Income Taxes (Narrative) (Details)
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Income Taxes [Line Items]        
Effective income tax rates 0.00% 35.90% 5.80% 36.90%
Corporate Income Tax Rate     35.00% 35.00%