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STOCK COMPENSATION - Stock Compensation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Stock compensation expense $ 1,326 $ 907
Equity based stock option expense    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Stock compensation expense 146 122
Restricted and performance-based stock awards expense    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Stock compensation expense 1,174 778
Equity based awards    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Stock compensation expense 1,320 900
Liability based stock option expense    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Stock compensation expense $ 6 $ 7