Independent Bank (INDB) 10-K 28 Feb 24 2023 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2023	Feb. 26, 2024	Jun. 30, 2023
Entity Information [Line Items]
Document Annual Report	true
Entity File Number	1-9047
Entity Address, Address Line One	2036 Washington Street,
Document Transition Report	false
Entity Incorporation, State or Country Code	MA
Entity Registrant Name	Independent Bank Corp
City Area Code	(781)
Local Phone Number	878-6100
Entity Central Index Key	0000776901
Document Period End Date	Dec. 31, 2023
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Voluntary Filers	No
Entity Public Float			$ 1,946,148,171
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		42,445,920
Entity Address, City or Town	Hanover,
Entity Tax Identification Number	04-2870273
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02339
Documents Incorporated by Reference	Portions of the Registrant’s definitive proxy statement for its 2024 Annual Meeting of Shareholders are incorporated into Part III, Items 10-14 of this Annual Report on Form 10-K. The definitive proxy statement relating to the 2024 Annual Meeting of Shareholders will be filed within 120 days of December 31, 2023.
Current Fiscal Year End Date	--12-31
Auditor Firm ID	42
Auditor Location	Boston, Massachusetts
Auditor Name	Ernst & Young LLP
Entity Well-known Seasoned Issuer	Yes
Document Type	10-K
Document Financial Statement Error Correction [Flag]	false
Mailing Address [Member]
Entity Information [Line Items]
Entity Address, Address Line One	288 Union Street,
Entity Address, City or Town	Rockland,
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02370
NASDAQ/NGS (GLOBAL SELECT MARKET) [Member]
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, $0.01 par value per share
Trading Symbol	INDB
Security Exchange Name	NASDAQ

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022
Assets
Cash and due from banks		$ 178,861	$ 175,843
Interest-earning deposits with banks		45,469	177,090
Debt Securities, Trading		4,987	3,888
Securities
Equity Securities, FV-NI		22,510	21,119
Debt Securities, Available-for-Sale		1,334,256	1,399,154
Held to maturity (fair value $1,417,608 and $1,524,710)		1,569,107	1,705,120
Total securities		2,930,860	3,129,281
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group		6,368	2,803
Loans
Financing Receivable, before Allowance for Credit Loss		14,278,070	13,928,675
Less: allowance for credit losses		(142,222)	(152,419)
Net loans		14,135,848	13,776,256
Federal Home Loan Bank stock		43,557	5,218
Bank premises and equipment, net		193,049	196,504
Other intangible assets		18,190	25,068
Cash surrender value of life insurance policies		297,387	293,323
Other assets		512,712	527,716
Total assets		19,347,373	19,294,174
Deposits
Noninterest-bearing demand deposits		4,567,083	5,441,584
Savings and interest checking accounts		5,298,913	5,898,009
Money market		2,818,072	3,343,673
Time Deposits		2,181,479	1,195,741
Total deposits		14,865,547	15,879,007
Borrowings
Federal Home Loan Bank borrowings		1,105,541	637
Junior subordinated debentures (less unamortized debt issuance costs of $30 and $33)		62,858	62,855
Subordinated debentures (less unamortized debt issuance costs of $20 and $115)		49,980	49,885
Total borrowings		1,218,379	113,377
Other liabilities		368,196	415,089
Total liabilities		16,452,122	16,407,473
Commitments and contingencies		0	0
Stockholders' Equity
Preferred stock, $0.01 par value; authorized: 1,000,000 shares, outstanding: none		0	0
Common stock, $0.01 par value; authorized: 75,000,000 shares, issued and outstanding: 42,873,187 shares at December 31, 2023 and 45,641,238 shares at December 31, 2022 (includes 162,812 and 135,712 shares of unvested participating restricted stock awards, respectively)		427	455
Value of shares held in rabbi trust at cost: 80,222 shares at December 31, 2023 and 80,965 shares at December 31, 2022		(3,298)	(3,227)
Compensation and Benefits Trust		3,298	3,227
Additional paid in capital		1,932,163	2,114,888
Retained earnings		1,077,488	934,442
Accumulated other comprehensive loss, net of tax		(114,827)	(163,084)
Total stockholders' equity		2,895,251	2,886,701
Liabilities and Equity		19,347,373	19,294,174
Commercial And Industrial [Member]
Loans
Financing Receivable, before Allowance for Credit Loss		1,579,986	1,635,103
Commercial Real Estate [Member]
Loans
Financing Receivable, before Allowance for Credit Loss		8,041,508	7,760,230
Construction Loans [Member]
Loans
Financing Receivable, before Allowance for Credit Loss		849,586	1,154,413
Small Business [Member]
Loans
Financing Receivable, before Allowance for Credit Loss		251,956	219,102
Residential Real Estate [Member]
Loans
Financing Receivable, before Allowance for Credit Loss		2,424,754	2,035,524
Home Equity 1st Position [Member] | Senior Lien [Member]
Loans
Financing Receivable, before Allowance for Credit Loss		518,706	566,166
Home Equity Subordinate Position [Member] | Junior Lien [Member]
Loans
Financing Receivable, before Allowance for Credit Loss		578,920	522,584
Consumer Portfolio Segment [Member]
Loans
Financing Receivable, before Allowance for Credit Loss	[1]	$ 32,654	$ 35,553
[1]Other consumer portfolio is inclusive of deposit account overdrafts recorded as loan balances.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale, Amortized Cost	$ 1,459,862	$ 1,566,779
Securities held to maturity, fair value	$ 1,417,608	$ 1,524,710
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	42,873,187	45,641,238
Common stock, shares outstanding	42,873,187	45,641,238
Common stock, unvested restricted Stock awards	162,812	135,712
Shares held in rabbit trust at cost	80,222	80,965
Subordinated Debt [Member]
Unamortized Debt Issuance Expense	$ 20	$ 115
Junior Subordinated Debt [Member]
Unamortized Debt Issuance Expense	$ 30	$ 33

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Interest income
Interest and fees on loans	$ 730,008	$ 577,923	$ 381,433
Interest Income, Securities, Operating, Taxable	60,336	50,354	30,477
Nontaxable interest and dividends on securities	6	6	16
Interest on loans held for sale	190	172	856
Interest on federal funds sold and short-term investments	5,186	14,385	2,494
Total interest and dividend income	795,726	642,840	415,276
Interest expense
Interest on deposits	144,752	24,652	8,327
Interest on borrowings	44,453	4,939	5,390
Total interest expense	189,205	29,591	13,717
Net interest income	606,521	613,249	401,559
Provision for Loan and Lease Losses	23,250	6,500	18,205
Net interest income after provision for credit losses	583,271	606,749	383,354
Noninterest income
Deposit account fees	23,486	23,370	16,745
Interchange and ATM fees	18,108	16,249	12,987
Investment Banking, Advisory, Brokerage, and Underwriting Fees and Commissions	40,191	36,832	35,308
Fees and Commission Mortgage Banking	2,326	3,515	13,280
Increase in cash surrender value of life insurance policies	7,868	7,685	6,431
Gain Realized on Life Insurance Policies	2,291	1,291	258
Derivative, Gain (Loss) on Derivative, Net	3,327	2,932	3,257
Other noninterest income	27,012	22,793	17,584
Total noninterest income	124,609	114,667	105,850
Noninterest expenses
Salaries and employee benefits	222,135	204,711	172,586
Occupancy and equipment expenses	50,582	49,841	36,265
Data processing & facilities management	9,884	9,320	6,899
FDIC assessment	11,953	6,951	3,980
Consulting expense	8,954	9,617	8,271
Cost, Amortization	6,878	7,655	5,715
Debit Card Expense	9,003	7,670	5,144
Merger and acquisition expense	0	7,100	40,840
Software Maintenance	13,115	10,961	8,149
Other noninterest expenses	60,242	59,836	44,680
Total noninterest expenses	392,746	373,662	332,529
Income before income taxes	315,134	347,754	156,675
Income tax benefit	75,632	83,941	35,683
Net Income	$ 239,502	$ 263,813	$ 120,992
Basic earnings per share (in dollars per share)	$ 5.42	$ 5.69	$ 3.47
Diluted earnings per share (in dollars per share)	$ 5.42	$ 5.69	$ 3.47
Weighted average common shares (basic) (in shares)	44,181,540	46,372,051	34,872,034
Common share equivalents (in shares)	12,007	17,938	16,484
Weighted average common shares (diluted) (in shares)	44,193,547	46,389,989	34,888,518
Retained Earnings
Noninterest expenses
Net Income	$ 239,502	$ 263,813	$ 120,992
Cash dividends declared (in dollars per share)	$ 2.20	$ 2.08	$ 1.92

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income		$ 239,502	$ 263,813	$ 120,992
Other comprehensive income (loss), net of tax
Net change in fair value of securities available for sale		32,426	(118,990)	(22,922)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax		16,055	(50,767)	(19,139)
Net change in other comprehensive income for defined benefit postretirement plans	[1]	(224)	4,490	3,549
Total other comprehensive income (loss)		48,257	(165,267)	(38,512)
Total comprehensive income		$ 287,759	$ 98,546	$ 82,480
[1] The amortization of prior service costs is included in the computation of net periodic pension costs as disclosed in Note 12 - Employee Benefit Plans within the Notes to the Consolidated Financial Statements in Item 8.

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands		Total	Common Stock Outstanding	Common Stock	Value of Shares Held in Rabbi Trust at Cost	Deferred Compensation Obligation	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2020		$ 1,702,685		$ 328	$ (3,066)	$ 3,066	$ 945,638	$ 716,024	$ 40,695
Beginning balance (in shares) at Dec. 31, 2020			32,965,692
Net income		120,992						$ 120,992
Other comprehensive loss		(38,512)							(38,512)
Common Stock, Dividends, Per Share, Declared								$ 1.92
Common dividend declared		(70,300)						$ (70,300)
Common stock issued for acquisition		1,298,558		143			1,298,415
Common stock issued for acquisition (in shares)			14,299,720
Stock Repurchased During Period, Value, as a result of Stock Options Exercised		(57)					(57)
Proceeds from exercise of stock options (in shares)			4,744
Stock based compensation		4,309					4,309
Restricted stock awards issued, net of awards surrendered (in shares)			53,768
Restricted stock awards issued, net of awards surrendered		(1,249)		1			(1,250)
Stock Issued During Period, Shares, Other			25,854
Stock Issued During Period, Value, Other		2,023		0			2,023
Increase (Decrease) in Deferred Compensation					(80)	80
Ending balance (in shares) at Dec. 31, 2021			47,349,778
Ending balance at Dec. 31, 2021		3,018,449		472	(3,146)	3,146	2,249,078	766,716	2,183
Net income		263,813						$ 263,813
Other comprehensive loss		(165,267)							(165,267)
Common Stock, Dividends, Per Share, Declared								$ 2.08
Common dividend declared		(96,087)						$ (96,087)
Common stock issued for acquisition		0
Stock based compensation		4,464					4,464
Restricted stock awards issued, net of awards surrendered (in shares)			49,016
Restricted stock awards issued, net of awards surrendered		(1,084)		1			(1,085)
Stock Issued During Period, Shares, Other			29,409
Stock Issued During Period, Value, Other		2,359		0			2,359
Stock Repurchased During Period, Shares			(1,786,965)
Stock Repurchased During Period, Value		(139,946)		(18)			(139,928)
Increase (Decrease) in Deferred Compensation		$ 0
Increase (Decrease) in Deferred Compensation and Other Retirement Benefits					(81)	81
Ending balance (in shares) at Dec. 31, 2022		45,641,238	45,641,238
Ending balance at Dec. 31, 2022		$ 2,886,701		455	(3,227)	3,227	2,114,888	934,442	(163,084)
Net income		239,502						$ 239,502
Other comprehensive loss		48,257							48,257
Common Stock, Dividends, Per Share, Declared								$ 2.20
Common dividend declared		(96,456)						$ (96,456)
Common stock issued for acquisition		0
Proceeds from exercise of stock options, net of cash paid		81					81
Proceeds from exercise of stock options (in shares)			3,238
Stock based compensation		6,377					6,377
Restricted stock awards issued, net of awards surrendered (in shares)			82,181
Restricted stock awards issued, net of awards surrendered		(1,135)		1			(1,136)
Stock Issued During Period, Shares, Other			46,963
Stock Issued During Period, Value, Other		2,682					2,682
Stock Repurchased During Period, Shares	[1]		(2,900,433)
Stock Repurchased During Period, Value	[1]	(190,758)		(29)			(190,729)
Increase (Decrease) in Deferred Compensation		$ 0
Increase (Decrease) in Deferred Compensation and Other Retirement Benefits					(71)	71
Ending balance (in shares) at Dec. 31, 2023		42,873,187	42,873,187
Ending balance at Dec. 31, 2023		$ 2,895,251		$ 427	$ (3,298)	$ 3,298	$ 1,932,163	$ 1,077,488	$ (114,827)
Sales and Excise Tax Payable		$ 1,800
[1]Inclusive of $1.8 million impact of excise tax attributable to shares repurchased under the share repurchase program during the year ended December 31, 2023.

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Cash Flows [Abstract]
Net income	$ 239,502,000	$ 263,813,000	$ 120,992,000
Depreciation, Depletion and Amortization, Nonproduction	36,102,000	38,799,000	32,824,000
Change In Unamortized Net Loan Costs And Premiums	(1,856,000)	(7,119,000)	(24,785,000)
Accretion of acquired loans	(2,251,000)	175,000	(6,882,000)
Provision for credit losses	23,250,000	6,500,000	18,205,000
Deferred income tax expense	2,738,000	(1,254,000)	3,090,000
Equity Securities, FV-NI, Gain (Loss)	(1,180,000)	3,061,000	(554,000)
Gain (Loss) on Disposition of Property Plant Equipment	310,000	(584,000)	139,000
Sale and Leaseback Transaction, Gain (Loss), Net	193,000	578,000	578,000
Share-based Payment Arrangement, Noncash Expense	6,377,000	4,464,000	4,309,000
Life Insurance, Corporate or Bank Owned, Change in Value	(7,877,000)	(7,685,000)	(6,431,000)
Gain Realized on Life Insurance Policies	(2,291,000)	(1,291,000)	(258,000)
Operating Lease, Payments	(13,863,000)	(19,296,000)	(17,456,000)
Increase (Decrease) in Loans Held-for-sale	97,000	(452,000)	(1,679,000)
Increase (Decrease) in Debt Securities, Trading, and Equity Securities, FV-NI	(1,099,000)	(168,000)	(882,000)
Increase (Decrease) in Loans Held-for-sale	(3,468,000)	21,424,000	31,746,000
Increase (Decrease) in Other Operating Assets	23,504,000	65,263,000	93,565,000
Change in other liabilities	(20,614,000)	55,224,000	(58,503,000)
Total adjustments	37,492,000	157,387,000	69,228,000
Net cash provided by operating activities	276,994,000	421,200,000	190,220,000
Proceeds from Sale of Debt and Equity Securities, FV-NI, Held-for-investment	0	31,000	1,164,000
Increase (Decrease) in Equity Securities, FV-NI	(742,000)	(1,524,000)	(2,171,000)
Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale	106,713,000	139,923,000	95,981,000
Payments to Acquire Debt Securities, Available-for-sale	0	(123,289,000)	(1,284,867,000)
Proceeds from maturities and principal repayments of securities held to maturity	140,888,000	166,712,000	263,106,000
Payments to Acquire Held-to-maturity Securities	0	(804,105,000)	(606,543,000)
Net (purchases) redemption of Federal Home Loan Bank stock	(38,339,000)	6,189,000	25,027,000
Investments in low income housing projects	(31,073,000)	(33,232,000)	(22,496,000)
Purchases of life insurance policies	(162,000)	(163,000)	(40,164,000)
Proceeds from Life Insurance Policy	5,531,000	3,160,000	576,000
Payments for (Proceeds from) Loans and Leases	(378,735,000)	(335,448,000)	744,981,000
Cash Acquired in Excess of Payments to Acquire Business	0	0	787,301,000
Payments to Acquire Property, Plant, and Equipment	(15,844,000)	(22,072,000)	(25,200,000)
Proceeds from Sale of Property, Plant, and Equipment	113,000	3,344,000	169,000
Net cash used in investing activities	(211,650,000)	(1,000,474,000)	(63,136,000)
Increase (Decrease) in Time Deposits	985,567,000	(334,381,000)	(235,577,000)
Increase (Decrease) in Other Deposits	(1,999,198,000)	(702,628,000)	1,719,398,000
Increase (Decrease) in Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Net	1,105,000,000	(25,000,000)
Increase Decrease in Federal Home Loan Bank Advances Long Term	0	0	(586,088,000)
Repayments of Long-term Debt	0	(14,063,000)	(18,750,000)
Cash received from stock option exercises	80,000	0
Net payments from exercise of stock options			(57,000)
Issuance Of Restricted Stock Awards, Net of Issuance Cost	(1,142,000)	(1,084,000)	(1,249,000)
Proceeds from shares issued under direct stock purchase plan	2,662,000	2,359,000	2,023,000
Payments for Repurchase of Common Stock	(188,910,000)	(139,946,000)	0
Common dividends paid	(98,006,000)	(93,734,000)	(62,736,000)
Net cash (used in) provided by financing activities	(193,947,000)	(1,308,477,000)	816,964,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(128,603,000)	(1,887,751,000)	944,048,000
Cash and cash equivalents at beginning of year	352,933,000	2,240,684,000	1,296,636,000
Cash and cash equivalents at end of period	224,330,000	352,933,000	2,240,684,000
Supplemental schedule of noncash investing and financing activities
Interest Paid, Excluding Capitalized Interest, Operating Activities	183,068,000	26,424,000	14,004,000
Income taxes	43,706,000	44,274,000	23,353,000
Capital commitment relating to Low Income Housing Project investments, noncash	31,891,000	17,643,000	33,691,000
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	7,916,000	14,789,000	7,768,000
In conjunction with the Company's acquisitions, assets were acquired and liabilities were assumed as follows
Common stock issued for acquisition	0	0	1,298,558,000
Fair value of assets acquired, net of cash acquired	0	0	5,574,209,000
Fair value of liabilities assumed	$ 0	$ 0	$ 5,062,952,000

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2023
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Nature of Operations Independent Bank Corp. (the "Company") is a bank holding company, the principal subsidiary of which is Rockland Trust Company ("Rockland Trust" or the "Bank"). Rockland Trust is a state-chartered commercial bank which provides a variety of banking, investment and financial services through its retail branches, commercial banking centers, investment management offices and mortgage lending centers located throughout Eastern Massachusetts as well as in Worcester County and Rhode Island. Rockland Trust deposits are insured by the Federal Deposit Insurance Corporation, subject to regulatory limits. The Company’s primary source of income is from providing loans to individuals and small-to-medium sized businesses in its market area. Rockland Trust is a community-oriented commercial bank, and the community banking business is the Company's only reportable operating segment. Principles of Consolidation The consolidated financial statements include the accounts of the Company, the Bank and other wholly-owned subsidiaries, except subsidiaries that are not deemed necessary to be consolidated. All significant intercompany balances and transactions have been eliminated in consolidation. The Company determines whether it has a controlling financial interest in an entity by first evaluating whether the entity is a voting interest entity or a variable interest entity under GAAP. Voting interest entities are entities in which the total equity investment at risk is sufficient to enable the entity to finance itself independently and provides the equity holders with the obligation to absorb losses, the right to receive residual returns and the right to make decisions about the entity’s activities. The Company would consolidate voting interest entities in which it has all, or at least a majority of, the voting interest. As defined in applicable accounting standards, variable interest entities ("VIEs") are entities that lack one or more of the characteristics of a voting interest entity. A controlling financial interest in a VIE is present when the Company has both the power and ability to direct the activities of the VIE that most significantly impact the VIE's economic performance and an obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE. The Company also owns the common stock of various trusts which have issued trust preferred securities. These trusts are VIEs in which the Company is not the primary beneficiary and, therefore, are not consolidated. The trust's only assets are junior subordinated debentures issued by the Company, which were acquired by the trust using the proceeds from the issuance of the trust preferred securities and common stock. The junior subordinated debentures are included in long-term debt and the Company’s equity interest in the trust is included in other assets in the accompanying Consolidated Balance Sheets. Interest expense on the junior subordinated debentures is reported in interest expense on long-term debt in the accompanying Consolidated Statements of Income. Reclassification Certain previously reported amounts have been reclassified to conform to the current year’s presentation. Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could vary from these estimates. Material estimates that are particularly susceptible to significant changes in the near-term relate to the determination of the allowance for expected credit losses on loans held for investment, income taxes, valuation and allowance for expected credit losses on investment securities, and the valuation of goodwill and other intangible assets and their respective analyses of impairment. Concentrations of Credit Risk The vast majority of the Bank’s lending activities are conducted in New England. The Bank originates commercial and industrial loans, commercial and residential real estate loans, including construction loans, small business loans, home equity loans, and other consumer loans for its portfolio. The Bank tracks concentrations of credit across numerous categories and segments based on aggregate credit exposure, which includes direct, indirect or contingent obligations to a borrower or group of borrowers engaged in one industry and by property type. The Bank considers a concentration to exist when aggregate credit exposure of a category or segment exceeds 25% of the Bank's total risk-based capital (inclusive of Tier 2 capital instruments). Business Combinations In accordance with applicable accounting guidance, the Company recognizes assets acquired and liabilities assumed at their respective fair values as of the date of acquisition, with the related transaction costs expensed in the period incurred. The Company may use third party valuation specialists to assist in the determination of fair value of certain assets and liabilities at the acquisition date, including loans, core deposit intangibles and time deposits. While the Company uses its best estimates and assumptions to accurately value assets acquired and liabilities assumed on the acquisition date, the estimates are inherently uncertain. The allowance for credit losses on purchased credit deteriorated ("PCD") loans is recognized within business combination accounting. The allowance for credit losses on non-PCD loans is recognized as a provision expense in the same period as the business combination. Cash and Cash Equivalents For purposes of reporting cash flows, cash and cash equivalents may include cash on hand, amounts due from banks, inclusive of interest-earning deposits held at banks, and federal funds sold. Generally, federal funds are sold for up to two week periods. Securities Investment securities are classified at the time of purchase as available for sale, held to maturity, trading, or equity. Classification is constantly re-evaluated for consistency with corporate goals and objectives. Trading and equity securities are recorded at fair value with subsequent changes in fair value recorded in earnings. Debt securities that management has the positive intent and ability to hold to maturity are classified as held to maturity and recorded at amortized cost. Securities not classified as held to maturity or trading are classified as available for sale and recorded at fair value, with changes in fair value excluded from earnings and reported in other comprehensive income, net of related tax. Purchase premiums and discounts are recognized in interest income, using the interest method, to arrive at periodic interest income at a constant effective yield, thereby reflecting the securities market yield. Gains and losses on the sale of securities are recorded on the trade date and are determined using the specific identification method. Such gains and losses are recognized within non-interest income or non-interest expense within the consolidated statements of income. Accrued interest receivable balances are excluded from the amortized cost of held to maturity securities and the fair value of available for sale securities and are included within other assets on the Consolidated Balance Sheets. Management has elected not to measure an allowance for credit losses on these balances as the Company employs a timely write-off policy. It is the Company's policy that a security is placed on nonaccrual status at the time any principal or interest payments become 90 days delinquent, and interest earned but not collected for a security placed on non-accrual is reversed against interest income. Allowance for Credit Losses - Available for Sale Securities The Company's available for sale securities are carried at fair value and assessed for estimated credit losses in accordance with the current expected credit loss ("CECL") methodology. For available for sale securities in an unrealized loss position, management will first evaluate whether there is intent to sell, or if it is more likely than not that the Company will be required to sell a security prior to anticipated recovery of its amortized cost basis. If either of these criteria are met, the Company will record a write-down of the security's amortized cost basis to fair value through income. For those available for sale securities which do not meet the intent or requirement to sell criteria, management will evaluate whether the decline in fair value is a result of credit related matters or other factors. In performing this assessment, management considers the creditworthiness of the issuer including whether the security is guaranteed by the U.S. Federal Government or other government agency, the extent to which fair value is less than amortized cost, and changes in credit rating during the period, among other factors. If this assessment indicates the existence of credit losses, the security will be written down to fair value, as determined by a discounted cash flow analysis. To the extent the estimated cash flows do not support the amortized cost, the deficiency is considered to be due to credit loss and is recognized in earnings. Changes in the allowance for credit losses are recorded as a provision for (or reversal of) credit loss expense. Losses are charged against the allowance when the uncollectibility of a security is confirmed, or when either of the aforementioned criteria surrounding intent or requirement to sell have been met. Allowance for Credit Losses - Held to Maturity Securities The Company measures expected credit losses on held to maturity securities on a collective basis by major security type in accordance with the CECL methodology. Management classifies the held to maturity portfolio into the following major security types: U.S. Government Agency, U.S. Treasury, Agency Mortgage-Backed Securities, Agency Collateralized Mortgage Obligations, Small Business Administration Pooled Securities, and Single Issuer Trust Preferred Securities. Securities in the Company's held to maturity portfolio are primarily guaranteed by either the U.S. Federal Government or other government sponsored agencies with a long history of no credit losses. As a result, management has determined these securities to have a zero loss expectation and therefore does not estimate an allowance for credit losses on these securities. Loans Held for Sale The Bank may choose to classify new residential real estate mortgage loans as held for sale based on intent, which is determined when loans are underwritten. Residential real estate mortgage loans not designated as held for sale are retained based upon available liquidity, for interest rate risk management and other business purposes. The Company has elected the fair value option to account for originated closed loans intended for sale. Accordingly, changes in fair value relating to loans intended for sale are recorded in earnings and are offset by changes in fair value relating to interest rate lock commitments and forward sales commitments. Gains and losses on residential loan sales (sales proceeds minus carrying amount) are recorded in mortgage banking income. Upfront costs and fees related to items for which the fair value option is elected are recognized in earnings as incurred and are not deferred. Loans Held for Investment Loans that the Company has the intent and ability to hold until maturity or payoff are carried at amortized cost (net of the allowance for credit losses). Amortized cost is the principal amount outstanding, adjusted by partial charge-offs and net of deferred loan costs or fees. For originated loans, loan fees and certain direct origination costs are deferred and amortized into interest income over the expected term of the loan using the level-yield method. When a loan is paid off, the unamortized portion is recognized in interest income. Interest income on loans is accrued based upon the daily principal amount outstanding except for loans on nonaccrual status. As a general rule, loans 90 days or more past due with respect to principal or interest are classified as nonaccrual loans, or sooner if management considers such action to be prudent. However, loans that are 90 days or more past due may be kept on an accruing status if the loan is well secured and in the process of collection. Income accruals are suspended on all nonaccrual loans in a timely manner and all previously accrued and uncollected interest is reversed against current income. A loan remains on nonaccrual status until it becomes current with respect to principal and interest and remains current for a minimum period of six months, the loan is liquidated, or when the loan is determined to be uncollectible and is charged-off against the allowance for credit losses. When doubt exists as to the collectability of a loan, any payments received are applied to reduce the amortized cost of the loan to the extent necessary to eliminate such doubt. For all loan portfolios, a charge-off occurs when the Company determines that a specific loan, or portion thereof, is uncollectible. This determination is made based on management's review of specific facts and circumstances of the individual loan, including assessing the viability of the customer’s business or project as a going concern, the expected cash flows to repay the loan, the value of the collateral and the ability and willingness of any guarantors to perform. In the course of resolving problem loans, the Company may choose to modify the contractual terms of certain loans. The Company attempts to work out an alternative payment schedule with the borrower in order to avoid or cure a default. Terms may be modified to fit the ability of the borrower to repay in line with its current financial status and may include adjustments to term extensions, interest rates, other than insignificant payment delays and/or a combination thereof. These actions are intended to minimize economic loss and avoid foreclosure or repossession of collateral. If such efforts by the Bank do not result in satisfactory performance, the loan is referred to legal counsel, at which time foreclosure proceedings are initiated. At any time prior to a sale of the property at foreclosure, the Bank may terminate foreclosure proceedings if the borrower is able to work out a satisfactory payment plan. Any loans that are modified are reviewed by the Company to determine whether the modification is the direct result of a borrower experiencing financial difficulty, as the Company adopted the accounting and disclosure requirements for loan modifications made to borrowers experiencing financial difficulty and ceased to recognize troubled debt restructurings ("TDRs") effective January 1, 2023. Prior to this adoption, the Company would classify loans as TDRs in cases where a borrower was experiencing financial difficult and where the Company made certain concessionary modifications to contractual terms. Modifications included adjustments to interest rates, extensions of maturity, consumer loans where the borrower's obligations had been effectively discharged through Chapter 7 Bankruptcy and the borrower had not reaffirmed the debt to the Bank, and other actions intended to minimize economic loss and avoid foreclosure or repossession of collateral. Under the previously applicable guidance, loans classified as TDRs would have remained classified as such for the life of the loan, except in limited circumstances, when it was determined that the borrower was performing under the modified terms and the restructuring agreement specified an interest rate greater than or equal to an acceptable market rate for a comparable new loan at the time of the restructuring. Allowance for Credit Losses - Loans Held for Investment The allowance for credit losses is established based upon the Company's current estimate of expected lifetime credit losses on loans measured at amortized cost, also referred to as the CECL methodology. Credit losses are charged against the allowance when management's assessments confirm that the Company will not collect the full amortized cost basis of a loan. Subsequent recoveries, if any, are credited to the allowance. Under the CECL methodology, the Company estimates credit losses for financial assets on a collective basis for loans sharing similar risk characteristics using a quantitative model combined with an assessment of certain qualitative factors designed to address forecast risk and model risk inherent in the quantitative model output. The quantitative model utilizes a factor based approach to estimate expected credit losses using Probability of Default ("PD"), Loss Given Default ("LGD") and Exposure at Default ("EAD"), which are derived from internal historical default and loss experience. The model estimates expected credit losses using loan level data over the estimated life of the exposure, considering the effect of prepayments. Economic forecasts are incorporated into the estimate over a reasonable and supportable forecast period, beyond which is a reversion to the Company's historical long-run average. Management has determined a reasonable and supportable period of 12 months, and a straight line reversion period of 6 months, to be appropriate for purposes of estimating expected credit losses. The qualitative risk factors impacting the expected risk of loss within the portfolio include the following: • Lending policies and procedures • Economic and business conditions • Nature and volume of loans • Changes in management • Changes in credit quality • Changes in loan review system • Changes to underlying collateral values • Concentrations of credit risk • Model imprecision • Other external factors Loans that do not share similar risk characteristics with any pools of assets are subject to individual evaluation and are removed from the collectively assessed pools to avoid double counting. For the loans that are individually evaluated, the Company uses either a discounted cash flow (“DCF”) approach or a fair value of collateral approach. The latter approach is used for loans deemed to be collateral dependent or when foreclosure is probable. Loan modifications made to borrowers experiencing financial difficulty are evaluated on a collective basis with loans sharing similar risk characteristics in accordance with the CECL methodology. Under previously applicable accounting guidance, the Company determined the amount of allowance for credit losses on TDRs using a discounted cash flow analysis or a fair value of collateral approach if the loan was determined to be individually evaluated. This change in methodology did not have a material impact on the Company's allowance for credit loss estimate. Accrued interest receivable amounts are excluded from balances of loans held at amortized cost and are included within other assets on the consolidated balance sheets. Management has elected not to measure an allowance for credit losses on these amounts as the Company employs a timely write-off policy. Consistent with the Company's policy for nonaccrual loans, accrued interest receivable is typically written off when loans reach 90 days past due and are placed on nonaccrual status. In the ordinary course of business, the Company enters into commitments to extend credit, commercial letters of credit, and standby letters of credit. Such financial instruments are recorded in the financial statements when they become payable. The credit risk associated with these commitments is evaluated in a manner similar to the allowance for credit losses. The reserve for unfunded lending commitments is included in other liabilities on the Consolidated Balance Sheets. Acquired Loans Loans acquired through purchase or a business combination are recorded at their fair value at the acquisition date. The Company performs an assessment of acquired loans to first determine if such loans have experienced a more than insignificant deterioration in credit quality since their origination and thus should be classified and accounted for as PCD loan. For loans that have not experienced a more than insignificant deterioration in credit quality since origination, referred to as non-PCD loans, the Company records such loans at fair value, with any resulting discount or premium accreted or amortized into interest income over the remaining life of the loan using the interest method. Additionally, upon the purchase or acquisition of non-PCD loans, the Company measures and records a reserve for credit losses based on the Company’s methodology for determining the allowance under CECL. The allowance for non-PCD loans is recorded through a charge to provision for credit losses in the period in which the loans were purchased or acquired. Acquired loans that are classified as PCD are acquired at fair value, including any resulting discounts or premiums. Discounts and premiums are accreted or amortized into interest income over the remaining life of the loan using the interest method. In contrast to non-PCD loans, the initial allowance for credit losses on PCD loans is established through an adjustment to the acquired loan balance, rather than through a charge to provision for credit losses, in the period in which the loans were acquired. The allowance for PCD loans is determined based upon the Company's methodology for estimating the allowance under CECL, and is recorded as an adjustment to the acquired loan balance on the date of acquisition. The Company evaluates acquired loans for deterioration in credit quality based on a variety of characteristics, including, but not limited to non-accrual and delinquency status, downgrades in credit quality since origination, loans that have been modified, along with any other factors identified by the Company through its initial analysis of acquired loans which may indicate there has been a more than insignificant deterioration in credit quality since origination. At the acquisition date, an estimate of expected credit losses is made for groups of PCD loans with similar risk characteristics and individual PCD loans without similar risk characteristics, if applicable. Subsequent to acquisition, the allowance for credit losses for both non-PCD and PCD loans are determined with the use of the Company’s allowance methodology under CECL, in the same manner as all other loans. Transfers and Servicing of Financial Assets Transfers of financial assets 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 (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity. Loans held for sale are generally sold with servicing rights released, however if rights are retained, servicing assets are recognized as separate assets. Servicing rights are originally recorded at fair value within other assets, but subsequently are amortized in proportion to and over the period of estimated net servicing income, and are assessed for impairment at each reporting date. Fair value is based on market prices for comparable mortgage servicing contracts, when available, or alternatively, 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, the custodial earnings rate, an inflation rate, ancillary income, prepayment speeds, default rates and losses. Impairment is determined by stratifying the rights based on predominant characteristics, such as interest rate, loan type and investor type. Impairment is recognized through a valuation allowance, to the extent that fair value is less than the capitalized amount. If the Company later determines that all or a portion of the impairment no longer exists, a reduction of the allowance may be recorded as an increase to income. Servicing fee income is recorded for fees earned for servicing loans for investors. The fees are based on a contractual percentage of the outstanding principal or a fixed amount per loan, and are recorded as income when earned. The amortization of mortgage servicing rights is recorded as a reduction of loan servicing fee income. The Company is also a party to certain instruments with off-balance-sheet risk including certain residential loans sold to investors with recourse. The Company's policy is to record such instruments when funded. Federal Home Loan Bank Stock The Company, as a member of the Federal Home Loan Bank ("FHLB") of Boston, is required to maintain an investment in capital stock of the FHLB. Based on redemption provisions, the stock has no quoted market value and is carried at cost. The Company continually reviews its investment to determine if impairment exists. The Company reviews recent public filings, rating agency analysis and other factors when making its determination. Bank Premises and Equipment Land is carried at cost. Bank premises and equipment are stated at cost less accumulated depreciation. Depreciation is computed using the straight-line convention method over the estimated useful lives of the assets. Leasehold improvements are amortized over the shorter of the lease terms or the estimated useful lives of the improvements. Expected terms include lease option periods to the extent that the exercise of such options is reasonably assured, not to exceed fifteen years. Leases The Company leases office space, space for ATM and parking locations, and certain branch locations under noncancelable operating leases, several of which have renewal options to extend lease terms. Upon commencement of a new lease, the Company will recognize a right of use ("ROU") asset and corresponding lease liability. The Company makes the decision on whether to renew an option to extend a lease by considering various factors. The Company will recognize an adjustment to its ROU asset and lease liability when lease agreements are amended and executed, or in an event where the Company is reasonably certain that a renewal option will be exercised. The discount rate used in determining the present value of lease payments is based on the Company's incremental borrowing rate for borrowings with terms similar to each lease at commencement date. 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 has elected the short-term lease recognition exemption for all leases that qualify. The Company may also assume lease obligations in connection with its acquisition activities, which may result in a market-based favorable or unfavorable lease position, resulting in an intangible lease asset. These intangible lease assets are amortized over the estimated remaining lease term. The Company is a party to certain equipment lease transactions where it has assumed the role of lessor for purchased assets. These lease transactions are classified by the Company as either operating leases or direct financing leases for accounting purposes, depending upon the nature of the underlying lease agreements. Under operating lease arrangements, the leased asset value is recorded within fixed assets and the Company recognizes rental income over the life of the lease. Under direct financing lease arrangements, the leased asset value is de-recognized and offset with the recognition of a lease receivable that is evaluated for impairment in a manner similar to loans. Goodwill and Other Intangible Assets Goodwill represents the excess of the purchase price over the net fair value of acquired businesses. Goodwill is not amortized and is assigned to one reporting unit. Goodwill is evaluated for impairment at least annually, or more often if warranted. In assessing for impairment, the Company has the option to first perform a qualitative analysis to determine whether the existence of events or circumstances leads to a determination that it is more-likely-than-not that the fair value of the reporting unit is less than its carrying amount. If, after assessing the totality of such events and circumstances, the Company determines it is more-likely-than-not that the fair value is less than carrying value, a quantitative impairment test is performed to compare carrying value to the fair value of the reporting unit. The Company also has an unconditional option to bypass the assessment of qualitative factors for any period and proceed directly to the quantitative goodwill impairment test. If the carrying amount of the reporting unit exceeds its fair value, an impairment loss will be recognized in an amount equal to that excess, limited to the total amount of goodwill allocated to that reporting unit. Other intangible assets subject to amortization consist of core deposit intangibles, customer lists, and non-compete agreements that are amortized over the estimated lives of the intangibles using a method that approximates the amount of economic benefits that are realized by the Company. Other intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. Impairment of Long-Lived Assets Other Than Goodwill The Company reviews long-lived assets, including premises and equipment, for impairment whenever events or changes in business circumstances indicate that the remaining useful life may warrant revision or that the carrying amount of the long-lived asset may not be fully recoverable. The Company performs an undiscounted cash flow analysis to determine if impairment exists. When impairment is determined to exist, the related impairment loss is calculated based on fair value. Impairment losses on assets to be disposed of are based on the estimated proceeds to be received, less costs of disposal. Cash Surrender Value of Life Insurance Policies Increases in the cash surrender value ("CSV") of life insurance policies, as well as benefits received net of any CSV, are recorded in other noninterest income, and are generally not subject to income taxes. The CSV of the policies is recorded as an asset of the Bank, with liabilities recognized for any split dollar arrangements associated with the policies. The Company reviews the financial strength of the insurance carriers prior to the purchase of life insurance policies and no less than annually thereafter. Regulatory requirements limit the total amount of CSV to be held with any individual carrier to 15% of Tier 1 capital (as defined for regulatory purposes) and the total CSV of all life insurance policies is limited to 25% of Tier 1 capital. Other Real Estate Owned and Other Foreclosed Assets Real estate properties and other assets, which have served as collateral to secure loans, are held for sale and are initially recorded at fair value less estimated costs to sell at the date control is established, resulting in a new cost basis. The amount by which the recorded investment in the loan exceeds the fair value (net of estimated costs to sell) of the foreclosed asset is charged to the allowance for credit losses. Subsequent declines in the fair value of the foreclosed asset below the new cost basis are recorded through the use of a valuation allowance. Subsequent increases in the fair value are recorded as reductions in the valuation allowance, but not below zero. Upon a sale of a foreclosed asset, any excess of the carrying value over the sale proceeds is recognized as a loss on sale. Any excess of sale proceeds over the carrying value of the foreclosed asset is first applied as a recovery to the valuation allowance, if any, with the remainder being recognized as a gain on sale. Operating expenses and changes in the valuation allowance relating to foreclosed assets are recorded in other n

SECURITIES

SECURITIES	12 Months Ended
	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure	SECURITIES Trading Securities The Company had trading securities of $5.0 million and $3.9 million at December 31, 2023 and 2022, respectively. These securities are held in a rabbi trust and will be used for future payments associated with the Company's non-qualified 401(k) Restoration Plan and Non-qualified Deferred Compensation Plan. Equity Securities The Company had equity securities of $22.5 million and $21.1 million at December 31, 2023 and 2022, respectively. These securities consist primarily of mutual funds held in a rabbi trust and will be used for future payments associated with the Company’s supplemental executive retirement plans. The following table represents a summary of the gains and losses recognized within non-interest income and non-interest expense within the consolidated statements of income that relate to equity securities for the periods indicated: Years Ended December 31 2023 2022 2021 (Dollars in thousands) Net gains (losses) recognized during the period on equity securities $ 1,180 $ (3,061) $ 554 Less: net gains recognized during the period on equity securities sold during the period 197 — 192 Unrealized gains (losses) recognized during the reporting period on equity securities still held at the reporting date $ 983 $ (3,061) $ 362 Available for Sale Securities The following table summarizes the amortized cost, allowance for credit losses, and fair value of available for sale securities and the corresponding amounts of gross unrealized gains and losses recognized in accumulated other comprehensive income (loss) at the dates indicated: December 31, 2023 December 31, 2022 Amortized Gross Gross Unrealized Allowance for credit losses Fair Amortized Gross Gross Unrealized Allowance for credit losses Fair (Dollars in thousands) U.S. government agency securities $ 230,198 $ — $ (23,060) $ — $ 207,138 $ 230,936 $ — $ (28,636) $ — $ 202,300 U.S. treasury securities 824,597 — (55,495) — 769,102 874,035 — (82,694) — 791,341 Agency mortgage-backed securities 314,269 24 (37,246) — 277,047 359,068 54 (45,434) — 313,688 Agency collateralized mortgage obligations 35,713 6 (2,530) — 33,189 41,874 — (3,031) — 38,843 State, county, and municipal securities 195 — (5) — 190 193 — (2) — 191 Pooled trust preferred securities issued by banks and insurers 1,188 — (170) — 1,018 1,203 — (169) — 1,034 Small business administration pooled securities 53,702 — (7,130) — 46,572 59,470 — (7,713) — 51,757 Total available for sale securities $ 1,459,862 $ 30 $ (125,636) $ — $ 1,334,256 $ 1,566,779 $ 54 $ (167,679) $ — $ 1,399,154 Excluded from the table above is accrued interest on available for sale securities of $3.4 million and $3.6 million at December 31, 2023 and 2022, respectively, which is included within other assets When securities are sold, the adjusted cost of the specific security sold is used to compute the gain or loss on the sale. The Company had no sales of securities available for sale for the years ended December 31, 2023 and 2022, and therefore no gains or losses were realized during the periods presented. The following tables show the gross unrealized losses and fair value of the Company’s available for sale securities in an unrealized loss position as of the dates indicated. These available for sale securities are aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position: December 31, 2023 Less than 12 months 12 months or longer Total # of Fair Value Unrealized Fair Unrealized Fair Value Unrealized (Dollars in thousands) U.S. government agency securities 9 $ — $ — $ 207,138 $ (23,060) $ 207,138 $ (23,060) U.S. treasury securities 17 — — 769,102 (55,495) 769,102 (55,495) Agency mortgage-backed securities 115 1,091 (11) 273,447 (37,235) 274,538 (37,246) Agency collateralized mortgage obligations 12 339 (2) 31,682 (2,528) 32,021 (2,530) State, county, and municipal securities 1 190 (5) — — 190 (5) Pooled trust preferred securities issued by banks and insurers 1 — — 1,018 (170) 1,018 (170) Small business administration pooled securities 8 — — 46,572 (7,130) 46,572 (7,130) Total impaired available for sale securities 163 $ 1,620 $ (18) $ 1,328,959 $ (125,618) $ 1,330,579 $ (125,636) December 31, 2022 Less than 12 months 12 months or longer Total # of Fair Value Unrealized Fair Unrealized Fair Value Unrealized U.S. government agency securities 9 $ 60,575 $ (7,292) $ 141,725 $ (21,344) $ 202,300 $ (28,636) U.S. treasury securities 18 43,035 (6,350) 748,306 (76,344) 791,341 (82,694) Agency mortgage-backed securities 123 155,944 (15,186) 154,653 (30,248) 310,597 (45,434) Agency collateralized mortgage obligations 13 38,843 (3,031) — — 38,843 (3,031) State, county, and municipal securities 1 191 (2) — — 191 (2) Pooled trust preferred securities issued by banks and insurers 1 — — 1,034 (169) 1,034 (169) Small business administration pooled securities 8 34,511 (3,550) 17,246 (4,163) 51,757 (7,713) Total impaired available for sale securities 173 $ 333,099 $ (35,411) $ 1,062,964 $ (132,268) $ 1,396,063 $ (167,679) The Company does not intend to sell these investments and has determined, based upon available evidence, that it is more likely than not that the Company will not be required to sell each security before the recovery of its amortized cost basis. In addition, management does not believe that any of the securities are impaired due to reasons of credit quality. As a result, the Company did not recognize a provision for credit losses on these investments for the years ended December 31, 2023 and 2022. The Company made this determination by reviewing various qualitative and quantitative factors regarding each investment category, such as current market conditions, extent and nature of changes in fair value, issuer rating changes and trends, volatility of earnings, and current analysts’ evaluations. As a result of the Company’s review of these qualitative and quantitative factors, the causes of the impairments listed in the table above by category were as follows at December 31, 2023: • U.S. Government Agency Securities, U.S. Treasury Securities, Agency Mortgage-Backed Securities, Agency Collateralized Mortgage Obligations and Small Business Administration Pooled Securities: These portfolios have contractual terms that generally do not permit the issuer to settle the securities at a price less than the current par value of the investment. The decline in market value of these securities is attributable to changes in interest rates and not credit quality. Additionally, these securities are implicitly guaranteed by the U.S. Government or one of its agencies. • State, County and Municipal Securities : This portfolio has contractual terms that generally do not permit the issuer to settle the securities at a price less than the current par value of the investment. The decline in market value of these securities is attributable to changes in interest rates and not credit quality. • Pooled Trust Preferred Securities: This portfolio consists of one security which is performing. The unrealized loss on this security is attributable to the illiquid nature of the trust preferred market in the current economic and regulatory environment. Management evaluates collateral credit and instrument structure, including current and expected deferral and default rates and timing. In addition, discount rates are determined by evaluating comparable spreads observed currently in the market for similar instruments. Held to Maturity Securities The following table summarizes the amortized cost, fair value and allowance for credit losses of held to maturity securities and the corresponding amounts of gross unrealized gains and losses at the dates indicated: December 31, 2023 December 31, 2022 Amortized Gross Gross Unrealized Allowance for credit losses Fair Amortized Gross Gross Unrealized Allowance for credit losses Fair (Dollars in thousands) U.S. government agency securities $ 29,521 $ — $ (1,113) $ — $ 28,408 $ 31,258 $ — $ (2,222) — $ 29,036 U.S. treasury securities 100,712 — (9,177) — 91,535 100,634 — (11,755) — 88,879 Agency mortgage-backed securities 829,431 175 (65,878) — 763,728 898,927 408 (83,383) — 815,952 Agency collateralized mortgage obligations 477,517 — (69,606) — 407,911 535,971 — (77,554) — 458,417 Single issuer trust preferred securities issued by banks 1,500 — (127) — 1,373 1,500 8 — — 1,508 Small business administration pooled securities 130,426 384 (6,157) — 124,653 136,830 313 (6,225) — 130,918 Total held to maturity securities $ 1,569,107 $ 559 $ (152,058) $ — $ 1,417,608 $ 1,705,120 $ 729 $ (181,139) $ — $ 1,524,710 Substantially all held to maturity securities held by the Company are guaranteed by the U.S. federal government or other government sponsored agencies and have a long history of no credit losses. As a result, management has determined these securities to have a zero loss expectation and therefore the Company did not record a provision for estimated credit losses on any held to maturity securities for the years ended December 31, 2023 and 2022. Excluded from the table above is accrued interest on held to maturity securities of $4.3 million and $4.4 million at December 31, 2023 and 2022, respectively, which is included within other assets When securities are sold, the adjusted cost of the specific security sold is used to compute the gain or loss on the sale. The Company had no sales of held to maturity securities for the years ended December 31, 2023 and 2022, and therefore no gains or losses were realized during the periods presented. The Company monitors the credit quality of held to maturity securities through the use of credit ratings. Credit ratings are monitored by the Company on at least a quarterly basis. At December 31, 2023 and 2022, all held to maturity securities held by the Company were rated investment grade or higher. The actual maturities of certain available for sale or held to maturity securities may differ from the contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. A schedule of the contractual maturities of securities available for sale and securities held to maturity at December 31, 2023 is presented below: Due in one year or less Due after one year to five years Due after five to ten years Due after ten years Total Amortized Fair Amortized Fair Amortized Fair Amortized Fair Amortized Fair (Dollars in thousands) Available for sale securities U.S. government agency securities $ — $ — $ 199,371 $ 179,973 $ 30,827 $ 27,165 $ — $ — $ 230,198 $ 207,138 U.S. treasury securities 197,553 193,192 627,044 575,910 — — — — 824,597 769,102 Agency mortgage-backed securities 3 3 141,212 126,484 40,183 34,939 132,871 115,621 314,269 277,047 Agency collateralized mortgage obligations — — — — 2,923 2,680 32,790 30,509 35,713 33,189 State, county, and municipal securities — — 195 190 — — — — 195 190 Pooled trust preferred securities issued by banks and insurers — — — — — — 1,188 1,018 1,188 1,018 Small business administration pooled securities — — — — — — 53,702 46,572 53,702 46,572 Total available for sale securities $ 197,556 $ 193,195 $ 967,822 $ 882,557 $ 73,933 $ 64,784 $ 220,551 $ 193,720 $ 1,459,862 $ 1,334,256 Held to maturity securities U.S. government agency securities $ 29,521 $ 28,408 $ — $ — $ — $ — $ — $ — $ 29,521 $ 28,408 U.S. Treasury securities — — 99,720 90,703 992 832 — — 100,712 91,535 Agency mortgage-backed securities — — 411,746 383,514 222,825 198,122 194,860 182,092 829,431 763,728 Agency collateralized mortgage obligations — — 63,596 58,934 20,210 17,864 393,711 331,113 477,517 407,911 Single issuer trust preferred securities issued by banks — — 1,500 1,373 — — — — 1,500 1,373 Small business administration pooled securities — — — — 5,742 5,272 124,684 119,381 130,426 124,653 Total held to maturity securities $ 29,521 $ 28,408 $ 576,562 $ 534,524 $ 249,769 $ 222,090 $ 713,255 $ 632,586 $ 1,569,107 $ 1,417,608 Total $ 227,077 $ 221,603 $ 1,544,384 $ 1,417,081 $ 323,702 $ 286,874 $ 933,806 $ 826,306 $ 3,028,969 $ 2,751,864 Included in the table above is $25.4 million of callable securities at December 31, 2023. The carrying value of securities pledged to secure public funds, trust deposits, and for other purposes, as required or permitted by law, was $1.7 billion and $959.8 million at December 31, 2023 and 2022, respectively. The elevated balance at December 31, 2023 was primarily attributable to additional securities pledged during the year as part of the Company's strategy to bolster off-balance sheet liquidity. At December 31, 2023 and 2022, the Company had no investments in obligations of individual states, counties, or municipalities which exceeded 10% of stockholders’ equity.

LOANS, ALLOWANCE FOR LOAN LOSSE

LOANS, ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY	12 Months Ended
	Dec. 31, 2023
Receivables [Abstract]
Allowance for Credit Losses	LOANS, ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY Loans Held for Investment and Allowance for Credit Losses The following table summarizes the change in allowance for credit losses by loan category, and bifurcates the amount of loans allocated to each loan category for the periods indicated: Years Ended December 31, 2023 (Dollars in thousands) Commercial and Commercial Commercial Small Residential Other Consumer Total Allowance for credit losses Beginning balance $ 27,559 $ 77,799 $ 10,762 $ 2,834 $ 20,973 $ 11,504 $ 988 $ 152,419 Charge-offs (23,564) (7,855) — (484) — (47) (2,832) (34,782) Recoveries 145 — — 92 — 62 1,036 1,335 Provision for credit losses 15,103 4,204 (3,079) 1,521 2,664 1,278 1,559 23,250 Ending balance (1) $ 19,243 $ 74,148 $ 7,683 $ 3,963 $ 23,637 $ 12,797 $ 751 $ 142,222 Years Ended December 31, 2022 (Dollars in thousands) Commercial and Commercial Commercial Small Residential Other Consumer Total Allowance for credit losses Beginning balance $ 14,402 $ 83,486 $ 12,316 $ 3,508 $ 14,484 $ 17,986 $ 740 $ 146,922 Charge-offs — (62) — (196) — (122) (2,272) (2,652) Recoveries 49 333 — 149 — 121 997 1,649 Provision for credit losses 13,108 (5,958) (1,554) (627) 6,489 (6,481) 1,523 6,500 Ending balance (1) $ 27,559 $ 77,799 $ 10,762 $ 2,834 $ 20,973 $ 11,504 $ 988 $ 152,419 Year Ended December 31, 2021 (Dollars in thousands) Commercial and Commercial Commercial Small Residential Home Equity Other Consumer Total Allowance for credit losses Beginning balance $ 21,086 $ 45,009 $ 5,397 $ 5,095 $ 14,275 $ 22,060 $ 470 $ 113,392 Charge-offs (3,474) — — (219) — (69) (1,182) (4,944) Recoveries 2,686 57 — 98 1 249 638 3,729 Initial reserve on PCD loans 166 14,397 1,019 — 429 163 366 16,540 Provision for credit losses (6,062) 24,023 5,900 (1,466) (221) (4,417) 448 18,205 Ending balance (1) $ 14,402 $ 83,486 $ 12,316 $ 3,508 $ 14,484 $ 17,986 $ 740 $ 146,922 (1) Balances of accrued interest receivable excluded from amortized cost and the calculation of allowance for credit losses amounted to $60.2 million, $50.8 million, and $43.7 million at December 31, 2023, 2022, and 2021, respectively. The balance of allowance for credit losses of $142.2 million at December 31, 2023 decreased by $10.2 million, or 6.7% from the prior year driven primarily by isolated charge-offs within the commercial portfolios, partially offset by general provisioning during the year. For the purpose of estimating the allowance for credit losses, management segregated the loan portfolio into the portfolio segments detailed in the above tables. Each of these loan categories possesses unique risk characteristics that are considered when determining the appropriate level of allowance for each segment. Some of the characteristics unique to each loan category include: Commercial Portfolio • Commercial and Industrial : Consists of revolving, non-revolving, and term loan obligations extended to business and corporate enterprises for the purpose of financing working capital and/or capital investment. Collateral generally consists of accounts receivable, inventory, plant and equipment, real estate, or other business assets. The primary source of repayment is operating cash flow and, secondarily, liquidation of assets. • Commercial Real Estate : Consists of mortgage loans to finance investment in real property such as multi-family residential, commercial/retail, office, industrial, hotels, educational and healthcare facilities, as well as other specific use properties and is inclusive of owner-occupied commercial properties. Loans are typically written with amortizing payment structures. Collateral values are determined based upon third party appraisals and evaluations. Permissible loan to value ratios at origination are governed by Company policy and regulatory guidelines. The primary source of repayment is cash flow from operating leases and rents and, secondarily, liquidation of assets. • Commercial Construction : Consists of short-term construction loans, revolving and nonrevolving credit lines and construction/permanent loans to finance the acquisition, development and construction or rehabilitation of real property. Project types include residential land development, one-to-four family, condominium, and multi-family home construction, commercial/retail, office, industrial, hotels, educational and healthcare facilities as well as other specific use properties. Loans may be written with nonamortizing or hybrid payment structures depending upon the type of project. Collateral values are determined based upon third party appraisals and evaluations. Permissible loan to value ratios at origination are governed by Company policy and regulatory guidelines. Repayment sources vary depending upon the type of project and may consist of proceeds from the sale or lease of units, operating cash flows or liquidation of other assets. • Small Business: Consists of revolving, term loan and mortgage obligations extended to sole proprietors and small businesses for purposes of financing working capital and/or capital investment. Collateral generally consists of pledges of business assets including, but not limited to, accounts receivable, inventory, plant and equipment, or real estate if applicable. The primary source of repayment is operating cash flows and, secondarily, liquidation of assets. For the commercial portfolio the Company typically obtains personal guarantees for payment from individuals holding material ownership interests in the borrowing entities. Consumer Portfolio • Residential Real Estate : Residential mortgage loans held in the Company’s portfolio are made to borrowers who demonstrate the ability to make scheduled payments with full consideration to underwriting factors such as current and expected income, employment status, current assets, other financial resources, credit history and the value of the collateral. Collateral consists of mortgage liens on one-to-four family residential properties. Residential mortgage loans also include loans to construct owner-occupied one-to-four family residential properties. • Home Equity : Home equity loans and credit lines are made to qualified individuals and are primarily secured by senior or junior mortgage liens on one-to-four family homes, condominiums or vacation homes. Each home equity loan has a fixed rate and is billed in equal payments comprised of principal and interest. The majority of home equity lines of credit have a variable rate and are billed in interest-only payments during the draw period. At the end of the draw period, the home equity line of credit is billed as a percentage of the then outstanding principal balance plus all accrued interest over a predetermined repayment period, as set forth in the note. Additionally, the Company has the option of renewing each line of credit for additional draw periods. Borrower qualifications include favorable credit history combined with supportive income requirements and combined loan to value ratios within established policy guidelines. • Other Consumer: Other consumer loan products include personal lines of credit and amortizing loans made to qualified individuals for various purposes such as debt consolidation, personal expenses or overdraft protection. Borrower qualifications include favorable credit history combined with supportive income and collateral requirements within established policy guidelines. These loans may be secured or unsecured. Credit Quality The Company continually monitors the asset quality of the loan portfolio using all available information. Based on this information, loans demonstrating certain payment issues or other weaknesses may be categorized as adversely risk-rated, delinquent, nonperforming and/or put on nonaccrual status. Additionally, in the course of resolving such loans, the Company may choose to modify the contractual terms of certain loans to match the borrower’s ability to repay the loan based on their current financial condition. The Company reviews numerous credit quality indicators when assessing the risk in its loan portfolio. For the commercial portfolio, the Company utilizes a 10-point credit risk-rating system, which assigns a risk-grade to each loan obligation based on a number of quantitative and qualitative factors associated with a commercial or small business loan transaction. Factors considered include industry and market conditions, position within the industry, earnings trends, operating cash flow, asset/liability values, debt capacity, guarantor strength, management and controls, financial reporting, collateral, and other considerations. The risk-rating categories for the commercial portfolio are defined as follows: • Pass: Risk-rating “1” through “6” comprises loans ranging from ‘Substantially Risk Free’ which indicates borrowers are of unquestioned credit standing and the pinnacle of credit quality, well established companies with a very strong financial condition, and loans fully secured by cash collateral, through ‘Acceptable Risk,’ which indicates borrowers may exhibit declining earnings, strained cash flow, increasing or above average leverage and/or weakening market fundamentals that indicate below average asset quality, margins and market share. Collateral coverage is protective. • Special Mention: Borrowers exhibit potential credit weaknesses or downward trends deserving management’s close attention. If not checked or corrected, these trends will weaken the Company’s asset and position. While potentially weak, currently these borrowers are marginally acceptable; no loss of principal or interest is envisioned. • Substandard: Borrowers exhibit well defined weaknesses that jeopardize the orderly liquidation of debt. Loans may be inadequately protected by the current net worth and paying capacity of the obligor or by the collateral pledged, if any. Normal repayment from the borrower is in jeopardy, although no loss of principal is envisioned. However, there is a distinct possibility that a partial loss of interest and/or principal will occur if the deficiencies are not corrected. Collateral coverage may be inadequate to cover the principal obligation. • Doubtful: Borrowers exhibit well defined weaknesses that jeopardize the orderly liquidation of debt with the added provision that the weaknesses make collection of the debt in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. Serious problems exist to the point where partial loss of principal is likely. • Loss: Borrowers deemed incapable of repayment. Loans to such borrowers are considered uncollectible and of such little value that continuation as active assets of the Company is not warranted. The Company utilizes a comprehensive, continuous strategy for evaluating and monitoring commercial credit quality. Initially, credit quality is determined at loan origination and is re-evaluated when subsequent actions, such as renewals, modifications or reviews, occur. Actively managed commercial borrowers are required to provide updated financial information at least annually which is carefully evaluated for any changes in credit quality. Larger loan relationships are subject to a full annual credit review by experienced credit professionals, while continuous portfolio monitoring techniques are employed to evaluate changes in credit quality for smaller loan relationships. Any changes in credit quality are reflected in risk-rating changes. Additionally, the Company retains an independent loan review firm to evaluate the credit quality of the commercial loan portfolio. The independent loan review process achieves significant penetration into the commercial loan portfolio and reports the results of these reviews to the Audit Committee of the Board of Directors on a quarterly basis. For the Company’s consumer portfolio, the quality of the loan is best indicated by the repayment performance of an individual borrower. As a result, for this portfolio the Company utilizes a pass/default risk-rating system, based on an age analysis (i.e., days past due) associated with each consumer loan. Under this structure, consumer loans less than 90 days past due are assigned a "pass" rating, while any consumer loans 90 days or more past due are assigned a "default" rating. The following table details the amortized cost balances of the Company's loan portfolios, presented by credit quality indicator and origination year as of the dates indicated below: December 31, 2023 2023 2022 2021 2020 2019 Prior Revolving Loans Revolving converted to Term Total (1) (Dollars in thousands) Commercial and Pass $ 329,892 $ 165,003 $ 86,982 $ 64,483 $ 45,867 $ 110,135 $ 692,918 $ 90 $ 1,495,370 Special Mention 4,188 668 528 9,358 22 121 28,218 — 43,103 Substandard 1,867 1,329 902 110 917 3,660 32,728 — 41,513 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial and industrial $ 335,947 $ 167,000 $ 88,412 $ 73,951 $ 46,806 $ 113,916 $ 753,864 $ 90 $ 1,579,986 Current-period gross write-offs $ — $ 91 $ — $ — $ — $ 34 $ 23,439 $ — $ 23,564 Commercial real estate Pass $ 1,116,730 $ 1,197,017 $ 1,300,140 $ 1,276,967 $ 592,058 $ 2,078,644 $ 79,360 $ 3,359 $ 7,644,275 Special Mention 62,337 37,510 51,555 13,269 1,859 118,526 — — 285,056 Substandard 37,302 18,321 22,844 4,556 7,881 12,923 — — 103,827 Doubtful — — — — 8,350 — — — 8,350 Loss — — — — — — — — — Total commercial real estate $ 1,216,369 $ 1,252,848 $ 1,374,539 $ 1,294,792 $ 610,148 $ 2,210,093 $ 79,360 $ 3,359 $ 8,041,508 Current-period gross write-offs $ — $ 5,072 $ — $ — $ 2,783 $ — $ — $ — $ 7,855 Commercial construction Pass $ 180,045 $ 381,352 $ 127,431 $ 44,953 $ 23,823 $ 1,561 $ 17,503 $ — $ 776,668 Special Mention 12,106 — 5,292 — — — — — 17,398 Substandard 10,955 26,146 18,419 — — — — — 55,520 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial construction $ 203,106 $ 407,498 $ 151,142 $ 44,953 $ 23,823 $ 1,561 $ 17,503 $ — $ 849,586 Current-period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Small business Pass $ 50,734 $ 51,157 $ 39,435 $ 25,643 $ 12,944 $ 22,412 $ 46,130 $ — $ 248,455 Special Mention — — — 154 — 184 314 — 652 Substandard 530 282 90 475 — 669 803 — 2,849 Doubtful — — — — — — — — — Loss — — — — — — — — — Total small business $ 51,264 $ 51,439 $ 39,525 $ 26,272 $ 12,944 $ 23,265 $ 47,247 $ — $ 251,956 Current-period gross write-offs $ — $ — $ 54 $ 40 $ — $ — $ 390 $ — $ 484 Residential real estate Pass $ 505,517 $ 638,223 $ 405,386 $ 184,833 $ 88,473 $ 598,562 $ — $ — $ 2,420,994 Default — — — — 854 2,906 — — 3,760 Total residential real estate $ 505,517 $ 638,223 $ 405,386 $ 184,833 $ 89,327 $ 601,468 $ — $ — $ 2,424,754 Current-period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Home equity Pass $ 28,903 $ 38,401 $ 54,944 $ 49,803 $ 29,103 $ 121,286 $ 770,074 $ 4,583 $ 1,097,097 Default — — — — — 63 324 142 529 Total home equity $ 28,903 $ 38,401 $ 54,944 $ 49,803 $ 29,103 $ 121,349 $ 770,398 $ 4,725 $ 1,097,626 Current-period gross write-offs $ — $ — $ — $ — $ — $ — $ 47 $ — $ 47 Other consumer (2) Pass $ 639 $ 263 $ 1,178 $ 706 $ 256 $ 1,835 $ 27,769 $ — $ 32,646 Default — — — — 1 — 7 — 8 Total other consumer $ 639 $ 263 $ 1,178 $ 706 $ 257 $ 1,835 $ 27,776 $ — $ 32,654 Current-period gross write-offs $ 2,766 $ — $ — $ — $ — $ 49 $ 17 $ — $ 2,832 Total $ 2,341,745 $ 2,555,672 $ 2,115,126 $ 1,675,310 $ 812,408 $ 3,073,487 $ 1,696,148 $ 8,174 $ 14,278,070 Total current-period gross write-offs $ 2,766 $ 5,163 $ 54 $ 40 $ 2,783 $ 83 $ 23,893 $ — $ 34,782 December 31, 2022 2022 2021 2020 2019 2018 Prior Revolving Loans Revolving converted to Term Total (1) (Dollars in thousands) Commercial and Pass $ 350,036 $ 137,832 $ 113,020 $ 59,936 $ 79,391 $ 18,197 $ 815,128 $ 3,165 $ 1,576,705 Special Mention 4,836 925 1,023 1,744 467 623 17,122 — 26,740 Substandard 2,389 1,681 180 618 — — 3,623 — 8,491 Doubtful — — — — — — 23,167 — 23,167 Loss — — — — — — — — — Total commercial and industrial $ 357,261 $ 140,438 $ 114,223 $ 62,298 $ 79,858 $ 18,820 $ 859,040 $ 3,165 $ 1,635,103 Commercial real estate Pass $ 1,277,333 $ 1,487,333 $ 1,213,984 $ 723,794 $ 696,166 $ 1,833,099 $ 44,477 $ 669 $ 7,276,855 Special Mention 42,005 65,603 39,740 14,167 58,190 183,468 — — 403,173 Substandard 42,629 3,843 4,774 4,066 3,553 21,162 — — 80,027 Doubtful — — — — — 175 — — 175 Loss — — — — — — — — — Total commercial real estate $ 1,361,967 $ 1,556,779 $ 1,258,498 $ 742,027 $ 757,909 $ 2,037,904 $ 44,477 $ 669 $ 7,760,230 Commercial construction Pass $ 504,932 $ 327,194 $ 169,838 $ 56,693 $ 3,135 $ 1,588 $ 23,122 $ 951 $ 1,087,453 Special Mention 33,000 1,775 3,347 — — — — — 38,122 Substandard 18,980 9,858 — — — — — — 28,838 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial construction $ 556,912 $ 338,827 $ 173,185 $ 56,693 $ 3,135 $ 1,588 $ 23,122 $ 951 $ 1,154,413 Small business Pass $ 54,876 $ 44,811 $ 31,051 $ 16,588 $ 9,882 $ 18,891 $ 39,434 $ — $ 215,533 Special Mention — 152 373 366 191 117 686 — 1,885 Substandard 139 98 417 — — 401 629 — 1,684 Doubtful — — — — — — — — — Loss — — — — — — — — — Total small business $ 55,015 $ 45,061 $ 31,841 $ 16,954 $ 10,073 $ 19,409 $ 40,749 $ — $ 219,102 Residential real estate Pass $ 665,407 $ 419,665 $ 193,886 $ 94,065 $ 94,425 $ 565,246 $ — $ — $ 2,032,694 Default — — 729 158 — 1,943 — — 2,830 Total residential real estate $ 665,407 $ 419,665 $ 194,615 $ 94,223 $ 94,425 $ 567,189 $ — $ — $ 2,035,524 Home equity Pass $ 43,917 $ 60,103 $ 54,802 $ 32,014 $ 26,414 $ 118,367 $ 748,294 $ 3,874 $ 1,087,785 Default — — — 122 — 83 760 — 965 Total home equity $ 43,917 $ 60,103 $ 54,802 $ 32,136 $ 26,414 $ 118,450 $ 749,054 $ 3,874 $ 1,088,750 Other consumer (2) Pass $ 677 $ 2,013 $ 1,619 $ 1,022 $ 231 $ 3,023 $ 26,939 $ — $ 35,524 Default — — — 18 — 11 — — 29 Total other consumer $ 677 $ 2,013 $ 1,619 $ 1,040 $ 231 $ 3,034 $ 26,939 $ — $ 35,553 Total $ 3,041,156 $ 2,562,886 $ 1,828,783 $ 1,005,371 $ 972,045 $ 2,766,394 $ 1,743,381 $ 8,659 $ 13,928,675 (1) Loans origination dates in the tables above reflect the original date, or the date of a material modification of a previously originated loan, for both organic originations and acquired loans. (2) Other consumer portfolio is inclusive of deposit account overdrafts recorded as loan balances and the associated gross write-offs. For the Company’s consumer portfolio, the quality of the loan is best indicated by the repayment performance of an individual borrower. However, the Company does supplement performance data with current Fair Isaac Corporation (“FICO”) scores and Loan to Value (“LTV”) estimates. Current FICO data is purchased and appended to all consumer loans on a regular basis. In addition, automated valuation services and broker opinions of value are used to supplement original value data for the residential real estate and home equity portfolios, periodically. The following table shows the weighted average FICO scores and the weighted average combined LTV ratios at the dates indicated below: December 31 December 31 Residential portfolio FICO score (re-scored)(1) 754 753 LTV (re-valued)(2) 59.8 % 57.0 % Home equity portfolio FICO score (re-scored)(1) 770 771 LTV (re-valued)(2)(3) 43.3 % 41.3 % (1) The average FICO scores at December 31, 2023 are based upon rescores from December 2023, as available for previously originated loans, or origination score data for loans booked in December 2023. The average FICO scores at December 31, 2022 were based upon rescores from December 2022, as available for previously originated loans, or origination score data for loans booked in December 2022. (2) The combined LTV ratios for December 31, 2023 are based upon updated automated valuations as of November 2023, when available, and/or the most current valuation data available. The combined LTV ratios for December 31, 2022 were based upon updated automated valuations as of November 2022, when available, and/or the most current valuation data available as of such date. The updated automated valuations provide new information on loans that may be available since the previous valuation was obtained. If no new information is available, the valuation will default to the previously obtained data or most recent appraisal. (3) For home equity loans and lines in a subordinate lien, the LTV data represents a combined LTV, taking into account the senior lien data for loans and lines. Unfunded Commitments Management evaluates the need for a reserve on unfunded lending commitments in a manner consistent with loans held for investment. At December 31, 2023 and 2022, the Company's estimated reserve for unfunded commitments amounted to $1.5 million and $1.3 million, respectively. Asset Quality The Company’s philosophy toward managing its loan portfolios is predicated upon careful monitoring, which stresses early detection and response to delinquent and default situations. Delinquent loans are managed by a team of collection specialists and the Company seeks to make arrangements to resolve any delinquent or default situation over the shortest possible time frame. As a general rule, loans 90 days or more past due with respect to principal or interest are classified as nonaccrual loans. The Company also may use discretion regarding other loans 90 days or more delinquent if the loan is well secured and/or in process of collection. The following table shows information regarding nonaccrual loans at the dates indicated: Nonaccrual Balances December 31, 2023 December 31, 2022 With Allowance for Credit Losses Without Allowance for Credit Losses (2) Total With Allowance for Credit Losses Without Allowance for Credit Losses (2) Total (1) (Dollars in thousands) Commercial and industrial $ 19,890 $ 298 $ 20,188 $ 26,395 $ 298 $ 26,693 Commercial real estate 11,911 11,041 22,952 12,961 2,769 15,730 Small business 394 4 398 99 5 104 Residential real estate 7,634 — 7,634 8,479 — 8,479 Home equity 3,171 — 3,171 3,400 — 3,400 Other consumer 40 — 40 475 — 475 Total nonaccrual loans $ 43,040 $ 11,343 $ 54,383 $ 51,809 $ 3,072 $ 54,881 (1) Nonaccrual balances at December 31, 2022 included $11.5 million of nonaccruing TDRs. (2) Nonaccrual balances reported above without an allowance for credit losses are attributable to loans evaluated on an individual basis where it was determined that there was no risk of loss due to sufficient underlying collateral values. It is the Company's policy to reverse any accrued interest when a loan is put on nonaccrual status, and, as such, the Company did not record any interest income on nonaccrual loans for the years ended December 31, 2023, 2022, and 2021, except for instances where nonaccrual loans were paid off in excess of the recorded book balance. Total accrued interest reversed against interest income amounted to $1.0 million, $1.4 million, and $180,000 for the years ended December 31, 2023, 2022, and 2021, respectively. The following table shows information regarding foreclosed residential real estate property at the dates indicated: December 31, 2023 December 31, 2022 (Dollars in thousands) Foreclosed residential real estate property held by the creditor $ 110 $ — Recorded investment in mortgage loans collateralized by residential real estate property that are in the process of foreclosure $ 1,697 $ 1,615 The following tables show the age analysis of past due financing receivables at the dates indicated: December 31, 2023 30-59 days 60-89 days 90 days or more Total Past Due Total Number Principal Number Principal Number Principal Number Principal Current (Dollars in thousands) Commercial and industrial 6 $ 398 1 $ 17,538 2 $ 673 9 $ 18,609 $ 1,561,377 $ 1,579,986 Commercial real estate 8 14,674 2 8,419 3 7,279 13 30,372 8,011,136 8,041,508 Commercial construction — — — — — — — — 849,586 849,586 Small business 6 400 1 20 6 243 13 663 251,293 251,956 Residential real estate 24 6,216 7 2,187 13 1,573 44 9,976 2,414,778 2,424,754 Home equity 23 1,640 4 1,238 10 529 37 3,407 1,094,219 1,097,626 Other consumer (1) 413 288 14 31 6 8 433 327 32,327 32,654 Total 480 $ 23,616 29 $ 29,433 40 $ 10,305 549 $ 63,354 $ 14,214,716 $ 14,278,070 December 31, 2022 30-59 days 60-89 days 90 days or more Total Past Due Total Number Principal Number Principal Number Principal Number Principal Current (Dollars in thousands) Commercial and industrial 3 $ 49 1 $ 175 3 $ 23,726 7 $ 23,950 $ 1,611,153 $ 1,635,103 Commercial real estate 7 2,052 5 4,971 3 2,977 15 10,000 7,750,230 7,760,230 Commercial construction — — — — — — — — 1,154,413 1,154,413 Small business 12 111 3 25 3 5 18 141 218,961 219,102 Residential real estate 8 1,654 8 1,105 16 1,725 32 4,484 2,031,040 2,035,524 Home equity 19 1,647 3 201 17 965 39 2,813 1,085,937 1,088,750 Other consumer (1) 432 421 15 83 4 28 451 532 35,021 35,553 Total 481 $ 5,934 35 $ 6,560 46 $ 29,426 562 $ 41,920 $ 13,886,755 $ 13,928,675 (1) Other consumer portfolio is inclusive of deposit account overdrafts recorded as loan balances. (2) The amount of net deferred costs on originated loans included in the ending balance was $6.4 million at December 31, 2023, compared to net deferred fees of $5.0 million at December 31, 2022. Net unamortized discounts on acquired loans included in the ending balance was $8.6 million and $10.4 million at December 31, 2023 and 2022, respectively. Loan Modifications The following tables present the amortized cost basis as of December 31, 2023 of loans modified to borrowers experiencing financial difficulty during the twelve months then ended, disaggregated by class of financing receivable and type of modification granted: Year Ended December 31, 2023 Term Extension Amortized Cost Basis % of Total Class of Financing Receivable (Dollars in thousands) Commercial and industrial $ 11,010 0.70% Commercial real estate 17,530 0.22% Small business 208 0.08% Total $ 28,748 Combination - Interest Rate Reduction and Term Extension Amortized Cost Basis % of Total Class of Financing Receivable (Dollars in thousands) Commercial and industrial $ 85 0.01% Small business $ 38 0.02% Total $ 123 Combination - Term Extension and Other-Than-Insignificant Payment Delay Amortized Cost Basis % of Total Class of Financing Receivable (Dollars in thousands) Commercial and industrial $ 1,865 0.12% Commercial real estate 6,505 0.08% Total $ 8,370 The following table describes the financial effect of the modifications made to borrowers experiencing financial difficulty for the year ended December 31, 2023: Term Extension Financial Effect Commercial and industrial Added a weighted-average contractual term of 2 months to the life of the loans Commercial real estate Added a weighted-average contractual term of 1.9 years to the life of the loans Small business Added a weighted-average contractual term of 4.7 years to the life of the loans Interest Rate Reduction Financial Effect Commercial and industrial Reduced contractual rate on one loan from 10.00% to 7.00% Small business Reduced contractual rate on one loan from 10.00% to 6.50% 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 depicts the amortized cost and payment status of loans that have been modified in the last 12 months as of December 31, 2023: Current (1) 30-89 Days Past Due 90+ Days Past Due Total (Dollars in thousands) Commercial and industrial $ 12,585 $ — $ 375 $ 12,960 Commercial real estate 23,899 — 136 24,035 Small business 246 — — 246 Total $ 36,730 $ — $ 511 $ 37,241 (1) Current category is inclusive of $8.4 million in nonaccrual loans which have yet to reach the six consecutive months of performance required to return to accruing status in accordance with the Company's accounting policy for nonaccrual loans The Company considers a loan to have defaulted when it reaches 90 days past due. The table below shows the amortized cost basis of financing receivables modified during the twelve months ended December 31, 2023 that subsequently defaulted: Term Extension Combination - Term Extension and Other Than Insignificant Payment Delay Total (Dollars in thousands) Commercial and industrial $ 374 $ — $ 374 Commercial real estate 136 6,505 6,641 Total $ 510 $ 6,505 $ 7,015 At December 31, 2023, the Company did not have any additional commitments to lend to borrowers experiencing financial difficulty who were party to a loan modification. The Company adopted the accounting and disclosure requirements for loan modifications made to borrowers experiencing financial difficulty and ceased to recognize TDRs effective January 1, 2023. As such, there are no current year TDRs and the prior period amounts are shown in the tables below. The following table shows the Company’s total TDRs and other pertinent TDR information as of December 31, 2022: (Dollars in thousands) TDRs on accrual status $ 11,278 TDRs on nonaccrual 11,520 Total TDRs $ 22,798 Additional commitments to lend to a borrower who has been a party to a TDR $ 64 The following table shows the troubled debt restructurings which occurred for the periods indicated and the change in the recorded investment subsequent to the modifications occurring: Year Ended December 31, 2022 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (Dollars in thousands) Commercial and industrial 4 $ 3,466 $ 3,465 Commercial real estate 1 7,850 7,850 Total (1) 5 $ 11,316 $ 11,315 Year Ended December 31, 2021 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (Dollars in thousands) Commercial and industrial 1 $ 14,148 $ 14,148 Commercial real estate 5 3,964 3,964 Small business 2 189 189 Total (1) 8 $ 18,301 $ 18,301 (1) The pre-modification and post-modification balances represent the legal principal balance of the loan. Activity presented in the tables above includes $14.3 million of modifications on existing TDRs during the year ended December 31, 2021. The following table shows the Company's post-modification balance of TDR's listed by type of modification for the periods indicated: Year Ended December 31 2022 2021 (Dollars in thousands) Extended maturity $ 11,315 $ 4,153 Combination rate and maturity — 14,148 Total $ 11,315 $ 18,301 During the twelve months ended December 31, 2022 and 2021, respectively, there were no loans modified during the prior twelve months that subsequently defaulted during the respective periods.

BANK PREMISES AND EQUIPMENT

BANK PREMISES AND EQUIPMENT	12 Months Ended
	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
BANK PREMISES AND EQUIPMENT	BANK PREMISES AND EQUIPMENT Bank premises and equipment at December 31, were as follows: 2023 2022 Estimated (Dollars in thousands) (In years) Cost Land $ 52,844 $ 52,844 n/a Bank premises 99,973 97,760 5-40 Leasehold improvements 50,682 47,098 1-15 Furniture and equipment 102,251 93,450 1-10 Leased equipment 32,654 32,792 5 Total cost 338,404 323,944 Accumulated depreciation (145,355) (127,440) Net bank premises and equipment $ 193,049 $ 196,504 Depreciation expense related to bank premises and equipment was $18.9 million, $18.4 million, and $12.5 million for the years ended December 31, 2023, 2022 and 2021, respectively, and is primarily reflected in occupancy and equipment expenses. Leased equipment held by the Company totaled $32.7 million and $32.8 million at December 31, 2023 and 2022, respectively. The leased equipment is subject to a master lease agreement entered into during 2021 with a third party lessee and the Company assumes the role of lessor in the transaction, which is deemed an operating lease for accounting purposes. The Company recognized rental income of $6.4 million, $6.1 million and $890,000 for the years ended December 31, 2023, 2022 and 2021, respectively

GOODWILL AND IDENTIFIABLE INTAN

GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS	12 Months Ended
	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS	GOODWILL AND OTHER INTANGIBLE ASSETS The following table sets forth the carrying value of goodwill and other intangible assets, net of accumulated amortization, at December 31: 2023 2022 (Dollars in thousands) Balances not subject to amortization Goodwill $ 985,072 $ 985,072 Balances subject to amortization Core deposit intangibles 15,237 20,757 Other intangible assets 2,953 4,311 Total other intangible assets 18,190 25,068 Total goodwill and other intangible assets $ 1,003,262 $ 1,010,140 The changes in the carrying value of goodwill for the periods indicated were as follows: 2023 2022 2021 (Dollars in thousands) Balance at beginning of year $ 985,072 $ 985,072 $ 506,206 Acquisitions — — 478,866 Balance at end of year $ 985,072 $ 985,072 985,072 The gross carrying amount and accumulated amortization of other intangible assets were as follows at the dates indicated: December 31 2023 2022 Gross Accumulated Net Gross Accumulated Net (Dollars in thousands) Core deposit intangibles $ 46,770 $ (31,533) $ 15,237 $ 46,770 $ (26,013) $ 20,757 Other intangible assets 6,100 (3,147) 2,953 6,100 (1,789) 4,311 Total $ 52,870 $ (34,680) $ 18,190 $ 52,870 $ (27,802) $ 25,068 The following table sets forth the estimated annual amortization expense of intangible assets for each of the next five years: Year Amount (Dollars in thousands) 2024 $ 5,905 2025 $ 4,716 2026 $ 2,820 2027 $ 2,077 2028 $ 1,377 The original weighted average amortization period for intangible assets is 9.5 years.

DEPOSITS

DEPOSITS	12 Months Ended
	Dec. 31, 2023
Deposits [Abstract]
DEPOSITS	DEPOSITS The following is a summary of the scheduled maturities of time deposits at December 31: 2023 2022 (Dollars in thousands) 1 year or less $ 2,056,543 94.3 % $ 953,214 79.7 % Over 1 year to 2 years 97,055 4.4 % 150,102 12.5 % Over 2 years to 3 years 15,594 0.7 % 66,995 5.6 % Over 3 years to 4 years 8,585 0.4 % 15,172 1.3 % Over 4 years to 5 years 3,702 0.2 % 10,258 0.9 % Total (1) $ 2,181,479 100.0 % $ 1,195,741 100.0 % (1) The total amount of time deposit accounts with balances equal to or greater than $250,000 at December 31, 2023 and 2022 was $571.2 million and $251.1 million, respectively. The Company had pledged assets as collateral covering certain deposits in the amount of $900.2 million and $952.7 million at December 31, 2023 and 2022, respectively.

STOCK BASED COMPENSATION

STOCK BASED COMPENSATION	12 Months Ended
	Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]
STOCK BASED COMPENSATION	STOCK BASED COMPENSATION The Company's stock based plans include the 2018 Non-Employee Director St ock Plan (the "2018 Plan") and the 2023 Omnibus Incentive Plan (the "2023 Plan"), which have been approved by the Company’s Board of Directors and shareholders. Shares from the 2018 Plan may be awarded in the form of stock options or restricted stock, and shares from the 2023 Plan may be awarded in the form of stock options, stock appreciation rights, restricted stock, restricted stock units, or other stock-based awards from its pool of authorized but unissued shares. Upon adoption of the 2023 Plan on May 18, 2023, the Second Amended and Restated 2005 Employee Stock Plan (the "2005 Plan") was terminated in its entirety and the Company will no longer grant awards under the 2005 Plan, however awards outstanding under the 2005 Plan will continue to remain outstanding in accordance with their terms. The following table presents the amount of cumulatively granted stock option awards and restricted stock awards, net of forfeitures and expirations, granted through December 31, 2023: Authorized Awards Cumulatively Granted, Net of Total Authorized Stock Restricted 2005 Plan 1,650,000 387,258 1,060,821 1,448,079 n/a 2018 Plan 300,000 — 50,767 50,767 249,233 2023 Plan 1,126,886 — 9,640 9,640 1,117,246 The following table presents the pre-tax expense associated with stock option and restricted stock awards and the related tax benefits recognized for the periods presented: Years Ended December 31 2023 2022 2021 (Dollars in thousands) Stock based compensation expense Restricted stock awards (1) $ 5,777 $ 3,791 $ 3,580 Directors’ fee expense (2) Restricted stock awards 600 673 729 Total stock based award expense $ 6,377 $ 4,464 $ 4,309 Related tax benefits recognized in earnings $ 1,793 $ 1,255 $ 1,212 (1) Inclusive of compensation expense associated with time-vested and performance-based restricted stock awards. (2) Expense related to awards issued to directors is recognized as directors’ fees within other noninterest expense. The Company has standard form agreements used for stock option and restricted stock awards. The standard form agreements used for the Chief Executive Officer and all other Executive Officers have previously been disclosed in Securities and Exchange Commission filings and generally provide that: (1) any unvested options or unvested restricted stock vest upon a Change of Control; and, that (2) any stock options which vest pursuant to a Change of Control, which is an event described in Section 280G of the Internal Revenue Code of 1986, will be cashed out at the difference between the acquisition price and the exercise price of the stock option. Stock Options The fair value of each stock option grant is estimated on the date of the grant using the Black-Scholes option-pricing model with the following assumptions used for grants under the identified plans: • Expected volatility is based on the standard deviation of the historical volatility of the weekly adjusted closing price of the Company’s shares for a period equivalent to the expected life of the option. • Expected life represents the period of time that the option is expected to be outstanding, taking into account the contractual term, historical exercise/forfeiture behavior, and the vesting period, if any. • Expected dividend yield is an annualized rate calculated using the most recent dividend payment at time of grant and the Company’s average trailing twelve-month daily closing stock price. • The risk-free rate is based on the U.S. Treasury yield curve in effect at the time of grant for a period equivalent to the expected life of the option. • Forfeitures on stock compensation are recognized when they occur. For the years ended December 31, 2023, 2022 and 2021, there were no awards granted by the Company of nonqualified options to purchase shares of common stock. Under all of the Company’s stock based plans, the option exercise price is based upon the average of the high and low trading value of the stock on the date of grant. Stock option awards granted to date under all plans expire at various dates through 2028. The following table presents relevant information relating to the Company’s stock options for the periods presented: Years Ended December 31 2023 2022 2021 (Dollars in thousands, except per share data) Fair value of stock options vested based on grant date fair value $ — $ — $ — Intrinsic value of stock options exercised $ 139 $ — $ 414 Cash received from stock option exercises $ 257 $ — $ 233 Tax benefit realized on stock option exercises $ 39 $ — $ 116 The following table presents a summary of stock option award activity for the year ended December 31, 2023: Outstanding Stock Option Weighted Weighted Aggregate (Dollars in thousands, except per share data) Balance at January 1, 2023 20,000 $ 56.18 Granted — — Exercised (6,666) 38.63 Balance of options outstanding, vested and exercisable at December 31, 2023 13,334 (2) $ 64.94 3.40 years $ 62 (1) The aggregate intrinsic value represents the total pre-tax intrinsic value, based on the average of the high price and low price at which the Company’s common stock traded on December 31, 2023 of $66.57, which would have been received by in-the-money option holders had they all exercised their options as of that date. (2) Represents vested stock options outstanding to Directors. For the year ended December 31, 2023, all outstanding stock option awards are vested and there is no unrecognized compensation expense related to those options. Restricted Stock The Company grants both time-vested restricted stock awards as well as performance-based restricted stock awards. The fair value of the restricted stock awards are based upon the average of the high and low prices at which the Company’s common stock traded on the date of grant. The holders of time-vested restricted stock awards participate fully in the rewards of stock ownership of the Company, including voting and dividend rights. The holders of performance-based restricted stock awards do not participate in the rewards of stock ownership of the Company until vested. The holders of all restricted stock awards are not required to pay any consideration to the Company for the awards. During the years ended December 31, 2023, 2022, and 2021 the Company made the following restricted stock award grants: Shares Granted Plan Fair Value Vesting Period Time-vested 2023 2/16/2023 77,525 2005 $ 80.65 Ratably over 3 years from grant date 2/16/2023 12,309 2005 $ 80.65 Ratably over 5 years beginning on February 6, 2023 5/15/2023 1,080 2005 $ 46.21 Ratably over 3 years from grant date 5/23/2023 12,410 2018 $ 48.35 Immediately upon grant date 5/30/2023 890 2023 $ 45.09 Ratably over 3 years from grant date 9/15/2023 5,270 2023 $ 51.44 Ratably over 5 years from grant date 9/15/2023 3,020 2023 $ 51.44 Ratably over 3 years from grant date 12/15/2023 460 2023 $ 66.24 Ratably over 3 years from grant date 2022 2/17/2022 52,100 2005 $ 84.70 Ratably over 5 years from grant date 5/24/2022 8,099 2018 $ 80.39 Immediately upon grant date 9/15/2022 646 2005 $ 77.44 Ratably over 5 years from grant date 2021 2/18/2021 49,550 2005 $ 81.84 Ratably over 5 years from grant date 5/25/2021 7,680 2018 $ 78.18 Immediately upon grant date 9/1/2021 640 2018 $ 76.78 Immediately upon grant date Performance-based 2/16/2023 32,200 2005 $ 80.65 The earlier of: the date on which it is determined if the performance goal has been achieved; or, March 31, 2026. 2/17/2022 20,700 2005 $ 84.70 The earlier of: the date on which it is determined if the performance goal has been achieved; or, March 31, 2025. 2/18/2021 18,900 2005 $ 81.84 The earlier of: the date on which it is determined if the performance goal has been achieved; or, March 31, 2024. The following table presents the fair value of restricted stock awards that vested during the periods presented: Years Ended December 31 2023 2022 2021 (Dollars in thousands) Fair value of restricted stock awards upon vesting $ 5,003 $ 5,148 $ 5,754 The following table presents a summary of restricted stock award activity for the year ended December 31, 2023: Outstanding Restricted Stock Weighted Average Balance at January 1, 2023 191,412 $ 80.15 Granted 145,164 75.70 Vested/released (70,194) 71.94 Forfeited (1) (49,175) 80.93 Balance at December 31, 2023 217,207 (2) $ 79.65 Unrecognized compensation cost (in thousands) (2) $ 10,222 Weighted average remaining recognition period (years) 2.48 years (1) Forfeited amounts are inclusive of 3,220 performance-based shares that were not vested based on performance objective criteria results, and 17,405 performance-based shares that were cancelled based on the departure of certain executives of the Company. (2) There are no unvested restricted stock awards outstanding to Directors and therefore no related unrecognized compensation cost for Directors.

DERIVATIVES AND HEDGING ACTIVIT

DERIVATIVES AND HEDGING ACTIVITIES	12 Months Ended
	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Fair Value	DERIVATIVES AND HEDGING ACTIVITIES The Company’s derivative financial instruments are used to manage differences in the amount, timing, and duration of the Company’s known or expected cash receipts and its known or expected cash payments principally to manage the Company’s interest rate risk. Additionally, the Company enters into interest rate derivatives, foreign exchange contracts and risk participation agreements to accommodate the business requirements of its customers (“customer related positions”). The Company minimizes the market and liquidity risks of customer related positions by entering into similar offsetting positions with broker-dealers. Derivative instruments are carried at fair value in the Company's financial statements. The accounting for changes in the fair value of a derivative instrument is dependent upon whether or not it qualifies as a hedge for accounting purposes, and further, by the type of hedging relationship. The Company does not enter into proprietary trading positions for any derivatives. The Company is subject to over-the-counter derivative clearing requirements which require certain derivatives to be cleared through central clearing houses. Accordingly, the Company clears certain derivative transactions through the Chicago Mercantile Exchange Clearing House ("CME"). This clearing house requires the Company to post initial and variation margin to mitigate the risk of non-payment, the latter of which is received or paid daily based on the net asset or liability position of the contracts. Interest Rate Positions The Company may utilize various interest rate derivatives as hedging instruments against interest rate risk associated with the Company’s borrowings and loan portfolios. An interest rate derivative is an agreement whereby one party agrees to pay a floating rate of interest on a notional principal amount in exchange for receiving a fixed rate of interest on the same notional amount, for a predetermined period of time, from a second party. The amounts relating to the notional principal amount are not actually exchanged. The following tables reflect information about the Company’s derivative positions at the dates indicated below for interest rate swaps which qualify as cash flow hedges for accounting purposes: December 31, 2023 Weighted Average Rate Notional Amount Weighted Average Maturity Current Pay Fixed Fair Value (in thousands) (in years) (in thousands) Interest rate swaps on borrowings $ 400,000 2.58 5.34 % 3.67 % $ 1,901 Current Rate Paid Receive Fixed Interest rate swaps on loans $ 850,000 2.50 5.36 % 2.72 % $ (27,350) Current Rate Paid Receive Fixed Swap Rate Interest rate collars on loans 350,000 1.48 5.45 % 3.09% - 2.12% (4,714) Total $ 1,600,000 $ (30,163) December 31, 2022 Weighted Average Rate Notional Amount Average Maturity Current Pay Fixed Fair Value (in thousands) (in years) (in thousands) Interest rate swaps on loans 1,050,000 2.97 4.24 % 2.66 % (42,005) Current Rate Paid Receive Fixed Swap Rate Interest rate collars on loans 400,000 2.27 4.22 % 3.09% - 2.19% (10,239) Total $ 1,450,000 $ (52,244) The maximum length of time over which the Company is currently hedging its exposure to the variability in future cash flows for forecasted transactions related to the payment of variable interest on existing financial instruments is 5.2 years. For derivative instruments that are designated and qualify as cash flow hedging instruments, the effective portion of the gains or losses is reported as a component of other comprehensive income and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. The Company expects approximately $3.9 million (pre-tax) to be reclassified as an increase to interest income and $19.9 million (pre-tax) to be reclassified as an increase to interest expense, from OCI related to the Company’s cash flow hedges in the twelve months following December 31, 2023. This reclassification is due to anticipated payments that will be made and/or received on the swaps based upon the forward curve at December 31, 2023. The Company had no fair value hedges for the years ended December 31, 2023 and 2022. Customer Related Positions Loan level derivatives, primarily interest rate swaps, offered to commercial borrowers through the Company’s loan level derivative program do not qualify as hedges for accounting purposes. The Company believes that its exposure to commercial customer derivatives is limited because these contracts are simultaneously matched at inception with an offsetting dealer transaction. Derivatives with dealer counterparties are then either cleared through a clearinghouse or settled directly with a single counterparty. The commercial customer derivative program allows the Company to retain variable-rate commercial loans while allowing the customer to synthetically fix the loan rate by entering into a variable-to-fixed interest rate swap. The amounts relating to the notional principal amount are not actually exchanged. Foreign exchange contracts offered to commercial borrowers through the Company’s derivative program do not qualify as hedges for accounting purposes. The Company acts as a seller and buyer of foreign exchange contracts to accommodate its customers. To mitigate the market and liquidity risk associated with these derivatives, the Company enters into similar offsetting positions. The amounts relating to the notional principal amount are exchanged. The Company has entered into risk participation agreements with other dealer banks in commercial loan agreements. Participating banks guarantee the performance on borrower-related interest rate swap contracts. These derivatives are not designated as hedges and, therefore, changes in fair value are recognized in earnings. Under a risk participation-out agreement, a derivative asset, the Company participates out a portion of the credit risk associated with the interest rate swap position executed with the commercial borrower for a fee paid to the participating bank. Under a risk participation-in agreement, a derivative liability, the Company assumes, or participates in, a portion of the credit risk associated with the interest rate swap position with the commercial borrower for a fee received from the other bank. The following tables reflect the Company’s customer related derivative positions at the dates indicated below for those derivatives not designated as hedging: Number of Notional Amount Maturing Less than 1 year Less than 2 years Less than 3 years Less than 4 years Thereafter Total Fair Value December 31, 2023 (Dollars in thousands) Loan level swaps Receive fixed, pay variable 281 $ 80,682 $ 252,260 $ 223,928 $ 230,513 $ 997,108 $ 1,784,491 $ (88,415) Pay fixed, receive variable 281 80,682 252,260 223,928 230,513 997,108 1,784,491 88,280 Foreign exchange contracts Buys foreign currency, sells U.S. currency 22 65,586 12,957 — — — 78,543 2,197 Buys U.S. currency, sells foreign currency 22 65,586 12,957 — — — 78,543 (2,160) Risk participation agreements Participation out 17 — 24,193 — 13,119 114,027 151,339 200 Participation in 8 — — 13,016 18,989 15,725 47,730 (44) Number of Notional Amount Maturing Less than 1 year Less than 2 years Less than 3 years Less than 4 years Thereafter Total Fair Value December 31, 2022 (Dollars in thousands) Loan level swaps Receive fixed, pay variable 283 $ 80,531 $ 96,613 $ 256,924 $ 193,096 $ 1,016,312 $ 1,643,476 $ (118,930) Pay fixed, receive variable 283 80,531 96,613 256,924 193,096 1,016,312 1,643,476 118,928 Foreign exchange contracts Buys foreign currency, sells U.S. currency 49 124,982 13,363 — — — 138,345 306 Buys U.S. currency, sells foreign currency 49 124,982 13,363 — — — 138,345 (232) Risk participation agreements Participation out 13 2,595 — 24,538 — 95,514 122,647 161 Participation in 6 27,365 — — — 25,849 53,214 (15) (1) The Company may enter into one dealer swap agreement which offsets multiple commercial borrower swap agreements. Mortgage Derivatives The Company enters into commitments to fund residential mortgage loans at specified rates and times in the future, with the intention that loans may be sold subsequently in the secondary market. Mortgage loan commitments are referred to as derivative loan commitments if the loan that will result from exercise of the commitment will be held for sale upon funding. These commitments are recognized at fair value on the consolidated balance sheet in other assets and other liabilities with changes in their fair values recorded within mortgage banking income. In addition, the Company has elected the fair value option to carry loans held for sale at fair value. The change in fair value of loans held for sale is recorded in current period earnings as a component of mortgage banking income in accordance with the Company's fair value election. The fair value of loans held for sale increased by $97,000 for the year ended December 31, 2023 and decreased by $452,000 and $1.7 million for the years ended December 31, 2022 and 2021, respectively. These amounts were offset in earnings by the change in the fair value of mortgage derivatives. Outstanding loan commitments expose the Company to the risk that the price of the loans arising from exercise of the loan commitment might change from inception of the rate lock to funding of the loan due to changes in mortgage interest rates. If interest rates increase, the value of these loan commitments decreases. Conversely, if interest rates decrease, the value of these loan commitments increases. To protect against the price risk inherent in derivative loan commitments, the Company utilizes both "mandatory delivery" and "best efforts" forward loan sale commitments to mitigate the risk of potential decreases in the values of loans that would result from the exercise of the derivative loan commitments. Mandatory delivery contracts are accounted for as derivative instruments. Included in the mandatory delivery forward commitments are To Be Announced securities ("TBAs"). Certain assumptions, including pull through rates and rate lock periods, are used in managing the existing and future hedges. The accuracy of underlying assumptions will impact the ultimate effectiveness of any hedging strategies. With mandatory delivery contracts, 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. If the Company fails to deliver the amount of mortgages necessary to fulfill the commitment by the specified date, it is obligated to pay a "pair-off" fee, based on then-current market prices, to the investor/counterparty to compensate the investor for the shortfall. Generally, the Company makes this type of commitment once mortgage loans have been funded and are held for sale, in order to minimize the risk of failure to deliver the requisite volume of loans to the investor and paying pair-off fees as a result. The Company also sells TBA securities to offset potential changes in the fair value of derivative loan commitments. Generally the Company sells TBA securities by entering into derivative loan commitments for settlement in 30 to 90 days. The Company expects that mandatory delivery contracts, including TBA securities, will experience changes in fair value opposite to the changes in the fair value of derivative loan commitments. With best effort contracts, 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. Generally, best efforts cash contracts have no pair off risk regardless of market movement. The price the investor will pay the seller for an individual loan is specified prior to the loan being funded (e.g., on the same day the lender commits to lend funds to a potential borrower). The Company expects that these best efforts forward loan sale commitments will experience a net neutral shift in fair value with related derivative loan commitments. The aggregate amount of net realized gains on sales of mortgage loans included within mortgage banking income was $1.0 million, $562,000 and $19.9 million for the years ended December 31, 2023, 2022 and 2021, respectively. Balance Sheet Offsetting The Company does not offset fair value amounts recognized for derivative instruments. The Company does net the amount recognized for the right to reclaim cash collateral against the obligation to return cash collateral arising from derivative instruments executed with the same counterparty under a master netting arrangement. Collateral legally required to be maintained at dealer banks by the Company is monitored and adjusted as necessary. A daily settlement occurs through the CME for changes in the fair value of centrally cleared derivatives. Not all of the derivatives are required to be cleared through the daily clearing agent. As a result, the total fair values of loan level derivative assets and liabilities recognized on the Company's financial statements are not equal and offsetting. The table below presents the fair value of the Company’s derivative financial instruments, as well as their classification on the balance sheet at the dates indicated: Asset Derivatives (1) Liability Derivatives (2) Fair Value at Fair Value at Fair Value at Fair Value at December 31, 2023 December 31, 2022 December 31, 2023 December 31, 2022 (Dollars in thousands) Derivatives designated as hedges Interest rate derivatives $ 1,927 (3) $ — (3) $ 32,090 (4) $ 52,244 (4) Derivatives not designated as hedges Customer Related Positions: Loan level derivatives 99,416 (3) 123,372 (3) 99,551 (4) 123,374 (4) Foreign exchange contracts 2,220 4,352 2,183 4,278 Risk participation agreements 200 161 44 15 Mortgage Derivatives Interest rate lock commitments 168 43 — — Forward sale loan commitments 17 30 — — Total derivatives not designated as hedges 102,021 127,958 101,778 127,667 Total 103,948 127,958 133,868 179,911 Netting Adjustments (5) (48,253) (57,784) 25,360 33,245 Net Derivatives on the Balance Sheet 55,695 70,174 108,508 146,666 Financial instruments (6) 12,018 20,019 12,018 20,019 Cash collateral pledged (received) (17,076) (17,720) — — Net Derivative Amounts $ 26,601 $ 32,435 $ 96,490 $ 126,647 (1) All asset derivatives are located in other assets on the balance sheet. (2) All liability derivatives are located in other liabilities on the balance sheet. (3) As of December 31, 2023, approximately $316,000 and $3.0 million of accrued interest receivable is included in the fair value of interest rate and loan level derivative assets, respectively. Accrued interest receivable of approximately $2.2 million is included in the fair value of loan level derivative assets at December 31, 2022. (4) Approximately $1.9 million and $3.0 million of accrued interest payable is included in the fair value of interest rate and loan level derivative liabilities, respectively, at December 31, 2023, in comparison to accrued interest payable of approximately $1.3 million and $2.2 million, respectively, at December 31, 2022. (5) Netting adjustments represent the amounts recorded to convert derivative assets and liabilities cleared through CME from a gross basis to a net basis, inclusive of the variation margin payments, in accordance with applicable accounting guidance. (6) Reflects offsetting derivative positions with the same counterparty that are not netted on the balance sheet. The table below presents the effect of the Company’s derivative financial instruments included in OCI and current earnings for the periods indicated: Years Ended December 31 2023 2022 2021 (Dollars in thousands) Derivatives designated as hedges Gain (loss) in OCI on derivatives (effective portion), net of tax $ 16,055 $ (50,767) $ (19,139) (Loss) gain reclassified from OCI into interest income or interest expense (effective portion) $ (27,414) $ 5,054 $ 18,691 Derivatives not designated as hedges Changes in fair value of customer related positions Other income $ 517 $ 260 $ 217 Other expenses (679) (268) (405) Changes in fair value of mortgage derivatives Mortgage banking income 112 (679) (4,725) Total $ (50) $ (687) $ (4,913) The Company's derivative agreements with institutional counterparties contain various credit-risk related contingent provisions, such as requiring the Company to maintain a well-capitalized capital position. If the Company fails to meet these conditions, the counterparties could request the Company make immediate payment or demand that the Company provide immediate and ongoing full collateralization on derivative positions in net liability positions. All derivative instruments with credit-risk related contingent features were in a net asset position at December 31, 2023 and December 31, 2022.

INCOME TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2023
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The provision for income taxes is comprised of the following components: Years Ended December 31 2023 2022 2021 (Dollars in thousands) Current expense Federal $ 51,771 $ 60,216 $ 21,539 State 21,123 24,979 11,054 Total current expense 72,894 85,195 32,593 Deferred expense (benefit) Federal 1,336 (970) 3,032 State 1,402 (284) 58 Total deferred expense (benefit) 2,738 (1,254) 3,090 Total expense $ 75,632 $ 83,941 $ 35,683 The difference between the statutory federal income tax rate and the effective income tax rate reported for the last three years is detailed below: Years Ended December 31 2023 2022 2021 (Dollars in thousands) Computed statutory federal income tax provision $ 66,178 21.00 % $ 73,028 21.00 % $ 32,902 21.00 % State taxes, net of federal tax benefit 17,992 5.71 % 19,728 5.67 % 8,754 5.59 % Low Income Housing Project Investments (3,740) (1.19) % (3,364) (0.97) % (2,308) (1.47) % Nontaxable interest, net (3,508) (1.11) % (3,191) (0.92) % (1,022) (0.65) % Increase in cash surrender value of life insurance (2,133) (0.68) % (1,885) (0.54) % (1,405) (0.90) % Increase (decrease) in uncertain positions (655) (0.21) % (1,035) (0.30) % 50 0.03 % Revaluation of net deferred tax assets 255 0.08 % — — % — — % Stock-based compensation (127) (0.04) % (202) (0.06) % (372) (0.24) % Change in valuation allowance 109 0.03 % 52 0.01 % 26 0.02 % Other tax credits (76) (0.02) % — — % — — % Merger and other related costs (non-deductible) — — % — — % 630 0.40 % Other, net 1,337 0.43 % 810 0.25 % (1,572) (1.00) % Total expense $ 75,632 24.00 % $ 83,941 24.14 % $ 35,683 22.78 % The tax-effected components of the net deferred tax asset at December 31 of the years presented were as follows: 2023 2022 (Dollars in thousands) Deferred tax assets Accrued expenses not deducted for tax purposes $ 14,646 $ 16,162 Allowance for credit losses 38,774 42,748 Derivatives fair value adjustment 7,825 14,328 Employee and director equity compensation 1,660 1,388 Foreign Tax Credit Carryforward 89 89 Loan basis difference fair value adjustment 1,811 2,273 Net operating loss carry-forward 633 606 Net unrealized loss on securities available for sale 29,536 38,968 Operating lease liability 15,387 17,069 Other 587 791 Gross deferred tax assets $ 110,948 $ 134,422 Valuation allowance (467) (358) Total deferred tax assets net of valuation allowance $ 110,481 $ 134,064 Deferred tax liabilities Core deposit and other intangibles $ 2,865 $ 4,137 Deferred loan fees, net 8,160 8,281 Derivatives fair value adjustment — — Fixed assets 16,606 18,132 Goodwill 11,291 11,432 Prepaid pension 3,482 3,469 Right of use asset 14,781 16,565 Other 1,884 2,112 Gross deferred tax liabilities $ 59,069 $ 64,128 Total net deferred tax asset $ 51,412 $ 69,936 Deferred tax assets are to be reduced by a valuation allowance if, based on the weight of available evidence, it is more likely than not that some portion or all of the deferred tax assets will not be realized. The realization of the tax benefit depends upon the existence of sufficient taxable income in future periods. Uncertainty in Income Taxes The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction as well as in various states. The Company is subject to U.S. federal, state and local income tax examinations by tax authorities for the 2020 through 2022 tax years including any related income tax filings from its recent acquisitions. The Company believes that its income tax returns have been filed based upon applicable statutes, regulations and case law in effect at the time of filing, however, the Internal Revenue Service ("IRS") and /or state jurisdictions could disagree with the Company's interpretation upon examination. The Company accounts for uncertainties in income taxes by providing a tax reserve for certain positions. The following is a reconciliation of the beginning and ending amount of unrecognized tax benefits: (Dollars in thousands) Balance at December 31, 2020 $ 474 Reduction of tax positions for prior years $ (29) Increase for current year tax positions $ 2,433 Balance at December 31, 2021 $ 2,878 Reduction of tax positions for prior years (1,047) Increase for prior year tax position 128 Increase for current year tax positions 761 Balance at December 31, 2022 2,720 Reduction of tax positions for prior years (959) Balance at December 31, 2023 $ 1,761

LOW INCOME HOUSING PROJECT INVE

LOW INCOME HOUSING PROJECT INVESTMENTS Low Income Housing Project Investments	12 Months Ended
	Dec. 31, 2023
Low Income Housing Project Investments [Abstract]
Investments in Low Income Housing Projects [Text Block]	LOW INCOME HOUSING PROJECT INVESTMENTS The Company has invested in low income housing projects that generate Low Income Housing Tax Credits ("LIHTC") which provide the Company with tax credits and operating loss tax benefits over a minimum of 15 years. None of the original investment is expected to be repaid. The following table presents certain information related to the Company's investments in low income housing projects as of December 31 of the years presented: 2023 2022 2021 (Dollars in thousands) Original investment value $ 229,015 $ 197,124 $ 179,481 Current recorded investment 156,984 139,454 135,497 Unfunded liability obligation 58,731 57,913 73,336 Tax credits and benefits earned during the year 18,101 17,011 14,198 Amortization of investments during the year 14,360 13,647 11,892 Net income tax benefit recognized during the year 3,740 3,364 2,306

EMPLOYEE BENEFIT PLANS

EMPLOYEE BENEFIT PLANS	12 Months Ended
	Dec. 31, 2023
Retirement Benefits [Abstract]
EMPLOYEE BENEFIT PLANS	EMPLOYEE BENEFIT PLANS Pension Plans The Company maintains a multiemployer defined benefit pension plan (the "Pension Plan") administered by Pentegra Retirement Services (the "Fund" or "Pentegra Defined Benefit Plan for Financial Institutions"). The Fund does not segregate the assets or liabilities of all participating employers and accordingly, disclosure of plan assets, accumulated vested and nonvested benefits is not possible. Effective July 1, 2006, the Company froze the defined benefit plan by eliminating all future benefit accruals. In conjunction with the acquisition of Peoples Federal Bancshares, Inc., the parent of Peoples Federal Savings Bank ("Peoples") in 2015, the Company acquired the Peoples Federal Defined Benefit Pension Plan ("Peoples Plan"). The Peoples Plan was frozen at the date of acquisition and will be maintained in the same manner as the Pension Plan. The Peoples Plan is also administered by Pentegra Retirement Services under the same Fund as the Pension Plan. The Company’s participation in the Pension Plan and the Peoples Plan (the "Pension Plans") for the annual period ended December 31, 2023, is outlined in the table below. The "EIN/Pension Plan Number" column provides the Employer Identification Number ("EIN") and the three-digit plan number. The funding status of the Pension Plans is determined on the basis of the financial statements provided by the Fund using total plan assets and accumulated benefit obligation. The "FIP/RP Status Pending/Implemented" column indicates plans for which a financial improvement plan ("FIP") or a rehabilitation plan ("RP") is either pending or has been implemented. The "Expiration Date of Collective-Bargaining Agreement" column lists the expiration dates of any collective-bargaining agreement(s) to which the Pension Plans are subject. Financial information for the Fund is made available through the public Form 5500 which is available by April 15 th of the year following the plan year end. Funding Status FIP/RP Status Surcharge Expiration Minimum EIN/Pension 2023 2022 Pentegra defined benefit plan for financial institutions 13-5645888/333 At least 80 percent At least 80 percent No No N/A $ — Contributions to the Fund are based on each individual employer’s experience. The Company bears the market risk relating to the Pension Plan and will continue to fund the Pension Plan as required. The Pension Plan year is July 1 through June 30. The Company’s total contributions to the Pension Plan did not represent more than 5% of the total contributions to the Pension Plan as indicated in the Pension Plan’s most recently available annual report dated June 30, 2023. The comparability of employer contributions is impacted by asset performance, discount rates and the reduction in the number of covered employees year over year. The Company’s contributions to the Pension Plans were as follows for the periods indicated: Required Contributions - Plan Year Allocation Contribution 2023-2024 2022-2023 2021-2022 (Dollars in thousands) 2023 $ 476 $ 476 $ — $ — 2022 $ 499 $ — $ 499 $ — 2021 $ 626 $ — $ — $ 626 In conjunction with the acquisition of Blue Hills Bancorp, Inc., parent of Blue Hills Bank (collectively, "BHB") in 2019, the Company acquired the Savings Banks Employees Retirement Association Pension Plan as adopted by BHB (the "BHB Plan"). The BHB Plan is administered by Savings Banks Employees Retirement Association ("SBERA") and was frozen on October 31, 2014. Accumulated benefits for participants earned through the end of October 2014 remain secured by the BHB Plan assets as of December 31, 2023 and 2022. Information pertaining to the BHB Plan is as follows: Years Ended December 31 2023 2022 2021 (Dollars in thousands) Change in plan assets: Fair value of plan assets at beginning of year $ 9,889 $ 14,099 $ 12,225 Actual return on plan assets 509 (2,126) 1,480 Employer contribution — — 950 Benefits paid (766) (2,084) (556) Fair value of plan assets at end of year $ 9,632 $ 9,889 $ 14,099 Change in benefit obligation: Benefit obligation at beginning of year 8,716 13,939 15,052 Interest cost 420 366 344 Actuarial loss (gain) 15 (3,505) (901) Benefits paid (766) (2,084) (556) Benefit obligation at end of year $ 8,385 $ 8,716 $ 13,939 Funded status at end of year $ 1,247 $ 1,173 $ 160 At December 31, 2023 and 2022, the discount rate used to determine the benefit obligation was 4.77% and 4.97%, respectively. The components of net period pension expense (benefit) are as follows: Years Ended December 31 2023 2022 2021 (Dollars in thousands) Interest cost $ 420 $ 366 $ 344 Expected return on plan assets (144) (966) (891) Amortization of net actuarial (gain) loss (17) 28 208 Settlement gain (25) (31) — Net period pension expense (benefit) $ 234 $ (603) $ (339) The key assumptions used to determine net periodic pension expense (benefit) are as follows: Years Ended December 31 2023 2022 2021 Discount rate 4.97 % 2.68 % 2.35 % Expected long-term rate of return on plan assets 1.50 % 7.00 % 7.00 % Assumptions with respect to the expected long-term rate of return are based on prevailing yields on high-quality, fixed-income investments increased by a premium for equity return expectations. During the year ended December 31, 2022, the Company's Board of Directors voted to terminate the BHB Plan. As a result, the assets of the BHB plan were transferred to a money market account until the termination is approved by all regulatory bodies, which resulted in a lower long term rate of return on plan assets. Presented in the table below are the estimated future benefit payments for the BHB Plan. These payments were calculated prior to the approval of the BHB Plan's termination. Amount (Dollars in thousands) 2024 $ 509 2025 $ 461 2026 $ 462 2027 $ 490 2028 $ 483 2029-2033 $ 2,600 The Company’s total defined benefit plan expense was $487,000, $562,000, and $1.2 million, for the years ending December 31, 2023, 2022, and 2021, respectively. Supplemental Executive Retirement Plans The Bank maintains frozen defined benefit supplemental executive retirement plans ("SERP") for certain highly compensated employees designed to offset the impact of regulatory limits on benefits under qualified pension plans. The Bank also maintains defined benefit SERPs acquired from previous acquisitions. The Bank has established and funded rabbi trusts to accumulate funds in order to satisfy the contractual liability of these supplemental retirement plan benefits. These agreements provide for the Bank to pay all benefits from its general assets, and the establishment of these trust funds does not reduce nor otherwise affect the Bank’s continuing liability to pay benefits from such assets except that the Bank’s liability shall be offset by actual benefit payments made from the trusts. The related trust assets included in the Company's available for sale securities portfolio totaled $20.0 million and $18.6 million at December 31, 2023 and 2022, respectively. The following table shows the defined benefit supplemental retirement expense, and the contributions paid to the plans which were used only to pay the current year benefits for the years indicated: 2023 2022 2021 (Dollars in thousands) Retirement expense $ 703 $ 1,681 $ 2,275 Benefits paid $ 450 $ 475 $ 475 Expected future benefit payments for the defined benefit supplemental executive retirement plans are presented below: Defined Benefit Supplemental Executive (Dollars in thousands) 2024 $ 1,277 2025 $ 1,094 2026 $ 1,091 2027 $ 1,060 2028 $ 1,047 2029-2033 $ 5,685 The measurement date used to determine the defined benefit supplemental executive retirement plans' benefits is December 31 for each of the years reported. The following table illustrates the status of the defined benefit supplemental executive retirement plans at December 31 for the years presented: Defined Benefit Supplemental Executive 2023 2022 2021 (Dollars in thousands) Change in accumulated benefit obligation Benefit obligation at beginning of year $ 15,711 $ 19,498 $ 20,752 Service cost 380 561 574 Interest cost 761 492 424 Actuarial gain (8) (4,365) (1,777) Benefits paid (450) (475) (475) Benefit obligation at end of year $ 16,394 $ 15,711 $ 19,498 Change in plan assets Fair value of plan assets at beginning of year $ — $ — $ — Employer contribution 450 475 475 Benefits paid (450) (475) (475) Fair value of plan assets at end of year $ — $ — $ — Funded status at end of year $ (16,394) $ (15,711) $ (19,498) Assets — — — Liabilities (16,394) (15,711) (19,498) Funded status at end of year $ (16,394) $ (15,711) $ (19,498) Amounts recognized in accumulated other comprehensive income ("AOCI") Net (gain) loss $ (1,518) $ (1,970) $ 3,002 Prior service cost — 22 43 Amounts recognized in AOCI $ (1,518) $ (1,948) $ 3,045 Information for plans with an accumulated benefit obligation in excess of plan assets Projected benefit obligation $ 16,394 $ 15,711 $ 19,498 Accumulated benefit obligation $ 16,394 $ 15,711 $ 19,498 Net periodic benefit cost Service cost $ 380 $ 561 $ 574 Interest cost 761 492 424 Amortization of prior service cost 22 22 174 Recognized net actuarial (gain) loss (460) 606 1,103 Net periodic benefit cost $ 703 $ 1,681 $ 2,275 Discount rate used for benefit obligation 4.62% - 4.75% 4.67% - 4.93% 1.28% - 2.57% Discount rate used for net periodic benefit cost 4.67% - 4.93% 1.28% - 2.57% 0.43% - 2.18% Rate of compensation increase n/a n/a n/a Other Employee Benefits The Bank may choose to create an incentive compensation plan for senior management and other officers to participate in at varying levels. In addition, the Bank may also pay a discretionary bonus to senior management, officers, and/or non-officers of the Bank. The expense for these incentive plans amounted to $18.6 million, $24.3 million and $21.2 million in 2023, 2022 and 2021, respectively. The Bank has an Employee Savings Plan that qualifies as a deferred salary arrangement under Section 401(k) of the Internal Revenue Code. Under the Employee Savings Plan, participating employees may defer a portion of their earnings, not to exceed the Internal Revenue Service annual contribution limits. The Bank matches 25% of each employee’s contributions up to the first 6% of the employee’s eligible earnings. The 401(k) Plan incorporates an Employee Stock Ownership Plan for contributions invested in the Company’s common stock. The Company also provides three defined contributions under this Plan, providing the employees are deemed eligible. To be eligible for these contributions, an employee must complete one year and 1,000 hours of service. The defined contributions are made up of a safe harbor contribution, in which eligible employees receive a 3% cash contribution of eligible earnings to the social security limit, a discretionary contribution in which eligible employees receive a 2% cash contribution of eligible earnings up to the social security limit and a 5% cash contribution of eligible earnings over the social security limit up to the maximum amount permitted by law. Benefits contributed to employees under this defined contribution plan vest immediately. The defined contribution plan expense was $9.3 million, $8.7 million and $7.8 million for the years ended December 2023, 2022 and 2021, respectively. The Company has a non-qualified deferred compensation plan which allows for deferrals of base salary and incentive payments until an elected distribution date in the future. This deferred compensation plan is available to certain highly compensated employees. Deferrals are invested at the election of the participant into one of the actively managed funds made available to the participant through the Company's Investment Management Group. The funds are held in a rabbi trust until the elected date of distribution. The Company has a non-qualified 401(k) Restoration Plan ("Restoration Plan") for certain executive officers. The Restoration Plan is intended to contribute to each participant the amount of matching and discretionary contributions which would have been made to the existing Rockland Trust 401(k) plan on the participant's behalf, but were prohibited due to Internal Revenue Code limitations. Deferrals are invested at the election of the participant into one of the actively managed funds made available to the participant through the Company's Investment Management Group or in the Company's stock. These funds are held in a rabbi trust until the elected date of distribution. The Company recognized expense of $524,000, $505,000 and $303,000 related to this plan for services performed for the years ended December 31, 2023, 2022 and 2021, respectively. Also as part of the Peoples acquisition in 2015, the Company assumed various Salary Continuation Agreements with certain current and former senior executives. The agreements require the payment of specified benefits upon retirement over periods of ten or twenty years as described in each agreement. Expense related to the Salary Continuation Agreements was $217,000, $213,000 and $210,000 for the years ended December 31, 2023, 2022 and 2021, respectively. Director Benefits

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS	12 Months Ended
	Dec. 31, 2023
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	FAIR VALUE MEASUREMENTS Fair value is a market-based measure considered from the perspective of a market participant rather than an entity-specific measure. Therefore, even when market assumptions are not readily available, the assumptions applied by the Company when determining fair value reflect those that the Company determines market participants would use to price the asset or liability at the measurement date. If there has been a significant decrease in the volume and level of activity for the asset or liability, regardless of the valuation technique(s) used, the objective of a fair value measurement remains the same. Fair value is the price that would be received if the asset were to be sold or that would be paid if the liability were to be transferred in an orderly market transaction (that is, not a forced liquidation or distressed sale) between market participants at the measurement date under current market conditions. When determining fair value, the Company considers pricing information and other inputs that are current as of the measurement date. In periods of market dislocation, the observability of prices and other inputs may be reduced for certain instruments, or not available at all. The unavailability or reduced availability of pricing or other input information could cause an instrument to be reclassified from one level to another. The Fair Value Measurements and Disclosures Topic of the FASB ASC defines fair value and establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy under the Fair Value Measurements and Disclosures Topic of the FASB ASC are described below: Level 1 – Inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. Level 2 – Valuations based on quoted prices in markets that are not active or for which all significant inputs are observable, either directly or indirectly. Level 3 – Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable. To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for instruments categorized in Level 3. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Valuation Techniques There were no changes in the valuation techniques used during the year ended December 31, 2023. Securities Trading and Equity Securities These equity securities are valued based on market quoted prices. These securities are categorized in Level 1 as they are actively traded and no valuation adjustments have been applied. U.S. Government Agency and U.S. Treasury Securities Fair value is estimated using either multi-dimensional spread tables or benchmarks. The inputs used include benchmark yields, reported trades, and broker/dealer quotes. These securities are classified as Level 2. Agency Mortgage-Backed Securities Fair value is estimated using either a matrix or benchmarks. The inputs used include benchmark yields, reported trades, broker/dealer quotes, and issuer spreads. These securities are categorized as Level 2. Agency Collateralized Mortgage Obligations and Small Business Administration Pooled Securities The valuation model for these securities is volatility-driven and ratings based, and uses multi-dimensional spread tables. The inputs used include benchmark yields, reported trades, new issue data, broker dealer quotes, and collateral performance. If there is at least one significant model assumption or input that is not observable, these securities are categorized as Level 3 within the fair value hierarchy; otherwise, they are classified as Level 2. State, County, and Municipal Securities The fair value is estimated using a valuation matrix with inputs including bond interest rate tables, recent transaction, and yield relationships. These securities are categorized as Level 2. Single and Pooled Issuer Trust Preferred Securities The fair value of trust preferred securities, including pooled and single issuer preferred securities, is estimated using external pricing models, discounted cash flow methodologies or similar techniques. The inputs used in these valuations include benchmark yields, reported trades, new issue data, broker dealer quotes, and collateral performance. If there is at least one significant model assumption or input that is not observable, these securities are classified as Level 3 within the fair value hierarchy; otherwise, they are classified as Level 2. Loans Held for Sale The Company has elected the fair value option to account for originated closed loans intended for sale. The fair value is measured on an individual loan basis using quoted market prices and when not available, comparable market value or discounted cash flow analysis may be utilized. These assets are typically classified as Level 2. Derivative Instruments Derivatives The valuation of these instruments is determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities. The Company incorporates credit valuation adjustments to appropriately reflect 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. Additionally, in conjunction with fair value measurement guidance, the Company has made an accounting policy election to measure the credit risk of its derivative financial instruments that are subject to master netting agreements on a net basis by counterparty portfolio. 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 interest rate derivatives and risk participation agreements may also utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by the Company and its counterparties. However, as of December 31, 2023 and 2022, 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 properly classified as Level 2. Mortgage Derivatives The fair value of mortgage derivatives is determined based on current market prices for similar assets in the secondary market and, therefore, classified as Level 2 within the fair value hierarchy. Individually Assessed Collateral Dependent Loans In accordance with the CECL standard, expected credit losses on individually assessed loans deemed to be collateral dependent are valued based upon the lower of amortized cost or fair value of the underlying collateral less costs to sell. The inputs used in the appraisals of the collateral are not always observable, and in such cases the loans may be classified as Level 3 within the fair value hierarchy; otherwise, they are classified as Level 2. Other Real Estate Owned and Other Foreclosed Assets Other Real Estate Owned ("OREO") and Other Foreclosed Assets, when applicable, are valued at the lower of cost or fair value of the property, less estimated costs to sell. The fair values are generally estimated based upon recent appraisal values of the property less costs to sell the property. Certain inputs used in appraisals are not always observable, and therefore OREO and Other Foreclosed Assets may be classified as Level 3 within the fair value hierarchy. Goodwill and Other Intangible Assets Goodwill and identified intangible assets are subject to impairment testing. The Company conducts an annual impairment test of goodwill in the third quarter of each year, or more frequently if necessary. Other intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. To estimate the fair value of goodwill and, if necessary, other intangible assets, the Company utilizes both a comparable analysis of relevant price multiples in recent market transactions and a discounted cash flow analysis. Both valuation models require a significant degree of management judgment. In the event the fair value as determined by the valuation model is less than the carrying value, the intangibles may be impaired. If the impairment testing resulted in impairment, the Company would classify the impaired goodwill and other intangible assets subjected to nonrecurring fair value adjustments as Level 3. Assets and liabilities measured at fair value on a recurring and nonrecurring basis were as follows at the dates indicated: Fair Value Measurements at Reporting Date Using Balance Quoted Significant Other Significant December 31, 2023 (Dollars in thousands) Recurring fair value measurements Assets Trading securities $ 4,987 $ 4,987 $ — $ — Equity securities 22,510 22,510 — — Securities available for sale U.S. government agency securities 207,138 — 207,138 — U.S. treasury securities 769,102 — 769,102 — Agency mortgage-backed securities 277,047 — 277,047 — Agency collateralized mortgage obligations 33,189 — 33,189 — State, county, and municipal securities 190 — 190 — Pooled trust preferred securities issued by banks and insurers 1,018 — 1,018 — Small business administration pooled securities 46,572 — 46,572 — Loans held for sale 6,368 — 6,368 — Derivative instruments 103,948 — 103,948 — Liabilities Derivative instruments 133,868 — 133,868 — Total recurring fair value measurements, net $ 1,338,201 $ 27,497 $ 1,310,704 $ — Nonrecurring fair value measurements Assets Individually assessed collateral dependent loans (1) $ 28,881 $ — $ — $ 28,881 Total nonrecurring fair value measurements $ 28,881 $ — $ — $ 28,881 Fair Value Measurements at Reporting Date Using Balance Quoted Significant Other Significant December 31, 2022 (Dollars in thousands) Recurring fair value measurements Assets Trading securities $ 3,888 $ 3,888 $ — $ — Equity securities 21,119 21,119 — — Securities available for sale U.S. government agency securities 202,300 — 202,300 — U.S. treasury securities 791,341 — 791,341 — Agency mortgage-backed securities 313,688 — 313,688 — Agency collateralized mortgage obligations 38,843 — 38,843 — State, county, and municipal securities 191 — 191 — Pooled trust preferred securities issued by banks and insurers 1,034 — 1,034 — Small business administration pooled securities 51,757 — 51,757 — Loans held for sale 2,803 — 2,803 — Derivative instruments 127,958 — 127,958 — Liabilities Derivative instruments 179,911 — 179,911 — Total recurring fair value measurements, net $ 1,375,011 $ 25,007 $ 1,350,004 $ — Nonrecurring fair value measurements Assets Individually assessed collateral dependent loans (1) $ 16,092 $ — $ — $ 16,092 Total nonrecurring fair value measurements $ 16,092 $ — $ — $ 16,092 (1) The carrying value of individually assessed collateral dependent loans is based on the lower of amortized cost or fair value of the underlying collateral less costs to sell. The fair value of the underlying collateral is generally determined through independent appraisals, which generally include various Level 3 inputs which are not identifiable. Appraisals may be adjusted by management for qualitative factors such as economic factors and estimated liquidation expenses. The range of these possible adjustments may vary. The estimated fair values and related carrying amounts for assets and liabilities for which fair value is only disclosed are shown below at the dates indicated: Fair Value Measurements at Reporting Date Using Carrying Value Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) December 31, 2023 (Dollars in thousands) Financial assets Securities held to maturity (a) U.S. government agency securities $ 29,521 $ 28,408 $ — $ 28,408 $ — U.S. treasury securities 100,712 91,535 — 91,535 — Agency mortgage-backed securities 829,431 763,728 — 763,728 — Agency collateralized mortgage obligations 477,517 407,911 — 407,911 — Single issuer trust preferred securities issued by banks 1,500 1,373 — 1,373 — Small business administration pooled securities 130,426 124,653 — 124,653 — Loans, net of allowance for credit losses (b) 14,106,967 13,079,368 — — 13,079,368 Federal Home Loan Bank stock (c) 43,557 43,557 — 43,557 — Cash surrender value of life insurance policies (d) 297,387 297,387 — 297,387 — Financial liabilities Deposit liabilities, other than time deposits (e) $ 12,684,068 $ 12,684,068 $ — $ 12,684,068 $ — Time certificates of deposits (f) 2,181,479 2,166,573 — 2,166,573 — Federal Home Loan Bank borrowings (f) 1,105,541 1,103,845 — 1,103,845 — Junior subordinated debentures (g) 62,858 58,911 — 58,911 — Subordinated debentures (f) 49,980 49,613 — — 49,613 Fair Value Measurements at Reporting Date Using Carrying Value Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Significant December 31, 2022 Financial assets (Dollars in thousands) Securities held to maturity (a) U.S. government agency securities $ 31,258 $ 29,036 $ — $ 29,036 $ — U.S. treasury securities 100,634 88,879 $ — 88,879 — Agency mortgage-backed securities 898,927 815,952 — 815,952 — Agency collateralized mortgage obligations 535,971 458,417 — 458,417 — Single issuer trust preferred securities issued by banks 1,500 1,508 — 1,508 — Small business administration pooled securities 136,830 130,918 — 130,918 — Loans, net of allowance for loan losses (b) 13,760,164 13,260,873 — — 13,260,873 Federal Home Loan Bank stock (c) 5,218 5,218 — 5,218 — Cash surrender value of life insurance policies (d) 293,323 293,323 — 293,323 — Financial liabilities Deposit liabilities, other than time deposits (e) $ 14,683,266 $ 14,683,266 $ — $ 14,683,266 $ — Time certificates of deposits (f) 1,195,741 1,164,892 — 1,164,892 — Federal Home Loan Bank borrowings (f) 637 563 — 563 — Junior subordinated debentures (g) 62,855 60,002 — 60,002 — Subordinated debentures (f) 49,885 45,891 — — 45,891 (a) The fair values presented are based on quoted market prices, where available. If quoted market prices are not available, fair values are based on quoted market prices of comparable instruments and/or discounted cash flow analysis. (b) Fair value of loans is measured using the exit price valuation method, determined primarily by discounting the future cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities or cash flows, while incorporating liquidity and credit assumptions. Additionally, this amount excludes individually assessed collateral dependent loans, which are deemed to be marked to fair value on a nonrecurring basis. (c) Federal Home Loan Bank stock has no quoted market value and is carried at cost, therefore the carrying amount approximates fair value. (d) Cash surrender value of life insurance is recorded at its cash surrender value (or the amount that can be realized upon surrender of the policy), therefore, carrying amount approximates fair value. (e) Fair value of demand deposits, savings and interest checking accounts and money market deposits is the amount payable on demand at the reporting date. (f) Fair value was determined by discounting anticipated future cash payments using rates currently available for instruments with similar remaining maturities. (g) Fair value was determined based upon market prices of securities with similar terms and maturities. This summary excludes certain financial assets and liabilities for which the carrying value approximates fair value. For financial assets, these may include cash and due from banks, federal funds sold and short-term investments. For financial liabilities, these may include federal funds purchased. These instruments would all be considered to be classified as Level 1 within the fair value hierarchy. Also excluded from the summary are financial instruments measured at fair value on a recurring and nonrecurring basis, as previously described. The Company considers its current use of financial instruments to be the highest and best use of the instruments.

REVENUE RECOGNITION (Notes)

REVENUE RECOGNITION (Notes)	12 Months Ended
	Dec. 31, 2023
Revenue Recognition [Abstract]
Revenue from Contract with Customer [Text Block]	REVENUE RECOGNITION A portion of the Company's noninterest income is derived from contracts with customers, and as such, the revenue recognized depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The Company accounts for such revenues in accordance with ASC 606 - Revenue from Contracts with Customers and considers the terms of the contract and all relevant facts and circumstances when applying this guidance. To ensure its alignment with this core principle, the Company measures revenue and the timing of recognition by applying the following five steps: 1. Identify the contract(s) with customers 2. Identify the performance obligations 3. Determine the transaction price 4. Allocate the transaction price to the performance obligations 5. Recognize revenue when (or as) the entity satisfies a performance obligation The Company has disaggregated its revenue from contracts with customers into categories that depict how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors. The following table presents the revenue streams that the Company has disaggregated for the periods indicated: Years Ended December 31 2023 2022 2021 (Dollars in thousands) Deposit account fees (inclusive of cash management fees) $ 23,486 $ 23,370 $ 16,745 Interchange fees 11,865 10,881 8,862 ATM fees 4,243 3,866 2,989 Investment management - wealth management and advisory services 34,588 32,774 31,617 Investment management - retail investments and insurance revenue 5,603 4,058 3,691 Payment processing income 1,675 1,534 1,362 Credit card income 2,119 1,833 1,231 Other noninterest income 5,684 6,099 5,312 Total noninterest income in-scope of ASC 606 89,263 84,415 71,809 Total noninterest income out-of-scope of ASC 606 35,346 30,252 34,041 Total noninterest income $ 124,609 $ 114,667 $ 105,850 In each of the revenue streams identified above, there were no significant judgments made in determining or allocating the transaction price, as the consideration and service requirements are generally explicitly identified in the associated contracts. Additional information related to each of the revenue streams is further noted below. Deposit Account Fees The Company offers various deposit account products to its customers governed by specific deposit agreements applicable to either personal customers or business customers. These agreements identify the general conditions and obligations of both parties, and include standard information regarding deposit account related fees. Deposit account services include providing access to deposit accounts as well as access to the various deposit transactional services of the Company. These transactional services are primarily those that are identified in the standard fee schedule, and include, but are not limited to, services such as overdraft protection, wire transfer, and check collection. Revenue is recognized in conjunction with the various services being provided. For example, the Company may assess monthly fixed service fees associated with the customer having access to the deposit account, which can vary depending on the account type and daily account balance. In addition, the Company may also assess separate fixed fees associated with and at the time specific transactions are entered into by the customer. As such, the Company considers its performance obligations to be met concurrently with providing the account access or completing the requested deposit transaction. Cash Management Cash management services are a subset of the Deposit account fees revenue stream. These services primarily include ACH transaction processing, positive pay and remote deposit services. These services are also governed by separate agreements entered into with the customer. The fee arrangement for these services is structured to assess fees under one of two scenarios, either a per transaction fee arrangement or an earnings credit analysis arrangement. Under the per transaction fee arrangement, fixed fees are assessed concurrently with customers executing the transactions, and as such, the Company considers its performance obligations to be met concurrently with completing the requested transaction. Under the earnings credit analysis arrangement, the Company provides a monthly earnings credit to the customer that is negotiated and determined based on various factors. The credit is then available to absorb the per transaction fees that are assessed on the customer's deposit account activity for the month. Any amount of the transactional fees in excess of the earnings credit is recognized as revenue in that month. Interchange Fees The Company earns interchange revenue from its issuance of credit and debit cards granted through its membership in various card payment networks. The Company provides credit cards and debit cards to its customers which are authorized and settled through these payment networks, and in exchange, the Company earns revenue as determined by each payment network's interchange program. The revenue is recognized concurrently with the settlement of card transactions within each network. ATM Fees The Company deploys automated teller machines (ATMs) as part of its overall branch network. Certain transactions performed at the ATMs require customers to acknowledge and pay a fee for the requested service. Certain ATM fees are disclosed in the deposit account agreement fee schedules, whereas those assessed to non-Rockland Trust deposit holders are solely determined during the transaction at the machine. The ATM fee is a fixed dollar per transaction amount, and as such, is recognized concurrently with the overall daily processing and settlement of the ATM activity. Investment Management - Wealth Management and Advisory Services The Company offers investment management and trust services to individuals, institutions, small businesses and charitable institutions. Each investment management product is governed by its own contract along with a separate identifiable fee schedule unique to that product. The Company also offers additional services, such as estate settlement, financial planning, tax services and other special services quoted at the client's request. Asset management and/or custody fees are based upon a percentage of the monthly valuation of the principal assets in the customer's account, whereas fees for additional or special services are fixed in nature and are charged as services are rendered. As the fees are dependent on assets under management, which are susceptible to market factors outside of the Company's control, this variable consideration is constrained and therefore no revenue is estimated at contract initiation. As such, all revenue is recognized in correlation to the monthly management fee determinations or as transactional services are provided. Due to the fact that payments are primarily made subsequent to the valuation period, the Company records a receivable for revenue earned but not received. The following table provides the amount of investment management revenue earned but not received as of the dates indicated: December 31, 2023 December 31, 2022 (Dollars in thousands) Receivables, included in other assets $ 5,509 $ 5,261 Investment Management - Retail Investments and Insurance Revenue The Company offers the sale of mutual fund shares, unit investment trust shares, third party model portfolios, general securities, fixed and variable annuities and life insurance products through registered representatives who are both employed by the Company and licensed and contracted with various Broker General Agents to offer these products to the Company’s customer base. As such, the Company performs these services as an agent and earns a fixed commission on the sales of these products and services. To a lesser degree, production bonus commissions can also be earned based upon the Company meeting certain volume thresholds. In general, the Company recognizes commission revenue at the point of sale, and for certain insurance products, may also earn and recognize annual residual commissions commensurate with annual premiums being paid. Payment Processing Income The Company refers customers to third party payment processing partners in exchange for commission and fee income. The income earned is comprised of multiple components, including a fixed referral fee per each referred customer, a rebate amount determined primarily as a percentage of net revenue earned by the third party from services provided to each referred customer, and overall production bonus commissions if certain new account production thresholds are met. Payment processing income is recognized in conjunction with either completing the referral to earn the fixed fee amount or as the merchant activity is processed to derive the Company's rebate and/or production bonus amounts. Credit Card Income The Company provides consumer and business credit card solutions to its customers by soliciting new accounts on behalf of a third party credit card provider in exchange for a fee. The income earned is comprised of new account incentive payments as well as a percentage of interchange income earned by the third party provider offering the consumer and business purpose revolving credit accounts. The credit card income is recognized in conjunction with the establishment of each new credit card member or as the interchange is earned by the third party in connection with net purchase transactions made by the credit card member. Other Noninterest Income The Company earns various types of other noninterest income that fall within the scope of the new revenue recognition rules, and have been aggregated into one general revenue stream in the table noted above. This amount includes, but is not limited to, the following types of revenue with customers: Safe Deposit Rent The Company rents out the use of safe deposit boxes to its customers, which can be accessed when the bank is open for business. The safe deposit box rental fee is paid upfront and is recognized as revenue ratably over the annual term of the contract. 1031 Exchange Fee Revenue The Company provides like-kind exchange services pursuant to Section 1031 of the Internal Revenue Code. Fee income is recognized in conjunction with completing the exchange transactions. The like-kind exchange services provided in connection with this revenue stream ceased during 2023. Foreign Currency The Company earns fee income associated with various transactions related to foreign currency product offerings, including foreign currency bank notes and drafts and foreign currency wires. The majority of this income is derived from commissions earned related to customers executing the above mentioned foreign currency transactions through arrangements with third party correspondents.

OTHER COMPREHENSIVE LOSS

OTHER COMPREHENSIVE LOSS	12 Months Ended
	Dec. 31, 2023
Equity [Abstract]
OTHER COMPREHENSIVE LOSS	OTHER COMPREHENSIVE INCOME (LOSS) The following tables present a reconciliation of the changes in the components of other comprehensive income (loss) for the periods indicated, including the amount of income tax (expense) benefit allocated to each component of other comprehensive income (loss): Year Ended December 31, 2023 Pre-Tax Tax (Expense) After Tax (Dollars in thousands) Change in fair value of securities available for sale $ 42,019 $ (9,593) $ 32,426 Less: net security losses reclassified into other noninterest expense — — — Net change in fair value of securities available for sale 42,019 (9,593) 32,426 Change in fair value of cash flow hedges (5,078) 1,428 (3,650) Less: net cash flow hedge losses reclassified into interest income or interest expense (27,414) 7,709 (19,705) Net change in fair value of cash flow hedges 22,336 (6,281) 16,055 Net unamortized gain related to defined benefit pension and other postretirement adjustments arising during the period 210 (59) 151 Amortization of net actuarial gains (536) 151 (385) Amortization of net prior service costs 39 (11) 28 Amortization of net settlement credits (25) 7 (18) Net change in other comprehensive income for defined benefit postretirement plans (1) (312) 88 (224) Total other comprehensive income $ 64,043 $ (15,786) $ 48,257 Year Ended December 31, 2022 Pre-Tax Tax (Expense) After Tax (Dollars in thousands) Change in fair value of securities available for sale $ (155,037) $ 36,047 $ (118,990) Less: net security losses reclassified into other noninterest expense — — — Net change in fair value of securities available for sale (155,037) 36,047 (118,990) Change in fair value of cash flow hedges (65,586) 18,452 (47,134) Less: net cash flow hedge gains reclassified into interest income or interest expense 5,054 (1,421) 3,633 Net change in fair value of cash flow hedges (70,640) 19,873 (50,767) Net unamortized gain related to defined benefit pension and other postretirement adjustments arising during the period 5,603 (1,575) 4,028 Amortization of net actuarial losses 635 (179) 456 Amortization of net prior service costs 39 (11) 28 Amortization of net settlement credits (31) 9 (22) Net change in other comprehensive income for defined benefit postretirement plans (1) 6,246 (1,756) 4,490 Total other comprehensive loss $ (219,431) $ 54,164 $ (165,267) Year Ended December 31, 2021 Pre-Tax Tax (Expense) After Tax (Dollars in thousands) Change in fair value of securities available for sale $ (29,995) $ 7,073 $ (22,922) Less: net security losses reclassified into other noninterest expense — — — Net change in fair value of securities available for sale (29,995) 7,073 (22,922) Change in fair value of cash flow hedges (7,938) 2,234 (5,704) Less: net cash flow hedge gains reclassified into interest income or interest expense 18,691 (5,256) 13,435 Net change in fair value of cash flow hedges (26,629) 7,490 (19,139) Net unamortized gain related to defined benefit pension and other postretirement adjustments arising during the period 3,414 (960) 2,454 Amortization of net actuarial losses 1,331 (374) 957 Amortization of net prior service costs 192 (54) 138 Net change in other comprehensive income for defined benefit postretirement plans (1) 4,937 (1,388) 3,549 Total other comprehensive loss $ (51,687) $ 13,175 $ (38,512) (1) The amortization of prior service costs is included in the computation of net periodic pension costs as disclosed in Note 12 - Employee Benefit Plans within the Notes to the Consolidated Financial Statements in Item 8. Information on the Company's accumulated other comprehensive income (loss), net of tax, is comprised of the following components as of the dates indicated: Unrealized Gain (Loss) on Securities Unrealized Gain (Loss) on Cash Flow Hedge Defined Benefit Postretirement Plans Accumulated Other Comprehensive Income (Loss) (Dollars in Thousands) Beginning balance: January 1, 2021 $ 13,255 $ 33,276 $ (5,836) $ 40,695 Other comprehensive income (loss) (22,922) (19,139) 3,549 (38,512) Ending balance: December 31, 2021 $ (9,667) $ 14,137 $ (2,287) $ 2,183 Other comprehensive income (loss) (118,990) (50,767) 4,490 (165,267) Ending balance: December 31, 2022 $ (128,657) $ (36,630) $ 2,203 $ (163,084) Other comprehensive income (loss) 32,426 16,055 (224) 48,257 Ending balance: December 31, 2023 $ (96,231) $ (20,575) $ 1,979 $ (114,827)

LEASES (Notes)

LEASES (Notes)	12 Months Ended
	Dec. 31, 2023
Leases [Abstract]
Lessee, Operating Leases [Text Block]	LEASES As of December 31, 2023, the Company had entered into 119 noncancellable operating lease agreements for office space, parking , space for ATM locations and certain branch locations, several of which contain renewal options to extend lease terms for a period of 1 to 20 years. The Company has no material financing leases outstanding and no leases with residual value guarantees. As of December 31, 2023, the Company did not have any material sub-lease agreements. The Company's right-of-use asset related to operating leases totaled $54.1 million and $58.9 million at December 31, 2023 and 2022, respectively, and is recognized in the Company's Consolidated Balance Sheet within other assets When a decision is made to exit a leased location, the Company may incur certain termination costs and/or lease impairment charges, if applicable. Accordingly, the Company recognized $589,000, $4.4 million, and $2.3 million of such exit costs during the years ended December 31, 2023, 2022, and 2021, respectively, with the 2022 and 2021 costs recorded through merger and acquisition expense within the consolidated income statements in relation to the Meridian acquisition. The following table provides information related to the Company's lease costs for the periods indicated: Years Ended December 31 2023 2022 2021 (Dollars in thousands) Operating lease costs (1) $ 14,472 $ 17,322 $ 14,550 Short-term lease costs 28 72 23 Variable lease costs — — — Total lease costs $ 14,500 $ 17,394 $ 14,573 Weighted-average remaining lease term - operating leases 5.61 years 5.46 years 5.72 years Weighted-average discount rate - operating leases 2.98 % 2.43 % 1.97 % (1) Operating lease costs for the periods presented are inclusive of lease exit costs noted above. The following table sets forth the undiscounted cash flows of base rent related to operating leases outstanding at December 31, 2023 with payments scheduled over the next five years and thereafter, including a reconciliation to the operating lease liability recognized in the Company's Consolidated Balance Sheet in other liabilities: (Dollars in thousands) 2024 $ 13,961 2025 13,050 2026 10,910 2027 8,243 2028 5,243 Thereafter 10,395 Total minimum lease payments 61,802 Less: amount representing interest 5,525 Present value of future minimum lease payments $ 56,277

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	12 Months Ended
	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Financial Instruments with Off-Balance Sheet Risk In the normal course of business, the Company enters into various transactions to meet the financing needs of its customers, which, in accordance with GAAP, are not included in its consolidated balance sheets. These transactions include commitments to extend credit, standby letters of credit, and loans sold with recourse, which involve, to varying degrees, elements of credit risk and interest rate risk in excess of the amounts recognized in the consolidated balance sheets. The Company minimizes its exposure to loss under these commitments by subjecting them to credit approval and monitoring procedures. The Company enters into contractual commitments to extend credit, normally with fixed expiration dates or termination clauses, at specified rates and for specific purposes. Substantially all of these commitments to extend credit are contingent upon customers maintaining specific credit standards at the time of loan funding. Standby letters of credit are written conditional commitments issued to guarantee the performance of a customer to a third party. In the event the customer does not perform in accordance with the terms of the agreement with the third party, the Company would be required to fund the commitment. The maximum potential amount of future payments the Company could be required to make is represented by the contractual amount of the commitment. If the commitment were funded, the Company would be entitled to seek recovery from the customer. The Company’s policies generally require that standby letter of credit arrangements contain security and other covenants similar to those contained in loan agreements. The fees collected in connection with the issuance of standby letters of credit are representative of the fair value of the obligation undertaken in issuing the guarantee. In accordance with applicable accounting standards related to guarantees, fees collected in connection with the issuance of standby letters of credit are deferred. The fees are then recognized in income proportionately over the life of the standby letter of credit agreement. The deferred standby letter of credit fees represent the fair value of the Company's potential obligations under the standby letter of credit guarantees. The following table summarizes the above financial instruments at the dates indicated: As of December 31 2023 2022 (Dollars in thousands) Commitments to extend credit $ 4,632,105 $ 4,566,041 Loan exposures sold with recourse $ 153,850 $ 167,274 Standby letters of credit $ 21,427 $ 24,941 Deferred standby letter of credit fees $ 155 $ 168 Other Contingencies At December 31, 2023, Rockland Trust was involved in pending lawsuits that arose in the ordinary course of business. Management has reviewed these pending lawsuits with legal counsel and has taken into consideration the view of counsel as to their outcome. In the opinion of management, the final disposition of pending lawsuits is not expected to have a material adverse effect on the Company’s financial position or results of operations.

REGULATORY CAPITAL REQUIREMENTS

REGULATORY CAPITAL REQUIREMENTS	12 Months Ended
	Dec. 31, 2023
Regulated Operations [Abstract]
REGULATORY CAPITAL REQUIREMENTS	REGULATORY MATTERS Regulatory Capital Requirements The Company and the Bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of the Company’s and the Bank’s 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 weightings and other factors. At December 31, 2023 the most recent notification from the Federal Deposit Insurance Corporation indicated that the Bank's capital levels met or exceeded the minimum levels to be considered "well capitalized" for bank regulatory purposes. To be categorized as well capitalized, an institution must maintain minimum total risk-based, Tier 1 risk-based, Common equity Tier 1 risk-based and Tier 1 leverage ratios as set forth in the following tables. There are no conditions or events since the notification that management believes have changed the Bank’s category. Management believes, as of December 31, 2023 and 2022, that the Company and the Bank met all capital adequacy requirements to which they are subject. The Company’s and the Bank’s actual capital amounts and ratios as of December 31, 2023 and 2022 are also presented in the table that follows: Actual For Capital To Be Well Capitalized Amount Ratio Amount Ratio Amount Ratio December 31, 2023 (Dollars in thousands) Independent Bank Corp. Total capital (to risk weighted assets) $ 2,268,863 15.91 % $ 1,140,554 ≥ 8.0 % N/A N/A Common equity tier 1 capital (to risk weighted assets) $ 2,022,873 14.19 % $ 641,562 ≥ 4.5 % N/A N/A Tier 1 capital (to risk weighted assets) $ 2,022,873 14.19 % $ 855,416 ≥ 6.0 % N/A N/A Tier 1 capital (to average assets) leverage $ 2,022,873 10.96 % $ 737,984 ≥ 4.0 % N/A N/A Rockland Trust Company Total capital (to risk weighted assets) $ 2,183,436 15.32 % $ 1,140,550 ≥ 8.0 % $ 1,425,687 ≥ 10.0 % Common equity tier 1 capital (to risk weighted assets) $ 2,048,426 14.37 % $ 641,559 ≥ 4.5 % $ 926,696 ≥ 6.5 % Tier 1 capital (to risk weighted assets) $ 2,048,426 14.37 % $ 855,412 ≥ 6.0 % $ 1,140,550 ≥ 8.0 % Tier 1 capital (to average assets) leverage $ 2,048,426 11.10 % $ 738,055 ≥ 4.0 % $ 922,568 ≥ 5.0 % December 31, 2022 (Dollars in thousands) Independent Bank Corp. Total capital (to risk weighted assets) $ 2,311,824 16.11 % $ 1,148,328 ≥ 8.0 % N/A N/A Common equity tier 1 capital (to risk weighted assets) $ 2,057,099 14.33 % $ 645,935 ≥ 4.5 % N/A N/A Tier 1 capital (to risk weighted assets) $ 2,057,099 14.33 % $ 861,246 ≥ 6.0 % N/A N/A Tier 1 capital (to average assets) $ 2,057,099 10.99 % $ 748,775 ≥ 4.0 % N/A N/A Rockland Trust Company Total capital (to risk weighted assets) $ 2,162,752 15.07 % $ 1,148,329 ≥ 8.0 % $ 1,435,411 ≥ 10.0 % Common equity tier 1 capital (to risk weighted assets) $ 2,018,912 14.07 % $ 645,935 ≥ 4.5 % $ 933,017 ≥ 6.5 % Tier 1 capital (to risk weighted assets) $ 2,018,912 14.07 % $ 861,247 ≥ 6.0 % $ 1,148,329 ≥ 8.0 % Tier 1 capital (to average assets) $ 2,018,912 10.78 % $ 748,828 ≥ 4.0 % $ 936,036 ≥ 5.0 % In addition to the minimum risk-based capital requirements outlined in the table above, the Company is required to maintain a minimum capital conservation buffer, in the form of common equity, in order to avoid restrictions on capital distributions and discretionary bonuses. The required amount of the capital conservation buffer is 2.5%. The Company's capital levels exceeded the minimum requirement plus the buffer of 2.5% as of December 31, 2023 and 2022. Dividend Restrictions The Company is subject to capital and dividend requirements administered by federal and state bank regulators, and the Company will not declare a cash dividend that would cause the Company to violate regulatory requirements. The Company is, in the ordinary course of business, dependent upon the receipt of cash dividends from the Bank to pay cash dividends to shareholders and satisfy the Company’s other cash needs. Federal and state law impose limits on capital distributions by the Bank. Massachusetts-chartered banks, such as the Bank, may declare from net profits cash dividends not more frequently than quarterly and non-cash dividends at any time. No dividends may be declared, credited, or paid if the Bank’s capital stock would be impaired. Massachusetts Bank Commissioner approval is required if the total of all dividends declared by the Bank in any calendar year would exceed the total of its net profits for that year combined with its retained net profits of the preceding two years, less any required transfer to surplus or a fund for the retirement of any preferred stock. Dividends paid by the Bank to the Company for the years ended December 31, 2023 and 2022 totaled $228.9 million and $209.2 million, respectively. Trust Preferred Securities In accordance with the applicable accounting standard related to variable interest entities, the common stock of trusts which have issued trust preferred securities have not been included in the consolidated financial statements of the Company. At both December 31, 2023 and 2022, there were $61.0 million in trust preferred securities that have been included within total capital of the Company for regulatory reporting purposes pursuant to the Federal Reserve's capital adequacy guidelines. For regulatory purposes, bank holding companies are allowed to include trust preferred securities in Tier 1 capital up to a certain limit. Provisions in the Dodd-Frank Act generally exclude trust preferred securities from Tier 1 capital, however, holding companies with consolidated assets of less than $15 billion at December 31, 2009, are able to permanently include these instruments in Tier 1 capital, unless the Company crosses the consolidated assets threshold as a result of merger and acquisition activity. Accordingly, as the Company’s 2021 acquisition of Meridian resulted in the crossing of $15 billion in its consolidated assets, its trust preferred securities were phased out of Tier 1 capital and included within Tier 2 capital as of December 31, 2021, in accordance with applicable regulatory guidance. All obligations under these trust preferred securities are unconditionally guaranteed by the Company.

PARENT COMPANY FINANCIALS ONLY

PARENT COMPANY FINANCIALS ONLY	12 Months Ended
	Dec. 31, 2023
Condensed Financial Information Disclosure [Abstract]
PARENT COMPANY FINANCIAL STATEMENTS	PARENT COMPANY FINANCIAL STATEMENTS Condensed financial information relative to the balance sheets of Independent Bank Corp., as the parent company, at December 31, 2023 and 2022 and the related statements of income and cash flows for the years ended December 31, 2023, 2022, and 2021 are presented below. The statement of stockholders’ equity is not presented below as the parent company’s stockholders’ equity is that of the consolidated Company. BALANCE SHEETS December 31 2023 2022 (Dollars in thousands) Assets Cash (1) $ 108,788 $ 169,977 Investments in subsidiaries (2) 2,922,698 2,850,407 Prepaid income taxes 2,488 2,299 Deferred tax asset 429 453 Other assets (2) — 2,297 Total assets $ 3,034,403 $ 3,025,433 Liabilities and stockholders’ equity Dividends payable $ 23,580 $ 25,103 Junior subordinated debentures (less unamortized debt issuance costs of $30 and $33) 62,858 62,855 Subordinated debentures (less unamortized debt issuance costs of $20 and $115) 49,980 49,885 Other liabilities 2,734 889 Total liabilities 139,152 138,732 Stockholders’ equity 2,895,251 2,886,701 Total liabilities and stockholders’ equity $ 3,034,403 $ 3,025,433 (1) Entire balance eliminates in consolidation. (2) Majority of balance eliminates in consolidation. STATEMENTS OF INCOME Years Ended December 31 2023 2022 2021 (Dollars in thousands) Income Dividends received from subsidiaries (1) $ 229,046 $ 209,257 $ 77,673 Total income 229,046 209,257 77,673 Expenses Interest expense 6,829 4,626 4,493 Other expenses 3,156 1,680 — Total expenses 9,985 6,306 4,493 Income before income taxes and equity in undistributed income of subsidiaries 219,061 202,951 73,180 Income tax benefit (2,785) (1,731) (1,241) Income of parent company 221,846 204,682 74,421 Equity in undistributed income of subsidiaries 17,656 59,131 46,571 Net income $ 239,502 $ 263,813 $ 120,992 (1) Majority of balance eliminated in consolidation. STATEMENTS OF CASH FLOWS Years Ended December 31 2023 2022 2021 (Dollars in thousands) Cash flows from operating activities Net income $ 239,502 $ 263,813 $ 120,992 Adjustments to reconcile net income to cash provided by operating activities Amortization 98 96 137 Deferred income tax expense 24 28 12 Change in prepaid income taxes and other assets 2,107 (623) (229) Change in other liabilities 52 143 (1,873) Equity in undistributed income of subsidiaries (17,656) (59,131) (46,571) Net cash provided by operating activities 224,127 204,326 72,468 Cash flows provided by investing activities Net cash acquired in business combinations — — 119,816 Net cash provided by in investing activities — — 119,816 Cash flows used in financing activities Repayments of long-term debt, net of issuance costs — (14,063) (18,750) Restricted stock awards issued, net of awards surrendered (1,142) (1,084) (1,249) Net proceeds from exercise of stock options 80 — (57) Proceeds from shares issued under direct stock purchase plan 2,662 2,359 2,023 Payments for shares repurchased under share repurchase programs (188,910) (139,946) — Common dividends paid (98,006) (93,734) (62,736) Net cash used in financing activities (285,316) (246,468) (80,769) Net (decrease) increase in cash and cash equivalents (61,189) (42,142) 111,515 Cash and cash equivalents at the beginning of the year 169,977 212,119 100,604 Cash and cash equivalents at the end of the year $ 108,788 $ 169,977 $ 212,119

TRANSACTIONS WITH RELATED PARTI

TRANSACTIONS WITH RELATED PARTIES (Notes)	12 Months Ended
	Dec. 31, 2023
Related Party Transactions [Abstract]
Related Party Transactions Disclosure [Text Block]	TRANSACTIONS WITH RELATED PARTIES Certain directors and officers (including their affiliates, certain family members and entities in which they are principal owners) of the Company are customers of and have had, and are expected to have, transactions with the Company, within the ordinary course of business. These transactions include, but are not limited to, lending activities, deposit services, investment management, and property lease commitments. In the opinion of management, such transactions are consistent with prudent banking practices and are within applicable banking regulations. Lending Activities The following information represents annual activity of loans to related parties for the periods indicated: 2023 2022 2021 (Dollars in thousands) Principal balance of loans outstanding at beginning of year $ 26,721 $ 45,033 $ 26,343 Loan advances (1) 911 40,427 57,983 Loan payments/payoffs (1,336) (43,147) (39,293) Reduction for retired directors and/or changes in director status (14,369) (15,592) — Principal balance of loans outstanding at end of year $ 11,927 $ 26,721 $ 45,033 (1) The 2021 amount includes $10.6 million of loans associated with a new director, which represent the outstanding loans balances at the effective date of appointment. At December 31, 2023 and 2022, there were no loans to related parties which were past due, on nonaccrual status or that had been restructured due to financial difficulty. Deposits At December 31, 2023 and 2022, the amount of deposit balances of related parties totaled $3.9 million and $18.5 million, respectively. Lease Commitments At December 31, 2023 and 2022, there were no material leases with related parties.

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2023
Accounting Policies [Abstract]
PRINCIPLES OF CONSOLIDATION	The consolidated financial statements include the accounts of the Company, the Bank and other wholly-owned subsidiaries, except subsidiaries that are not deemed necessary to be consolidated. All significant intercompany balances and transactions have been eliminated in consolidation. The Company determines whether it has a controlling financial interest in an entity by first evaluating whether the entity is a voting interest entity or a variable interest entity under GAAP. Voting interest entities are entities in which the total equity investment at risk is sufficient to enable the entity to finance itself independently and provides the equity holders with the obligation to absorb losses, the right to receive residual returns and the right to make decisions about the entity’s activities. The Company would consolidate voting interest entities in which it has all, or at least a majority of, the voting interest. As defined in applicable accounting standards, variable interest entities ("VIEs") are entities that lack one or more of the characteristics of a voting interest entity. A controlling financial interest in a VIE is present when the Company has both the power and ability to direct the activities of the VIE that most significantly impact the VIE's economic performance and an obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE. The Company also owns the common stock of various trusts which have issued trust preferred securities. These trusts are VIEs in which the Company is not the primary beneficiary and, therefore, are not consolidated. The trust's only assets are junior subordinated debentures issued by the Company, which were acquired by the trust using the proceeds from the issuance of the trust preferred securities and common stock. The junior subordinated debentures are included in long-term debt and the Company’s equity interest in the trust is included in other assets in the accompanying Consolidated Balance Sheets. Interest expense on the junior subordinated debentures is reported in interest expense on long-term debt in the accompanying Consolidated Statements of Income.
RECLASSIFICATION	Reclassification Certain previously reported amounts have been reclassified to conform to the current year’s presentation.
USE OF ESTIMATES	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could vary from these estimates. Material estimates that are particularly susceptible to significant changes in the near-term relate to the determination of the allowance for expected credit losses on loans held for investment, income taxes, valuation and allowance for expected credit losses on investment securities,
SIGNIFICANT CONCENTRATIONS OF CREDIT RISK	Concentrations of Credit Risk
CASH AND CASH EQUIVALENTS	Cash and Cash Equivalents For purposes of reporting cash flows, cash and cash equivalents may include cash on hand, amounts due from banks, inclusive of interest-earning deposits held at banks, and federal funds sold. Generally, federal funds are sold for up to two week periods.
SECURITIES	Securities Investment securities are classified at the time of purchase as available for sale, held to maturity, trading, or equity. Classification is constantly re-evaluated for consistency with corporate goals and objectives. Trading and equity securities are recorded at fair value with subsequent changes in fair value recorded in earnings. Debt securities that management has the positive intent and ability to hold to maturity are classified as held to maturity and recorded at amortized cost. Securities not classified as held to maturity or trading are classified as available for sale and recorded at fair value, with changes in fair value excluded from earnings and reported in other comprehensive income, net of related tax. Purchase premiums and discounts are recognized in interest income, using the interest method, to arrive at periodic interest income at a constant effective yield, thereby reflecting the securities market yield. Gains and losses on the sale of securities are recorded on the trade date and are determined using the specific identification method. Such gains and losses are recognized within non-interest income or non-interest expense within the consolidated statements of income. Accrued interest receivable balances are excluded from the amortized cost of held to maturity securities and the fair value of available for sale securities and are included within other assets on the Consolidated Balance Sheets. Management has elected not to measure an allowance for credit losses on these balances as the Company employs a timely write-off policy. It is the Company's policy that a security is placed on nonaccrual status at the time any principal or interest payments become 90 days delinquent, and interest earned but not collected for a security placed on non-accrual is reversed against interest income. Allowance for Credit Losses - Available for Sale Securities The Company's available for sale securities are carried at fair value and assessed for estimated credit losses in accordance with the current expected credit loss ("CECL") methodology. For available for sale securities in an unrealized loss position, management will first evaluate whether there is intent to sell, or if it is more likely than not that the Company will be required to sell a security prior to anticipated recovery of its amortized cost basis. If either of these criteria are met, the Company will record a write-down of the security's amortized cost basis to fair value through income. For those available for sale securities which do not meet the intent or requirement to sell criteria, management will evaluate whether the decline in fair value is a result of credit related matters or other factors. In performing this assessment, management considers the creditworthiness of the issuer including whether the security is guaranteed by the U.S. Federal Government or other government agency, the extent to which fair value is less than amortized cost, and changes in credit rating during the period, among other factors. If this assessment indicates the existence of credit losses, the security will be written down to fair value, as determined by a discounted cash flow analysis. To the extent the estimated cash flows do not support the amortized cost, the deficiency is considered to be due to credit loss and is recognized in earnings. Changes in the allowance for credit losses are recorded as a provision for (or reversal of) credit loss expense. Losses are charged against the allowance when the uncollectibility of a security is confirmed, or when either of the aforementioned criteria surrounding intent or requirement to sell have been met. Allowance for Credit Losses - Held to Maturity Securities The Company measures expected credit losses on held to maturity securities on a collective basis by major security type in accordance with the CECL methodology. Management classifies the held to maturity portfolio into the following major security types: U.S. Government Agency, U.S. Treasury, Agency Mortgage-Backed Securities, Agency Collateralized Mortgage Obligations, Small Business Administration Pooled Securities, and Single Issuer Trust Preferred Securities. Securities in the Company's held to maturity portfolio are primarily guaranteed by either the U.S. Federal Government or other government sponsored agencies with a long history of no credit losses. As a result, management has determined these securities to have a zero loss expectation and therefore does not estimate an allowance for credit losses on these securities.
LOANS HELD FOR SALE	Loans Held for Sale The Bank may choose to classify new residential real estate mortgage loans as held for sale based on intent, which is determined when loans are underwritten. Residential real estate mortgage loans not designated as held for sale are retained based upon available liquidity, for interest rate risk management and other business purposes. The Company has elected the fair value option to account for originated closed loans intended for sale. Accordingly, changes in fair value relating to loans intended for sale are recorded in earnings and are offset by changes in fair value relating to interest rate lock commitments and forward sales commitments. Gains and losses on residential loan sales (sales proceeds minus carrying amount) are recorded in mortgage banking income. Upfront costs and fees related to items for which the fair value option is elected are recognized in earnings as incurred and are not deferred.
Financing Receivable, Allowance for Credit Losses, Policy for Uncollectible Amounts	Allowance for Credit Losses - Loans Held for Investment The allowance for credit losses is established based upon the Company's current estimate of expected lifetime credit losses on loans measured at amortized cost, also referred to as the CECL methodology. Credit losses are charged against the allowance when management's assessments confirm that the Company will not collect the full amortized cost basis of a loan. Subsequent recoveries, if any, are credited to the allowance. Under the CECL methodology, the Company estimates credit losses for financial assets on a collective basis for loans sharing similar risk characteristics using a quantitative model combined with an assessment of certain qualitative factors designed to address forecast risk and model risk inherent in the quantitative model output. The quantitative model utilizes a factor based approach to estimate expected credit losses using Probability of Default ("PD"), Loss Given Default ("LGD") and Exposure at Default ("EAD"), which are derived from internal historical default and loss experience. The model estimates expected credit losses using loan level data over the estimated life of the exposure, considering the effect of prepayments. Economic forecasts are incorporated into the estimate over a reasonable and supportable forecast period, beyond which is a reversion to the Company's historical long-run average. Management has determined a reasonable and supportable period of 12 months, and a straight line reversion period of 6 months, to be appropriate for purposes of estimating expected credit losses. The qualitative risk factors impacting the expected risk of loss within the portfolio include the following: • Lending policies and procedures • Economic and business conditions • Nature and volume of loans • Changes in management • Changes in credit quality • Changes in loan review system • Changes to underlying collateral values • Concentrations of credit risk • Model imprecision • Other external factors Loans that do not share similar risk characteristics with any pools of assets are subject to individual evaluation and are removed from the collectively assessed pools to avoid double counting. For the loans that are individually evaluated, the Company uses either a discounted cash flow (“DCF”) approach or a fair value of collateral approach. The latter approach is used for loans deemed to be collateral dependent or when foreclosure is probable. Loan modifications made to borrowers experiencing financial difficulty are evaluated on a collective basis with loans sharing similar risk characteristics in accordance with the CECL methodology. Under previously applicable accounting guidance, the Company determined the amount of allowance for credit losses on TDRs using a discounted cash flow analysis or a fair value of collateral approach if the loan was determined to be individually evaluated. This change in methodology did not have a material impact on the Company's allowance for credit loss estimate. Accrued interest receivable amounts are excluded from balances of loans held at amortized cost and are included within other assets on the consolidated balance sheets. Management has elected not to measure an allowance for credit losses on these amounts as the Company employs a timely write-off policy. Consistent with the Company's policy for nonaccrual loans, accrued interest receivable is typically written off when loans reach 90 days past due and are placed on nonaccrual status.
ACQUIRED LOANS	Acquired Loans Loans acquired through purchase or a business combination are recorded at their fair value at the acquisition date. The Company performs an assessment of acquired loans to first determine if such loans have experienced a more than insignificant deterioration in credit quality since their origination and thus should be classified and accounted for as PCD loan. For loans that have not experienced a more than insignificant deterioration in credit quality since origination, referred to as non-PCD loans, the Company records such loans at fair value, with any resulting discount or premium accreted or amortized into interest income over the remaining life of the loan using the interest method. Additionally, upon the purchase or acquisition of non-PCD loans, the Company measures and records a reserve for credit losses based on the Company’s methodology for determining the allowance under CECL. The allowance for non-PCD loans is recorded through a charge to provision for credit losses in the period in which the loans were purchased or acquired. Acquired loans that are classified as PCD are acquired at fair value, including any resulting discounts or premiums. Discounts and premiums are accreted or amortized into interest income over the remaining life of the loan using the interest method. In contrast to non-PCD loans, the initial allowance for credit losses on PCD loans is established through an adjustment to the acquired loan balance, rather than through a charge to provision for credit losses, in the period in which the loans were acquired. The allowance for PCD loans is determined based upon the Company's methodology for estimating the allowance under CECL, and is recorded as an adjustment to the acquired loan balance on the date of acquisition. The Company evaluates acquired loans for deterioration in credit quality based on a variety of characteristics, including, but not limited to non-accrual and delinquency status, downgrades in credit quality since origination, loans that have been modified, along with any other factors identified by the Company through its initial analysis of acquired loans which may indicate there has been a more than insignificant deterioration in credit quality since origination. At the acquisition date, an estimate of expected credit losses is made for groups of PCD loans with similar risk characteristics and individual PCD loans without similar risk characteristics, if applicable. Subsequent to acquisition, the allowance for credit losses for both non-PCD and PCD loans are determined with the use of the Company’s allowance methodology under CECL, in the same manner as all other loans. Transfers and Servicing of Financial Assets Transfers of financial assets 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 (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity. Loans held for sale are generally sold with servicing rights released, however if rights are retained, servicing assets are recognized as separate assets. Servicing rights are originally recorded at fair value within other assets, but subsequently are amortized in proportion to and over the period of estimated net servicing income, and are assessed for impairment at each reporting date. Fair value is based on market prices for comparable mortgage servicing contracts, when available, or alternatively, 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, the custodial earnings rate, an inflation rate, ancillary income, prepayment speeds, default rates and losses. Impairment is determined by stratifying the rights based on predominant characteristics, such as interest rate, loan type and investor type. Impairment is recognized through a valuation allowance, to the extent that fair value is less than the capitalized amount. If the Company later determines that all or a portion of the impairment no longer exists, a reduction of the allowance may be recorded as an increase to income. Servicing fee income is recorded for fees earned for servicing loans for investors. The fees are based on a contractual percentage of the outstanding principal or a fixed amount per loan, and are recorded as income when earned. The amortization of mortgage servicing rights is recorded as a reduction of loan servicing fee income. The Company is also a party to certain instruments with off-balance-sheet risk including certain residential loans sold to investors with recourse. The Company's policy is to record such instruments when funded.
FEDERAL HOME LOAN BANK STOCK	Federal Home Loan Bank Stock The Company, as a member of the Federal Home Loan Bank ("FHLB") of Boston, is required to maintain an investment in capital stock of the FHLB. Based on redemption provisions, the stock has no quoted market value and is carried at cost. The Company continually reviews its investment to determine if impairment exists. The Company reviews recent public filings, rating agency analysis and other factors when making its determination.
BANK PREMISES AND EQUIPMENT	Bank Premises and Equipment Land is carried at cost. Bank premises and equipment are stated at cost less accumulated depreciation. Depreciation is computed using the straight-line convention method over the estimated useful lives of the assets. Leasehold improvements are amortized over the shorter of the lease terms or the estimated useful lives of the improvements. Expected terms include lease option periods to the extent that the exercise of such options is reasonably assured, not to exceed fifteen years. Leases The Company leases office space, space for ATM and parking locations, and certain branch locations under noncancelable operating leases, several of which have renewal options to extend lease terms. Upon commencement of a new lease, the Company will recognize a right of use ("ROU") asset and corresponding lease liability. The Company makes the decision on whether to renew an option to extend a lease by considering various factors. The Company will recognize an adjustment to its ROU asset and lease liability when lease agreements are amended and executed, or in an event where the Company is reasonably certain that a renewal option will be exercised. The discount rate used in determining the present value of lease payments is based on the Company's incremental borrowing rate for borrowings with terms similar to each lease at commencement date. 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 has elected the short-term lease recognition exemption for all leases that qualify. The Company may also assume lease obligations in connection with its acquisition activities, which may result in a market-based favorable or unfavorable lease position, resulting in an intangible lease asset. These intangible lease assets are amortized over the estimated remaining lease term. The Company is a party to certain equipment lease transactions where it has assumed the role of lessor for purchased assets. These lease transactions are classified by the Company as either operating leases or direct financing leases for accounting purposes, depending upon the nature of the underlying lease agreements. Under operating lease arrangements, the leased asset value is recorded within fixed assets and the Company recognizes rental income over the life of the lease. Under direct financing lease arrangements, the leased asset value is de-recognized and offset with the recognition of a lease receivable that is evaluated for impairment in a manner similar to loans.
GOODWILL AND IDENTIABLE INTANGIBLE ASSETS	Goodwill and Other Intangible Assets Goodwill represents the excess of the purchase price over the net fair value of acquired businesses. Goodwill is not amortized and is assigned to one reporting unit. Goodwill is evaluated for impairment at least annually, or more often if warranted. In assessing for impairment, the Company has the option to first perform a qualitative analysis to determine whether the existence of events or circumstances leads to a determination that it is more-likely-than-not that the fair value of the reporting unit is less than its carrying amount. If, after assessing the totality of such events and circumstances, the Company determines it is more-likely-than-not that the fair value is less than carrying value, a quantitative impairment test is performed to compare carrying value to the fair value of the reporting unit. The Company also has an unconditional option to bypass the assessment of qualitative factors for any period and proceed directly to the quantitative goodwill impairment test. If the carrying amount of the reporting unit exceeds its fair value, an impairment loss will be recognized in an amount equal to that excess, limited to the total amount of goodwill allocated to that reporting unit.
IMPAIRMENT OF LONG-LIVED ASSETS OTHER THAN GOODWILL	Impairment of Long-Lived Assets Other Than Goodwill The Company reviews long-lived assets, including premises and equipment, for impairment whenever events or changes in business circumstances indicate that the remaining useful life may warrant revision or that the carrying amount of the long-lived asset may not be fully recoverable. The Company performs an undiscounted cash flow analysis to determine if impairment exists. When impairment is determined to exist, the related impairment loss is calculated based on fair value. Impairment losses on assets to be disposed of are based on the estimated proceeds to be received, less costs of disposal.
CASH SURRENDER VALUE OF LIFE INSURANCE POLICIES	Cash Surrender Value of Life Insurance Policies Increases in the cash surrender value ("CSV") of life insurance policies, as well as benefits received net of any CSV, are recorded in other noninterest income, and are generally not subject to income taxes. The CSV of the policies is recorded as an asset of the Bank, with liabilities recognized for any split dollar arrangements associated with the policies. The Company reviews the financial strength of the insurance carriers prior to the purchase of life insurance policies and no less than annually thereafter. Regulatory requirements limit the total amount of CSV to be held with any individual carrier to 15% of Tier 1 capital (as defined for regulatory purposes) and the total CSV of all life insurance policies is limited to 25% of Tier 1 capital.
OTHER REAL ESTATE OWNED AND OTHER FORECLOSED ASSETS	Other Real Estate Owned and Other Foreclosed Assets Real estate properties and other assets, which have served as collateral to secure loans, are held for sale and are initially recorded at fair value less estimated costs to sell at the date control is established, resulting in a new cost basis. The amount by which the recorded investment in the loan exceeds the fair value (net of estimated costs to sell) of the foreclosed asset is charged to the allowance for credit losses. Subsequent declines in the fair value of the foreclosed asset below the new cost basis are recorded through the use of a valuation allowance. Subsequent increases in the fair value are recorded as reductions in the valuation allowance, but not below zero. Upon a sale of a foreclosed asset, any excess of the carrying value over the sale proceeds is recognized as a loss on sale. Any excess of sale proceeds over the carrying value of the foreclosed asset is first applied as a recovery to the valuation allowance, if any, with the remainder being recognized as a gain on sale. Operating expenses and changes in the valuation allowance relating to foreclosed assets are recorded in other noninterest expense.
DERIVATIVES	Derivatives Derivative instruments are carried at fair value in the Company’s financial statements. The accounting for changes in the fair value of a derivative instrument is determined by whether it has been designated and qualifies as part of a hedging relationship, and further, by the type of hedging relationship. At the inception of a hedge, the Company documents certain items, including but not limited to the following: the relationship between hedging instruments and hedged items, the Company's risk management objectives, hedging strategies, and the evaluation of hedge transaction effectiveness. Documentation includes linking all derivatives designated as fair value or cash flow hedges to specific assets and liabilities on the balance sheet or to specific forecasted transactions. For those derivative instruments that are designated and qualify for special hedge accounting, the Company designates the hedging instrument, based upon the exposure being hedged, as either a fair value hedge or a cash flow hedge. For derivative instruments that are designated and qualify as a cash flow hedge (i.e., hedging the exposure to variability in expected future cash flows that is attributable to a particular risk), the effective portion of the gain or loss on the derivative instrument is reported as a component of other comprehensive income, net of related tax. The Company considers any economic mismatch between the hedging instrument and the hedged transaction in its ongoing assessment of hedge effectiveness. If the hedging instrument is not highly effective at achieving offsetting cash flows attributable to the revised contractually specified interest rate(s), hedge accounting will be discontinued. At that time, accumulated other comprehensive income would be frozen and amortized, as long as the forecasted transactions are still probable of occurring. For derivative instruments designated and qualifying as a fair value hedge (i.e., hedging the exposure to changes in the fair value of an asset or liability or an identified portion thereof that is attributable to the hedged risk), the gain or loss on the derivative instrument, as well as the offsetting gain or loss on the hedged item attributable to the hedged risk, are recognized in current earnings during the period of the change in fair values. Hedge accounting is discontinued prospectively when (1) a derivative is no longer highly effective in offsetting changes in the fair value or cash flow of a hedged item, (2) a derivative expires or is settled, (3) it is no longer likely that a forecasted transaction associated with the hedge will occur, or (4) it is determined that designation of a derivative as a hedge is no longer appropriate. To the extent the Company enters into new or re-designates existing hedging relationships, it is the Company's policy to include the Overnight Index Swap Rate based on the Fed Funds Effective Rate and the Overnight Index Swap Rate based on the Secured Overnight Financing Rate in the spectrum of available benchmark interest rates for hedge accounting.
RETIREMENT PLANS	Retirement Plans The Company has various retirement plans in place for current and former employees, including postretirement benefit plans, supplemental executive retirement plans, frozen multiemployer pension plans, deferred compensation plans, as well as other benefits. The postretirement benefit plans and the supplemental executive retirement plans are unfunded and therefore have no plan assets. The actuarial cost method used to compute the benefit liabilities and related expense is the projected unit credit method. The projected benefit obligation is principally determined based on the present value of the projected benefit distributions at an assumed discount rate. The discount rate which is utilized is based on the investment yield of high quality corporate bonds available in the market place with maturities approximately equal to projected cash flows of future benefit payments as of the measurement date. Periodic benefit expense (or income) includes service costs and interest costs based on the assumed discount rate, amortization of prior service costs due to plan amendments and amortization of actuarial gains and losses. Service costs are included in salaries and employee benefits and all other costs are included in other noninterest expense. The amortization of actuarial gains and losses is determined using the 10% corridor minimum amortization approach and is taken over the average remaining future working lifetime of the plan participants. The underfunded status of the plans is recorded as a liability on the balance sheet. The multiemployer pension plans' assets are determined based on fair value, generally representing observable market prices. The actuarial cost method used to compute the pension liabilities and related expense is the unit credit method. The pension expense is equal to the plan contribution requirement of the Company for the plan year. In conjunction with the acquisition of Blue Hills Bancorp, Inc., parent of Blue Hills Bank (collectively "BHB") the Company acquired BHB's defined benefit pension plan, which is administered by the Savings Banks Employees Retirement Association. The Company accounts for the plan using an actuarial model that allocates pension costs over the service period of employees in the plan. The Company accounts for the over-funded or under-funded status of the plan as an asset or liability on its consolidated balance sheets and recognizes changes in the funded status that are not reflected in net periodic pension cost as other comprehensive income or loss. BHB amended its defined benefit pension plan in 2013 freezing the plan to new participants and subsequently amended the plan and froze it for all participants effective October 31, 2014. The Director Deferred Compensation Plan allows directors to invest their funds into a diversified investment portfolio and the 401(k) Restoration Plan allows employees to invest their funds in both Company stock and other investment alternatives offered by the Plan. All funds under both of these plans are held in a rabbi trust. The plans do not permit diversification after initial election and therefore elections made to defer into Company stock result in both the investment and obligation recognized within Stockholders' Equity. Alternatively, investments not in Company stock are included in trading securities, with the correlating obligation classified as a liability.
STOCK-BASED COMPENSATION	Stock-Based Compensation The Company recognizes stock-based compensation based on the grant-date fair value of the award, with no adjustment for estimated forfeitures, as forfeitures are recognized when they occur. For restricted stock awards and units, the Company recognizes compensation expense ratably over the vesting period for the fair value of the award, measured at the grant date. For stock option awards, the Company values awards granted using the Black-Scholes option-pricing model. The Company recognizes compensation expense for these awards on a straight-line basis over the requisite service period for the entire award (straight-line attribution method), ensuring that the amount of compensation cost recognized at any date at least equals the portion of the grant-date fair value of the award that is vested at that time. The Company recognizes excess tax benefits on certain stock compensation transactions. The excess tax benefits are recorded through earnings as a discrete item within the Company’s effective tax rate during the period of the transaction.
INCOME TAXES	Income Taxes Deferred income tax assets and liabilities are determined using the asset and liability (or balance sheet) method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. If current available information raises doubt as to the realization of the deferred tax assets, a valuation allowance is established. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in enacted tax rates is recognized in income in the period that includes the enactment date. Income taxes are allocated to each entity in the consolidated group based on its share of taxable income. Management exercises significant judgment in evaluating the amount and timing of recognition of the resulting tax liabilities and assets, including projections of future taxable income. Additionally, a liability for unrecognized tax benefits is recorded for uncertain tax positions taken by the Company on its tax returns for which there is less than a 50% likelihood of being recognized upon a tax examination.
Low Income Housing Tax Credits Policy Text Block [Policy Text Block]	Low Income Housing Tax Credits
ASSETS UNDER ADMININSTRATION	Assets Under Administration Assets held in a fiduciary or agency capacity for customers are not included in the accompanying consolidated balance sheet, as such assets are not assets of the Company. Revenue from administrative and management activities associated with these assets is recorded on an accrual basis.
Extinguishment of Debt [Policy Text Block]	Extinguishment of Debt Upon extinguishment of an outstanding debt, the Company records the difference between the exit price and the net carrying amount of the debt as a gain or loss on the extinguishment. The gain or loss is recorded as a component of other noninterest income or other noninterest expense, respectively.
EARNINGS PER SHARE	Earnings Per Share Basic earnings per share is calculated using the two-class method. The two-class method is an earnings allocation formula under which earnings per share is calculated from common stock and participating securities according to dividends declared and participation rights in undistributed earnings. Under this method, all earnings, distributed and undistributed, are allocated to participating securities and common shares based on their respective rights to receive dividends. Unvested share-based payment awards that contain nonforfeitable rights to dividends are considered participating securities, not subject to performance based measures (i.e. unvested time-vested restricted stock). Basic earnings per share is calculated by dividing net income by the weighted average number of common shares outstanding (inclusive of participating securities). Diluted earnings per share have been calculated in a manner similar to that of basic earnings per share except that the weighted average number of common shares outstanding is increased to include the number of additional common shares that would have been outstanding if all potentially dilutive common shares (such as those resulting from the exercise of stock options or the attainment of performance measures) were issued during the period, computed using the treasury stock method.
COMPREHENSIVE INCOME	Comprehensive Income Comprehensive income consists of net income and other comprehensive income. Other comprehensive income includes unrealized gains and losses on securities available for sale, unrealized losses related to factors other than credit on debt securities, if applicable, unrealized gains and losses on cash flow hedges, deferred gains on hedge accounting transactions, and changes in the funded status of the Company’s postretirement and supplemental retirement plans.
FAIR VALUE MEASUREMENTS	Fair Value Measurements In general, fair values of financial instruments are based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based upon developed models that primarily use, as inputs, observable market-based parameters. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. These adjustments may include amounts to reflect counterparty credit quality and the Company’s creditworthiness, among other things, as well as unobservable parameters.
Lessee, Leases [Policy Text Block]
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Standards FASB ASC Topic 740 "Income Taxes" Update No. 2023-09. Update No. 2023-09 was issued in December 2023 and aims to enhance the transparency and decision usefulness of income tax disclosures by requiring disaggregated information related to the effective tax rate reconciliation as well as information on income taxes paid. This standard is effective for annual periods beginning after December 15, 2024 and requires prospective application with the option to apply retrospectively. The adoption of this standard will not have an impact on the Company's financial statements.
Policy Loans Receivable, Policy	Loans Held for Investment Loans that the Company has the intent and ability to hold until maturity or payoff are carried at amortized cost (net of the allowance for credit losses). Amortized cost is the principal amount outstanding, adjusted by partial charge-offs and net of deferred loan costs or fees. For originated loans, loan fees and certain direct origination costs are deferred and amortized into interest income over the expected term of the loan using the level-yield method. When a loan is paid off, the unamortized portion is recognized in interest income. Interest income on loans is accrued based upon the daily principal amount outstanding except for loans on nonaccrual status. As a general rule, loans 90 days or more past due with respect to principal or interest are classified as nonaccrual loans, or sooner if management considers such action to be prudent. However, loans that are 90 days or more past due may be kept on an accruing status if the loan is well secured and in the process of collection. Income accruals are suspended on all nonaccrual loans in a timely manner and all previously accrued and uncollected interest is reversed against current income. A loan remains on nonaccrual status until it becomes current with respect to principal and interest and remains current for a minimum period of six months, the loan is liquidated, or when the loan is determined to be uncollectible and is charged-off against the allowance for credit losses. When doubt exists as to the collectability of a loan, any payments received are applied to reduce the amortized cost of the loan to the extent necessary to eliminate such doubt. For all loan portfolios, a charge-off occurs when the Company determines that a specific loan, or portion thereof, is uncollectible. This determination is made based on management's review of specific facts and circumstances of the individual loan, including assessing the viability of the customer’s business or project as a going concern, the expected cash flows to repay the loan, the value of the collateral and the ability and willingness of any guarantors to perform. In the course of resolving problem loans, the Company may choose to modify the contractual terms of certain loans. The Company attempts to work out an alternative payment schedule with the borrower in order to avoid or cure a default. Terms may be modified to fit the ability of the borrower to repay in line with its current financial status and may include adjustments to term extensions, interest rates, other than insignificant payment delays and/or a combination thereof. These actions are intended to minimize economic loss and avoid foreclosure or repossession of collateral. If such efforts by the Bank do not result in satisfactory performance, the loan is referred to legal counsel, at which time foreclosure proceedings are initiated. At any time prior to a sale of the property at foreclosure, the Bank may terminate foreclosure proceedings if the borrower is able to work out a satisfactory payment plan. Any loans that are modified are reviewed by the Company to determine whether the modification is the direct result of a borrower experiencing financial difficulty, as the Company adopted the accounting and disclosure requirements for loan modifications made to borrowers experiencing financial difficulty and ceased to recognize troubled debt restructurings ("TDRs") effective January 1, 2023. Prior to this adoption, the Company would classify loans as TDRs in cases where a borrower was experiencing financial difficult and where the Company made certain concessionary modifications to contractual terms. Modifications included adjustments to interest rates, extensions of maturity, consumer loans where the borrower's obligations had been effectively discharged through Chapter 7 Bankruptcy and the borrower had not reaffirmed the debt to the Bank, and other actions intended to minimize economic loss and avoid foreclosure or repossession of collateral. Under the previously applicable guidance, loans classified as TDRs would have remained classified as such for the life of the loan, except in limited circumstances, when it was determined that the borrower was performing under the modified terms and the restructuring agreement specified an interest rate greater than or equal to an acceptable market rate for a comparable new loan at the time of the restructuring.
Credit Loss, Financial Instrument	Commercial Portfolio • Commercial and Industrial : Consists of revolving, non-revolving, and term loan obligations extended to business and corporate enterprises for the purpose of financing working capital and/or capital investment. Collateral generally consists of accounts receivable, inventory, plant and equipment, real estate, or other business assets. The primary source of repayment is operating cash flow and, secondarily, liquidation of assets. • Commercial Real Estate : Consists of mortgage loans to finance investment in real property such as multi-family residential, commercial/retail, office, industrial, hotels, educational and healthcare facilities, as well as other specific use properties and is inclusive of owner-occupied commercial properties. Loans are typically written with amortizing payment structures. Collateral values are determined based upon third party appraisals and evaluations. Permissible loan to value ratios at origination are governed by Company policy and regulatory guidelines. The primary source of repayment is cash flow from operating leases and rents and, secondarily, liquidation of assets. • Commercial Construction : Consists of short-term construction loans, revolving and nonrevolving credit lines and construction/permanent loans to finance the acquisition, development and construction or rehabilitation of real property. Project types include residential land development, one-to-four family, condominium, and multi-family home construction, commercial/retail, office, industrial, hotels, educational and healthcare facilities as well as other specific use properties. Loans may be written with nonamortizing or hybrid payment structures depending upon the type of project. Collateral values are determined based upon third party appraisals and evaluations. Permissible loan to value ratios at origination are governed by Company policy and regulatory guidelines. Repayment sources vary depending upon the type of project and may consist of proceeds from the sale or lease of units, operating cash flows or liquidation of other assets. • Small Business: Consists of revolving, term loan and mortgage obligations extended to sole proprietors and small businesses for purposes of financing working capital and/or capital investment. Collateral generally consists of pledges of business assets including, but not limited to, accounts receivable, inventory, plant and equipment, or real estate if applicable. The primary source of repayment is operating cash flows and, secondarily, liquidation of assets. For the commercial portfolio the Company typically obtains personal guarantees for payment from individuals holding material ownership interests in the borrowing entities. Consumer Portfolio • Residential Real Estate : Residential mortgage loans held in the Company’s portfolio are made to borrowers who demonstrate the ability to make scheduled payments with full consideration to underwriting factors such as current and expected income, employment status, current assets, other financial resources, credit history and the value of the collateral. Collateral consists of mortgage liens on one-to-four family residential properties. Residential mortgage loans also include loans to construct owner-occupied one-to-four family residential properties. • Home Equity : Home equity loans and credit lines are made to qualified individuals and are primarily secured by senior or junior mortgage liens on one-to-four family homes, condominiums or vacation homes. Each home equity loan has a fixed rate and is billed in equal payments comprised of principal and interest. The majority of home equity lines of credit have a variable rate and are billed in interest-only payments during the draw period. At the end of the draw period, the home equity line of credit is billed as a percentage of the then outstanding principal balance plus all accrued interest over a predetermined repayment period, as set forth in the note. Additionally, the Company has the option of renewing each line of credit for additional draw periods. Borrower qualifications include favorable credit history combined with supportive income requirements and combined loan to value ratios within established policy guidelines. • Other Consumer: Other consumer loan products include personal lines of credit and amortizing loans made to qualified individuals for various purposes such as debt consolidation, personal expenses or overdraft protection. Borrower qualifications include favorable credit history combined with supportive income and collateral requirements within established policy guidelines. These loans may be secured or unsecured. Credit Quality

SECURITIES (Tables)

SECURITIES (Tables)	12 Months Ended
	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Schedule of Equity securities gains and losses [Table Text Block]	The following table represents a summary of the gains and losses recognized within non-interest income and non-interest expense within the consolidated statements of income that relate to equity securities for the periods indicated: Years Ended December 31 2023 2022 2021 (Dollars in thousands) Net gains (losses) recognized during the period on equity securities $ 1,180 $ (3,061) $ 554 Less: net gains recognized during the period on equity securities sold during the period 197 — 192 Unrealized gains (losses) recognized during the reporting period on equity securities still held at the reporting date $ 983 $ (3,061) $ 362
Schedule of Available-for-sale Securities Reconciliation	The following table summarizes the amortized cost, allowance for credit losses, and fair value of available for sale securities and the corresponding amounts of gross unrealized gains and losses recognized in accumulated other comprehensive income (loss) at the dates indicated: December 31, 2023 December 31, 2022 Amortized Gross Gross Unrealized Allowance for credit losses Fair Amortized Gross Gross Unrealized Allowance for credit losses Fair (Dollars in thousands) U.S. government agency securities $ 230,198 $ — $ (23,060) $ — $ 207,138 $ 230,936 $ — $ (28,636) $ — $ 202,300 U.S. treasury securities 824,597 — (55,495) — 769,102 874,035 — (82,694) — 791,341 Agency mortgage-backed securities 314,269 24 (37,246) — 277,047 359,068 54 (45,434) — 313,688 Agency collateralized mortgage obligations 35,713 6 (2,530) — 33,189 41,874 — (3,031) — 38,843 State, county, and municipal securities 195 — (5) — 190 193 — (2) — 191 Pooled trust preferred securities issued by banks and insurers 1,188 — (170) — 1,018 1,203 — (169) — 1,034 Small business administration pooled securities 53,702 — (7,130) — 46,572 59,470 — (7,713) — 51,757 Total available for sale securities $ 1,459,862 $ 30 $ (125,636) $ — $ 1,334,256 $ 1,566,779 $ 54 $ (167,679) $ — $ 1,399,154
Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value	The following tables show the gross unrealized losses and fair value of the Company’s available for sale securities in an unrealized loss position as of the dates indicated. These available for sale securities are aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position: December 31, 2023 Less than 12 months 12 months or longer Total # of Fair Value Unrealized Fair Unrealized Fair Value Unrealized (Dollars in thousands) U.S. government agency securities 9 $ — $ — $ 207,138 $ (23,060) $ 207,138 $ (23,060) U.S. treasury securities 17 — — 769,102 (55,495) 769,102 (55,495) Agency mortgage-backed securities 115 1,091 (11) 273,447 (37,235) 274,538 (37,246) Agency collateralized mortgage obligations 12 339 (2) 31,682 (2,528) 32,021 (2,530) State, county, and municipal securities 1 190 (5) — — 190 (5) Pooled trust preferred securities issued by banks and insurers 1 — — 1,018 (170) 1,018 (170) Small business administration pooled securities 8 — — 46,572 (7,130) 46,572 (7,130) Total impaired available for sale securities 163 $ 1,620 $ (18) $ 1,328,959 $ (125,618) $ 1,330,579 $ (125,636) December 31, 2022 Less than 12 months 12 months or longer Total # of Fair Value Unrealized Fair Unrealized Fair Value Unrealized U.S. government agency securities 9 $ 60,575 $ (7,292) $ 141,725 $ (21,344) $ 202,300 $ (28,636) U.S. treasury securities 18 43,035 (6,350) 748,306 (76,344) 791,341 (82,694) Agency mortgage-backed securities 123 155,944 (15,186) 154,653 (30,248) 310,597 (45,434) Agency collateralized mortgage obligations 13 38,843 (3,031) — — 38,843 (3,031) State, county, and municipal securities 1 191 (2) — — 191 (2) Pooled trust preferred securities issued by banks and insurers 1 — — 1,034 (169) 1,034 (169) Small business administration pooled securities 8 34,511 (3,550) 17,246 (4,163) 51,757 (7,713) Total impaired available for sale securities 173 $ 333,099 $ (35,411) $ 1,062,964 $ (132,268) $ 1,396,063 $ (167,679)
Debt Securities, Held-to-maturity	The following table summarizes the amortized cost, fair value and allowance for credit losses of held to maturity securities and the corresponding amounts of gross unrealized gains and losses at the dates indicated: December 31, 2023 December 31, 2022 Amortized Gross Gross Unrealized Allowance for credit losses Fair Amortized Gross Gross Unrealized Allowance for credit losses Fair (Dollars in thousands) U.S. government agency securities $ 29,521 $ — $ (1,113) $ — $ 28,408 $ 31,258 $ — $ (2,222) — $ 29,036 U.S. treasury securities 100,712 — (9,177) — 91,535 100,634 — (11,755) — 88,879 Agency mortgage-backed securities 829,431 175 (65,878) — 763,728 898,927 408 (83,383) — 815,952 Agency collateralized mortgage obligations 477,517 — (69,606) — 407,911 535,971 — (77,554) — 458,417 Single issuer trust preferred securities issued by banks 1,500 — (127) — 1,373 1,500 8 — — 1,508 Small business administration pooled securities 130,426 384 (6,157) — 124,653 136,830 313 (6,225) — 130,918 Total held to maturity securities $ 1,569,107 $ 559 $ (152,058) $ — $ 1,417,608 $ 1,705,120 $ 729 $ (181,139) $ — $ 1,524,710
Schedule of Contractual Maturities of Securities	A schedule of the contractual maturities of securities available for sale and securities held to maturity at December 31, 2023 is presented below: Due in one year or less Due after one year to five years Due after five to ten years Due after ten years Total Amortized Fair Amortized Fair Amortized Fair Amortized Fair Amortized Fair (Dollars in thousands) Available for sale securities U.S. government agency securities $ — $ — $ 199,371 $ 179,973 $ 30,827 $ 27,165 $ — $ — $ 230,198 $ 207,138 U.S. treasury securities 197,553 193,192 627,044 575,910 — — — — 824,597 769,102 Agency mortgage-backed securities 3 3 141,212 126,484 40,183 34,939 132,871 115,621 314,269 277,047 Agency collateralized mortgage obligations — — — — 2,923 2,680 32,790 30,509 35,713 33,189 State, county, and municipal securities — — 195 190 — — — — 195 190 Pooled trust preferred securities issued by banks and insurers — — — — — — 1,188 1,018 1,188 1,018 Small business administration pooled securities — — — — — — 53,702 46,572 53,702 46,572 Total available for sale securities $ 197,556 $ 193,195 $ 967,822 $ 882,557 $ 73,933 $ 64,784 $ 220,551 $ 193,720 $ 1,459,862 $ 1,334,256 Held to maturity securities U.S. government agency securities $ 29,521 $ 28,408 $ — $ — $ — $ — $ — $ — $ 29,521 $ 28,408 U.S. Treasury securities — — 99,720 90,703 992 832 — — 100,712 91,535 Agency mortgage-backed securities — — 411,746 383,514 222,825 198,122 194,860 182,092 829,431 763,728 Agency collateralized mortgage obligations — — 63,596 58,934 20,210 17,864 393,711 331,113 477,517 407,911 Single issuer trust preferred securities issued by banks — — 1,500 1,373 — — — — 1,500 1,373 Small business administration pooled securities — — — — 5,742 5,272 124,684 119,381 130,426 124,653 Total held to maturity securities $ 29,521 $ 28,408 $ 576,562 $ 534,524 $ 249,769 $ 222,090 $ 713,255 $ 632,586 $ 1,569,107 $ 1,417,608 Total $ 227,077 $ 221,603 $ 1,544,384 $ 1,417,081 $ 323,702 $ 286,874 $ 933,806 $ 826,306 $ 3,028,969 $ 2,751,864

LOANS, ALLOWANCE FOR LOAN LOS_2

LOANS, ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY (Tables)	12 Months Ended
	Dec. 31, 2023
Receivables [Abstract]
Schedule of Internal Risk-Rating Categories for the Company's Commercial Portfolio	December 31, 2023 2023 2022 2021 2020 2019 Prior Revolving Loans Revolving converted to Term Total (1) (Dollars in thousands) Commercial and Pass $ 329,892 $ 165,003 $ 86,982 $ 64,483 $ 45,867 $ 110,135 $ 692,918 $ 90 $ 1,495,370 Special Mention 4,188 668 528 9,358 22 121 28,218 — 43,103 Substandard 1,867 1,329 902 110 917 3,660 32,728 — 41,513 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial and industrial $ 335,947 $ 167,000 $ 88,412 $ 73,951 $ 46,806 $ 113,916 $ 753,864 $ 90 $ 1,579,986 Current-period gross write-offs $ — $ 91 $ — $ — $ — $ 34 $ 23,439 $ — $ 23,564 Commercial real estate Pass $ 1,116,730 $ 1,197,017 $ 1,300,140 $ 1,276,967 $ 592,058 $ 2,078,644 $ 79,360 $ 3,359 $ 7,644,275 Special Mention 62,337 37,510 51,555 13,269 1,859 118,526 — — 285,056 Substandard 37,302 18,321 22,844 4,556 7,881 12,923 — — 103,827 Doubtful — — — — 8,350 — — — 8,350 Loss — — — — — — — — — Total commercial real estate $ 1,216,369 $ 1,252,848 $ 1,374,539 $ 1,294,792 $ 610,148 $ 2,210,093 $ 79,360 $ 3,359 $ 8,041,508 Current-period gross write-offs $ — $ 5,072 $ — $ — $ 2,783 $ — $ — $ — $ 7,855 Commercial construction Pass $ 180,045 $ 381,352 $ 127,431 $ 44,953 $ 23,823 $ 1,561 $ 17,503 $ — $ 776,668 Special Mention 12,106 — 5,292 — — — — — 17,398 Substandard 10,955 26,146 18,419 — — — — — 55,520 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial construction $ 203,106 $ 407,498 $ 151,142 $ 44,953 $ 23,823 $ 1,561 $ 17,503 $ — $ 849,586 Current-period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Small business Pass $ 50,734 $ 51,157 $ 39,435 $ 25,643 $ 12,944 $ 22,412 $ 46,130 $ — $ 248,455 Special Mention — — — 154 — 184 314 — 652 Substandard 530 282 90 475 — 669 803 — 2,849 Doubtful — — — — — — — — — Loss — — — — — — — — — Total small business $ 51,264 $ 51,439 $ 39,525 $ 26,272 $ 12,944 $ 23,265 $ 47,247 $ — $ 251,956 Current-period gross write-offs $ — $ — $ 54 $ 40 $ — $ — $ 390 $ — $ 484 Residential real estate Pass $ 505,517 $ 638,223 $ 405,386 $ 184,833 $ 88,473 $ 598,562 $ — $ — $ 2,420,994 Default — — — — 854 2,906 — — 3,760 Total residential real estate $ 505,517 $ 638,223 $ 405,386 $ 184,833 $ 89,327 $ 601,468 $ — $ — $ 2,424,754 Current-period gross write-offs $ — $ — $ — $ — $ — $ — $ — $ — $ — Home equity Pass $ 28,903 $ 38,401 $ 54,944 $ 49,803 $ 29,103 $ 121,286 $ 770,074 $ 4,583 $ 1,097,097 Default — — — — — 63 324 142 529 Total home equity $ 28,903 $ 38,401 $ 54,944 $ 49,803 $ 29,103 $ 121,349 $ 770,398 $ 4,725 $ 1,097,626 Current-period gross write-offs $ — $ — $ — $ — $ — $ — $ 47 $ — $ 47 Other consumer (2) Pass $ 639 $ 263 $ 1,178 $ 706 $ 256 $ 1,835 $ 27,769 $ — $ 32,646 Default — — — — 1 — 7 — 8 Total other consumer $ 639 $ 263 $ 1,178 $ 706 $ 257 $ 1,835 $ 27,776 $ — $ 32,654 Current-period gross write-offs $ 2,766 $ — $ — $ — $ — $ 49 $ 17 $ — $ 2,832 Total $ 2,341,745 $ 2,555,672 $ 2,115,126 $ 1,675,310 $ 812,408 $ 3,073,487 $ 1,696,148 $ 8,174 $ 14,278,070 Total current-period gross write-offs $ 2,766 $ 5,163 $ 54 $ 40 $ 2,783 $ 83 $ 23,893 $ — $ 34,782 December 31, 2022 2022 2021 2020 2019 2018 Prior Revolving Loans Revolving converted to Term Total (1) (Dollars in thousands) Commercial and Pass $ 350,036 $ 137,832 $ 113,020 $ 59,936 $ 79,391 $ 18,197 $ 815,128 $ 3,165 $ 1,576,705 Special Mention 4,836 925 1,023 1,744 467 623 17,122 — 26,740 Substandard 2,389 1,681 180 618 — — 3,623 — 8,491 Doubtful — — — — — — 23,167 — 23,167 Loss — — — — — — — — — Total commercial and industrial $ 357,261 $ 140,438 $ 114,223 $ 62,298 $ 79,858 $ 18,820 $ 859,040 $ 3,165 $ 1,635,103 Commercial real estate Pass $ 1,277,333 $ 1,487,333 $ 1,213,984 $ 723,794 $ 696,166 $ 1,833,099 $ 44,477 $ 669 $ 7,276,855 Special Mention 42,005 65,603 39,740 14,167 58,190 183,468 — — 403,173 Substandard 42,629 3,843 4,774 4,066 3,553 21,162 — — 80,027 Doubtful — — — — — 175 — — 175 Loss — — — — — — — — — Total commercial real estate $ 1,361,967 $ 1,556,779 $ 1,258,498 $ 742,027 $ 757,909 $ 2,037,904 $ 44,477 $ 669 $ 7,760,230 Commercial construction Pass $ 504,932 $ 327,194 $ 169,838 $ 56,693 $ 3,135 $ 1,588 $ 23,122 $ 951 $ 1,087,453 Special Mention 33,000 1,775 3,347 — — — — — 38,122 Substandard 18,980 9,858 — — — — — — 28,838 Doubtful — — — — — — — — — Loss — — — — — — — — — Total commercial construction $ 556,912 $ 338,827 $ 173,185 $ 56,693 $ 3,135 $ 1,588 $ 23,122 $ 951 $ 1,154,413 Small business Pass $ 54,876 $ 44,811 $ 31,051 $ 16,588 $ 9,882 $ 18,891 $ 39,434 $ — $ 215,533 Special Mention — 152 373 366 191 117 686 — 1,885 Substandard 139 98 417 — — 401 629 — 1,684 Doubtful — — — — — — — — — Loss — — — — — — — — — Total small business $ 55,015 $ 45,061 $ 31,841 $ 16,954 $ 10,073 $ 19,409 $ 40,749 $ — $ 219,102 Residential real estate Pass $ 665,407 $ 419,665 $ 193,886 $ 94,065 $ 94,425 $ 565,246 $ — $ — $ 2,032,694 Default — — 729 158 — 1,943 — — 2,830 Total residential real estate $ 665,407 $ 419,665 $ 194,615 $ 94,223 $ 94,425 $ 567,189 $ — $ — $ 2,035,524 Home equity Pass $ 43,917 $ 60,103 $ 54,802 $ 32,014 $ 26,414 $ 118,367 $ 748,294 $ 3,874 $ 1,087,785 Default — — — 122 — 83 760 — 965 Total home equity $ 43,917 $ 60,103 $ 54,802 $ 32,136 $ 26,414 $ 118,450 $ 749,054 $ 3,874 $ 1,088,750 Other consumer (2) Pass $ 677 $ 2,013 $ 1,619 $ 1,022 $ 231 $ 3,023 $ 26,939 $ — $ 35,524 Default — — — 18 — 11 — — 29 Total other consumer $ 677 $ 2,013 $ 1,619 $ 1,040 $ 231 $ 3,034 $ 26,939 $ — $ 35,553 Total $ 3,041,156 $ 2,562,886 $ 1,828,783 $ 1,005,371 $ 972,045 $ 2,766,394 $ 1,743,381 $ 8,659 $ 13,928,675 (1) Loans origination dates in the tables above reflect the original date, or the date of a material modification of a previously originated loan, for both organic originations and acquired loans. (2) Other consumer portfolio is inclusive of deposit account overdrafts recorded as loan balances and the associated gross write-offs.
Financing Receivable Credit Quality Indicators for Consumer and Residential Portfolio's	December 31 December 31 Residential portfolio FICO score (re-scored)(1) 754 753 LTV (re-valued)(2) 59.8 % 57.0 % Home equity portfolio FICO score (re-scored)(1) 770 771 LTV (re-valued)(2)(3) 43.3 % 41.3 % (1) The average FICO scores at December 31, 2023 are based upon rescores from December 2023, as available for previously originated loans, or origination score data for loans booked in December 2023. The average FICO scores at December 31, 2022 were based upon rescores from December 2022, as available for previously originated loans, or origination score data for loans booked in December 2022. (2) The combined LTV ratios for December 31, 2023 are based upon updated automated valuations as of November 2023, when available, and/or the most current valuation data available. The combined LTV ratios for December 31, 2022 were based upon updated automated valuations as of November 2022, when available, and/or the most current valuation data available as of such date. The updated automated valuations provide new information on loans that may be available since the previous valuation was obtained. If no new information is available, the valuation will default to the previously obtained data or most recent appraisal. (3) For home equity loans and lines in a subordinate lien, the LTV data represents a combined LTV, taking into account the senior lien data for loans and lines.
Financing Receivable, Nonaccrual	The following table shows information regarding nonaccrual loans at the dates indicated: Nonaccrual Balances December 31, 2023 December 31, 2022 With Allowance for Credit Losses Without Allowance for Credit Losses (2) Total With Allowance for Credit Losses Without Allowance for Credit Losses (2) Total (1) (Dollars in thousands) Commercial and industrial $ 19,890 $ 298 $ 20,188 $ 26,395 $ 298 $ 26,693 Commercial real estate 11,911 11,041 22,952 12,961 2,769 15,730 Small business 394 4 398 99 5 104 Residential real estate 7,634 — 7,634 8,479 — 8,479 Home equity 3,171 — 3,171 3,400 — 3,400 Other consumer 40 — 40 475 — 475 Total nonaccrual loans $ 43,040 $ 11,343 $ 54,383 $ 51,809 $ 3,072 $ 54,881 (1) Nonaccrual balances at December 31, 2022 included $11.5 million of nonaccruing TDRs. (2) Nonaccrual balances reported above without an allowance for credit losses are attributable to loans evaluated on an individual basis where it was determined that there was no risk of loss due to sufficient underlying collateral values.
Schedule of the Age Analysis of Past Due Financing Receivables	The following tables show the age analysis of past due financing receivables at the dates indicated: December 31, 2023 30-59 days 60-89 days 90 days or more Total Past Due Total Number Principal Number Principal Number Principal Number Principal Current (Dollars in thousands) Commercial and industrial 6 $ 398 1 $ 17,538 2 $ 673 9 $ 18,609 $ 1,561,377 $ 1,579,986 Commercial real estate 8 14,674 2 8,419 3 7,279 13 30,372 8,011,136 8,041,508 Commercial construction — — — — — — — — 849,586 849,586 Small business 6 400 1 20 6 243 13 663 251,293 251,956 Residential real estate 24 6,216 7 2,187 13 1,573 44 9,976 2,414,778 2,424,754 Home equity 23 1,640 4 1,238 10 529 37 3,407 1,094,219 1,097,626 Other consumer (1) 413 288 14 31 6 8 433 327 32,327 32,654 Total 480 $ 23,616 29 $ 29,433 40 $ 10,305 549 $ 63,354 $ 14,214,716 $ 14,278,070 December 31, 2022 30-59 days 60-89 days 90 days or more Total Past Due Total Number Principal Number Principal Number Principal Number Principal Current (Dollars in thousands) Commercial and industrial 3 $ 49 1 $ 175 3 $ 23,726 7 $ 23,950 $ 1,611,153 $ 1,635,103 Commercial real estate 7 2,052 5 4,971 3 2,977 15 10,000 7,750,230 7,760,230 Commercial construction — — — — — — — — 1,154,413 1,154,413 Small business 12 111 3 25 3 5 18 141 218,961 219,102 Residential real estate 8 1,654 8 1,105 16 1,725 32 4,484 2,031,040 2,035,524 Home equity 19 1,647 3 201 17 965 39 2,813 1,085,937 1,088,750 Other consumer (1) 432 421 15 83 4 28 451 532 35,021 35,553 Total 481 $ 5,934 35 $ 6,560 46 $ 29,426 562 $ 41,920 $ 13,886,755 $ 13,928,675 (1) Other consumer portfolio is inclusive of deposit account overdrafts recorded as loan balances. (2) The amount of net deferred costs on originated loans included in the ending balance was $6.4 million at December 31, 2023, compared to net deferred fees of $5.0 million at December 31, 2022. Net unamortized discounts on acquired loans included in the ending balance was $8.6 million and $10.4 million at December 31, 2023 and 2022, respectively.
Schedule of Troubled Debt Restructuring and Other Pertinent Information	: Year Ended December 31, 2023 Term Extension Amortized Cost Basis % of Total Class of Financing Receivable (Dollars in thousands) Commercial and industrial $ 11,010 0.70% Commercial real estate 17,530 0.22% Small business 208 0.08% Total $ 28,748 Combination - Interest Rate Reduction and Term Extension Amortized Cost Basis % of Total Class of Financing Receivable (Dollars in thousands) Commercial and industrial $ 85 0.01% Small business $ 38 0.02% Total $ 123 Combination - Term Extension and Other-Than-Insignificant Payment Delay Amortized Cost Basis % of Total Class of Financing Receivable (Dollars in thousands) Commercial and industrial $ 1,865 0.12% Commercial real estate 6,505 0.08% Total $ 8,370 The following table describes the financial effect of the modifications made to borrowers experiencing financial difficulty for the year ended December 31, 2023: Term Extension Financial Effect Commercial and industrial Added a weighted-average contractual term of 2 months to the life of the loans Commercial real estate Added a weighted-average contractual term of 1.9 years to the life of the loans Small business Added a weighted-average contractual term of 4.7 years to the life of the loans Interest Rate Reduction Financial Effect Commercial and industrial Reduced contractual rate on one loan from 10.00% to 7.00% Small business Reduced contractual rate on one loan from 10.00% to 6.50%
Schedule of Post-Modification Balance of Troubled Debt Restructuring by Type of Modification
Financing Receivable, Modified, Past Due	The following table depicts the amortized cost and payment status of loans that have been modified in the last 12 months as of December 31, 2023: Current (1) 30-89 Days Past Due 90+ Days Past Due Total (Dollars in thousands) Commercial and industrial $ 12,585 $ — $ 375 $ 12,960 Commercial real estate 23,899 — 136 24,035 Small business 246 — — 246 Total $ 36,730 $ — $ 511 $ 37,241 (1) Current category is inclusive of $8.4 million in nonaccrual loans which have yet to reach the six consecutive months of performance required to return to accruing status in accordance with the Company's accounting policy for nonaccrual loans
Foreclosed Residential Real Estate Property	The following table shows information regarding foreclosed residential real estate property at the dates indicated: December 31, 2023 December 31, 2022 (Dollars in thousands) Foreclosed residential real estate property held by the creditor $ 110 $ — Recorded investment in mortgage loans collateralized by residential real estate property that are in the process of foreclosure $ 1,697 $ 1,615
Schedule of Debtor Troubled Debt Restructuring, Subsequent Periods [Table Text Block]	(Dollars in thousands) TDRs on accrual status $ 11,278 TDRs on nonaccrual 11,520 Total TDRs $ 22,798 Additional commitments to lend to a borrower who has been a party to a TDR $ 64 The following table shows the troubled debt restructurings which occurred for the periods indicated and the change in the recorded investment subsequent to the modifications occurring: Year Ended December 31, 2022 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (Dollars in thousands) Commercial and industrial 4 $ 3,466 $ 3,465 Commercial real estate 1 7,850 7,850 Total (1) 5 $ 11,316 $ 11,315 Year Ended December 31, 2021 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (Dollars in thousands) Commercial and industrial 1 $ 14,148 $ 14,148 Commercial real estate 5 3,964 3,964 Small business 2 189 189 Total (1) 8 $ 18,301 $ 18,301 (1) The pre-modification and post-modification balances represent the legal principal balance of the loan. Activity presented in the tables above includes $14.3 million of modifications on existing TDRs during the year ended December 31, 2021. The following table shows the Company's post-modification balance of TDR's listed by type of modification for the periods indicated: Year Ended December 31 2022 2021 (Dollars in thousands) Extended maturity $ 11,315 $ 4,153 Combination rate and maturity — 14,148 Total $ 11,315 $ 18,301
Financing Receivable, Modified, Subsequent Default	The table below shows the amortized cost basis of financing receivables modified during the twelve months ended December 31, 2023 that subsequently defaulted: Term Extension Combination - Term Extension and Other Than Insignificant Payment Delay Total (Dollars in thousands) Commercial and industrial $ 374 $ — $ 374 Commercial real estate 136 6,505 6,641 Total $ 510 $ 6,505 $ 7,015

BANK PREMISES AND EQUIPMENT (Ta

BANK PREMISES AND EQUIPMENT (Tables)	12 Months Ended
	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
Schedule of Premises and Equipment	Bank premises and equipment at December 31, were as follows: 2023 2022 Estimated (Dollars in thousands) (In years) Cost Land $ 52,844 $ 52,844 n/a Bank premises 99,973 97,760 5-40 Leasehold improvements 50,682 47,098 1-15 Furniture and equipment 102,251 93,450 1-10 Leased equipment 32,654 32,792 5 Total cost 338,404 323,944 Accumulated depreciation (145,355) (127,440) Net bank premises and equipment $ 193,049 $ 196,504

GOODWILL AND IDENTIFIABLE INT_2

GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS (Tables)	12 Months Ended
	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets and Goodwill [Table Text Block]	The following table sets forth the carrying value of goodwill and other intangible assets, net of accumulated amortization, at December 31: 2023 2022 (Dollars in thousands) Balances not subject to amortization Goodwill $ 985,072 $ 985,072 Balances subject to amortization Core deposit intangibles 15,237 20,757 Other intangible assets 2,953 4,311 Total other intangible assets 18,190 25,068 Total goodwill and other intangible assets $ 1,003,262 $ 1,010,140
Schedule of Goodwill	The changes in the carrying value of goodwill for the periods indicated were as follows: 2023 2022 2021 (Dollars in thousands) Balance at beginning of year $ 985,072 $ 985,072 $ 506,206 Acquisitions — — 478,866 Balance at end of year $ 985,072 $ 985,072 985,072
Schedule of Other Intangible Assets	The gross carrying amount and accumulated amortization of other intangible assets were as follows at the dates indicated: December 31 2023 2022 Gross Accumulated Net Gross Accumulated Net (Dollars in thousands) Core deposit intangibles $ 46,770 $ (31,533) $ 15,237 $ 46,770 $ (26,013) $ 20,757 Other intangible assets 6,100 (3,147) 2,953 6,100 (1,789) 4,311 Total $ 52,870 $ (34,680) $ 18,190 $ 52,870 $ (27,802) $ 25,068
Schedule of Intangible Assets Estimated Annual Amortization Expense	The following table sets forth the estimated annual amortization expense of intangible assets for each of the next five years: Year Amount (Dollars in thousands) 2024 $ 5,905 2025 $ 4,716 2026 $ 2,820 2027 $ 2,077 2028 $ 1,377

DEPOSITS (Tables)

DEPOSITS (Tables)	12 Months Ended
	Dec. 31, 2023
Deposits [Abstract]
Schedule of Time Deposits Maturities	The following is a summary of the scheduled maturities of time deposits at December 31: 2023 2022 (Dollars in thousands) 1 year or less $ 2,056,543 94.3 % $ 953,214 79.7 % Over 1 year to 2 years 97,055 4.4 % 150,102 12.5 % Over 2 years to 3 years 15,594 0.7 % 66,995 5.6 % Over 3 years to 4 years 8,585 0.4 % 15,172 1.3 % Over 4 years to 5 years 3,702 0.2 % 10,258 0.9 % Total (1) $ 2,181,479 100.0 % $ 1,195,741 100.0 % (1)

BORROWINGS (Tables)

BORROWINGS (Tables)	12 Months Ended
	Dec. 31, 2023
Debt Disclosure [Abstract]
Schedule of Federal Home Loan Bank Borrowings	The table below shows the outstanding borrowings December 31, 2023, as well as the contractual rates and effective rates, net of any swap impact: Weighted Average Effective Rate, Total Contractual Net of Outstanding Rate Swap Impact (Dollars in thousands) Overnight Borrowings $ 705,000 5.54 % n/a 1-Month Term 400,000 5.50 % 3.83 % Amortizing 541 1.40 % n/a Total $ 1,105,541
Schedule of Long-term Borrowings	The following table summarizes long-term debt, net of debt issuances costs, at the dates indicated: December 31 2023 2022 (Dollars in thousands) Junior subordinated debentures Capital Trust V 51,517 51,514 Central Trust I 5,258 5,258 Central Trust II 6,083 6,083 Subordinated debentures 49,980 49,885 Total long-term debt $ 112,838 $ 112,740
Information relating to Trust Preferred Securities [Table Text Block]	Information relating to these trust preferred securities at December 31, 2023 is as follows: Trust Principal Amount Maturity Date Credit Spread All-in Rate (Dollars in thousands) Capital Trust V $ 50,000 3/15/2037 1.48% 7.13% Central Trust I (1) $ 5,100 9/16/2034 2.44% 8.09% Central Trust II (1) $ 5,900 3/15/2037 1.65% 7.30%

STOCK BASED COMPENSATION (Table

STOCK BASED COMPENSATION (Tables)	12 Months Ended
	Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]
Schedule of Cumulatively Granted Stock Options and Restricted Stock Awards, Net of Forfeitures and Expirations	The following table presents the amount of cumulatively granted stock option awards and restricted stock awards, net of forfeitures and expirations, granted through December 31, 2023: Authorized Awards Cumulatively Granted, Net of Total Authorized Stock Restricted 2005 Plan 1,650,000 387,258 1,060,821 1,448,079 n/a 2018 Plan 300,000 — 50,767 50,767 249,233 2023 Plan 1,126,886 — 9,640 9,640 1,117,246
Schedule of Pre-tax Compensation Expense and Related Tax Benefits	The following table presents the pre-tax expense associated with stock option and restricted stock awards and the related tax benefits recognized for the periods presented: Years Ended December 31 2023 2022 2021 (Dollars in thousands) Stock based compensation expense Restricted stock awards (1) $ 5,777 $ 3,791 $ 3,580 Directors’ fee expense (2) Restricted stock awards 600 673 729 Total stock based award expense $ 6,377 $ 4,464 $ 4,309 Related tax benefits recognized in earnings $ 1,793 $ 1,255 $ 1,212 (1) Inclusive of compensation expense associated with time-vested and performance-based restricted stock awards. (2) Expense related to awards issued to directors is recognized as directors’ fees within other noninterest expense.
Schedule of Relevant Information Relating to Stock Options	The following table presents relevant information relating to the Company’s stock options for the periods presented: Years Ended December 31 2023 2022 2021 (Dollars in thousands, except per share data) Fair value of stock options vested based on grant date fair value $ — $ — $ — Intrinsic value of stock options exercised $ 139 $ — $ 414 Cash received from stock option exercises $ 257 $ — $ 233 Tax benefit realized on stock option exercises $ 39 $ — $ 116
Schedule of Stock Options	The following table presents a summary of stock option award activity for the year ended December 31, 2023: Outstanding Stock Option Weighted Weighted Aggregate (Dollars in thousands, except per share data) Balance at January 1, 2023 20,000 $ 56.18 Granted — — Exercised (6,666) 38.63 Balance of options outstanding, vested and exercisable at December 31, 2023 13,334 (2) $ 64.94 3.40 years $ 62 (1) The aggregate intrinsic value represents the total pre-tax intrinsic value, based on the average of the high price and low price at which the Company’s common stock traded on December 31, 2023 of $66.57, which would have been received by in-the-money option holders had they all exercised their options as of that date. (2) Represents vested stock options outstanding to Directors. For the year ended December 31, 2023, all outstanding stock option awards are vested and there is no unrecognized compensation expense related to those options.
Schedule of Restricted Stock Granted	During the years ended December 31, 2023, 2022, and 2021 the Company made the following restricted stock award grants: Shares Granted Plan Fair Value Vesting Period Time-vested 2023 2/16/2023 77,525 2005 $ 80.65 Ratably over 3 years from grant date 2/16/2023 12,309 2005 $ 80.65 Ratably over 5 years beginning on February 6, 2023 5/15/2023 1,080 2005 $ 46.21 Ratably over 3 years from grant date 5/23/2023 12,410 2018 $ 48.35 Immediately upon grant date 5/30/2023 890 2023 $ 45.09 Ratably over 3 years from grant date 9/15/2023 5,270 2023 $ 51.44 Ratably over 5 years from grant date 9/15/2023 3,020 2023 $ 51.44 Ratably over 3 years from grant date 12/15/2023 460 2023 $ 66.24 Ratably over 3 years from grant date 2022 2/17/2022 52,100 2005 $ 84.70 Ratably over 5 years from grant date 5/24/2022 8,099 2018 $ 80.39 Immediately upon grant date 9/15/2022 646 2005 $ 77.44 Ratably over 5 years from grant date 2021 2/18/2021 49,550 2005 $ 81.84 Ratably over 5 years from grant date 5/25/2021 7,680 2018 $ 78.18 Immediately upon grant date 9/1/2021 640 2018 $ 76.78 Immediately upon grant date Performance-based 2/16/2023 32,200 2005 $ 80.65 The earlier of: the date on which it is determined if the performance goal has been achieved; or, March 31, 2026. 2/17/2022 20,700 2005 $ 84.70 The earlier of: the date on which it is determined if the performance goal has been achieved; or, March 31, 2025. 2/18/2021 18,900 2005 $ 81.84 The earlier of: the date on which it is determined if the performance goal has been achieved; or, March 31, 2024.
Schedule of Share-based Compensation, Fair Value of Restricted Stock Awards Vesting [Table Text Block]	The following table presents the fair value of restricted stock awards that vested during the periods presented: Years Ended December 31 2023 2022 2021 (Dollars in thousands) Fair value of restricted stock awards upon vesting $ 5,003 $ 5,148 $ 5,754
Schedule of Restricted Stock Awards	The following table presents a summary of restricted stock award activity for the year ended December 31, 2023: Outstanding Restricted Stock Weighted Average Balance at January 1, 2023 191,412 $ 80.15 Granted 145,164 75.70 Vested/released (70,194) 71.94 Forfeited (1) (49,175) 80.93 Balance at December 31, 2023 217,207 (2) $ 79.65 Unrecognized compensation cost (in thousands) (2) $ 10,222 Weighted average remaining recognition period (years) 2.48 years (1) Forfeited amounts are inclusive of 3,220 performance-based shares that were not vested based on performance objective criteria results, and 17,405 performance-based shares that were cancelled based on the departure of certain executives of the Company. (2) There are no unvested restricted stock awards outstanding to Directors and therefore no related unrecognized compensation cost for Directors.

DERIVATIVES AND HEDGING ACTIV_2

DERIVATIVES AND HEDGING ACTIVITIES (Tables)	12 Months Ended
	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Details of derivative positions for interest rate swaps which qualify as hedges for accounting purposes	The following tables reflect information about the Company’s derivative positions at the dates indicated below for interest rate swaps which qualify as cash flow hedges for accounting purposes: December 31, 2023 Weighted Average Rate Notional Amount Weighted Average Maturity Current Pay Fixed Fair Value (in thousands) (in years) (in thousands) Interest rate swaps on borrowings $ 400,000 2.58 5.34 % 3.67 % $ 1,901 Current Rate Paid Receive Fixed Interest rate swaps on loans $ 850,000 2.50 5.36 % 2.72 % $ (27,350) Current Rate Paid Receive Fixed Swap Rate Interest rate collars on loans 350,000 1.48 5.45 % 3.09% - 2.12% (4,714) Total $ 1,600,000 $ (30,163) December 31, 2022 Weighted Average Rate Notional Amount Average Maturity Current Pay Fixed Fair Value (in thousands) (in years) (in thousands) Interest rate swaps on loans 1,050,000 2.97 4.24 % 2.66 % (42,005) Current Rate Paid Receive Fixed Swap Rate Interest rate collars on loans 400,000 2.27 4.22 % 3.09% - 2.19% (10,239) Total $ 1,450,000 $ (52,244)
Summary of customer related derivative positions, not designated as hedging	The following tables reflect the Company’s customer related derivative positions at the dates indicated below for those derivatives not designated as hedging: Number of Notional Amount Maturing Less than 1 year Less than 2 years Less than 3 years Less than 4 years Thereafter Total Fair Value December 31, 2023 (Dollars in thousands) Loan level swaps Receive fixed, pay variable 281 $ 80,682 $ 252,260 $ 223,928 $ 230,513 $ 997,108 $ 1,784,491 $ (88,415) Pay fixed, receive variable 281 80,682 252,260 223,928 230,513 997,108 1,784,491 88,280 Foreign exchange contracts Buys foreign currency, sells U.S. currency 22 65,586 12,957 — — — 78,543 2,197 Buys U.S. currency, sells foreign currency 22 65,586 12,957 — — — 78,543 (2,160) Risk participation agreements Participation out 17 — 24,193 — 13,119 114,027 151,339 200 Participation in 8 — — 13,016 18,989 15,725 47,730 (44) Number of Notional Amount Maturing Less than 1 year Less than 2 years Less than 3 years Less than 4 years Thereafter Total Fair Value December 31, 2022 (Dollars in thousands) Loan level swaps Receive fixed, pay variable 283 $ 80,531 $ 96,613 $ 256,924 $ 193,096 $ 1,016,312 $ 1,643,476 $ (118,930) Pay fixed, receive variable 283 80,531 96,613 256,924 193,096 1,016,312 1,643,476 118,928 Foreign exchange contracts Buys foreign currency, sells U.S. currency 49 124,982 13,363 — — — 138,345 306 Buys U.S. currency, sells foreign currency 49 124,982 13,363 — — — 138,345 (232) Risk participation agreements Participation out 13 2,595 — 24,538 — 95,514 122,647 161 Participation in 6 27,365 — — — 25,849 53,214 (15) (1) The Company may enter into one dealer swap agreement which offsets multiple commercial borrower swap agreements.
Fair value of derivative financial instruments as well as their classification on the balance sheet	Asset Derivatives (1) Liability Derivatives (2) Fair Value at Fair Value at Fair Value at Fair Value at December 31, 2023 December 31, 2022 December 31, 2023 December 31, 2022 (Dollars in thousands) Derivatives designated as hedges Interest rate derivatives $ 1,927 (3) $ — (3) $ 32,090 (4) $ 52,244 (4) Derivatives not designated as hedges Customer Related Positions: Loan level derivatives 99,416 (3) 123,372 (3) 99,551 (4) 123,374 (4) Foreign exchange contracts 2,220 4,352 2,183 4,278 Risk participation agreements 200 161 44 15 Mortgage Derivatives Interest rate lock commitments 168 43 — — Forward sale loan commitments 17 30 — — Total derivatives not designated as hedges 102,021 127,958 101,778 127,667 Total 103,948 127,958 133,868 179,911 Netting Adjustments (5) (48,253) (57,784) 25,360 33,245 Net Derivatives on the Balance Sheet 55,695 70,174 108,508 146,666 Financial instruments (6) 12,018 20,019 12,018 20,019 Cash collateral pledged (received) (17,076) (17,720) — — Net Derivative Amounts $ 26,601 $ 32,435 $ 96,490 $ 126,647 (1) All asset derivatives are located in other assets on the balance sheet. (2) All liability derivatives are located in other liabilities on the balance sheet. (3) As of December 31, 2023, approximately $316,000 and $3.0 million of accrued interest receivable is included in the fair value of interest rate and loan level derivative assets, respectively. Accrued interest receivable of approximately $2.2 million is included in the fair value of loan level derivative assets at December 31, 2022. (4) Approximately $1.9 million and $3.0 million of accrued interest payable is included in the fair value of interest rate and loan level derivative liabilities, respectively, at December 31, 2023, in comparison to accrued interest payable of approximately $1.3 million and $2.2 million, respectively, at December 31, 2022. (5) Netting adjustments represent the amounts recorded to convert derivative assets and liabilities cleared through CME from a gross basis to a net basis, inclusive of the variation margin payments, in accordance with applicable accounting guidance. (6) Reflects offsetting derivative positions with the same counterparty that are not netted on the balance sheet.
Effect of derivative financial instruments included in OCI and current earnings	The table below presents the effect of the Company’s derivative financial instruments included in OCI and current earnings for the periods indicated: Years Ended December 31 2023 2022 2021 (Dollars in thousands) Derivatives designated as hedges Gain (loss) in OCI on derivatives (effective portion), net of tax $ 16,055 $ (50,767) $ (19,139) (Loss) gain reclassified from OCI into interest income or interest expense (effective portion) $ (27,414) $ 5,054 $ 18,691 Derivatives not designated as hedges Changes in fair value of customer related positions Other income $ 517 $ 260 $ 217 Other expenses (679) (268) (405) Changes in fair value of mortgage derivatives Mortgage banking income 112 (679) (4,725) Total $ (50) $ (687) $ (4,913)

INCOME TAXES (Tables)

INCOME TAXES (Tables)	12 Months Ended
	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Schedule of Components of Income Taxes	The provision for income taxes is comprised of the following components: Years Ended December 31 2023 2022 2021 (Dollars in thousands) Current expense Federal $ 51,771 $ 60,216 $ 21,539 State 21,123 24,979 11,054 Total current expense 72,894 85,195 32,593 Deferred expense (benefit) Federal 1,336 (970) 3,032 State 1,402 (284) 58 Total deferred expense (benefit) 2,738 (1,254) 3,090 Total expense $ 75,632 $ 83,941 $ 35,683
Schedule of Income Tax Rate Reconciliation	The difference between the statutory federal income tax rate and the effective income tax rate reported for the last three years is detailed below: Years Ended December 31 2023 2022 2021 (Dollars in thousands) Computed statutory federal income tax provision $ 66,178 21.00 % $ 73,028 21.00 % $ 32,902 21.00 % State taxes, net of federal tax benefit 17,992 5.71 % 19,728 5.67 % 8,754 5.59 % Low Income Housing Project Investments (3,740) (1.19) % (3,364) (0.97) % (2,308) (1.47) % Nontaxable interest, net (3,508) (1.11) % (3,191) (0.92) % (1,022) (0.65) % Increase in cash surrender value of life insurance (2,133) (0.68) % (1,885) (0.54) % (1,405) (0.90) % Increase (decrease) in uncertain positions (655) (0.21) % (1,035) (0.30) % 50 0.03 % Revaluation of net deferred tax assets 255 0.08 % — — % — — % Stock-based compensation (127) (0.04) % (202) (0.06) % (372) (0.24) % Change in valuation allowance 109 0.03 % 52 0.01 % 26 0.02 % Other tax credits (76) (0.02) % — — % — — % Merger and other related costs (non-deductible) — — % — — % 630 0.40 % Other, net 1,337 0.43 % 810 0.25 % (1,572) (1.00) % Total expense $ 75,632 24.00 % $ 83,941 24.14 % $ 35,683 22.78 %
Schedule of Net Deferred Tax Asset	The tax-effected components of the net deferred tax asset at December 31 of the years presented were as follows: 2023 2022 (Dollars in thousands) Deferred tax assets Accrued expenses not deducted for tax purposes $ 14,646 $ 16,162 Allowance for credit losses 38,774 42,748 Derivatives fair value adjustment 7,825 14,328 Employee and director equity compensation 1,660 1,388 Foreign Tax Credit Carryforward 89 89 Loan basis difference fair value adjustment 1,811 2,273 Net operating loss carry-forward 633 606 Net unrealized loss on securities available for sale 29,536 38,968 Operating lease liability 15,387 17,069 Other 587 791 Gross deferred tax assets $ 110,948 $ 134,422 Valuation allowance (467) (358) Total deferred tax assets net of valuation allowance $ 110,481 $ 134,064 Deferred tax liabilities Core deposit and other intangibles $ 2,865 $ 4,137 Deferred loan fees, net 8,160 8,281 Derivatives fair value adjustment — — Fixed assets 16,606 18,132 Goodwill 11,291 11,432 Prepaid pension 3,482 3,469 Right of use asset 14,781 16,565 Other 1,884 2,112 Gross deferred tax liabilities $ 59,069 $ 64,128 Total net deferred tax asset $ 51,412 $ 69,936
Reconciliation of Unrecognized Tax Benefits	The Company accounts for uncertainties in income taxes by providing a tax reserve for certain positions. The following is a reconciliation of the beginning and ending amount of unrecognized tax benefits: (Dollars in thousands) Balance at December 31, 2020 $ 474 Reduction of tax positions for prior years $ (29) Increase for current year tax positions $ 2,433 Balance at December 31, 2021 $ 2,878 Reduction of tax positions for prior years (1,047) Increase for prior year tax position 128 Increase for current year tax positions 761 Balance at December 31, 2022 2,720 Reduction of tax positions for prior years (959) Balance at December 31, 2023 $ 1,761
Schedule of changes in accrued interest and penalties related to uncertain tax positions	The following table summarizes the changes in accrued interest and penalties related to uncertain tax positions for the periods presented: As of December 31 2023 2022 2021 (Dollars in thousands) Beginning Balance $ 585 $ 920 $ 95 Expense (benefit) recognized in provision for income taxes 104 (335) 69 Acquired obligation for interest and penalties (1) — — 756 Ending Balance $ 689 $ 585 $ 920

LOW INCOME HOUSING PROJECT IN_2

LOW INCOME HOUSING PROJECT INVESTMENTS Low Income Housing Project Investments (Tables)	12 Months Ended
	Dec. 31, 2023
Low Income Housing Project Investments [Abstract]
Investments in Low Income Housing Projects [Table Text Block]	The following table presents certain information related to the Company's investments in low income housing projects as of December 31 of the years presented: 2023 2022 2021 (Dollars in thousands) Original investment value $ 229,015 $ 197,124 $ 179,481 Current recorded investment 156,984 139,454 135,497 Unfunded liability obligation 58,731 57,913 73,336 Tax credits and benefits earned during the year 18,101 17,011 14,198 Amortization of investments during the year 14,360 13,647 11,892 Net income tax benefit recognized during the year 3,740 3,364 2,306

EMPLOYEE BENEFIT PLANS (Tables)

EMPLOYEE BENEFIT PLANS (Tables)	12 Months Ended
	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Schedule of Expected Benefit Payments [Table Text Block]	stimated future benefit payments for the BHB Plan. These payments were calculated prior to the approval of the BHB Plan's termination. Amount (Dollars in thousands) 2024 $ 509 2025 $ 461 2026 $ 462 2027 $ 490 2028 $ 483 2029-2033 $ 2,600 Expected future benefit payments for the defined benefit supplemental executive retirement plans are presented below: Defined Benefit Supplemental Executive (Dollars in thousands) 2024 $ 1,277 2025 $ 1,094 2026 $ 1,091 2027 $ 1,060 2028 $ 1,047 2029-2033 $ 5,685
Schedule of Multiemployer Plan	Funding Status FIP/RP Status Surcharge Expiration Minimum EIN/Pension 2023 2022 Pentegra defined benefit plan for financial institutions 13-5645888/333 At least 80 percent At least 80 percent No No N/A $ —
Schedule of Multiemployer Plan Contributions	The Company’s contributions to the Pension Plans were as follows for the periods indicated: Required Contributions - Plan Year Allocation Contribution 2023-2024 2022-2023 2021-2022 (Dollars in thousands) 2023 $ 476 $ 476 $ — $ — 2022 $ 499 $ — $ 499 $ — 2021 $ 626 $ — $ — $ 626
Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block]	Information pertaining to the BHB Plan is as follows: Years Ended December 31 2023 2022 2021 (Dollars in thousands) Change in plan assets: Fair value of plan assets at beginning of year $ 9,889 $ 14,099 $ 12,225 Actual return on plan assets 509 (2,126) 1,480 Employer contribution — — 950 Benefits paid (766) (2,084) (556) Fair value of plan assets at end of year $ 9,632 $ 9,889 $ 14,099 Change in benefit obligation: Benefit obligation at beginning of year 8,716 13,939 15,052 Interest cost 420 366 344 Actuarial loss (gain) 15 (3,505) (901) Benefits paid (766) (2,084) (556) Benefit obligation at end of year $ 8,385 $ 8,716 $ 13,939 Funded status at end of year $ 1,247 $ 1,173 $ 160
Schedule of Net Benefit Costs [Table Text Block]	Years Ended December 31 2023 2022 2021 (Dollars in thousands) Interest cost $ 420 $ 366 $ 344 Expected return on plan assets (144) (966) (891) Amortization of net actuarial (gain) loss (17) 28 208 Settlement gain (25) (31) — Net period pension expense (benefit) $ 234 $ (603) $ (339)
Defined Benefit Plan, Plan Assets, Allocation [Table Text Block]	The key assumptions used to determine net periodic pension expense (benefit) are as follows: Years Ended December 31 2023 2022 2021 Discount rate 4.97 % 2.68 % 2.35 % Expected long-term rate of return on plan assets 1.50 % 7.00 % 7.00 %
Schedule of Supplemental Retirement Expense and Contributions Paid	The following table shows the defined benefit supplemental retirement expense, and the contributions paid to the plans which were used only to pay the current year benefits for the years indicated: 2023 2022 2021 (Dollars in thousands) Retirement expense $ 703 $ 1,681 $ 2,275 Benefits paid $ 450 $ 475 $ 475
Schedule of Supplemental Executive Retirement Plans	The following table illustrates the status of the defined benefit supplemental executive retirement plans at December 31 for the years presented: Defined Benefit Supplemental Executive 2023 2022 2021 (Dollars in thousands) Change in accumulated benefit obligation Benefit obligation at beginning of year $ 15,711 $ 19,498 $ 20,752 Service cost 380 561 574 Interest cost 761 492 424 Actuarial gain (8) (4,365) (1,777) Benefits paid (450) (475) (475) Benefit obligation at end of year $ 16,394 $ 15,711 $ 19,498 Change in plan assets Fair value of plan assets at beginning of year $ — $ — $ — Employer contribution 450 475 475 Benefits paid (450) (475) (475) Fair value of plan assets at end of year $ — $ — $ — Funded status at end of year $ (16,394) $ (15,711) $ (19,498) Assets — — — Liabilities (16,394) (15,711) (19,498) Funded status at end of year $ (16,394) $ (15,711) $ (19,498) Amounts recognized in accumulated other comprehensive income ("AOCI") Net (gain) loss $ (1,518) $ (1,970) $ 3,002 Prior service cost — 22 43 Amounts recognized in AOCI $ (1,518) $ (1,948) $ 3,045 Information for plans with an accumulated benefit obligation in excess of plan assets Projected benefit obligation $ 16,394 $ 15,711 $ 19,498 Accumulated benefit obligation $ 16,394 $ 15,711 $ 19,498 Net periodic benefit cost Service cost $ 380 $ 561 $ 574 Interest cost 761 492 424 Amortization of prior service cost 22 22 174 Recognized net actuarial (gain) loss (460) 606 1,103 Net periodic benefit cost $ 703 $ 1,681 $ 2,275 Discount rate used for benefit obligation 4.62% - 4.75% 4.67% - 4.93% 1.28% - 2.57% Discount rate used for net periodic benefit cost 4.67% - 4.93% 1.28% - 2.57% 0.43% - 2.18% Rate of compensation increase n/a n/a n/a

FAIR VALUE MEASUREMENTS (Tables

FAIR VALUE MEASUREMENTS (Tables)	12 Months Ended
	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Fair Value, Assets Measured on Recurring and Nonrecurring Basis	Assets and liabilities measured at fair value on a recurring and nonrecurring basis were as follows at the dates indicated: Fair Value Measurements at Reporting Date Using Balance Quoted Significant Other Significant December 31, 2023 (Dollars in thousands) Recurring fair value measurements Assets Trading securities $ 4,987 $ 4,987 $ — $ — Equity securities 22,510 22,510 — — Securities available for sale U.S. government agency securities 207,138 — 207,138 — U.S. treasury securities 769,102 — 769,102 — Agency mortgage-backed securities 277,047 — 277,047 — Agency collateralized mortgage obligations 33,189 — 33,189 — State, county, and municipal securities 190 — 190 — Pooled trust preferred securities issued by banks and insurers 1,018 — 1,018 — Small business administration pooled securities 46,572 — 46,572 — Loans held for sale 6,368 — 6,368 — Derivative instruments 103,948 — 103,948 — Liabilities Derivative instruments 133,868 — 133,868 — Total recurring fair value measurements, net $ 1,338,201 $ 27,497 $ 1,310,704 $ — Nonrecurring fair value measurements Assets Individually assessed collateral dependent loans (1) $ 28,881 $ — $ — $ 28,881 Total nonrecurring fair value measurements $ 28,881 $ — $ — $ 28,881 Fair Value Measurements at Reporting Date Using Balance Quoted Significant Other Significant December 31, 2022 (Dollars in thousands) Recurring fair value measurements Assets Trading securities $ 3,888 $ 3,888 $ — $ — Equity securities 21,119 21,119 — — Securities available for sale U.S. government agency securities 202,300 — 202,300 — U.S. treasury securities 791,341 — 791,341 — Agency mortgage-backed securities 313,688 — 313,688 — Agency collateralized mortgage obligations 38,843 — 38,843 — State, county, and municipal securities 191 — 191 — Pooled trust preferred securities issued by banks and insurers 1,034 — 1,034 — Small business administration pooled securities 51,757 — 51,757 — Loans held for sale 2,803 — 2,803 — Derivative instruments 127,958 — 127,958 — Liabilities Derivative instruments 179,911 — 179,911 — Total recurring fair value measurements, net $ 1,375,011 $ 25,007 $ 1,350,004 $ — Nonrecurring fair value measurements Assets Individually assessed collateral dependent loans (1) $ 16,092 $ — $ — $ 16,092 Total nonrecurring fair value measurements $ 16,092 $ — $ — $ 16,092 (1) The carrying value of individually assessed collateral dependent loans is based on the lower of amortized cost or fair value of the underlying collateral less costs to sell. The fair value of the underlying collateral is generally determined through independent appraisals, which generally include various Level 3 inputs which are not identifiable. Appraisals may be adjusted by management for qualitative factors such as economic factors and estimated liquidation expenses. The range of these possible adjustments may vary.
Schedule of Fair Values and Related Carrying Amounts by Balance Sheet Grouping	The estimated fair values and related carrying amounts for assets and liabilities for which fair value is only disclosed are shown below at the dates indicated: Fair Value Measurements at Reporting Date Using Carrying Value Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) December 31, 2023 (Dollars in thousands) Financial assets Securities held to maturity (a) U.S. government agency securities $ 29,521 $ 28,408 $ — $ 28,408 $ — U.S. treasury securities 100,712 91,535 — 91,535 — Agency mortgage-backed securities 829,431 763,728 — 763,728 — Agency collateralized mortgage obligations 477,517 407,911 — 407,911 — Single issuer trust preferred securities issued by banks 1,500 1,373 — 1,373 — Small business administration pooled securities 130,426 124,653 — 124,653 — Loans, net of allowance for credit losses (b) 14,106,967 13,079,368 — — 13,079,368 Federal Home Loan Bank stock (c) 43,557 43,557 — 43,557 — Cash surrender value of life insurance policies (d) 297,387 297,387 — 297,387 — Financial liabilities Deposit liabilities, other than time deposits (e) $ 12,684,068 $ 12,684,068 $ — $ 12,684,068 $ — Time certificates of deposits (f) 2,181,479 2,166,573 — 2,166,573 — Federal Home Loan Bank borrowings (f) 1,105,541 1,103,845 — 1,103,845 — Junior subordinated debentures (g) 62,858 58,911 — 58,911 — Subordinated debentures (f) 49,980 49,613 — — 49,613 Fair Value Measurements at Reporting Date Using Carrying Value Fair Value Quoted Prices in Active Markets for Identical Assets Significant Other Significant December 31, 2022 Financial assets (Dollars in thousands) Securities held to maturity (a) U.S. government agency securities $ 31,258 $ 29,036 $ — $ 29,036 $ — U.S. treasury securities 100,634 88,879 $ — 88,879 — Agency mortgage-backed securities 898,927 815,952 — 815,952 — Agency collateralized mortgage obligations 535,971 458,417 — 458,417 — Single issuer trust preferred securities issued by banks 1,500 1,508 — 1,508 — Small business administration pooled securities 136,830 130,918 — 130,918 — Loans, net of allowance for loan losses (b) 13,760,164 13,260,873 — — 13,260,873 Federal Home Loan Bank stock (c) 5,218 5,218 — 5,218 — Cash surrender value of life insurance policies (d) 293,323 293,323 — 293,323 — Financial liabilities Deposit liabilities, other than time deposits (e) $ 14,683,266 $ 14,683,266 $ — $ 14,683,266 $ — Time certificates of deposits (f) 1,195,741 1,164,892 — 1,164,892 — Federal Home Loan Bank borrowings (f) 637 563 — 563 — Junior subordinated debentures (g) 62,855 60,002 — 60,002 — Subordinated debentures (f) 49,885 45,891 — — 45,891 (a) The fair values presented are based on quoted market prices, where available. If quoted market prices are not available, fair values are based on quoted market prices of comparable instruments and/or discounted cash flow analysis. (b) Fair value of loans is measured using the exit price valuation method, determined primarily by discounting the future cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities or cash flows, while incorporating liquidity and credit assumptions. Additionally, this amount excludes individually assessed collateral dependent loans, which are deemed to be marked to fair value on a nonrecurring basis. (c) Federal Home Loan Bank stock has no quoted market value and is carried at cost, therefore the carrying amount approximates fair value. (d) Cash surrender value of life insurance is recorded at its cash surrender value (or the amount that can be realized upon surrender of the policy), therefore, carrying amount approximates fair value. (e) Fair value of demand deposits, savings and interest checking accounts and money market deposits is the amount payable on demand at the reporting date. (f) Fair value was determined by discounting anticipated future cash payments using rates currently available for instruments with similar remaining maturities. (g) Fair value was determined based upon market prices of securities with similar terms and maturities.

REVENUE RECOGNITION (Tables)

REVENUE RECOGNITION (Tables)	12 Months Ended
	Dec. 31, 2023
Revenue Recognition [Abstract]
Disaggregation of Revenue [Table Text Block]	The following table presents the revenue streams that the Company has disaggregated for the periods indicated: Years Ended December 31 2023 2022 2021 (Dollars in thousands) Deposit account fees (inclusive of cash management fees) $ 23,486 $ 23,370 $ 16,745 Interchange fees 11,865 10,881 8,862 ATM fees 4,243 3,866 2,989 Investment management - wealth management and advisory services 34,588 32,774 31,617 Investment management - retail investments and insurance revenue 5,603 4,058 3,691 Payment processing income 1,675 1,534 1,362 Credit card income 2,119 1,833 1,231 Other noninterest income 5,684 6,099 5,312 Total noninterest income in-scope of ASC 606 89,263 84,415 71,809 Total noninterest income out-of-scope of ASC 606 35,346 30,252 34,041 Total noninterest income $ 124,609 $ 114,667 $ 105,850
Contract with Customer, Asset and Liability [Table Text Block]	The following table provides the amount of investment management revenue earned but not received as of the dates indicated: December 31, 2023 December 31, 2022 (Dollars in thousands) Receivables, included in other assets $ 5,509 $ 5,261

OTHER COMPREHENSIVE LOSS (Table

OTHER COMPREHENSIVE LOSS (Tables)	12 Months Ended
	Dec. 31, 2023
Equity [Abstract]
Schedule of Other Comprehensive Loss	The following tables present a reconciliation of the changes in the components of other comprehensive income (loss) for the periods indicated, including the amount of income tax (expense) benefit allocated to each component of other comprehensive income (loss): Year Ended December 31, 2023 Pre-Tax Tax (Expense) After Tax (Dollars in thousands) Change in fair value of securities available for sale $ 42,019 $ (9,593) $ 32,426 Less: net security losses reclassified into other noninterest expense — — — Net change in fair value of securities available for sale 42,019 (9,593) 32,426 Change in fair value of cash flow hedges (5,078) 1,428 (3,650) Less: net cash flow hedge losses reclassified into interest income or interest expense (27,414) 7,709 (19,705) Net change in fair value of cash flow hedges 22,336 (6,281) 16,055 Net unamortized gain related to defined benefit pension and other postretirement adjustments arising during the period 210 (59) 151 Amortization of net actuarial gains (536) 151 (385) Amortization of net prior service costs 39 (11) 28 Amortization of net settlement credits (25) 7 (18) Net change in other comprehensive income for defined benefit postretirement plans (1) (312) 88 (224) Total other comprehensive income $ 64,043 $ (15,786) $ 48,257 Year Ended December 31, 2022 Pre-Tax Tax (Expense) After Tax (Dollars in thousands) Change in fair value of securities available for sale $ (155,037) $ 36,047 $ (118,990) Less: net security losses reclassified into other noninterest expense — — — Net change in fair value of securities available for sale (155,037) 36,047 (118,990) Change in fair value of cash flow hedges (65,586) 18,452 (47,134) Less: net cash flow hedge gains reclassified into interest income or interest expense 5,054 (1,421) 3,633 Net change in fair value of cash flow hedges (70,640) 19,873 (50,767) Net unamortized gain related to defined benefit pension and other postretirement adjustments arising during the period 5,603 (1,575) 4,028 Amortization of net actuarial losses 635 (179) 456 Amortization of net prior service costs 39 (11) 28 Amortization of net settlement credits (31) 9 (22) Net change in other comprehensive income for defined benefit postretirement plans (1) 6,246 (1,756) 4,490 Total other comprehensive loss $ (219,431) $ 54,164 $ (165,267) Year Ended December 31, 2021 Pre-Tax Tax (Expense) After Tax (Dollars in thousands) Change in fair value of securities available for sale $ (29,995) $ 7,073 $ (22,922) Less: net security losses reclassified into other noninterest expense — — — Net change in fair value of securities available for sale (29,995) 7,073 (22,922) Change in fair value of cash flow hedges (7,938) 2,234 (5,704) Less: net cash flow hedge gains reclassified into interest income or interest expense 18,691 (5,256) 13,435 Net change in fair value of cash flow hedges (26,629) 7,490 (19,139) Net unamortized gain related to defined benefit pension and other postretirement adjustments arising during the period 3,414 (960) 2,454 Amortization of net actuarial losses 1,331 (374) 957 Amortization of net prior service costs 192 (54) 138 Net change in other comprehensive income for defined benefit postretirement plans (1) 4,937 (1,388) 3,549 Total other comprehensive loss $ (51,687) $ 13,175 $ (38,512) (1) The amortization of prior service costs is included in the computation of net periodic pension costs as disclosed in Note 12 - Employee Benefit Plans within the Notes to the Consolidated Financial Statements in Item 8.
Schedule of Accumulated Other Comprehensive Income (Loss), Net of Tax	Information on the Company's accumulated other comprehensive income (loss), net of tax, is comprised of the following components as of the dates indicated: Unrealized Gain (Loss) on Securities Unrealized Gain (Loss) on Cash Flow Hedge Defined Benefit Postretirement Plans Accumulated Other Comprehensive Income (Loss) (Dollars in Thousands) Beginning balance: January 1, 2021 $ 13,255 $ 33,276 $ (5,836) $ 40,695 Other comprehensive income (loss) (22,922) (19,139) 3,549 (38,512) Ending balance: December 31, 2021 $ (9,667) $ 14,137 $ (2,287) $ 2,183 Other comprehensive income (loss) (118,990) (50,767) 4,490 (165,267) Ending balance: December 31, 2022 $ (128,657) $ (36,630) $ 2,203 $ (163,084) Other comprehensive income (loss) 32,426 16,055 (224) 48,257 Ending balance: December 31, 2023 $ (96,231) $ (20,575) $ 1,979 $ (114,827)

LEASES (Tables)

LEASES (Tables)	12 Months Ended
	Dec. 31, 2023
Leases [Abstract]
Lease, Cost [Table Text Block]	The following table provides information related to the Company's lease costs for the periods indicated: Years Ended December 31 2023 2022 2021 (Dollars in thousands) Operating lease costs (1) $ 14,472 $ 17,322 $ 14,550 Short-term lease costs 28 72 23 Variable lease costs — — — Total lease costs $ 14,500 $ 17,394 $ 14,573 Weighted-average remaining lease term - operating leases 5.61 years 5.46 years 5.72 years Weighted-average discount rate - operating leases 2.98 % 2.43 % 1.97 % (1)	[1]
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	The following table sets forth the undiscounted cash flows of base rent related to operating leases outstanding at December 31, 2023 with payments scheduled over the next five years and thereafter, including a reconciliation to the operating lease liability recognized in the Company's Consolidated Balance Sheet in other liabilities: (Dollars in thousands) 2024 $ 13,961 2025 13,050 2026 10,910 2027 8,243 2028 5,243 Thereafter 10,395 Total minimum lease payments 61,802 Less: amount representing interest 5,525 Present value of future minimum lease payments $ 56,277
[1] Operating lease costs for the periods presented are inclusive of lease exit costs noted above.

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	12 Months Ended
	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Schedule of Off-Balance Sheet Financial Instruments	The following table summarizes the above financial instruments at the dates indicated: As of December 31 2023 2022 (Dollars in thousands) Commitments to extend credit $ 4,632,105 $ 4,566,041 Loan exposures sold with recourse $ 153,850 $ 167,274 Standby letters of credit $ 21,427 $ 24,941 Deferred standby letter of credit fees $ 155 $ 168

REGULATORY CAPITAL REQUIREMEN_2

REGULATORY CAPITAL REQUIREMENTS (Tables)	12 Months Ended
	Dec. 31, 2023
Regulated Operations [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	The Company’s and the Bank’s actual capital amounts and ratios as of December 31, 2023 and 2022 are also presented in the table that follows: Actual For Capital To Be Well Capitalized Amount Ratio Amount Ratio Amount Ratio December 31, 2023 (Dollars in thousands) Independent Bank Corp. Total capital (to risk weighted assets) $ 2,268,863 15.91 % $ 1,140,554 ≥ 8.0 % N/A N/A Common equity tier 1 capital (to risk weighted assets) $ 2,022,873 14.19 % $ 641,562 ≥ 4.5 % N/A N/A Tier 1 capital (to risk weighted assets) $ 2,022,873 14.19 % $ 855,416 ≥ 6.0 % N/A N/A Tier 1 capital (to average assets) leverage $ 2,022,873 10.96 % $ 737,984 ≥ 4.0 % N/A N/A Rockland Trust Company Total capital (to risk weighted assets) $ 2,183,436 15.32 % $ 1,140,550 ≥ 8.0 % $ 1,425,687 ≥ 10.0 % Common equity tier 1 capital (to risk weighted assets) $ 2,048,426 14.37 % $ 641,559 ≥ 4.5 % $ 926,696 ≥ 6.5 % Tier 1 capital (to risk weighted assets) $ 2,048,426 14.37 % $ 855,412 ≥ 6.0 % $ 1,140,550 ≥ 8.0 % Tier 1 capital (to average assets) leverage $ 2,048,426 11.10 % $ 738,055 ≥ 4.0 % $ 922,568 ≥ 5.0 % December 31, 2022 (Dollars in thousands) Independent Bank Corp. Total capital (to risk weighted assets) $ 2,311,824 16.11 % $ 1,148,328 ≥ 8.0 % N/A N/A Common equity tier 1 capital (to risk weighted assets) $ 2,057,099 14.33 % $ 645,935 ≥ 4.5 % N/A N/A Tier 1 capital (to risk weighted assets) $ 2,057,099 14.33 % $ 861,246 ≥ 6.0 % N/A N/A Tier 1 capital (to average assets) $ 2,057,099 10.99 % $ 748,775 ≥ 4.0 % N/A N/A Rockland Trust Company Total capital (to risk weighted assets) $ 2,162,752 15.07 % $ 1,148,329 ≥ 8.0 % $ 1,435,411 ≥ 10.0 % Common equity tier 1 capital (to risk weighted assets) $ 2,018,912 14.07 % $ 645,935 ≥ 4.5 % $ 933,017 ≥ 6.5 % Tier 1 capital (to risk weighted assets) $ 2,018,912 14.07 % $ 861,247 ≥ 6.0 % $ 1,148,329 ≥ 8.0 % Tier 1 capital (to average assets) $ 2,018,912 10.78 % $ 748,828 ≥ 4.0 % $ 936,036 ≥ 5.0 %

PARENT COMPANY FINANCIALS ONLY

PARENT COMPANY FINANCIALS ONLY (Tables)	12 Months Ended
	Dec. 31, 2023
Condensed Financial Information Disclosure [Abstract]
Schedule of Condensed Balance Sheets	BALANCE SHEETS December 31 2023 2022 (Dollars in thousands) Assets Cash (1) $ 108,788 $ 169,977 Investments in subsidiaries (2) 2,922,698 2,850,407 Prepaid income taxes 2,488 2,299 Deferred tax asset 429 453 Other assets (2) — 2,297 Total assets $ 3,034,403 $ 3,025,433 Liabilities and stockholders’ equity Dividends payable $ 23,580 $ 25,103 Junior subordinated debentures (less unamortized debt issuance costs of $30 and $33) 62,858 62,855 Subordinated debentures (less unamortized debt issuance costs of $20 and $115) 49,980 49,885 Other liabilities 2,734 889 Total liabilities 139,152 138,732 Stockholders’ equity 2,895,251 2,886,701 Total liabilities and stockholders’ equity $ 3,034,403 $ 3,025,433 (1) Entire balance eliminates in consolidation. (2)
Schedule of Condensed Statements of Income	STATEMENTS OF INCOME Years Ended December 31 2023 2022 2021 (Dollars in thousands) Income Dividends received from subsidiaries (1) $ 229,046 $ 209,257 $ 77,673 Total income 229,046 209,257 77,673 Expenses Interest expense 6,829 4,626 4,493 Other expenses 3,156 1,680 — Total expenses 9,985 6,306 4,493 Income before income taxes and equity in undistributed income of subsidiaries 219,061 202,951 73,180 Income tax benefit (2,785) (1,731) (1,241) Income of parent company 221,846 204,682 74,421 Equity in undistributed income of subsidiaries 17,656 59,131 46,571 Net income $ 239,502 $ 263,813 $ 120,992 (1)
Schedule of Condensed Statements of Cash Flows	STATEMENTS OF CASH FLOWS Years Ended December 31 2023 2022 2021 (Dollars in thousands) Cash flows from operating activities Net income $ 239,502 $ 263,813 $ 120,992 Adjustments to reconcile net income to cash provided by operating activities Amortization 98 96 137 Deferred income tax expense 24 28 12 Change in prepaid income taxes and other assets 2,107 (623) (229) Change in other liabilities 52 143 (1,873) Equity in undistributed income of subsidiaries (17,656) (59,131) (46,571) Net cash provided by operating activities 224,127 204,326 72,468 Cash flows provided by investing activities Net cash acquired in business combinations — — 119,816 Net cash provided by in investing activities — — 119,816 Cash flows used in financing activities Repayments of long-term debt, net of issuance costs — (14,063) (18,750) Restricted stock awards issued, net of awards surrendered (1,142) (1,084) (1,249) Net proceeds from exercise of stock options 80 — (57) Proceeds from shares issued under direct stock purchase plan 2,662 2,359 2,023 Payments for shares repurchased under share repurchase programs (188,910) (139,946) — Common dividends paid (98,006) (93,734) (62,736) Net cash used in financing activities (285,316) (246,468) (80,769) Net (decrease) increase in cash and cash equivalents (61,189) (42,142) 111,515 Cash and cash equivalents at the beginning of the year 169,977 212,119 100,604 Cash and cash equivalents at the end of the year $ 108,788 $ 169,977 $ 212,119

TRANSACTIONS WITH RELATED PAR_2

TRANSACTIONS WITH RELATED PARTIES Activity of Loans to Related Parties (Tables)	12 Months Ended
	Dec. 31, 2023
Related Party Transactions [Abstract]
Schedule of Related Party Transactions [Table Text Block]	The following information represents annual activity of loans to related parties for the periods indicated: 2023 2022 2021 (Dollars in thousands) Principal balance of loans outstanding at beginning of year $ 26,721 $ 45,033 $ 26,343 Loan advances (1) 911 40,427 57,983 Loan payments/payoffs (1,336) (43,147) (39,293) Reduction for retired directors and/or changes in director status (14,369) (15,592) — Principal balance of loans outstanding at end of year $ 11,927 $ 26,721 $ 45,033 (1) The 2021 amount includes $10.6 million of loans associated with a new director, which represent the outstanding loans balances at the effective date of appointment.

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Textual)	12 Months Ended
	Dec. 31, 2023
Maximum [Member]
Accounting Policies [Line Items]
Lease Option Period	15 years

SECURITIES Securities (Equity g

SECURITIES Securities (Equity gains and losses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Equity Securities, FV-NI, Gain (Loss) [Abstract]	$ 1,180	$ (3,061)	$ 554
Equity Securities, FV-NI, Realized Gain (Loss)	197	0	192
Equity Securities, FV-NI, Unrealized Gain (Loss)	$ 983	$ (3,061)	$ 362

SECURITIES (Reconciliation of f

SECURITIES (Reconciliation of fair value of Available for Sale securities) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale, Amortized Cost	$ 1,459,862	$ 1,566,779
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	30	54
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(125,636)	(167,679)
Debt Securities, Available-for-Sale	1,334,256	1,399,154
Debt Securities, Available-for-Sale,	1,459,862	1,566,779
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest	0	0
US Government Agencies Debt Securities [Member]
Debt Securities, Available-for-sale, Amortized Cost	230,198	230,936
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(23,060)	(28,636)
Debt Securities, Available-for-Sale	207,138	202,300
Debt Securities, Available-for-Sale,	230,198	230,936
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest	0	0
US Treasury Securities [Member]
Debt Securities, Available-for-sale, Amortized Cost	824,597	874,035
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(55,495)	(82,694)
Debt Securities, Available-for-Sale	769,102	791,341
Debt Securities, Available-for-Sale,	824,597	874,035
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest	0	0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale, Amortized Cost	314,269	359,068
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	24	54
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(37,246)	(45,434)
Debt Securities, Available-for-Sale	277,047	313,688
Debt Securities, Available-for-Sale,	314,269	359,068
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest	0	0
Agency collateralized mortgage obligations [Member]
Debt Securities, Available-for-sale, Amortized Cost	35,713	41,874
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	6
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(2,530)	(3,031)
Debt Securities, Available-for-Sale	33,189	38,843
Debt Securities, Available-for-Sale,	35,713	41,874
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest	0	0
US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Available-for-sale, Amortized Cost	195	193
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(5)	(2)
Debt Securities, Available-for-Sale	190	191
Debt Securities, Available-for-Sale,	195	193
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest	0	0
Pooled Trust Preferred Securities Issued By Banks And Insurers [Member]
Debt Securities, Available-for-sale, Amortized Cost	1,188	1,203
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(170)	(169)
Debt Securities, Available-for-Sale	1,018	1,034
Debt Securities, Available-for-Sale,	1,188	1,203
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest	0	0
Small Business Administration Pooled Securities [Member]
Debt Securities, Available-for-sale, Amortized Cost	53,702	59,470
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(7,130)	(7,713)
Debt Securities, Available-for-Sale	46,572	51,757
Debt Securities, Available-for-Sale,	53,702	59,470
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest	$ 0	$ 0

SECURITIES (Available for Sale

SECURITIES (Available for Sale securities in continuous unrealized loss position) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) holding	Dec. 31, 2022 USD ($) holding	Dec. 31, 2021 USD ($)
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding	163	173
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 1,620	$ 333,099
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	18	35,411
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,328,959	1,062,964
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(125,618)	(132,268)
Debt Securities, Available-for-sale, Unrealized Loss Position	1,330,579	1,396,063
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(125,636)	(167,679)
Equity Securities, FV-NI, Realized Gain (Loss)	$ 197	$ 0	$ 192
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding	115	123
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 1,091	$ 155,944
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	11	15,186
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	273,447	154,653
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(37,235)	(30,248)
Debt Securities, Available-for-sale, Unrealized Loss Position	274,538	310,597
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (37,246)	$ (45,434)
Agency collateralized mortgage obligations [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding	12	13
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 339	$ 38,843
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2	3,031
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	31,682	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(2,528)	0
Debt Securities, Available-for-sale, Unrealized Loss Position	32,021	38,843
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (2,530)	$ (3,031)
Pooled Trust Preferred Securities Issued By Banks And Insurers [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding	1	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,018	1,034
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(170)	(169)
Debt Securities, Available-for-sale, Unrealized Loss Position	1,018	1,034
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (170)	$ (169)
US Treasury Securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding	17	18
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 43,035
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		6,350
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	769,102	748,306
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(55,495)	(76,344)
Debt Securities, Available-for-sale, Unrealized Loss Position	769,102	791,341
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (55,495)	$ (82,694)
US Government Agencies Debt Securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding	9	9
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 60,575
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		7,292
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	207,138	141,725
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(23,060)	(21,344)
Debt Securities, Available-for-sale, Unrealized Loss Position	207,138	202,300
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (23,060)	$ (28,636)
US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding	1	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 190	$ 191
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	5	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Unrealized Loss Position	190	191
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (5)	$ (2)
Small Business Administration Pooled Securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | holding	8	8
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 34,511
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	3,550
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	46,572	17,246
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(7,130)	(4,163)
Debt Securities, Available-for-sale, Unrealized Loss Position	46,572	51,757
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (7,130)	$ (7,713)

SECURITIES (Reconciliation of a

SECURITIES (Reconciliation of amortized cost of held to maturity securities) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss	$ 1,569,107	$ 1,705,120
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	559	729
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(152,058)	(181,139)
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest	0	0
Fair Value	1,417,608	1,524,710
US Government Agencies Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss	29,521	31,258
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	0	0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(1,113)	(2,222)
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest	0	0
Fair Value	28,408	29,036
US Treasury Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss	100,712	100,634
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(9,177)	(11,755)
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest	0	0
Fair Value	91,535	88,879
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss	829,431	898,927
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	175	408
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(65,878)	(83,383)
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest	0	0
Fair Value	763,728	815,952
Agency collateralized mortgage obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss	477,517	535,971
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(69,606)	(77,554)
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest	0	0
Fair Value	407,911	458,417
Single issuer trust preferred securities issued by banks [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss	1,500	1,500
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	0	8
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(127)	0
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest	0	0
Fair Value	1,373	1,508
Small Business Administration Pooled Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss	130,426	136,830
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	384	313
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(6,157)	(6,225)
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest	0	0
Fair Value	$ 124,653	$ 130,918

SECURITIES (Schedule of Contrac

SECURITIES (Schedule of Contractual maturities) (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost, Total	$ 1,459,862
Available for Sale, Fair Value
Fair Value	1,334,256
Held to Maturity, Amortized Cost
Amortized Cost	1,569,107
Held to Maturity, Fair Value
AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesWithinOneYearFairValue	221,603
AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterOneThroughFiveYearsFair Value	1,417,081
AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterFiveThroughTenYearsFairValue	286,874
AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterTenYearsFairValue	826,306
Debt Securities, Available-for-sale and Held-to-maturity	2,751,864
AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesWithinOneYearAmortizedCost	227,077
AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterOneThroughFiveYearsAmortizedCost	1,544,384
AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterFiveThroughTenYearsAmortizedCost	323,702
AvailableForSaleandHeldToMaturityDebtSecuritiesMaturitiesAfterTenYearsAmortizedCost	933,806
AvailableForSaleandHeldToMaturityDebtSecuritiesAmortizedCost	3,028,969
US Government Agencies Debt Securities [Member]
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Due in one year or less	0
Due after one year to five years	199,371
Due after five to ten years	30,827
Due after ten years	0
Debt Securities, Available-for-Sale, Amortized Cost, Total	230,198
Available for Sale, Fair Value
Due in one year or less	0
Due in one year or less	179,973
Due after five to ten years	27,165
Due after ten years	0
Fair Value	207,138
Held to Maturity, Amortized Cost
Due in one year or less	29,521
Due after one year to five years	0
Due after five to ten years	0
Due after ten years	0
Amortized Cost	29,521
Held to Maturity, Fair Value
Due in one year or less	28,408
Due after one year to five years	0
Due after five to ten years	0
Due after ten years	0
Fair Value	28,408
Debt Securities [Member]
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Due in one year or less	197,556
Due after one year to five years	967,822
Due after five to ten years	73,933
Due after ten years	220,551
Available for Sale, Fair Value
Due in one year or less	193,195
Due in one year or less	882,557
Due after five to ten years	64,784
Due after ten years	193,720
Held to Maturity, Amortized Cost
Due in one year or less	29,521
Due after one year to five years	576,562
Due after five to ten years	249,769
Due after ten years	713,255
Held to Maturity, Fair Value
Due in one year or less	28,408
Due after one year to five years	534,524
Due after five to ten years	222,090
Due after ten years	632,586
Fair Value	1,417,608
US Treasury Securities [Member]
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Due in one year or less	197,553
Due after one year to five years	627,044
Due after five to ten years	0
Due after ten years	0
Debt Securities, Available-for-Sale, Amortized Cost, Total	824,597
Available for Sale, Fair Value
Due in one year or less	193,192
Due in one year or less	575,910
Due after five to ten years	0
Due after ten years	0
Fair Value	769,102
Held to Maturity, Amortized Cost
Due in one year or less	0
Due after one year to five years	99,720
Due after five to ten years	992
Due after ten years	0
Amortized Cost	100,712
Held to Maturity, Fair Value
Due in one year or less	0
Due after one year to five years	90,703
Due after five to ten years	832
Due after ten years	0
Fair Value	91,535
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Due in one year or less	3
Due after one year to five years	141,212
Due after five to ten years	40,183
Due after ten years	132,871
Debt Securities, Available-for-Sale, Amortized Cost, Total	314,269
Available for Sale, Fair Value
Due in one year or less	3
Due in one year or less	126,484
Due after five to ten years	34,939
Due after ten years	115,621
Fair Value	277,047
Held to Maturity, Amortized Cost
Due in one year or less	0
Due after one year to five years	411,746
Due after five to ten years	222,825
Due after ten years	194,860
Amortized Cost	829,431
Held to Maturity, Fair Value
Due in one year or less	0
Due after one year to five years	383,514
Due after five to ten years	198,122
Due after ten years	182,092
Fair Value	763,728
Agency collateralized mortgage obligations [Member]
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Due in one year or less	0
Due after one year to five years	0
Due after five to ten years	2,923
Due after ten years	32,790
Debt Securities, Available-for-Sale, Amortized Cost, Total	35,713
Available for Sale, Fair Value
Due in one year or less	0
Due in one year or less	0
Due after five to ten years	2,680
Due after ten years	30,509
Fair Value	33,189
Held to Maturity, Amortized Cost
Due in one year or less	0
Due after one year to five years	63,596
Due after five to ten years	20,210
Due after ten years	393,711
Amortized Cost	477,517
Held to Maturity, Fair Value
Due in one year or less	0
Due after one year to five years	58,934
Due after five to ten years	17,864
Due after ten years	331,113
Fair Value	407,911
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Due in one year or less	0
Due after one year to five years	195
Due after five to ten years	0
Due after ten years	0
Debt Securities, Available-for-Sale, Amortized Cost, Total	195
Available for Sale, Fair Value
Due in one year or less	0
Due in one year or less	190
Due after five to ten years	0
Due after ten years	0
Fair Value	190
Single issuer trust preferred securities issued by banks [Member]
Held to Maturity, Amortized Cost
Due in one year or less	0
Due after one year to five years	1,500
Due after five to ten years	0
Due after ten years	0
Amortized Cost	1,500
Held to Maturity, Fair Value
Due in one year or less	0
Due after one year to five years	1,373
Due after five to ten years	0
Due after ten years	0
Fair Value	1,373
Pooled Trust Preferred Securities Issued By Banks And Insurers [Member]
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Due in one year or less	0
Due after one year to five years	0
Due after five to ten years	0
Due after ten years	1,188
Debt Securities, Available-for-Sale, Amortized Cost, Total	1,188
Available for Sale, Fair Value
Due in one year or less	0
Due in one year or less	0
Due after five to ten years	0
Due after ten years	1,018
Fair Value	1,018
Small Business Administration Pooled Securities [Member]
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Due in one year or less	0
Due after one year to five years	0
Due after five to ten years	0
Due after ten years	53,702
Debt Securities, Available-for-Sale, Amortized Cost, Total	53,702
Available for Sale, Fair Value
Due in one year or less	0
Due in one year or less	0
Due after five to ten years	0
Due after ten years	46,572
Fair Value	46,572
Held to Maturity, Amortized Cost
Due in one year or less	0
Due after one year to five years	0
Due after five to ten years	5,742
Due after ten years	124,684
Amortized Cost	130,426
Held to Maturity, Fair Value
Due in one year or less	0
Due after one year to five years	0
Due after five to ten years	5,272
Due after ten years	119,381
Fair Value	$ 124,653

SECURITIES (Details Textual)

SECURITIES (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Trading	$ 4,987	$ 3,888
Equity Securities, FV-NI	22,510	21,119
Investments in obligations of individual states, counties or municipalities which exceed 10% of equity	0	0
Interest Receivable	60,200	50,800	$ 43,700
Debt Securities, Available-for-sale, Past due	0	0
Debt Securities, Held-to-maturity, 90 Days or More Past Due, Still Accruing	0	0
Debt Securities, Held-to-maturity, Sold, Realized Gain (Loss)	0	0
Debt Securities, Held-to-Maturity, Accrued Interest, Writeoff	0	0
Debt Securities, Available-for-Sale, Accrued Interest Writeoff	0	0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Period Increase (Decrease)	0	0
Debt Securities, Held-to-maturity, Allowance for Credit Loss, Period Increase (Decrease)	0	0
Callable securities in investment portfolio	25,400
Debt Securities, Available-for-sale, Allowance for Credit Loss, Period Increase (Decrease)	0	0
Debt Securities, Available-for-Sale, Accrued Interest Writeoff	0	0
Debt Securities, Available-for-sale, Realized Gain (Loss)	0	0
Debt Securities, Held-to-maturity, Allowance for Credit Loss, Period Increase (Decrease)	0	0
Debt Securities, Held-to-Maturity, Accrued Interest, Writeoff	0	0
Debt Securities, Held-to-maturity, Sold, Realized Gain (Loss)	0	0
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss	$ 3,400	3,600
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Other Assets
Debt Securities, Available-for-sale, Nonaccrual	$ 0	0
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Nonaccrual	0	0
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss	$ 4,300	4,400
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Other Assets
Asset Pledged as Collateral
Debt Securities	$ 1,700,000	959,800
Debt Securities	$ 1,700,000	$ 959,800

Internal Risk Rating Categories

Internal Risk Rating Categories for Commercial Portfolio (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year	[1]	$ 2,341,745	$ 3,041,156
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	[1]	2,555,672	2,562,886
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	[1]	2,115,126	1,828,783
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	[1]	1,675,310	1,005,371
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	[1]	812,408	972,045
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	[1]	3,073,487	2,766,394
Financing Receivable, Revolving	[1]	1,696,148	1,743,381
Financing Receivable, Allowance for Credit Loss, Writeoff		34,782	2,652	$ 4,944
Financing Receivable, Revolving, Writeoff		23,893
Financing Receivable, Revolving, Converted to Term Loan, Writeoff		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff		83
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff		2,783
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff		40
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff		5,163
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff		2,766
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff		54
Financing Receivable, Allowance for Credit Loss	[1]	14,278,070	13,928,675
Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving	[1]	8,174	8,659
Commercial and Industrial [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		335,947	357,261
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		167,000	140,438
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		88,412	114,223
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		73,951	62,298
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		46,806	79,858
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		113,916	18,820
Financing Receivable, Revolving		753,864	859,040
Financing Receivable, Allowance for Credit Loss, Writeoff		23,564	0	3,474
Financing Receivable, Revolving, Writeoff		23,439
Financing Receivable, Revolving, Converted to Term Loan, Writeoff		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff		34
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff		91
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Allowance for Credit Loss		1,579,986	1,635,103
Commercial and Industrial [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		90	3,165
Commercial Real Estate [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		1,216,369	1,361,967
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		1,252,848	1,556,779
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		1,374,539	1,258,498
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		1,294,792	742,027
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		610,148	757,909
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		2,210,093	2,037,904
Financing Receivable, Revolving		79,360	44,477
Financing Receivable, Allowance for Credit Loss, Writeoff		7,855	62	0
Financing Receivable, Revolving, Writeoff		0
Financing Receivable, Revolving, Converted to Term Loan, Writeoff		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff		2,783
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff		5,072
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Allowance for Credit Loss		8,041,508	7,760,230
Commercial Real Estate [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		3,359	669
Construction Loans [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		203,106	556,912
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		407,498	338,827
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		151,142	173,185
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		44,953	56,693
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		23,823	3,135
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		1,561	1,588
Financing Receivable, Revolving		17,503	23,122
Financing Receivable, Allowance for Credit Loss, Writeoff		0	0	0
Financing Receivable, Revolving, Writeoff		0
Financing Receivable, Revolving, Converted to Term Loan, Writeoff		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Allowance for Credit Loss		849,586	1,154,413
Construction Loans [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving			951
Small Business [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		51,264	55,015
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		51,439	45,061
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		39,525	31,841
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		26,272	16,954
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		12,944	10,073
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		23,265	19,409
Financing Receivable, Revolving		47,247	40,749
Financing Receivable, Allowance for Credit Loss, Writeoff		484	196	219
Financing Receivable, Revolving, Writeoff		390
Financing Receivable, Revolving, Converted to Term Loan, Writeoff		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff		40
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff		54
Financing Receivable, Allowance for Credit Loss		251,956	219,102
Small Business [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		0	0
Residential Real Estate [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		505,517	665,407
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		638,223	419,665
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		405,386	194,615
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		184,833	94,223
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		89,327	94,425
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		601,468	567,189
Financing Receivable, Revolving		0	0
Financing Receivable, Allowance for Credit Loss, Writeoff		0	0	$ 0
Financing Receivable, Revolving, Writeoff		0
Financing Receivable, Revolving, Converted to Term Loan, Writeoff		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Allowance for Credit Loss		2,424,754	2,035,524
Residential Real Estate [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		0	0
Home Equity Loan [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		28,903	43,917
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		38,401	60,103
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		54,944	54,802
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		49,803	32,136
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		29,103	26,414
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		121,349	118,450
Financing Receivable, Revolving		770,398	749,054
Financing Receivable, Allowance for Credit Loss, Writeoff		47
Financing Receivable, Revolving, Writeoff		47
Financing Receivable, Revolving, Converted to Term Loan, Writeoff		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff		0
Financing Receivable, Allowance for Credit Loss		1,097,626	1,088,750
Home Equity Loan [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		4,725	3,874
Consumer Loan [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year	[1]	639	677
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	[1]	263	2,013
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	[1]	1,178	1,619
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	[1]	706	1,040
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	[1]	257	231
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	[1]	1,835	3,034
Financing Receivable, Revolving	[1]	27,776	26,939
Financing Receivable, Allowance for Credit Loss, Writeoff	[1]	2,832
Financing Receivable, Revolving, Writeoff	[1]	17
Financing Receivable, Revolving, Converted to Term Loan, Writeoff	[1]	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	[1]	49
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	[1]	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	[1]	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	[1]	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	[1]	2,766
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	[1]	0
Financing Receivable, Allowance for Credit Loss	[1]	32,654	35,553
Consumer Loan [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving	[1]	0	0
Pass [Member] | Commercial and Industrial [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		329,892	350,036
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		165,003	137,832
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		86,982	113,020
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		64,483	59,936
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		45,867	79,391
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		110,135	18,197
Financing Receivable, Revolving		692,918	815,128
Financing Receivable, Allowance for Credit Loss		1,495,370	1,576,705
Pass [Member] | Commercial and Industrial [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		90	3,165
Pass [Member] | Commercial Real Estate [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		1,116,730	1,277,333
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		1,197,017	1,487,333
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		1,300,140	1,213,984
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		1,276,967	723,794
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		592,058	696,166
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		2,078,644	1,833,099
Financing Receivable, Revolving		79,360	44,477
Financing Receivable, Allowance for Credit Loss		7,644,275	7,276,855
Pass [Member] | Commercial Real Estate [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		3,359	669
Pass [Member] | Construction Loans [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		180,045	504,932
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		381,352	327,194
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		127,431	169,838
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		44,953	56,693
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		23,823	3,135
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		1,561	1,588
Financing Receivable, Revolving		17,503	23,122
Financing Receivable, Allowance for Credit Loss		776,668	1,087,453
Pass [Member] | Construction Loans [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving			951
Pass [Member] | Small Business [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		50,734	54,876
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		51,157	44,811
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		39,435	31,051
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		25,643	16,588
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		12,944	9,882
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		22,412	18,891
Financing Receivable, Revolving		46,130	39,434
Financing Receivable, Allowance for Credit Loss		248,455	215,533
Pass [Member] | Small Business [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		0	0
Pass [Member] | Residential Real Estate [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		505,517	665,407
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		638,223	419,665
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		405,386	193,886
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		184,833	94,065
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		88,473	94,425
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		598,562	565,246
Financing Receivable, Revolving		0	0
Financing Receivable, Allowance for Credit Loss		2,420,994	2,032,694
Pass [Member] | Residential Real Estate [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		0	0
Pass [Member] | Home Equity Loan [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		28,903	43,917
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		38,401	60,103
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		54,944	54,802
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		49,803	32,014
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		29,103	26,414
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		121,286	118,367
Financing Receivable, Revolving		770,074	748,294
Financing Receivable, Allowance for Credit Loss		1,097,097	1,087,785
Pass [Member] | Home Equity Loan [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		4,583	3,874
Pass [Member] | Consumer Loan [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year	[1]	639	677
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	[1]	263	2,013
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	[1]	1,178	1,619
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	[1]	706	1,022
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	[1]	256	231
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	[1]	1,835	3,023
Financing Receivable, Revolving	[1]	27,769	26,939
Financing Receivable, Allowance for Credit Loss	[1]	32,646	35,524
Pass [Member] | Consumer Loan [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving	[1]	0	0
Potential weakness [Member] | Commercial and Industrial [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		4,188	4,836
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		668	925
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		528	1,023
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		9,358	1,744
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		22	467
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		121	623
Financing Receivable, Revolving		28,218	17,122
Financing Receivable, Allowance for Credit Loss		43,103	26,740
Potential weakness [Member] | Commercial and Industrial [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		0	0
Potential weakness [Member] | Commercial Real Estate [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		62,337	42,005
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		37,510	65,603
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		51,555	39,740
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		13,269	14,167
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		1,859	58,190
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		118,526	183,468
Financing Receivable, Revolving		0	0
Financing Receivable, Allowance for Credit Loss		285,056	403,173
Potential weakness [Member] | Commercial Real Estate [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		0	0
Potential weakness [Member] | Construction Loans [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		12,106	33,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year			1,775
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		5,292	3,347
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		0	0
Financing Receivable, Revolving		0	0
Financing Receivable, Allowance for Credit Loss		17,398	38,122
Potential weakness [Member] | Construction Loans [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		0	0
Potential weakness [Member] | Small Business [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year			152
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year			373
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		154	366
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year			191
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		184	117
Financing Receivable, Revolving		314	686
Financing Receivable, Allowance for Credit Loss		652	1,885
Potential weakness [Member] | Small Business [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		0	0
Definite weakness [Member] | Commercial and Industrial [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		1,867	2,389
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		1,329	1,681
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		902	180
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		110	618
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		917
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		3,660
Financing Receivable, Revolving		32,728	3,623
Financing Receivable, Allowance for Credit Loss		41,513	8,491
Definite weakness [Member] | Commercial and Industrial [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		0	0
Definite weakness [Member] | Commercial Real Estate [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		37,302	42,629
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		18,321	3,843
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		22,844	4,774
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		4,556	4,066
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		7,881	3,553
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		12,923	21,162
Financing Receivable, Revolving		0	0
Financing Receivable, Allowance for Credit Loss		103,827	80,027
Definite weakness [Member] | Commercial Real Estate [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		0	0
Definite weakness [Member] | Construction Loans [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		10,955	18,980
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		26,146	9,858
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		18,419	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		0	0
Financing Receivable, Revolving		0	0
Financing Receivable, Allowance for Credit Loss		55,520	28,838
Definite weakness [Member] | Construction Loans [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		0	0
Definite weakness [Member] | Small Business [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		530	139
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		282	98
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		90	417
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		475
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		669	401
Financing Receivable, Revolving		803	629
Financing Receivable, Allowance for Credit Loss		2,849	1,684
Definite weakness [Member] | Small Business [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		0	0
Parital loss probable [Member] | Commercial and Industrial [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		0	0
Financing Receivable, Revolving		0	23,167
Financing Receivable, Allowance for Credit Loss		0	23,167
Parital loss probable [Member] | Commercial and Industrial [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		0	0
Parital loss probable [Member] | Commercial Real Estate [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		8,350	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		0	175
Financing Receivable, Revolving		0	0
Financing Receivable, Allowance for Credit Loss		8,350	175
Parital loss probable [Member] | Commercial Real Estate [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		0	0
Parital loss probable [Member] | Construction Loans [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		0	0
Financing Receivable, Revolving		0	0
Financing Receivable, Allowance for Credit Loss		0	0
Parital loss probable [Member] | Construction Loans [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		0	0
Parital loss probable [Member] | Small Business [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		0	0
Financing Receivable, Revolving		0	0
Financing Receivable, Allowance for Credit Loss		0	0
Parital loss probable [Member] | Small Business [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		0	0
Definite loss [Member] | Commercial and Industrial [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		0	0
Financing Receivable, Revolving		0	0
Financing Receivable, Allowance for Credit Loss		0	0
Definite loss [Member] | Commercial and Industrial [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		0	0
Definite loss [Member] | Commercial Real Estate [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		0	0
Financing Receivable, Revolving		0	0
Financing Receivable, Allowance for Credit Loss		0	0
Definite loss [Member] | Commercial Real Estate [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		0	0
Definite loss [Member] | Construction Loans [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		0	0
Financing Receivable, Revolving		0	0
Financing Receivable, Allowance for Credit Loss		0	0
Definite loss [Member] | Construction Loans [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		0	0
Definite loss [Member] | Small Business [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		0	0
Financing Receivable, Revolving		0	0
Financing Receivable, Allowance for Credit Loss		0	0
Definite loss [Member] | Small Business [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		0	0
Default [Member] | Residential Real Estate [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year			729
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0	158
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		854	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		2,906	1,943
Financing Receivable, Revolving		0	0
Financing Receivable, Allowance for Credit Loss		3,760	2,830
Default [Member] | Residential Real Estate [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		0	0
Default [Member] | Home Equity Loan [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year		0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0	122
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		63	83
Financing Receivable, Revolving		324	760
Financing Receivable, Allowance for Credit Loss		529	965
Default [Member] | Home Equity Loan [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving		142
Default [Member] | Consumer Loan [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Year One, Originated, Current Fiscal Year	[1]	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	[1]	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	[1]	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	[1]	0	18
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	[1]	1	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	[1]		11
Financing Receivable, Revolving	[1]	7
Financing Receivable, Allowance for Credit Loss	[1]	8	29
Default [Member] | Consumer Loan [Member] | Revolving converted to term [Member]
Internal risk-rating categories for the Company's commercial portfolio
Financing Receivable, Revolving	[1]	$ 0	$ 0
[1] (2) Other consumer portfolio is inclusive of deposit account overdrafts recorded as loan balances and the associated gross write-offs.

Weighted Average FICO Scores &

Weighted Average FICO Scores & weighted Average Combined LTV Ratios (Details) - score		Dec. 31, 2023	Dec. 31, 2022
Residential Portfolio Segment [Member]
Weighted average FICO scores and the weighted average combined LTV Ratio
FICO score (re-scored)	[1]	754	753
Financing Receivable With Credit Quality Of Loan Based Upon the Weighted Average Loan-To-Value Ratio	[2]	59.80%	57%
Home Equity [Member]
Weighted average FICO scores and the weighted average combined LTV Ratio
FICO score (re-scored)	[1]	770	771
Financing Receivable With Credit Quality Of Loan Based Upon the Weighted Average Loan-To-Value Ratio	[2],[3]	43.30%	41.30%
[1] The average FICO scores at December 31, 2023 are based upon rescores from December 2023, as available for previously originated loans, or origination score data for loans booked in December 2023. The average FICO scores at December 31, 2022 were based upon rescores from December 2022, as available for previously originated loans, or origination score data for loans booked in December 2022. The combined LTV ratios for December 31, 2023 are based upon updated automated valuations as of November 2023, when available, and/or the most current valuation data available. The combined LTV ratios for December 31, 2022 were based upon updated automated valuations as of November 2022, when available, and/or the most current valuation data available as of such date. The updated automated valuations provide new information on loans that may be available since the previous valuation was obtained. If no new information is available, the valuation will default to the previously obtained data or most recent appraisal. For home equity loans and lines in a subordinate lien, the LTV data represents a combined LTV, taking into account the senior lien data for loans and lines.

Summary of Nonaccrual Loans (De

Summary of Nonaccrual Loans (Details) - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022
Financing Receivable Impaired [Line Items]
Tdrs Recorded Investment On Nonaccrual Status			$ 11,520
Financing Receivable, Nonaccrual		$ 54,383	54,881	[1]
Financing Receivable, Nonaccrual, No Allowance	[1]	11,343	3,072
Finance Receivable, Nonaccrual, with allowance		43,040	51,809
Commercial and Industrial [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Nonaccrual		20,188	26,693	[1]
Financing Receivable, Nonaccrual, No Allowance	[1]	298	298
Finance Receivable, Nonaccrual, with allowance		19,890	26,395
Commercial Real Estate [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Nonaccrual		22,952	15,730	[1]
Financing Receivable, Nonaccrual, No Allowance	[1]	11,041	2,769
Finance Receivable, Nonaccrual, with allowance		11,911	12,961
Small Business [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Nonaccrual		398	104	[1]
Financing Receivable, Nonaccrual, No Allowance	[1]	4	5
Finance Receivable, Nonaccrual, with allowance		394	99
Residential Real Estate [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Nonaccrual		7,634	8,479	[1]
Financing Receivable, Nonaccrual, No Allowance	[1]	0
Finance Receivable, Nonaccrual, with allowance		7,634	8,479
Home Equity [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Nonaccrual		3,171	3,400	[1]
Financing Receivable, Nonaccrual, No Allowance	[1]	0	0
Finance Receivable, Nonaccrual, with allowance		3,171	3,400
Consumer Portfolio Segment [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Nonaccrual		40	475	[1]
Financing Receivable, Nonaccrual, No Allowance	[1]	0	0
Finance Receivable, Nonaccrual, with allowance		$ 40	$ 475
[1]onaccrual balances at December 31, 2022 included $11.5 million of nonaccruing TDRs. (2) Nonaccrual balances reported above without an allowance for credit losses are attributable to loans evaluated on an individual basis where it was determined that there was no risk of loss due to sufficient underlying collateral values.

LOANS, ALLOWANCE FOR LOAN LOS_3

LOANS, ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY Foreclosed Residential Real Estate Property (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Foreclosed Residential Real Estate Property [Abstract]
Foreclosed residential real estate property held by the creditor	$ 110	$ 0
Mortgage Loans in Process of Foreclosure, Amount	$ 1,697	$ 1,615

Age Analysis of Past Due Financ

Age Analysis of Past Due Financing receivables (Details) $ in Thousands		Dec. 31, 2023 USD ($) loan	Dec. 31, 2022 USD ($) loan
Financing Receivable Impaired [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan		480	481
Financing Receivable, before Allowance for Credit Loss		$ 14,278,070	$ 13,928,675
Number of Financing Receivables Sixty to Eighty Nine Days Past Due | loan		29	35
Number Of Financing Receivables Equal To Greater Than Ninety Days | loan		40	46
Number of Loans Total Past Due | loan		549	562
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 23,616	$ 5,934
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		29,433	6,560
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		10,305	29,426
Financial Asset, Past Due
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		63,354	41,920
Financial Asset, Not Past Due
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 14,214,716	$ 13,886,755
Commercial and Industrial [Member]
Financing Receivable Impaired [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan		6	3
Financing Receivable, before Allowance for Credit Loss		$ 1,579,986	$ 1,635,103
Number of Financing Receivables Sixty to Eighty Nine Days Past Due | loan		1	1
Number Of Financing Receivables Equal To Greater Than Ninety Days | loan		2	3
Number of Loans Total Past Due | loan		9	7
Commercial and Industrial [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 398	$ 49
Commercial and Industrial [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		17,538	175
Commercial and Industrial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		673	23,726
Commercial and Industrial [Member] | Financial Asset, Past Due
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		18,609	23,950
Commercial and Industrial [Member] | Financial Asset, Not Past Due
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 1,561,377	$ 1,611,153
Commercial Real Estate [Member]
Financing Receivable Impaired [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan		8	7
Financing Receivable, before Allowance for Credit Loss		$ 8,041,508	$ 7,760,230
Number of Financing Receivables Sixty to Eighty Nine Days Past Due | loan		2	5
Number Of Financing Receivables Equal To Greater Than Ninety Days | loan		3	3
Number of Loans Total Past Due | loan		13	15
Commercial Real Estate [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 14,674	$ 2,052
Commercial Real Estate [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		8,419	4,971
Commercial Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		7,279	2,977
Commercial Real Estate [Member] | Financial Asset, Past Due
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		30,372	10,000
Commercial Real Estate [Member] | Financial Asset, Not Past Due
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 8,011,136	$ 7,750,230
Construction Loans [Member]
Financing Receivable Impaired [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan		0	0
Financing Receivable, before Allowance for Credit Loss		$ 849,586	$ 1,154,413
Number of Financing Receivables Sixty to Eighty Nine Days Past Due | loan		0	0
Number Of Financing Receivables Equal To Greater Than Ninety Days | loan		0	0
Number of Loans Total Past Due | loan		0	0
Construction Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 0	$ 0
Construction Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		0	0
Construction Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		0	0
Construction Loans [Member] | Financial Asset, Past Due
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		0	0
Construction Loans [Member] | Financial Asset, Not Past Due
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 849,586	$ 1,154,413
Small Business [Member]
Financing Receivable Impaired [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan		6	12
Financing Receivable, before Allowance for Credit Loss		$ 251,956	$ 219,102
Number of Financing Receivables Sixty to Eighty Nine Days Past Due | loan		1	3
Number Of Financing Receivables Equal To Greater Than Ninety Days | loan		6	3
Number of Loans Total Past Due | loan		13	18
Small Business [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 400	$ 111
Small Business [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		20	25
Small Business [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		243	5
Small Business [Member] | Financial Asset, Past Due
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		663	141
Small Business [Member] | Financial Asset, Not Past Due
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 251,293	$ 218,961
Residential Real Estate [Member]
Financing Receivable Impaired [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan		24	8
Financing Receivable, before Allowance for Credit Loss		$ 2,424,754	$ 2,035,524
Number of Financing Receivables Sixty to Eighty Nine Days Past Due | loan		7	8
Number Of Financing Receivables Equal To Greater Than Ninety Days | loan		13	16
Number of Loans Total Past Due | loan		44	32
Residential Real Estate [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 6,216	$ 1,654
Residential Real Estate [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		2,187	1,105
Residential Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		1,573	1,725
Residential Real Estate [Member] | Financial Asset, Past Due
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		9,976	4,484
Residential Real Estate [Member] | Financial Asset, Not Past Due
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 2,414,778	$ 2,031,040
Home Equity [Member]
Financing Receivable Impaired [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan		23	19
Financing Receivable, before Allowance for Credit Loss		$ 1,097,626	$ 1,088,750
Number of Financing Receivables Sixty to Eighty Nine Days Past Due | loan		4	3
Number Of Financing Receivables Equal To Greater Than Ninety Days | loan		10	17
Number of Loans Total Past Due | loan		37	39
Home Equity [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 1,640	$ 1,647
Home Equity [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		1,238	201
Home Equity [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		529	965
Home Equity [Member] | Financial Asset, Past Due
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		3,407	2,813
Home Equity [Member] | Financial Asset, Not Past Due
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 1,094,219	$ 1,085,937
Consumer Portfolio Segment [Member]
Financing Receivable Impaired [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan	[1]	413	432
Financing Receivable, before Allowance for Credit Loss	[1]	$ 32,654	$ 35,553
Number of Financing Receivables Sixty to Eighty Nine Days Past Due | loan	[1]	14	15
Number Of Financing Receivables Equal To Greater Than Ninety Days | loan	[1]	6	4
Number of Loans Total Past Due | loan	[1]	433	451
Consumer Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	[1]	$ 288	$ 421
Consumer Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	[1]	31	83
Consumer Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	[1]	8	28
Consumer Portfolio Segment [Member] | Financial Asset, Past Due
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	[1]	327	532
Consumer Portfolio Segment [Member] | Financial Asset, Not Past Due
Financing Receivable Impaired [Line Items]
Financing Receivable, before Allowance for Credit Loss	[1]	$ 32,327	$ 35,021
[1]Other consumer portfolio is inclusive of deposit account overdrafts recorded as loan balances.

TDR's and Other Pertinent Infor

TDR's and Other Pertinent Information (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Summary of Troubled Debt Restructurings and other pertinent information
Tdrs Recorded Investment On Accrual Status	$ 11,278
Tdrs Recorded Investment On Nonaccrual Status	11,520
Financing Receivable Recorded Investment Trouble Debt Restructuring	22,798
Additional Commitments To Lend To Borrower For Trouble Debt Restructuring	$ 64

Modification which Occurred Dur

Modification which Occurred During the Period & Change in Recorded Investment (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021 USD ($) contract	Dec. 31, 2023	Dec. 31, 2022 USD ($) contract	Dec. 31, 2021 USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	8		5
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 18,301		$ 11,316
Post-Modification Outstanding Recorded Investment	$ 18,301		11,315
Financing Receivable, Troubled Debt Restructuring, Increase (Decrease) from Modification			$ 11,315	$ 18,301
Commercial And Industrial [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	1		4
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 14,148		$ 3,466
Post-Modification Outstanding Recorded Investment	$ 14,148		$ 3,465
Commercial And Industrial [Member] | Contractual Interest Rate Reduction [Member] | Minimum [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification		7%
Commercial And Industrial [Member] | Contractual Interest Rate Reduction [Member] | Maximum [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification		10%
Commercial Real Estate [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	5		1
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 3,964		$ 7,850
Post-Modification Outstanding Recorded Investment	$ 3,964		$ 7,850
Small Business [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	2
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 189
Post-Modification Outstanding Recorded Investment	$ 189
Small Business [Member] | Contractual Interest Rate Reduction [Member] | Minimum [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification		6.50%
Small Business [Member] | Contractual Interest Rate Reduction [Member] | Maximum [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification		10%

LOANS, ALLOWANCE FOR LOAN LOS_4

LOANS, ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY (Details) - USD ($)		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Receivables [Abstract]
Days To Be Termed As Non Accrual Loans		90 days
Tdrs Recorded Investment On Nonaccrual Status			$ 11,520,000
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 14,278,070,000	13,928,675,000
Financing Receivable, Credit Loss, Expense (Reversal)		23,250,000	6,500,000	$ 18,205,000
Financing Receivable, Allowance for Credit Loss	[1]	14,278,070,000	13,928,675,000
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)		10,200,000
Off-Balance Sheet, Credit Loss, Liability		$ 1,500,000	1,300,000
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) by percentage		(6.70%)
Financing Receivable, Unamortized Loan Cost (Fee)		$ 6,400,000	5,000,000
Interest Receivable		60,200,000	$ 50,800,000	$ 43,700,000
Accounts Receivable, Noncurrent, Accrued Interest, Writeoff		$ 1,000,000
[1] (2) Other consumer portfolio is inclusive of deposit account overdrafts recorded as loan balances and the associated gross write-offs.

LOANS, ALLOWANCE FOR LOAN LOS_5

LOANS, ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY (Details) - USD ($) $ in Thousands		12 Months Ended
	Nov. 12, 2021	Dec. 31, 2023		Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff		$ (34,782)		$ (2,652)		$ (4,944)
Financing Receivable, Allowance for Credit Loss, Recovery		1,335		1,649		3,729
Contractual cash flows not expected to be collected	$ 16,540
Financing Receivable, Credit Loss, Expense (Reversal)		23,250		6,500		18,205
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		142,222	[1]	152,419	[1]	146,922	[1]	$ 113,392
Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff		(23,564)		0		(3,474)
Financing Receivable, Allowance for Credit Loss, Recovery		145		49		2,686
Contractual cash flows not expected to be collected	166
Financing Receivable, Credit Loss, Expense (Reversal)		15,103		13,108		(6,062)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		19,243	[1]	27,559	[1]	14,402	[1]	21,086
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff		(7,855)		(62)		0
Financing Receivable, Allowance for Credit Loss, Recovery		0		333		57
Contractual cash flows not expected to be collected	14,397
Financing Receivable, Credit Loss, Expense (Reversal)		4,204		(5,958)		24,023
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		74,148	[1]	77,799	[1]	83,486	[1]	45,009
Construction Loans [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff		0		0		0
Financing Receivable, Allowance for Credit Loss, Recovery		0		0		0
Contractual cash flows not expected to be collected	1,019
Financing Receivable, Credit Loss, Expense (Reversal)		(3,079)		(1,554)		5,900
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		7,683	[1]	10,762	[1]	12,316	[1]	5,397
Small Business [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff		(484)		(196)		(219)
Financing Receivable, Allowance for Credit Loss, Recovery		92		149		98
Contractual cash flows not expected to be collected	0
Financing Receivable, Credit Loss, Expense (Reversal)		1,521		(627)		(1,466)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		3,963	[1]	2,834	[1]	3,508	[1]	5,095
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff		0		0		0
Financing Receivable, Allowance for Credit Loss, Recovery		0		0		1
Contractual cash flows not expected to be collected	429
Financing Receivable, Credit Loss, Expense (Reversal)		2,664		6,489		(221)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		23,637	[1]	20,973	[1]	14,484	[1]	14,275
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff		(47)		(122)		(69)
Financing Receivable, Allowance for Credit Loss, Recovery		62		121		249
Contractual cash flows not expected to be collected	163
Financing Receivable, Credit Loss, Expense (Reversal)		1,278		(6,481)		(4,417)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		12,797	[1]	11,504	[1]	17,986	[1]	22,060
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Writeoff		(2,832)		(2,272)		(1,182)
Financing Receivable, Allowance for Credit Loss, Recovery		1,036		997		638
Contractual cash flows not expected to be collected	$ 366
Financing Receivable, Credit Loss, Expense (Reversal)		1,559		1,523		448
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest		$ 751	[1]	$ 988	[1]	$ 740	[1]	$ 470
[1] Balances of accrued interest receivable excluded from amortized cost and the calculation of allowance for credit losses amounted to $60.2 million, $50.8 million, and $43.7 million at December 31, 2023, 2022, and 2021, respectively.

LOANS, ALLOWANCE FOR LOAN LOS_6

LOANS, ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	$ 18,301		$ 11,315
Extended Maturity [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment		$ 28,748	11,315	$ 4,153
Combination Rate and Maturity member
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment			$ 0	$ 14,148

Financing Receivable Modifed (D

Financing Receivable Modifed (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	$ 18,301		$ 11,315
Extended Maturity [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment		$ 28,748	11,315	$ 4,153
Extended Maturity and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment		123
Term Extension and Other-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment		$ 8,370
Commercial And Industrial [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	14,148		3,465
Commercial And Industrial [Member] | Extended Maturity [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage		0.70%
Post-Modification Outstanding Recorded Investment		$ 11,010
Financing Receivable, Modified, Weighted Average Term Increase from Modification		2 months
Commercial And Industrial [Member] | Extended Maturity and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage		0.01%
Post-Modification Outstanding Recorded Investment		$ 85
Commercial And Industrial [Member] | Term Extension and Other-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage		0.12%
Post-Modification Outstanding Recorded Investment		$ 1,865
Commercial And Industrial [Member] | Contractual Interest Rate Reduction [Member] | Maximum [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification		10%
Commercial And Industrial [Member] | Contractual Interest Rate Reduction [Member] | Minimum [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification		7%
Commercial Real Estate [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	3,964		$ 7,850
Commercial Real Estate [Member] | Extended Maturity [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage		0.22%
Post-Modification Outstanding Recorded Investment		$ 17,530
Financing Receivable, Modified, Weighted Average Term Increase from Modification		1 year 10 months 24 days
Commercial Real Estate [Member] | Term Extension and Other-Than-Insignificant Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage		0.08%
Post-Modification Outstanding Recorded Investment		$ 6,505
Small Business [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Outstanding Recorded Investment	$ 189
Small Business [Member] | Extended Maturity [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage		0.08%
Post-Modification Outstanding Recorded Investment		$ 208
Financing Receivable, Modified, Weighted Average Term Increase from Modification		4 years 8 months 12 days
Small Business [Member] | Extended Maturity and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage		0.02%
Post-Modification Outstanding Recorded Investment		$ 38
Small Business [Member] | Contractual Interest Rate Reduction [Member] | Maximum [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification		10%
Small Business [Member] | Contractual Interest Rate Reduction [Member] | Minimum [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification		6.50%

Finance Receivables, Modified,

Finance Receivables, Modified, Past Due (Details) - Aging Loan Modification Member $ in Thousands	Dec. 31, 2023 USD ($)
Financial Asset, Not Past Due
Financing Receivable, Modified, Past Due [Line Items]
Total	$ 36,730
Financial Asset, Past Due
Financing Receivable, Modified, Past Due [Line Items]
Total	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total	511
Financial Asset, nonaccrual member
Financing Receivable, Modified, Past Due [Line Items]
Total	37,241
Commercial And Industrial [Member] | Financial Asset, Not Past Due
Financing Receivable, Modified, Past Due [Line Items]
Total	12,585
Commercial And Industrial [Member] | Financial Asset, Past Due
Financing Receivable, Modified, Past Due [Line Items]
Total	0
Commercial And Industrial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total	375
Commercial And Industrial [Member] | Financial Asset, nonaccrual member
Financing Receivable, Modified, Past Due [Line Items]
Total	12,960
Commercial Real Estate [Member] | Financial Asset, Not Past Due
Financing Receivable, Modified, Past Due [Line Items]
Total	23,899
Commercial Real Estate [Member] | Financial Asset, Past Due
Financing Receivable, Modified, Past Due [Line Items]
Total	0
Commercial Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total	136
Commercial Real Estate [Member] | Financial Asset, nonaccrual member
Financing Receivable, Modified, Past Due [Line Items]
Total	24,035
Small Business [Member] | Financial Asset, Not Past Due
Financing Receivable, Modified, Past Due [Line Items]
Total	246
Small Business [Member] | Financial Asset, Past Due
Financing Receivable, Modified, Past Due [Line Items]
Total	0
Small Business [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total	0
Small Business [Member] | Financial Asset, nonaccrual member
Financing Receivable, Modified, Past Due [Line Items]
Total	$ 246

Modified Loans that have subseq

Modified Loans that have subsequently defaulted (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 7,015
Extended Maturity [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	510
Term Extension and Other-Than-Insignificant Payment Delay
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	6,505	$ 1,400	$ 180
Commercial And Industrial [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	374
Commercial And Industrial [Member] | Extended Maturity [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	374
Commercial And Industrial [Member] | Term Extension and Other-Than-Insignificant Payment Delay
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	0
Commercial Real Estate [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	6,641
Commercial Real Estate [Member] | Extended Maturity [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	136
Commercial Real Estate [Member] | Term Extension and Other-Than-Insignificant Payment Delay
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 6,505

BANK PREMISES AND EQUIPMENT (De

BANK PREMISES AND EQUIPMENT (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Total cost	$ 338,404,000	$ 323,944,000
Accumulated depreciation	(145,355,000)	(127,440,000)
Net bank premises and equipment	193,049,000	196,504,000
Depreciation expense	18,900,000	18,400,000	$ 12,500,000
Rental Income, Nonoperating	6,400,000	6,100,000	$ 890,000
Land [Member]
Property, Plant and Equipment [Line Items]
Total cost	52,844,000	52,844,000
Bank Premises [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 99,973,000	97,760,000
Bank Premises [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Bank Premises [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	40 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 50,682,000	47,098,000
Leasehold Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	1 year
Leasehold Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	15 years
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 102,251,000	93,450,000
Furniture and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	1 year
Furniture and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	10 years
Machinery and Equipment
Property, Plant and Equipment [Line Items]
Total cost	$ 32,654,000	$ 32,792,000
Machinery and Equipment | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years

GOODWILL AND IDENTIFIABLE INT_3

GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Other Intangible Assets	$ 18,190	$ 25,068
Total goodwill and other intangible assets	1,003,262	1,010,140
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Other Intangible Assets	15,237	20,757
Other identifiable Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Other Intangible Assets	$ 2,953	$ 4,311

GOODWILL AND IDENTIFIABLE INT_4

GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 985,072	$ 985,072	$ 506,206
Goodwill, Acquired During Period	0	0	478,866
Goodwill, Ending Balance	$ 985,072	$ 985,072	$ 985,072

GOODWILL AND IDENTIFIABLE INT_5

GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS (Details 2) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 52,870	$ 52,870
Accumulated Amortization	(34,680)	(27,802)
Net Carrying Amount	18,190	25,068
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	46,770	46,770
Accumulated Amortization	(31,533)	(26,013)
Net Carrying Amount	15,237	20,757
Other intangible assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,100	6,100
Accumulated Amortization	(3,147)	(1,789)
Net Carrying Amount	$ 2,953	$ 4,311

GOODWILL AND IDENTIFIABLE INT_6

GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS (Details 3) $ in Thousands	Dec. 31, 2023 USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2019	$ 5,905
2020	4,716
2021	2,820
2022	2,077
2023	$ 1,377

GOODWILL AND IDENTIFIABLE INT_7

GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS (Details Textual)	3 Months Ended
	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period for intangible assets	9 years 6 months

DEPOSITS (Details)

DEPOSITS (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deposits [Abstract]
Deposit Liabilities, Collateral Issued, Financial Instruments	$ 900,200	$ 952,700
Time Deposits, Fiscal Year Maturity [Abstract]
1 year or less	2,056,543	953,214
Over 1 year to 2 years	97,055	150,102
Over 2 years to 3 years	15,594	66,995
Over 3 years to 4 years	8,585	15,172
Over 4 years to 5 years	3,702	10,258
Time Deposits	$ 2,181,479	$ 1,195,741
1 year or less (as percent)	94.30%	79.70%
Over 1 years to 2 years (as percent)	4.40%	12.50%
Over 2 years to 3 years (as percent)	0.70%	5.60%
Over 3 years to 4 years (as percent)	0.40%	1.30%
Over 4 years to 5 years (as percent)	0.20%	0.90%
Time Deposits (as percent)	100%	100%
Deposits over $250,000.00	$ 571,200	$ 251,100

BORROWINGS (FHLB Advances) (Det

BORROWINGS (FHLB Advances) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt Disclosure [Abstract]
Federal Home Loan Bank, Advances, Maturities Summary, Due in Next Twelve Months	$ 400,000
Federal Home Loan Bank, Advances, Activity for Year, Average Interest Rate for Year	5.50%
Debt Instrument, Unamortized Premium	$ 541	$ 637
FHLB table [Line Items]
Federal Home Loan Bank, Advance	$ 705,000
Federal Home Loan Bank, Advances, Interest Rate	5.54%
Federal Home Loan Bank, Advances, Maturities Summary, Due in Next Twelve Months	$ 400,000
Federal Home Loan Bank, Advances, Activity for Year, Average Interest Rate for Year	5.50%
Federal home loan Bank advances weighted Average Interest Rate inclusive of Swaps	3.83%
Debt Instrument, Unamortized Premium	$ 541	$ 637
Federal Home Loan Bank, Advances, Weighted Average Interest Rate, Index Amortizing	1.40%	1.65%
Federal Home Loan Bank, Advances, Index Amortizing	$ 1,105,541

BORROWINGS (Long-Term Debt) (De

BORROWINGS (Long-Term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Total Long-Term Borrowings	$ 112,838	$ 112,740
Subordinated Debt	49,980	49,885
Junior Subordinated Debentures [Member] | Capital Trust V Preferred Securities Due in 2037 [Member]
Debt Instrument [Line Items]
Total Long-Term Borrowings	51,517	51,514
Junior Subordinated Debentures [Member] | Central Bancorp Capital Trust I Securities Due in 2034 [Member]
Debt Instrument [Line Items]
Total Long-Term Borrowings	5,258	5,258
Junior Subordinated Debentures [Member] | Central Bancorp Capital Trust II Securities Due in 2037 [Member]
Debt Instrument [Line Items]
Total Long-Term Borrowings	$ 6,083	$ 6,083

BORROWINGS (Trust Preferred Sec

BORROWINGS (Trust Preferred Securities) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Junior Subordinated Debentures [Member]
Debt Instrument [Line Items]
Face Amount	$ 61	$ 61
Junior Subordinated Debentures [Member] | Capital Trust V Preferred Securities Due in 2037 [Member]
Debt Instrument [Line Items]
Face Amount	$ 50
Junior Subordinated Debentures [Member] | Capital Trust V Preferred Securities Due in 2037 [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate	1.48%
Fixed rate	7.13%
Junior Subordinated Debentures [Member] | Central Bancorp Capital Trust I Securities Due in 2034 [Member]
Debt Instrument [Line Items]
Face Amount	$ 5.1
Basis spread on variable rate	8.09%
Junior Subordinated Debentures [Member] | Central Bancorp Capital Trust I Securities Due in 2034 [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate	2.44%
Junior Subordinated Debentures [Member] | Central Bancorp Capital Trust II Securities Due in 2037 [Member]
Debt Instrument [Line Items]
Face Amount	$ 5.9
Junior Subordinated Debentures [Member] | Central Bancorp Capital Trust II Securities Due in 2037 [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate	1.65%
Fixed rate	7.30%
Subordinated Debt [Member] | Subordinated Debentures Due in November 2019 [Member] [Domain]
Debt Instrument [Line Items]
Fixed rate		4.75%

BORROWINGS (Details Textual)

BORROWINGS (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Subordinated Debt	$ 49,980	$ 49,885
Interest Expense, Long-term Debt	6,800	4,600	$ 4,500
Federal home loan bank unused remaining available borrowing capacity	2,700,000	1,800,000
Total Long-Term Borrowings	112,838	112,740
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 3,900,000	2,700,000
Subordinated Borrowing, Interest Rate	219%
Parent Company [Member] | Subordinated Debentures [Member]
Debt Instrument [Line Items]
Subordinated Debt	$ 50,000	50,000
Capital Trust V Preferred Securities Due in 2037 [Member] | Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Total Long-Term Borrowings	$ 51,517	51,514
Capital Trust V Preferred Securities Due in 2037 [Member] | Junior Subordinated Debt [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Debt Instrument, interest rate, stated rate inclusive of interest rate swap - expired	1.48%
Central Bancorp Capital Trust I Securities Due in 2034 [Member] | Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Total Long-Term Borrowings	$ 5,258	5,258
Debt Instrument, interest rate, stated rate inclusive of interest rate swap - expired	8.09%
Central Bancorp Capital Trust I Securities Due in 2034 [Member] | Junior Subordinated Debt [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Debt Instrument, interest rate, stated rate inclusive of interest rate swap - expired	2.44%
Single issuer trust preferred securities issued by banks [Member] | Junior Subordinated Debt [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Debt Instrument, interest rate, stated rate inclusive of interest rate swap - expired	5.65%
Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Federal home loan bank unused remaining available borrowing capacity	$ 1,600,000	$ 1,800,000

CUMULATIVELY GRANTED AWARDS (De

CUMULATIVELY GRANTED AWARDS (Details)	Dec. 31, 2023 shares
2005 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized Stock Awards	1,650,000
Cumulative Granted, Net of Forfeitures and Expirations	1,448,079
2005 Plan [Member] | Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cumulative Granted, Net of Forfeitures and Expirations	387,258
2005 Plan [Member] | Restricted stock awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cumulative Granted, Net of Forfeitures and Expirations	1,060,821
Two Thousand Eighteen Nonemployee Director Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized Stock Awards	300,000
Cumulative Granted, Net of Forfeitures and Expirations	50,767
Authorized but Unissued	249,233
Two Thousand Eighteen Nonemployee Director Stock Plan [Member] | Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cumulative Granted, Net of Forfeitures and Expirations	0
Two Thousand Eighteen Nonemployee Director Stock Plan [Member] | Restricted stock awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cumulative Granted, Net of Forfeitures and Expirations	50,767
2023 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized Stock Awards	1,126,886
Cumulative Granted, Net of Forfeitures and Expirations	9,640
Authorized but Unissued	1,117,246
2023 Omnibus Incentive Plan | Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cumulative Granted, Net of Forfeitures and Expirations	0
2023 Omnibus Incentive Plan | Restricted stock awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cumulative Granted, Net of Forfeitures and Expirations	9,640

PRE TAX EXPENSE (Details 1)

PRE TAX EXPENSE (Details 1) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock based award expense		$ 6,377	$ 4,464	$ 4,309
Related tax benefits recognized in earnings		1,793	1,255	1,212
Restricted stock awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock based award expense	[1]	5,777	3,791	3,580
Restricted stock awards [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock based award expense	[2]	$ 600	$ 673	$ 729
[1] Inclusive of compensation expense associated with time-vested and performance-based restricted stock awards. Expense related to awards issued to directors is recognized as directors’ fees within other noninterest expense.

STOCK OPTION AWARDS DURING PERI

STOCK OPTION AWARDS DURING PERIOD (Details 3) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	0	0

RELEVANT STOCK OPTION INFORMATI

RELEVANT STOCK OPTION INFORMATION (Details 4) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash received from stock option exercises	$ 80	$ 0
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of stock options vested based on grant date fair value	0	0	$ 0
Intrinsic value of stock options exercised	139	0	414
Cash received from stock option exercises	257	0	233
Share-based Payment Arrangement, Exercise of Option, Tax Benefit	$ 39	$ 0	$ 116

STOCK OPTION ROLLFORWARD (Detai

STOCK OPTION ROLLFORWARD (Details 5) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Dec. 31, 2023		Dec. 31, 2022
Stock Option Awards, Outstanding (in shares):
Granted		0		0
Stock Option Awards, Nonvested (in shares)
Granted		0		0
Stock options [Member]
Stock Option Awards, Outstanding (in shares):
Balance outstanding at beginning of period		20,000
Granted		0
Exercised		(6,666)
Balance outstanding at end of period		13,334	[1]	20,000
Weighted Average Exercise Price, Outstanding (in usd per share):
Balance outstanding at beginning of period		$ 56.18
Granted		0
Exercised		38.63
Balance outstanding at end of period		$ 64.94		$ 56.18
Balance at December 31, 2022, Weighted average remaining contractual term (years)		3 years 4 months 24 days
Balance at December 31, 2022, Aggregate Intrinsic Value	[2]	$ 62
Stock Option Awards, Nonvested (in shares)
Granted		0
[1] Represents vested stock options outstanding to Directors. The aggregate intrinsic value represents the total pre-tax intrinsic value, based on the average of the high price and low price at which the Company’s common stock traded on December 31, 2023 of $66.57, which would have been received by in-the-money option holders had they all exercised their options as of that date.

RSA GRANTS (Details 6)

RSA GRANTS (Details 6) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restricted stock awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 75.70
Restricted stock awards [Member] | Employee Stock Plan [Member] | 2/18/2021 | Ratably Over 5 Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted		49,550
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 81.84
Vesting terms		Ratably over 5 years from grant date
Restricted stock awards [Member] | Employee Stock Plan [Member] | 2/17/2022 | Ratably Over 5 Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted		52,100
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 84.70
Vesting terms		Ratably over 5 years from grant date
Restricted stock awards [Member] | Employee Stock Plan [Member] | 9/15/2022 | Ratably Over 5 Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted		646
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 77.44
Vesting terms		Ratably over 5 years from grant date
Restricted stock awards [Member] | Employee Stock Plan [Member] | 2/16/2023 | Ratably Over Period [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	12,309
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 80.65
Vesting terms	Ratably over 5 years beginning on February 6, 2023
Restricted stock awards [Member] | Employee Stock Plan [Member] | 2/16/2023 | Ratably Over 3 Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	77,525
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 80.65
Vesting terms	Ratably over 3 years from grant date
Restricted stock awards [Member] | Employee Stock Plan [Member] | 5/15/2023 | Ratably Over 3 Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	1,080
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 46.21
Vesting terms	Ratably over 3 years from grant date
Restricted stock awards [Member] | Two Thousand Eighteen Nonemployee Director Stock Plan [Member] | 5/25/2021 | Immediately upon grant date
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted			7,680
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 78.18
Vesting terms			Immediately upon grant date
Restricted stock awards [Member] | Two Thousand Eighteen Nonemployee Director Stock Plan [Member] | 9/1/2021 | Immediately upon grant date
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted			640
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 76.78
Vesting terms			Immediately upon grant date
Restricted stock awards [Member] | Two Thousand Eighteen Nonemployee Director Stock Plan [Member] | 5/24/2022 | Immediately upon grant date
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted		8,099
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 80.39
Vesting terms		Immediately upon grant date
Restricted stock awards [Member] | Two Thousand Eighteen Nonemployee Director Stock Plan [Member] | 5/23/2023 | Immediately upon grant date
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	12,410
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 48.35
Vesting terms	Immediately upon grant date
Restricted stock awards [Member] | 2023 Omnibus Incentive Plan | 5/30/2023 | Ratably Over 3 Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	890
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 45.09
Vesting terms	Ratably over 3 years from grant date
Restricted stock awards [Member] | 2023 Omnibus Incentive Plan | 9/15/2023 | Ratably Over 5 Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	5,270
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 51.44
Vesting terms	Ratably over 5 years from grant date
Restricted stock awards [Member] | 2023 Omnibus Incentive Plan | 9/15/2023 | Ratably Over 3 Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	3,020
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 51.44
Vesting terms	Ratably over 3 years from grant date
Restricted stock awards [Member] | 2023 Omnibus Incentive Plan | 12/15/2023 | Ratably Over 3 Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	460
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 66.24
Vesting terms	Ratably over 3 years from grant date
Performance Shares [Member] | Employee Stock Plan [Member] | 2/18/2021 | At The End of Period [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted			18,900
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 81.84
Vesting terms			The earlier of: the date on which it is determined if the performance goal has been achieved; or, March 31, 2024.
Performance Shares [Member] | Employee Stock Plan [Member] | 2/17/2022 | At The End of Period [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted		20,700
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 84.70
Vesting terms		The earlier of: the date on which it is determined if the performance goal has been achieved; or, March 31, 2025.
Performance Shares [Member] | Employee Stock Plan [Member] | 2/16/2023 | At The End of Period [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	32,200
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 80.65
Vesting terms	The earlier of: the date on which it is determined if the performance goal has been achieved; or, March 31, 2026.

FV OF RSA VESTS (Details 7)

FV OF RSA VESTS (Details 7) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restricted stock awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of restricted stock awards upon vesting	$ 5,003	$ 5,148	$ 5,754

RSA ROLLFORWARD (Details 8)

RSA ROLLFORWARD (Details 8) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) $ / shares shares
Oustanding (in shares):
Beginning balance	135,712
Ending balance	162,812
Restricted stock awards [Member]
Oustanding (in shares):
Beginning balance	191,412
Granted	145,164
Vested/Released	(70,194)
Forfeited	(49,175)	[1]
Ending balance	217,207
Weighted Average Grant Price (in usd per share):
Beginning balance | $ / shares	$ 80.15
Granted | $ / shares	75.70
Vested/Released | $ / shares	71.94
Forfeited | $ / shares	80.93
Ending balance | $ / shares	$ 79.65
Unrecognized compensation cost (in thousands) (2) | $	$ 10,222
Weighted average remaining recognition period (years)	2 years 5 months 23 days
Performance Shares [Member]
Oustanding (in shares):
Forfeited	(3,220)
[1] Forfeited amounts are inclusive of 3,220 performance-based shares that were not vested based on performance objective criteria results, and 17,405 performance-based shares that were cancelled based on the departure of certain executives of the Company. (2) There are no unvested restricted stock awards outstanding to Directors and therefore no related unrecognized compensation cost for Directors.

STOCK BASED COMPENSATION (Detai

STOCK BASED COMPENSATION (Details Textual) - $ / shares		12 Months Ended
		Dec. 31, 2023		Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		162,812		135,712
Share Based Compensation Arrangement By Share Based Payment Award Options Price Per Share Common Stock Average High And Low Price Intrinsic Value		$ 66.57
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		13,334	[1]	20,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		217,207		191,412
Weighted average remaining recognition period (years)		2 years 5 months 23 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	[2]	49,175
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period		3,220
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period Due To Departure Of Executives		17,405
Two Thousand Eighteen Nonemployee Director Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized		300,000
Two Thousand Five Amended and Restated Employee Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized		1,650,000
[1] Represents vested stock options outstanding to Directors. Forfeited amounts are inclusive of 3,220 performance-based shares that were not vested based on performance objective criteria results, and 17,405 performance-based shares that were cancelled based on the departure of certain executives of the Company. (2) There are no unvested restricted stock awards outstanding to Directors and therefore no related unrecognized compensation cost for Directors.

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities (Derivative Positions for Interest Rate Swaps which Qualify as Hedges) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Interest rate swaps on borrowings [Member]
Details of derivative positions for interest rate swaps which qualify as hedges for accounting purposes
Fair Value	$ 1,901
Derivative, Notional Amount	$ 400,000
Derivative, Average Remaining Maturity	2 years 6 months 29 days
Derivative, Average Variable Interest Rate	5.34%
Derivative, Average Fixed Interest Rate	3.67%
Interest rate swaps on loans [Member]
Details of derivative positions for interest rate swaps which qualify as hedges for accounting purposes
Fair Value	$ (27,350)	$ (42,005)
Derivative, Notional Amount	$ 850,000	$ 1,050,000
Derivative, Average Remaining Maturity	2 years 6 months	2 years 11 months 19 days
Derivative, Average Variable Interest Rate	5.36%	4.24%
Derivative, Average Fixed Interest Rate	2.72%	2.66%
Interest rate collars on loans [Member]
Details of derivative positions for interest rate swaps which qualify as hedges for accounting purposes
Fair Value	$ (4,714)	$ (10,239)
Derivative, Notional Amount	$ 350,000	$ 400,000
Derivative, Average Remaining Maturity	1 year 5 months 23 days	2 years 3 months 7 days
Derivative, Average Variable Interest Rate	5.45%	4.22%
Derivative, Cap Interest Rate	3.09%	3.09%
Derivative, Floor Interest Rate	2.12%	2.19%
Interest Rate Swap [Member]
Details of derivative positions for interest rate swaps which qualify as hedges for accounting purposes
Fair Value	$ (30,163)	$ (52,244)
Derivative, Notional Amount	$ 1,600,000	$ 1,450,000

Derivatives and Hedging Activ_4

Derivatives and Hedging Activities (Customer Related Derivative Positions - Not Designated as Hedges) (Details) - Not Designated as Hedging Instrument [Member] $ in Thousands		Dec. 31, 2023 USD ($) position	Dec. 31, 2022 USD ($) position
Receive fixed, pay variable | Loan level swaps
Summary of customer related derivative positions, not designated as hedging
Number of Positions (1) | position	[1]	281	283
Less than 1 year		$ 80,682	$ 80,531
Less than 2 years		252,260	96,613
Less than 3 years		223,928	256,924
Less than 4 years		230,513	193,096
Thereafter		997,108	1,016,312
Derivative, Notional Amount		1,784,491	1,643,476
Fair Value		$ (88,415)	$ (118,930)
Pay fixed, receive variable | Loan level swaps
Summary of customer related derivative positions, not designated as hedging
Number of Positions (1) | position	[1]	281	283
Less than 1 year		$ 80,682	$ 80,531
Less than 2 years		252,260	96,613
Less than 3 years		223,928	256,924
Less than 4 years		230,513	193,096
Thereafter		997,108	1,016,312
Derivative, Notional Amount		1,784,491	1,643,476
Fair Value		$ 88,280	$ 118,928
Buys foreign currency, sells U.S. currency | Foreign exchange contracts
Summary of customer related derivative positions, not designated as hedging
Number of Positions (1) | position	[1]	22	49
Less than 1 year		$ 65,586	$ 124,982
Less than 2 years		12,957	13,363
Less than 3 years		0	0
Less than 4 years		0	0
Thereafter		0	0
Derivative, Notional Amount		78,543	138,345
Fair Value		$ 2,197	$ 306
Buys U.S. currency, sells foreign currency | Foreign exchange contracts
Summary of customer related derivative positions, not designated as hedging
Number of Positions (1) | position	[1]	22	49
Less than 1 year		$ 65,586	$ 124,982
Less than 2 years		12,957	13,363
Less than 3 years		0	0
Less than 4 years		0	0
Thereafter		0	0
Derivative, Notional Amount		78,543	138,345
Fair Value		$ (2,160)	$ (232)
Risk Participated Out [Member] | Risk Participation Agreement [Member]
Summary of customer related derivative positions, not designated as hedging
Number of Positions (1) | position	[1]	17	13
Less than 1 year		$ 0	$ 2,595
Less than 2 years		24,193	0
Less than 3 years		0	24,538
Less than 4 years		13,119	0
Thereafter		114,027	95,514
Derivative, Notional Amount		151,339	122,647
Fair Value		$ 200	$ 161
Risk Participated In [Member] | Risk Participation Agreement [Member]
Summary of customer related derivative positions, not designated as hedging
Number of Positions (1) | position	[1]	8	6
Less than 1 year		$ 0	$ 27,365
Less than 2 years		0	0
Less than 3 years		13,016	0
Less than 4 years		18,989	0
Thereafter		15,725	25,849
Derivative, Notional Amount		47,730	53,214
Fair Value		$ (44)	$ (15)
[1]The Company may enter into one dealer swap agreement which offsets multiple commercial borrower swap agreements.

Derivatives and Hedging Activ_5

Derivatives and Hedging Activities (FV of Derivative Financial Instruments and Classification on Balance Sheet) (Details) - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022		Dec. 31, 2021
Fair value of derivative financial instruments as well as their classification on the balance sheet
Derivative Liability, Fair Value, Amount Offset Against Collateral		$ 96,490	$ 126,647
Derivative, Collateral, Obligation to Return Cash		17,076	17,720
Derivative Asset, Fair Value, Amount Offset Against Collateral		26,601	32,435
Interest Receivable		60,200	50,800		$ 43,700
Derivative, Collateral, Obligation to Return Securities	[1]	12,018	20,019
Derivative, Collateral, Right to Reclaim Cash		0	0
Derivative, Collateral, Right to Reclaim Securities	[1]	12,018	20,019
Derivative Asset, Subject to Master Netting Arrangement, after Offset		55,695	70,174
Derivative Liability, Subject to Master Netting Arrangement, after Offset		108,508	146,666
Other Assets [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value		102,021	127,958
Total		103,948	127,958
Other Liabilities [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value		101,778	127,667
Total		133,868	179,911
Interest rate derivatives
Fair value of derivative financial instruments as well as their classification on the balance sheet
Interest Receivable		316
Interest rate derivatives | Derivatives designated as hedges: [Member] | Other Assets [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Interest Rate Derivative Assets, at Fair Value	[2],[3]	1,927	0
Interest rate derivatives | Derivatives designated as hedges: [Member] | Other Liabilities [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Interest rate derivatives	[4],[5]	32,090	52,244
Loan level swaps
Fair value of derivative financial instruments as well as their classification on the balance sheet
Interest Receivable		3,000	2,200
Loan level swaps | Other Assets [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Total	[2],[3]	99,416	123,372
Loan level swaps | Other Liabilities [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Total	[4],[5]	99,551	123,374
Foreign exchange contracts | Other Assets [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Total		2,220	4,352	[2]
Foreign exchange contracts | Other Liabilities [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Total		2,183	4,278	[4]
Mortgage Derivatives | Derivatives not designated as hedges: [Member] | Other Assets [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Forward sale hedge commitments	[2]	17	30
Interest rate lock commitments	[2]	168	43
Mortgage Derivatives | Derivatives not designated as hedges: [Member] | Other Liabilities [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Interest rate lock commitments	[4]	0	0
Forward sale hedge commitments	[4]	0	0
CME [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Derivative, Collateral, Obligation to Return Cash	[6]	(48,253)	(57,784)
Derivative, Collateral, Right to Reclaim Cash	[6]	25,360	33,245
Risk Participation Agreement [Member] | Other Assets [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Credit Risk Derivative Assets, at Fair Value	[2]	200	161
Risk Participation Agreement [Member] | Other Liabilities [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Credit Risk Derivative Liabilities, at Fair Value	[4]	44	15
Derivative Financial Instruments, Assets [Member] | Fair Value, Recurring [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Total		103,948	127,958
Derivative Financial Instruments, Assets [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of derivative financial instruments as well as their classification on the balance sheet
Total		$ 103,948	$ 127,958
[1] Reflects offsetting derivative positions with the same counterparty that are not netted on the balance sheet. Netting adjustments represent the amounts recorded to convert derivative assets and liabilities cleared through CME from a gross basis to a net basis, inclusive of the variation margin payments, in accordance with applicable accounting guidance.

Derivatives and Hedging Activ_6

Derivatives and Hedging Activities (Derivative Financial Instruments included in OCI and Current Earnings) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	$ (27,414)	$ 5,054	$ 18,691
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	16,055	(50,767)	(19,139)
Derivatives designated as hedges: [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax		5,054
Derivatives not designated as hedges: [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other income	(50)	(687)	(4,913)
Other Expense [Member] | Derivatives not designated as hedges: [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other income	(679)	(268)	(405)
Other Income [Member] | Derivatives not designated as hedges: [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other income	517	260	217
Mortgage banking income | Derivatives not designated as hedges: [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Increase Decrease In Fair Value Of Unhedged Derivative Instruments Relating To Residential Loans	112	(679)	(4,725)
Derivatives designated as hedges: [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	$ 16,055	$ (50,767)	$ (19,139)

Derivatives and Hedging Activ_7

Derivatives and Hedging Activities (Textual) (Details) - USD ($)		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Derivative, Collateral, Right to Reclaim Cash		$ 0	$ 0
Increase (Decrease) in Loans Held-for-sale		97,000	(452,000)	$ (1,679,000)
Exposure to Institutional Counterparties		$ 95,800,000	121,200,000
Maximum length of time Company is currently hedging its exposure		5 years 2 months 12 days
Customer related positions		$ 5,600,000	2,200,000
Gain (Loss) on Sales of Loans, Net		1,000,000	562,000	19,900,000
Fair Value Hedges, Net		0	0
Interest Receivable		60,200,000	50,800,000	$ 43,700,000
Derivative, Net Liability Position, Aggregate Fair Value		0	0
Interest Income [Member]
Derivative [Line Items]
Interest expense		3,900,000
Interest Expense [Member]
Derivative [Line Items]
Interest expense		(19,900,000)
CME [Member]
Derivative [Line Items]
Derivative, Collateral, Right to Reclaim Cash	[1]	25,360,000	33,245,000
Loan level swaps
Derivative [Line Items]
Interest Receivable		3,000,000	2,200,000
Interest Payable, Current		(3,000,000)	(2,200,000)
Interest Rate Swap [Member]
Derivative [Line Items]
Interest Receivable		316,000
Interest Payable, Current		(1,900,000)	(1,300,000)
Derivative, Notional Amount		1,600,000,000	$ 1,450,000,000
Interest rate swaps on borrowings [Member]
Derivative [Line Items]
Derivative, Notional Amount		$ 400,000,000
[1] Netting adjustments represent the amounts recorded to convert derivative assets and liabilities cleared through CME from a gross basis to a net basis, inclusive of the variation margin payments, in accordance with applicable accounting guidance.

INCOME TAXES - Schedule of Comp

INCOME TAXES - Schedule of Components of Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current expense
Federal	$ 51,771	$ 60,216	$ 21,539
State	21,123	24,979	11,054
Total current expense	72,894	85,195	32,593
Deferred expense (benefit)
Federal	1,336	(970)	3,032
State	1,402	(284)	58
Total deferred expense (benefit)	2,738	(1,254)	3,090
Income tax benefit	$ 75,632	$ 83,941	$ 35,683

INCOME TAXES - Schedule of Inco

INCOME TAXES - Schedule of Income Tax Rates (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Computed statutory federal income tax provision	$ 66,178	$ 73,028	$ 32,902
State taxes, net of federal tax benefit	17,992	19,728	8,754
Low Income Housing Project Investments	(3,740)	(3,364)	(2,308)
Nontaxable interest, net	(3,508)	(3,191)	(1,022)
Increase in cash surrender value of life insurance	(2,133)	(1,885)	(1,405)
Effective Income Tax Rate Reconciliation, Increase in uncertain positions, amount	$ (655)	$ (1,035)	$ 50
Effective Income Tax Rate Reconciliation, Revaluation of Net Deferred Tax Asset, Percent	0.08%	0%	0%
Effective Income Tax Rate Reconciliation, Revaluation of Net Deferred Tax Assets	$ 255	$ 0	$ 0
Stock-based compensation	(127)	(202)	(372)
Change in valuation allowance	$ 109	$ 52	$ 26
Other tax credits	(0.02%)	0%	0%
Merger and other related costs (non-deductible)	$ 0	$ 0	$ 630
Other tax credits	(76)	0	0
Other, net	1,337	810	(1,572)
Income tax benefit	$ 75,632	$ 83,941	$ 35,683
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Computed statutory federal income tax provision	21%	21%	21%
State taxes, net of federal tax benefit	5.71%	5.67%	5.59%
Low Income Housing Project Investments	(1.19%)	(0.97%)	(1.47%)
Nontaxable interest, net	(1.11%)	(0.92%)	(0.65%)
Increase in cash surrender value of life insurance	(0.68%)	(0.54%)	(0.90%)
Increase (decrease) in uncertain positions	(0.21%)	(0.30%)	0.03%
Stock-based compensation	(0.04%)	(0.06%)	(0.24%)
Change in valuation allowance	0.03%	0.01%	0.02%
Merger and other related costs (non-deductible)	0%	0%	0.40%
Other, net	0.43%	0.25%	(1.00%)
Total expense	24%	24.14%	22.78%

INCOME TAXES - Schedule of Net

INCOME TAXES - Schedule of Net Deferred Tax Asset (Details 2) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets
Accrued expenses not deducted for tax purposes	$ 14,646	$ 16,162
Allowance for credit losses	38,774	42,748
Deferred Tax Assets, Derivative Instruments	7,825	14,328
Employee and director equity compensation	1,660	1,388
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	89	89
Loan basis difference fair value adjustment	1,811	2,273
Deferred Tax Assets, Operating Loss Carryforwards	633	606
Deferred Tax Assets, Unrealized Losses on Available-for-Sale Securities, Gross	29,536	38,968
Deferred Tax Asset, Operating Lease Liability	15,387	17,069
Other	587	791
Gross deferred tax assets	110,948	134,422
Deferred Tax Assets, Valuation Allowance	(467)	(358)
Deferred Tax Assets, Net of Valuation Allowance	110,481	134,064
Deferred tax liabilities
Core deposit and other intangibles	2,865	4,137
Deferred loan fees, net	8,160	8,281
Deferred Tax Liabilities, Derivatives	0	0
Fixed assets	16,606	18,132
Goodwill	11,291	11,432
Deferred Tax Liabilities, Prepaid Expenses	3,482	3,469
Deferred Tax Liabilities, Leasing Arrangements	14,781	16,565
Other	1,884	2,112
Gross deferred tax liabilities	59,069	64,128
Total net deferred tax asset	$ 51,412	$ 69,936

INCOME TAXES - Reconciliation o

INCOME TAXES - Reconciliation of Unrecognized Tax Benefits (Details 3) - 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]
Beginning Balance	$ 2,720	$ 2,878	$ 474
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	959	1,047	29
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions		128
Increase for current year tax positions		761	2,433
Ending Balance	1,761	2,720	2,878
Acquired unrecognized tax benefits, income tax penalties and interest accrued	$ 0	$ 0	$ 756

Income Taxes - Schedule of chan

Income Taxes - Schedule of changes in accrued interest and penalties related to uncertain tax positions (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 689,000	$ 585,000	$ 920,000	$ 95,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	104,000	(335,000)	69,000
Acquired unrecognized tax benefits, income tax penalties and interest accrued	$ 0	$ 0	$ 756,000

INCOME TAXES (Details Textual)

INCOME TAXES (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount	$ 343,000	$ 544,000	$ 604,000

LOW INCOME HOUSING PROJECT IN_3

LOW INCOME HOUSING PROJECT INVESTMENTS Low Income Housing Project Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Original Investment in Low Income Housing Projects	$ 229,015	$ 197,124	$ 179,481
Amortization Method Qualified Affordable Housing Project Investments	156,984	139,454	135,497
Qualified Affordable Housing Project Investments, Commitment	58,731	57,913	73,336
Affordable Housing Tax Credits and Other Tax Benefits, Amount	18,101	17,011	14,198
Amortization Method Qualified Affordable Housing Project Investments, Amortization	14,360	13,647	11,892
Income (Loss) from Affordable Housing Projects, Equity Method Investments	$ 3,740	$ 3,364	$ 2,306

EMPLOYEE BENEFIT PLANS (Details

EMPLOYEE BENEFIT PLANS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Multiemployer Plans [Line Items]
Multiemployer Plans, Funded Status [Fixed List]	At least 80 percent	At least 80 percent
FIP/RP Status Pending/Implemented	No
Surcharge Imposed	No
Expiration Date of Collective-Bargaining Agreement	N/A
Minimum Contributions Required for Future Periods	$ 0
Supplemental Executive Retirement Plans [Member]
Multiemployer Plans [Line Items]
Defined Benefit Plan, Benefit Obligation	16,394,000	$ 15,711,000	$ 19,498,000	$ 20,752,000
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	1,060,000
Defined Benefit Plan, Plan Assets, Contributions by Employer	450,000	$ 475,000	$ 475,000
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	$ 1,047,000

Pension Plan Contributions (Det

Pension Plan Contributions (Details) - Pension Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Multiemployer Plans [Line Items]
Multiemployer Plan, Employer Contribution, Cost	$ 476	$ 499	$ 626
Multiemployer Plan Year Allocation One [Member]
Multiemployer Plans [Line Items]
Multiemployer Plan, Employer Contribution, Cost	$ 476
Multiemployer Plan Year Allocation Two [Member]
Multiemployer Plans [Line Items]
Multiemployer Plan, Employer Contribution, Cost		$ 499
Multiemployer Plan Year Allocation Three [Member]
Multiemployer Plans [Line Items]
Multiemployer Plan, Employer Contribution, Cost			$ 626

EMPLOYEE BENEFIT PLANS BHBK Pen

EMPLOYEE BENEFIT PLANS BHBK Pension Plan Benefits Table (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 20,000	$ 18,600
Other Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	9,632	9,889	$ 14,099	$ 12,225
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	509	(2,126)	1,480
Employer contribution	0	0	950
Defined Benefit Plan, Plan Assets, Benefits Paid	766	2,084	556
Defined Benefit Plan, Benefit Obligation	8,385	8,716	13,939	$ 15,052
Defined Benefit Plan, Interest Cost	420	366	344
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	15	(3,505)	(901)
Defined Benefit Plan, Benefit Obligation, Benefits Paid	766	2,084	556
Defined Benefit Plan, Funded (Unfunded) Status of Plan	$ 1,247	$ 1,173	$ 160

EMPLOYEE BENEFIT PLANS BHBK P_2

EMPLOYEE BENEFIT PLANS BHBK Pension Plan Net Periodic Pension Benefit Cost (Details) - Other Pension Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Interest Cost	$ 420	$ 366	$ 344
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(144)	(966)	(891)
Defined Benefit Plan, Amortization of Gain (Loss)	(17)	28	208
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	(25)	(31)	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 234	$ (603)	$ (339)

EMPLOYEE BENEFIT PLANS BHBK Sch

EMPLOYEE BENEFIT PLANS BHBK Schedule of Allocation of Plan Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan, Plan Assets, Category [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 20,000	$ 18,600
Other Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 9,632	$ 9,889	$ 14,099	$ 12,225

EMPLOYEE BENEFIT PLANS BHBK P_3

EMPLOYEE BENEFIT PLANS BHBK Pension Plan Expected Future Benefit Payments (Details) - Other Pension Plan [Member] $ in Thousands	Dec. 31, 2023 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 509
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	461
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	462
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	490
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	483
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 2,600

SERP Expense and Contributions

SERP Expense and Contributions paid (Details) - USD ($)	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]
Pension Cost (Reversal of Cost)	$ 487,000	$ 562,000	$ 1,200,000
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension Cost (Reversal of Cost)	703,000	1,681,000	2,275,000
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 450,000	$ 475,000	$ 475,000

Expected future benefit payment

Expected future benefit payments under SERP (Details) - Supplemental Executive Retirement Plans [Member] $ in Thousands	Dec. 31, 2023 USD ($)
Defined Benefit Plan Disclosure [Line Items]
2023	$ 1,277
2024	1,094
2025	1,091
2026	1,060
2027	1,047
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 5,685

SERP Benefits Table (Details)

SERP Benefits Table (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Change in plan assets
Fair value of plan assets at beginning of year	$ 18,600
Fair value of plan assets at end of year	20,000	$ 18,600
Supplemental Executive Retirement Plans [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	15,711	19,498	$ 20,752
Service cost	380	561	574
Interest cost	761	492	424
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(8)	(4,365)	(1,777)
Accumulated benefit obligation at end of year	16,394	15,711	19,498
Defined Benefit Plan, Benefit Obligation, Benefits Paid	(450)	(475)	(475)
Change in plan assets
Employer contribution	450	475	475
Defined Benefit Plan, Plan Assets, Benefits Paid	(450)	(475)	(475)
Funded status at end of year	(16,394)	(15,711)	(19,498)
Assets for Plan Benefits, Defined Benefit Plan	0	0	0
Liabilities	(16,394)	(15,711)	(19,498)
Funded status at end of year	(16,394)	(15,711)	(19,498)
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax [Abstract]
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax	(1,518)	(1,970)	3,002
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax		22	43
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	(1,518)	(1,948)	3,045
Information for plans with an accumulated benefit obligation in excess of plan assets
Projected benefit obligation	16,394	15,711	19,498
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation	16,394	15,711	19,498
Net periodic benefit cost
Service cost	380	561	574
Interest cost	761	492	424
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	22	22	174
Defined Benefit Plan, Amortization of Gain (Loss)	(460)	606	1,103
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 703	$ 1,681	$ 2,275
Minimum [Member] | Supplemental Executive Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.62%	4.67%	1.28%
Defined Benefit Plan, Expected Amortization, Next Fiscal Year [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.67%	1.28%	0.43%
Maximum [Member] | Supplemental Executive Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.75%	4.93%	2.57%
Defined Benefit Plan, Expected Amortization, Next Fiscal Year [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.93%	2.57%	2.18%

EMPLOYEE BENEFIT PLANS (Detai_2

EMPLOYEE BENEFIT PLANS (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Contribution Plan Disclosure [Line Items]
Incentive plans and discretionary bonus expense	$ 18,600,000	$ 24,300,000	$ 21,200,000
Employer matching contribution percent	25%
Employee contribution percent	6%
Nondiscretionary requisite service period	1 year
Defined Contribution Plan, Nondiscretionary Requisite service hours	1,000
DefinedContributionPlanEmployerSafeHarborContributionAmount	3%
Nondiscretionary employer contribution, percent up to social security limit	2%
Nondiscretionary employer contribution, percent over social security limit	5%
Deferred Compensation Arrangement with Individual, Contributions by Employer	$ 0	113,000	84,000
Multiemployer Plans [Abstract]
Significance of contributions percentage	5%
Defined benefit plan expense	$ 487,000	562,000	1,200,000
Supplemental Executive Retirement Plans [Abstract]
Plan assets	20,000,000	18,600,000
401(k) Restoration Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan expense	524,000	505,000	303,000
Employee Savings Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan expense	9,300,000	8,700,000	7,800,000
Executive Vice President [Member]
Defined Contribution Plan Disclosure [Line Items]
Supplemental Unemployment Benefits, Salary Continuation	$ 217,000	$ 213,000	$ 210,000
Other Pension Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.97%	2.68%	2.35%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	1.50%	7%	7%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.77%	4.97%
Supplemental Executive Retirement Plans [Abstract]
Plan assets	$ 9,632,000	$ 9,889,000	$ 14,099,000	$ 12,225,000

Recurring and Nonrecurring basi

Recurring and Nonrecurring basis (Details) - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading		$ 4,987	$ 3,888
Equity Securities, FV-NI		22,510	21,119
Debt Securities, Available-for-Sale		1,334,256	1,399,154
US Government Agencies Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		207,138	202,300
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		277,047	313,688
Pooled Trust Preferred Securities Issued By Banks And Insurers [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		1,018	1,034
Small Business Administration Pooled Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		46,572	51,757
US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		769,102	791,341
Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading		4,987	3,888
Assets and liabilities measured at fair value on a recurring basis
Assets and Liabilities Fair Value Disclosure Recurring		1,338,201	1,375,011
Fair Value, Recurring [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		22,510	21,119
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		207,138	202,300
Fair Value, Recurring [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		277,047	313,688
Fair Value, Recurring [Member] | Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		33,189	38,843
Fair Value, Recurring [Member] | Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		190	191
Fair Value, Recurring [Member] | Pooled Trust Preferred Securities Issued By Banks And Insurers [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		1,018	1,034
Fair Value, Recurring [Member] | Small Business Administration Pooled Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		46,572	51,757
Fair Value, Recurring [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure		6,368	2,803
Fair Value, Recurring [Member] | Derivative Financial Instruments, Assets [Member]
Assets and liabilities measured at fair value on a recurring basis
Total		103,948	127,958
Fair Value, Recurring [Member] | Derivative Financial Instruments, Liabilities [Member]
Assets and liabilities measured at fair value on a recurring basis
Financial and Nonfinancial Liabilities, Fair Value Disclosure		133,868	179,911
Fair Value, Recurring [Member] | US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		769,102	791,341
Fair Value, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Trading		4,987	3,888
Assets and liabilities measured at fair value on a recurring basis
Assets and Liabilities Fair Value Disclosure Recurring		27,497	25,007
Fair Value, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		22,510	21,119
Fair Value, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | US Government Agencies Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		0	0
Fair Value, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		0	0
Fair Value, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		0	0
Fair Value, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		0	0
Fair Value, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Pooled Trust Preferred Securities Issued By Banks And Insurers [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		0	0
Fair Value, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Small Business Administration Pooled Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		0	0
Fair Value, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		0	0
Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets and liabilities measured at fair value on a recurring basis
Assets and Liabilities Fair Value Disclosure Recurring		1,310,704	1,350,004
Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | US Government Agencies Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		207,138	202,300
Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		277,047	313,688
Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		33,189	38,843
Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		190	191
Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Pooled Trust Preferred Securities Issued By Banks And Insurers [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		1,018	1,034
Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Small Business Administration Pooled Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		46,572	51,757
Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure		6,368	2,803
Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Derivative Financial Instruments, Assets [Member]
Assets and liabilities measured at fair value on a recurring basis
Total		103,948	127,958
Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Derivative Financial Instruments, Liabilities [Member]
Assets and liabilities measured at fair value on a recurring basis
Financial and Nonfinancial Liabilities, Fair Value Disclosure		133,868	179,911
Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		769,102	791,341
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI		0	0
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | US Government Agencies Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		0	0
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		0	0
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		0	0
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		0	0
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Pooled Trust Preferred Securities Issued By Banks And Insurers [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		0	0
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Small Business Administration Pooled Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		0	0
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-Sale		0	0
Fair Value, Nonrecurring [Member]
Assets and liabilities measured at fair value on a recurring basis
Assets And Liabilities Fair Value Disclosure Nonrecurring		28,881	16,092
Fair Value, Nonrecurring [Member] | Collateral Dependent Loans [Member]
Assets and liabilities measured at fair value on a recurring basis
Assets, Fair Value Disclosure		28,881	16,092
Fair Value, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets and liabilities measured at fair value on a recurring basis
Assets And Liabilities Fair Value Disclosure Nonrecurring		28,881	16,092
Fair Value, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Collateral Dependent Loans [Member]
Assets and liabilities measured at fair value on a recurring basis
Assets, Fair Value Disclosure	[1]	$ 28,881	$ 16,092
[1] The carrying value of individually assessed collateral dependent loans is based on the lower of amortized cost or fair value of the underlying collateral less costs to sell. The fair value of the underlying collateral is generally determined through independent appraisals, which generally include various Level 3 inputs which are not identifiable. Appraisals may be adjusted by management for qualitative factors such as economic factors and estimated liquidation expenses. The range of these possible adjustments may vary.

Fair value disclosure only tabl

Fair value disclosure only table (Details) - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-maturity		$ 1,569,107	$ 1,705,120
Loans and Leases Receivable, Net Amount		14,135,848	13,776,256
Securities held to maturity, fair value		1,417,608	1,524,710
Federal Home Loan Bank Stock		43,557	5,218
Bank Owned Life Insurance		297,387	293,323
Liabilities, Fair Value Disclosure [Abstract]
Federal Home Loan Bank borrowings		1,105,541	637
Subordinated Debt		49,980	49,885
Deposits [Member]
Liabilities, Fair Value Disclosure [Abstract]
Financial Liabilities Book Value		12,684,068	14,683,266
Accrued Liabilities, Fair Value Disclosure	[1]	12,684,068	14,683,266
Bank Time Deposits [Member]
Liabilities, Fair Value Disclosure [Abstract]
Financial Liabilities Book Value		2,181,479	1,195,741
Accrued Liabilities, Fair Value Disclosure	[2]	2,166,573	1,164,892
Federal Home Loan Bank Advances [Member]
Liabilities, Fair Value Disclosure [Abstract]
Federal Home Loan Bank borrowings		1,105,541	637
Federal Home Loan Bank Borrowings, Fair Value Disclosure	[2]	1,103,845	563
Junior Subordinated Debt [Member]
Liabilities, Fair Value Disclosure [Abstract]
Junior subordinated debentures (less unamortized debt issuance costs of $30 and $33)		62,858	62,855
Accrued Liabilities, Fair Value Disclosure	[3]	58,911	60,002
Subordinated Debt [Member]
Liabilities, Fair Value Disclosure [Abstract]
Subordinated Debt		49,980	49,885
Accrued Liabilities, Fair Value Disclosure	[2]	49,613	45,891
Significant Other Observable Inputs (Level 2) [Member] | Deposits [Member]
Liabilities, Fair Value Disclosure [Abstract]
Accrued Liabilities, Fair Value Disclosure		12,684,068	14,683,266
Significant Other Observable Inputs (Level 2) [Member] | Bank Time Deposits [Member]
Liabilities, Fair Value Disclosure [Abstract]
Accrued Liabilities, Fair Value Disclosure		2,166,573	1,164,892
Significant Other Observable Inputs (Level 2) [Member] | Federal Home Loan Bank Advances [Member]
Liabilities, Fair Value Disclosure [Abstract]
Federal Home Loan Bank Borrowings, Fair Value Disclosure		1,103,845	563
Significant Other Observable Inputs (Level 2) [Member] | Junior Subordinated Debt [Member]
Liabilities, Fair Value Disclosure [Abstract]
Accrued Liabilities, Fair Value Disclosure		58,911	60,002
Significant Unobservable Inputs (Level 3) [Member] | Subordinated Debt [Member]
Liabilities, Fair Value Disclosure [Abstract]
Accrued Liabilities, Fair Value Disclosure		49,613	45,891
US Government Agencies Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value		28,408	29,036	[4]
Liabilities, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-maturity		29,521	31,258
US Government Agencies Debt Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value		28,408	29,036
US Treasury Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value	[4]	91,535	88,879
Liabilities, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-maturity		100,712	100,634
US Treasury Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value		91,535	88,879
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value	[4]	763,728	815,952
Liabilities, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-maturity		829,431	898,927
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value		763,728	815,952
Collateralized Mortgage Obligations [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value	[4]	407,911	458,417
Liabilities, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-maturity		477,517	535,971
Collateralized Mortgage Obligations [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value		407,911	458,417
Single Issuer Trust Preferred Securities Issued By Banks [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value	[4]	1,373	1,508
Liabilities, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-maturity		1,500	1,500
Single Issuer Trust Preferred Securities Issued By Banks [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value		1,373	1,508
Small Business Administration Pooled Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value	[4]	124,653	130,918
Liabilities, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-maturity		130,426	136,830
Small Business Administration Pooled Securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value		0	0
Small Business Administration Pooled Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value		124,653	130,918
Small Business Administration Pooled Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value		0	0
Loans Net Of Allowance For Loan Loses [Member]
Assets, Fair Value Disclosure [Abstract]
Loans and Leases Receivable, Net Amount		14,106,967	13,760,164
Loans, net of allowance for loan losses	[5]	13,079,368	13,260,873
Loans Net Of Allowance For Loan Loses [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets, Fair Value Disclosure [Abstract]
Loans, net of allowance for loan losses		13,079,368	13,260,873
Investment in Federal Home Loan Bank Stock [Member]
Assets, Fair Value Disclosure [Abstract]
Federal Home Loan Bank Stock		43,557	5,218
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure	[6]	43,557	5,218
Investment in Federal Home Loan Bank Stock [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets, Fair Value Disclosure [Abstract]
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure		0	0
Investment in Federal Home Loan Bank Stock [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets, Fair Value Disclosure [Abstract]
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure		43,557	5,218
Investment in Federal Home Loan Bank Stock [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets, Fair Value Disclosure [Abstract]
Investment in Federal Home Loan Bank Stock, Fair Value Disclosure		0	0
Cash Surrender Value [Member]
Assets, Fair Value Disclosure [Abstract]
Bank Owned Life Insurance		297,387	293,323
Cash Surrender Value, Fair Value Disclosure	[7]	297,387	293,323
Cash Surrender Value [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets, Fair Value Disclosure [Abstract]
Cash Surrender Value, Fair Value Disclosure		0	0
Cash Surrender Value [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets, Fair Value Disclosure [Abstract]
Cash Surrender Value, Fair Value Disclosure		297,387	293,323
Cash Surrender Value [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets, Fair Value Disclosure [Abstract]
Cash Surrender Value, Fair Value Disclosure		$ 0	$ 0
[1] Fair value of demand deposits, savings and interest checking accounts and money market deposits is the amount payable on demand at the reporting date. Fair value was determined by discounting anticipated future cash payments using rates currently available for instruments with similar remaining maturities. Fair value was determined based upon market prices of securities with similar terms and maturities. The fair values presented are based on quoted market prices, where available. If quoted market prices are not available, fair values are based on quoted market prices of comparable instruments and/or discounted cash flow analysis. Fair value of loans is measured using the exit price valuation method, determined primarily by discounting the future cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities or cash flows, while incorporating liquidity and credit assumptions. Additionally, this amount excludes individually assessed collateral dependent loans, which are deemed to be marked to fair value on a nonrecurring basis. Federal Home Loan Bank stock has no quoted market value and is carried at cost, therefore the carrying amount approximates fair value. Cash surrender value of life insurance is recorded at its cash surrender value (or the amount that can be realized upon surrender of the policy), therefore, carrying amount approximates fair value.

REVENUE RECOGNITION (Details)

REVENUE RECOGNITION (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Other noninterest income - ASC 606	$ 5,684	$ 6,099	$ 5,312
Total noninterest income in scope of ASC 606	89,263	84,415	71,809
Total noninterest income out of scope of ASC 606	35,346	30,252	34,041
Noninterest Income	124,609	114,667	105,850
Deposit Account [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	23,486	23,370	16,745
Credit Card, Merchant Discount [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	11,865	10,881	8,862
ATM Charge [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,243	3,866	2,989
Investment Advisory, Management and Administrative Service [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	34,588	32,774	31,617
Investment Advisory, Retail Investment and Insurance Service [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	5,603	4,058	3,691
Merchant Processing [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,675	1,534	1,362
Credit Card Income [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,119	$ 1,833	$ 1,231

REVENUE RECOGNITION CONTRACT WI

REVENUE RECOGNITION CONTRACT WITH CUSTOMER (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]
Investment Management Income Receivable	$ 5,509	$ 5,261

Reconciliation of changes in th

Reconciliation of changes in the components of OCI (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Equity [Abstract]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax		$ (19,705)	$ 3,633	$ 13,435
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax		(6,281)	19,873	7,490
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax		16,055	(50,767)	(19,139)
Other Comprehensive Income (Loss), before Tax [Abstract]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax		22,336	(70,640)	(26,629)
Change in fair value of securities available for sale, pre tax amount		(42,019)	155,037	29,995
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax		210	5,603	3,414
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax		(536)	635	1,331
Amortization of certain costs included in net periodic retirement costs, pre tax amount		(39)	(39)	(192)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	[1]	(312)	6,246	4,937
Total other comprehensive loss, pre tax amount		64,043	(219,431)	(51,687)
Other Comprehensive Income (Loss), Tax [Abstract]
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax		(9,593)	36,047	7,073
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax		(59)	(1,575)	(960)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax		151	(179)	(374)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, Tax		(11)	(11)	(54)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	[1]	88	(1,756)	(1,388)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent		(15,786)	54,164	13,175
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax		32,426	(118,990)	(22,922)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent		32,426	(118,990)	(22,922)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax		151	4,028	2,454
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax		(385)	456	957
Amortization of certain costs included in net periodic retirement costs, after tax amount		28	28	138
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	[1]	(224)	4,490	3,549
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		48,257	(165,267)	(38,512)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax		0	0	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax		0	0	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax		0	0	0
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, Portion Attributable to Parent		42,019	(155,037)	(29,995)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, before Tax		42,019	(155,037)	(29,995)
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax		9,593	(36,047)	(7,073)
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax		32,426	(118,990)	(22,922)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax		0	0	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax		0	0	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax		0	0	0
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, Portion Attributable to Parent		42,019	(155,037)	(29,995)
Other Comprehensive Income (Loss), Available-for-Sale Securities, Tax, Portion Attributable to Parent, Total		9,593	(36,047)	(7,073)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent		32,426	(118,990)	(22,922)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax		(5,078)	(65,586)	(7,938)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax		1,428	18,452	2,234
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax		(3,650)	(47,134)	(5,704)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax		(27,414)	5,054	18,691
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax		7,709	(1,421)	(5,256)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax		(19,705)	3,633	13,435
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax		22,336	(70,640)	(26,629)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax		6,281	(19,873)	(7,490)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax		16,055	(50,767)	(19,139)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax		210	5,603	3,414
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax		59	1,575	960
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax		151	4,028	2,454
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax		536	(635)	(1,331)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax		151	(179)	(374)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax		385	(456)	(957)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax		39	39	192
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, Tax		11	11	54
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, after Tax		28	28	138
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax		(25)	(31)
Other Comprehensive Income (Loss), Defined Benefit Plan, Adjustment for Settlement or Curtailment Gain (Loss), Tax		7	9
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), after Tax		(18)	(22)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	[1]	312	(6,246)	(4,937)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	[1]	88	(1,756)	(1,388)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	[1]	224	(4,490)	(3,549)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent		64,043	(219,431)	(51,687)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent		15,786	(54,164)	(13,175)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		$ 48,257	$ (165,267)	$ (38,512)
[1] The amortization of prior service costs is included in the computation of net periodic pension costs as disclosed in Note 12 - Employee Benefit Plans within the Notes to the Consolidated Financial Statements in Item 8.

Accumulated other comprehensive

Accumulated other comprehensive income table (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	$ (163,084)	$ 2,183	$ 40,695
Total other comprehensive income (loss)	48,257	(165,267)	(38,512)
Ending Balance	(114,827)	(163,084)	2,183
Unrealized Gain (Loss) on Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(128,657)	(9,667)	13,255
Total other comprehensive income (loss)	32,426	(118,990)	(22,922)
Ending Balance	(96,231)	(128,657)	(9,667)
Unrealized Gain (Loss) on Cash Flow Hedge
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(36,630)	14,137	33,276
Total other comprehensive income (loss)	16,055	(50,767)	(19,139)
Ending Balance	(20,575)	(36,630)	14,137
Defined Benefit Postretirement Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	2,203	(2,287)	(5,836)
Total other comprehensive income (loss)	(224)	4,490	3,549
Ending Balance	1,979	2,203	(2,287)
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Total other comprehensive income (loss)	$ 48,257	$ (165,267)	$ (38,512)

LEASES (Details)

LEASES (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months		$ 13,961
Operating Lease, Cost	[1]	14,472	$ 17,322	$ 14,550
Short-term Lease, Cost		28	72	23
Variable Lease, Cost		0	0	0
Lease, Cost		14,500	$ 17,394	$ 14,573
Lessee, Operating Lease, Liability, Payments, Due Year Two		13,050
Lessee, Operating Lease, Liability, Payments, Due Year Three		10,910
Lessee, Operating Lease, Liability, Payments, Due Year Four		8,243
Lessee, Operating Lease, Liability, Payments, Due Year Five		5,243
Lessee, Operating Lease, Liability, Payments, Due after Year Five		10,395
Lessee, Operating Lease, Liability, Payments, Due		61,802
Operating Lease, Liability, Undiscounted Excess Amount		$ 5,525
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]		Operating Lease, Payments
Operating Lease, Liability		$ 56,277
Operating Lease, Weighted Average Remaining Lease Term		5 years 7 months 9 days	5 years 5 months 15 days	5 years 8 months 19 days
Operating Lease, Weighted Average Discount Rate, Percent		2.98%	2.43%	1.97%
[1] Operating lease costs for the periods presented are inclusive of lease exit costs noted above.

LEASES Textual (Details)

LEASES Textual (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Lessee, Lease, Description [Line Items]
Operating Lease, Weighted Average Remaining Lease Term	5 years 7 months 9 days	5 years 5 months 15 days	5 years 8 months 19 days
Operating Lease, Weighted Average Discount Rate, Percent	2.98%	2.43%	1.97%
Operating Lease, Right-of-Use Asset	$ 54,100	$ 58,900
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets	Other Assets
Property Subject to or Available for Operating Lease, Number of Units	119
Operating lease, Termination costs	$ 589	$ 4,400	$ 2,300
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Renewal Term	20 years
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Renewal Term	1 year

COMMITMENTS AND CONTINGENCIES F

COMMITMENTS AND CONTINGENCIES Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Commitments to Extend Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet financial instruments	$ 4,632,105	$ 4,566,041
Standby letters of credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet financial instruments	21,427	24,941
Deferred standby letter of credit fees [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet financial instruments	155	168
Obligation to Repurchase Receivables Sold [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet financial instruments	$ 153,850	$ 167,274

REGULATORY CAPITAL REQUIREMEN_3

REGULATORY CAPITAL REQUIREMENTS (Details) $ in Thousands	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Company (consolidated) [Member]
Total capital (to risk weighted assets):
Actual	$ 2,268,863	$ 2,311,824
Actual Ratio	0.1591	0.1611
Capital Required for Capital Adequacy	$ 1,140,554	$ 1,148,328
For Capital Adequacy Purposes Ratio	0.080	0.080
Common Equity Tier One Capital	$ 2,022,873	$ 2,057,099
Common Equity tier One Capital to Risk Weighted Assets	14.19%	14.33%
Common Equity Tier One Capital Required for Capital Adequacy	$ 641,562	$ 645,935
Common Equity Tier One Capital for Capitalized Adequacy to Risk Weighted Assets	4.50%	4.50%
Tier 1 capital (to risk weighted assets):
Actual	$ 2,022,873	$ 2,057,099
Actual Ratio	0.1419	0.1433
For Capital Adequacy Purposes	$ 855,416	$ 861,246
For Capital Adequacy Purposes Ratio	0.060	0.060
Tier 1 capital (to average assets):
Actual	$ 2,022,873	$ 2,057,099
Actual Ratio	0.1096	0.1099
For Capital Adequacy Purposes	$ 737,984	$ 748,775
For Capital Adequacy Purposes Ratio	0.040	0.040
Bank [Member]
Total capital (to risk weighted assets):
Actual	$ 2,183,436	$ 2,162,752
Actual Ratio	0.1532	0.1507
Capital Required for Capital Adequacy	$ 1,140,550	$ 1,148,329
For Capital Adequacy Purposes Ratio	0.080	0.080
To Be Well Capitalized Under Prompt Corrective Action Provisions	$ 1,425,687	$ 1,435,411
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	0.100	0.100
Common Equity Tier One Capital	$ 2,048,426	$ 2,018,912
Common Equity tier One Capital to Risk Weighted Assets	14.37%	14.07%
Common Equity Tier One Capital Required for Capital Adequacy	$ 641,559	$ 645,935
Common Equity Tier One Capital for Capitalized Adequacy to Risk Weighted Assets	4.50%	4.50%
Common Equity Tier 1 Capital to be Well Capitalized	$ 926,696	$ 933,017
Common Equity Tier One Capital to be Well Capitalized to Risk Weighted Assets	6.50%	6.50%
Tier 1 capital (to risk weighted assets):
Actual	$ 2,048,426	$ 2,018,912
Actual Ratio	0.1437	0.1407
For Capital Adequacy Purposes	$ 855,412	$ 861,247
For Capital Adequacy Purposes Ratio	0.060	0.060
To Be Well Capitalized Under Prompt Corrective Action Provisions	$ 1,140,550	$ 1,148,329
To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	0.080	0.080
Tier 1 capital (to average assets):
Actual	$ 2,048,426	$ 2,018,912
Actual Ratio	0.1110	0.1078
For Capital Adequacy Purposes	$ 738,055	$ 748,828
For Capital Adequacy Purposes Ratio	0.040	0.040
To Be Well Capitalized Under Prompt Correction Action Provisions	$ 922,568	$ 936,036
To Be Well Capitalized Under Prompt Correction Action Provisions Ratio	0.050	0.050

REGULATORY CAPITAL REQUIREMEN_4

REGULATORY CAPITAL REQUIREMENTS Regulatory Capital Requirements (Details Textual) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Dividends received from subsidiaries	$ 228.9	$ 209.2
Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 61	$ 61

Parent Company Balance Sheet (D

Parent Company Balance Sheet (Details) - USD ($) $ in Thousands		Dec. 31, 2023		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Assets:
Other Assets		$ 512,712		$ 527,716
Total assets		19,347,373		19,294,174
Liabilities and stockholders’ equity
Subordinated debentures (less unamortized debt issuance costs of $20 and $115)		49,980		49,885
Other liabilities		368,196		415,089
Total liabilities		16,452,122		16,407,473
Total stockholders' equity		2,895,251		2,886,701	$ 3,018,449	$ 1,702,685
Liabilities and Equity		19,347,373		19,294,174
Parent Company [Member]
Assets:
Cash		108,788	[1]	169,977
Investments in subsidiaries	[2]	2,922,698		2,850,407
Prepaid income taxes		2,488		2,299
Deferred tax asset		429		453
Other Assets		0		2,297
Total assets		3,034,403		3,025,433
Liabilities and stockholders’ equity
Dividends payable		23,580		25,103
Junior subordinated debentures (less unamortized debt issuance costs of $30 and $33)		62,858		62,855
Subordinated debentures (less unamortized debt issuance costs of $20 and $115)		49,980		49,885
Other liabilities		2,734		889
Total liabilities		139,152		138,732
Total stockholders' equity		2,895,251		2,886,701
Liabilities and Equity		3,034,403		3,025,433
Parent Company [Member] | Junior Subordinated Debt [Member]
Liabilities and stockholders’ equity
Unamortized Debt Issuance Expense		30		33
Subordinated Debt [Member]
Liabilities and stockholders’ equity
Unamortized Debt Issuance Expense		20		115
Subordinated Debt [Member] | Parent Company [Member]
Liabilities and stockholders’ equity
Unamortized Debt Issuance Expense		$ 20		$ 115
[1] Entire balance eliminates in consolidation.

Parent Company Income Statement

Parent Company Income Statement (Details) - USD ($)		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Expenses
Interest expense		$ 189,205,000	$ 29,591,000	$ 13,717,000
Income tax benefit		75,632,000	83,941,000	35,683,000
Net Income		239,502,000	263,813,000	120,992,000
Parent Company [Member]
Income
Dividend Income, Operating	[1]	229,046,000	209,257,000	77,673,000
Total income		229,046,000	209,257,000	77,673,000
Expenses
Interest expense		6,829,000	4,626,000	4,493,000
Other Expenses		3,156,000	1,680,000	0
Total expenses		9,985,000	6,306,000	4,493,000
Income before income taxes and equity in undistributed income of subsidiaries		219,061,000	202,951,000	73,180,000
Income tax benefit		(2,785,000)	(1,731,000)	(1,241,000)
Income of parent company		221,846,000	204,682,000	74,421,000
Equity in undistributed income of subsidiaries		17,656,000	59,131,000	46,571,000
Net Income		$ 239,502,000	$ 263,813,000	$ 120,992,000
[1]Majority of balance eliminated in consolidation.

Parent Company Cash Flow Statem

Parent Company Cash Flow Statement (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023		Dec. 31, 2022	Dec. 31, 2021
Condensed Financial Statements, Captions [Line Items]
Net income		$ 239,502		$ 263,813	$ 120,992
Adjustments to reconcile net income to net cash provided by operating activities
Deferred income tax expense		2,738		(1,254)	3,090
Change in other liabilities		(20,614)		55,224	(58,503)
Net cash provided by operating activities		276,994		421,200	190,220
Cash flows used in investing activities
Net cash used in investing activities		(211,650)		(1,000,474)	(63,136)
Cash flows (used in) provided by financing activities
Net cash (used in) provided by financing activities		(193,947)		(1,308,477)	816,964
Payments for Repurchase of Common Stock		(188,910)		(139,946)	0
Repayments of Long-term Debt		0		(14,063)	(18,750)
Net payments from exercise of stock options					57
Cash received from stock option exercises		80		0
Proceeds from shares issued under direct stock purchase plan		2,662		2,359	2,023
Common dividends paid		(98,006)		(93,734)	(62,736)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect		(128,603)		(1,887,751)	944,048
Issuance Of Restricted Stock Awards, Net of Issuance Cost		1,142		1,084	1,249
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Investments in subsidiaries	[1]	2,922,698		2,850,407
Net income		239,502		263,813	120,992
Adjustments to reconcile net income to net cash provided by operating activities
Amortization		98		96	137
Deferred income tax expense		24		28	12
Change in prepaid income taxes and other assets		2,107		(623)	(229)
Change in other liabilities		52		143	(1,873)
Equity in undistributed income of subsidiaries		17,656		59,131	46,571
Net cash provided by operating activities		224,127		204,326	72,468
Cash flows used in investing activities
Net cash acquired in business combinations		0		0	119,816
Net cash used in investing activities		0		0	119,816
Cash flows (used in) provided by financing activities
Net cash (used in) provided by financing activities		(285,316)		(246,468)	(80,769)
Cash and cash equivalents at beginning of year		169,977		212,119	100,604
Cash and cash equivalents at end of period		108,788		169,977	212,119
Cash		108,788	[2]	169,977
Payments for Repurchase of Common Stock		(188,910)		(139,946)	0
Repayments of Long-term Debt		0		(14,063)	(18,750)
Net payments from exercise of stock options		80
Cash received from stock option exercises					(57)
Proceeds from shares issued under direct stock purchase plan		2,662		2,359	2,023
Common dividends paid		(98,006)		(93,734)	(62,736)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect		(61,189)		(42,142)	111,515
Issuance Of Restricted Stock Awards, Net of Issuance Cost		$ (1,142)		$ (1,084)	$ (1,249)
[1]Majority of balance eliminates in consolidation[2] Entire balance eliminates in consolidation.

TRANSACTIONS WITH RELATED PAR_3

TRANSACTIONS WITH RELATED PARTIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Related Party Transaction [Line Items]
Loans and Leases Receivable, Related Parties	$ 11,927	$ 26,721	$ 45,033	$ 26,343
Loans and Leases Receivable, Related Parties, Additions	911	40,427	57,983
Loans and Leases Receivable, Related Parties, Collections	(1,336)	(43,147)	(39,293)
Loans and Leases Receivable, Related Parties, Period Increase (Decrease)	$ (14,369)	$ (15,592)	$ 0

TRANSACTIONS WITH RELATED PAR_4

TRANSACTIONS WITH RELATED PARTIES Related Parties Textual (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Related Party Transaction [Line Items]
Nonaccrual/TDR Loans, with related parties	$ 0	$ 0
Loans and Leases Receivable, Related Parties, Additions		0
Related Party Deposit Liabilities	3,900,000	18,500,000
Loans and Leases Receivable, Related Parties, Additions	911,000	$ 40,427,000	$ 57,983,000
Related Party [Domain]
Related Party Transaction [Line Items]
Loans and Leases Receivable, Related Parties, Additions	$ 10.6