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Note 11 - Pension and Postretirement Benefit Plans - Significant Weighted Average Assumptions Used in Measurement of Pension and Postretirement Benefit Obligations (Details) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
UNITED STATES | Pension Plan [Member] |  |  |
Benefit obligations: |  |  |
Discount rate | 5.58% | 5.12% | 5.47%
Net periodic benefit cost: |  |  |
Discount rate | 5.07% | 5.36% | 2.29%
Expected return on plan assets | 5.75% | 6.00% | 4.00%
UNITED STATES | Other Postretirement Benefits Plan [Member] |  |  |
Benefit obligations: |  |  |
Discount rate | 5.62% | 5.19% | 5.54%
Net periodic benefit cost: |  |  |
Discount rate | 5.18% | 5.48% | 2.84%
Foreign Plan [Member] | Pension Plan [Member] |  |  |
Benefit obligations: |  |  |
Discount rate | 4.56% | 4.33% | 4.74%
Net periodic benefit cost: |  |  |
Discount rate | 4.74% | 4.98% | 2.20%
Rate of compensation increase | 3.75% | 3.68% | 3.11%
Expected return on plan assets | 5.39% | 5.13% | 3.64%
Foreign Plan [Member] | Other Postretirement Benefits Plan [Member] |  |  |
Benefit obligations: |  |  |
Discount rate | 4.99% | 5.01% | 5.44%
Net periodic benefit cost: |  |  |
Discount rate | 5.32% | 5.64% | 3.34%
Initial health care cost trend rate | 2.91% | 2.76% | 2.48%
Ultimate health care cost trend rate | 4.17% | 4.19% | 4.09%
Year ultimate reached | 2032 | 2032 | 2032

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- Definition The initial trend rate for health care costs. + References No definition available. + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-8 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Ultimate trend rate for health care cost for defined benefit postretirement plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (l) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Year ultimate health care cost trend rate is expected to be reached, in YYYY format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (l) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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