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Income Taxes (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Income Tax Disclosure [Abstract]        
Effective Income Tax Rate 28.00% 26.20% 25.50% 30.70%
Federal Statutory Income Tax Rate     35.00%