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Investments - Summary of Amortized Cost, Gross Unrealized Gains and Losses, and Estimated Fair Value of Equity Securities (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]    
Cost $ 36,272 $ 46,276
Gross Unrealized Gain 2,078 6,335
Gross Unrealized Loss (3,767) (871)
Equity securities $ 34,583 $ 51,740