Business Segments - Summary of Information for Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Summary information for the reportable segments
Rental and other property revenues	$ 215,455	$ 229,827	$ 658,815	$ 684,262
Property operating expenses	74,929	77,484	224,532	232,090
Other operating expenses not allocated to segments	126,757	113,716	352,912	332,027
Total operating expenses	201,686	191,200	577,444	564,117
Proportionate property net operating income (loss)	13,769	38,627	81,371	120,145
Other items included in income before income tax benefit (expense)	(40,331)	(37,753)	(61,864)	243,174
(Loss) income before income tax benefit	(26,562)	874	19,507	363,319
Segment Reconciling Items [Member]
Summary information for the reportable segments
Rental and other property revenues	12,531	8,390	29,668	24,389
Property operating expenses	9,706	7,790	25,617	22,704
Total operating expenses	9,706	7,790	25,617	22,704
Proportionate property net operating income (loss)	2,825	600	4,051	1,685
(Loss) income before income tax benefit	2,825	600	4,051	1,685
Corporate Non-Segment [Member]
Summary information for the reportable segments
Rental and other property revenues	2,082	8,084	5,266	32,529
Property operating expenses	4,055	7,924	18,975	30,352
Other operating expenses not allocated to segments	126,757	113,716	352,912	332,027
Total operating expenses	130,812	121,640	371,887	362,379
Proportionate property net operating income (loss)	(128,730)	(113,556)	(366,621)	(329,850)
Other items included in income before income tax benefit (expense)	(40,331)	(37,753)	(61,864)	243,174
(Loss) income before income tax benefit	(169,061)	(151,309)	(428,485)	(86,676)
Same Store [Member] | Operating Segments [Member]
Summary information for the reportable segments
Rental and other property revenues	171,033	183,552	534,395	542,624
Property operating expenses	49,146	50,424	145,259	146,895
Total operating expenses	49,146	50,424	145,259	146,895
Proportionate property net operating income (loss)	121,887	133,128	389,136	395,729
(Loss) income before income tax benefit	121,887	133,128	389,136	395,729
Redevelopment and Development [Member] | Operating Segments [Member]
Summary information for the reportable segments
Rental and other property revenues	12,498	11,131	36,001	37,839
Property operating expenses	4,919	4,484	14,636	14,736
Total operating expenses	4,919	4,484	14,636	14,736
Proportionate property net operating income (loss)	7,579	6,647	21,365	23,103
(Loss) income before income tax benefit	7,579	6,647	21,365	23,103
Acquisition and Other Real Estate [Member] | Operating Segments [Member]
Summary information for the reportable segments
Rental and other property revenues	17,311	18,670	53,485	46,881
Property operating expenses	7,103	6,862	20,045	17,403
Total operating expenses	7,103	6,862	20,045	17,403
Proportionate property net operating income (loss)	10,208	11,808	33,440	29,478
(Loss) income before income tax benefit	$ 10,208	$ 11,808	$ 33,440	$ 29,478