Annual report pursuant to Section 13 and 15(d)

Schedule III Real Estate and Accumulated Depreciation - Reconciliation of Real Estate Assets and Accumulated Depreciation (Details)

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Schedule III Real Estate and Accumulated Depreciation - Reconciliation of Real Estate Assets and Accumulated Depreciation (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Real estate assets      
Balance, beginning of period $ 2,973,816 $ 2,831,683 $ 2,725,635
Property acquisitions [1] 516,054 220,495 124,306
Improvements [1] 140,109 103,404 84,560
Impairment write-down (24,432) (2,177) (81,982)
Write-off of disposed assets (7,430) (2,132) (2,655)
Property sales (438,654) (177,457) (18,181)
Balance, end of period 3,159,463 [2] 2,973,816 2,831,683
Accumulated depreciation      
Balance, beginning of period 770,535 690,417 657,425
Depreciation 107,938 98,141 94,558
Impairment write-down (16,058) (291) (48,830)
Write-off of disposed assets (2,173) (1,859) (1,708)
Property sales (147,612) (15,873) (11,028)
Balance, end of period $ 712,630 $ 770,535 $ 690,417
[1]
Includes non-cash accruals for capital items.
[2]
At December 31, 2019, total land, buildings and improvements are carried at $1,917.8 million for federal income tax purposes.