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Borrowings - Interest Expense on Broker-Dealer Facilities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Line of Credit Facility [Line Items]
Interest expense	$ 23,430	$ 24,850	$ 46,662	$ 49,138
Broker-dealer credit facilities
Line of Credit Facility [Line Items]
Interest expense	1,990	2,105	3,581	3,757
Uncommitted facility
Line of Credit Facility [Line Items]
Interest expense	1,009	1,987	1,610	3,547
Committed facility
Line of Credit Facility [Line Items]
Interest expense	916	0	1,793	0
Overdraft facility
Line of Credit Facility [Line Items]
Interest expense	$ 65	$ 118	$ 178	$ 210

X

- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

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