Debt (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Sep. 30, 2014	Mar. 31, 2014
Total long-term debt
DIP Credit Facility	$ 414,804	$ 284,625
Other, including capital lease obligations and other loans at interest rates generally ranging up to 7.7% due in installments through 2019	15,018	19,294
Total debt	429,822	303,919
Current maturities	(415,396)	(288,386)
Total long-term debt	$ 14,426	$ 15,533
Stated interest rate	7.70%	7.70%