Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

Name:	us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Debtor's Financial Statements (Balance Sheets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2012	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 54,979	$ 103,711	$ 104,289	$ 88,336
Accounts receivable, net	454,871us-gaap_AccountsReceivableNetCurrent	495,447us-gaap_AccountsReceivableNetCurrent
Inventories	488,895us-gaap_InventoryNet	483,218us-gaap_InventoryNet
Prepaid expenses and other current assets	43,044	47,874
Total current assets	1,056,530us-gaap_AssetsCurrent	1,146,589us-gaap_AssetsCurrent
Property, plant and equipment, net	544,378us-gaap_PropertyPlantAndEquipmentNet	576,412us-gaap_PropertyPlantAndEquipmentNet
Other noncurrent assets	106,847us-gaap_OtherAssetsNoncurrent	50,670us-gaap_OtherAssetsNoncurrent
Total assets	1,920,559us-gaap_Assets	2,032,788us-gaap_Assets
Current maturities of long-term debt	484,465	288,386
Total current liabilities	1,000,635us-gaap_LiabilitiesCurrent	829,611us-gaap_LiabilitiesCurrent
Other noncurrent liabilities	58,370us-gaap_OtherLiabilitiesNoncurrent	64,493us-gaap_OtherLiabilitiesNoncurrent
Liabilities not subject to compromise	1,227,824us-gaap_Liabilities	1,101,661us-gaap_Liabilities
Liabilities subject to compromise	998,317us-gaap_LiabilitiesSubjectToCompromise	950,643us-gaap_LiabilitiesSubjectToCompromise
Total Debtor's deficit	(305,582)	(19,516)
Total liabilities and Debtors' equity	1,920,559	2,032,788
Parent Company
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	4,333	17,349	26,419		11,259
Accounts receivable, net	98,120	133,384
Non-Debtor receivables	47,637	40,550
Inventories	201,588	196,129
Prepaid expenses and other current assets	27,558	37,594
Total current assets	379,236	425,006
Property, plant and equipment, net	231,003	228,297
Investments in non-Debtor subsidiaries	350,962	400,048
Non-Debtor loans	239,247	240,505
Other noncurrent assets	135,607	84,734
Total other assets	725,816	725,287
Total assets	1,336,055	1,378,590
Current maturities of long-term debt	483,783	284,625
Accounts payable and accrued expenses	113,070	110,812
Total current liabilities	596,853	395,437
Other noncurrent liabilities	55,236	60,442
Liabilities not subject to compromise	652,089	455,879
Liabilities subject to compromise	998,317	950,643
Total Debtor's deficit	(314,351)	(27,932)
Total liabilities and Debtors' equity	$ 1,336,055	$ 1,378,590