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Earnings per Common Share (Tables)
3 Months Ended
Mar. 31, 2016
Earnings Per Share [Abstract]  
Reconciliation of Number of Common Shares Used in Calculating Basic and Diluted Net Earnings per Share
The following table reconciles the number of common shares used in calculating the basic and diluted net earnings per share:
 
Three Months Ended March 31,
 
2016
 
2015
Basic average common shares outstanding1
17,531,703

 
19,334,729

Incremental shares due to:
 
 
 
Restricted stock units
48,033

 
55,734

Performance shares
23,396

 
74,306

Diluted average common shares outstanding
17,603,132

 
19,464,769

 
 
 
 
Basic net earnings per common share
$
1.05

 
$
0.30

Diluted net earnings per common share
1.05

 
0.30

 
 
 
 
Anti-dilutive shares excluded from calculation
710,062

 
399,452

1 
Basic average common shares outstanding include restricted stock awards that are fully vested, but are deferred for future issuance.