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Income Taxes (Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2011
Dec. 31, 2013
Dec. 31, 2012
Operating Loss Carryforwards [Line Items]          
Unrecognized tax benefits, decrease resulting from settlements with taxing authorities     $ 7,300    
Increase in income tax benefit $ (1,700) $ (1,700)      
Unrecognized tax benefits, increase resulting from settlements with taxing authorities   5,600      
Unrecognized tax benefits, decrease to interest on income tax expense 600 600      
Change in valuation allowance 100        
Unrecognized tax benefits 814 $ 515   $ 7,832 $ 7,747
State          
Operating Loss Carryforwards [Line Items]          
Operating loss carryforwards 46,200        
Federal          
Operating Loss Carryforwards [Line Items]          
Income tax deductions $ 1,600