Earnings Per Share - Calculation of Basic Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net income	$ 6,466	$ 8,102
Less: distributed earnings allocated to participating securities	(32)	(21)
Less: undistributed earnings allocated to participating securities	(33)	(48)
Net earnings available to common shareholders	$ 6,401	$ 8,033
Weighted average common shares outstanding including participating securities	13,615,655	13,066,272
Less: average unvested restricted shares	(136,185)	(111,165)
Weighted average common shares outstanding	13,479,470	12,955,107
Basic earnings per share	$ 0.47	$ 0.62
Diluted earnings per share	$ 0.47	$ 0.62