Annual report pursuant to Section 13 and 15(d)

Revenue from Contracts With Customers - Summary of Revenue from Contracts (Details)

v3.24.0.1
Revenue from Contracts With Customers - Summary of Revenue from Contracts (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disaggregation Of Revenue [Line Items]      
Net commissions and fees $ 2,026,596 $ 1,711,861 $ 1,432,179
Wholesale brokerage [Member]      
Disaggregation Of Revenue [Line Items]      
Net commissions and fees 1,319,056 1,129,241 931,979
Binding authorities [Member]      
Disaggregation Of Revenue [Line Items]      
Net commissions and fees 275,961 231,048 209,622
Underwriting management [Member]      
Disaggregation Of Revenue [Line Items]      
Net commissions and fees $ 431,579 $ 351,572 $ 290,578