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Component of Consolidated (Loss) Income 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. $ (160,032) $ (95,898) $ (114,484)
Non U.S. 1,133 744 2,040
Total $ (158,899) $ (95,154) $ (112,444)