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Note 8 - Accrued Retirement Benefits - Net Periodic Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Interest cost	$ 184	$ 203	$ 552	$ 608
Expected return on plan assets	(174)	(165)	(522)	(491)
Amortization of net loss	68	83	204	247
Pension and other postretirement expenses	$ 78	$ 121	$ 234	$ 364

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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