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Employee Benefit Plans 7 (Details) - Pension Benefits - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Employee benefit plans |  |  |
Fair Value | $ 233,524 | $ 213,147 | $ 192,477
Unfunded Commitments | 0 | 0 |
Cash equivalents |  |  |
Employee benefit plans |  |  |
Fair Value | 637 | 589 |
Unfunded Commitments | 0 | 0 |
Fixed income fund |  |  |
Employee benefit plans |  |  |
Fair Value | 87,760 | 76,221 |
Unfunded Commitments | 0 | 0 |
Total equity funds |  |  |
Employee benefit plans |  |  |
Fair Value | 131,555 | 126,002 |
Unfunded Commitments | 0 |  |
U.S. small/mid cap funds |  |  |
Employee benefit plans |  |  |
Fair Value | 58,451 | 21,837 |
Unfunded Commitments | 0 | 0 |
U.S. large cap funds |  |  |
Employee benefit plans |  |  |
Fair Value | 22,143 | 53,677 |
Unfunded Commitments | 0 | 0 |
International funds |  |  |
Employee benefit plans |  |  |
Fair Value | 50,961 | 50,488 |
Unfunded Commitments | 0 | 0 |
Real estate funds |  |  |
Employee benefit plans |  |  |
Fair Value | 13,572 | 10,335 |
Unfunded Commitments | $ 0 | $ 0 |

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