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Income Tax Expense Income Tax Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |  |
Effective Income Tax Rate, Continuing Operations | 22.30% | 20.80% | 21.30% | 19.30%
Uncertain Tax Liability Resulting From IRS Notice | $ 50,000 |  | $ 50,000 |
Income Tax Examination, Estimate of Possible Loss |  |  | $ 12,000 |

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