CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Net sales	$ 485,944	$ 486,855	$ 660,337	$ 700,660
Cost of sales	269,519	272,742	367,660	399,951
Gross profit	216,425	214,113	292,677	300,709
Selling, general and administrative expenses	162,402	162,900	316,973	313,204
Income (loss) from operations	54,023	51,213	(24,296)	(12,495)
Other expense (income), net:
Interest income	(103)	(65)	(307)	(181)
Interest expense	1,943	1,532	3,378	2,567
Other, net	(289)	(96)	(958)	(41)
Total other expense, net	1,551	1,371	2,113	2,345
Income (loss) before income taxes	52,472	49,842	(26,409)	(14,840)
Income tax expense (benefit)	13,167	13,465	(6,796)	(3,890)
Net income (loss)	39,305	36,377	(19,613)	(10,950)
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on foreign currency hedging	(890)	1,027	2,019	(436)
Foreign currency translation adjustment	(856)	(1,091)	2,843	1,675
Total other comprehensive income (loss)	(1,746)	(64)	4,862	1,239
Comprehensive income (loss)	$ 37,559	$ 36,313	$ (14,751)	$ (9,711)
Net income (loss) per share:
Basic (in USD per share)	$ 1.23	$ 1.12	$ (0.61)	$ (0.33)
Diluted (in USD per share)	$ 1.21	$ 1.11	$ (0.61)	$ (0.33)
Weighted-average common shares outstanding:
Basic (in shares)	32,057	32,511	32,041	32,812
Diluted (in shares)	32,422	32,775	32,041	32,812