Earnings Per Share - Calculation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings Per Share, Basic [Abstract]
Net income – basic	$ 62,108	$ 55,602	$ 65,756
Basic weighted average common shares	19,149,080	19,233,241	19,332,391
Basic earnings per share	$ 3.24	$ 2.89	$ 3.40
Net income – diluted	$ 62,108	$ 55,602	$ 65,756
Weighted average common shares	19,149,080	19,233,241	19,332,391
Restricted stock and RSUs	77,000	89,000	77,000
Diluted weighted average common shares	19,226,021	19,321,717	19,408,619
Diluted earnings per common share	$ 3.23	$ 2.88	$ 3.39