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RETIREMENT PLANS AND RELATED POST RETIREMENT BENEFITS - Narrative (Details) | 12 Months Ended
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Dec. 31, 2022 USD ($) retirement_plan | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Defined Benefit Plan Disclosure |  |  |
Number of non-qualified supplemental retirement defined benefit plans | retirement_plan | 2 |  |
Accumulated benefit obligation of the plans | $ 20,500,000 | $ 28,500,000 |
Fair value of plan assets at period end | 0 | 0 |
Unrecognized prior service costs | 1,000,000 |  |
Unrecognized prior service costs, net | 1,600,000 |  |
Unrecognized prior service costs, tax | 600,000 |  |
Unrecognized actuarial losses | 800,000 |  |
Unrecognized actuarial gain (losses), net | 2,400,000 |  |
Unrecognized actuarial losses, tax | 1,600,000 |  |
Overfunded asset (unfunded liability) | $ 100,000 | (300,000) |
Percentage of fund | 98.00% |  |
Contribution of employer | $ 500,000 | 400,000 | $ 500,000
Total employer contribution | 1.00% |  |
SERP |  |  |
Defined Benefit Plan Disclosure |  |  |
Actuarial gain | $ 4,917,000 | 1,838,000 |
Increase in the discount rate | 2.25% |  |
Current accrued pension liability | $ 300,000 |  |
Long-term accrued pension liability | 25,900,000 |  |
Expected future payments in 2023 (less than for SERP Medical) | 300,000 |  |
Expected future payments in 2024 (less than for SERP Medical) | 600,000 |  |
Expected future payments in 2025 (less than for SERP Medical) | 600,000 |  |
Expected future payments in 2026 (less than for SERP Medical) | 600,000 |  |
Expected future payments in 2027 (less than for SERP Medical) | 1,000,000 |  |
Expected future payments in next five years after that (less than for SERP Medical) | 10,500,000 |  |
SERP Medical |  |  |
Defined Benefit Plan Disclosure |  |  |
Current accrued pension liability | 100,000 |  |
Long-term accrued pension liability | 700,000 |  |
Change in retirement benefit obligation | $ 800,000 | $ 1,100,000 |

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