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Pension and Postretirement Benefits (Details Textual) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 USD ($) plan | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined contribution plan expense | $ 23,600 | $ 21,900 | $ 19,900
Postretirement Medical Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rate | 5.57% | 5.83% | 2.83%
Company contributions | $ 1,600 | $ 2,400 | $ 3,300
Assumed rate of increase in medical costs | 7.00% | 7.25% | 7.50%
Minimum medical cost rate to be acheived | 5.00% |  |
United States | Pension Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rate | 5.41% | 5.73% | 3.00%
Long-term rate of return on assets | 6.00% | 5.75% | 6.00%
Company contributions | $ 3,143 | $ 639 |
United States | Equity Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets, target allocation (as a percent) | 34.00% |  |
United States | Fixed Income |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets, target allocation (as a percent) | 65.00% |  |
United States | Fixed Income | Pension Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets, target allocation (as a percent) | 65.00% | 65.00% |
Plan assets, actual allocation (as a percent) | 62.00% | 65.00% |
Foreign Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rate |  |  | 1.71%
Long-term rate of return on assets |  |  | 2.37%
Foreign Plan | Pension Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rate | 4.22% | 4.46% |
Long-term rate of return on assets | 3.97% | 2.43% |
Company contributions | $ 10,221 | $ 15,657 |
Estimated contributions in the next year | $ 2,000 |  |
Number of plans Non-US Assets | plan | 2 |  |
Foreign Plan | Fixed Income | Pension Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets, target allocation (as a percent) | 51.00% | 50.00% |
Plan assets, actual allocation (as a percent) | 51.00% | 50.00% |
Foreign Plan | U.K. , the Netherlands and Canadian Plan Assets | Pension Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets, actual allocation (as a percent) | 88.00% |  |

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