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Share-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2011
Stock Option Plans
     Weighted
Average
Price
     Number of
Shares
    Weighted
Average
Remaining
Contractual
Life (In Years)
     Aggregate
Intrinsic Value
 

Outstanding, January 1, 2011

   $ 9.13         3,002,000        

Granted

     16.11         510,000        

Cancelled

     9.13         (71,000     

Exercised

     4.70         (469,000     
  

 

 

    

 

 

      

Outstanding, September 30, 2011

   $ 10.97         2,972,000        6.25       $ 15,370,000   
  

 

 

    

 

 

   

 

 

    

 

 

 

Options exercisable as of September 30, 2011

        1,418,000        4.18       $ 12,062,000   
     

 

 

   

 

 

    

 

 

 
Summarized Information Of Stock Options Outstanding
                                 Options  
     Options Outstanding             Exercisable  

Exercise Price Range

   Number
Outstanding
     Average
Remaining
Contractual Life
     Weighted
Average
Exercise price
     Number
Exercisable
     Weighted
Average
Exercise Price
 

$1.83 - 2.50

     199,000         1.12       $ 2.43         199,000       $ 2.43   

3.68- 3.68

     358,000         2.24         3.69         358,000         3.69   

6.07- 6.07

     300,000         3.24         6.07         300,000         6.07   

10.39- 10.39

     516,000         7.27         10.39         185,000         10.39   

$13.93 - 16.11

     1,599,000         8.02         14.77         376,000         14.05   
  

 

 

    

 

 

    

 

 

    

 

 

    

 

 

 
     2,972,000         6.25       $ 10.97         1,418,000       $ 7.63   
  

 

 

    

 

 

    

 

 

    

 

 

    

 

 

 
Information Pertaining To Option Activity
     September 30,
2011
     September 30,
2010
 

Weighted average grant-date fair value of stock options granted:

   $ 1,477,000       $ 2,176,000   

Total fair value of stock options vested:

   $ 1,015,000       $ 681,000   

Total intrinsic value of stock options exercised:

   $ 4,736,000       $ 3,738,000   

Total pre-tax share-based compensation expense charged against income:

   $ 1,402,000       $ 740,000   

Total unrecognized compensation expense related to non-vested options:

   $ 4,015,000       $ 3,631,000   
Total Pre-Tax Share-Based Compensation Expense Charged Against Income Under Employee Stock Purchase Plan
Stock Option Plans [Member]
 
Assumption For Fair Value Of Options Granted
     2011     2010  

Risk-free interest rate

     2.6     2.5

Expected volatility

     27.4     42.1

Weighted average expected life in years

     7.4        4.5   

Dividend yield

     3.7     3.5
Employee Stock [Member]
 
Assumption For Fair Value Of Options Granted
     Three and Nine Months Ended
September 30,
 
     2011     2010  

Risk-free interest rate

     0.04     0.20

Expected volatility

     25.0     34.0

Weighted average expected life in years

     1.0        1.0   

Dividend yield

     3.7     3.5