Schedule III - Real Estate and Accumulated Depreciation - Summary of Changes in Accumulated Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Changes in accumulated depreciation
Balance, beginning of year	$ 6,696,281	$ 6,040,378	$ 5,360,389
Depreciation	831,083	785,725	743,749
Dispositions and other	(250,578)	(129,822)	(63,760)
Balance, end of year	$ 7,276,786	$ 6,696,281	$ 6,040,378