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Investments in Equity Affiliates - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Investment in Equity Affiliates
Income (loss) from equity affiliates	$ 809	$ 4,748	$ 20,694	$ 18,507
Indirect ownership percentage			9.20%
Arbor Residential Investor LLC
Investment in Equity Affiliates
Income (loss) from equity affiliates	(1,300)	300	$ 1,300	6,400
Indirect ownership percentage			12.30%
Arbor Residential Investor LLC | Other Related Party Transactions
Investment in Equity Affiliates
Distribution from investment classified as return capital	7,500	7,300	$ 15,000	22,300
Fifth Wall Ventures
Investment in Equity Affiliates
Distribution from investment classified as return capital		700		1,600
Noncontrolling interest			800	8,700
Loss on investment	800		1,000
AMAC Holdings III LLC
Investment in Equity Affiliates
Noncontrolling interest					$ 4,900
Loss on investment	700	700	1,600	1,800
Distribution received		200	1,100	400
Lexford Portfolio
Investment in Equity Affiliates
Distribution received		5,000	7,200	$ 11,000
Equity Participation Interest
Investment in Equity Affiliates
Proceeds from sale	$ 3,500	$ 2,600	$ 14,500

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