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Income Taxes (Narrative) (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Income Taxes (Textual) [Abstract]        
Effective tax rate, percent 28.00% 30.00% 31.00% 29.00%
Federal statutory tax rate, percent     35.00%