XML 90 R80.htm IDEA: XBRL DOCUMENT v3.23.3
Related Party Transactions - Clearing Capital Agreement with Cantor (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Related Party        
Related Party Transaction [Line Items]        
Cash and collateral posted expense $ 0.7 $ 0.2 $ 1.5 $ 0.6