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Mortgage Notes Payable - Footnotes (Details) - USD ($) $ in Thousands |  |  |  |  |  |  |  | 9 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 26, 2022 | Jul. 01, 2022 | May 06, 2022 | Apr. 29, 2022 | Sep. 15, 2021 | Mar. 25, 2021 | Jan. 22, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |
Unamortized deferred finance costs |  |  |  |  |  |  |  | $ 11,368 |  | $ 11,946
Proceeds from mortgages, bank and other notes payable |  |  |  |  |  |  |  | $ 130,000 | $ 495,000 |
Chandler Fashion Center |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |
Interest in the loan assumed by a third party (as a percent) |  |  |  |  |  |  |  | 49.90% |  |
Freehold Raceway Mall |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |
Interest in the loan assumed by a third party (as a percent) |  |  |  |  |  |  |  | 49.90% |  |
Danbury Fair Mall |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |
Repayments of debt |  | $ 10,000 |  |  | $ 10,000 |  |  |  |  |
Interest rate on debt (as a percent) |  | 5.50% |  |  |  |  |  |  |  |
Fashion District Philadelphia |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |
Repayments of debt | $ 83,058 |  |  |  |  |  |  |  |  |
Green Acres Commons |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  | $ 4,680 |  |  |  |
Extension term (in years) |  |  |  |  |  | 2 years |  |  |  |
Green Acres Commons | LIBOR |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |
Variable interest rate spread (as a percent) |  |  |  |  |  | 2.75% |  |  |  |
Green Acres Mall |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  |  |  |  | $ 9,000 |  |  |
Extension term (in years) |  |  |  |  |  |  | 1 year |  |  |
Oaks, The |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |
Repayments of debt |  |  | $ 5,000 |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  | 5.25% |  |  |  |  |  |  |
Extension term (in years) |  |  | 2 years |  |  |  |  |  |  |
Pacific View |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |
Interest rate on debt (as a percent) |  |  |  | 5.29% |  |  |  |  |  |
Proceeds from mortgages, bank and other notes payable |  |  |  | $ 72,000 |  |  |  |  |  |
Santa Monica Place |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |
Extension term (in years) |  |  |  |  |  |  |  | 3 years |  |
Santa Monica Place | LIBOR |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |
Variable interest rate spread (as a percent) |  |  |  |  |  |  |  | 1.48% |  |
Interest rate cap (as a percent) |  |  |  |  |  |  |  | 4.00% |  |
Santa Monica Place | SOFR |  |  |  |  |  |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |  |  |  |  |  |
Variable interest rate spread (as a percent) |  |  |  |  |  |  |  | 1.58% |  |

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