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STOCK-BASED COMPENSATION (Tables)
 9 Months Ended
Sep. 30, 2015
STOCK-BASED COMPENSATION [Abstract]  
Employee and Non-employee Restricted Stock Plan
The following table provides certain information regarding the shares authorized and outstanding under the Restricted Stock Plan at September 30, 2015:

Number of shares authorized for grants
  
800,000
 
Number of shares granted
  
(862,349
)
Number of shares forfeited
  
133,139
 
Number of shares available for future grants
  
70,790
 
Weighted-average grant price of granted shares
 
$
28.21
 
Changes in Restricted Stock
Changes in restricted stock for the nine months ended September 30, 2015 were as follows:

  
Number of
Shares
  
Weighted Average
Grant Price
 
Non-vested at December 31, 2014
  
179,942
  
$
52.71
 
Granted
  
24,971
  
$
40.95
 
Forfeited
  
(10,118
)
 
$
57.66
 
Vested
  
(58,138
)
 
$
45.36
 
Non-vested at September 30, 2015
  
136,657
  
$
53.32