Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Narrative) (Details)

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Income Taxes (Narrative) (Details)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Income Tax Disclosure [Abstract]    
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate 35.00%  
Effective tax rate (as a percent) 17.00% 28.00%