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, 2020		27,999,000
Beginning balance at Mar. 31, 2020	$ 1,140,120	$ 280	$ 191,451	$ 973,948	$ (25,559)
Increase (Decrease) in Stockholders' Equity
Stock-based compensation (in shares)		1,000
Stock-based compensation	3,618		3,618
Shares issued upon vesting (in shares)		1,000
Exercise of stock options (in shares)		4,000
Exercise of stock options	247	$ 0	247
Shares withheld for taxes	(90)		(90)
Net income (loss)	(7,973)			(7,973)
Total other comprehensive income	1,006				1,006
Ending balance (in shares) at Jun. 30, 2020		28,005,000
Ending balance at Jun. 30, 2020	1,136,928	$ 280	195,226	965,975	(24,553)
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)	(249,331)	(249,000)
Repurchases of common stock	$ (82,166)	$ (2)		(82,164)
Net income (loss)	48,124			48,124
Total other comprehensive 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)