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ACQUISITIONS - Level 3 Assumptions Utilized in Determining Value of Acquired Assets (Details) - Valuation, Income Approach | 12 Months Ended
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Dec. 31, 2021 $ / ft² | Dec. 31, 2020 $ / ft² | Dec. 31, 2019 $ / ft²
Net rental rate per square foot – Anchors | Minimum | Real Estate Asset Acquisition |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 22.50 | 11.00
Net rental rate per square foot – Anchors | Maximum | Real Estate Asset Acquisition |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 27.50 | 12.96
Net rental rate per square foot – Anchors | Retail Properties of America, Inc. | Minimum |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input | 4.00 |  |
Net rental rate per square foot – Anchors | Retail Properties of America, Inc. | Maximum |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input | 45.00 |  |
Net rental rate per square foot – Small Shops | Minimum | Real Estate Asset Acquisition |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input | 31.50 | 15.00 | 6.33
Net rental rate per square foot – Small Shops | Maximum | Real Estate Asset Acquisition |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input | 45.00 | 65.00 | 32.00
Net rental rate per square foot – Small Shops | Retail Properties of America, Inc. | Minimum |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input | 7.00 |  |
Net rental rate per square foot – Small Shops | Retail Properties of America, Inc. | Maximum |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input | 140.00 |  |
Capitalization rate | Minimum | Real Estate Asset Acquisition |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input | 0.090 | 0.090 |
Capitalization rate | Maximum | Real Estate Asset Acquisition |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  |  | 0.090
Capitalization rate | Retail Properties of America, Inc. | Minimum |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input | 0.0525 |  |
Capitalization rate | Retail Properties of America, Inc. | Maximum |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input | 0.0900 |  |

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