CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Net sales (Note 12 and Note 13)	$ 4,287,763	$ 3,627,286	$ 3,150,339
Cost of sales	1,902,275	1,801,916	1,542,788
Gross profit	2,385,488	1,825,370	1,607,551
Selling, general, and administrative expenses	1,457,974	1,172,619	1,042,844
Income from operations (Note 12)	927,514	652,751	564,707
Interest income	(52,208)	(15,563)	(1,901)
Interest expense	2,564	3,442	2,083
Other income, net	(1,783)	(1,210)	(113)
Total other (income) expense, net	(51,427)	(13,331)	69
Income before income taxes	978,941	666,082	564,638
Income tax expense (Note 5)	219,378	149,260	112,689
Net income	759,563	516,822	451,949
Foreign currency translation loss	(11,698)	(14,080)	(8,212)
Total other comprehensive loss, net of tax	(11,698)	(14,080)	(8,212)
Comprehensive income	$ 747,865	$ 502,742	$ 443,737
Net income per share
Basic (in dollars per share)	$ 29.36	$ 19.50	$ 16.43
Diluted (in dollars per share)	$ 29.16	$ 19.37	$ 16.26
Weighted-average common shares outstanding (Note 11)
Basic (in shares)	25,871	26,504	27,508
Diluted (in shares)	26,048	26,686	27,789