Investments (Details)	1 Months Ended	3 Months Ended		9 Months Ended
	Dec. 31, 2022 USD ($) d	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 08, 2017 USD ($)
Schedule of Equity Method Investments
Equity income of subsidiaries		$ 5,700,000	$ 100,000	$ 14,221,000	$ 100,000
Proceeds from the exercise of redemption option		105,500,000		105,501,000	0
Equity method investment	$ 91,300,000
Unrealized gain (loss)				0	(13,944,000)
Realized gain (loss) on marketable securities		0	0	0	0
Payments to acquire investments			0	0	2,723,000
Debt securities	$ 8,688,000	7,691,000		7,691,000
Maximum
Schedule of Equity Method Investments
Unrealized gain (loss)		$ 0	$ (1,300,000)	$ (1,000,000)	$ (15,200,000)
CF Real Estate Finance Holdings, L.P.
Schedule of Equity Method Investments
Equity method investment ownership percentage		27.00%		27.00%
Rescission of ownership percentage by parent	27.20%
Redemption notice, threshold trading days | d	20
Payment for administrative fees	$ 44,000
Equity method investment						$ 100,000,000