Basic and Diluted Net Income Per Share - Reconciliation of Earnings per Share and Shares in Computation of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net income	$ 49,421	$ 29,674	$ 127,832	$ 91,091
Earnings per share:
Basic	$ 0.8	$ 0.47	$ 2.07	$ 1.45
Effect of CESs	(0.01)		(0.02)	(0.02)
Diluted	$ 0.79	$ 0.47	$ 2.05	$ 1.43
Weighted average number of shares:
Basic	61,639	62,592	61,902	62,917
Effect of CESs	671	573	599	566
Diluted	62,310	63,165	62,501	63,483