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GOODWILL AND INTANGIBLE ASSETS - Narrative (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Goodwill [Line Items]      
Goodwill and asset impairment $ (8,659) $ 0 $ 0
Impairment charges 5,360    
Impairment charges 3,299    
Amortization of intangible assets $ 4,900 $ 5,900 $ 5,500
Weighted average cost of capital      
Goodwill [Line Items]      
Weighted average cost of capital 0.10