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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017
Income Tax Disclosure [Abstract] |  |  |  |
Expense (benefit) from income taxes | $ 3,230 | $ 2,172 | $ (35,679) | $ (18,472)
Effective income tax rate | (36.00%) | (9.00%) | 32.00% | 27.00%
U.S. statutory federal income tax rate, percent |  |  | 21.00% | 35.00%
Increase (decrease) in gross unrecognized tax benefits |  |  | $ 5,100 |

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