Allowance for Loan Losses - Schedule of Allowance for Credit losses by Portfolio Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	$ 12,877	$ 9,584
Charge-offs	(32)	(1,853)
Recoveries	27	1,536
Provision	(1,175)	3,610
Ending Balance	11,697	12,877
Collectively evaluated for Impairment	11,697	12,877
Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,223	1,030
Recoveries		2
Provision	449	191
Ending Balance	1,672	1,223
Collectively evaluated for Impairment	1,672	1,223
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	6,552	4,254
Charge-offs		(1)
Provision	(863)	2,299
Ending Balance	5,689	6,552
Collectively evaluated for Impairment	5,689	6,552
Construction Development And Land [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	3,326	2,180
Provision	(629)	1,146
Ending Balance	2,697	3,326
Collectively evaluated for Impairment	2,697	3,326
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	371	568
Charge-offs	(32)	(60)
Recoveries	16	8
Provision	(256)	(145)
Ending Balance	99	371
Collectively evaluated for Impairment	99	371
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,405	1,552
Charge-offs		(1,792)
Recoveries	11	1,526
Provision	124	119
Ending Balance	1,540	1,405
Collectively evaluated for Impairment	$ 1,540	$ 1,405