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STOCK-BASED EMPLOYEE COMPENSATION - Summary of Hurdle Price Activity of PSU's (Details) - Performance Stock Units [Member]
9 Months Ended
Sep. 30, 2020
$ / shares
Hurdle Price - $7.24 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Hurdle Price $ 7.24
Percentage of PSU's Vested 25.00%
Hurdle Price - $8.83 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Hurdle Price $ 8.83
Percentage of PSU's Vested 25.00%
Hurdle Price - $10.41 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Hurdle Price $ 10.41
Percentage of PSU's Vested 25.00%
Hurdle Price - $12.00 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Hurdle Price $ 12.00
Percentage of PSU's Vested 25.00%