Financial Instruments and Other Inventory Positions Owned and Financial Instruments and Other Inventory Positions Sold, but Not Yet Purchased - Schedule of Gross Fair Market Value and Total Absolute Notional Contract Amount (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Derivatives
Derivative, Notional Amount	$ 1,489,631	$ 1,695,981
Financial instruments and other inventory positions owned
Derivatives
Derivative assets	60,600	157,064
Financial instruments and other inventory positions sold, but not yet purchased
Derivatives
Derivative liabilities	50,920	150,913
Customer matched-book | Interest rate derivative contract
Derivatives
Derivative, Notional Amount	1,354,881	1,630,056
Customer matched-book | Interest rate derivative contract | Financial instruments and other inventory positions owned
Derivatives
Derivative assets	55,414	157,064
Customer matched-book | Interest rate derivative contract | Financial instruments and other inventory positions sold, but not yet purchased
Derivatives
Derivative liabilities	49,838	149,353
Trading securities | Interest rate derivative contract
Derivatives
Derivative, Notional Amount	134,750	65,925
Trading securities | Interest rate derivative contract | Financial instruments and other inventory positions owned
Derivatives
Derivative assets	5,186	0
Trading securities | Interest rate derivative contract | Financial instruments and other inventory positions sold, but not yet purchased
Derivatives
Derivative liabilities	$ 1,082	$ 1,560