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Share-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2012
Share-Based Compensation [Abstract]  
Summary of share-based compensation expense

The following table summarizes share-based compensation expense:

 

                                 
    Three months ended
September 30,
    Nine months ended
September 30,
 
    2012     2011     2012     2011  
          (in thousands)        

Restricted stock/performance-based restricted stock (“PBRS”)

  $ 890     $ 794     $ 2,610     $ 2,409  

Performance unit incentive plan (“PUP”)

    548       86       1,220       345  

Stock options

    148       146       450       476  

Restricted stock units/PBRS units

    84       (35     244       54  
   

 

 

   

 

 

   

 

 

   

 

 

 

Total share-based compensation before income tax benefit

    1,670       991       4,524       3,284  

Income tax benefit

    (571     (358     (1,606     (1,163
   

 

 

   

 

 

   

 

 

   

 

 

 

Total share-based compensation, net of income tax benefit

  $ 1,099     $ 633     $ 2,918     $ 2,121  
   

 

 

   

 

 

   

 

 

   

 

 

 
Summary of restricted stock and PBRS activity

Restricted Stock and PBRS. The following table summarizes restricted stock and PBRS activity:

 

                                 
    Restricted Stock     PBRS  
    Shares     Weighted-Average
Grant Date

Fair Value
    Shares     Weighted-Average
Grant Date

Fair Value
 

Balance at January 1, 2012

    572,022     $ 20.36       416     $ 15.36  

Granted

    166,750       20.46       —         —    

Vested

    (197,571     17.97       (416     15.36  

Forfeited

    (4,150     24.80       —         —    
   

 

 

           

 

 

         

Balance at September 30, 2012

    537,051       21.23       —         —    
   

 

 

           

 

 

         
Summary of liability-based award activity

Liability-Based Awards. The following table summarizes the liability-based award activity:

 

                                                 
    Restricted Stock Units     PBRS Units     PUP Awards  
    Units     Weighted-Average
Grant Date

Fair Value
    Units     Weighted-Average
Grant Date

Fair Value
    Units     Weighted-Average
Grant Date

Fair Value
 

Balance at January 1, 2012

    38,600     $ 19.07       1,956     $ 15.36       95,500     $ 23.02  

Granted

    15,850       20.57       —         —         115,100       20.60  

Vested

    (13,100     15.36       (1,956     15.36       —         —    
   

 

 

           

 

 

           

 

 

         

Balance at September 30, 2012

    41,350       20.82       —         —         210,600       21.70  
   

 

 

           

 

 

           

 

 

         
Summary of stock option activity

Stock Options. The following table summarizes stock option activity:

 

                         
    Shares     Weighted-
Average
Exercise  Price
    Options
Exercisable
 

Options outstanding at January 1, 2012

    584,201     $ 23.32       396,688  

Exercised

    (4,562     19.57          

Forfeited or expired

    (191,881     26.18          
   

 

 

                 

Options outstanding at September 30, 2012

    387,758       21.95       293,905