Condensed Consolidating Financial Statements Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Condensed Consolidated Statements of Comprehensive Income (Loss)
Comprehensive income (loss)	$ (6,586)	$ (1,510)	$ (31,305)	$ (36,447)
Reclassifications and Eliminations
Condensed Consolidated Statements of Comprehensive Income (Loss)
Comprehensive income (loss)	(5,480)	(17,679)	(3,835)	9,114
Parent
Condensed Consolidated Statements of Comprehensive Income (Loss)
Comprehensive income (loss)	(4,648)	7,277	(18,531)	(27,224)
Guarantor Subsidiaries
Condensed Consolidated Statements of Comprehensive Income (Loss)
Comprehensive income (loss)	6,190	16,222	2,503	(11,713)
Non-Guarantor Subsidiaries
Condensed Consolidated Statements of Comprehensive Income (Loss)
Comprehensive income (loss)	$ (2,648)	$ (7,330)	$ (11,442)	$ (6,624)