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Earnings Per Share (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Earnings Per Share (Textuals) [Abstract]        
The number of dilutive shares excluded from calculation of Basic Earning per share resulting from the dilutive effect of options 0 512,466 419,367 511,335
The number of potentially dilutive shares related to the Company's convertible debt with anti-dilutive effect 0 49,125 0 57,646