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STOCK COMPENSATION - Stock Compensation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Stock compensation expense $ 1,201 $ 1,575 $ 3,973 $ 4,321
Equity based stock option expense        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Stock compensation expense 95 143 321 428
Restricted and performance-based stock awards expense        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Stock compensation expense 1,097 1,427 3,633 3,877
Equity based awards        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Stock compensation expense 1,192 1,570 3,954 4,305
Liability based stock option expense        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Stock compensation expense $ 9 $ 5 $ 19 $ 16