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DISPOSITIONS AND HELD FOR SALE - Gain on Extinguishment of Debt (Details) - USD ($) $ in Thousands	1 Months Ended			12 Months Ended
	Dec. 31, 2020	Aug. 31, 2020	Jan. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Balance of Non-recourse Debt				$ 91,679	$ 163,476
Gain on Extinguishment of Debt				$ 32,521	$ 71,722
Hickory Point Mall | Malls | Forsyth, IL
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Balance of Non-recourse Debt		$ 27,446
Gain on Extinguishment of Debt		$ 15,446
Burnsville Center | Malls | Burnsville, MN
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Balance of Non-recourse Debt	$ 64,233
Gain on Extinguishment of Debt	$ 17,075
Acadiana Mall | Malls | Lafayette, LA
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Balance of Non-recourse Debt			$ 119,760
Gain on Extinguishment of Debt			61,795
Cary Towne Center | Malls | Cary, NC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Balance of Non-recourse Debt			43,716
Gain on Extinguishment of Debt			$ 9,927

X

- Definition

Amount represents the difference between the cash acquisition price of the debt and the net carrying amount of the debt at the time of its extinguishment (or deconsolidation of in-substance real estate when an entity defaults on its debt obligations).

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 230
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-Section 45
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-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

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