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Note 19 - Post-retirement Benefits - Movements in Fair Value of Plan Assets (Details) - Pension Plan [Member] - UNITED KINGDOM - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Opening balance	$ 212,688	$ 203,630
Actual return on plan assets	(67,536)	16,877	$ 22,742
Exchange differences	(20,776)	(2,245)
Contributions from the sponsoring companies	5,159	4,695
Benefits paid	(5,695)	(10,269)
Ending balance	$ 123,840	$ 212,688	$ 203,630

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.

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Amount of contribution received by defined benefit plan from employer which increases plan assets.

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