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Borrowings - Interest Expense on Broker-Dealer Facilities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Line of Credit Facility [Line Items]
Interest expense	$ 33,297	$ 24,492	$ 95,739	$ 71,154
Broker-dealer credit facilities
Line of Credit Facility [Line Items]
Interest expense	1,967	2,086	6,341	5,667
Uncommitted facility
Line of Credit Facility [Line Items]
Interest expense	957	988	3,276	2,598
Committed facility
Line of Credit Facility [Line Items]
Interest expense	838	952	2,545	2,745
Overdraft facility
Line of Credit Facility [Line Items]
Interest expense	$ 172	$ 146	$ 520	$ 324

X

- Definition

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

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