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Income Taxes - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
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)