Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Estimated Fair Values of Financial Instruments (Detail)

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Fair Value Measurements - Estimated Fair Values of Financial Instruments (Detail) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Financial assets:    
Cash and due from banks $ 256,038 $ 302,324
Securities available for sale 872,190 865,739
Loans held for sale 3,999 12,013
Loans receivable, net of allowance for credit losses 6,109,570 6,112,972
Accrued interest receivable 23,032 23,371
Financial liabilities:    
Noninterest-bearing deposits 1,933,060 2,003,596
Interest-bearing deposits 4,443,000 4,276,978
Borrowings and subordinated debentures 302,665 455,012
Accrued interest payable 38,007 39,306
Quoted Prices in Active Markets for Identical Assets | Fair Value    
Financial assets:    
Cash and due from banks 256,038 302,324
Securities available for sale 87,304 85,488
Loans held for sale 0 0
Loans receivable, net of allowance for credit losses 0
Accrued interest receivable 23,032 23,371
Financial liabilities:    
Noninterest-bearing deposits 0
Interest-bearing deposits 0
Borrowings and subordinated debentures 0
Accrued interest payable 38,007 39,306
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 784,886 780,251
Loans held for sale 4,109 12,238
Loans receivable, net of allowance for credit losses 0 0
Accrued interest receivable 0 0
Financial liabilities:    
Noninterest-bearing deposits 1,933,060 2,003,596
Interest-bearing deposits 0 0
Borrowings and subordinated debentures 171,201 323,491
Accrued interest payable 0 0
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 receivable, net of allowance for credit losses 6,011,407 6,007,975
Accrued interest receivable 0 0
Financial liabilities:    
Noninterest-bearing deposits 0 0
Interest-bearing deposits 4,437,547 4,271,711
Borrowings and subordinated debentures 131,361 128,229
Accrued interest payable $ 0 $ 0