CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Net sales (Note 12 and Note 13)	$ 3,150,339	$ 2,545,641	$ 2,132,689
Cost of sales	1,542,788	1,171,551	1,029,016
Gross profit	1,607,551	1,374,090	1,103,673
Selling, general, and administrative expenses	1,042,844	869,885	765,538
Income from operations (Note 12)	564,707	504,205	338,135
Interest income	(1,901)	(2,637)	(7,261)
Interest expense	2,083	6,028	5,046
Other income, net	(113)	(700)	(516)
Total other expense (income), net	69	2,691	(2,731)
Income before income taxes	564,638	501,514	340,866
Income tax expense (Note 5)	112,689	118,939	64,724
Net income	451,949	382,575	276,142
Other comprehensive (loss) income
Foreign currency translation (loss) gain	(8,212)	8,816	(2,905)
Total other comprehensive (loss) income	(8,212)	8,816	(2,905)
Comprehensive income	$ 443,737	$ 391,391	$ 273,237
Net income per share
Basic (in dollars per share)	$ 16.43	$ 13.64	$ 9.73
Diluted (in dollars per share)	$ 16.26	$ 13.47	$ 9.62
Weighted-average common shares outstanding (Note 11)
Basic (in shares)	27,508	28,055	28,385
Diluted (in shares)	27,789	28,406	28,694