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Note 8 - Employee Benefit Plans - Defined Benefit Plan Activity (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Actuarial loss (gain)(3) |  | $ 808,000 |  | $ (842,000)
Fair value of plan assets at beginning of year |  | 39,208,000 |  |
Fair value of plan assets at end of year |  | 40,363,000 |  | 39,208,000
Pension Plan [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Projected benefit obligation at beginning of year |  | 26,060,000 |  | 25,750,000
Service cost (1) | [1] | 991,000 |  | 1,042,000
Interest cost (2) | [2] | 1,294,000 |  | 1,206,000
Actuarial loss (gain)(3) | [3] | 808,000 |  | (842,000)
Benefits paid |  | (3,673,000) |  | (1,096,000)
Settlement gain |  | (33,000) |  |
Projected benefit obligation at end of year |  | 25,447,000 |  | 26,060,000
Fair value of plan assets at beginning of year |  | 39,208,000 |  | 32,509,000
Actual return on plan assets |  | 4,828,000 |  | 4,795,000
Employer contribution |  | 0 |  | 3,000,000
Benefits paid |  | (3,673,000) |  | (1,096,000)
Fair value of plan assets at end of year |  | 40,363,000 |  | 39,208,000
Funded status at the end of the year |  | 14,916,000 |  | 13,148,000
Deferred tax liabilities |  | (3,132,000) |  | (2,761,000)
Other assets |  | 14,916,000 |  | 13,148,000
Total amounts recognized in the Consolidated Balance Sheet |  | 11,784,000 |  | 10,387,000
Unrecognized net actuarial gain |  | 1,633,000 |  | 415,000
Deferred tax liability |  | (343,000) |  | (87,000)
Amount recognized |  | 1,290,000 |  | 328,000
Benefit obligation |  | (25,447,000) |  | (26,060,000)
Fair value of assets |  | 40,363,000 |  | 39,208,000
Unrecognized net actuarial (gain) loss |  | (1,633,000) |  | (415,000)
Deferred tax liability |  | (2,789,000) |  | (2,674,000)
Prepaid pension cost included in other assets |  | 10,494,000 |  | 10,059,000
Expected return on plan assets | [2] | (2,768,000) |  | (2,431,000)
Recognized net actuarial gain due to settlement |  | (68,000) | [2] | 0
Recognized net actuarial loss | [2] | 0 |  | 134,000
Net periodic benefit |  | (551,000) |  | (49,000)
Net gain |  | (1,217,000) |  | (3,339,000)
Deferred income tax expense |  | 255,000 |  | 701,000
Total recognized |  | (962,000) |  | (2,638,000)
Total recognized in net periodic benefit and other comprehensive income |  | $ (1,768,000) |  | $ (3,388,000)
Discount rate used for net periodic pension cost |  | 5.50% |  | 4.75%
Discount rate used for disclosure |  | 5.25% |  | 5.50%
Expected return on plan assets |  | 7.50% |  | 7.50%
Rate of compensation increase |  | 4.00% |  | 4.00%
[1] | Cost is included in salaries and employee benefits expense on the Consolidated Statements of Income.
[2] | Cost is included in other operating expense on the Consolidated Statements of Income.
[3] | Please see table below for detail on the components of actuarial gain.

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- Definition Amount of asset (liability), recognized in statement of financial position, for overfunded defined benefit pension and other postretirement plans. + References No definition available. + Details
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- Definition Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans, including deferred tax assets. + References No definition available. + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset (liability) attributable to deductible temporary differences from pension and other postretirement benefits. + References No definition available. + Details
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- Definition Amount of liability (asset), recognized in statement of financial position, for defined benefit pension plan. Excludes other postretirement benefit plan. + References No definition available. + Details
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- Definition Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (j) -SubTopic 10 -Topic 220 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (k) -SubTopic 10 -Topic 220 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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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 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 5 -Subparagraph (j)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: 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 5 -Subparagraph (j)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: 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 5 -Subparagraph (j)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: 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 3: 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 5 -Subparagraph (j)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: 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 Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 60 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480266/715-60-50-4 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(6) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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