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Investments in Real Estate Partnerships - Balance Sheet Summarized Financial Information (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Investments in real estate, net |  | $ 2,817,713 |  | $ 2,917,415 |
Acquired lease intangible assets, net |  | 32,607 |  | 40,549 |
Other assets |  | 216,907 |  | 200,920 |
Total assets |  | 10,936,904 |  | 11,132,253 |
Notes payable |  | 1,557,043 |  | 1,577,467 |
Acquired lease intangible liabilities, net |  | 33,223 |  | 44,387 |
Other liabilities |  | 97,321 |  | 96,388 |
Capital - Regency |  | 73,235 |  | 76,613 |
Capital - Third parties |  | 5,984,912 |  | 6,213,348 |
Total liabilities and equity |  | 10,936,904 |  | 11,132,253 |
Investments in real estate partnerships (note 4) |  | 467,155 |  | 469,522 |
US Regency Retail 1, LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Investments in real estate partnerships (note 4) |  | 0 | [1] | 0 | [2]
Other Liabilities [Member] | US Regency Retail 1, LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Investments in real estate partnerships (note 4) | [3] | 4,401 |  | 3,943 |
Basis Difference [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity |  | (47,119) |  | (43,296) |
Total Assets [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Total assets |  | 3,067,227 |  | 3,158,884 |
Total Assets [Member] | US Regency Retail 1, LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Total assets |  | 85,006 | [1] | 87,231 | [2]
Regency [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Capital - Regency |  | 509,873 |  | 508,875 |
Third Parties [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Capital - Third parties |  | 869,767 |  | 931,767 |
Total Liabilities and Capital [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Total liabilities and equity |  | $ 3,067,227 |  | $ 3,158,884 |
[1] | The USAA partnership has distributed proceeds from debt refinancing and real estate sales in excess of Regency’s carrying value of its investment, resulting in a negative investment balance of $4.4 million, which is recorded within Accounts Payable and other liabilities in the Consolidated Balance Sheets.
[2] | The USAA partnership has distributed proceeds from debt refinancing and real estate sales in excess of Regency’s carrying value of its investment resulting in a negative investment balance of $3.9 million, which is recorded within Accounts Payable and other liabilities in the Consolidated Balance Sheets.
[3] | The USAA partnership has distributed proceeds from debt refinancing and real estate sales in excess of Regency's carrying value of its investment resulting in a negative investment balance, which is recorded within Accounts payable and other liabilities in the Consolidated Balance Sheets.

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