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Income Taxes (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2015
Operating Loss Carryforwards [Line Items]      
Decreased deferred income tax expense   $ 600  
Tax Year 2014 [Member]      
Operating Loss Carryforwards [Line Items]      
Net reduction in taxes due to the federal government $ 17,600    
Income tax refund receivable 3,700   $ 2,300
Interest expense 600    
Increase reserve provision $ 4,100    
Deferred Income Taxes [Member]      
Operating Loss Carryforwards [Line Items]      
Decreased deferred income tax expense   $ 24,200