Loans and Allowance For Credit Losses - Summary of Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	$ 16,028	$ 17,005
Adoption of new accounting standard		(1,840)
Provision for credit losses	301	464
Charge-offs	(439)	(247)
Recoveries	91
Ending balance	$ 15,981	$ 15,382
Allowance for credit losses / gross loans	1.05%	0.95%
Net recoveries (charge-offs) / gross loans	(0.02%)	(0.02%)
Commercial And Industrial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	$ 10,853	$ 10,620
Adoption of new accounting standard		(1,566)
Provision for credit losses	231	1,912
Charge-offs		(247)
Recoveries	91
Ending balance	$ 11,175	$ 10,719
Allowance for credit losses / gross loans	1.83%	1.63%
Net recoveries (charge-offs) / gross loans	0.01%	(0.04%)
Real Estate, Other [Member]
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	$ 3,218	$ 5,322
Adoption of new accounting standard		(1,725)
Provision for credit losses	(120)	(654)
Ending balance	$ 3,098	$ 2,943
Allowance for credit losses / gross loans	0.37%	0.34%
Net recoveries (charge-offs) / gross loans	0.00%	0.00%
Real Estate Construction And Land [Member]
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	$ 492	$ 884
Adoption of new accounting standard		1
Provision for credit losses	50	(142)
Ending balance	$ 542	$ 743
Allowance for credit losses / gross loans	1.51%	1.16%
Net recoveries (charge-offs) / gross loans	0.00%	0.00%
SBA [Member]
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	$ 521	$ 132
Adoption of new accounting standard		(91)
Provision for credit losses	(7)	1
Charge-offs	(309)
Ending balance	$ 205	$ 42
Allowance for credit losses / gross loans	5.23%	0.75%
Net recoveries (charge-offs) / gross loans	(7.88%)	0.00%
Other Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	$ 944	$ 47
Adoption of new accounting standard		1,541
Provision for credit losses	147	(653)
Charge-offs	(130)
Ending balance	$ 961	$ 935
Allowance for credit losses / gross loans	2.63%	2.48%
Net recoveries (charge-offs) / gross loans	(0.36%)	0.00%