Condensed Consolidating Financial Statements (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Condensed Consolidated Statements of Comprehensive Income (Loss)
Comprehensive income (loss)	$ (4,318)	$ (7,201)	$ (8,459)	$ (40,615)
Reportable legal entities | Parent
Condensed Consolidated Statements of Comprehensive Income (Loss)
Comprehensive income (loss)	(44)	(10,576)	(4,354)	(44,087)
Reportable legal entities | Guarantor Subsidiaries
Condensed Consolidated Statements of Comprehensive Income (Loss)
Comprehensive income (loss)	14,431	(9,936)	15,850	(34,978)
Reportable legal entities | Non-Guarantor Subsidiaries
Condensed Consolidated Statements of Comprehensive Income (Loss)
Comprehensive income (loss)	(1,933)	10,608	3,815	11,752
Reclassifications and Eliminations
Condensed Consolidated Statements of Comprehensive Income (Loss)
Comprehensive income (loss)	$ (16,772)	$ 2,703	$ (23,770)	$ 26,698