Acquisitions and Divestitures (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($) property residential_unit	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) property residential_unit	Sep. 30, 2022 USD ($) property	Dec. 31, 2022 USD ($)	Apr. 30, 2019 USD ($)
Business Acquisition [Line Items]
Carrying Value	$ 20,107,790,000		$ 20,107,790,000		$ 21,285,446,000
Commercial and Residential Lending Segment | Orlando, Florida | Credit deteriorated
Business Acquisition [Line Items]
Carrying Value						$ 18,500,000
Operating Properties | Investing and Servicing Segment
Business Acquisition [Line Items]
Number of properties sold | property	2		3	2
Gain on sale of property	$ 10,600,000	$ 13,700,000	$ 15,400,000	$ 25,400,000
Proceeds from sale of operating properties	34,600,000	$ 19,500,000	50,900,000	54,000,000
Gain on sale of property attributable to noncontrolling interest				600,000
Operating Properties | Commercial and Residential Lending Segment | Orlando, Florida
Business Acquisition [Line Items]
Gain on sale of property				86,600,000
Proceeds from sale of operating properties				$ 114,800,000
Residential Units | Commercial and Residential Lending Segment
Business Acquisition [Line Items]
Gain on sale of property	0		0
Proceeds from sale of operating properties	$ 9,100,000		$ 12,100,000
Number of residential units sold | residential_unit	3		4