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Income Taxes - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2019
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Provision for income taxes | $ 14,467 | $ 9,309 | $ 18,405 | $ 10,295 |
Effective income tax rates (as a percent) | 11.00% | 7.60% | 7.20% | 4.60% |
Full statutory income tax rate (as a percent) | 13.67% |  |  |  |
Discrete tax benefit from adjustment of deferred tax assets and liabilities in Switzerland |  |  | $ 1,700 |  |
Discrete tax benefits from reversal of uncertain tax positions |  |  | 2,700 | $ 2,300 |
Unrecognized tax benefits | $ 85,000 |  | 85,000 |  | $ 76,500
Accrued interest and penalties related to uncertain tax positions | 2,700 |  | 2,700 |  | 2,500
Expected decrease in uncertain tax positions | 4,100 |  | 4,100 |  |
Non-current income tax payable |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Unrecognized tax benefits | $ 38,200 |  | 38,200 |  | $ 36,400
UNITED STATES |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Discrete tax benefits from recognition of excess tax benefits in the United States |  |  | $ 6,000 | $ 9,500 |

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