Note 13 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
Tax attributes	$ 1,205,863				$ 1,254,928
Depreciation and amortization	3,482,782				3,465,739
Stock-based compensation	3,977				3,432
Deferred compensation	10,920				11,202
Other expenses not currently deductible	11,357				9,505
Deferred tax assets, gross	4,714,899				4,744,806
Valuation allowance	(3,617,562)				(3,608,471)
Deferred tax assets, net of valuation allowance	1,097,337				1,136,335
Undistributed foreign earnings	(781)				(953)
Other expenses currently deductible	(4,153)				(3,184)
Deferred tax liabilities	(4,934)				(4,137)
Net deferred tax assets	1,092,403				1,132,198
Deferred tax assets, net	1,182,883	$ 1,201,090	$ 1,210,033	$ 1,217,840	1,225,565
Deferred tax liabilities	$ (90,480)	$ (91,436)	$ (92,150)	$ (92,764)	$ (93,367)