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STOCK-BASED COMPENSATION PLANS - Compensation Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total compensation expense $ 2,065 $ 1,472 $ 1,351
Stock options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total compensation expense   12 28
Restricted Stock Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total compensation expense 357 275 300
Performance stock units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total compensation expense 317 225 182
Restricted stock units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total compensation expense $ 1,391 $ 960 $ 841