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Retirement Plans (Components Of Net Periodic Pension Benefit (Income) Cost) (Details) - United Kingdom Subsidiary [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 2,573	$ 2,435	$ 7,541	$ 7,173
Expected return on plan assets	(3,296)	(3,311)	(9,658)	(9,756)
Amortization of unrecognized loss	696	668	2,039	1,969
Net periodic pension income	$ (27)	$ (208)	$ (78)	$ (614)

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