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Note 6 - Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Income tax at federal statutory rate $ 159,498 $ 196,326 $ 269,088
State tax, net of federal effect 21,051 28,997 41,624
Federal 1341 Claim 0 (14,616) 0
Other, net 8,081 (4,107) 1,310
Total tax expense/(benefit) $ 188,630 $ 206,600 $ 312,022