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Employee Stock-Based Compensation (Share-Based Compensation Expense) (Details) - USD ($) $ in Thousands | 12 Months Ended
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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

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- 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 + Details
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- Definition 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 + Details
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