Segment Information (Net Income to NOI Reconciliation) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting [Abstract]
Net income	$ 53,375	$ 26,993
Depreciation and amortization expense	117,443	95,354
General and administrative expense	41,216	44,186
Transaction related costs and other	1,005	843
Income from partially owned entities	(33,714)	(29,073)
(Income) loss from real estate fund investments	(5,674)	169
Interest and other investment income, net	(1,018)	(1,522)
Interest and debt expense	52,109	50,064
Net gains on disposition of wholly owned and partially owned assets	(6,552)	0
Income tax expense	7,411	1,984
NOI from partially owned entities	78,692	78,756
NOI attributable to noncontrolling interests in consolidated subsidiaries	(20,035)	(17,646)
NOI at share	284,258	250,108
Non-cash adjustments for straight-line rents, amortization of acquired below-market leases, net and other	(3,130)	(1,198)
NOI at share - cash basis	$ 281,128	$ 248,910