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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		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Interest cost	$ 618	$ 629	$ 1,855	$ 1,889
Expected return on plan assets	(458)	(444)	(1,373)	(1,334)
Amortization of net actuarial gains	(55)	(30)	(165)	(91)
Net periodic pension cost	$ 105	$ 155	$ 317	$ 464

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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