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LEASES - Summary of Operating Lease Cost and Supplemental Cash Flow Information Related to Operating Leases (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Leases [Abstract]    
Operating lease cost $ 615 $ 537
Non-cash activity:    
Right-of-use assets obtained in exchange for lease obligations $ 4,720