Loans - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2021 USD ($) Loan	Dec. 31, 2020 USD ($) Loan	Dec. 31, 2023 USD ($)	Dec. 27, 2020 USD ($)
Accounts Notes And Loans Receivable [Line Items]
Total loans	$ 3,081,230			$ 2,861,727
Net deferred loan fees	2,686			2,743
Financing Receivable, after Allowance for Credit Loss	$ 3,041,561			2,824,568
Minimum [Member]
Accounts Notes And Loans Receivable [Line Items]
Lease financing receivables sales-type and direct financing leases for equipment, term	2 years
Maximum [Member]
Accounts Notes And Loans Receivable [Line Items]
Lease financing receivables sales-type and direct financing leases for equipment, term	6 years
Paycheck Protection Program Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	$ 177
Number of loans processed | Loan		1,340	2,300
Loans processed		$ 131,109	$ 268,300		$ 284,500,000
Financing Receivable, after Allowance for Credit Loss	7,520			7,231
Commercial and Agriculture [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	328,488			304,793
Commercial and Agriculture [Member] | Paycheck Protection Program Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	$ 177			$ 326