Condensed Consolidating Financial Statements (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Condensed Consolidated Statements of Comprehensive Income (Loss)
Total comprehensive income (loss)	$ (10,595)	$ (33,589)	$ (58,631)	$ 4,146
Parent
Condensed Consolidated Statements of Comprehensive Income (Loss)
Total comprehensive income (loss)	(12,691)	(31,115)	(57,891)	10,877
Guarantor Subsidiaries
Condensed Consolidated Statements of Comprehensive Income (Loss)
Total comprehensive income (loss)	3,420	12,678	(13,847)	35,122
Non-Guarantor Subsidiaries
Condensed Consolidated Statements of Comprehensive Income (Loss)
Total comprehensive income (loss)	(3,965)	(35,995)	(9,011)	(8,577)
Reclassifications and Eliminations
Condensed Consolidated Statements of Comprehensive Income (Loss)
Total comprehensive income (loss)	$ 2,641	$ 20,843	$ 22,118	$ (33,276)