Schedule III Real Estate and Accumulated Depreciation [Schedule] (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate Investments [Abstract]
Balance at beginning of year	$ (13,292,039,000)	$ (12,972,170,000)	$ (8,215,768,000)
Acquisitions	130,187,000	127,710,000	4,961,140,000
Less: FMV of Leases included in Acquisitions	(796,000)	(1,488,000)	(51,588,000)
Improvement and development	253,954,000	322,829,000	202,614,000
Disposition of real estate assets	(18,577,000)	(123,861,000)	(355,764,000)
Balance at end of year	(13,656,807,000)	(13,292,039,000)	(12,972,170,000)
Real Estate and Accumulated Depreciation Disclosure [Abstract]
Balance at beginning of year	2,075,071,000	1,674,801,000	1,499,213,000
Depreciation	485,654,000	463,590,000	314,076,000
Disposition of real estate assets	(11,438,000)	(63,320,000)	(138,488,000)
Balance at end of year	2,549,287,000	2,075,071,000	1,674,801,000
Assets Held-for-sale
Real Estate Investments [Abstract]
Balance at beginning of year	(5,321,000)	0
Balance at end of year	0	(5,321,000)	0
Real Estate and Accumulated Depreciation Disclosure [Abstract]
Accumulated depreciation	$ 0	$ 0	$ 0