Allowance for Credit Losses - Schedule of Accrued Interest Receivables Written off by Reversing Interest (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Accrued Interest Receivables And Written Off Status [Line Items]
Accrued Interest Receivables Written Off by Reversing Interest Income	$ 674	$ 591	$ 839	$ 1,007
Construction & land development [Member]
Accrued Interest Receivables And Written Off Status [Line Items]
Accrued Interest Receivables Written Off by Reversing Interest Income	76	163	76	207
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	4	41	4	68
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	260	88	264	100
Other commercial [Member]
Accrued Interest Receivables And Written Off Status [Line Items]
Accrued Interest Receivables Written Off by Reversing Interest Income	206	44	208	77
Residential real estate [Member]
Accrued Interest Receivables And Written Off Status [Line Items]
Accrued Interest Receivables Written Off by Reversing Interest Income	102	182	222	406
Consumer [Member] \| Bankcard [Member]
Accrued Interest Receivables And Written Off Status [Line Items]
Accrued Interest Receivables Written Off by Reversing Interest Income	0	0	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	$ 26	$ 73	$ 65	$ 149