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Related Party Transactions - Narrative (Details) - Equity Method Investee - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Related Party Transactions        
Commission expense $ 11.5 $ 12.2 $ 33.8 $ 36.5
Operating Cost and Expense, Related Party, Type [Extensible Enumeration] us-gaap:RelatedPartyMember us-gaap:RelatedPartyMember us-gaap:RelatedPartyMember us-gaap:RelatedPartyMember