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Stock-based Compensation
9 Months Ended
Sep. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Stock-based Compensation

13. Stock-based Compensation

The Company measures its stock-based compensation costs based on the grant date fair value of the awards and recognizes these costs in the financial statements over the requisite service period.

A summary of information with respect to stock-based compensation is as follows:

 

     Three Months Ended
September 30,
     Nine Months Ended
September 30,
 
     2013      2012      2013      2012  

Total stock-based compensation expense included in operating income

   $ 302       $ 1,281       $ 2,775       $ 4,081   

Income tax benefit related to stock-based compensation included in net income

   $ 118       $ 495       $ 1,087       $ 1,576   

Restricted Stock Units

Restricted stock unit activity for the nine months ended September 30, 2013:

 

     Number of
Restricted
Stock Units
    Weighted-
Average
Grant-date
Fair  Value
 

Outstanding on December 31, 2012

     361,778      $ 23.43   

Granted

     174,508        14.01   

Vested and converted to common stock

     (142,487     24.15   

Forfeited

     (97,876     17.69   
  

 

 

   

Outstanding on September 30, 2013

     295,923        19.43   
  

 

 

   

As of September 30, 2013, there was $2.5 million of pre-tax unrecognized compensation expense related to unvested restricted stock units, which is expected to be recognized over a weighted average of 1.7 years.

 

Performance Stock Units

Performance stock unit activity for the nine months ended September 30, 2013:

 

     Number of
Peformance
Stock Units
    Weighted-
Average
Grant-date
Fair Value
 

Outstanding on December 31, 2012

     80,000      $ 23.75   

Granted

     63,895        13.89   

Vested and converted to common stock

     —          —     

Forfeited

     (82,574     19.07   
  

 

 

   

Outstanding on September 30, 2013

     61,321        19.77   
  

 

 

   

As of September 30, 2013, there was $0.4 million of pre-tax unrecognized compensation expense related to unvested performance stock units, which is expected to be recognized over a weighted average of 2.1 years.