Supplemental Balance Sheet and Income Statement - Items reclassified to net income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Supplemental Balance Sheet, Income Statement and Cash Flow Information
General and administrative expenses	$ 71,760	$ 68,506
Total income (loss) before income taxes	21,146	72,186
Tax expense (benefit)	16,884	15,007
Net income (loss)	4,262	57,179
Reclassification adjustment for (gains)/ losses included in net income (loss)
Supplemental Balance Sheet, Income Statement and Cash Flow Information
General and administrative expenses	35	53
Total income (loss) before income taxes	(35)	(53)
Tax expense (benefit)	(8)	(12)
Net income (loss)	$ (27)	$ (41)