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RELATED PARTY TRANSACTIONS (Details) - USD ($)
1 Months Ended 12 Months Ended
Jan. 31, 2016
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
RPC | 255 RC, LLC        
Related Party Transaction [Line Items]        
Joint venture ownership interest percentage 50.00%      
Investment in joint venture $ 2,554,000      
Operating lease agreement term 5 years      
Rent and allocable fixed cost for corporate aircraft   $ 160,000 $ 160,000 $ 159,000
Payable due to related party   1,400,000 1,200,000  
Undistributed earnings represented in retained earnings   521,000    
RPC | Transition Support Services Agreement        
Related Party Transaction [Line Items]        
Aggregate service charges paid   867,000 846,000 $ 865,000
Receivable (payable) due from (to) related party   $ 87,000 $ 49,000  
Chairman of Board and Director        
Related Party Transaction [Line Items]        
Voting power (in percent)   50.00%