Loans Receivable - Schedule of Allowance for Credit losses by Portfolio Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	$ 11,697	$ 12,877
Recoveries	3	18
Provision	800	320
Ending Balance	12,500	13,215
Collectively evaluated for Impairment	12,500	13,215
Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,672	1,223
Provision	307	(23)
Ending Balance	1,979	1,200
Collectively evaluated for Impairment	1,979	1,200
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	5,689	6,552
Provision	589	343
Ending Balance	6,278	6,895
Collectively evaluated for Impairment	6,278	6,895
Construction Development And Land [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	2,697	3,326
Provision	60	166
Ending Balance	2,757	3,492
Collectively evaluated for Impairment	2,757	3,492
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	99	371
Recoveries	3	13
Provision	(6)	(238)
Ending Balance	96	146
Collectively evaluated for Impairment	96	146
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,540	1,405
Recoveries		5
Provision	(150)	72
Ending Balance	1,390	1,482
Collectively evaluated for Impairment	$ 1,390	$ 1,482