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Income Taxes (Income (Loss) Before Provision For Income Taxes From Continuing Operations By Geographic Area) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Taxes [Abstract]      
Domestic $ (28,671) $ (22,698) $ (16,623)
Foreign 115,974 (143,897) 963
Total $ 87,303 $ (166,595) $ (15,660)