Condensed Consolidating Financial Statements Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Condensed Consolidated Statements of Comprehensive Income (Loss)
Comprehensive income (loss)	$ 6,781	$ (6,900)	$ (24,524)	$ (43,347)
Reclassifications and Eliminations
Condensed Consolidated Statements of Comprehensive Income (Loss)
Comprehensive income (loss)	(23,211)	(1,547)	(27,046)	7,567
Parent
Condensed Consolidated Statements of Comprehensive Income (Loss)
Comprehensive income (loss)	8,602	(10,474)	(9,929)	(37,698)
Guarantor Subsidiaries
Condensed Consolidated Statements of Comprehensive Income (Loss)
Comprehensive income (loss)	29,828	4,604	32,331	(7,109)
Non-Guarantor Subsidiaries
Condensed Consolidated Statements of Comprehensive Income (Loss)
Comprehensive income (loss)	$ (8,438)	$ 517	$ (19,880)	$ (6,107)