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Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2013
Earnings Per Share [Abstract]  
Calculation of Basic and Diluted Earnings per Common Share
The following table provides a reconciliation of the common shares used for basic earnings per share and diluted earnings per share (in thousands):
 
Three Months Ended March 31,
 
2013
 
2012
Weighted average number of common shares used for basic earnings per share (a)
26,147

 
25,931

Effect of potential dilutive shares (b)

 

Weighted average number of common shares and potential dilutive shares used for diluted earnings per share
26,147

 
25,931

Anti-dilutive shares outstanding at period-end that are excluded from the above reconciliation (c)
5,349

 
4,916