Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock Voting	Additional Paid In Capital	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Retained Earnings
Beginning balance, common stock (in shares) at Mar. 31, 2022		126,425,383
Beginning balance at Mar. 31, 2022	$ 2,060,395	$ 126	$ 3,023,403	$ 141	$ (1,373,840)	$ 410,565
Beginning balance, treasury stock (in shares) at Mar. 31, 2022					52,323,090
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(7,132)					(7,132)
Unrealized net investment losses	(11)			(11)
Unrealized net gain (loss) on derivative financial instruments	(26)			(26)
Cumulative translation adjustments	(251)			(251)
Issuance of common stock pursuant to vesting of restricted stock units (in shares)		946,430
Issuance of common stock pursuant to vesting of restricted stock units	1	$ 1
Stock-based compensation expense for restricted stock units granted to employees	14,760		14,760
Repurchase of treasury stock (in shares)					3,564,902
Repurchase of treasury stock	(160,847)		(45,000)		$ (115,847)
Ending balance, common stock (in shares) at Jun. 30, 2022		127,371,813
Ending balance at Jun. 30, 2022	1,906,889	$ 127	2,993,163	(147)	$ (1,489,687)	403,433
Ending balance, treasury stock (in shares) at Jun. 30, 2022					55,887,992
Beginning balance, common stock (in shares) at Mar. 31, 2022		126,425,383
Beginning balance at Mar. 31, 2022	$ 2,060,395	$ 126	3,023,403	141	$ (1,373,840)	410,565
Beginning balance, treasury stock (in shares) at Mar. 31, 2022					52,323,090
Ending balance, common stock (in shares) at Mar. 31, 2023	71,249,045	128,683,824
Ending balance at Mar. 31, 2023	$ 2,029,649	$ 128	3,099,698	5,738	$ (1,546,128)	470,213
Ending balance, treasury stock (in shares) at Mar. 31, 2023	57,434,779				57,434,779
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ (4,200)					(4,200)
Unrealized net investment losses	(106)			(106)
Unrealized net gain (loss) on derivative financial instruments	103			103
Cumulative translation adjustments	68			68
Issuance of common stock pursuant to vesting of restricted stock units (in shares)		1,332,217
Issuance of common stock pursuant to vesting of restricted stock units	2	$ 2
Stock-based compensation expense for restricted stock units granted to employees	19,100		19,100
Repurchase of treasury stock (in shares)					435,172
Repurchase of treasury stock	$ (13,406)				$ (13,406)
Ending balance, common stock (in shares) at Jun. 30, 2023	72,146,090	130,016,041
Ending balance at Jun. 30, 2023	$ 2,031,210	$ 130	$ 3,118,798	$ 5,803	$ (1,559,534)	$ 466,013
Ending balance, treasury stock (in shares) at Jun. 30, 2023	57,869,951				57,869,951