Condensed Parent Company Financial Information - Summary of Condensed Statements of Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Unrealized (loss) gain on equity securities									$ (3)	$ 28
Other income									799	699
NET INCOME	$ 3,753	$ 3,650	$ 3,209	$ 2,701	$ 2,306	$ 2,901	$ 2,745	$ 2,885	13,313	10,837
COMPREHENSIVE INCOME									2,519	7,726
Parent Company [Member]
Dividends on securities									7	3
Dividends from subsidiary									3,950	4,150
Unrealized (loss) gain on equity securities									(3)	28
Total income									3,954	4,181
Operating expenses									407	341
Income before taxes and undistributed equity income of subsidiary									3,547	3,840
Income tax benefit									(86)	(65)
Equity earnings in subsidiary, net of dividends									9,680	6,932
NET INCOME									13,313	10,837
COMPREHENSIVE INCOME									$ 2,519	$ 7,726