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STOCK-BASED COMPENSATION PLANS - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation $ 4.2 $ 4.7 $ 3.0
Stock granted (in shares) 0 0 0
Stock options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options, exercises in period, intrinsic value   $ 0.1 $ 0.4
Vested in period, fair value $ 0.8 1.7 2.6
Nonvested total intrinsic value 2.0    
Restricted Stock | Director      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum value of shares per employee $ 0.3 $ 0.7 $ 1.1
2017 Stock Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized (in shares) 1,400,000    
Incentive Stock Plan | Stock options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum grants authorized per each participant (in shares) 350,000    
Incentive Stock Plan | Minimum | Stock options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 1 year