CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Net sales	$ 4,298,467	$ 4,538,818	$ 5,481,101
Cost of goods sold	2,509,418	2,806,438	3,204,072
Amortization of intangible assets	11,028	12,865	14,023
Gross profit	1,778,021	1,719,515	2,263,006
Operating expenses:
Marketing and selling	730,310	809,182	1,025,899
Research and development	287,243	280,796	291,844
General and administrative	155,056	124,652	148,648
Amortization of intangible assets and acquisition-related costs	10,934	11,843	16,947
Impairment of intangible assets	3,526	0	7,000
Change in fair value of contingent consideration for business acquisition	(250)	0	(3,509)
Restructuring charges, net	3,866	34,573	2,165
Total operating expenses	1,190,685	1,261,046	1,488,994
Operating income	587,336	458,469	774,012
Interest income	50,636	18,331	1,246
Other income (expense), net	(16,376)	(13,278)	560
Income before income taxes	621,596	463,522	775,818
Provision for income taxes	9,453	98,947	131,305
Net income	$ 612,143	$ 364,575	$ 644,513
Net income per share:
Basic (in dollars per share)	$ 3.90	$ 2.25	$ 3.85
Diluted (in dollars per share)	$ 3.87	$ 2.23	$ 3.78
Weighted average shares used to compute net income per share:
Basic (in shares)	156,776	162,302	167,447
Diluted (in shares)	158,171	163,704	170,414