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Investments in Unconsolidated Real Estate Joint Ventures (Narrative) (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Mar. 31, 2021 | Feb. 28, 2021 | Jan. 31, 2021 | Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Differences in basis | $ 3,400 |  |  | $ 3,400 |  | $ 3,600
Unconsolidated Properties [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Gain (loss) on asset sale |  |  |  | $ 503 | $ 0 |
Galveston/Houston [Member] | Mortgages [Member] | Unconsolidated Properties [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Debt Instrument, Unused Borrowing Capacity, Amount |  | $ 64,500 | $ 80,000 |  |  |
Basis spread on variable rate |  | 1.85% | 1.65% |  |  |
Les Factoreries St. Sauveur Property [Member] | Unconsolidated Properties [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Net proceeds from sale of assets | 9,400 |  |  |  |  |
Our Share of Proceeds From Sale Of Other Real Estate | 4,700 |  |  |  |  |
Gain (loss) on asset sale | (3,700) |  |  |  |  |
Foreign currency loss | $ (3,600) |  |  |  |  |

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