Loans - Loan Balances (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Accounts Notes And Loans Receivable [Line Items]
Total loans	$ 13,158	$ 9,253
Allowance for credit losses	(37,160)	(28,511)
Net loans		2,049,931
Loans Receivable [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	2,861,727	2,648,281
Allowance for credit losses	(37,160)	(28,511)
Net loans	2,824,567	2,619,770
Commercial and Agriculture [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	3,698	859
Allowance for credit losses	(7,587)	(3,011)
Net loans		278,595
Commercial and Agriculture [Member] | Loans Receivable [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	304,793	278,595
Commercial Real Estate Owner Occupied [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	127	110
Allowance for credit losses	(4,723)	(4,565)
Net loans		371,147
Commercial Real Estate Owner Occupied [Member] | Loans Receivable [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	377,321	371,147
Commercial Real Estate Non Owner Occupied [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	0	1,164
Allowance for credit losses	(12,056)	(14,138)
Net loans		1,018,736
Commercial Real Estate Non Owner Occupied [Member] | Loans Receivable [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	1,161,894	1,018,736
Residential Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	7,403	5,097
Allowance for credit losses	(8,489)	(3,145)
Net loans		119,991
Residential Real Estate [Member] | Loans Receivable [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	659,841	552,781
Real Estate Construction [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans		219
Allowance for credit losses	(3,388)	(2,293)
Net loans		198,955
Real Estate Construction [Member] | Loans Receivable [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	260,409	243,127
Farm Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans		7
Allowance for credit losses	(260)	(291)
Net loans		24,708
Farm Real Estate [Member] | Loans Receivable [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	24,771	24,708
Lease Financing Receivable [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	1,733	1,381
Allowance for credit losses	(297)	(429)
Net loans		36,797
Lease Financing Receivable [Member] | Loans Receivable [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	54,642	36,797
Consumer and Other [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	197	416
Allowance for credit losses	(341)	(98)
Net loans		1,002
Consumer and Other [Member] | Loans Receivable [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	$ 18,056	20,775
Loan Participations Sold, Reflected as Secured Borrowings [Member] | Loans Receivable [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans		$ 101,615