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STORAGE PROPERTIES - Summary (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
STORAGE FACILITIES |  |  |
Storage properties | $ 7,367,613 | $ 7,295,778 |
Less: Accumulated depreciation | (1,416,377) | (1,247,775) |
Storage properties, net | 5,951,236 | 6,048,003 | $ 6,097,670
Land |  |  |
STORAGE FACILITIES |  |  |
Storage properties | 1,594,742 | 1,588,138 |
Buildings and improvements |  |  |
STORAGE FACILITIES |  |  |
Storage properties | 5,517,544 | 5,483,506 |
Equipment |  |  |
STORAGE FACILITIES |  |  |
Storage properties | 144,372 | 144,605 |
Construction in progress |  |  |
STORAGE FACILITIES |  |  |
Storage properties | 69,010 | 37,584 |
Right-of-use assets - finance leases |  |  |
STORAGE FACILITIES |  |  |
Storage properties | $ 41,945 | $ 41,945 |

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- Definition Amount of real estate investment property which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)(d)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 + Details
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- Definition Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)(d)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 + Details
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