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Share-Based Compensation (Share-Based Compensation Expense) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Share-Based Payment Arrangement [Abstract] |  |  |
Share-based compensation cost capitalized | $ 4,100,000 | $ 3,900,000 | $ 0
Share-based Payment Arrangement, Expensed, Amount [Line Items] |  |  |
Share-based compensation expense | 56,703,000 | 59,865,000 | 33,490,000
Self-storage cost of operations |  |  |
Share-based Payment Arrangement, Expensed, Amount [Line Items] |  |  |
Share-based compensation expense | 17,950,000 | 20,544,000 | 14,904,000
Ancillary cost of operations |  |  |
Share-based Payment Arrangement, Expensed, Amount [Line Items] |  |  |
Share-based compensation expense | 888,000 | 1,561,000 | 0
General and administrative |  |  |
Share-based Payment Arrangement, Expensed, Amount [Line Items] |  |  |
Share-based compensation expense | $ 37,865,000 | $ 37,760,000 | $ 18,586,000

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Amount of cost capitalized for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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