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Net Income Per Common Share and Other Comprehensive Income Narrative (Details)
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Incremental Common Shares Attributable to Call Options and Warrants  0 
Stock Option [Member]
    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share5,800,0005,800,0005,000,0005,400,000