CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Net sales	$ 486,855	$ 480,273	$ 700,660	$ 691,742
Cost of sales	272,742	256,400	399,951	381,097
Gross profit	214,113	223,873	300,709	310,645
Selling, general and administrative expenses	162,900	164,290	313,204	301,544
Income (loss) from operations	51,213	59,583	(12,495)	9,101
Other expense (income), net:
Interest income	(65)	(30)	(181)	(84)
Interest expense	1,532	2,000	2,567	2,438
Other, net	(96)	(29)	(41)	(125)
Total other expense, net	1,371	1,941	2,345	2,229
Income (loss) before income taxes	49,842	57,642	(14,840)	6,872
Income tax expense (benefit)	13,465	16,912	(3,890)	3,204
Net income (loss)	36,377	40,730	(10,950)	3,668
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on foreign currency hedging	1,027	1,701	(436)	1,441
Foreign currency translation adjustment	(1,091)	(4,976)	1,675	(4,500)
Total other comprehensive (loss) income, net	(64)	(3,275)	1,239	(3,059)
Comprehensive income (loss)	$ 36,313	$ 37,455	$ (9,711)	$ 609
Net income (loss) per share:
Basic (in dollars per share)	$ 1.12	$ 1.18	$ (0.33)	$ 0.11
Diluted (in dollars per share)	$ 1.11	$ 1.17	$ (0.33)	$ 0.10
Weighted-average common shares outstanding:
Basic (in shares)	32,511	34,632	32,812	34,629
Diluted (in shares)	32,775	34,954	32,812	34,941