Earnings Per Share - Calculation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share Basic [Abstract]
Net income	$ 6,132	$ 23,767	$ 23,463	$ 43,079
Basic weighted average common shares	19,273,934	19,327,422	19,302,805	19,319,608
Basic earnings per common share	$ 0.32	$ 1.23	$ 1.22	$ 2.23
Net income	$ 6,132	$ 23,767	$ 23,463	$ 43,079
Weighted average common shares	19,273,934	19,327,422	19,302,805	19,319,608
Restricted stock	58,234	53,189	64,280	64,470
Diluted weighted average common shares	19,332,168	19,380,611	19,367,085	19,384,078
Diluted earnings per common share	$ 0.32	$ 1.23	$ 1.21	$ 2.22