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Note 4 - Employee Benefit Plans (Tables) | 9 Months Ended
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Sep. 30, 2025
Table Text Block [Abstract] |
Schedule of Net Periodic Pension Cost | Net periodic pension cost (benefit) for the plans consisted of the following for the three and nine months ended September 30, 2025 and 2024 (in thousands):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Service cost |  | $ | 1,068 |  |  | $ | 914 |  |  | $ | 3,204 |  |  | $ | 2,744 |
Interest cost |  |  | 2,094 |  |  |  | 2,076 |  |  |  | 6,282 |  |  |  | 6,227 |
Expected return on plan assets |  |  | (3,251 | ) |  |  | (3,136 | ) |  |  | (9,753 | ) |  |  | (9,408 | )
Amortization of prior service cost |  |  | 20 |  |  |  | 67 |  |  |  | 60 |  |  |  | 199 |
Amortization of net loss |  |  | 326 |  |  |  | 15 |  |  |  | 978 |  |  |  | 46 |
Net periodic pension cost (benefit) |  | $ | 257 |  |  | $ | (64 | ) |  | $ | 771 |  |  | $ | (192 | )

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (q) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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