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Income Taxes (Domestic and Foreign Income) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Disclosure [Abstract]      
United States $ 4,502 $ 4,760 $ 56,729
Foreign (1,358) 5,874 141
Income before income taxes $ 3,144 $ 10,634 $ 56,870