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Financial Instruments and Fair Value Measurements - Items Measured at Fair Value on a Non-Recurring Basis (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) property
Provisions for impairment |  |  |
Less: total provisions for impairment | $ (25,860) | $ (38,967) | $ (147,232)
Buildings and improvements | 29,707,751 | 25,155,178 |
Properties impaired 2022 |  |  |
Provisions for impairment |  |  |
Less: total provisions for impairment | (25,900) | (39,000) | (147,200)
Carrying value prior to impairment | 140,900 | 169,200 | 260,800
Carrying value after impairment | $ 115,000 | $ 130,200 | $ 113,600
COVID Related Properties |  |  |
Provisions for impairment |  |  |
Number of impaired properties held for investment | property |  |  | 38
Less: total provisions for impairment |  |  | $ (105,000)

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- Definition Investment Building and Building Improvements, after Impairment + References No definition available. + Details
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- Definition Investment Building and Building Improvements, Prior To Impairment + References No definition available. + Details
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- Definition The charge against earnings in the period to reduce the carrying amount of real property to fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230 + Details
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- Definition Aggregate of the carrying amounts as of the balance sheet date of investments in building and building improvements. + 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 https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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- References No definition available. + Details
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- Details
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