Allowance for Credit Losses - Schedule of allowance for credit losses on off-balance sheet credit exposures (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Recorded Investment [Line Items]
Total allowance for credit losses	$ 34,196	$ 28,511
Off-Balance Sheet Credit Exposures [Member]
Financing Receivable, Recorded Investment [Line Items]
Total allowance for credit losses	3,587
Commercial and Agriculture [Member]
Financing Receivable, Recorded Investment [Line Items]
Total allowance for credit losses	3,316	3,011
Commercial and Agriculture [Member] | Off-Balance Sheet Credit Exposures [Member]
Financing Receivable, Recorded Investment [Line Items]
Total allowance for credit losses	648
Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total allowance for credit losses	5,733	4,565
Commercial Real Estate Owner Occupied [Member] | Off-Balance Sheet Credit Exposures [Member]
Financing Receivable, Recorded Investment [Line Items]
Total allowance for credit losses	91
Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total allowance for credit losses	11,760	14,138
Commercial Real Estate Non Owner Occupied [Member] | Off-Balance Sheet Credit Exposures [Member]
Financing Receivable, Recorded Investment [Line Items]
Total allowance for credit losses	159
Residential Real Estate [Member] | Off-Balance Sheet Credit Exposures [Member]
Financing Receivable, Recorded Investment [Line Items]
Total allowance for credit losses	486
Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total allowance for credit losses	3,920	2,293
Real Estate Construction [Member] | Off-Balance Sheet Credit Exposures [Member]
Financing Receivable, Recorded Investment [Line Items]
Total allowance for credit losses	2,143
Farm Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total allowance for credit losses	269	291
Farm Real Estate [Member] | Off-Balance Sheet Credit Exposures [Member]
Financing Receivable, Recorded Investment [Line Items]
Total allowance for credit losses	26
Lease Financing Receivables [Member]
Financing Receivable, Recorded Investment [Line Items]
Total allowance for credit losses	2,907	429
Lease Financing Receivables [Member] | Off-Balance Sheet Credit Exposures [Member]
Financing Receivable, Recorded Investment [Line Items]
Total allowance for credit losses	0
Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total allowance for credit losses	354	$ 98
Consumer and Other [Member] | Off-Balance Sheet Credit Exposures [Member]
Financing Receivable, Recorded Investment [Line Items]
Total allowance for credit losses	$ 34