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Income Per Share - Additional Information (Details)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Income Per Share (Textual) [Abstract]    
Additional dilutive shares related to share-based compensation 381 403
Stock options
   
Income Per Share (Textual) [Abstract]    
Common stock shares effect would be anti-dilutive 34 54