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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		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 2,552	$ 2,362	$ 4,968	$ 4,738
Expected return on plan assets	(3,268)	(3,213)	(6,362)	(6,445)
Amortization of unrecognized loss	690	648	1,343	1,301
Net periodic pension income	$ (26)	$ (203)	$ (51)	$ (406)

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