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Pension Plan - Plan Assets at Fair Value (Details) - Pension Plan - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | $ 9,283 | $ 11,591 | $ 7,096
Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 8,912 | 11,591 |
Level I | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 7,705 | 8,230 |
Level II | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 0 | 0 |
Level III | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 1,207 | 3,361 |
Net Asset Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 371 |  |
Cash | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 650 | 348 |
Cash | Level I | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 650 | 348 |
Cash | Level II | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 0 | 0 |
Cash | Level III | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 0 | 0 |
Fixed income | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 2,599 | 2,898 |
Fixed income | Level I | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 2,599 | 2,898 |
Fixed income | Level II | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 0 | 0 |
Fixed income | Level III | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 0 | 0 |
Alternative investments | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 1,207 | 3,361 |
Alternative investments | Level I | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 0 | 0 |
Alternative investments | Level II | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 0 | 0 |
Alternative investments | Level III | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 1,207 | 3,361 |
Domestic equities | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 2,414 | 2,898 |
Domestic equities | Level I | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 2,414 | 2,898 |
Domestic equities | Level II | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 0 | 0 |
Domestic equities | Level III | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 0 | 0 |
Foreign equities | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 2,042 | 2,086 |
Foreign equities | Level I | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 2,042 | 2,086 |
Foreign equities | Level II | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 0 | 0 |
Foreign equities | Level III | Estimated Fair Value |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | $ 0 | $ 0 |

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