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Real Estate Activity - Schedule of Gain (Loss) on Sale or Write-down of Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
(Loss) gain on sale or write-down of assets, net	$ (24,445)	$ 5,339	$ (7,047)	$ 9,477
Overlook At Allensville Phase II Apartments
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Ownership interest sold			50.00%
Land
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
(Loss) gain on sale or write-down of assets, net	5,154	5,339	$ 11,111	9,477
Residential Properties
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
(Loss) gain on sale or write-down of assets, net	0	0	11,441	0
Other
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
(Loss) gain on sale or write-down of assets, net	$ (29,599)	$ 0	$ (29,599)	$ 0

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Real Estate Investment, Ownership Percentage Sold

+ References

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- Definition

Amount of gain (loss) from the difference between the sale price or salvage price and the book value of an asset that was sold or retired, and gain (loss) from the write down of assets from their carrying value to fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

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