Quarterly report pursuant to Section 13 or 15(d)

EQUITY INVESTMENTS (Equity Investment Income Statement Disclosure) (Details)

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EQUITY INVESTMENTS (Equity Investment Income Statement Disclosure) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Schedule of Equity Method Investments [Line Items]        
Gross revenue $ 136,176 $ 341,746 $ 621,815 $ 1,226,658
Equity Method Investment, Nonconsolidated Investee or Group of Investees        
Schedule of Equity Method Investments [Line Items]        
Gross revenue 70,534 113,417 228,026 557,375
Net (loss) income $ 2,808 $ (35,730) $ (97,145) $ (15,046)