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Note 7 - Employee Benefit Plans - Net Periodic Benefit Costs (Details) - Pension Plan And Supplemental Plan [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Interest cost	$ 630	$ 653	$ 1,260	$ 1,499
Expected return on plan assets	(445)	(365)	(890)	(1,053)
Amortization of net actuarial gains	(31)	(4)	(61)	(70)
Net periodic pension cost	$ 154	$ 284	$ 309	$ 376

X

- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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- Definition

Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

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Amount of cost recognized for passage of time related to defined benefit plan.

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