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Income Taxes - Income (Loss) Before Provision for Income Taxes (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Tax Disclosure [Abstract]      
U.S. entities $ (74,131) $ 26,552 $ 54,077
International entities 40,760 18,135 (7,182)
Income (Loss) before (Provision) Benefit for Income Taxes $ (33,371) $ 44,687 $ 46,895