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Stock Option and Incentive Plans
 3 Months Ended
Mar. 31, 2012
Stock Option and Incentive Plans  
Stock Option and Incentive Plans

12.   Stock Option and Incentive Plans

        The following summarizes the transactions of the Company's stock option and incentive plans for the three months ended March 31, 2012:

 
   Stock Options   Weighted
Average
Exercise
Price 		  Weighted
Average
Remaining
Contractual
Life (years) 		 

Unexercised options outstanding—January 1, 2012

     5.1   $ 68.18        

Options granted

     0.0     107.63        

Options exercised

     (0.3 )   51.76        

Options forfeited

     (0.0 )   116.35        
                   

Unexercised options outstanding—March 31, 2012

     4.8     69.19     4.3  
                   

Exercisable at March 31, 2012

     2.7     62.91     3.6  

        The Company's Net income (controlling interest) for the three months ended March 31, 2011 includes compensation expense of $3.8 million (net of income tax benefits of $2.3 million) related to the Company's Stock Option and Incentive, Executive Incentive, Long-Term Equity Interests and Deferred Compensation Plans as compared to compensation expense of $5.0 million (net of income tax benefits of $3.1 million) for the three months ended March 31, 2012. As of March 31, 2012, the Company expects to recognize compensation expense related to these share-based compensation arrangements of $71.8 million over a weighted average period of approximately three years (assuming no forfeitures). As of March 31, 2012, no outstanding options have expiration dates prior to the end of 2012.