Segment Information (Net Income to NOI Reconciliation) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting [Abstract]
Net income	$ 62,733	$ 68,903	$ 73,931	$ 122,278
Depreciation and amortization expense	107,162	118,662	213,727	236,105
General and administrative expense	39,410	31,902	81,005	73,118
Transaction related costs and other	30	2,960	688	3,965
Income from partially owned entities	(37,272)	(25,720)	(53,938)	(59,434)
Loss (income) from real estate fund investments	102	142	121	(5,532)
Interest and other investment income, net	(13,255)	(3,036)	(22,858)	(4,054)
Interest and debt expense	87,165	62,640	173,402	114,749
Net gains on disposition of wholly owned and partially owned assets	(936)	(28,832)	(8,456)	(35,384)
Income tax expense	4,497	3,564	9,164	10,975
NOI from partially owned entities	70,745	74,060	138,842	152,752
NOI attributable to noncontrolling interests in consolidated subsidiaries	(18,742)	(16,299)	(30,506)	(36,334)
NOI at share	301,639	288,946	575,122	573,204
Non-cash adjustments for straight-line rents, amortization of acquired below-market leases, net and other	(5,570)	(4,275)	(518)	(7,405)
NOI at share - cash basis	$ 296,069	$ 284,671	$ 574,604	$ 565,799