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Income Taxes (Narrative) (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2016
Income Tax Disclosure [Abstract]    
U.S. Federal statutory rate (percent) 35.00% 35.00%
Federal    
Income Taxes Disclosure [Line Items]    
Earliest year remaining open for audit and/or settlement in major taxing jurisdictions   2012
State | Minimum    
Income Taxes Disclosure [Line Items]    
Earliest year remaining open for audit and/or settlement in major taxing jurisdictions   2008
State | Maximum    
Income Taxes Disclosure [Line Items]    
Earliest year remaining open for audit and/or settlement in major taxing jurisdictions   2011