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Income Taxes - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2023 | Mar. 31, 2023
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |
Effective income tax rate (as a percent) | 29.80% | 25.60% | 24.70% | 23.30% |  |
Income tax reserves | $ 106,801 |  | $ 106,801 |  | $ 769,800 | $ 552,623
Deferred tax assets decrease | 656,200 |  |  |  |  |
Decrease in accrued interest on uncertain tax positions | 5,300 |  |  |  |  |
Unrecognized tax benefits, prior period | 31,700 |  |  |  |  |
Minimum |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |
Potential future tax expense that would arise | 40,400 |  | 40,400 |  |  |
Maximum |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |
Potential future tax expense that would arise | 64,900 |  | 64,900 |  |  |
Tax Years 2013-2015 |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |
Income tax assessments |  |  | $ 11,800 |  |  |
Tax Year 2023 |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |
Unrecognized tax benefits, prior period | 22,000 |  |  |  |  |
Six Months Ended September 30, 2023 |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |
Unrecognized tax benefits, prior period | $ 9,700 |  |  |  |  |

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