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Retirement Benefit Plans (Fair Value Hierarchy) (Details) - Pension Plan - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of each major category of U.S. plan assets | $ 28,251 | $ 30,128 | $ 34,485
Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of each major category of U.S. plan assets | 28,251 | 30,128 |
Level 1 | Fixed income securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of each major category of U.S. plan assets | 28,028 | 29,866 |
Level 1 | Money market funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of each major category of U.S. plan assets | 223 | 181 |
Level 1 | Cash equivalents |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of each major category of U.S. plan assets | $ 0 | $ 81 |

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