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Earnings Per Share (Details Textual)
9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Earnings Per Share (Additional Textual) [Abstract]    
Antidilutive securities excluded from computation of earnings per share 1,061,375 1,116,000
Maximum expiry period of stock options under the option plan 10 years  
Option Plan [Member]
   
Earnings Per Share (Textual) [Abstract]    
Number of shares common stock for issuance under its 2005 Stock Option Plan 3,000,000