Earnings Per Share - Calculation of Basic Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net income	$ 8,102	$ 4,909
Less: distributed earnings allocated to participating securities	(21)	(15)
Less: undistributed earnings allocated to participating securities	(48)	(23)
Net earnings available to common shareholders	$ 8,033	$ 4,871
Weighted average common shares outstanding including participating securities	13,066,272	11,197,012
Less: average unvested restricted shares	(111,165)	(86,595)
Weighted average common shares outstanding	12,955,107	11,110,417
Basic and diluted earnings per share	$ 0.62	$ 0.44