Quarterly report pursuant to Section 13 or 15(d)

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

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EQUITY INVESMENTS (Equity Investment Income Statement Disclosure) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Equity Method Investments and Joint Ventures [Abstract]        
Gross revenue $ 384,043 $ 160,950 $ 1,451,580 $ 357,901
Net income (loss) $ 68,414 $ 2,101 $ 181,884 $ (109,651)