CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (41,734)	$ (49,504)	$ (113,971)	$ (10,723)
Other comprehensive income (loss):
Foreign currency translation adjustments	115	0	(1,700)	257
Unrealized gains (losses) on cash flow hedges:
Unrealized cash flow hedge gains (losses) arising during the period	(5,622)	(446)	(853)	(5,093)
Net (gains) losses reclassified into income for revenue hedges	(1,488)	1,357	(2,637)	2,506
Net (gains) losses reclassified into income for cost of revenue hedges	6	(61)	(73)	(193)
Net (gains) losses reclassified into income for interest rate swaps	1,029	0	(2,006)	0
Net unrealized gains (losses) on cash flow hedges	(6,075)	850	(1,557)	(2,780)
Unrealized holding gains (losses) during the period	0	(658)	198	(449)
Aggregate income tax benefit (expense) of the above items	1,324	181	1,222	182
Other comprehensive income (loss)	(4,636)	373	(1,837)	(2,790)
Comprehensive loss	$ (46,370)	$ (49,131)	$ (115,808)	$ (13,513)