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RELATED PARTY TRANSACTIONS (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Jul. 31, 2019
Sep. 30, 2020
Jun. 30, 2020
Sep. 30, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Related Party Transaction [Line Items]              
Related Party Transaction, Revenues from Transactions with Related Party         $ 700 $ 1,100 $ 1,200
Related Party Transaction, Due from (to) Related Party         0    
Related Party Transaction, Expenses from Transactions with Related Party         1,300 1,500 1,700
Related Party Transaction, Purchases from Related Party           0 400
Equity Method Investment, Ownership Percentage 64.30% 21.40%          
Transfer from Investments       $ 14,300 0 0 14,268
Payment of interest on redeemable noncontrolling interest     $ 16,000        
Payment related to redeemable noncontrolling interest agreement $ 30,700 $ 30,700 $ 16,000   $ 0 $ 71,722 $ 0
Noncontrolling Interest, Ownership Percentage by Parent 64.30%            
RDIF [Member]              
Related Party Transaction [Line Items]              
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 35.70%            
Equity Method Investment, Ownership Percentage 35.70%