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Investments in Unconsolidated Real Estate Entities (Investment In Shurgard) (Narrative) (Details) $ in Thousands | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2022 USD ($) shares | Sep. 30, 2021 USD ($) | Sep. 30, 2022 € / shares | Dec. 31, 2021 USD ($) shares
Schedule of Equity Method Investments [Line Items] |  |  |  |
Exchange rate translation (percentage) | 0.980 |  |  |
Distributions from cumulative equity in earnings of unconsolidated real estate entities | $ 134,460 | $ 59,251 |  |
Distributions in excess of cumulative equity in earnings from unconsolidated real estate entities | $ 13,670 | 8,765 |  |
Shurgard |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Common stock owned of Shurgard (in shares) | shares | 31,268,459 |  |  | 31,268,459
Ownership interest (percentage) | 35.00% |  |  |
Closing price per share (in Euros per share) | € / shares |  |  | € 41.60 |
Market value | $ 1,300,000 |  |  |
License fees received | 2,600 | 2,600 |  |
Distributions from cumulative equity in earnings of unconsolidated real estate entities | 37,800 | 21,500 |  |
Distributions in excess of cumulative equity in earnings from unconsolidated real estate entities | 13,700 | 8,800 |  |
Basis differential | 65,700 |  |  | $ 74,700
Amortization of basis differential | $ 9,000 | $ 7,300 |  |

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