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Note 5 - Employee Benefit Plans (Details Textual) - USD ($) | 2 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 17, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Expected rate of return on plan assets | 7.25% | 7.25% | 6.40% |
Defined Benefit Plan Assumed Long Term Rate Basis Spread |  | 1.00% |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer |  | $ 10,330,000 | $ 22,250,000 |
Defined Contribution Plan, Employer Matching Contribution, Percent of Match |  | 55.00% |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay |  | 5.00% |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer |  | $ 600,000 | 500,000 | $ 10,000
Capital Accumulation 401(K) Plan [Member] |  |  |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer |  | $ 4,500,000 | 4,300,000 | 4,600,000
Defined Contribution Plan, Employer Matching Contribution, Percent of Match |  | 100.00% |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay |  | 6.00% |  |
Pension plans |  |  |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer |  | $ 5,500,000 | 5,500,000 |
Supplemental Employee Retirement Plan [Member] |  |  |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer |  | 4,200,000 | 16,800,000 |
Nonoperating Income (Expense) [Member] |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Except Service cost |  | $ (5,400,000) | $ 600,000 | $ 2,900,000

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2919-114920 + Details
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- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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