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Income Taxes - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2021 | Dec. 31, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Jun. 30, 2021 | Jun. 30, 2020 | Sep. 30, 2020
Income Tax Disclosure [Line Items] |  |  |  |  |  |  |  |
U.S. federal statutory rates | 21.00% |  | 21.00% |  |  | 21.00% | 21.00% |
Effective income tax rate | 51.10% |  | 7.30% |  |  | 7.00% | 18.80% |
Income tax expense (benefit) | $ 6,064 | $ (9,415) | $ (2,211) | $ (6,707) | $ 2,769 | $ 2,865 | $ (6,149) | $ (4,724)
Change in income tax expense (benefit) | $ 8,300 |  |  |  |  | 9,000 |  |
Tax benefit related to stock-based compensation |  |  |  |  |  | 3,900 |  |
Netherlands |  |  |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |  |  |
Income tax expense (benefit) |  |  |  |  |  | $ (15,800) | $ (5,000) |

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