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Investments - Summary of Details on Realized and Unrealized Gains and Losses Related to Equity Securities (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Investments, Debt and Equity Securities [Abstract]        
Unrealized gains (losses) recognized during the reported period on equity securities still held at the end of the reported period $ 980 $ (205) $ 3,885 $ 298