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INVESTMENTS (Details) - USD ($) $ in Thousands	1 Months Ended		12 Months Ended
INVESTMENTS (Details) - USD ($) $ in Thousands	Nov. 30, 2016	Apr. 10, 2015	Dec. 31, 2019	Dec. 31, 2018	Dec. 04, 2018
Schedule of Investments [Line Items]
Long-term Debt.			$ 889,873	$ 929,901
MGM National Harbor Loan [Member]
Schedule of Investments [Line Items]
Long-term Debt.			52,099	50,066	$ 50,000
MGM National Harbor [Member]
Schedule of Investments [Line Items]
Payments to Acquire Investments	$ 35,000	$ 5,000
Other Income			$ 6,900	$ 7,000