Investments in Real Estate Partnerships - Schedule of Revenues and Expenses for Investments in Real Estate Partnerships (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Total revenues	$ 1,166,161	$ 1,016,175	$ 1,133,138
Operating expenses:
Depreciation and amortization	303,331	345,900	374,283
Operating and maintenance	184,553	170,073	169,909
General and administrative	78,218	75,001	74,984
Real estate taxes	142,129	143,004	136,236
Other operating expenses	5,751	12,642	7,814
Total operating expenses	713,982	746,620	763,226
Other expense (income):
Interest expense, net	145,170	156,678	151,264
Gain on sale of real estate	(91,119)	(67,465)	(24,242)
Early extinguishment of debt		21,837	11,982
Provision for impairment	84,389	18,536	54,174
Total other expense (income)	132,977	256,407	187,610
Net income	366,288	47,317	243,258
Real Estate Partnership
Schedule of Equity Method Investments [Line Items]
Total revenues	416,222	381,094	417,053
Operating expenses:
Depreciation and amortization	94,026	101,590	97,844
Operating and maintenance	66,061	65,146	65,811
General and administrative	5,837	5,870	6,201
Real estate taxes	54,618	53,747	53,410
Other operating expenses	3,624	3,126	2,709
Total operating expenses	224,166	229,479	225,975
Other expense (income):
Interest expense, net	58,109	66,786	75,449
Gain on sale of real estate	(75,162)	(7,146)	(64,798)
Early extinguishment of debt	0	554	0
Provision for impairment	9,833	0	9,223
Total other expense (income)	(7,220)	60,194	19,874
Net Income [Member]
Other expense (income):
Net income	199,276	91,421	171,204
Unconsolidated Properties [Member]
Other expense (income):
Income (Loss) from Equity Method Investments	$ 47,086	$ 34,169	$ 60,956