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Stock-Based Awards (Tables)
 9 Months Ended
Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of Options and Restricted Stock Activity

A summary of options and restricted stock activity is as follows:

 

     Options      Weighted
Average
Exercise Price
of Options		      Restricted
Stock
Awards		  

Balance at January 1, 2015

      5,330,070       $ 1.61         1,513,939   

Granted

      —        $ —          886,413   

Exercised/vested

      (3,742,258 )     $ 1.19         (703,917 ) 

Forfeitures

      —        $ —          (25,578 ) 
  

 

 

     

 

 

     

 

 

  

Balance at September 30, 2015

      1,587,812       $ 2.58         1,670,857   
  

 

 

     

 

 

     

 

 

  
Summary of Stock-Based Compensation Expense

A summary of stock-based compensation expense is as follows:

 

Three Months Ended September 30,      Nine Months Ended September 30,  
2015      2014      2015      2014  
$ 2,926       $ 2,077       $ 7,878       $ 6,122   

 

 

     

 

 

     

 

 

     

 

 
Summary of Unrecognized Stock-Based Compensation Expense and Average Remaining Vesting Period

A summary of unrecognized stock-based compensation expense and average remaining vesting period is as follows:

 

     September 30, 2015  
     Unrecognized Stock-Based
Compensation		      Average
Remaining
Vesting Period		  

Employees and directors option awards

    $ 152         1.12   

Employees and directors restricted stock awards

    $ 20,001         1.83