Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets
Cash and due from banks	$ 271,088	$ 526,515
Interest–earning time deposits	1,715	2,205
Investment securities, held to maturity	1,925,883	1,945,795
Loans held for sale	922	1,418
Loans, net	4,567,788	4,367,601
Stock in FHLB	53,826	34,509
Interest receivable	40,008	38,710
Liabilities
Non–interest bearing deposits	1,093,076	1,116,005
Interest bearing deposits	4,486,794	4,548,888
Borrowings	1,359,121	1,353,050
Interest payable	7,853	22,249
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Cash and due from banks	271,088	526,515
Interest–earning time deposits	0	0
Investment securities, held to maturity	0	0
Loans held for sale	0	0
Loans, net	0	0
Stock in FHLB	0	0
Interest receivable	0	0
Liabilities
Non–interest bearing deposits	1,093,076	1,116,005
Interest bearing deposits	3,350,673	3,369,149
Borrowings	0	0
Subordinated notes	0	0
Junior subordinated debentures issued to capital trusts	0	0
Interest payable	0	0
Significant Other Observable Inputs (Level 2)
Assets
Cash and due from banks	0	0
Interest–earning time deposits	1,704	2,190
Investment securities, held to maturity	1,627,853	1,668,601
Loans held for sale	0	0
Loans, net	0	0
Stock in FHLB	53,826	34,509
Interest receivable	40,008	38,710
Liabilities
Non–interest bearing deposits	0	0
Interest bearing deposits	1,129,271	1,171,452
Borrowings	1,347,385	1,347,129
Subordinated notes	53,374	53,283
Junior subordinated debentures issued to capital trusts	50,018	50,063
Interest payable	7,853	22,249
Significant Unobservable Inputs (Level 3)
Assets
Cash and due from banks	0	0
Interest–earning time deposits	0	0
Investment securities, held to maturity	0	0
Loans held for sale	922	1,418
Loans, net	4,296,425	4,072,568
Stock in FHLB	0	0
Interest receivable	0	0
Liabilities
Non–interest bearing deposits	0	0
Interest bearing deposits	0	0
Borrowings	0	0
Subordinated notes	0	0
Junior subordinated debentures issued to capital trusts	0	0
Interest payable	0	0
Carrying Amount
Assets
Cash and due from banks	271,088	526,515
Interest–earning time deposits	1,715	2,205
Investment securities, held to maturity	1,925,725	1,945,638
Loans held for sale	922	1,418
Loans, net	4,567,788	4,367,601
Stock in FHLB	53,826	34,509
Interest receivable	40,008	38,710
Liabilities
Non–interest bearing deposits	1,093,076	1,116,005
Interest bearing deposits	4,486,794	4,548,888
Borrowings	1,359,121	1,353,050
Subordinated notes	55,634	55,543
Junior subordinated debentures issued to capital trusts	57,315	57,258
Interest payable	$ 7,853	$ 22,249

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For banks and other depository institutions: Includes cash on hand (currency and coin), cash items in process of collection, noninterest bearing deposits due from other financial institutions (including corporate credit unions), and noninterest bearing balances with the Federal Reserve Banks, Federal Home Loan Banks and central banks.

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Amount excluding accrued interest, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

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For banks and other depository institutions (including Federal Reserve Banks, if applicable): Interest-bearing deposits in other financial institutions for relatively short periods of time including, for example, certificates of deposits, which are presented separately from cash on the balance sheet.

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Amount, after valuation allowance, of financing receivable held for sale and not part of disposal group. Excludes loan covered under loss sharing agreement and loan classified as investment in debt security.

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