Restatement of Previously Issued Consolidated Financial Statements - Adjustments for Error Corrections in Statement of Consolidated Stockholders' Equity (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 248,597	$ 328,142	$ 316,857	[1]
Net income (loss)	(26,302)	(101,404)	24,612
Other comprehensive losses, net of tax	(28,060)	17,091	(16,744)
Ending balance	197,268	248,597	328,142
Retained Deficit [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(182,054)	(80,993)	(104,906)	[1]
Net income (loss)	(26,130)	(101,061)	23,913
Other comprehensive losses, net of tax	0	0	0
Ending balance	(208,184)	(182,054)	(80,993)
Pensions, Net of Tax [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(36,686)	(49,693)	(35,751)	[1]
Net income (loss)	0	0	0
Other comprehensive losses, net of tax	(15,546)	13,007	(13,942)
Ending balance	(52,232)	(36,686)	(49,693)
Inventory Adjustments [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(17,744)	(6,738)	(10,601)
Net income (loss)	(13,899)	(11,006)	3,863
Other comprehensive losses, net of tax			0
Ending balance	(31,643)	(17,744)	(6,738)
Inventory Adjustments [Member] | Retained Deficit [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(17,744)	(6,738)	(10,601)
Net income (loss)	(13,899)	(11,006)	3,863
Ending balance	(31,643)	(17,744)	(6,738)
Inventory Adjustments [Member] | Pensions, Net of Tax [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	0	0
Other comprehensive losses, net of tax			0
Ending balance	0	0	0
Receivables Adjustments [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(8,772)	(8,414)	(5,420)
Net income (loss)	1,495	(358)	(2,994)
Other comprehensive losses, net of tax			0
Ending balance	(7,277)	(8,772)	(8,414)
Receivables Adjustments [Member] | Retained Deficit [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(8,772)	(8,414)	(5,420)
Net income (loss)	1,495	(358)	(2,994)
Ending balance	(7,277)	(8,772)	(8,414)
Receivables Adjustments [Member] | Pensions, Net of Tax [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	0	0
Other comprehensive losses, net of tax			0
Ending balance	0	0	0
Other Adjustments [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(1,775)	1,263	2,457
Net income (loss)	1,699	(3,038)	(969)
Other comprehensive losses, net of tax			(225)
Ending balance	(76)	(1,775)	1,263
Other Adjustments [Member] | Retained Deficit [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(1,550)	1,488	2,457
Net income (loss)	1,699	(3,038)	(969)
Ending balance	149	(1,550)	1,488
Other Adjustments [Member] | Pensions, Net of Tax [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(225)	(225)
Other comprehensive losses, net of tax			(225)
Ending balance	(225)	(225)	(225)
As Previously Reported [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	276,888	342,031	330,421
Net income (loss)	(15,597)	(87,002)	24,712
Other comprehensive losses, net of tax			(16,519)
Ending balance	236,264	276,888	342,031
As Previously Reported [Member] | Retained Deficit [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(153,988)	(67,329)	(91,342)
Net income (loss)	(15,425)	(86,659)	24,013
Ending balance	(169,413)	(153,988)	(67,329)
As Previously Reported [Member] | Pensions, Net of Tax [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(36,461)	(49,468)
Other comprehensive losses, net of tax			(13,717)
Ending balance	$ (52,007)	$ (36,461)	$ (49,468)

[1] The balance shown for retained deficit as of March 31, 2012 has been amended in this financial statement to reflect the effect of the adjustments described in Note 1A.