Basis of Presentation and Summary of Significant Accounting Policies (Details Textual1) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Equity method investment	$ 0	$ 158,558,000
Realized and unrealized gains (losses) on equity investments	700,000	20,302,000	$ 6,585,000
Common Stock [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Unrealized gains (losses) on investment	700,000	(6,100,000)	0
Property Technology Funds [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Unrealized gains (losses) on investment	0	300,000	6,600,000
IQHQ [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Equity method investment	59,700,000	59,700,000
Realized gain on investment		5,700,000
Unrealized gains (losses) on investment		$ 20,500,000
Realized and unrealized gains (losses) on equity investments	$ 0		$ 0