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Related Party Transactions - Clearing Capital Agreement with Cantor (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Related Party |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Cash and collateral posted expense | $ 0.5 | $ 0.2 | $ 0.8 | $ 0.3

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