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RETIREMENT PLAN BENEFIT LIABILITY - Components of Net Periodic Pension Cost (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Components of net periodic pension cost [Abstract] |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Liability, Defined Benefit Plan, Noncurrent | Liability, Defined Benefit Plan, Noncurrent | Liability, Defined Benefit Plan, Noncurrent | Liability, Defined Benefit Plan, Noncurrent
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Liability, Defined Benefit Plan, Noncurrent | Liability, Defined Benefit Plan, Noncurrent | Liability, Defined Benefit Plan, Noncurrent | Liability, Defined Benefit Plan, Noncurrent
Supplemental Executive Retirement Plan [Member] |  |  |  |
Components of net periodic pension cost [Abstract] |  |  |  |
Service cost | $ 238 | $ 282 | $ 713 | $ 1,005
Interest cost | 725 | 346 | 2,174 | 1,038
Amortization of prior service cost | 203 | 280 | 611 | 839
Amortization of loss | 120 | 372 | 360 | 1,116
Total net periodic benefit cost | $ 1,286 | $ 1,280 | $ 3,858 | $ 3,998

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