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Revenues from Contracts with Customers - Summary of Revenues from Contracts with Customers (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Revenues Categorized as Revenues from Contracts with Customers and Other Sources of Revenues [Line Items] |  |  |
Total operating revenues | $ 301,345 | $ 304,318 | $ 249,912
Advisory Fees [Member] |  |  |
Revenues Categorized as Revenues from Contracts with Customers and Other Sources of Revenues [Line Items] |  |  |
Total operating revenues | 293,632 | 298,052 | 246,395
Other Income [Member] |  |  |
Revenues Categorized as Revenues from Contracts with Customers and Other Sources of Revenues [Line Items] |  |  |
Total operating revenues | $ 7,713 | $ 6,266 | $ 3,517

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- Definition Revenues from operations, excluding interest and dividend income. Includes revenues from the following sources: investment banking (underwriting and financial advisory), principal transactions (sales and trading, and investment gains and losses), commissions, asset management, and investment advisory and other services. + References No definition available. + Details
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- Definition Revenues Categorized As Revenues From Contracts With Customers And Other Sources Of Revenues [Line Items] + References No definition available. + Details
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- Details
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