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FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)
12 Months Ended
Dec. 31, 2017
FAIR VALUE OF FINANCIAL INSTRUMENTS [Abstract]  
Fair value of long-term debt
In thousands
December 31,
 
 
2017
 
2016
 
Carrying amount
 
$
106,931
  
$
103,647
 
Estimated fair value
  
110,524
   
111,864