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Employee Benefit Plans - Schedule of Fair Value Measured by Net Asset Value (Details) - Pension Benefits - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Employee benefit plans |  |  |
Fair Value | $ 205,305 | $ 186,906 | $ 233,524
Unfunded Commitments | 0 | 0 |
Cash equivalents |  |  |
Employee benefit plans |  |  |
Fair Value | 814 | 801 |
Unfunded Commitments | 0 | 0 |
Fixed income fund |  |  |
Employee benefit plans |  |  |
Fair Value | 80,737 | 73,863 |
Unfunded Commitments | 0 | 0 |
Total equity funds |  |  |
Employee benefit plans |  |  |
Fair Value | 114,309 | 103,947 |
Unfunded Commitments | 0 |  |
U.S. small/mid cap funds |  |  |
Employee benefit plans |  |  |
Fair Value | 19,162 | 17,136 |
Unfunded Commitments | 0 | 0 |
U.S. large cap funds |  |  |
Employee benefit plans |  |  |
Fair Value | 49,770 | 44,572 |
Unfunded Commitments | 0 | 0 |
International funds |  |  |
Employee benefit plans |  |  |
Fair Value | 45,377 | 42,239 |
Unfunded Commitments | 0 | 0 |
Real estate funds |  |  |
Employee benefit plans |  |  |
Fair Value | 9,445 | 8,295 |
Unfunded Commitments | $ 0 | $ 0 |

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