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Fair Value Measurement - Additional Information (Detail) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 | Dec. 31, 2023
Fair Value Measurement [Line Items] |  |
Carrying value of debt | $ 313,067 | $ 350,682
Restricted investments | 21,000 | 20,800
Fixed-rate Borrowings [Member] |  |
Fair Value Measurement [Line Items] |  |
Increase (decrease) in fair value of debt | 2,100 | 1,400
Carrying value of debt | $ 313,100 | $ 350,700

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