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Income Taxes
 6 Months Ended
Sep. 30, 2021
Income Tax Disclosure [Abstract]  
Income Taxes Income TaxesIncome taxes are recorded in our quarterly financial statements based on our estimated annual effective income tax rate, subject to adjustments for discrete events, should they occur. The effective tax rates used in the calculation of income taxes were 24.0% and 14.1% for the three months ended September 30, 2021 and 2020, respectively. The effective tax rates used in the calculation of income taxes were 24.2% and 19.8% for the six months ended September 30, 2021 and 2020, respectively. The lower effective tax rates in the three and six months ended September 30, 2020 were primarily due to final Global Intangible Low-Taxed Income regulations issued in July 2020, which resulted in the release of the valuation allowance on foreign tax credit carryforwards of $5.1 million.