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Income Taxes - Summary of Domestic and Foreign Pre-tax Loss (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]      
Domestic pre-tax income (loss) $ (78,112) $ (45,249) $ (18,419)
Foreign pre-tax income (loss) (165,824) (243,035) (251,633)
Total pre-tax income (loss) $ (243,936) $ (288,284) $ (270,052)