Income Taxes - Uncertain tax positions (Details) - USD ($) $ in Thousands		12 Months Ended
	Dec. 18, 2023	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Change in unrecognized tax benefits
Balance as of January 1		$ 23,324	$ 34,016	$ 45,452
Additions for tax positions of prior years		2,745	322	2,207
Reductions for tax positions of prior years			(1,046)	(256)
Settlements		(8,781)	(9,968)	(13,387)
Balance as of December 31		17,288	23,324	34,016
Unrecognized tax benefits that would impact the worldwide effective tax rate if realized		17,300
Amount of potential impact		15,900
Interest and penalties on unrecognized tax benefits		9,500	8,200	11,100
Accruals for estimated interest and penalties related to uncertain tax positions		1,300	$ (2,900)	$ (6,000)
Interest and penalties accrued		$ 0
Bermuda national statutory tax rate, percent		15.00%	0.00%	0.00%
Deferred tax asset, net operating losses		$ 206,900
Valuation allowance		3,944,634	$ 3,825,551
Bermuda
Change in unrecognized tax benefits
Bermuda national statutory tax rate, percent	15.00%
Valuation allowance		$ 206,900