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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		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 1,344	$ 1,333	$ 4,325	$ 4,019
Expected return on plan assets	(2,856)	(3,185)	(9,182)	(9,600)
Amortization of unrecognized loss	490	911	1,574	2,746
Net periodic pension cost (income)	$ (1,022)	$ (941)	$ (3,283)	$ (2,835)

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

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