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CAPITAL STOCK - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Mar. 09, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Apr. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Quarterly dividend declared (in usd per share)   $ 0.17 $ 0.17 $ 0.17  
Stock repurchase program, authorized amount         $ 10.0
Treasury stock repurchase (in shares)   0 0 0  
Total intrinsic value of stock options exercised   $ 0.1 $ 0.3 $ 0.4  
Unrecognized stock option compensation cost   $ 0.6      
Weighted-average per share grant date fair value of stock options granted   $ 2.26 $ 2.77 $ 4.47  
Preferred stock Series A          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Preferred stock, shares authorized (in shares)   100 100    
Preferred stock, issued (in shares)   0 0    
Preferred stock, outstanding (in shares)   0 0    
Preferred stock Series B          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Preferred stock, shares authorized (in shares)   2,000,000 2,000,000    
Preferred stock, issued (in shares)   0 0    
Preferred stock, outstanding (in shares)   0 0    
Long Term Incentive Plan 2000          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares available for grant (in shares)   780,315      
Share based compensation arrangement by share based payment award, number of shares available for grant increase (decrease)   850,000      
Long Term Incentive Plan 2000 | After Amendment          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares available for grant (in shares)   7,037,500      
Stock Option          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Weighted-average recognition period   1 year 3 months 18 days      
Stock Option | Minimum | Long Term Incentive Plan 2000          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Options expiration period   5 years      
Stock Option | Maximum | Long Term Incentive Plan 2000          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Options expiration period   10 years      
Vesting period   4 years      
Restricted Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Weighted-average recognition period   1 year 3 months 18 days      
Total fair value of restricted stock vested   $ 2.3      
Number of shares vested   322,398 148,414 90,926  
Restricted Shares | Maximum | Long Term Incentive Plan 2000          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period   4 years      
Performance-based awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period   3 years      
Weighted-average recognition period   1 year 6 months      
Number of shares range percentage   150.00%      
Total fair value of restricted stock vested   $ 0.4      
Number of shares vested   62,215 66,761 58,888  
Performance-based awards | Long Term Incentive Plan 2000          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period   3 years      
Performance-based awards | Subsequent Event          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares vested 150,273        
Dividend Declared | Subsequent Event          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Quarterly dividend declared (in usd per share) $ 0.0425