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Stock Incentive Plans (Tables)
9 Months Ended
Sep. 30, 2011
Stock Incentive Plans (Tables) [Abstract] 
Summary of stock options activity
                                 

Stock Options

  Number of
Shares
(000’s)
    Weighted
Average
Exercise Price
    Weighted Average
Remaining
Contract Life (years)
    Aggregate
Intrinsic
Value ($000’s)
 

Options at beginning of year

    1,207     $ 39.45       8.0          

Options granted

    289       49.17                  

Options exercised

    (153     37.43                  

Options terminated

    (7     43.02                  
   

 

 

   

 

 

   

 

 

   

 

 

 

Options at end of period

    1,336     $ 41.77       7.8     $ 14,255  
   

 

 

   

 

 

   

 

 

   

 

 

 

Options exercisable at end of period

    506     $ 38.90       6.2     $ 6,842  

Weighted average fair value of options granted during the period

          $ 9.60