Fair Value of Assets and Liabilities - Schedule of Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	$ 440,850	$ 420,715
FHLB stock	9,224	5,865
Bank-owned life insurance	206,087	204,704
Deposits	20,797,102	21,319,340
FHLB advances	20,128	17,589
Interest rate swap collateral funds	34,781	48,590
Government-sponsored residential mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	227,145	231,709
Government-sponsored commercial mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	188,043	189,006
State and municipal bonds and obligations
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	7,662
Corporate note
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	18,000
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Loans, net of allowance for loan losses	0	0
FHLB stock	0	0
Bank-owned life insurance	0	0
Deposits	0	0
FHLB advances	0	0
Interest rate swap collateral funds	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Government-sponsored residential mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Government-sponsored commercial mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| State and municipal bonds and obligations
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Corporate note
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	0
Significant Other Observable Inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Loans, net of allowance for loan losses	0	0
FHLB stock	9,224	5,865
Bank-owned life insurance	206,087	204,704
Deposits	20,792,666	21,315,556
FHLB advances	18,032	15,310
Interest rate swap collateral funds	34,781	48,590
Significant Other Observable Inputs (Level 2) \| Government-sponsored residential mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	203,492	202,271
Significant Other Observable Inputs (Level 2) \| Government-sponsored commercial mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	171,845	169,453
Significant Other Observable Inputs (Level 2) \| State and municipal bonds and obligations
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	7,520
Significant Other Observable Inputs (Level 2) \| Corporate note
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	18,225
Significant Unobservable Inputs (Level 3)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Loans, net of allowance for loan losses	17,351,605	17,126,716
FHLB stock	0	0
Bank-owned life insurance	0	0
Deposits	0	0
FHLB advances	0	0
Interest rate swap collateral funds	0	0
Significant Unobservable Inputs (Level 3) \| Government-sponsored residential mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	0	0
Significant Unobservable Inputs (Level 3) \| Government-sponsored commercial mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	0	0
Significant Unobservable Inputs (Level 3) \| State and municipal bonds and obligations
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	0
Significant Unobservable Inputs (Level 3) \| Corporate note
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	0
Carrying Value
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Loans, net of allowance for loan losses	17,691,385	17,549,402
FHLB stock	9,224	5,865
Bank-owned life insurance	206,087	204,704
Deposits	20,797,102	21,319,340
FHLB advances	20,128	17,589
Interest rate swap collateral funds	34,781	48,590
Carrying Value \| Government-sponsored residential mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	227,145	231,709
Carrying Value \| Government-sponsored commercial mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	188,043	189,006
Carrying Value \| State and municipal bonds and obligations
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	7,662
Carrying Value \| Corporate note
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	18,000
Estimate of Fair Value Measurement
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Loans, net of allowance for loan losses	17,351,605	17,126,716
FHLB stock	9,224	5,865
Bank-owned life insurance	206,087	204,704
Deposits	20,792,666	21,315,556
FHLB advances	18,032	15,310
Interest rate swap collateral funds	34,781	48,590
Estimate of Fair Value Measurement \| Government-sponsored residential mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	203,492	202,271
Estimate of Fair Value Measurement \| Government-sponsored commercial mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	171,845	$ 169,453
Estimate of Fair Value Measurement \| State and municipal bonds and obligations
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	7,520
Estimate of Fair Value Measurement \| Corporate note
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Held to maturity securities:	$ 18,225

Fair value assets and liabilities measured on recurring basis [Line Items].

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Interest Rate Swap Collateral Funds

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- Definition

The carrying amount of a life insurance policy on an officer, executive or employee for which the reporting entity (a bank) is entitled to proceeds from the policy upon death of the insured or surrender of the insurance policy.

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- Definition

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

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- Definition

The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

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- Definition

Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer.

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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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Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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