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Retirement Plans (Components Of Net Periodic Pension Benefit Cost (Income)) (Details) - United Kingdom Subsidiary [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 1,452	$ 1,350	$ 2,981	$ 2,686
Expected return on plan assets	(3,082)	(3,223)	(6,326)	(6,415)
Amortization of unrecognized loss	528	922	1,084	1,835
Net periodic pension cost (income)	$ (1,102)	$ (951)	$ (2,261)	$ (1,894)

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Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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