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Revenue Recognition - Schedule of Represents Loss Related to Principal Transactions (Details) - USD ($) | 3 Months Ended
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Mar. 31, 2025 | Dec. 31, 2024 | Mar. 31, 2024
Principal transactions and proprietary trading |  |  |
Realized and unrealized gain on primarily riskless principal transactions | $ 3,712,000 |  | $ 3,443,000
Increase (Decrease) on realized and unrealized gain on primarily riskless principal transactions |  | $ 269,000 |
Unrealized gain on investment in equity security | 9,233,000 |  |
Increase (Decrease) on unrealized gain on investment in equity security |  | 9,233,000 |
Realized and unrealized gain on portfolio of U.S. government securities | 16,000 |  | 63,000
Increase (Decrease) on realized and unrealized gain on portfolio of U.S. government securities |  | (47,000) |
Total Principal transactions and proprietary trading | $ 12,961,000 |  | $ 3,506,000
Increase (Decrease) on principal transactions and proprietary trading |  | $ 9,455,000 |

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- Definition Increase (Decrease) on Realized and Unrealized Gain on Securities. + References No definition available. + Details
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- Definition Total Principal transactions and proprietary trading. + References No definition available. + Details
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- Definition Amount of realized and unrealized gain (loss), from the firm's direct investment activity, conducted separately from customer trading activities, and includes, but is not limited to, investments in private equity, alternative investment products, real estate, and exchanges and memberships. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(13)(h)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(13)(g)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 + Details
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- Definition Amount of realized and unrealized gain (loss) resulting from the difference between acquisition price and selling price or fair value of trading assets and trading liabilities, and from the firm's direct investment activity, conducted separately from customer trading activities, including, but not limited to, investments in private equity, alternative investment products, real estate, and exchanges and memberships. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 940 -SubTopic 320 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479048/940-320-50-1 + Details
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