v2.3.0.11
Stock-Based Compensation (Tables)
6 Months Ended
Jun. 25, 2011
Notes to Financial Statements [Abstract]  
Weighted-Average Assumptions Used in Determining the Fair Values of Stock Options Using the Black-Scholes Valuation Model
The following weighted-average assumptions were used in determining the fair values of stock options using the Black-Scholes valuation model:
 
   
2011
 
2010
Expected dividend yield
 
0%
 
0%
Expected stock price volatility
 
20%
 
20%
Risk-free interest rate
 
2.13%
 
2.37%
Expected life of options (years)
 
4.75
 
4.5
 
Summary of the Stock Option Activity Under the Plans
The following table summarizes stock option activity under the Plans during the six months ended June 25, 2011:
 
   
Shares
  
Weighted Average Exercise Price
  
Weighted
Average
Remaining Contractual
Life in
Years
  
Aggregate
Intrinsic Value
 
Outstanding at beginning of period
  5,012  $43.05       
Granted
  10   69.45       
Exercised
  (743)  37.85       
Forfeited
  (15)  39.72       
Outstanding at end of period
  4,264  $44.02  4.4  $108,750 
                 
Options exercisable at end of period
  3,972  $42.92  4.2  $105,655 
 
Status of Non-Vested Restricted Shares/Units
The following tables summarize the status of our non-vested restricted stock/units for the six months ended June 25, 2011:
 
   
Time-Based Restricted Stock/Units
   
Shares/Units
  
Weighted Average
Grant Date Fair
Value
  
Aggregate Intrinsic Value
Outstanding at beginning of period
  743  $34,804   
Granted
  230   15,981   
Vested
  (85)  (4,369)  
Forfeited
  (8)  (381)  
Outstanding at end of period
  880  $46,035 
 61,212
 
   
Performance-Based Restricted Stock/Units
   
Shares/Units
  
Weighted Average
Grant Date Fair
Value
  
Aggregate Intrinsic Value
Outstanding at beginning of period
  1,347  $42,083   
Granted
  451   32,339   
Vested
  (45)  (2,720)  
Forfeited
  (7)  (349)  
Outstanding at end of period
  1,746  $71,353 
 121,350