Condensed Consolidating Financial Statements - Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Other comprehensive income (loss)	$ (56,258)	$ (61,123)	$ (58,013)
Parent
Condensed Financial Statements, Captions [Line Items]
Other comprehensive income (loss)	(49,918)	(32,103)	(62,676)
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Other comprehensive income (loss)	(24,832)	19,650	(57,309)
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Other comprehensive income (loss)	5,873	(20,672)	35,640
Reclassifications and Eliminations
Condensed Financial Statements, Captions [Line Items]
Other comprehensive income (loss)	$ 12,619	$ (27,998)	$ 26,332