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ASSET IMPAIRMENT (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Asset Impairment Charges [Abstract]      
Asset impairment $ 0 $ 9,917 $ 0
Unusual or Infrequent Item, or Both, Insurance Proceeds $ 1,600