CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Mar. 31, 2021		27,910,000
Beginning balance at Mar. 31, 2021	$ 1,444,225	$ 279	$ 203,310	$ 1,257,379	$ (16,743)
Increase (Decrease) in Stockholders' Equity
Stock-based compensation (in shares)		1,000
Stock-based compensation	5,469		5,469
Exercise of stock options (in shares)		1,000
Exercise of stock options	69		69
Shares withheld for taxes	(85)		(85)
Repurchases of common stock (in shares)		(249,000)
Repurchases of common stock (Note 8)	(82,166)	$ (2)		(82,164)
Net income	48,124			48,124
Total other comprehensive (loss) income	3,351				3,351
Ending balance (in shares) at Jun. 30, 2021		27,663,000
Ending balance at Jun. 30, 2021	1,418,987	$ 277	208,763	1,223,339	(13,392)
Beginning balance (in shares) at Mar. 31, 2022		26,982,000
Beginning balance at Mar. 31, 2022	1,538,825	$ 270	210,825	1,352,685	(24,955)
Increase (Decrease) in Stockholders' Equity
Stock-based compensation (in shares)		1,000
Stock-based compensation	3,735		3,735
Shares withheld for taxes	$ (43)		(43)
Repurchases of common stock (in shares)	(384,413)	(384,000)
Repurchases of common stock (Note 8)	$ (99,993)	$ (4)		(99,989)
Net income	44,849			44,849
Total other comprehensive (loss) income	(14,966)				(14,966)
Ending balance (in shares) at Jun. 30, 2022		26,599,000
Ending balance at Jun. 30, 2022	$ 1,472,407	$ 266	$ 214,517	$ 1,297,545	$ (39,921)