Earnings per Common Share - Computation of Basic and Diluted Earnings per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Basic
Net income	$ 12,888	$ 8,466
Less allocation of earnings and dividends to participating securities	452	32
Net income available to common shareholders—basic	$ 12,436	$ 8,434
Weighted average common shares outstanding	15,732,092	14,909,192
Less average participating securities	552,882	55,905
Weighted average number of shares outstanding used in the calculation of basic earnings per common share	15,179,210	14,853,287
Earnings per common share:
Basic	$ 0.82	$ 0.57
Diluted	$ 0.82	$ 0.57