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Income Taxes (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax [Line Items]      
Operating loss carryforwards $ 95,932    
Accrued income taxes   $ 63  
Prepaid income taxes 4    
Interest expense related to unrecognized tax benefits 0 $ 0 $ 79
Income tax examination, estimate of possible loss     $ 4,683
Capital Loss Carryforward [Member]      
Income Tax [Line Items]      
Tax credit carryforward $ 132,656