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Note 7 - Segment Reporting - Net Sales by Products and Services (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Net sales | $ 4,209,147 | $ 4,295,834 | $ 4,022,667
Domestic [Member] |  |  |
Net sales | 3,470,966 | 3,599,149 | 3,276,324
International [Member] |  |  |
Net sales | 738,181 | 696,685 | 746,343
Residential Power Products [Member] |  |  |
Net sales | 2,266,912 | 2,433,474 | 2,062,929
Residential Power Products [Member] | Domestic [Member] |  |  |
Net sales | 2,182,105 | 2,352,629 | 1,945,273
Residential Power Products [Member] | International [Member] |  |  |
Net sales | 84,807 | 80,845 | 117,656
Commercial and Industrial Power Products [Member] |  |  |
Net sales | 1,457,385 | 1,389,469 | 1,494,799
Commercial and Industrial Power Products [Member] | Domestic [Member] |  |  |
Net sales | 863,762 | 828,586 | 916,118
Commercial and Industrial Power Products [Member] | International [Member] |  |  |
Net sales | 593,623 | 560,883 | 578,681
Other Products and Services [Member] |  |  |
Net sales | 484,850 | 472,891 | 464,939
Other Products and Services [Member] | Domestic [Member] |  |  |
Net sales | 425,099 | 417,934 | 414,933
Other Products and Services [Member] | International [Member] |  |  |
Net sales | $ 59,751 | $ 54,957 | $ 50,006

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