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STORAGE PROPERTIES - Summary (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
STORAGE FACILITIES |  |
Storage properties | $ 5,536,376 | $ 5,489,754
Less: Accumulated depreciation | (1,026,337) | (983,940)
Storage properties, net (including VIE assets of $132,927 and $119,345, respectively) | 4,510,039 | 4,505,814
Land |  |
STORAGE FACILITIES |  |
Storage properties | 1,113,737 | 1,093,503
Buildings and improvements |  |
STORAGE FACILITIES |  |
Storage properties | 4,197,607 | 4,122,995
Equipment |  |
STORAGE FACILITIES |  |
Storage properties | 123,199 | 123,044
Construction in progress |  |
STORAGE FACILITIES |  |
Storage properties | 60,419 | 108,316
Right-of-use assets - finance leases |  |
STORAGE FACILITIES |  |
Storage properties | $ 41,414 | $ 41,896

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- Definition The cumulative amount of depreciation for real estate property held for investment purposes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(3)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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