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Basis of Presentation and Summary of Significant Accounting Policies (Details Textual1) - USD ($) | 12 Months Ended
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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

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