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Related Party Transactions - Acquisition of Spring11 Ownership Interest from Cantor (Details) - USD ($) | 1 Months Ended | 3 Months Ended
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Feb. 28, 2023 | Mar. 31, 2023 | Mar. 31, 2022
Related Party Transaction |  |  |
Fees to related parties |  | $ 7,792,000 | $ 6,829,000
CFS11 | Spring 11 | Equity Purchase Agreement |  |  |
Related Party Transaction |  |  |
Fees to related parties | $ 11,530,598 |  |
CFS11 | Spring 11 | Equity Purchase Agreement | Newmark S11 LP LLC |  |  |
Related Party Transaction |  |  |
Equity method investment ownership percentage | 33.78% |  |
CFS11 | Spring 11 | Equity Purchase Agreement | Newmark S11 | Newmark S11 LP LLC |  |  |
Related Party Transaction |  |  |
Equity method investment ownership percentage | 100.00% |  |
Economic interest, percentage | 25.62% |  |

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