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Employee Benefit Plans - Schedule of Fair Value Measured by Net Asset Value (Details) - Pension Benefits - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Employee benefit plans |  |  |
Fair Value | $ 186,906 | $ 233,524 | $ 213,147
Unfunded Commitments | 0 | 0 |
Cash equivalents |  |  |
Employee benefit plans |  |  |
Fair Value | 801 | 637 |
Unfunded Commitments | 0 | 0 |
Fixed income fund |  |  |
Employee benefit plans |  |  |
Fair Value | 73,863 | 87,760 |
Unfunded Commitments | 0 | 0 |
Total equity funds |  |  |
Employee benefit plans |  |  |
Fair Value | 103,947 | 131,555 |
Unfunded Commitments | 0 |  |
U.S. small/mid cap funds |  |  |
Employee benefit plans |  |  |
Fair Value | 17,136 | 22,143 |
Unfunded Commitments | 0 | 0 |
U.S. large cap funds |  |  |
Employee benefit plans |  |  |
Fair Value | 44,572 | 58,451 |
Unfunded Commitments | 0 | 0 |
International funds |  |  |
Employee benefit plans |  |  |
Fair Value | 42,239 | 50,961 |
Unfunded Commitments | 0 | 0 |
Real estate funds |  |  |
Employee benefit plans |  |  |
Fair Value | 8,295 | 13,572 |
Unfunded Commitments | $ 0 | $ 0 |

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