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REVENUE - Narrative (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Largest Customer | Customer Concentration Risk | Revenue from Contract with Customer Benchmark        
Disaggregation of Revenue [Line Items]        
Concentration risk percentage 20.40% 26.30% 19.40% 18.80%