Mortgage and Other Indebtedness, Net - Summary of 2020 Dispositions (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Debt Instrument [Line Items]
Gain on Extinguishment of Debt	$ 15,407	$ 15,407	$ 71,722
Hickory Point Mall \| Forsyth, IL
Debt Instrument [Line Items]
Balance of Non-recourse Debt	$ 27,446	27,446
Gain on Extinguishment of Debt		$ 15,407

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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