Annual report pursuant to Section 13 and 15(d)

Schedule III - Real Estate and Accumulated Depreciation (Details 2)

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Schedule III - Real Estate and Accumulated Depreciation (Details 2) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Changes in cost of properties      
Beginning balance $ 4,148,529 $ 3,980,813 $ 3,874,715
Improvements and other additions 480,418 224,524 259,548
Sales (242,497) (53,547) (138,216)
Impairments (329) (2,493) (15,116)
Other dispositions (340) (768) (118)
Reclassification to right-of use asset (37,775) 0 0
Ending balance 4,348,006 4,148,529 3,980,813
Changes in accumulated depreciation      
Beginning balance 897,903 801,038 715,951
Depreciation expense 117,973 112,610 107,772
Sales (8,416) (14,845) (22,567)
Impairments 0 (132) 0
Other dispositions (340) (768) (118)
Ending balance $ 1,007,120 $ 897,903 $ 801,038