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Note 19 - Post-retirement Benefits - Actual Return on Plan Assets (Details) - Pension Plan [Member] - UNITED KINGDOM - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Expected return on plan assets	$ 5,499	$ 6,064	$ 6,425
Actuarial gain on assets	11,378	16,678	18,801
Actual return on plan assets	$ 16,877	$ 22,742	$ 25,226

X

- Definition

Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
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X

- 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
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-Topic 715
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-Section 45
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 6
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X

- Definition

The amount of actuarial gain (loss) on plan assets under defined benefit plan.

+ References

No definition available.

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