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PENSION AND RETIREMENT PLANS (Details) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]          
Settlement loss     $ (2,277,000)    
SERP          
Defined Benefit Plan Disclosure [Line Items]          
Fair value of plan assets $ 10,643,000   10,643,000   $ 9,881,000
Trading (losses) gains related to the SERP assets 425,000 $ (1,076,000) 762,000 $ (2,303,000)  
Participant deferrals net of distributions stated at fair value     16,514,000   $ 14,440,000
Change in fair value of liability unrealized gains 519,000 $ (1,060,000)      
Change in fair value of liability unrealized gains (losses)     817,000 $ (2,325,000)  
Retirement Income Plan | Affiliated Entity | RPC          
Defined Benefit Plan Disclosure [Line Items]          
Settlement loss (188,000)   (2,277,000)    
Amount Receivable as Reimbursement to Cover Funds $ 482,000   $ 482,000