Dispositions of Real Estate and Discontinued Operations - Schedule of Results of Discontinued Operations (Details) - Held-for-sale - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rental and related revenues	$ 0	$ 1,613	$ 0	$ 6,841
Resident fees and services	2,825	30,273	5,480	103,270
Total revenues	2,825	31,886	5,480	110,111
Interest expense	0	1,177	0	3,853
Operating	2,442	33,647	5,116	105,165
Transaction costs	0	0	0	76
Impairments and loan loss reserves (recoveries), net	0	10,995	0	10,995
Total costs and expenses	2,442	45,819	5,116	120,089
Gain (loss) on sales of real estate, net	2,563	122,238	2,492	381,900
Other income (expense), net	16	128	19	6,012
Total other income (expense), net	2,579	122,366	2,511	387,912
Income (loss) before income taxes and equity income (loss) from unconsolidated joint ventures	2,962	108,433	2,875	377,934
Income tax benefit (expense)	30	302	370	1,124
Equity income (loss) from unconsolidated joint ventures	0	5,225	64	4,910
Income (loss) from discontinued operations	$ 2,992	$ 113,960	$ 3,309	$ 383,968