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Earnings Per Share
 12 Months Ended
Dec. 31, 2013
Earnings Per Share [Abstract]  
Earnings Per Share
NOTE 13 Earnings Per Share
Basic and diluted earnings per common share are computed by dividing net earnings by the weighted average number of common shares outstanding and by the weighted average number of dilutive potential common shares, in accordance with accounting guidance related to earnings per share. The following table reconciles the number of common shares used in calculating the basic and diluted net earnings per share: 
 
 
2013
 
2012
 
2011
Basic average common shares outstanding1
 
22,081,026

 
23,298,663

 
22,913,881

Incremental shares due to:
 
 
 
 
 
 
Restricted stock units
 
53,803

 
24,086

 
220,457

Performance shares
 
129,003

 
291,036

 
817,946

Diluted average common shares outstanding
 
22,263,832

 
23,613,785

 
23,952,284

Basic net earnings per common share
 
$
4.84

 
$
2.75

 
$
1.73

Diluted net earnings per common share
 
4.80

 
2.72

 
1.66

Anti-dilutive shares excluded from calculation
 
41,337

 
9,992

 
88,674


1 
Basic average common shares outstanding include restricted stock awards that are fully vested, but are deferred for future issuance. See Note 14, "Equity-Based Compensation Plans" for further discussion.