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STOCK BASED COMPENSATION (Additional Information) (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
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 $ 5,600,000 $ 5,700,000 $ 4,200,000      
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense $ 1,500,000 2,200,000 1,700,000      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 839,459          
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 $ 24,000          
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 5 months 23 days          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Intrinsic Value $ 726,000 1,200,000 1,100,000      
Vested 14,800          
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 $ 5,500,000          
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 1 year 7 months 28 days          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Intrinsic Value $ 6,600,000 $ 5,100,000 $ 4,100,000      
Vested 137,472 112,055 95,600