Schedule III Real Estate and Accumulated Depreciation [Schedule] (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Real estate investments:
Balance at beginning of year	$ 14,338,895	$ 13,898,707	$ 13,656,807
Acquisitions	44,086	56,327	105,730
Less: FMV of leases included in acquisitions			(512)
Improvement and development	506,775	437,268	302,380
Disposition of real estate assets	(185,519)	(53,407)	(165,698)
Balance at end of year	14,704,237	14,338,895	13,898,707
Accumulated depreciation:
Balance at beginning of year	3,415,105	2,955,253	2,549,287
Depreciation	531,848	508,746	493,674
Disposition of real estate assets	(98,792)	(48,894)	(87,708)
Balance at end of year	$ 3,848,161	$ 3,415,105	$ 2,955,253