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Income Taxes - Income Tax (Benefit) Expense (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Components Of Income Tax Expense Benefit Continuing Operations [Abstract]        
Income tax benefit $ (105,251) $ (47,219) $ (98,313) $ (1,432)
Effective tax rate 13.40%   12.60%