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Fair Value Measurements - Long-Lived Assets Measured at Fair Value (Details) | 3 Months Ended | 6 Months Ended
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Jun. 30, 2022 USD ($) | Jun. 30, 2022 USD ($) | Jun. 30, 2021 USD ($) mall
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Fair Value |  |  | $ 38,500,000
Loss on impairment | $ 252,000 | $ 252,000 | $ 57,182,000
Number of malls with impairment | mall |  |  | 3
Malls |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Fair Value |  |  | $ 38,500,000
Loss on impairment |  |  | 57,182,000
Significant Unobservable Inputs (Level 3) |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Fair Value |  |  | 38,500,000
Greenbrier Mall |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Fair Value | 0 | 0 |
Outparcel at Pavilion at Port Orange |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Proceeds from sales of real estate assets | 1,660,000 | 1,660,000 |
Loss from sales of real estate assets | $ 252,000 | $ 252,000 |
Eastland Mall | Malls |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Fair Value |  |  | 10,700,000
Loss on impairment |  |  | $ 13,243,000
Eastland Mall | Malls | Measurement Input, Expected Term |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Holding period |  |  | 9 years
Eastland Mall | Malls | Cap Rate (as a percent) |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Fair value measurement input (as a percent) |  |  | 14.0
Eastland Mall | Malls | Discount Rate (as a percent) |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Fair value measurement input (as a percent) |  |  | 15.0
Old Hickory Mall | Malls |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Fair Value |  |  | $ 12,400,000
Loss on impairment |  |  | $ 20,149,000
Old Hickory Mall | Malls | Measurement Input, Expected Term |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Holding period |  |  | 9 years
Old Hickory Mall | Malls | Cap Rate (as a percent) |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Fair value measurement input (as a percent) |  |  | 13.0
Old Hickory Mall | Malls | Discount Rate (as a percent) |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Fair value measurement input (as a percent) |  |  | 14.0
Stroud Mall | Malls |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Fair Value |  |  | $ 15,400,000
Loss on impairment |  |  | $ 23,790,000
Stroud Mall | Malls | Measurement Input, Expected Term |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Holding period |  |  | 9 years
Stroud Mall | Malls | Cap Rate (as a percent) |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Fair value measurement input (as a percent) |  |  | 11.75
Stroud Mall | Malls | Discount Rate (as a percent) |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Fair value measurement input (as a percent) |  |  | 12.5
Asheville Mall and Park Plaza |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |
Fair Value |  |  | $ 0

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Amount of gain (loss) from the difference between the sale price or salvage price and the book value of an asset that was sold or retired, and gain (loss) from the write down of assets from their carrying value to fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 + Details
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