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Allowance for Credit Losses - Schedule of Impact Of CECL Adoption (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	$ 28,511
Charge-offs	175
Recoveries	47
Provision	620
Ending Balance	34,196
Beginning balance	28,511	$ 26,641
Charge-offs		(30)
Recoveries		122
Provision	620	300
Ending Balance	34,196	27,033
ASU 2016-13 [Member] | CECL Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	4,296
ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	897
Commercial and Agriculture [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	3,011
Charge-offs	140
Recoveries	6
Provision	10
Ending Balance	3,316
Beginning balance	3,011	2,600
Recoveries		1
Provision		(17)
Ending Balance	3,316	2,584
Commercial and Agriculture [Member] | ASU 2016-13 [Member] | CECL Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	429
Commercial Real Estate Owner Occupied [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	4,565
Provision	74
Ending Balance	5,733
Beginning balance	4,565	4,464
Provision		130
Ending Balance	5,733	4,594
Commercial Real Estate Owner Occupied [Member] | ASU 2016-13 [Member] | CECL Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	1,075
Commercial Real Estate Owner Occupied [Member] | ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	19
Commercial Real Estate Non Owner Occupied [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	14,138
Recoveries	7
Provision	462
Ending Balance	11,760
Beginning balance	14,138	13,860
Recoveries		48
Provision		669
Ending Balance	11,760	14,577
Commercial Real Estate Non Owner Occupied [Member] | ASU 2016-13 [Member] | CECL Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	(2,847)
Residential Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	3,145
Charge-offs	10
Recoveries	22
Provision	(151)
Ending Balance	5,934
Beginning balance	3,145	2,597
Charge-offs		(1)
Recoveries		61
Provision		(45)
Ending Balance	5,934	2,612
Residential Real Estate [Member] | ASU 2016-13 [Member] | CECL Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	2,762
Residential Real Estate [Member] | ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	166
Real Estate Construction [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	2,293
Recoveries	4
Provision	121
Ending Balance	3,920
Beginning balance	2,293	1,810
Provision		53
Ending Balance	3,920	1,863
Real Estate Construction [Member] | ASU 2016-13 [Member] | CECL Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	1,502
Farm Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	291
Provision	6
Ending Balance	269
Beginning balance	291	287
Recoveries		2
Provision		(40)
Ending Balance	269	249
Farm Real Estate [Member] | ASU 2016-13 [Member] | CECL Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	(28)
Lease Financing Receivables [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	429
Provision	100
Ending Balance	2,907
Beginning balance	429
Ending Balance	2,907
Lease Financing Receivables [Member] | ASU 2016-13 [Member] | CECL Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	1,743
Lease Financing Receivables [Member] | ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	635
Consumer and Other [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	98
Charge-offs	25
Recoveries	8
Provision	(5)
Ending Balance	354
Beginning balance	98	176
Charge-offs		(29)
Recoveries		10
Provision		(21)
Ending Balance	354	136
Consumer and Other [Member] | ASU 2016-13 [Member] | CECL Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	201
Consumer and Other [Member] | ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	77
Unallocated [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	541
Provision	3
Ending Balance	3
Beginning balance	541	847
Provision		(429)
Ending Balance	3	$ 418
Unallocated [Member] | ASU 2016-13 [Member] | CECL Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Beginning Balance	$ (541)

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