Debtor Financial Statements - Debtor Cash Flows (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Condensed Financial Statements, Captions [Line Items]
Net cash used in operating activities	$ (222,801)	$ (50,330)
Capital expenditures	(36,268)	(49,621)
Proceeds from asset sales	4,085	1,084
Net cash used in investing activities	(28,612)	(48,537)
Increase in other debt	270,915	(1,928)
Financing fees and other	(28,475)	0
Net cash provided by financing activities	230,248	18,393
Net increase in cash and cash equivalents	(20,845)	(81,087)
Cash and cash equivalents, beginning of period	104,289	155,368
Cash and cash equivalents, end of period	83,444
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash used in operating activities	(217,406)
Capital expenditures	14,410
Proceeds from asset sales	0
Net cash used in investing activities	14,398
Increase in other debt	(267,207)
Financing fees and other	28,475
Net cash provided by financing activities	238,732
Net increase in cash and cash equivalents	6,928
Cash and cash equivalents, beginning of period	26,419
Cash and cash equivalents, end of period	$ 33,347