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Income Taxes Income Taxes (Domestic and Foreign Income) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]      
United States $ (26,982) $ 78,884 $ 56,950
Foreign 5,866 0 0
Income (loss) before income taxes $ (21,116) $ 78,884 $ 56,950