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MORTGAGE AND OTHER INDEBTEDNESS, NET - Dispositions (Details) - USD ($)	1 Months Ended		12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2017
Debt Instrument [Line Items]
Gain on extinguishment of debt			$ 71,722,000	$ 30,927,000
Proceeds from sale of real estate	$ 53,402,000	$ 112,076,000
Cary Towne Center
Debt Instrument [Line Items]
Proceeds from sale of real estate			31,500,000
Mortgages
Debt Instrument [Line Items]
Balance of Non-recourse Debt			163,476,000
Gain on extinguishment of debt			$ 71,722,000
Mortgages | Acadiana Mall
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage			5.67%
Balance of Non-recourse Debt			$ 119,760,000
Gain on extinguishment of debt			$ 61,795,000
Mortgages | Cary Towne Center
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage			4.00%
Balance of Non-recourse Debt			$ 43,716,000
Gain on extinguishment of debt			$ 9,927,000

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