INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES - Summary of Results of Operations of Real Estate Ventures with Interests (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Total revenue	$ 534,852	$ 580,417	$ 544,345
Operating expenses	(424,027)	(468,007)	(493,608)
Interest expense, net	(73,911)	(81,512)	(78,199)
Depreciation and amortization	(188,283)	(210,005)	(176,000)
Provision for impairment	0	0	(71,707)
Loss on early extinguishment of debt	0	0	(105)
Net income	307,326	34,529	135,472
Equity in loss of Real Estate Ventures	(18,584)	(9,922)	(15,231)
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule of Equity Method Investments [Line Items]
Total revenue	150,276	132,358	165,326
Operating expenses	(85,812)	(71,784)	(82,035)
Interest expense, net	(22,661)	(21,908)	(29,774)
Depreciation and amortization	(70,805)	(53,331)	(53,826)
Provision for impairment	0	(5,664)	(20,832)
Loss on early extinguishment of debt	0	(1,231)	(1,385)
Net income	(29,002)	(21,560)	(22,526)
Company's share of net loss	(18,540)	(9,865)	(11,924)
Other-than-temporary impairment	0	0	(4,076)
Basis adjustments and other	(44)	(57)	769
Equity in loss of Real Estate Ventures	$ (18,584)	$ (9,922)	$ (15,231)