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Income Taxes (Schedule of Effective Tax Rate) (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Income Tax Disclosure [Abstract]        
Effective income tax rate 20.00% 27.00% (6.00%) 25.00%