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Securities Owned - Schedule of Securities Owned/Sold But Not Yet Purchased (Detail) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
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Security Owned and Sold Not yet Purchased, at Fair Value [Line Items] |  |
Securities Owned Total | $ 125,110 | $ 127,166
Trading Securities [Member] |  |
Security Owned and Sold Not yet Purchased, at Fair Value [Line Items] |  |
Securities Owned Total | $ 125,110 | $ 127,166

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Fair value of financial instruments held by a broker-dealer for their own account (proprietary securities) for trading or investment purposes determined by management based upon quoted prices of a financial instrument with similar characteristics or on a valuation technique or model. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=35711157&loc=d3e42546-110969 + Details
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- Details
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