	$ 97,030
Collateral on interest rate swaps	25,520	0
Finance lease liabilities	8,681	9,306
Employee benefits liability	43,042	45,175
Operating lease liabilities	53,026	53,736
Accrued interest payable	13,766	1,610
Customer transaction clearing accounts	12,366	5,758
Allowance for credit losses on unfunded commitments	9,256	8,588
Other	37,016	34,821
Total other liabilities	$ 278,630	$ 256,024

EMPLOYEE BENEFIT PLANS - Schedu

EMPLOYEE BENEFIT PLANS - Schedule of changes in the Projected Benefit Obligation and Plan Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension Plans
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	$ 3,729	$ 5,328
Service Cost	59	68	$ 59
Interest cost	186	141	140
Actuarial loss	(20)	(1,508)
Benefits paid	(250)	(263)
Settlements	(62)	(37)
Projected benefit obligation at end of year	3,642	3,729	5,328
Accumulated benefit obligation	3,642	3,729
Change in fair value of plan assets:
Fair value of plan assets at plan beginning of year	4,683	5,962
Actual return on plan assets	628	(979)
Contributions by employer	0	0
Benefits paid	(250)	(263)
Settlements	(62)	(37)
Fair value of plan assets at end of year	4,999	4,683	5,962
(Overfunded) status	(1,357)	(954)
Postretirement Benefits
Change in projected benefit obligation:
Projected benefit obligation at beginning of year	3,215	4,521
Service Cost	7	12	13
Interest cost	166	122	113
Participant contributions	0	0
Actuarial loss	58	(1,396)
Benefits paid	(140)	(44)
Projected benefit obligation at end of year	3,306	3,215	4,521
Change in fair value of plan assets:
Fair value of plan assets at plan beginning of year	0	0
Contributions by employer	140	44
Contributions by participant	0	0
Benefits paid	(140)	(44)
Fair value of plan assets at end of year	$ 0	$ 0	$ 0

EMPLOYEE BENEFIT PLANS - Sche_2

EMPLOYEE BENEFIT PLANS - Schedule of Amounts Recognized in Statement of Financial Position (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Jul. 01, 2023	Dec. 31, 2022
Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Other liabilities		$ 5,400
Pension Plans | Other assets
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Other assets	$ 1,357		$ 954
Pension Plans | Other liabilities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Other liabilities	0		0
Postretirement Benefits | Other liabilities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Other liabilities	$ 3,306		$ 3,215

EMPLOYEE BENEFIT PLANS - Sche_3

EMPLOYEE BENEFIT PLANS - Schedule of Net Periodic Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	$ 59	$ 68	$ 59
Interest Cost	186	141	140
Expected return on plan assets	(295)	(376)	(410)
Amortization of unrecognized actuarial loss	6	11	103
Net periodic pension (credit)	(44)	(156)	(108)
Postretirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	7	12	13
Interest Cost	166	122	113
Amortization of net prior service credit	83	83	83
Amortization of unrecognized actuarial loss	(64)	30	55
Net periodic pension (credit)	$ 192	$ 247	$ 264

EMPLOYEE BENEFIT PLANS - Sche_4

EMPLOYEE BENEFIT PLANS - Schedule of Changes in Plan Assets and Benefit Obligations Recognized in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amortization of actuarial (loss)	$ (6)	$ (11)	$ (103)
Actuarial (gain)	(353)	(154)	(495)
Settlement charge	0	0	(58)
Total recognized in accumulated other comprehensive income	(359)	(165)	(656)
Total recognized in net periodic pension cost recognized and other comprehensive income	(403)	(321)	(764)
Postretirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Amortization of prior service credit	(83)	(83)	(83)
Actuarial (gain)	(1,148)	(1,426)	(253)
Total recognized in accumulated other comprehensive income	(1,231)	(1,509)	(336)
Accrued post-retirement liability recognized	$ 3,306	$ 3,215	$ 4,521

EMPLOYEE BENEFIT PLANS - Narrat

EMPLOYEE BENEFIT PLANS - Narrative (Details) - USD ($)		12 Months Ended
	Aug. 01, 2014	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jul. 01, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expense under the plan		$ 3,100,000	$ 2,900,000	$ 3,200,000
Split-dollar agreement, accrued liability		$ 7,000,000	7,900,000
Marketable equity securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Target plan asset allocation		65%
Fixed income
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Target plan asset allocation		34%
Cash equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Target plan asset allocation		1%
Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net actuarial loss		$ 100,000	500,000	700,000
Expected cash contributions by employer		0
Defined benefit plan, expected amortization of gain (loss), next fiscal year		0
Expense under the plan		136,000
Defined benefit plan, fair value of plan assets		$ 4,999,000	$ 4,683,000	$ 5,962,000	$ 4,100,000
Other liabilities					$ 5,400,000
Funded status of plan (greater than)					80%
Discount rate		5.21%	2.73%	2.35%
Pension Plans | Fixed income
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets			$ 1,167,000
Postretirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net actuarial loss		$ (690,000)	(812,000)	$ 615,000
Defined benefit plan, fair value of plan assets		0	$ 0	0
Prior service cost of long-term care plan participants	$ 558,000
Amount expected to be amortized from other comprehensive income into net periodic pension cost over the next fiscal year		$ 60,000
Discount rate		4.98%	5.12%
Supplemental Employee Retirement Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit under the plan		$ 1,000,000
Expense under the plan			$ 2,000,000	$ 2,000,000
Eligible age for retirement plan		62 years
Accrued expenses		$ 16,700,000	$ 19,400,000

EMPLOYEE BENEFIT PLANS - Sche_5

EMPLOYEE BENEFIT PLANS - Schedule of Principal Actuarial Assumptions (Details) - Pension Plans	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected benefit obligation, discount rate	4.99%	5.21%	2.73%
Net periodic pension cost, discount rate	5.21%	2.73%	2.35%
Net periodic pension cost, long term rate of return on plan assets	6.50%	6.50%	7%

EMPLOYEE BENEFIT PLANS - Sche_6

EMPLOYEE BENEFIT PLANS - Schedule of Fair Values of the Plan's Assets by Asset Category and Level Within the Fair Value Hierarchy (Details) - Pension Plans - USD ($) $ in Thousands	Dec. 31, 2023	Jul. 01, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	$ 4,999	$ 4,100	$ 4,683	$ 5,962
Equity Mutual Funds, Large-Cap
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	1,357		1,441
Equity Mutual Funds, Mid-Cap
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	364		383
Equity Mutual Funds, Small-Cap
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	386		318
Fixed Income Mutual Funds, International Duration.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	828		814
Fixed Income - US Core
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets			1,167
Intermediate Duration
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	1,674		396
Cash Equivalents - money market
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	54		164
Equity Common/Collective Trusts, Large-Cap
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	336
Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	4,663		72
Level 1 | Equity Mutual Funds, Large-Cap
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	1,357		0
Level 1 | Equity Mutual Funds, Mid-Cap
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	364		0
Level 1 | Equity Mutual Funds, Small-Cap
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	386		0
Level 1 | Fixed Income Mutual Funds, International Duration.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	828		0
Level 1 | Fixed Income - US Core
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets			0
Level 1 | Intermediate Duration
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	1,674		0
Level 1 | Cash Equivalents - money market
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	54		72
Level 1 | Equity Common/Collective Trusts, Large-Cap
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	0
Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	336		4,611
Level 2 | Equity Mutual Funds, Large-Cap
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	0		1,441
Level 2 | Equity Mutual Funds, Mid-Cap
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	0		383
Level 2 | Equity Mutual Funds, Small-Cap
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	0		318
Level 2 | Fixed Income Mutual Funds, International Duration.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	0		814
Level 2 | Fixed Income - US Core
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets			1,167
Level 2 | Intermediate Duration
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	0		396
Level 2 | Cash Equivalents - money market
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	0		$ 92
Level 2 | Equity Common/Collective Trusts, Large-Cap
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan, fair value of plan assets	$ 336

EMPLOYEE BENEFIT PLANS - Sche_7

EMPLOYEE BENEFIT PLANS - Schedule of Estimated Benefit Payments (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2024	$ 277
2025	271
2026	264
2027	258
2028 - 2033	1,551
Postretirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2024	115
2025	112
2026	108
2027	111
2028 - 2033	$ 1,140

EMPLOYEE BENEFIT PLANS - Sche_8

EMPLOYEE BENEFIT PLANS - Schedule of Amounts in Accumulated Other Comprehensive Income That Have Not Yet Been Recognized as Components of Net Periodic Benefit Cost (Details) - Postretirement Benefits - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net prior service cost	$ 1,075	$ 1,159	$ 1,242
Net actuarial (gain)/loss	(690)	(812)	615
Total recognized in accumulated other comprehensive income	$ 385	$ 347	$ 1,857

INCOME TAXES - Schedule of Comp

INCOME TAXES - Schedule of Components of Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current:
Federal tax expense									$ 5,596	$ 17,915	$ 17,340
State tax expense									7,497	6,831	7,580
Total current tax expense									13,093	24,746	24,920
Deferred:
Federal tax (benefit)/expense									(2,658)	(2,274)	5,125
State tax (benefit)/expense									(1,711)	(1,187)	112
Total deferred tax (benefit)/expense									(4,369)	(3,461)	5,237
Change in valuation allowance									0	0	200
Income tax expense	$ (4,509)	$ 3,741	$ 3,944	$ 5,548	$ 5,227	$ 4,941	$ 6,119	$ 4,998	$ 8,724	$ 21,285	30,357
Net benefit, net operating loss, CARES Act											$ 500

INCOME TAXES - Schedule of Reco

INCOME TAXES - Schedule of Reconciliation of the Statutory Federal Income Tax Rate to Effective Tax Rate (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Amount
Statutory tax rate									$ 16,448	$ 23,902	$ 31,294
State taxes, net of federal tax benefit									4,570	4,459	6,077
Tax exempt income - investments, net									(3,611)	(3,515)	(3,475)
Bank-owned life insurance									(1,568)	(1,258)	(1,348)
Tax credits, net of basis reduction									(7,804)	(2,129)	(2,881)
Change in valuation allowance									0	0	200
Tax rate benefit on net operating loss carryback									0	0	(493)
Other, net									689	(174)	983
Income tax expense	$ (4,509)	$ 3,741	$ 3,944	$ 5,548	$ 5,227	$ 4,941	$ 6,119	$ 4,998	$ 8,724	$ 21,285	$ 30,357
Rate
Statutory tax rate									21%	21%	21%
State taxes, net of federal tax benefit									5.80%	3.90%	4.10%
Tax exempt income - investments, net									(4.60%)	(3.10%)	(2.30%)
Bank-owned life insurance									(2.00%)	(1.10%)	(0.90%)
Tax credits, net of basis reduction									(10.00%)	(1.90%)	(1.90%)
Change in valuation allowance									0%	0%	0.10%
Tax rate benefit on net operating loss carryback									0	0	(0.003)
Other, net									0.90%	(0.10%)	0.60%
Effective tax rate									11.10%	18.70%	20.40%

INCOME TAXES - Schedule of Co_2

INCOME TAXES - Schedule of Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Allowance for credit losses	$ 31,181	$ 28,312
Unrealized capital loss on tax credit investments	2,688	1,603
Net unrealized loss on securities available for sale, swaps, and pension in OCI	50,704	63,335
Employee benefit plans	12,102	11,659
Purchase accounting adjustments	4,587	4,342
Net operating loss carryforwards	202	503
Deferred loan fees	5,654	4,049
Lease liability	13,583	14,148
Premises and equipment	1,188	2,630
Nonaccrual interest	890	1,069
Intangible amortization	1,020	659
Other	2,337	1,778
Deferred tax assets, net before valuation allowances	126,136	134,087
Valuation allowance	(400)	(400)
Deferred tax assets, net of valuation allowances	125,736	133,687
Deferred tax liabilities:
Loan servicing rights	(1,133)	(1,212)
Unamortized tax credit reserve	(1,661)	(1,687)
Right-of-use asset	(12,874)	(12,457)
Deferred tax liabilities	(15,668)	(15,356)
Deferred tax assets, net	$ 110,068	$ 118,331

INCOME TAXES - Narrative (Detai

INCOME TAXES - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Income Tax Contingency [Line Items]
Decrease in net deferred tax assets	$ 8,300
Change in unrealized losses in OCI	12,600
Net operating loss carryforwards	103
Deferred loan fees	99
Federal
Income Tax Contingency [Line Items]
Operating loss carryforwards	$ 491

INCOME TAXES - Schedule of Co_3

INCOME TAXES - Schedule of Components of the Valuation Allowance on Deferred Tax Asset (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
State valuation allowances	$ (400)	$ (400)

INCOME TAXES - Schedule of Chan

INCOME TAXES - Schedule of Changes in Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits at January 1	$ 1,042	$ 1,025	$ 516
Increase in gross amounts of tax positions related to prior years	782	17	509
Decrease in gross amounts of tax positions related to prior years	0	0	0
Decrease due to settlement with taxing authority	0	0	0
Decrease due to lapse in statute of limitations	0	0	0
Unrecognized tax benefits at December 31	$ 1,824	$ 1,042	$ 1,025

DERIVATIVE INSTRUMENTS AND HE_3

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Narrative (Details)	12 Months Ended
	Dec. 31, 2023 USD ($) instrument	Dec. 31, 2022 USD ($)
Derivative [Line Items]
Derivative, notional amount	$ 4,787,190,000	$ 4,524,514,000
Amortized cost of securities pledged as collateral to derivative counterparties	9,800,000	12,000,000
Fair value of securities as pledged collateral to derivative counterparties	9,600,000	12,000,000
Cash pledged as collateral to derivative counterparties	0	0
Non-hedging derivatives:
Derivative [Line Items]
Derivative, notional amount	11,104,000	4,114,000
Cash Flow Hedging
Derivative [Line Items]
Derivative, notional amount	$ 800,000,000	800,000,000
Economic Hedging | Tax advantaged economic development bonds
Derivative [Line Items]
Fixed rate of interest (percent)	5.09%
Maturity period	21 years
Economic Hedging | Hedging derivatives
Derivative [Line Items]
Derivative, notional amount	$ 3,976,086,000	3,720,400,000
Interest Rate Swap
Derivative [Line Items]
Cash pledged as collateral to derivative counterparties	0	0
Interest Rate Swap | Financial institutions counterparties
Derivative [Line Items]
Derivative asset, fair value, amount offset against collateral	39,800,000	51,200,000
Amount of collateral posted for the net liability positions	6,100,000	1,200,000
Interest Rate Swap | Commercial counterparties
Derivative [Line Items]
Cash pledged as collateral to derivative counterparties	0	0
Derivative asset, fair value, amount offset against collateral	6,000,000	1,000,000
Amount of collateral posted for the net liability positions	$ 69,800,000	96,100,000
Interest Rate Swap | Cash Flow Hedging
Derivative [Line Items]
Number of interest rate swap contracts (contract) | instrument	8
Interest Rate Swap | Cash Flow Hedging | Minimum
Derivative [Line Items]
Durations of derivative instruments	2 years
Interest Rate Swap | Cash Flow Hedging | Maximum
Derivative [Line Items]
Durations of derivative instruments	3 years
Interest Rate Swap | Cash Flow Hedging | Hedging derivatives
Derivative [Line Items]
Derivative, notional amount	$ 600,000,000
Interest Rate Swap | Economic Hedging | Tax advantaged economic development bonds
Derivative [Line Items]
Derivative, notional amount	6,200,000
Interest Rate Swap | Economic Hedging | Hedging derivatives
Derivative [Line Items]
Derivative, notional amount	3,600,000,000
Interest Rate Swap | Economic Hedging | Hedging derivatives | Tax advantaged economic development bonds
Derivative [Line Items]
Derivative, notional amount	$ 6,202,000	7,062,000
Interest rate collars | Cash Flow Hedging
Derivative [Line Items]
Number of interest rate swap contracts (contract) | instrument	2
Interest rate collars | Cash Flow Hedging | Minimum
Derivative [Line Items]
Durations of derivative instruments	3 years
Interest rate collars | Cash Flow Hedging | Maximum
Derivative [Line Items]
Durations of derivative instruments	4 years
Interest rate collars | Cash Flow Hedging | Hedging derivatives
Derivative [Line Items]
Derivative, notional amount	$ 200,000,000
Risk Participation Agreements | Economic Hedging | Hedging derivatives
Derivative [Line Items]
Derivative, notional amount	376,553,000	341,885,000
Forward Commitments | Economic Hedging | Hedging derivatives
Derivative [Line Items]
Derivative, notional amount	2,207,000	$ 927,000
Interest Rate Swap And Forward Starting INterest Rate Swap | Cash Flow Hedging
Derivative [Line Items]
Derivative, notional amount	600,000,000
First Interest Rate Collars | Cash Flow Hedging
Derivative [Line Items]
Derivative, notional amount	$ 100,000,000
Derivative, cap interest rate	5.75%
Derivative, floor interest rate	3%
Second Interest Rate Collars | Cash Flow Hedging
Derivative [Line Items]
Derivative, notional amount	$ 100,000,000
Derivative, cap interest rate	5.75%
Derivative, floor interest rate	3.25%

DERIVATIVE INSTRUMENTS AND HE_4

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Schedule of Interest Rate Swap Agreements and Non-hedging Derivative Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Offsetting Assets [Line Items]
Notional Amount	$ 4,787,190	$ 4,524,514
Estimated Fair Value Asset (Liability)	(30,289)	(43,167)
Fair value estimates, impact of settled to market contract	26,700	38,300
Non-hedging derivatives
Offsetting Assets [Line Items]
Notional Amount	11,104	4,114
Estimated Fair Value Asset (Liability)	34	17
Commitments to lend | Non-hedging derivatives
Offsetting Assets [Line Items]
Notional Amount	$ 11,104	$ 4,114
Weighted Average Maturity (in years)	2 months 12 days	2 months 12 days
Estimated Fair Value Asset (Liability)	$ 34	$ 17
Cash Flow Hedging
Offsetting Assets [Line Items]
Notional Amount	800,000	800,000
Estimated Fair Value Asset (Liability)	1,658	1,937
Cash Flow Hedging | Interest rate swap | Hedging derivatives
Offsetting Assets [Line Items]
Notional Amount	600,000
Cash Flow Hedging | Interest rate swap | Commercial Loan
Offsetting Assets [Line Items]
Notional Amount	$ 600,000	$ 400,000
Weighted Average Maturity (in years)	1 year 10 months 24 days	2 years 8 months 12 days
Weighted Average Rate - Received	3.64%	4.09%
Weighted Average Rate - Contract pay rate	5.35%	3.51%
Estimated Fair Value Asset (Liability)	$ 0	$ 0
Cash Flow Hedging | Forward-starting interest rate swaps | Commercial Loan
Offsetting Assets [Line Items]
Notional Amount		$ 200,000
Weighted Average Maturity (in years)		3 years 3 months 18 days
Weighted Average Rate - Received		0%
Weighted Average Rate - Contract pay rate		3.90%
Estimated Fair Value Asset (Liability)		$ 0
Cash Flow Hedging | Interest rate collars | Hedging derivatives
Offsetting Assets [Line Items]
Notional Amount	200,000
Cash Flow Hedging | Interest rate collars | Commercial Loan
Offsetting Assets [Line Items]
Notional Amount	$ 200,000	$ 200,000
Weighted Average Maturity (in years)	2 years 6 months	3 years 6 months
Estimated Fair Value Asset (Liability)	$ 1,658	$ 1,937
Economic Hedging | Hedging derivatives
Offsetting Assets [Line Items]
Notional Amount	3,976,086	3,720,400
Estimated Fair Value Asset (Liability)	(31,981)	(45,121)
Economic Hedging | Interest rate swap | Tax advantaged economic development bonds
Offsetting Assets [Line Items]
Notional Amount	6,200
Economic Hedging | Interest rate swap | Hedging derivatives
Offsetting Assets [Line Items]
Notional Amount	3,600,000
Economic Hedging | Interest rate swap | Hedging derivatives | Tax advantaged economic development bonds
Offsetting Assets [Line Items]
Notional Amount	$ 6,202	$ 7,062
Weighted Average Maturity (in years)	5 years 10 months 24 days	6 years 10 months 24 days
Weighted Average Rate - Received	5.82%	4.49%
Weighted Average Rate - Contract pay rate	5.09%	5.09%
Estimated Fair Value Asset (Liability)	$ (172)	$ (193)
Economic Hedging | Interest rate swap | Hedging derivatives | Commercial loan
Offsetting Assets [Line Items]
Notional Amount	$ 1,795,562	$ 1,685,263
Weighted Average Maturity (in years)	4 years 10 months 24 days	5 years 8 months 12 days
Weighted Average Rate - Received	4.36%	4.11%
Weighted Average Rate - Contract pay rate	6.27%	5.55%
Estimated Fair Value Asset (Liability)	$ (63,865)	$ (95,114)
Economic Hedging | Reverse interest rate swaps | Hedging derivatives | Commercial loan
Offsetting Assets [Line Items]
Notional Amount	$ 1,795,562	$ 1,685,263
Weighted Average Maturity (in years)	4 years 10 months 24 days	5 years 8 months 12 days
Weighted Average Rate - Received	6.27%	5.55%
Weighted Average Rate - Contract pay rate	4.36%	4.11%
Estimated Fair Value Asset (Liability)	$ 32,053	$ 50,267
Economic Hedging | Risk participation agreements | Hedging derivatives
Offsetting Assets [Line Items]
Notional Amount	$ 376,553	$ 341,885
Weighted Average Maturity (in years)	5 years 6 months	6 years 7 months 6 days
Estimated Fair Value Asset (Liability)	$ (18)	$ (89)
Economic Hedging | Forward sale commitments | Hedging derivatives
Offsetting Assets [Line Items]
Notional Amount	$ 2,207	$ 927
Weighted Average Maturity (in years)	2 months 12 days	2 months 12 days
Estimated Fair Value Asset (Liability)	$ 21	$ 8

DERIVATIVE INSTRUMENTS AND HE_5

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) (Details) - Interest Rate Swap - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Interest Expense
Derivative [Line Items]
Net interest expense recognized on hedged commercial loans	$ 9,026	$ (15)	$ 0
Commercial Loan
Derivative [Line Items]
Unrealized gain/(loss) recognized in accumulated other comprehensive loss	1,770	(6,667)	0
Less: Reclassification of unrealized (loss) from accumulated other comprehensive loss to interest income	(632)	0	0
Net tax benefit on items recognized in accumulated other comprehensive income	(630)	1,789	0
Other comprehensive gain/(loss) recorded in accumulated other comprehensive income/(loss), net of reclassification adjustments and tax effects	$ 1,772	$ (4,878)	$ 0

DERIVATIVE INSTRUMENTS AND HE_6

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Schedule of Amounts Included in the Consolidated Statements of Income Related to Economic Hedges and Non-hedging Derivatives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Hedging derivatives | Economic Hedging | Interest Rate Swap | Industrial Revenue Bond
Derivative [Line Items]
Unrealized gain/(loss) recognized in other non-interest income	$ 21	$ 941	$ 619
Hedging derivatives | Economic Hedging | Interest Rate Swap | Commercial loan
Derivative [Line Items]
Unrealized gain/(loss) recognized in other non-interest income	31,310	(171,272)	(86,099)
Hedging derivatives | Economic Hedging | Reverse Interest Rate Swaps | Commercial loan
Derivative [Line Items]
Unrealized gain/(loss) recognized in other non-interest income	(31,310)	171,272	86,099
Favorable/(unfavorable) change in credit valuation adjustment recognized in other non-interest income	0	1,809	1,431
Hedging derivatives | Economic Hedging | Risk Participation Agreements
Derivative [Line Items]
Unrealized gain/(loss) recognized in other non-interest income	(74)	(521)	(233)
Hedging derivatives | Economic Hedging | Forward Commitments | Noninterest Income
Derivative [Line Items]
Unrealized gain/(loss) recognized in other non-interest income	13	(126)	(186)
Non-hedging derivatives | Commitments to lend
Derivative [Line Items]
Realized gain in other non-interest income	536	462	2,854
Non-hedging derivatives | Commitments to lend | Noninterest Income
Derivative [Line Items]
Unrealized gain/(loss) recognized in other non-interest income	$ 17	$ (107)	$ (611)

DERIVATIVE INSTRUMENTS AND HE_7

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Schedule of Assets Subject to an Enforceable Master Netting Arrangement (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Offsetting Assets [Line Items]
Net Amounts of Assets Presented in the Statements of Condition	$ 45,668	$ 54,241
Interest Rate Swap
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	77,571	97,270
Gross Amounts Offset in the Statements of Condition	(31,812)	(45,046)
Net Amounts of Assets Presented in the Statements of Condition	45,759	52,224
Gross Amounts Not Offset in the Statements of Condition, Financial Instruments	0	0
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Received	0	0
Net Amount	45,759	52,224
Institutional counterparties | Interest Rate Swap
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	71,579	96,295
Gross Amounts Offset in the Statements of Condition	(31,812)	(45,046)
Net Amounts of Assets Presented in the Statements of Condition	39,767	51,249
Gross Amounts Not Offset in the Statements of Condition, Financial Instruments	0	0
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Received	0	0
Net Amount	39,767	51,249
Commercial counterparties | Interest Rate Swap
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	5,992	975
Gross Amounts Offset in the Statements of Condition	0	0
Net Amounts of Assets Presented in the Statements of Condition	5,992	975
Gross Amounts Not Offset in the Statements of Condition, Financial Instruments	0	0
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Received	0	0
Net Amount	$ 5,992	$ 975

DERIVATIVE INSTRUMENTS AND HE_8

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Schedule of Liabilities Subject to an Enforceable Master Netting Arrangement (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Offsetting Liabilities [Line Items]
Net Amounts of Liabilities Presented in the Statement of Condition	$ (75,957,000)	$ (97,030,000)
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Received	0	0
Interest Rate Swap
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	(81,073,000)	(103,866,000)
Gross Amounts Offset in the Statements of Condition	5,142,000	6,543,000
Net Amounts of Liabilities Presented in the Statement of Condition	(75,931,000)	(97,323,000)
Gross Amounts Not Offset in the Statements of Condition, Financial Instruments	9,633,000	11,973,000
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Received	0	0
Net Amount	(66,298,000)	(85,350,000)
Institutional counterparties | Interest Rate Swap
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	(11,277,000)	(1,271,000)
Gross Amounts Offset in the Statements of Condition	5,142,000	36,000
Net Amounts of Liabilities Presented in the Statement of Condition	(6,135,000)	(1,235,000)
Gross Amounts Not Offset in the Statements of Condition, Financial Instruments	9,633,000	11,973,000
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Received	0	0
Net Amount	3,498,000	10,738,000
Commercial counterparties | Interest Rate Swap
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	(69,796,000)	(102,595,000)
Gross Amounts Offset in the Statements of Condition	0	6,507,000
Net Amounts of Liabilities Presented in the Statement of Condition	(69,796,000)	(96,088,000)
Gross Amounts Not Offset in the Statements of Condition, Financial Instruments	0	0
Gross Amounts Not Offset in the Statements of Condition, Cash Collateral Received	0	0
Net Amount	$ (69,796,000)	$ (96,088,000)

LEASES - Narrative (Details)

LEASES - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Lessee, Lease, Description [Line Items]
Operating lease expense	$ 9.1	$ 9.7	$ 10.9
Minimum
Lessee, Lease, Description [Line Items]
Operating lease contract term	1 month
Maximum
Lessee, Lease, Description [Line Items]
Operating lease contract term	16 years

LEASES - Schedule of ROU Assets

LEASES - Schedule of ROU Assets and Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Lease Right-of-Use Assets
Operating lease right-of-use assets	$ 47,348	$ 46,411
Finance lease right-of-use assets	5,597	6,151
Total Lease Right-of-Use Assets	52,945	52,562
Lease Liabilities
Operating lease liabilities	53,026	53,736
Finance lease liabilities	8,681	9,306
Total Lease Liabilities	$ 61,707	$ 63,042
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets	Other assets
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Premises and equipment, net	Premises and equipment, net
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Finance Lease, Liability, Statement of Financial Position [Extensible List]	Other liabilities	Other liabilities

LEASES - Schedule of Supplement

LEASES - Schedule of Supplemental Information Related to Leases (Details)	Dec. 31, 2023	Dec. 31, 2022
Weighted-Average Remaining Lease Term (in years)
Operating leases	8 years 3 months 18 days	9 years 3 months 18 days
Finance leases	10 years 9 months 18 days	11 years 9 months 18 days
Weighted-Average Discount Rate
Operating leases	2.90%	2.56%
Finance leases	5%	5%

LEASES - Schedule of Suppleme_2

LEASES - Schedule of Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 9,009	$ 9,438	$ 10,897
Operating cash flows from finance leases	446	476	503
Financing cash flows from finance leases	593	555	528
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	8,512	5,730	2,976
Finance leases	$ 0	$ 0	$ 0

LEASES - Schedule of Maturity A

LEASES - Schedule of Maturity Analysis of Operating and Finance Lease Liability (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Operating Leases
2024	$ 9,519
2025	8,533
2026	7,471
2027	6,589
2028	5,567
Thereafter	21,399
Total undiscounted lease payments	59,078
Less amounts representing interest	(6,052)
Lease liability	53,026	$ 53,736
Finance Leases
2024	1,039
2025	1,039
2026	1,039
2027	1,039
2028	1,039
Thereafter	6,036
Total undiscounted lease payments	11,231
Less amounts representing interest	(2,550)
Lease liability	$ 8,681	$ 9,306

OTHER COMMITMENTS, CONTINGENC_3

OTHER COMMITMENTS, CONTINGENCIES, AND OFF-BALANCE SHEET ACTIVITIES - Schedule of Financial Instruments Outstanding Whose Contract Amounts Represent Credit Risk (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financial commitments whose contractual amount represents credit risk
Total	$ 2,237,512	$ 2,324,399
Commitments to originate new loans
Financial commitments whose contractual amount represents credit risk
Total	256,877	305,474
Unused funds on commercial and other lines of credit
Financial commitments whose contractual amount represents credit risk
Total	1,146,415	966,523
Unadvanced funds on home equity lines of credit
Financial commitments whose contractual amount represents credit risk
Total	347,543	336,924
Unadvanced funds on construction and real estate loans
Financial commitments whose contractual amount represents credit risk
Total	467,702	694,091
Standby letters of credit
Financial commitments whose contractual amount represents credit risk
Total	$ 18,975	$ 21,387

OTHER COMMITMENTS, CONTINGENC_4

OTHER COMMITMENTS, CONTINGENCIES, AND OFF-BALANCE SHEET ACTIVITIES - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Investment tax credit	$ 28.9

SHAREHOLDERS' EQUITY AND EARN_3

SHAREHOLDERS' EQUITY AND EARNINGS PER COMMON SHARE - Schedule of Actual and Required Capital Ratios (Details) $ in Thousands	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Total capital to risk-weighted assets
Total capital to risk-weighted assets, Actual Amount	$ 1,371,740	$ 1,336,029
Total capital to risk-weighted assets, Actual Ratio	0.1436	0.1460
Total capital to risk-weighted assets, Minimum Capital Requirement, Amount	$ 764,130	$ 732,070
Total capital to risk-weighted assets, Minimum Capital Requirement, Ratio	0.0800	0.0800
Common Equity Tier 1 Capital to risk weighted assets
Common Equity Tier 1 Capital to risk weighted assets,Actual Amount	$ 1,149,620	$ 1,130,522
Common Equity Tier 1 Capital to risk weighted assets, Actual Ratio	0.1204	0.1235
Common equity tier 1 capital to risk weighted assets Minimum Capital Requirement , Amount	$ 429,823	$ 411,789
Common equity tier 1 capital to risk weighted assets Minimum Capital Requirement , Ratio	0.0450	0.0450
Common equity tier 1 capital to risk weighted assets Minimum to be Well Capitalized Under Prompt Corrective Action Provisions, Ratio		0.0450
Tier 1 capital to risk-weighted assets
Tier 1 capital risk-weighted assets, Actual Amount	$ 1,171,957	$ 1,152,808
Tier 1 capital risk-weighted assets,Actual Ratio	0.1227	0.1260
Tier 1 capital risk-weighted assets,Minimum Capital Requirement, Amount	$ 573,098	$ 549,052
Tier 1 capital risk-weighted assets, Minimum Capital Requirement, Ratio	0.0600	0.0600
Tier 1 capital to average assets
Tier 1 capital to average assets, Actual Amount	$ 1,171,957	$ 1,152,808
Tier 1 capital to average assets,Actual Ratio	0.0965	0.1018
Tier 1 capital to average assets, Minimum Capital Requirement, Amount	$ 382,065	$ 366,035
Tier 1 capital to average assets, Minimum Capital Requirement, Ratio	0.0400	0.0400
Total risk-weighted assets	$ 9,551,627	$ 9,150,869
Subsidiaries
Total capital to risk-weighted assets
Total capital to risk-weighted assets, Actual Amount	$ 1,268,037	$ 1,239,722
Total capital to risk-weighted assets, Actual Ratio	0.1329	0.1356
Total capital to risk-weighted assets, Minimum Capital Requirement, Amount	$ 763,503	$ 731,259
Total capital to risk-weighted assets, Minimum Capital Requirement, Ratio	0.0800	0.0800
Total capital to risk-weighted assets,Minimum to be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 954,379	$ 914,074
Total capital to risk-weighted assets, Minimum to be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	0.1000	0.1000
Common Equity Tier 1 Capital to risk weighted assets
Common Equity Tier 1 Capital to risk weighted assets,Actual Amount	$ 1,167,282	$ 1,155,280
Common Equity Tier 1 Capital to risk weighted assets, Actual Ratio	0.1223	0.1264
Common equity tier 1 capital to risk weighted assets Minimum Capital Requirement , Amount	$ 429,470	$ 411,333
Common equity tier 1 capital to risk weighted assets Minimum to be Well Capitalized Under Prompt Corrective Action Provisions ,Amount	$ 620,346	$ 594,148
Common equity tier 1 capital to risk weighted assets Minimum to be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	0.0650	0.0650
Tier 1 capital to risk-weighted assets
Tier 1 capital risk-weighted assets, Actual Amount	$ 1,167,282	$ 1,155,280
Tier 1 capital risk-weighted assets,Actual Ratio	0.1223	0.1264
Tier 1 capital risk-weighted assets,Minimum Capital Requirement, Amount	$ 572,627	$ 548,444
Tier 1 capital risk-weighted assets, Minimum Capital Requirement, Ratio	0.0600	0.0600
Tier 1 capital risk-weighted assets,Minimum to be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 763,503	$ 731,259
Tier 1 capital risk-weighted assets, Minimum to be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	0.0800	0.0800
Tier 1 capital to average assets
Tier 1 capital to average assets, Actual Amount	$ 1,167,282	$ 1,155,280
Tier 1 capital to average assets,Actual Ratio	0.0961	0.1020
Tier 1 capital to average assets, Minimum Capital Requirement, Amount	$ 381,751	$ 365,629
Tier 1 capital to average assets, Minimum Capital Requirement, Ratio	0.0400	0.0400
Tier 1 capital to average assets, Minimum to be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 477,189	$ 457,037
Tier 1 capital to average assets, minimum to be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	0.0500	0.0500
Total risk-weighted assets	$ 9,543,786	$ 9,140,737

SHAREHOLDERS' EQUITY AND EARN_4

SHAREHOLDERS' EQUITY AND EARNINGS PER COMMON SHARE - Schedule of Components of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total shareholders’ equity	$ 1,012,221	$ 954,062	$ 1,182,435	$ 1,187,773
Accumulated other comprehensive (loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total shareholders’ equity	(143,016)	(181,052)	(3,243)	30,871
Net unrealized holding (loss) on AFS securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other accumulated comprehensive (loss), before tax:	(188,927)	(236,887)
Income taxes related to items of accumulated other comprehensive (loss):	49,401	61,329
Total shareholders’ equity	(139,525)	(175,557)	(1,398)	33,459
Net (loss) on effective cash flow hedging derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other accumulated comprehensive (loss), before tax:	(4,265)	(6,667)
Income taxes related to items of accumulated other comprehensive (loss):	1,159	1,789
Total shareholders’ equity	(3,106)	(4,878)	0	0
Net unrealized holding (loss) on pension plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other accumulated comprehensive (loss), before tax:	(528)	(844)
Income taxes related to items of accumulated other comprehensive (loss):	144	228
Total shareholders’ equity	$ (385)	$ (617)	$ (1,845)	$ (2,588)

SHAREHOLDERS' EQUITY AND EARN_5

SHAREHOLDERS' EQUITY AND EARNINGS PER COMMON SHARE - Schedule of Components of Other Comprehensive (Loss)/Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Gains (losses) arising during the period
Net of Tax	$ 19,325	$ (177,805)	$ (34,114)
Less: reclassification adjustment for gains realized in net income
Net of Tax	(18,711)	4	0
Other comprehensive income (loss)
Total other comprehensive income/(loss), before tax	50,678	(240,074)	(45,801)
Total income tax (expense)/benefit related to other comprehensive income/(loss)	(12,642)	62,265	11,687
Total other comprehensive (loss)/income	38,036	(177,809)	(34,114)
Net unrealized holding gain on AFS securities:
Gains (losses) arising during the period
Before Tax	22,903	(235,075)	(46,794)
Tax Effect	(5,122)	60,920	11,937
Net of Tax	17,781	(174,155)	(34,857)
Less: reclassification adjustment for gains realized in net income
Before Tax	(25,057)	6	0
Tax Effect	6,806	(2)	0
Net of Tax	(18,251)	4	0
Other comprehensive income (loss)
Total other comprehensive income/(loss), before tax	47,960	(235,081)	(46,794)
Total income tax (expense)/benefit related to other comprehensive income/(loss)	(11,928)	60,922	11,937
Total other comprehensive (loss)/income	36,032	(174,159)	(34,857)
Net gain on cash flow hedging derivatives:
Gains (losses) arising during the period
Before Tax	1,770	(6,667)
Tax Effect	(458)	1,789
Net of Tax	1,312	(4,878)	0
Less: reclassification adjustment for gains realized in net income
Before Tax	(632)	0
Tax Effect	172	0
Net of Tax	(460)	0	0
Other comprehensive income (loss)
Total other comprehensive income/(loss), before tax	2,402	(6,667)
Total income tax (expense)/benefit related to other comprehensive income/(loss)	(630)	1,789
Total other comprehensive (loss)/income	1,772	(4,878)	0
Net unrealized holding gain on pension plans
Gains (losses) arising during the period
Before Tax	316	1,674	993
Tax Effect	(84)	(446)	(250)
Net of Tax	232	1,228	743
Less: reclassification adjustment for gains realized in net income
Before Tax	0	0	0
Tax Effect	0	0	0
Net of Tax	0	0	0
Other comprehensive income (loss)
Total other comprehensive income/(loss), before tax	316	1,674	993
Total income tax (expense)/benefit related to other comprehensive income/(loss)	(84)	(446)	(250)
Total other comprehensive (loss)/income	$ 232	$ 1,228	$ 743

SHAREHOLDERS' EQUITY AND EARN_6

SHAREHOLDERS' EQUITY AND EARNINGS PER COMMON SHARE - Schedule of Gross Changes in Each Component of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 954,062	$ 1,182,435	$ 1,187,773
Other comprehensive income before reclassifications	19,325	(177,805)	(34,114)
Amounts reclassified from accumulated other comprehensive income	(18,711)	4	0
Total other comprehensive (loss)/income	38,036	(177,809)	(34,114)
Ending balance	1,012,221	954,062	1,182,435
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(181,052)	(3,243)	30,871
Total other comprehensive (loss)/income	38,036	(177,809)	(34,114)
Ending balance	(143,016)	(181,052)	(3,243)
Net unrealized holding (loss) on AFS securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(175,557)	(1,398)	33,459
Other comprehensive income before reclassifications	17,781	(174,155)	(34,857)
Amounts reclassified from accumulated other comprehensive income	(18,251)	4	0
Total other comprehensive (loss)/income	36,032	(174,159)	(34,857)
Ending balance	(139,525)	(175,557)	(1,398)
Net (loss) on effective cash flow hedging derivatives
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(4,878)	0	0
Other comprehensive income before reclassifications	1,312	(4,878)	0
Amounts reclassified from accumulated other comprehensive income	(460)	0	0
Total other comprehensive (loss)/income	1,772	(4,878)	0
Ending balance	(3,106)	(4,878)	0
Net unrealized holding (loss) on pension plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(617)	(1,845)	(2,588)
Other comprehensive income before reclassifications	232	1,228	743
Amounts reclassified from accumulated other comprehensive income	0	0	0
Total other comprehensive (loss)/income	232	1,228	743
Ending balance	$ (385)	$ (617)	$ (1,845)

SHAREHOLDERS' EQUITY AND EARN_7

SHAREHOLDERS' EQUITY AND EARNINGS PER COMMON SHARE - Schedule of Amounts Reclassified out of Each Component of Accumulated Other Comprehensive (Loss)/Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Non-interest income	$ (8,383)	$ 17,465	$ 17,094	$ 16,606	$ 15,654	$ 16,251	$ 16,351	$ 20,681	$ 42,782	$ 68,937	$ 143,248
Interest expense	(62,116)	(57,687)	(52,666)	(34,783)	(19,292)	(11,587)	(6,021)	(5,760)	(207,252)	(42,660)	(37,899)
Non-interest expense	88,421	90,334	92,759	97,533	102,092	92,084	81,358	69,063	369,047	344,597	291,166
Tax expense (benefit)	$ 4,509	$ (3,741)	$ (3,944)	$ (5,548)	$ (5,227)	$ (4,941)	$ (6,119)	$ (4,998)	(8,724)	(21,285)	(30,357)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income/(loss) available to common shareholders									(18,711)	4	0
Realized (losses)/gains on AFS securities: | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Non-interest income									(25,057)	6	0
Tax expense (benefit)									6,806	(2)	0
Income/(loss) available to common shareholders									(18,251)	4	0
Net (loss) on effective cash flow hedging derivatives | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense									(632)	0	0
Non-interest expense									0	0	0
Tax expense (benefit)									172	0	0
Income/(loss) available to common shareholders									(460)	0	0
Realized (losses) on pension plans: | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Non-interest expense									0	0	0
Tax expense (benefit)									0	0	0
Income/(loss) available to common shareholders									$ 0	$ 0	$ 0

SHAREHOLDERS' EQUITY AND EARN_8

SHAREHOLDERS' EQUITY AND EARNINGS PER COMMON SHARE - Schedule of Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings Per Share Basic and Diluted [Line Items]
Net income	$ (1,445)	$ 19,545	$ 23,861	$ 27,637	$ 30,505	$ 18,717	$ 23,115	$ 20,196	$ 69,598	$ 92,533	$ 118,664
Average number of common shares issued (in shares)									51,903	51,903	51,903
Less: average number of treasury shares (in shares)									7,820	5,577	1,951
Less: average number of unvested stock award shares (in shares)									795	762	712
Average number of basic common shares outstanding (in shares)	42,852	43,164	43,443	43,693	44,105	44,700	45,818	47,668	43,288	45,564	49,240
Average number of diluted common shares outstanding (in shares)	43,101	43,347	43,532	44,036	44,484	45,034	46,102	48,067	43,504	45,914	49,554
Basic earnings per share (in dollars per share)	$ (0.03)	$ 0.45	$ 0.55	$ 0.63	$ 0.69	$ 0.42	$ 0.50	$ 0.42	$ 1.61	$ 2.03	$ 2.41
Diluted earnings per share (in dollars per share)	$ (0.03)	$ 0.45	$ 0.55	$ 0.63	$ 0.69	$ 0.42	$ 0.50	$ 0.42	$ 1.60	$ 2.02	$ 2.39
Unvested stock awards
Earnings Per Share Basic and Diluted [Line Items]
Plus: dilutive effect of stock (in shares)									216	345	309
Stock options outstanding
Earnings Per Share Basic and Diluted [Line Items]
Plus: dilutive effect of stock (in shares)									0	5	5

SHAREHOLDERS' EQUITY AND EARN_9

SHAREHOLDERS' EQUITY AND EARNINGS PER COMMON SHARE - Narrative (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Stock Options Outstanding
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	49	64	88

STOCK-BASED COMPENSATION PLAN_2

STOCK-BASED COMPENSATION PLANS - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost	$ 7,500,000	$ 7,300,000	$ 4,200,000
Total recognized tax benefit	$ 2,000,000	$ 2,000,000	$ 1,000,000
Weighted average fair value of stock awards granted (in USD per share)	$ 26.18	$ 28.75	$ 20.22
Vesting period	5 years
Total fair value of awards vested	$ 5,600,000	$ 5,100,000	$ 4,300,000
Unrecognized stock-based compensation expense	$ 10,100,000
Expected weighted-average period for recognition of unrecognized compensation	2 years
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost	$ 1,000	13,000	14,000
Total recognized tax benefit	$ 200	3,000	4,000
Vesting period	5 years
Unrecognized stock-based compensation expense	$ 0	1,000	14,000
Contractual life	10 years
Weighted average remaining contractual term for options outstanding	2 years
Total intrinsic value		$ 62,000	$ 102,000
2022 Equity Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized under the plan (in shares)	1,200,000
Number of shares available for grant under the plan (in shares)	1,200,000
2022 Equity Compensation Plan | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares counted against the share limit for each stock granted	100%
2022 Equity Compensation Plan | Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares counted against the share limit for each stock granted	100%

STOCK-BASED COMPENSATION PLAN_3

STOCK-BASED COMPENSATION PLANS - Schedule of Activity in the Stock Award and Stock Option Plans (Details) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Non-vested Stock Awards Outstanding
Number of Shares
Balance at the beginning of the period (in shares)	704,000
Granted (in shares)	446,000
Stock awards vested (in shares)	(262,000)
Forfeited (in shares)	(103,000)
Expired (in shares)	0
Balance at the end of the period (in shares)	785,000	704,000
Weighted- Average Grant Date Fair Value
Balance at the beginning of the period (in USD per share)	$ 22.85
Granted (in USD per share)	26.18	$ 28.75	$ 20.22
Stock awards vested (in USD per share)	21.29
Forfeited (in USD per share)	25.67
Expired (in USD per share)	0
Balance at the end of the period (in USD per share)	$ 24.92	$ 22.85
Stock Options Outstanding
Number of Shares
Balance at the beginning of the period (in shares)	49,000
Granted (in shares)	0
Exercised (in shares)	0
Forfeited (in shares)	0
Expired (in shares)	0
Balance at the end of the period (in shares)	49,000	49,000
Weighted- Average Exercise Price
Balance at the beginning of the period (in USD per share)	$ 26.46
Granted (in USD per share)	0
Stock options exercised (in USD per share)	0
Forfeited (in USD per share)	0
Expired (in USD per share)	0
Balance at the end of the period (in USD per share)	$ 26.46	$ 26.46

FAIR VALUE MEASUREMENTS - Sched

FAIR VALUE MEASUREMENTS - Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security	$ 6,100	$ 6,700
Fair Value	1,022,285	1,423,200
Marketable equity securities	13,029	12,856
Capitalized servicing rights	16,600	16,700
U.S Treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	7,981	11,973
Municipal bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	63,853	63,335
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	39,115	40,510
Other bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	656	656
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security	6,142	6,708
Fair Value	1,022,285	1,423,200
Marketable equity securities	13,029	12,856
Loans held for investment	8,768,108	8,194,110
Loans held for sale	2,237	4,311
Derivative assets	45,668	54,241
Derivative liabilities	75,957	97,030
Recurring | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security	6,142	6,708
Marketable equity securities	13,029	12,856
Loans held for investment	374	605
Loans held for sale	2,237	942
Derivative assets	45,668	54,241
Capitalized servicing rights	1,526	1,846
Derivative liabilities	75,957	97,030
Recurring | Fair Value | U.S Treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	7,981	11,973
Recurring | Fair Value | Municipal bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	63,853	63,335
Recurring | Fair Value | Agency collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	347,874	531,945
Recurring | Fair Value | Agency residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	417,480	546,313
Recurring | Fair Value | Agency commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	145,326	228,468
Recurring | Fair Value | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	39,115	40,510
Recurring | Fair Value | Other bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	656	656
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security	0	0
Fair Value	7,981	11,973
Marketable equity securities	13,029	12,856
Loans held for investment	0	0
Loans held for sale	0	0
Derivative assets	0	0
Derivative liabilities	0	0
Level 1 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security	0	0
Marketable equity securities	13,029	12,856
Loans held for investment	0	0
Loans held for sale	0	0
Derivative assets	0	0
Capitalized servicing rights	0	0
Derivative liabilities	0	0
Level 1 | Recurring | U.S Treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	7,981	11,973
Level 1 | Recurring | Municipal bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 1 | Recurring | Agency collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 1 | Recurring | Agency residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 1 | Recurring | Agency commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 1 | Recurring | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 1 | Recurring | Other bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security	0	0
Fair Value	1,010,381	1,407,227
Marketable equity securities	0	0
Loans held for investment	0	0
Loans held for sale	2,237	942
Derivative assets	45,613	54,216
Derivative liabilities	75,957	97,030
Level 2 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security	0	0
Marketable equity securities	0	0
Loans held for investment	0	0
Loans held for sale	2,237	942
Derivative assets	45,613	54,216
Capitalized servicing rights	0	0
Derivative liabilities	75,957	97,030
Level 2 | Recurring | U.S Treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 2 | Recurring | Municipal bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	63,853	63,335
Level 2 | Recurring | Agency collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	347,874	531,945
Level 2 | Recurring | Agency residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	417,480	546,313
Level 2 | Recurring | Agency commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	145,326	228,468
Level 2 | Recurring | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	35,192	36,510
Level 2 | Recurring | Other bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	656	656
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security	6,142	6,708
Fair Value	3,923	4,000
Marketable equity securities	0	0
Loans held for investment	8,768,108	8,194,110
Loans held for sale	0	3,369
Derivative assets	55	25
Derivative liabilities	0	0
Level 3 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading security	6,142	6,708
Marketable equity securities	0	0
Loans held for investment	374	605
Loans held for sale	0	0
Derivative assets	55	25
Capitalized servicing rights	1,526	1,846
Derivative liabilities	0	0
Level 3 | Recurring | U.S Treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 3 | Recurring | Municipal bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 3 | Recurring | Agency collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 3 | Recurring | Agency residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 3 | Recurring | Agency commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Level 3 | Recurring | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	3,923	4,000
Level 3 | Recurring | Other bonds and obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 0

FAIR VALUE MEASUREMENTS - Narra

FAIR VALUE MEASUREMENTS - Narrative (Details)	12 Months Ended
	Dec. 31, 2023 USD ($) security	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) transfer	Jan. 01, 2020 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Transfers to Level 3	$ 0	$ 0	$ 4,000,000
Number of transfers from Level 2 to Level 3 | transfer			1
Fair value write down	33,136,000	71,428,000
Loans Held for Investment | Impact of ASC 326 adoption
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value write down				$ 11,200,000
Continuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains (losses) in fair value of loans held for sale included in earnings			$ 169,000
Payments for origination of mortgage loans held-for-sale	85,000,000	20,000,000	104,000,000
Proceeds from sale and collection of loans held-for-sale	84,000,000	25,000,000	$ 108,000,000
Continuing Operations | Loans Held For Sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gains (losses) in fair value of loans held for sale included in earnings	$ 17,000	$ (169,000)
Trading Security
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of securities in the portfolio (security) | security	1

FAIR VALUE MEASUREMENTS - Sch_2

FAIR VALUE MEASUREMENTS - Schedule of Loans Held for Investment (Details) - Level 2 - Recurring - Loans Held for Investment - Continuing Operations - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Loans Held for Sale
Loans held for investment	$ 374	$ 605
Aggregate Unpaid Principal	8,809	10,948
Aggregate Fair Value Less Aggregate Unpaid Principal	$ (8,435)	$ (10,343)

FAIR VALUE MEASUREMENTS - Sch_3

FAIR VALUE MEASUREMENTS - Schedule of Loans Held for Sale (Details) - Level 2 - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Loans Held for Sale
Aggregate Fair Value	$ 2,237	$ 942
Recurring
Loans Held for Sale
Aggregate Fair Value	2,237	942
Continuing Operations | Recurring | Loans Held For Sale
Loans Held for Sale
Aggregate Fair Value	2,237	942
Aggregate Unpaid Principal	2,205	927
Aggregate Fair Value Less Aggregate Unpaid Principal	$ 32	$ 15

FAIR VALUE MEASUREMENTS - Sch_4

FAIR VALUE MEASUREMENTS - Schedule of Changes in Level 3 Assets and Liabilities that were Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Commitments to lend
Changes in Level 3 assets that were measured at fair value on a recurring basis
Unrealized gains (losses) relating to instruments still held at the end of the period	$ 34	$ 17
Derivative Asset (Liability)
Beginning balance	17	124
Unrealized (loss) gain, net recognized in other non-interest income	305	200
Transfers to loans held for sale	(288)	(307)
Ending balance	34	17
Forward Commitments
Changes in Level 3 assets that were measured at fair value on a recurring basis
Unrealized gains (losses) relating to instruments still held at the end of the period	21	8
Derivative Asset (Liability)
Beginning balance	8	134
Unrealized (loss) gain, net recognized in other non-interest income	13	(126)
Ending balance	21	8
Trading Security
Changes in Level 3 assets that were measured at fair value on a recurring basis
Balance at the beginning of the period	6,708	8,354
Paydown of asset	(860)	(818)
Balance at the end of the period	6,142	6,708
Unrealized gains (losses) relating to instruments still held at the end of the period	(60)	(354)
Derivative Asset (Liability)
Unrealized (loss) gain, net recognized in other non-interest income	294	(828)
Securities Available for Sale
Changes in Level 3 assets that were measured at fair value on a recurring basis
Balance at the beginning of the period	4,000	4,030
Unrealized (loss) in included in accumulated other comprehensive loss	(77)	(30)
Balance at the end of the period	3,923	4,000
Unrealized gains (losses) relating to instruments still held at the end of the period	(77)	0
Loans Held for Investment
Changes in Level 3 assets that were measured at fair value on a recurring basis
Balance at the beginning of the period	605	1,200
Paydown of asset	(103)	(909)
Balance at the end of the period	374	605
Unrealized gains (losses) relating to instruments still held at the end of the period	0	0
Derivative Asset (Liability)
Unrealized (loss) gain, net recognized in other non-interest income	(128)	314
Capitalized servicing rights
Changes in Level 3 assets that were measured at fair value on a recurring basis
Balance at the beginning of the period	1,846	1,966
Balance at the end of the period	1,526	1,846
Unrealized gains (losses) relating to instruments still held at the end of the period	0	0
Derivative Asset (Liability)
Unrealized (loss) gain, net recognized in other non-interest income	$ (320)	$ (120)

FAIR VALUE MEASUREMENTS - Sch_5

FAIR VALUE MEASUREMENTS - Schedule of Quantitative Information about the Significant Unobservable Inputs within Level 3 (Details) $ in Thousands	Dec. 31, 2023 USD ($) uSDPerLoan	Dec. 31, 2022 USD ($) uSDPerLoan
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Trading security	$ 6,142	$ 6,708
Securities available for sale, at fair value	1,022,285	1,423,200
Commitments	45,668	54,241
Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities available for sale, at fair value	3,923	4,000
Level 3 | Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Trading security	6,142	6,708
Loans held for investment	374	605
Total	12,020	13,184
Level 3 | Recurring | Commitments to lend
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Commitments	34	17
Level 3 | Recurring | Forward Commitments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Commitments	21	8
Level 3 | Recurring | Capitalized Servicing Rights
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Capitalized Servicing Rights	1,526	1,846
Level 3 | Recurring | Securities Available for Sale
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities available for sale, at fair value	$ 3,923	$ 4,000
Level 3 | Recurring | Discount Rate | Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Trading Security, significant unobservable input value	0.0419	0.0592
Loans held for investment, Significant Unobservable Input Value	0.2500	0.2500
Level 3 | Recurring | Discount Rate | Discounted Cash Flow | Capitalized Servicing Rights
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Capitalized Servicing Rights, Significant Unobservable Input Value	0.1108	0.0956
Level 3 | Recurring | Price | Indication from Market Maker | Securities Available for Sale
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities Available for Sale, Significant Unobservable Input Value	0.9807	1
Level 3 | Recurring | Collateral Value | Discounted Cash Flow | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for investment, Significant Unobservable Input Value	0	0
Level 3 | Recurring | Collateral Value | Discounted Cash Flow | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for investment, Significant Unobservable Input Value	18.3	20.4
Level 3 | Recurring | Closing Ratio | Historical Trend | Commitments to lend
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Commitments, Significant Unobservable Input Value	0.8429	0.8063
Level 3 | Recurring | Closing Ratio | Historical Trend | Forward Commitments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Commitments, Significant Unobservable Input Value	0.8429	0.8063
Level 3 | Recurring | Origination Costs, per loan | Pricing Model | Commitments to lend
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Commitments, Significant Unobservable Input Value | uSDPerLoan	3,000	2,000
Level 3 | Recurring | Origination Costs, per loan | Pricing Model | Forward Commitments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Commitments, Significant Unobservable Input Value | uSDPerLoan	3,000	2,000
Level 3 | Recurring | Constant prepayment rate (CPR) | Discounted Cash Flow | Capitalized Servicing Rights
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Capitalized Servicing Rights, Significant Unobservable Input Value	0.0763	0.1107

FAIR VALUE MEASUREMENTS - Sch_6

FAIR VALUE MEASUREMENTS - Schedule of Non-recurring Fair Value Measurements (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Capitalized servicing rights	$ 16,600	$ 16,700
Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale	0	3,369
Non-recurring | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Individually evaluated loans	4,395	14,571
Loans held for sale		3,369
Capitalized servicing rights	10,569	11,201
Total Assets	$ 14,964	$ 29,141

FAIR VALUE MEASUREMENTS - Sch_7

FAIR VALUE MEASUREMENTS - Schedule of Significant Unobservable Inputs for Non-recurring Assets (Details) $ in Thousands	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Capitalized servicing rights	$ 16,600	$ 16,700
Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale	0	3,369
Non-recurring | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Individually evaluated loans	4,395	14,571
Loans held for sale		3,369
Capitalized servicing rights	10,569	11,201
Total Assets	14,964	29,141
Non-recurring | Fair value of collateral | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Individually evaluated loans	$ 4,395	14,571
Loans held for sale		$ 3,369
Non-recurring | Appraised value | Fair value of collateral | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, Measurement input		3,369
Non-recurring | Minimum | Discounted Cash Flow- Loss Severity | Fair value of collateral | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Individually evaluated loans, Measurement inputs, range	(1)	(1)
Non-recurring | Minimum | Appraised value | Fair value of collateral | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Individually evaluated loans, Measurement inputs, range	0	0
Non-recurring | Maximum | Discounted Cash Flow- Loss Severity | Fair value of collateral | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Individually evaluated loans, Measurement inputs, range	(0.0008)	0.7474
Non-recurring | Maximum | Appraised value | Fair value of collateral | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Individually evaluated loans, Measurement inputs, range	3,389	2,160
Non-recurring | Weighted Average | Discounted Cash Flow- Loss Severity | Fair value of collateral | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Individually evaluated loans, Measurement inputs, range	(0.6700)	(0.4002)
Non-recurring | Weighted Average | Appraised value | Fair value of collateral | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Individually evaluated loans, Measurement inputs, range	2,774	643
Non-recurring | Capitalized servicing rights | Discounted cash flow | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Capitalized servicing rights	$ 10,569	$ 11,201
Non-recurring | Capitalized servicing rights | Minimum | Constant prepayment rate (CPR) | Discounted cash flow | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Capitalized servicing rights, Measurement input	0.0543	0.0581
Non-recurring | Capitalized servicing rights | Minimum | Discount rate | Discounted cash flow | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Capitalized servicing rights, Measurement input	0.1009	0.0959
Non-recurring | Capitalized servicing rights | Maximum | Constant prepayment rate (CPR) | Discounted cash flow | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Capitalized servicing rights, Measurement input	0.1715	0.1318
Non-recurring | Capitalized servicing rights | Maximum | Discount rate | Discounted cash flow | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Capitalized servicing rights, Measurement input	0.1659	0.2270
Non-recurring | Capitalized servicing rights | Weighted Average | Constant prepayment rate (CPR) | Discounted cash flow | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Capitalized servicing rights, Measurement input	0.1231	0.1094
Non-recurring | Capitalized servicing rights | Weighted Average | Discount rate | Discounted cash flow | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Capitalized servicing rights, Measurement input	0.1382	0.1683

FAIR VALUE MEASUREMENTS - Sch_8

FAIR VALUE MEASUREMENTS - Schedule of Estimated Non-recurring Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financial Assets
Trading security	$ 6,100	$ 6,700
Marketable equity securities	13,029	12,856
Securities available for sale, at fair value	1,022,285	1,423,200
Securities held to maturity	476,228	507,464
FHLB stock and restricted equity securities	22,689	7,219
Accrued interest receivable	53,096	46,868
Financial Liabilities
Accrued interest payable	13,766	1,610
Carrying Amount
Financial Assets
Cash and cash equivalents	1,203,244	685,355
Trading security	6,142	6,708
Marketable equity securities	13,029	12,856
Securities available for sale, at fair value	1,022,285	1,423,200
Securities held to maturity	543,351	583,453
FHLB stock and restricted equity securities	22,689	7,219
Net loans	8,934,329	8,239,039
Loans held for sale	2,237	4,311
Accrued interest receivable	53,096	46,868
Derivative assets	45,668	54,241
Financial Liabilities
Total deposits	10,633,384	10,327,269
Short-term debt	260,000	0
Long-term FHLB advances	125,223	4,445
Subordinated notes	121,363	121,064
Accrued interest payable	13,766	1,610
Derivative liabilities	75,957	97,030
Fair Value
Financial Assets
Cash and cash equivalents	1,203,244	685,355
Trading security	6,142	6,708
Marketable equity securities	13,029	12,856
Securities available for sale, at fair value	1,022,285	1,423,200
Securities held to maturity	476,228	507,464
Net loans	8,768,108	8,194,110
Loans held for sale	2,237	4,311
Accrued interest receivable	53,096	46,868
Derivative assets	45,668	54,241
Financial Liabilities
Total deposits	10,615,655	10,283,543
Short-term debt	260,035	0
Long-term FHLB advances	123,747	2,782
Subordinated notes	98,138	110,853
Accrued interest payable	13,766	1,610
Derivative liabilities	75,957	97,030
Level 1
Financial Assets
Cash and cash equivalents	1,203,244	685,355
Trading security	0	0
Marketable equity securities	13,029	12,856
Securities available for sale, at fair value	7,981	11,973
Securities held to maturity	0	0
Net loans	0	0
Loans held for sale	0	0
Accrued interest receivable	0	0
Derivative assets	0	0
Financial Liabilities
Total deposits	0	0
Short-term debt	0	0
Long-term FHLB advances	0	0
Subordinated notes	0	0
Accrued interest payable	0	0
Derivative liabilities	0	0
Level 2
Financial Assets
Cash and cash equivalents	0	0
Trading security	0	0
Marketable equity securities	0	0
Securities available for sale, at fair value	1,010,381	1,407,227
Securities held to maturity	474,742	505,508
Net loans	0	0
Loans held for sale	2,237	942
Accrued interest receivable	53,096	46,868
Derivative assets	45,613	54,216
Financial Liabilities
Total deposits	10,615,655	10,283,543
Short-term debt	260,035	0
Long-term FHLB advances	123,747	2,782
Subordinated notes	98,138	110,853
Accrued interest payable	13,766	1,610
Derivative liabilities	75,957	97,030
Level 3
Financial Assets
Cash and cash equivalents	0	0
Trading security	6,142	6,708
Marketable equity securities	0	0
Securities available for sale, at fair value	3,923	4,000
Securities held to maturity	1,486	1,956
Net loans	8,768,108	8,194,110
Loans held for sale	0	3,369
Accrued interest receivable	0	0
Derivative assets	55	25
Financial Liabilities
Total deposits	0	0
Short-term debt	0	0
Long-term FHLB advances	0	0
Subordinated notes	0	0
Accrued interest payable	0	0
Derivative liabilities	$ 0	$ 0

CONDENSED FINANCIAL STATEMENT_3

CONDENSED FINANCIAL STATEMENTS OF PARENT COMPANY - Schedule of CONDENSED BALANCE SHEETS (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Assets
Cash due from Berkshire Bank	$ 148,148	$ 145,342
Other assets	341,757	348,935
Total assets	12,430,821	11,662,864
Liabilities and Shareholders’ Equity
Subordinated notes	121,363	121,064
Shareholders’ equity	1,012,221	954,062	$ 1,182,435	$ 1,187,773
Total liabilities and shareholders’ equity	12,430,821	11,662,864
Reportable legal entity | Berkshire Hills Bancorp
Assets
Cash due from Berkshire Bank	98,452	90,022
Investment in subsidiaries	1,038,039	986,805
Other assets	399	1,445
Total assets	1,136,890	1,078,272
Liabilities and Shareholders’ Equity
Subordinated notes	121,363	121,064
Accrued expenses	3,306	3,146
Shareholders’ equity	1,012,221	954,062
Total liabilities and shareholders’ equity	$ 1,136,890	$ 1,078,272

CONDENSED FINANCIAL STATEMENT_4

CONDENSED FINANCIAL STATEMENTS OF PARENT COMPANY - Schedule of CONDENSED STATEMENTS OF OPERATIONS (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income:
Total net revenue	$ 80,038	$ 107,799	$ 109,853	$ 114,139	$ 117,746	$ 108,335	$ 97,709	$ 89,744	$ 411,829	$ 413,534	$ 434,414
Interest expense	62,116	57,687	52,666	34,783	19,292	11,587	6,021	5,760	207,252	42,660	37,899
Income tax (benefit)	(4,509)	3,741	3,944	5,548	5,227	4,941	6,119	4,998	8,724	21,285	30,357
Net income/(loss)	$ (1,445)	$ 19,545	$ 23,861	$ 27,637	$ 30,505	$ 18,717	$ 23,115	$ 20,196	69,598	92,533	118,664
Comprehensive income/(loss)									107,634	(85,276)	84,550
Reportable legal entity | Berkshire Hills Bancorp
Income:
Dividends from subsidiaries									62,000	108,000	118,000
Other									50	23	31
Total net revenue									62,050	108,023	118,031
Interest expense									5,697	7,044	5,393
Non-interest expenses									3,702	2,754	2,719
Total expense									9,399	9,798	8,112
Income before income taxes and equity in undistributed income of subsidiaries									52,651	98,225	109,919
Income tax (benefit)									(2,500)	(2,586)	(2,136)
Income before equity in undistributed income of subsidiaries									55,151	100,811	112,055
Equity in undistributed results of operations of subsidiaries									14,447	(8,278)	6,609
Net income/(loss)									69,598	92,533	118,664
Comprehensive income/(loss)									$ 107,634	$ (85,276)	$ 84,550

CONDENSED FINANCIAL STATEMENT_5

CONDENSED FINANCIAL STATEMENTS OF PARENT COMPANY - Schedule of CONDENSED STATEMENTS OF CASH FLOWS (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net income	$ (1,445)	$ 19,545	$ 23,861	$ 27,637	$ 30,505	$ 18,717	$ 23,115	$ 20,196	$ 69,598	$ 92,533	$ 118,664
Adjustments to reconcile net income to net cash provided by operating activities:
Other, net									14,387	(12,076)	18,282
Net cash provided by operating activities									157,156	110,739	84,788
Cash flows from investing activities:
Net cash (used)/provided by investing activities									(284,461)	(1,260,886)	621,243
Cash flows from financing activities:
Proceeds from issuance of long term debt									0	98,032	0
Payment to repurchase common stock									(23,844)	(124,519)	(68,712)
Common and preferred stock cash dividends paid									(31,707)	(24,527)	(24,553)
Net cash provided/(used) by financing activities									645,194	207,695	(636,099)
Net change in cash and cash equivalents									517,889	(942,452)	69,932
Cash and cash equivalents at beginning of year				685,355				1,627,807	685,355	1,627,807	1,557,875
Cash and cash equivalents at end of year	1,203,244				685,355				1,203,244	685,355	1,627,807
Reportable legal entity | Berkshire Hills Bancorp
Cash flows from operating activities:
Net income									69,598	92,533	118,664
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed results of operations of subsidiaries									(14,447)	8,278	(6,609)
Other, net									8,688	5,998	5,816
Net cash provided by operating activities									63,839	106,809	117,871
Cash flows from investing activities:
Sale of securities									0	0	167
Net cash (used)/provided by investing activities									0	0	167
Cash flows from financing activities:
Proceeds from issuance of short term debt									0	0	232
Repayment of long term debt									0	(75,000)	0
Payment to repurchase common stock									(23,844)	(124,519)	(68,712)
Common and preferred stock cash dividends paid									(31,707)	(24,527)	(24,553)
Other, net									142	281	431
Net cash provided/(used) by financing activities									(55,409)	(125,733)	(92,602)
Net change in cash and cash equivalents									8,430	(18,924)	25,436
Cash and cash equivalents at beginning of year				$ 90,022				$ 108,946	90,022	108,946	83,510
Cash and cash equivalents at end of year	$ 98,452				$ 90,022				$ 98,452	$ 90,022	$ 108,946

QUARTERLY DATA (UNAUDITED) (Det

QUARTERLY DATA (UNAUDITED) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Quarterly Financial Information Disclosure [Abstract]
Interest and dividend income	$ 150,537	$ 148,021	$ 145,425	$ 132,316	$ 121,384	$ 103,671	$ 87,379	$ 74,823	$ 576,299	$ 387,257	$ 329,065
Interest expense	62,116	57,687	52,666	34,783	19,292	11,587	6,021	5,760	207,252	42,660	37,899
Net interest income	88,421	90,334	92,759	97,533	102,092	92,084	81,358	69,063	369,047	344,597	291,166
Non-interest income	(8,383)	17,465	17,094	16,606	15,654	16,251	16,351	20,681	42,782	68,937	143,248
Total net revenue	80,038	107,799	109,853	114,139	117,746	108,335	97,709	89,744	411,829	413,534	434,414
Provision expense/(benefit) for credit losses	7,000	8,000	8,000	8,999	12,000	3,000	0	(4,000)	31,999	11,000	(500)
Non-interest expense	78,992	76,513	74,048	71,955	70,014	81,677	68,475	68,550	301,508	288,716	285,893
Income before income taxes	(5,954)	23,286	27,805	33,185	35,732	23,658	29,234	25,194	78,322	113,818	149,021
Income tax (benefit)/expense	(4,509)	3,741	3,944	5,548	5,227	4,941	6,119	4,998	8,724	21,285	30,357
Net income/(loss)	$ (1,445)	$ 19,545	$ 23,861	$ 27,637	$ 30,505	$ 18,717	$ 23,115	$ 20,196	$ 69,598	$ 92,533	$ 118,664
Basic earnings per share (in USD per share)	$ (0.03)	$ 0.45	$ 0.55	$ 0.63	$ 0.69	$ 0.42	$ 0.50	$ 0.42	$ 1.61	$ 2.03	$ 2.41
Diluted earnings per share (in USD per share)	$ (0.03)	$ 0.45	$ 0.55	$ 0.63	$ 0.69	$ 0.42	$ 0.50	$ 0.42	$ 1.60	$ 2.02	$ 2.39
Weighted average common shares outstanding:
Basic (in shares)	42,852	43,164	43,443	43,693	44,105	44,700	45,818	47,668	43,288	45,564	49,240
Diluted (in shares)	43,101	43,347	43,532	44,036	44,484	45,034	46,102	48,067	43,504	45,914	49,554

NET INTEREST INCOME AFTER PRO_3

NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Banking and Thrift, Interest [Abstract]
Net interest income	$ 88,421	$ 90,334	$ 92,759	$ 97,533	$ 102,092	$ 92,084	$ 81,358	$ 69,063	$ 369,047	$ 344,597	$ 291,166
Provision expense/(benefit) for credit losses	7,000	8,000	8,000	8,999	12,000	3,000	0	(4,000)	31,999	11,000	(500)
Net interest income after provision for credit losses									337,048	333,597	291,666
Total non-interest income	(8,383)	17,465	17,094	16,606	15,654	16,251	16,351	20,681	42,782	68,937	143,248
Total non-interest expense	78,992	76,513	74,048	71,955	70,014	81,677	68,475	68,550	301,508	288,716	285,893
Income before income taxes	(5,954)	23,286	27,805	33,185	35,732	23,658	29,234	25,194	78,322	113,818	149,021
Income tax expense	$ (4,509)	$ 3,741	$ 3,944	$ 5,548	$ 5,227	$ 4,941	$ 6,119	$ 4,998	8,724	21,285	30,357
Net income									$ 69,598	$ 92,533	$ 118,664

REVENUE (Details)

REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Non-interest income (in-scope of Topic 606)									$ 42,752	$ 40,874	$ 46,103
Non-interest income (out-of-scope of Topic 606)									30	28,063	97,145
Total non-interest income	$ (8,383)	$ 17,465	$ 17,094	$ 16,606	$ 15,654	$ 16,251	$ 16,351	$ 20,681	42,782	68,937	143,248
Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Non-interest income (in-scope of Topic 606)									24,160	22,396	20,249
Wealth management fees
Disaggregation of Revenue [Line Items]
Non-interest income (in-scope of Topic 606)									10,197	10,008	10,530
Interchange income
Disaggregation of Revenue [Line Items]
Non-interest income (in-scope of Topic 606)									8,395	8,470	8,321
Insurance commissions and fees
Disaggregation of Revenue [Line Items]
Non-interest income (in-scope of Topic 606)									$ 0	$ 0	$ 7,003