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AFFILIATE AND RELATED PARTY TRANSACTIONS - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Related Party Transaction [Line Items]        
Related party expense $ 4,165 $ 520 $ 6,166 $ 3,162