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Schedule III - Real Estate and Accumulated Depreciation (Rollforward) (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Sep. 30, 2023 property
Changes in cost of properties |  |  |  |
Beginning balance | $ 4,986,537 | $ 4,959,709 | $ 4,686,802 |
Improvements and other additions | 333,081 | 350,702 | 342,684 |
Sales | (162,981) | (323,874) | (103,097) |
Impairments | (252,797) | 0 | 0 |
Other dispositions | 0 | 0 | (4,511) |
Reclassification from right-of-use asset | 0 | 0 | 37,831 |
Ending balance | 4,903,840 | 4,986,537 | 4,959,709 |
Changes in accumulated depreciation |  |  |  |
Beginning balance | 1,273,448 | 1,234,908 | 1,124,253 |
Depreciation expense | 132,728 | 124,803 | 130,604 |
Sales | (6,014) | (86,263) | (15,438) |
Other dispositions | 0 | 0 | (4,511) |
Ending balance | $ 1,400,162 | $ 1,273,448 | $ 1,234,908 |
Real Estate and Accumulated Depreciation |  |  |  |
Number of impaired parcels of land | property |  |  |  | 1
Other |  |  |  |
Real Estate and Accumulated Depreciation |  |  |  |
Number of impaired operating properties | property |  |  |  | 6

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