v3.26.1
Fair Value of Assets and Liabilities - Schedule of Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Held to maturity securities: $ 764,194 $ 599,557
FHLB stock 21,250 13,838
Bank-owned life insurance 311,387 307,836
Deposits 25,919,312 25,470,751
FHLB advances 364,412 199,617
Interest rate swap collateral funds 34,181 15,321
Government-sponsored residential mortgage-backed securities    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Held to maturity securities: 199,766 210,142
Government-sponsored commercial mortgage-backed securities    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Held to maturity securities: 181,682 185,185
State and municipal bonds and obligations    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Held to maturity securities: 329,860 167,346
Corporate bonds    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Held to maturity securities: 52,886 36,884
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 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate bonds    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Held to maturity securities: 0 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 21,250 13,838
Bank-owned life insurance 311,387 307,836
Deposits 25,916,198 25,469,630
FHLB advances 361,145 196,450
Interest rate swap collateral funds 34,181 15,321
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: 182,400 194,547
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: 169,059 173,584
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: 335,230 169,861
Significant Other Observable Inputs (Level 2) | Corporate bonds    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Held to maturity securities: 54,302 37,982
Significant Unobservable Inputs (Level 3)    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Loans, net of allowance for loan losses 22,668,384 22,365,428
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 0
Significant Unobservable Inputs (Level 3) | Corporate bonds    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Held to maturity securities: 0 0
Carrying Value    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Loans, net of allowance for loan losses 22,956,047 22,753,224
FHLB stock 21,250 13,838
Bank-owned life insurance 311,387 307,836
Deposits 25,919,312 25,470,751
FHLB advances 364,412 199,617
Interest rate swap collateral funds 34,181 15,321
Carrying Value | Government-sponsored residential mortgage-backed securities    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Held to maturity securities: 199,766 210,142
Carrying Value | Government-sponsored commercial mortgage-backed securities    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Held to maturity securities: 181,682 185,185
Carrying Value | State and municipal bonds and obligations    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Held to maturity securities: 329,860 167,346
Carrying Value | Corporate bonds    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Held to maturity securities: 52,886 36,884
Estimate of Fair Value Measurement    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Loans, net of allowance for loan losses 22,668,384 22,365,428
FHLB stock 21,250 13,838
Bank-owned life insurance 311,387 307,836
Deposits 25,916,198 25,469,630
FHLB advances 361,145 196,450
Interest rate swap collateral funds 34,181 15,321
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: 182,400 194,547
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: 169,059 173,584
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: 335,230 169,861
Estimate of Fair Value Measurement | Corporate bonds    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Held to maturity securities: $ 54,302 $ 37,982