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JOINT VENTURES AND PARTNERSHIPS - Commitments (Details) $ in Thousands	1 Months Ended		3 Months Ended		6 Months Ended
	Apr. 28, 2021 USD ($)	Jan. 31, 2021 USD ($) home community	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Feb. 28, 2022	Mar. 31, 2021 USD ($) home	Dec. 31, 2020 USD ($)
Joint Ventures
Investment in unconsolidated entities			$ 613,903		$ 613,903				$ 595,486
Balance payments made	$ 12,500
Gain/(loss) on sale of real estate owned				$ 61,303	50,829	$ 61,303
Deferred fees from the sale of properties			9,100		9,100				8,400
Joint venture management and other fees			$ 2,232	$ 1,274	$ 3,847	$ 2,662
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Preferred Equity Investment Herndon, Virginia
Joint Ventures
Investment in unconsolidated entities		$ 30,200
Preferred return (as a percent)		9.00%
Joint venture, number of homes in communities | home		356
Preferred Equity Investment Allen, Texas
Joint Ventures
Investment in unconsolidated entities								$ 19,800
Number of apartment homes | home								469
Preferred return (as a percent)								9.00%
Preferred Equity Investment Los Angeles, California
Joint Ventures
Number of apartment homes | community		293
Proceeds from sale of real estate		$ 121,000
Gain/(loss) on sale of real estate owned		$ 2,500
Preferred Equity Investment 1200 Broadway Nashville TN
Joint Ventures
Preferred return (as a percent)	12.25%
Preferred Equity Investment 1200 Broadway Nashville TN | Forecast
Joint Ventures
Preferred return (as a percent)							8.00%
Accounts Payable, Accrued Expenses and Other Liabilities | 13th and Market Properties LLC
Joint Ventures
Investment in unconsolidated entities			$ (5,300)		$ (5,300)				$ (4,700)

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