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RETIREMENT PLAN BENEFIT LIABILITY - Components of Net Periodic Pension Cost (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 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 $ 237 $ 362 $ 475 $ 723
Interest cost 725 346 1,449 692
Amortization of prior service cost 204 279 408 559
Amortization of loss 120 372 240 744
Total net periodic benefit cost $ 1,286 $ 1,359 $ 2,572 $ 2,718