Annual report pursuant to Section 13 and 15(d)

Schedule III - Real Estate and Accumulated Depreciation (Rollforward) (Details)

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Schedule III - Real Estate and Accumulated Depreciation (Rollforward) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Changes in cost of properties      
Beginning balance $ 4,686,802 $ 4,348,006 $ 4,148,529
Improvements and other additions 342,684 405,940 480,418
Sales (103,097) (65,475) (242,497)
Impairments 0 (1,530) (329)
Other dispositions (4,511) (139) (340)
Reclassification from (to) right-of-use asset 37,831 0 (37,775)
Ending balance 4,959,709 4,686,802 4,348,006
Changes in accumulated depreciation      
Beginning balance 1,124,253 1,007,120 897,903
Depreciation expense 130,604 119,377 117,973
Sales (15,438) (2,105) (8,416)
Other dispositions (4,511) (139) (340)
Ending balance $ 1,234,908 $ 1,124,253 $ 1,007,120