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Significant Accounting Policies - Summary of Reclassifications Consolidated Statements of Cash Flows (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Cash Flows from Operating Activities |  |  |
Net cash provided by operating activities | $ 75,318 | $ 47,136 | $ 57,488
Cash Flows from Investing Activities |  |  |
Net cash provided by/(used in) investing activities | (99,632) | 10,641 | (17,661)
Purchases of securities owned, at fair value | 115,526 | 36,444 | 22,536
Proceeds from the sale of securities owned, at fair value | $ 19,441 | 18,703 | 11,880
Reclassification Of Net Cash Flow From Securities Purchases And Sales [Member] |  |  |
Cash Flows from Operating Activities |  |  |
Reclassification of net cash flows from securities purchases and sales |  | 17,741 | 10,656
Previously Reported [Member] |  |  |
Cash Flows from Operating Activities |  |  |
Net cash provided by operating activities |  | 29,395 | 46,832
Cash Flows from Investing Activities |  |  |
Net cash provided by/(used in) investing activities |  | 28,382 | (7,005)
Adjustment [Member] |  |  |
Cash Flows from Investing Activities |  |  |
Purchases of securities owned, at fair value |  | (36,444) | (22,536)
Proceeds from the sale of securities owned, at fair value |  | 18,703 | 11,880
As Corrected [Member] |  |  |
Cash Flows from Operating Activities |  |  |
Net cash provided by operating activities |  | 47,136 | 57,488
Cash Flows from Investing Activities |  |  |
Net cash provided by/(used in) investing activities |  | $ 10,641 | $ (17,661)

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