Retirement Benefits (Schedule of Estimated Remaining Cash Contributions) (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated future employer contributions in the current fiscal year	$ 2,328
United Kingdom | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated future employer contributions in the current fiscal year	943
Germany [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated future employer contributions in the current fiscal year	$ 832