Income Taxes - Components of net deferred taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Deferred tax assets:
Net operating loss carryforwards	$ 3,934,828	$ 3,870,614
Tax credit and other attribute carryforwards	76,314	86,188
Disallowed interest carryforward	16,642	33,907
Property, plant and equipment	11,798
Other	93,287	88,644
Subtotal	4,132,869	4,079,353
Valuation allowance	(3,944,634)	(3,825,551)
Deferred tax assets	188,235	253,802
Deferred tax liabilities:
Property, plant and equipment		34,089
Other	6,137	5,903
Deferred tax liability	6,137	39,992
Net deferred tax assets (liabilities)	182,098	213,810
Balance Sheet Summary :
Net noncurrent deferred tax asset	189,224	216,296
Net noncurrent deferred tax liability	(7,126)	(2,486)
Net deferred tax assets (liabilities)	$ 182,098	$ 213,810