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Earnings Per Common Share (Narrative) (Details) (USD $)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
Options and Warrants [Member]
Minimum [Member]
Dec. 31, 2012
Options and Warrants [Member]
Minimum [Member]
Mar. 31, 2013
Options and Warrants [Member]
Maximum [Member]
Dec. 31, 2012
Options and Warrants [Member]
Maximum [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Shares not included in computation of earnings per common share 182,351 261,583        
Exercise price of common shares     $ 2.75 $ 2.57 $ 5.75 $ 6.10