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STOCK BASED COMPENSATION - Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Apr. 12, 2017
Apr. 09, 2013
Apr. 08, 2008
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-Based Compensation, Shares Authorized Under Equity Incentive Plans           1,125,000
Employee Stock Ownership Plan (ESOP), Compensation Expense $ 4,200,000 $ 5,600,000 $ 5,700,000      
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense $ 1,100,000 $ 1,500,000 $ 2,200,000      
Number of stock option grants 0 0 0      
Modifications of stock option 0 0 0      
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options $ 0          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 684,926          
2013 Plan Member            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant         435,867  
2017 Plan Member            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-Based Compensation, Shares Authorized Under Equity Incentive Plans       1,000,000    
Restricted Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options $ 135,000          
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 1 year 3 days          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Intrinsic Value $ 737,000 $ 726,000 $ 1,200,000      
Vested 15,600          
Performance Shares [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options $ 3,400,000          
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 1 year 6 months 18 days          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Intrinsic Value $ 5,700,000 $ 6,600,000 $ 5,100,000      
Vested 126,672 137,472 112,055