Earnings Per Share - Calculation of Basic Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Net income	$ 6,001	$ 6,466	$ 8,271	$ 8,102	$ 12,467	$ 16,373
Less: distributed earnings allocated to participating securities	(31)		(21)		(62)	(42)
Less: undistributed earnings allocated to participating securities	(35)		(48)		(69)	(96)
Net earnings available to common shareholders	$ 5,935		$ 8,202		$ 12,336	$ 16,235
Weighted average common shares outstanding including participating securities	13,632,440		13,065,975		13,624,094	13,066,123
Less: average unvested restricted shares	(150,065)		(108,849)		(143,163)	(110,004)
Weighted average common shares outstanding	13,482,375		12,957,126		13,480,931	12,956,119
Basic earnings per share	$ 0.44		$ 0.63		$ 0.92	$ 1.25
Diluted earnings per share	$ 0.44		$ 0.63		$ 0.92	$ 1.25