CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net sales	$ 721,902	$ 623,525	$ 1,226,580	$ 906,694
Cost of sales	354,814	304,548	598,989	445,151
Gross profit	367,088	318,977	627,591	461,543
Selling, general, and administrative expenses	238,907	190,373	437,578	340,638
Income from operations	128,181	128,604	190,013	120,905
Interest income	(460)	(452)	(942)	(1,126)
Interest expense	913	1,205	1,809	2,395
Other expense (income), net	48	(113)	(185)	(256)
Total other expense, net	501	640	682	1,013
Income before income taxes	127,680	127,964	189,331	119,892
Income tax expense	25,617	26,410	39,144	26,311
Net income	102,063	101,554	150,187	93,581
Other comprehensive (loss) income
Unrealized gain (loss) on cash flow hedges, net of tax	1,033	(800)	2,491	(447)
Foreign currency translation (loss) gain	(2,537)	6,395	(644)	7,048
Total other comprehensive (loss) income	(1,504)	5,595	1,847	6,601
Comprehensive income	$ 100,559	$ 107,149	$ 152,034	$ 100,182
Net income per share
Basic (in dollars per share)	$ 3.69	$ 3.62	$ 5.42	$ 3.34
Diluted (in dollars per share)	$ 3.66	$ 3.58	$ 5.37	$ 3.30
Weighted-average common shares outstanding
Basic (in shares)	27,651	28,046	27,731	28,024
Diluted (in shares)	27,896	28,335	27,978	28,314