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Supplemental Balance Sheet and Income Statement Information - Investment income (loss) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Investment income (loss) |  |  |
Interest and dividend income | $ 39,097 | $ 45,900 | $ 15,474
Gains (losses) on marketable securities | (384) | (2,080) | (482)
Investment income (loss) | $ 38,713 | $ 43,820 | $ 14,992

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