Contingencies, Commitments and Guarantees	12 Months Ended
Contingencies, Commitments and Guarantees	Dec. 31, 2025
Commitments and Contingencies Disclosure [Abstract]
Commitments Contingencies and Guarantees	CONTINGENCIES, COMMITMENTS AND GUARANTEES Legal Contingencies The Company has been named as a defendant in various legal actions, including complaints and litigation and arbitration claims, arising from its business activities. Such actions include claims related to securities brokerage and investment banking activities, and certain class actions that primarily allege violations of securities laws and seek unspecified damages, which could be substantial. Also, the Company is involved from time to time in investigations and proceedings by governmental agencies and self-regulatory organizations ("SROs") which could result in adverse judgments, settlements, penalties, fines or other relief. The Company accrues for potential losses resulting from pending and potential legal actions, investigations and regulatory proceedings when such losses are probable and reasonably estimable. In many cases, however, it is inherently difficult to determine whether any loss is probable or even possible or to estimate the amount or range of any potential loss, particularly where proceedings may be in relatively early stages or where plaintiffs are seeking substantial or indeterminate damages. Matters frequently need to develop before a probability of loss can be determined or range of loss can reasonably be estimated. Given uncertainties regarding the timing, scope, volume and outcome of pending and potential legal actions, investigations and regulatory proceedings and other factors, the amounts of accruals and ranges of reasonably possible losses are difficult to determine and of necessity subject to future revision. Subject to the foregoing, management of the Company believes, based on currently available information, after consultation with outside legal counsel and taking into account any prior accruals, that pending legal actions, investigations and regulatory proceedings will be resolved with no material adverse effect on the financial condition, results of operations or cash flows of the Company. If during any period a potential adverse contingency becomes probable or is resolved for an amount in excess of the established accrual, the results of operations and cash flows in that period and the financial condition as of the end of that period could be materially adversely affected. In addition, there can be no assurance that material losses will not be incurred from claims that have not yet been brought to the Company's attention or are not yet determined to be reasonably possible. Reasonably possible losses in excess of amounts accrued at December 31, 2025 are not material. In 2024, the Company settled investigations by the Securities and Exchange Commission ("SEC") and the Commodity Futures Trading Commission (the "CFTC") regarding compliance with recordkeeping requirements for business-related communications sent over unapproved electronic messaging channels. The settlement with the SEC included a civil penalty of $14.0 million and the settlement with the CFTC included a civil penalty of $2.0 million. The Company recorded a $4.0 million reversal of other operating expenses for the year ended December 31, 2024, and $20.0 million in other operating expenses for the year ended December 31, 2023 related to these investigations. Litigation-related accrual activity included $0.8 million in other operating expenses for the year ended December 31, 2025, a $2.2 million reversal of other operating expenses for the year ended December 31, 2024 and $20.2 million in other operating expenses for the year ended December 31, 2023. Investment Commitments As of December 31, 2025, the Company had commitments to invest $30.9 million in limited partnerships or limited liability companies that make direct or indirect equity or debt investments in companies. Other Guarantees The Company is a member of numerous exchanges. Under the membership agreements with these entities, members generally are required to guarantee the performance of other members, and if a member becomes unable to satisfy its obligations to the exchange, other members would be required to meet shortfalls. To mitigate these performance risks, the exchanges often require members to post collateral. In addition, the Company identifies and guarantees certain clearing agents against specified potential losses in connection with providing services to the Company or its affiliates. The Company's maximum potential liability under these arrangements cannot be quantified. However, management believes the likelihood that the Company would be required to make payments under these arrangements is remote. Accordingly, no liability is recorded in the consolidated statements of financial condition for these arrangements. Concentration of Credit Risk The Company provides investment, capital-raising and related services to a diverse group of domestic and foreign customers, including governments, corporations, and institutional investors. The Company's exposure to credit risk associated with the non-performance of customers in fulfilling their contractual obligations pursuant to securities transactions can be directly impacted by volatile securities markets, credit markets and regulatory changes. This exposure is measured on an individual customer basis and on a group basis for customers that share similar attributes. To alleviate the potential for risk concentrations, counterparty credit limits have been implemented for certain products and are continually monitored in light of changing customer and market conditions.