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Investments in Unconsolidated Real Estate Entities (Investment In Shurgard) (Narrative) (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 USD ($) shares | Dec. 31, 2021 USD ($) shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2022 € / shares
Schedule of Equity Method Investments [Line Items] |  |  |  |
Exchange rate translation (percentage) | 1.070 | 1.134 |  |
Distributions from cumulative equity in earnings of unconsolidated real estate entities | $ 134,769 | $ 150,488 | $ 72,098 |
Distributions in excess of cumulative equity in earnings from unconsolidated real estate entities | $ 13,670 | $ 19,518 | $ 24,658 |
Shurgard |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Common stock owned of Shurgard (in shares) | shares | 31,268,459 | 31,268,459 | 31,268,459 |
Ownership interest (percentage) | 35.00% | 35.00% | 35.00% |
Closing price per share (in Euros per share) | € / shares |  |  |  | € 42.85
Market value | $ 1,400,000 |  |  |
License fees received | 3,500 | $ 3,500 | $ 3,100 |
Distributions from cumulative equity in earnings of unconsolidated real estate entities | 37,800 | 41,500 | 34,900 |
Distributions in excess of cumulative equity in earnings from unconsolidated real estate entities | 13,700 | 19,500 | 24,700 |
Basis differential | 67,800 | 74,700 |  |
Amortization of basis differential | $ 6,900 | $ 8,400 | $ 5,800 |

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