Supplemental Balance Sheet and Income Statement - Items reclassified to net income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Supplemental Balance Sheet, Income Statement and Cash Flow Information
General and administrative expenses	$ 71,375	$ 82,726	$ 143,135	$ 151,232
Total income (loss) before income taxes	14,882	20,872	36,028	93,058
Tax expense (benefit)	16,405	23,077	33,289	38,084
Net income (loss)	$ (1,523)	(2,205)	2,739	54,974
Reclassification adjustment for (gains)/ losses included in net income (loss)
Supplemental Balance Sheet, Income Statement and Cash Flow Information
General and administrative expenses		52	35	105
Total income (loss) before income taxes		(52)	(35)	(105)
Tax expense (benefit)		(12)	(8)	(24)
Net income (loss)		$ (40)	$ (27)	$ (81)