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Note 18 - Post-retirement Benefits - Net Periodic Benefit Cost (Details) - Pension Plan [Member] - UNITED KINGDOM - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Amortization of prior service credit	$ 61	$ 61
Interest cost	(1,054)	(837)
Expected return on plan assets	1,428	1,181
Total	$ 435	$ 405

X

- Definition

Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan.

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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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