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MORTGAGE AND OTHER INDEBTEDNESS, NET - Scheduled Principal Payments (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) loan	Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
2021	$ 560,128
2022	407,638
2023	1,502,276
2024	343,571
2025	38,355
Thereafter	764,325
Total	3,616,293
Mortgage and other indebtedness, net	1,184,831	$ 3,527,015
Liabilities subject to compromise	2,489,676
Mortgages
Debt Instrument [Line Items]
Mortgage and other indebtedness, net	3,677,940
Operating Property Loan
Debt Instrument [Line Items]
2021	$ 505,735
Number of operating property loans (loan) | loan	9
Operating Property Loan | Mortgages
Debt Instrument [Line Items]
Mortgage and other indebtedness, net	$ 61,647

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