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Derivative Instruments - Fair Value of Derivative Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Equities futures | Derivative instruments not designated as hedging instruments | Receivables from broker-dealers and clearing organizations
Derivatives Assets
Fair Value	$ (60)	$ (541)
Notional	1,017,174	1,069,167
Equities futures | Derivative instruments not designated as hedging instruments | Payables to broker-dealers and clearing organizations
Derivatives Liabilities
Fair Value	1,399	527
Notional	940,143	1,774,043
Commodity futures | Derivative instruments not designated as hedging instruments | Receivables from broker-dealers and clearing organizations
Derivatives Assets
Fair Value	(20,294)	5,096
Notional	11,492,904	5,610,161
Commodity futures | Derivative instruments not designated as hedging instruments | Payables to broker-dealers and clearing organizations
Derivatives Liabilities
Fair Value	(4,409)	(277)
Notional	171,504	56,331
Currency futures | Derivative instruments not designated as hedging instruments | Receivables from broker-dealers and clearing organizations
Derivatives Assets
Fair Value	4,418	(6,093)
Notional	4,575,259	5,211,677
Currency futures | Derivative instruments not designated as hedging instruments | Payables to broker-dealers and clearing organizations
Derivatives Liabilities
Fair Value	216	7,382
Notional	212,120	2,232,543
Fixed income futures | Derivative instruments not designated as hedging instruments | Receivables from broker-dealers and clearing organizations
Derivatives Assets
Fair Value	(25)	(3,890)
Notional	11,711	110,748
Fixed income futures | Derivative instruments not designated as hedging instruments | Payables to broker-dealers and clearing organizations
Derivatives Liabilities
Fair Value	(199)	(74)
Notional	383,154	21,077
Options
Derivatives Assets
Fair Value	97,459	55,423
Derivatives Liabilities
Fair Value	216,992	5,240
Options | Derivative instruments not designated as hedging instruments | Financial instruments owned
Derivatives Assets
Fair Value	97,459	55,423
Notional	2,565,169	808,189
Options | Derivative instruments not designated as hedging instruments | Financial instruments sold, not yet purchased
Derivatives Liabilities
Fair Value	216,992	5,240
Notional	2,637,691	820,023
Currency forwards
Derivatives Assets
Fair Value	211,856	716,970
Derivatives Liabilities
Fair Value	198,463	681,878
Currency forwards | Derivative instruments not designated as hedging instruments | Financial instruments owned
Derivatives Assets
Fair Value	211,856	716,970
Notional	28,015,291	42,202,047
Currency forwards | Derivative instruments not designated as hedging instruments | Financial instruments sold, not yet purchased
Derivatives Liabilities
Fair Value	198,463	681,878
Notional	28,008,595	42,184,501
Interest Rate Swap
Derivatives Liabilities
Fair Value		2,572
Interest Rate Swap | Derivative instruments designated as hedging instruments | Payables to broker-dealers and clearing organizations
Derivatives Liabilities
Fair Value	0	2,572
Notional	$ 0	$ 1,075,000

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Nominal or face amount used to calculate payments on the derivative asset.

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