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POST-RETIREMENT OBLIGATIONS (Details)
$ in Millions
Sep. 30, 2021
USD ($)
executive
Dec. 31, 2020
USD ($)
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]    
Post retirement obligations, number of former executives | executive 2  
Management | Postretirement Benefits    
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]    
Post retirement liability | $ $ 0.3 $ 0.3