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Income Taxes - Reconciliation of Income Tax (Details) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Income Tax Disclosure [Abstract] |  |  |
Income tax expense computed at U.S. federal statutory rate | $ 179,197 | $ 77,269 | $ 126,981
Increases (reductions) resulting from: |  |  |
State and local income taxes, net of federal tax | 85,486 | 32,599 | 28,762
Foreign income taxes, net of federal tax | (7,932) | 4,765 | 9,243
Non-deductible expenses, including non-deductible penalties | 4,867 | 34,825 | 859
Excess tax benefits from stock-based compensation | (10,091) | (5,247) | (4,227)
Research and development and other federal credits | (31,289) | (33,159) | (34,080)
Executive compensation -162(m) | 6,307 | 4,295 | 3,614
Foreign-Derived Intangible Income (FDII) | (13,971) | (15,869) | (9,115)
Changes in uncertain tax positions (including indirect effects) | 37,592 | (6,498) | 16,938
Other | (2,552) | 3,754 | (1,509)
Total | $ 247,614 | $ 96,734 | $ 137,466

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- Definition Amount of reported income tax benefit from difference to expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to foreign-derived intangible income (FDII). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-12 + Details
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