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Components Of Net Periodic Pension Cost (Income) (Details) - United Kingdom Subsidiary - UK Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 5,693	$ 5,326	$ 6,401
Expected return on plan assets	(12,088)	(12,726)	(12,023)
Amortization of unrecognized loss	2,073	3,642	2,389
Net periodic pension cost (income)	$ (4,322)	$ (3,758)	$ (3,233)

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