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EMPLOYEE STOCK COMPENSATION - Share Based 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 [Line Items]        
Total share-based compensation expense $ 1,106 $ 1,346 $ 3,988 $ 4,392
Related tax benefits 326 396 1,175 1,293
Stock options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total share-based compensation expense 0 0 0 4
Restricted stock awards and units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total share-based compensation expense $ 1,106 $ 1,346 $ 3,988 $ 4,388