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Schedule III Real Estate and Accumulated Depreciation [Schedule] (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Real estate investments: |  |  |  |
Balance at beginning of year |  | $ 15,246,658 | $ 14,704,237 | $ 14,338,895
Acquisitions | [1] | 223,735 | 272,342 | 44,086
Less: FMV of leases included in acquisitions |  | (2,050) | (1,505) |
Improvement and development |  | 546,237 | 469,661 | 506,775
Disposition of real estate assets | [2] | (7,962) | (198,077) | (185,519)
Balance at end of year |  | 16,006,618 | 15,246,658 | 14,704,237
Accumulated depreciation: |  |  |  |
Balance at beginning of year |  | 4,302,747 | 3,848,161 | 3,415,105
Depreciation |  | 562,760 | 540,708 | 531,848
Disposition of real estate assets | [2] | (817) | (86,122) | (98,792)
Balance at end of year |  | $ 4,864,690 | $ 4,302,747 | $ 3,848,161
[1] | Includes non-cash activity related to acquisitions.
[2] | Includes assets sold, casualty losses and removal of certain fully depreciated assets.

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- Definition Amount of accumulated depreciation pertaining to real estate investments for entities with a substantial portion of business acquiring and holding investment real estate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 970 -SubTopic 360 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28(Column F)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479438/970-360-S99-1 + Details
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- Definition Amount of decrease to accumulated depreciation for real estate investments sold for entities with a substantial portion of business acquiring and holding investment real estate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 970 -SubTopic 360 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28(Footnote 4)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479438/970-360-S99-1 + Details
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- Definition Amount, before accumulated depreciation, of real estate investment by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate. Excludes real estate not held as investment or interest. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 970 -SubTopic 360 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28(Column E)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479438/970-360-S99-1 + Details
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