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LEASE COMMITMENTS AND CONTINGENCIES - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2021
Dec. 31, 2020
Leases [Abstract]      
Remaining lease term, in years   4 years  
Option to extend, in years 5 years 5 years  
Lease cost $ 0.8 $ 2.5  
Material contingencies $ 0.0 $ 0.0 $ 0.0