Reconciliation of Earnings per Share and Shares in Computation of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings Per Share [Abstract]
Net income	$ 176,568	$ 128,959	$ 110,472
Earnings per share:
Basic	$ 2.86	$ 2.05	$ 1.74
Effect of CESs	(0.04)	(0.02)	(0.02)
Diluted	$ 2.82	$ 2.03	$ 1.72
Weighted average number of shares:
Basic	61,817	62,768	63,445
Effect of CESs	791	640	878
Diluted	62,608	63,408	64,323