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RELATED PARTY TRANSACTIONS (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 31, 2019
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Related Party Transaction [Line Items]            
Related Party Transaction, Revenues from Transactions with Related Party   $ 200 $ 300 $ 500 $ 600  
Related Party Transaction, Due from (to) Related Party   100   100   $ 200
Related Party Transaction, Expenses from Transactions with Related Party   $ 300 $ 500 $ 800 1,000  
Equity Method Investment, Ownership Percentage   21.40%   21.40%    
Payment of interest on redeemable noncontrolling interest       $ (16,000) 0  
Payment related to redeemable noncontrolling interest agreement   $ 41,000   $ 41,000 $ 0  
Subsequent Event [Member]            
Related Party Transaction [Line Items]            
Equity Method Investment, Ownership Percentage 64.30%          
Payment related to redeemable noncontrolling interest agreement $ 30,700          
Subsequent Event [Member] | RDIF [Member]            
Related Party Transaction [Line Items]            
Equity Method Investment, Ownership Percentage 35.70%