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Earnings Per Share (Details Textual)
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Options, Outstanding (in shares) 4,048,198 3,758,198 3,898,198
Antidilutive Securities Excluded From Computation Of Earnings Per Share, Amount 4,048,198 3,123,198  
Class N Preferred Stock [Member]
      
Convertible Preferred Stock, Shares Issuable upon Conversion The Company's Class N preferred shares, each of which is convertible to 40 common shares The Company's Class N preferred shares, each of which is convertible to 40 common shares