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Mortgage Notes Payable - Footnotes (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended |
--- | --- | --- | --- | ---
Mar. 25, 2021 | Jan. 22, 2021 | Mar. 31, 2021 | Dec. 31, 2020
Mortgage loans payable on real estate |  |  |  |
Unamortized deferred finance costs |  |  | $ 16,325 | $ 14,085
London Interbank Offered Rate (LIBOR) [Member] |  |  |  |
Mortgage loans payable on real estate |  |  |  |
Variable interest rate spread (as a percent) |  |  | 1.65% |
Freehold Raceway Mall |  |  |  |
Mortgage loans payable on real estate |  |  |  |
Percentage of loan assumed by third party |  |  | 49.90% |
Effective interest rate (as a percent) |  |  | 3.94% |
Green Acres Commons |  |  |  |
Mortgage loans payable on real estate |  |  |  |
Extension term | 2 years |  |  |
Repayments of debt | $ 4,680 |  |  |
Effective interest rate (as a percent) |  |  | 3.13% |
Green Acres Commons | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |
Mortgage loans payable on real estate |  |  |  |
Variable rate | 2.75% |  |  |
Green Acres Mall |  |  |  |
Mortgage loans payable on real estate |  |  |  |
Extension term |  | 1 year |  |
Repayments of debt |  | $ 9 |  |
Effective interest rate (as a percent) |  |  | 3.94% |
Santa Monica Place |  |  |  |
Mortgage loans payable on real estate |  |  |  |
Variable interest rate spread (as a percent) |  |  | 1.48% |
Effective interest rate (as a percent) |  |  | 1.83% | 1.88%
Santa Monica Place | Maximum | Cap |  |  |  |
Mortgage loans payable on real estate |  |  |  |
Variable interest rate spread (as a percent) |  |  | 4.00% |

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