Commitments, Contingencies and Guarantees	6 Months Ended
Commitments, Contingencies and Guarantees	Jun. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments, Contingencies and Guarantees	Commitments, Contingencies and Guarantees Contingencies In the ordinary course of business, various legal actions are brought and are pending against the Company and its subsidiaries in the U.S. and internationally. In some of these actions, substantial amounts are claimed. The Company is also involved, from time to time, in reviews, examinations, investigations and proceedings by governmental and self-regulatory agencies (both formal and informal) regarding the Company’s businesses, operations, reporting or other matters, which may result in regulatory, civil and criminal judgments, settlements, fines, penalties, injunctions, enhanced oversight, remediation, or other relief. The following generally does not include matters that the Company has pending against other parties which, if successful, would result in awards in favor of the Company or its subsidiaries. Employment, Competitor-Related and Other Litigation From time to time, the Company and its subsidiaries are involved in litigation, claims and arbitrations in the U.S. and internationally, relating to, inter alia, various employment matters, including with respect to termination of employment, hiring of employees currently or previously employed by competitors, terms and conditions of employment and other matters. In light of the competitive nature of the brokerage industry, litigation, claims and arbitration between competitors regarding employee hiring are not uncommon. The Company is also involved, from time to time, in other reviews, investigations and proceedings by governmental and self-regulatory agencies (both formal and informal) regarding the Company’s businesses. Any such actions may result in regulatory, civil or criminal judgments, settlements, fines, penalties, injunctions, enhanced oversight, remediation, or other relief. Legal reserves are established in accordance with U.S. GAAP guidance on Accounting for Contingencies, when a material legal liability is both probable and reasonably estimable. Once established, reserves are adjusted when there is more information available or when an event occurs requiring a change. The outcome of such items cannot be determined with certainty. The Company is unable to estimate a possible loss or range of loss in connection with specific matters beyond its current accruals and any other amounts disclosed. Management believes that, based on currently available information, the final outcome of these current pending matters will not have a material adverse effect on the Company’s financial condition, results of operations, or cash flows. Letter of Credit Agreements The Company has irrevocable uncollateralized letters of credit with various banks, where the beneficiaries are clearing organizations through which it transacts, that are used in lieu of margin and deposits with those clearing organizations. As of both June 30, 2024 and December 31, 2023 the Company was contingently liable for $1.4 million under these letters of credit. Risk and Uncertainties The Company generates revenues by providing financial intermediary and brokerage activities to institutional customers and by executing and, in some cases, clearing transactions for institutional counterparties. Revenues for these services are transaction-based. As a result, revenues could vary based on the transaction volume of global financial markets. Additionally, financing is sensitive to interest rate fluctuations, which could have an impact on the Company’s overall profitability. Financial instruments that potentially subject the Company to concentration of credit risk consist of cash accounts in a financial institution which, at times, may exceed the FDIC maximum coverage limit of $250,000. Any loss incurred or a lack of access to such funds could have a significant adverse impact on the Company’s Consolidated Financial Statements. For the three and six months ended June 30, 2024 and 2023, the Company did not incur losses on any FDIC insured cash accounts. During the three months ended June 30, 2024 and 2023 and the six months ended June 30, 2024 and 2023, the Company reserved $2.0 million, $2.0 million, $4.0 million and $4.0 million, respectively, in connection with potential losses associated with Russia’s Invasion of Ukraine, which is included in “Other expenses” in the Company’s unaudited Condensed Consolidated Statements of Operations, and which was recorded as part of the allowance for credit losses (see Note 25—“Current Expected Credit Losses (CECL)” for additional information). Insurance The Company is self-insured for health care claims, up to a stop-loss amount for eligible participating employees and qualified dependents in the U.S., subject to deductibles and limitations. The Company’s liability for claims incurred but not reported is determined based on an estimate of the ultimate aggregate liability for claims incurred. The estimate is calculated from actual claim rates and adjusted periodically as necessary. The Company has accrued $3.3 million and $3.7 million in health care claims as of June 30, 2024 and December 31, 2023, respectively. The Company does not expect health care claims to have a material impact on its financial condition, results of operations, or cash flows. Guarantees The Company provides guarantees to securities clearinghouses and exchanges which meet the definition of a guarantee under FASB interpretations. Under these standard securities clearinghouse and exchange membership agreements, members are required to guarantee, collectively, the performance of other members and, accordingly, if another member becomes unable to satisfy its obligations to the clearinghouse or exchange, all other members would be required to meet the shortfall. In the opinion of management, the Company’s liability under these agreements is not quantifiable and could exceed the cash and securities it has posted as collateral. However, the potential of being required to make payments under these arrangements is remote. Accordingly, no contingent liability has been recorded in the Company’s unaudited Condensed Consolidated Statements of Financial Condition for these agreements.