v3.26.1
Fair Value Measurements - Estimated Fair Values of Financial Instruments (Detail) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Financial assets:    
Cash and due from banks $ 331,206 $ 212,841
Securities available for sale 896,610 880,624
Loans held for sale 16,969 7,403
Loans, net of allowance for credit losses 6,464,837 6,493,465
Accrued interest receivable 24,613 24,466
Derivative financial instruments 2,410 2,719
Financial liabilities:    
Noninterest-bearing deposits 2,135,418 2,015,212
Interest-bearing deposits 4,819,924 4,662,438
Borrowings and subordinated debentures 130,773 280,463
Accrued interest payable 27,530 34,783
Derivative financial instruments 2,392 2,568
Quoted Prices in Active Markets for Identical Assets | Fair Value    
Financial assets:    
Cash and due from banks 331,206 212,841
Securities available for sale 211,417 128,710
Loans held for sale 0 0
Loans, net of allowance for credit losses 0 0
Accrued interest receivable 24,613 24,466
Derivative financial instruments 0 0
Financial liabilities:    
Interest-bearing deposits 0 0
Borrowings and subordinated debentures 0 0
Accrued interest payable 27,530 34,783
Derivative financial instruments 0 0
Significant Observable Inputs with No Active Market with Identical Characteristics | Fair Value    
Financial assets:    
Cash and due from banks 0 0
Securities available for sale 685,193 751,914
Loans held for sale 17,544 7,715
Loans, net of allowance for credit losses 0 0
Accrued interest receivable 0 0
Derivative financial instruments 2,410 2,719
Financial liabilities:    
Interest-bearing deposits 0 0
Borrowings and subordinated debentures 0 149,761
Accrued interest payable 0 0
Derivative financial instruments 2,392 2,568
Significant Unobservable Inputs | Fair Value    
Financial assets:    
Cash and due from banks 0 0
Securities available for sale 0 0
Loans held for sale 0 0
Loans, net of allowance for credit losses 6,506,036 6,532,980
Accrued interest receivable 0 0
Derivative financial instruments 0 0
Financial liabilities:    
Interest-bearing deposits 4,816,852 4,664,018
Borrowings and subordinated debentures 132,249 137,296
Accrued interest payable 0 0
Derivative financial instruments $ 0 $ 0