Earnings Per Share - Calculation of Basic Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share [Abstract]
Net income	$ 8,954	$ 8,271	$ 8,102	$ 5,920	$ 4,983	$ 4,909	$ 25,327	$ 15,812
Less: distributed earnings allocated to participating securities	(26)			(20)			(67)	(49)
Less: undistributed earnings allocated to participating securities	(42)			(31)			(148)	(77)
Net earnings available to common shareholders	$ 8,886			$ 5,869			$ 25,112	$ 15,686
Weighted average common shares outstanding including participating securities	13,083,145			11,209,732			13,071,859	11,199,309
Less: average unvested restricted shares	(99,838)			(96,197)			(111,209)	(89,075)
Weighted average common shares outstanding	12,983,307			11,113,535			12,960,650	11,110,234
Basic earnings per share	$ 0.68			$ 0.53			$ 1.94	$ 1.41
Diluted earnings per share	$ 0.68			$ 0.53			$ 1.94	$ 1.41