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FAIR VALUE OF FINANCIAL INSTRUMENTS - Schedule of Fair Value of Financial Instruments (Details) - Level 2 - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair Value $ 293,543 $ 306,543
Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair Value $ 297,032 $ 307,443