Allowance for Credit Losses - Schedule of Accrued Interest Receivables Written off by Reversing Interest (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Accrued Interest Receivables And Written Off Status [Line Items]
Accrued Interest Receivables Written Off by Reversing Interest Income	$ 159	$ 88
Construction [Member]
Accrued Interest Receivables And Written Off Status [Line Items]
Accrued Interest Receivables Written Off by Reversing Interest Income	2	0
Commercial Real Estate [Member] | Owner-Occupied [Member]
Accrued Interest Receivables And Written Off Status [Line Items]
Accrued Interest Receivables Written Off by Reversing Interest Income	0	0
Commercial Real Estate [Member] | Nonowner-Occupied [Member]
Accrued Interest Receivables And Written Off Status [Line Items]
Accrued Interest Receivables Written Off by Reversing Interest Income	0	0
Other Commercial [Member]
Accrued Interest Receivables And Written Off Status [Line Items]
Accrued Interest Receivables Written Off by Reversing Interest Income	13	1
Residential Real Estate [Member]
Accrued Interest Receivables And Written Off Status [Line Items]
Accrued Interest Receivables Written Off by Reversing Interest Income	50	20
Consumer [Member] | Bankcard [Member]
Accrued Interest Receivables And Written Off Status [Line Items]
Accrued Interest Receivables Written Off by Reversing Interest Income	0	0
Consumer [Member] | Other Consumer [Member]
Accrued Interest Receivables And Written Off Status [Line Items]
Accrued Interest Receivables Written Off by Reversing Interest Income	$ 94	$ 67