Retirement Benefit Plans (Fair Value Hierarchy) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
U.S.
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 25,156	$ 26,294	$ 33,019
U.S. | U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Non-U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	24,202	25,213
U.S. | Money market
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	954	1,081
Non-U.S. Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,654	4,401	$ 5,772
Non-U.S. Plan | U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,193	1,060
Non-U.S. Plan | Non-U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,720	2,488
Non-U.S. Plan | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,741	853
Non-U.S. Plan | Money market
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0	$ 0