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Employee Benefit Plans Employee Benefit Plans 7 (Details) - Pension Benefits - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Employee benefit plans |  |  |
Fair Value | $ 192,477 | $ 162,529 | $ 173,648
Unfunded Commitments | 0 | 0 |
Cash equivalents |  |  |
Employee benefit plans |  |  |
Fair Value | 600 | 590 |
Unfunded Commitments | 0 | 0 |
Fixed income fund |  |  |
Employee benefit plans |  |  |
Fair Value | 74,123 | 70,642 |
Unfunded Commitments | 0 | 0 |
U.S. small/mid cap funds |  |  |
Employee benefit plans |  |  |
Fair Value | 17,865 | 22,313 |
Unfunded Commitments | 0 | 0 |
U.S. large cap funds |  |  |
Employee benefit plans |  |  |
Fair Value | 47,132 | 46,133 |
Unfunded Commitments | 0 | 0 |
International funds |  |  |
Employee benefit plans |  |  |
Fair Value | 43,778 | 15,548 |
Unfunded Commitments | 0 | 0 |
Total equity funds |  |  |
Employee benefit plans |  |  |
Fair Value | 108,775 | 83,994 |
Unfunded Commitments | 0 |  |
Real estate funds |  |  |
Employee benefit plans |  |  |
Fair Value | 8,979 | 7,303 |
Unfunded Commitments | $ 0 | $ 0 |

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