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Income Per Share (Details Textual)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Income Per Share (Textual) [Abstract]        
Additional dilutive shares related to share- based compensation 245 305 270 305
Stock options [Member]
       
Income Per Share (Textual) [Abstract]        
Common stock shares effect would be antidilutive     390,000 330,000