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Stock-Based Compensation (Tables)
12 Months Ended
Dec. 26, 2015
Stock-Based Compensation [Abstract]  
Weighted average assumptions used in calculating fair value of stock options
The weighted average of key assumptions used in determining the fair value of options granted and a discussion of the methodology used to develop each assumption are as follows:
 
 
 
2015
 
 
2014
 
 
2013
 
 
 
 
 
 
 
 
 
 
 
Expected term
 
5.5 years
 
 
5.6 years
 
 
5.9 years
 
Expected price volatility
 
 
26.2%
 
 
 
34.3%
 
 
 
39.7%
 
Risk-free interest rate
 
 
1.7%
 
 
 
1.7%
 
 
 
0.7%
 
Dividend yield
 
 
0.9%
 
 
 
1.0%
 
 
 
0.9%
 
Summary of the stock option activity
A summary of the activity and related information follows:

  
Stock Options
  
Restricted Stock Awards
 
 
(Shares in thousands)
 
Shares
  
Weighted Average Exercise Price
  
Shares
  
Weighted Average Grant Date Fair Value
 
         
Outstanding at December 27, 2014
  
1,127
  
$
17.38
   
727
  
$
25.21
 
Granted
  
223
   
32.59
   
193
   
32.54
 
Exercised
  
(149
)
  
13.95
   
(214
)
  
22.49
 
Forfeited
  
(3
)
  
30.61
   
(1
)
  
28.28
 
                 
Outstanding at December 26, 2015
  
1,198
   
20.59
   
705
   
28.08