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Employee Stock-Based Compensation (Share-Based Compensation Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Share-based compensation expense and related tax benefit
Total share-based compensation expense	$ 89,913	$ 82,889	$ 70,782
Income tax benefit	(20,148)	(15,305)	(9,750)
Total share-based compensation expense, net of income tax benefit	69,765	67,584	61,032
Cost of goods sold
Share-based compensation expense and related tax benefit
Total share-based compensation expense	10,021	8,004	5,635
Marketing and selling
Share-based compensation expense and related tax benefit
Total share-based compensation expense	40,378	35,780	34,707
Research and development
Share-based compensation expense and related tax benefit
Total share-based compensation expense	20,180	17,836	15,292
General and administrative
Share-based compensation expense and related tax benefit
Total share-based compensation expense	$ 19,334	$ 21,269	$ 15,148

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479830/718-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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Amount, after tax, of expense for award under share-based payment arrangement.

+ References

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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