Debt - 10.5% Senior Notes Narrative (Details) (USD $)	0 Months Ended			12 Months Ended
	Apr. 03, 2012	Mar. 27, 2012	May 05, 2010	Mar. 31, 2015	Mar. 31, 2014
Debt Instrument [Line Items]
Interest payable				$ 15,678,000	$ 15,735,000
10.5% Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)			10.50%	10.50%	10.50%
Proceeds from Issuance of Debt	15,000,000	110,000,000	230,000,000
Net proceeds			222,200,000
Percentage of capital stock of foreign restricted subsidiaries kept as first priority lien			51.00%
Redemption price upon change of control as a percentage of the principal amount				101.00%
Issue price as percentage of principal amount plus accrued interest		105.50%
Unamortized premium		6,100,000		2,461,000	3,144,000
Debt issuance cost, net of amortization				4,100,000	5,400,000
Interest payable				$ 15,500,000
Effective interest rate (as a percent)				10.30%
10.5% Senior Notes | Minimum
Debt Instrument [Line Items]
Minimum percentage of aggregate principal amount held by holders to declare notes due and payable				25.00%