Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Tables)

v2.4.0.6
Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Employee stock-based compensation expense

Employee stock-based compensation expense was as follows:

 

                                 
    Three Months Ended
June 30,
    Six Months Ended
June 30,
 
    2012     2011     2012     2011  
         

Employee stock-based compensation expense

  $ 1,135     $ 829     $ 1,930     $ 1,645  

Tax effect on employee stock-based compensation expense

    (456     (330     (777     (661
   

 

 

   

 

 

   

 

 

   

 

 

 

Net effect on income

  $ 679     $ 499     $ 1,153     $ 984  
   

 

 

   

 

 

   

 

 

   

 

 

 
Weighted average assumptions used to value options granted

The following weighted average assumptions were used to value options granted during the periods indicated:

 

                                 
    Three Months Ended
June 30,
    Six Months Ended
June 30,
 
    2012     2011     2012     2011  
         

Grant date fair value of options

  $ 4.97     $ —       $ 4.91     $ 5.26  

Volatility

    39.7     —         39.7     39.3

Risk-free interest rate

    1.2     —         1.2     2.5

Dividend yield

    0.0     —         0.0     0.0

Expected term (in years)

    6.0       —         6.0       6.0  
Summary of option activity

The following table summarizes option activity under the 2004 Plan, 2010 Plan and 2012 Plan:

 

                                 
    Shares     Weighted-
Average
Exercise
Price
    Weighted-
Average
Remaining
Contractual
Life (Years)
    Aggregate
Intrinsic
Value
 
         

Outstanding as of December 31, 2011

    4,863,718     $ 8.19                  

Granted

    149,652       12.45                  

Exercised

    (124,956     7.59                  

Forfeited

    (2,000     9.70                  
   

 

 

                         

Outstanding as of March 31, 2012

    4,886,414       8.34       6.7     $ 20,544  

Granted

    589,263       12.55                  

Exercised

    (99,837     6.18                  

Forfeited

    (1,800     9.00                  
   

 

 

                         

Outstanding as of June 30, 2012

    5,374,040       8.84       6.8       17,737  
   

 

 

                         
         

Options exercisable

    2,977,757       7.43       5.4       13,769  
   

 

 

                         
Restricted Stock [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of unvested stock awards activity

The following is a summary of the activity for unvested restricted stock awards granted under all Plans:

 

                 
    Number
of Shares
    Weighted-
Average
Grant
Date Fair
Value per
Share
 
     

Balance at December 31, 2011

    73,820     $ 12.26  

Granted

    155,383       12.44  

Vested

    (21,235     12.55  

Expired/cancelled

    (1,064     12.45  

Forfeited

    (104     12.55  
   

 

 

         

Balance at March 31, 2012

    206,800       12.36  

Granted

    559,551       12.51  

Forfeited

    (381     12.49  
   

 

 

         

Balance at June 30, 2012

    765,970     $ 12.47