Supplemental Balance Sheet and Income Statement Information - Items reclassified to net income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Supplemental Balance Sheet and Income Statement Information
General and administrative expenses	$ 61,751	$ 61,730
Total income (loss) before income tax	7,042	84,075
Tax expense (benefit)	16,044	23,015
Net income (loss)	(9,002)	61,060
Reclassification out of Accumulated Other Comprehensive Income
Supplemental Balance Sheet and Income Statement Information
General and administrative expenses	53	52
Total income (loss) before income tax	(53)	(52)
Tax expense (benefit)	(12)	(12)
Net income (loss)	$ (41)	$ (40)