Proceedings Under Chapter 11 of The Bankruptcy Code (Liabilities Subject to Compromise) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Mar. 31, 2014
Reorganizations [Abstract]
Debt	$ 818,644	$ 788,376
Accrued interest	11,013	10,515
Accounts payable	75,023	72,275
Retirement obligations	52,861	52,864
Restructuring reserve	6,103	7,274
Other accrued liabilities	18,664	19,339
Total	$ 982,308	$ 950,643