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Earnings Per Share (Details Textual)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Earnings Per Share (Textual) [Abstract]        
Antidilutive shares excluded from the diluted earnings per share calculations 0 84,250 0 84,250
Shares issuable under stock options plans 75,500   75,500