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SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN - Components of Net Periodic Pension Cost (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 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
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
Supplemental Executive Retirement Plan [Member]    
Components of net periodic pension cost [Abstract]    
Service cost $ 238 $ 361
Interest cost 724 346
Amortization of prior service cost 204 280
Amortization of loss 120 372
Total net periodic benefit cost $ 1,286 $ 1,359