CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Net sales	$ 209,717	$ 174,393
Cost of sales	119,092	98,141
Gross profit	90,625	76,252
Selling, general and administrative expenses	146,881	154,571
Loss from operations	(56,256)	(78,319)
Other expense (income), net:
Interest income	(452)	(204)
Interest expense	1,007	1,435
Other income, net	(224)	(669)
Total other expense, net	331	562
Loss before income taxes	(56,587)	(78,881)
Income tax benefit	(14,466)	(19,963)
Net loss	(42,121)	(58,918)
Other comprehensive (loss) income, net of tax:
Unrealized (loss) gain on foreign currency exchange rate hedges	(3,772)	2,909
Foreign currency translation adjustment	1,550	3,699
Total other comprehensive (loss) income	(2,222)	6,608
Comprehensive loss	$ (44,343)	$ (52,310)
Net loss per share:
Basic (in dollars per share)	$ (1.32)	$ (1.84)
Diluted (in dollars per share)	$ (1.32)	$ (1.84)
Weighted-average common shares outstanding:
Basic (in shares)	31,991	32,024
Diluted (in shares)	31,991	32,024