Dispositions of Real Estate and Discontinued Operations - Schedule of Results of Discontinued Operations (Details) - Held-for-sale - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Rental and related revenues	$ 0	$ 5,228
Resident fees and services	2,655	72,998
Total revenues	2,655	78,226
Interest expense	0	2,676
Operating	2,674	71,519
Transaction costs	0	76
Total costs and expenses	2,674	74,271
Gain (loss) on sales of real estate, net	(71)	259,662
Other income (expense), net	3	5,885
Total other income (expense), net	(68)	265,547
Income (loss) before income taxes and equity income (loss) from unconsolidated joint ventures	(87)	269,502
Income tax benefit (expense)	340	821
Equity income (loss) from unconsolidated joint ventures	64	(315)
Income (loss) from discontinued operations	$ 317	$ 270,008