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Income Taxes (Classification of Net Deferred Tax Asset) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Income Taxes [Abstract]    
Current deferred income tax assets   $ 1,239
Current deferred income tax liabilities   (39)
Long-term deferred income tax assets $ 10,542 1,436
Long-term deferred income tax liabilities (9,760) (41,332)
Deferred Tax Assets, Net Of Valuation Allowance 48,067 6,676
Net deferred tax asset $ 782  
Net deferred tax (liabilities)   $ (38,696)