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Real Estate Facilities (Schedule of Real Estate Activities) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Operating facilities, at cost: |  |  |
Beginning balance (Operating facilities, at cost) | $ 22,807,833 | $ 17,372,627 | $ 16,289,146
Capital expenditures to maintain real estate facilities | 452,316 | 284,200 | 163,834
Acquisitions | 733,442 | 4,940,413 | 781,219
Dispositions | (1,704) | (7,408) | (303)
Developed or expanded facilities opened for operation | 227,239 | 218,001 | 138,731
Ending balance (Operating facilities, at cost) | 24,219,126 | 22,807,833 | 17,372,627
Accumulated depreciation: |  |  |
Beginning balance (Accumulated depreciation) | (7,773,308) | (7,152,135) | (6,623,475)
Depreciation expense | (781,931) | (625,968) | (528,660)
Dispositions | 1,084 | 4,795 | 0
Ending balance (Accumulated depreciation) | (8,554,155) | (7,773,308) | (7,152,135)
Construction in process: |  |  |
Beginning balance (Construction in process) | 272,471 | 188,079 | 141,934
Costs incurred to develop and expand real estate facilities | 336,948 | 302,393 | 188,102
Write-off of cancelled projects and transfer to other assets | (9,188) | 0 | (3,226)
Developed or expanded facilities opened for operation | (227,239) | (218,001) | (138,731)
Ending balance (Construction in process) | 372,992 | 272,471 | 188,079
Total real estate facilities | $ 16,037,963 | $ 15,306,996 | $ 10,408,571

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