Loans - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2021 USD ($) Loan	Dec. 31, 2020 USD ($) Loan	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 27, 2020 USD ($)
Accounts Notes And Loans Receivable [Line Items]
Total loans			$ 2,861,727,000	$ 2,546,666,000
Total loans			13,158,000	9,253,000
Net deferred loan fees			2,743,000	1,652,000
Loans processed			0
Loans and Leases Receivable, Net Amount			2,824,568,000	2,619,770,000
Paycheck Protection Program Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans			326,000
Number of loans processed | Loan	1,340	2,300
Loans processed	$ 131,109,000	$ 268,300,000			$ 284,500,000,000
Loans and Leases Receivable, Net Amount			7,231,000	8,017,000
Commercial and Agriculture [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans			304,793,000	278,595,000
Total loans			3,698,000	859,000
Commercial and Agriculture [Member] | Paycheck Protection Program Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans			$ 326,000	$ 566,000