PENSION PLAN (Details) - USD ($) $ in Thousands | 12 Months Ended | |
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 |
Amounts recognized in the consolidated balance sheets [Abstract] | | | | |
Noncurrent liabilities | $ (4,015) | $ (4,270) | | |
Amounts recognized in accumulated other comprehensive loss [Abstract] | | | | |
Accumulated loss | (5,648) | (6,428) | $ (6,876) | |
Deferred income taxes | 2,366 | 2,366 | 2,366 | |
Accumulated other comprehensive loss | (3,282) | (4,062) | (4,510) | |
Accumulated benefit obligation | 22,800 | 21,100 | | |
COMPONENTS OF NET PERIODIC BENEFIT COST [Abstract] | | | | |
Service cost | 33 | 28 | 29 | |
Interest cost | 812 | 755 | 840 | |
Expected return on plan assets | (1,011) | (1,104) | (1,058) | |
Recognized net actuarial loss | 691 | 601 | 850 | |
Net periodic benefit cost | 525 | 280 | 661 | |
Amortization of estimated net loss, transition obligation and prior service cost from accumulated other comprehensive income into net periodic benefit cost | 600 | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | $ 18,817 | $ 16,835 | 19,055 | $ 17,548 |
Fair value of total plan assets by major asset category | 100.00% | 100.00% | | |
Weighted-average assumptions used to determine benefit obligations [Abstract] | | | | |
Discount rate | 2.93% | 4.01% | | |
Rate of compensation increase | 2.75% | 2.50% | | |
Weighted-average assumptions used to determine net periodic pension cost [Abstract] | | | | |
Pension contributions | $ 0 | $ 0 | | |
Expected benefit payments for the plan [Abstract] | | | | |
Maximum contribution by employee specified as percentage of compensation | 25.00% | | | |
Additional contribution by employer | 30.00% | | | |
Maximum percentage of compensation contributed by employer as matching contribution | 6.00% | | | |
Compensation expense for the 401(k) plan | $ 100 | 100 | $ 100 | |
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | 18,817 | 16,835 | | |
Significant Other Observable Inputs (Level 2) [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | 0 | 0 | | |
Significant Unobservable Inputs (Level 3) [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | 0 | 0 | | |
Equity Securities [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | $ 6,259 | $ 5,428 | | |
Fair value of total plan assets by major asset category | 33.00% | 32.00% | | |
Equity Securities [Member] | Minimum [Member] | | | | |
Weighted-average assumptions used to determine net periodic pension cost [Abstract] | | | | |
Target plan asset allocations | 30.00% | | | |
Equity Securities [Member] | Maximum [Member] | | | | |
Weighted-average assumptions used to determine net periodic pension cost [Abstract] | | | | |
Target plan asset allocations | 70.00% | | | |
Equity Securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | $ 6,259 | $ 5,428 | | |
Equity Securities [Member] | Significant Other Observable Inputs (Level 2) [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | 0 | 0 | | |
Equity Securities [Member] | Significant Unobservable Inputs (Level 3) [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | 0 | 0 | | |
Fixed Income [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | $ 6,313 | $ 5,852 | | |
Fair value of total plan assets by major asset category | 34.00% | 35.00% | | |
Fixed Income [Member] | Minimum [Member] | | | | |
Weighted-average assumptions used to determine net periodic pension cost [Abstract] | | | | |
Target plan asset allocations | 20.00% | | | |
Fixed Income [Member] | Maximum [Member] | | | | |
Weighted-average assumptions used to determine net periodic pension cost [Abstract] | | | | |
Target plan asset allocations | 60.00% | | | |
Fixed Income [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | $ 6,313 | $ 5,852 | | |
Fixed Income [Member] | Significant Other Observable Inputs (Level 2) [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | 0 | 0 | | |
Fixed Income [Member] | Significant Unobservable Inputs (Level 3) [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | 0 | 0 | | |
International Equities [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | $ 4,165 | $ 3,734 | | |
Fair value of total plan assets by major asset category | 22.00% | 22.00% | | |
International Equities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | $ 4,165 | $ 3,734 | | |
International Equities [Member] | Significant Other Observable Inputs (Level 2) [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | 0 | 0 | | |
International Equities [Member] | Significant Unobservable Inputs (Level 3) [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | 0 | 0 | | |
Real Estate [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | $ 964 | $ 795 | | |
Fair value of total plan assets by major asset category | 5.00% | 5.00% | | |
Real Estate [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | $ 964 | $ 795 | | |
Real Estate [Member] | Significant Other Observable Inputs (Level 2) [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | 0 | 0 | | |
Real Estate [Member] | Significant Unobservable Inputs (Level 3) [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | 0 | 0 | | |
Cash and Equivalents [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | $ 1,116 | $ 1,026 | | |
Fair value of total plan assets by major asset category | 6.00% | 6.00% | | |
Cash and Equivalents [Member] | Minimum [Member] | | | | |
Weighted-average assumptions used to determine net periodic pension cost [Abstract] | | | | |
Target plan asset allocations | 0.00% | | | |
Cash and Equivalents [Member] | Maximum [Member] | | | | |
Weighted-average assumptions used to determine net periodic pension cost [Abstract] | | | | |
Target plan asset allocations | 10.00% | | | |
Cash and Equivalents [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | $ 1,116 | $ 1,026 | | |
Cash and Equivalents [Member] | Significant Other Observable Inputs (Level 2) [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | 0 | 0 | | |
Cash and Equivalents [Member] | Significant Unobservable Inputs (Level 3) [Member] | | | | |
Plan assets using the fair value hierarchy [Abstract] | | | | |
Fair value of plan assets | $ 0 | $ 0 | | |
Pension Plan [Member] | | | | |
Weighted-average assumptions used to determine net periodic pension cost [Abstract] | | | | |
Discount rate | 2.93% | 4.01% | 3.36% | |
Rate of compensation increase | 2.75% | 2.50% | 2.50% | |
Long-term rate of return | 5.75% | 6.25% | 6.00% | |
Expected benefit payments for the plan [Abstract] | | | | |
2020 | $ 1,318 | | | |
2021 | 1,325 | | | |
2022 | 1,346 | | | |
2023 | 1,371 | | | |
2024 | 1,384 | | | |
Years 2025-2029 | $ 6,757 | | | |