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Earnings Per Common Share (Details Textual) (Stock options [Member])
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Stock options [Member]
       
Earnings Per Common Share (Textual) [Abstract]        
Stock options excluded from calculation of earnings per share 72,000 72,000 72,000 56,000