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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Carrying Amount [Member]    
Long-term Financial Liabilities [Abstract]    
Long-term Debt, Fair Value $ 105,571 $ 106,199
Estimated fair value [Member]    
Long-term Financial Liabilities [Abstract]    
Long-term Debt, Fair Value $ 127,704 $ 129,243