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Derivative Instruments - Gain (Loss) From Derivative Instruments (Details) - USD ($) $ in Thousands	1 Months Ended			3 Months Ended		6 Months Ended
	Jun. 30, 2024	Dec. 31, 2023	Oct. 31, 2019	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Trading income, net and other, net				$ 147,833	$ 48,276	$ 212,301	$ 45,083
Derivative instruments designed as hedging instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Other comprehensive income				1,391	78	1,822	13,525
Futures \| Not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Trading income, net and other, net				56,616	26,170	26,385	27,702
Currency forwards \| Not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Trading income, net and other, net				72,937	7,520	161,964	1,459
Options \| Not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Trading income, net and other, net				18,405	20,280	26,987	33,318
Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Derivative contract term		2 years	5 years
Derivative, notional amount	$ 1,075,000	$ 1,525,000	$ 525,000		1,075,000		1,075,000
Gain on derivative instrument	$ 5,700
Interest Rate Swap \| Not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Trading income, net and other, net				0	5,686	0	5,686
Interest Rate Swap \| Derivative instruments designed as hedging instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Other comprehensive income				1,391	78	1,822	13,525
Terminated Interest Rate Swaps \| Not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Trading income, net and other, net				$ (125)	$ (11,380)	$ (3,035)	$ (23,082)