Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Abstract]
Net income	$ 45,752	$ 56,953	$ (26,525)	$ 61,868	$ 62,213	$ 44,588	$ 76,180	$ 168,669
Weighted average shares – basic	45,508			45,201			45,419	45,105
Net income per share – basic	$ 1.01			$ 1.37			$ 1.68	$ 3.74
Effect of dilutive securities	413			505			432	548
Weighted average shares – diluted	45,921			45,706			45,851	45,653
Net income per share - diluted	$ 1.00			$ 1.35			$ 1.66	$ 3.69