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Income Taxes - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Income Tax Disclosure [Abstract] |  |  |  |
Effective tax rate (as percent) | 19.30% | 24.20% | (17.70%) | 24.30%
Pre-tax income (loss) | $ 63,414 | $ (417,302) | $ (48,267) | $ (412,762)

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