Supplemental Balance Sheet and Income Statement Information - Investment income (loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	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