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FAIR VALUE MEASUREMENTS (Tables)
 3 Months Ended
Mar. 31, 2014
FAIR VALUE MEASUREMENTS [Abstract]  
Schedule of summarized assets and liabilities measured at fair value on recurring basis
The following table summarizes the assets and liabilities measured at fair value on a recurring basis as of December 31, 2013 (in thousands):

December 31, 2013:
 
Quoted
Prices
in Active
Markets for
Identical
Assets
(Level 1)
  
Significant
Other
Observable
Inputs
(Level 2)
  
Significant
Unobservable
Inputs
(Level 3)
  
Total
Fair Value
Measurements
 
Assets:
 
  
  
  
 
Derivatives  
 
$
—
  
$
—
  
$
—
  
$
—
 
 
                
Liabilities:
                
Derivatives  
 
$
—
  
$
59
  
$
—
  
$
59
 
Contingent liabilities  
  
—
   
—
   
4,903
   
4,903
 
 
 
$
—
  
$
59
  
$
4,903
  
$
4,962