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STOCK-BASED COMPENSATION (Tables)
 12 Months Ended
Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Total Stock-Based Compensation Expense Recognized

Total compensation expense recognized for the years ended December 31, 2013, 2012 and 2011 was as follows:

 

     December 31,  
     2013      2012      2011  
     (In thousands)  

Stock options

    $ 4,321       $ 3,984       $ 3,845   

Restricted stock and restricted stock units

      12,326         6,880         11,939   

Performance and deferred stock units

      4,453         4,505         2,041   
  

 

 

     

 

 

     

 

 

  

Total

    $ 21,100       $ 15,369       $ 17,825   
  

 

 

     

 

 

     

 

 

  

 

 
Total Gross Unrecognized Estimated Compensation Expense and Expected Weighted-Average Periods

The components of the total gross unrecognized estimated compensation expense and their expected remaining weighted-average periods for expense recognition are as follows (amounts in millions; periods in years):

 

     Amount      Weighted-
Average
Period		  

Stock options

    $ 4.7         1.8   

Restricted stock and restricted stock units

    $ 23.3         3.0   

Performance shares

    $ 5.2         1.6   
Weighted Average Assumptions

The fair value of each option grant was estimated with the following weighted-average assumptions:

 

     Year Ended December 31,  
     2013     2012     2011  

Risk-free interest rate

      0.68 %      0.77 %      2.26 % 

Expected volatility

      56 %      59 %      41 % 

Expected life of the option in years

      4.60        4.60        4.60   

Expected dividend yield

      0.0 %      0.0 %      0.0 % 
Activity for Stock Option

The following table summarizes activity for our stock options for the year ended December 31, 2013 (share data in thousands):

 

     Number
of Option
Shares		     Weighted-
Average
Exercise
Price		      Weighted-
Average
Remaining
Contractual
Term		      Aggregate
Intrinsic
Value
(in millions)		  

Outstanding at beginning of period

      2,728      $ 12.24         

Granted

      1,230        10.39         

Exercised

      (68 )      2.51         

Cancelled/expired/forfeited

      (128 )      13.37         
  

 

 

    

 

 

     

 

 

     

 

 

  

Outstanding at end of period(1)

      3,762      $ 11.78         4.2 Years       $ 3.5   
  

 

 

    

 

 

     

 

 

     

 

 

  

Exercisable at end of period

      2,040      $ 11.28         2.9 Years       $ 3.4   
  

 

 

    

 

 

     

 

 

     

 

 

  

 

(1) Of the remaining shares subject to outstanding options, we expect approximately 1.7 million shares to vest at a weighted-average exercise price of $12.40.
Nonvested Restricted Stock, Restricted Stock Units and Changes

Nonvested restricted stock and restricted stock units and changes during the year ended December 31, 2013 were as follows (share data in thousands):

 

     Number
of
Shares		     Weighted-
Average
Grant Date
Fair Value		  

Nonvested at beginning of period

      918      $ 14.80   

Granted

      3,484        8.40   

Vested

      (461 )      14.05   

Cancelled/forfeited

      (174 )      10.29   
  

 

 

    

 

 

  

Nonvested at end of period

      3,767      $ 9.18   
  

 

 

    

 

 

  

 
Nonvested Performance Shares and Performance Unit Awards and Changes

Nonvested performance share awards and changes during the year ended December 31, 2013 were as follows (share data in thousands):

 

     Number
of
Shares		     Weighted-
Average
Grant Date
Fair Value		  

Nonvested at beginning of period

      528      $ 29.19   

Granted

      664        10.42   

Vested

      —         —    

Cancelled/forfeited

      (24 )      15.66   
  

 

 

    

 

 

  

Nonvested at end of period

      1,168      $ 13.70