Supplemental Balance Sheet and Income Statement Information - Items reclassified to net income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Supplemental Balance Sheet and Income Statement Information
General and administrative expenses	$ 244,147	$ 228,431	$ 213,559
Total income (loss) before income tax	129,124	(245,682)	(488,089)
Tax expense (benefit)	79,220	61,536	55,621
Net income (loss)	49,904	(307,218)	(543,690)
Reclassification out of Accumulated Other Comprehensive Income
Supplemental Balance Sheet and Income Statement Information
General and administrative expenses	209	208	208
Total income (loss) before income tax	(209)	(208)	(208)
Tax expense (benefit)	(48)	(48)	(48)
Net income (loss)	$ (161)	$ (160)	$ (160)