Consolidated Statements of Stockholders' Deficit - USD ($) $ in Thousands	Total	Common Stock [Member]	Capital in Excess of Par Value [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]		Accumulated Deficit [Member]
Balance at Mar. 31, 2021	$ (818,853)	$ 64	$ 978,272	$ (12,606)	$ (530,192)		$ (1,254,391)
Balance (in shares) at Mar. 31, 2021		64,185,001
Net Income (loss)	(42,758)						(42,758)
Foreign currency translation adjustment	(5,772)				(5,772)
Pension liability adjustment, net of income taxes	73,895				73,895
Change in fair value of foreign currency hedges, net of income taxes	(1,285)				(1,285)
Share-based compensation	9,934		(5,332)	15,266
Share-based compensation, shares		565,168
Repurchase of restricted shares for minimum tax obligation	(3,249)			(3,249)
Repurchase of restricted shares for minimum tax obligation, shares		(173,009)
Employee stock purchase plan	665		172	493
Employee stock purchase plan, shares		37,222
Balance at Mar. 31, 2022	(787,423)	$ 64	973,112	(96)	(463,354)	[1]	(1,297,149)
Balance (in shares) at Mar. 31, 2022		64,614,382
Net Income (loss)	89,593						89,593
Foreign currency translation adjustment	(1,273)				(1,273)
Pension liability adjustment, net of income taxes	(91,506)				(91,506)
Change in fair value of foreign currency hedges, net of income taxes	1,487				1,487
Share-based compensation	9,010	$ 1	9,009
Share-based compensation, shares		554,169
Repurchase of restricted shares for minimum tax obligation	(3,547)			(3,547)
Repurchase of restricted shares for minimum tax obligation, shares		(194,728)
Retirement of treasury shares			(3,643)	3,643
Employee stock purchase plan	660		660
Employee stock purchase plan, shares		48,623
Issuance of warrants on common shares	(19,500)		(19,500)
Warrant exercises, net of income taxes	5,103		5,103
Warrant exercises, net of income taxes, shares		410,143
Balance at Mar. 31, 2023	(797,396)	$ 65	964,741		(554,646)	[1]	(1,207,556)
Balance (in shares) at Mar. 31, 2023		65,432,589
Net Income (loss)	512,384						512,384
Foreign currency translation adjustment	5,057				5,057
Pension liability adjustment, net of income taxes	33,668				33,668
Change in fair value of foreign currency hedges, net of income taxes	(1,148)				(1,148)
Share-based compensation	9,445		9,398	47
Share-based compensation, shares		511,823
Repurchase of restricted shares for minimum tax obligation	(1,629)			(1,629)
Repurchase of restricted shares for minimum tax obligation, shares		(134,177)
Retirement of treasury shares	43		(718)	761
Employee stock purchase plan	598		598
Employee stock purchase plan, shares		55,220
Warrant exercises, net of income taxes	95,428	$ 8	95,420
Warrant exercises, net of income taxes, shares		7,858,236
Issuance of shares on pension contribution, shares		3,200,000
Issuance of shares on pension contribution	39,136	$ 4	38,311	$ 821
Balance at Mar. 31, 2024	$ (104,414)	$ 77	$ 1,107,750		$ (517,069)	[1]	$ (695,172)
Balance (in shares) at Mar. 31, 2024		76,923,691

[1] Net of tax.