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Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2011
Reconciliation of Weighted Average Shares Used in Calculating Basic and Diluted Earnings Per Share
A reconciliation of weighted average shares used in calculating basic and diluted earnings per share follows:
 
   
For the Three Months Ended
   
For the Six Months Ended
 
(000's omitted)
 
June 30,
(unaudited)
   
June 30,
(unaudited)
 
   
2011
   
2010
   
2011
   
2010
 
Basic
   
72,962
     
72,169
     
72,865
     
71,855
 
Effect of exercise of stock options
   
1,172
     
1,958
     
1,222
     
1,949
 
Effect of contingent common stock issuance
   
-
     
-
     
72
     
176
 
Effect of assumed vesting of restricted stock
   
1,289
     
622
     
1,237
     
609
 
Diluted
   
75,423
     
74,749
     
75,396
     
74,589