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STOCK COMPENSATION (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
May 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Excess tax benefit related to share-based payment awards $ 153 $ 25    
Share-based compensation, period before change in control 6 months      
Time-based RSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation, award vesting periods 3 years   3 years  
Performance-based RSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation, award vesting periods 3 years 3 years    
RSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation costs $ 2,700 $ 2,200    
Share-based unrecognized compensation costs $ 11,900      
Long-Term Incentive Plan 2012        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares authorized for issuance (in shares)       1,460,000
Shares available for issuance (in shares) 1,239,003      
Long-Term Incentive Plan 2012 | Time-based RSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Equity instruments other than options, granted (in shares) 104,462 114,944    
Long-Term Incentive Plan 2012 | Performance-based RSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Equity instruments other than options, granted (in shares) 60,339 50,787    
Share-based compensation, vesting percentage after change in control 100.00%      
Share-based compensation, vesting period after change in control 24 months      
Long-Term Incentive Plan 2012 | RSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Equity instruments other than options, granted (in shares) 3,778 0