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Fair Value Measurements - Narrative (Details) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) property | Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Number of retail properties impaired | property |  |  |  | 1 |
Provision for asset impairment | $ 0 | $ 0 | $ 0 | $ 9,002,000 |
Mortgages payable | Weighted Average Effective Market Rate |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair value measurement input (percent) | 0.0443 |  | 0.0443 |  | 0.0425
Line of Credit | Discount Rate |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair value measurement input (percent) | 0.0216 |  | 0.0216 |  | 0.0136
Fair Value, Measurements, Nonrecurring | Level 3 |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair value measurements | $ 0 |  | $ 0 |  |
Fair Value, Measurements, Recurring | Level 3 |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair value measurements |  | $ 0 |  | $ 0 |

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