Investments in Real Estate Entities - Financial Position and Operating Results (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
ASSETS
Real estate, net	$ 18,366,021		$ 18,366,021		$ 18,233,781
Total assets	19,478,967		19,478,967		19,199,144
LIABILITIES AND EQUITY
Mortgage notes payable, net	827,667		827,667		862,332
Partners' capital	10,787,660		10,787,660		10,751,583
Total liabilities and equity	19,478,967		19,478,967		19,199,144
Combined summary of the operating results of the accounted for using the equity method
Rental and other income	580,774	$ 567,404	1,693,653	$ 1,745,459
Costs and Expenses	(508,374)	(455,887)	(1,445,074)	(1,362,534)
Gains (Losses) on Sales of Investment Real Estate	58	31,607	388,354	91,338
Interest expense, net	(55,987)	(53,249)	(164,704)	(162,562)
Depreciation expense	(193,791)	(175,348)	(561,560)	(529,508)
Net income	78,847	147,717	669,058	486,592
Company's share of net income from investments in unconsolidated entities	7,287	5,611	34,435	8,357
Amortization of excess investment and other	(420)	(528)	(1,476)	(1,587)
Income from investments in unconsolidated entities	6,867	5,083	32,959	6,770
AVA Arts District [Member]
Combined summary of the operating results of the accounted for using the equity method
Long-term Construction Loan	1,032		1,032
Equity Method Investment, Nonconsolidated Investee or Group of Investees
ASSETS
Real estate, net	1,171,955		1,171,955		1,249,730
Other assets	326,339		326,339		255,606
Total assets	1,498,294		1,498,294		1,505,336
LIABILITIES AND EQUITY
Mortgage notes payable, net	636,796		636,796		751,257
Other liabilities	172,660		172,660		163,808
Partners' capital	688,838		688,838		590,271
Total liabilities and equity	1,498,294		1,498,294		$ 1,505,336
Combined summary of the operating results of the accounted for using the equity method
Rental and other income	44,819	28,800	111,562	92,299
Costs and Expenses	(10,698)	(12,782)	(34,992)	(37,034)
Gains (Losses) on Sales of Investment Real Estate	0	18,408	164,317	18,448
Interest expense, net	(6,137)	(8,024)	(21,386)	(24,133)
Depreciation expense	(6,912)	(8,704)	(22,831)	(26,106)
Net income	$ 21,072	$ 17,698	$ 196,670	$ 23,474