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Investments in Equity Affiliates, All Investments (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended			6 Months Ended
	Jan. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2020
Investment in Equity Affiliates
Indirect ownership percentage					9.20%
Income from equity affiliates		$ 4,759		$ 20,408	$ 27,010	$ 24,401
Noncontrolling interest invested					21,074	60
Arbor Residential Investor LLC
Investment in Equity Affiliates
Indirect ownership percentage	12.30%
Income from equity affiliates		4,800		$ 20,900	27,300	$ 23,800
Distribution received		5,600			18,700
Century Summerfield Apartments
Investment in Equity Affiliates
Equity Investment			$ 17,000				$ 20,000
Percentage of ownership interest of related party in the entity			50.00%
Income from equity affiliates		200
Distribution received		17,200
AMAC Holdings III LLC
Investment in Equity Affiliates
Equity Investment		$ 15,700			15,700
Noncontrolling interest			$ 30,000
Equity investment made			30,000
Income from equity affiliates			300		$ 500
Lexford Portfolio
Investment in Equity Affiliates
Noncontrolling interest			4,000
Equity investment made			$ 4,000

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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