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Income Taxes - Components of Pretax (Loss) Income from Continuing Operations (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]      
U.S $ (94,438) $ (138,826) $ (169,345)
Foreign     522
PRETAX LOSS $ (94,438) $ (138,826) $ (168,823)