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Earnings Per Common Share (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Earnings Per Common Share [Abstract]        
Weighted average number of shares outstanding (in shares) 4,636,395 4,631,504 4,639,204 4,127,969