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Note 18 - Post-retirement Benefits (Details Textual) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Defined Benefit Plan, Plan Assets, Contributions by Employer $ 1.4 $ 1.3 $ 2.8 $ 2.6