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GOODWILL (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
item
Dec. 31, 2019
USD ($)
GOODWILL    
Number of Reporting Units | item 1  
Goodwill [Roll Forward]    
Impairment expense   $ (74,091)
Net goodwill, Closing balance $ 0