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PENSION PLAN - Plan Assets at Fair Value (Details) - Pension Plan - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | $ 11,591 | $ 7,096 | $ 6,165
Level I |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 8,230 | 5,677 |
Level II |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 0 | 0 |
Level III |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 3,361 | 1,419 |
Cash |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 348 | 639 |
Cash | Level I |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 348 | 639 |
Cash | Level II |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 0 | 0 |
Cash | Level III |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 0 | 0 |
Fixed income |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 2,898 | 1,419 |
Fixed income | Level I |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 2,898 | 1,419 |
Fixed income | Level II |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 0 | 0 |
Fixed income | Level III |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 0 | 0 |
Alternative investments |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 3,361 | 1,348 |
Alternative investments | Level I |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 0 | 0 |
Alternative investments | Level II |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 0 | 0 |
Alternative investments | Level III |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 3,361 | 1,348 |
Domestic equities |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 2,898 | 1,916 |
Domestic equities | Level I |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 2,898 | 1,916 |
Domestic equities | Level II |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 0 | 0 |
Domestic equities | Level III |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 0 | 0 |
Foreign equities |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 2,086 | 1,703 |
Foreign equities | Level I |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 2,086 | 1,703 |
Foreign equities | Level II |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | 0 | 0 |
Foreign equities | Level III |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value | $ 0 | 0 |
Real estate investment trusts |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value |  | 71 |
Real estate investment trusts | Level I |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value |  | 0 |
Real estate investment trusts | Level II |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value |  | 0 |
Real estate investment trusts | Level III |  |  |
Plan's assets at fair value by level, within the fair value hierarchy |  |  |
Total assets at fair value |  | $ 71 |

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