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Income Taxes (Narrative) (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Income Tax [Line Items]        
Effective tax rates (as a percent) 39.00% (7.00%) 40.40% (12.00%)
Minimum        
Income Tax [Line Items]        
Effective income tax rate on foreign earnings     0.00%  
Maximum        
Income Tax [Line Items]        
Effective income tax rate on foreign earnings     35.00%