Earnings Per Common Share - Computation of Basic and Diluted Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share [Abstract]
Net earnings	$ 13,302	$ 14,011	$ 62,731	$ 44,828
Less earnings attributable to RSUs outstanding	(458)	(361)	(1,465)	(1,082)
Net earnings attributable to common stockholders used in basic and diluted earnings per share calculation	$ 12,844	$ 13,650	$ 61,266	$ 43,746
Basic	46,734	44,955	46,729	44,425
Incremental shares from stock-based compensation	45	70	38	20
Diluted	46,779	45,025	46,767	44,445
Basic earnings per common share	$ 0.27	$ 0.30	$ 1.31	$ 0.98
Diluted earnings per common share	$ 0.27	$ 0.30	$ 1.31	$ 0.98