Schedule III-Real Estate and Accumulated Depreciation - Property And Accumulated Depreciation Roll forward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Changes in total real estate assets
Balances, beginning of year	$ 9,256,712	$ 8,993,049	$ 8,878,820
Additions	100,616	419,369	176,690
Dispositions and retirements	(509,778)	(155,706)	(62,461)
Balances, end of year	8,847,550	9,256,712	8,993,049
Aggregate gross cost of the property for federal income tax purposes	8,877,859
Changes in accumulated depreciation
Balances, beginning of year	2,562,133	2,349,536	2,093,044
Additions	282,158	287,925	287,846
Dispositions and retirements	(280,947)	(75,328)	(31,354)
Balances, end of year	$ 2,563,344	$ 2,562,133	$ 2,349,536