Earnings per Common Share - Computation of Basic and Diluted Earnings per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Basic
Net income	$ 31,683	$ 42,964	$ 39,427
Less allocation of earnings and dividends to participating securities	671	1,583	498
Net income available to common shareholders-basic	$ 31,012	$ 41,381	$ 38,929
Weighted average common shares outstanding	15,724,768	15,734,624	15,162,032
Less average participating securities	333,029	579,857	191,402
Weighted average common shares outstanding for earnings per common share basic	15,391,739	15,154,767	14,970,630
Basic earnings per share	$ 2.01	$ 2.73	$ 2.6
Diluted
Net income available to common shareholders-diluted	$ 31,012	$ 41,381	$ 38,929
Weighted average number of shares outstanding used in the calculation of basic earnings per common share	15,391,739	15,154,767	14,970,630
Average shares and dilutive potential common shares outstanding—diluted	15,391,739	15,154,767	14,970,630
Diluted earnings per share	$ 2.01	$ 2.73	$ 2.6