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Investments - Investments in Variable Interest Entities (Detail) - USD ($) | Mar. 31, 2024 | Dec. 31, 2023
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Variable Interest Entity [Line Items] |  |
Maximum Exposure to Loss | $ 5,300,000 | $ 5,700,000
Receivables from related parties | 5,254,000 | 2,717,000
Variable interest entity, not primary beneficiary |  |
Variable Interest Entity [Line Items] |  |
Investment | 2,100,000 | 2,857,000
Maximum Exposure to Loss | $ 2,100,000 | $ 2,857,000

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