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STOCK-BASED COMPENSATION (Tables)
6 Months Ended
Jun. 30, 2011
STOCK-BASED COMPENSATION [Abstract]  
Schedule of share-based compensation, stock options, activity
A summary of activity for the Company's stock options as of and for the six months ended June 30, 2011 is presented below:
 
   
Shares
  
Weighted
Average
Exercise
Price
 
Weighted
Average
Remaining
Contractual
Term
 
Aggregate
Intrinsic
Value
(In thousands)
 
             
Outstanding at beginning of period
  1,438,979  $24.21      
Granted
  8,654   23.11      
Exercised
  (228,160)  12.68      
Forfeited
  (79,463)  26.36      
Outstanding at end of period
  1,140,010  $26.36 
 2.46 years
 $1,633 
Vested or expected to vest at end of period
  1,127,526  $26.45 
 2.44 years
 $1,585 
Exercisable at end of period
  946,474  $27.98 
 2.15 years
 $1,155 
 
Schedule of non-vested stock options activity
A summary of changes in unvested stock options and related information for the six months ended June 30, 2011 is presented below:
 
Unvested Options
 
Shares
  
Weighted Average
Grant Date Fair Value
(per share)
 
        
Unvested at January 1, 2011
  416,851  $5.04 
Granted
  8,654   13.21 
Vested
  (225,582)  5.60 
Forfeited
  (6,387)  4.69 
          
Unvested at June 30, 2011
  193,536  $4.76 
 
Schedule of share-based payment award, stock options, valuation assumptions
The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model with the following assumptions:
 
   Three Months Ended
June 30,
  Six Months Ended
June 30,
 
   
2011(5)
  
2010(5)
  
2011
  
2010(5)
 
              
Expected term(1)  N/A   N/A   4 years   N/A 
Expected volatility(2)
  N/A   N/A   78.1%   N/A 
Expected dividend yield(3)
  N/A   N/A   0.2%   N/A 
Risk-free interest rate(4)
  N/A   N/A   1.6%   N/A 
_______________________
 
(1)
The expected term (estimated period of time outstanding) of stock options granted was estimated using the historical exercise behavior of employees.
 
(2)
The expected volatility was based on historical volatility for a period equal to the stock option's expected term.
 
(3)
The expected dividend yield is based on the Company's prevailing dividend rate at the time of grant.
 
(4)
The risk-free rate is based on the U.S. Treasury strips in effect at the time of grant equal to the stock option's expected term.
 
(5)
The Company did not issue any stock options during the three months ended June 30, 2011 and the six months ended June 30, 2010.
 
Schedule of share-based compensation arrangement by share-based payment award, options, grants in period, grant date intrinsic value
During the three and six months ended June 30, 2011 and 2010, information related to stock options is presented as follows:
 
   
Three Months Ended
June 30,
  
Six Months Ended
June 30,
 
   
2011
  
2010
  
2011
  
2010
 
              
Weighted average grant date fair value of stock  options granted during the period(1)
 $-  $-  $13.21  $- 
Total intrinsic value of options exercised (in thousands)
 $855  $359  $2,052  $636 
Total fair value of options vested (in thousands)
 $119  $404  $1,263  $2,076 
____________________
(1)
The Company did not issue any stock options during the three months ended June 30, 2011 and the six months ended June 30, 2010.
 
Schedule of share-based compensation, restricted stock units award activity
A summary of the activity for restricted stock awards as of June 30, 2011, including changes during the six months then ended, is presented below:
 
   
Shares
  
Weighted
Average
Price
 
        
Outstanding unvested at beginning of period
  1,789,498  $17.09 
Granted
  487,934   22.67 
Vested
  (114,318)  30.14 
Forfeited
  (138,594)  18.01 
Outstanding unvested at end of period
  2,024,520  $17.64