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Note 12 - Employee Retirement Plans (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Liability, Other Postretirement Defined Benefit Plan, Noncurrent | $ 13,616 | $ 13,922 |
Defined Benefit Plan, Benefit Obligation Actuarial Gain (Loss) Due to Pension Plan Termination | 0 |  |
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) | 3,676 |  |
Defined Contribution Plan, Cost | 4,836 | 5,172 | $ 4,999
Non Discretionary Employer Contributions | 0 | 0 | $ 0
Assets for Plan Benefits, Defined Benefit Plan | 10,482 | 9,195 |
Other Noncurrent Liabilities [Member] | Credit Agreement [Member] | Asset Pledged as Collateral [Member] | Corporate Owned Life Insurance Policies [Member] |  |  |
Secured Debt | $ 546 | 750 |
Other Postretirement Benefits Plan [Member] |  |  |
Defined Benefit Plan, Requisite Service Period (Year) | 12 years |  |
Liability, Other Postretirement Defined Benefit Plan, Noncurrent | $ 3,319 | 4,692 |
Liability, Defined Benefit Plan, Current | $ 220 | $ 280 |
Defined Benefit Plan, Coverage Term (Year) | 10 years |  |
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year | 8.50% | 7.50% | 7.50%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate | 4.50% | 4.50% | 4.50%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate | 5.30% | 4.70% |
Defined Benefit Plan, Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate | 2033 | 2032 | 2031
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) | $ 1,154 | $ 360 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | (222) | (196) | $ (132)
Supplemental Non Qualified Plan [Member] |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | 204 | 222 | 378
Liability, Defined Benefit Plan | $ 10,297 | $ 9,229 | $ 9,420

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- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Assumed rate, for next fiscal year, based on annual change in cost of health care cost benefits used to measure expected cost of benefits covered by defined benefit postretirement plan. Factors include, but are not limited to, estimate of health care inflation, change in health care utilization or delivery pattern, technological advances, and change in health status of participant. Excludes factors for change in composition of plan population by age and dependency status. + 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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