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EMPLOYEE BENEFITS AND STOCK BASED COMPENSATION (Summary of Nonvested Stock Activity) (Details)
12 Months Ended
Dec. 31, 2018
$ / shares
shares
Restricted Stock  
Number of Shares of RSAs  
Beginning balance (in shares) | shares 326,736
Granted (in shares) | shares 212,749
Net settle for taxes (in shares) | shares (38,700)
Vested (in shares) | shares (113,023)
Forfeited (in shares) | shares (12,348)
Ending balance (in shares) | shares 375,414
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]  
Weighted Average Grant Date Fair Value, Beginning balance (in dollars per share) | $ / shares $ 27.68
Weighted Average Grant Date Fair Value, Granted (in dollars per share) | $ / shares 37.36
Weighted Average Grant Date Fair Value, Net settle for taxes (in dollars per share) | $ / shares 40.23
Weighted Average Grant Date Fair Value, Vested (in dollars per share) | $ / shares 29.82
Weighted Average Grant Date Fair Value, Forfeited (in dollars per share) | $ / shares 30.57
Weighted Average Grant Date Fair Value, Ending balance (in dollars per share) | $ / shares $ 32.41
Performance Stock  
Number of Shares of RSAs  
Beginning balance (in shares) | shares 134,350
Granted (in shares) | shares 61,310
Net settle for taxes (in shares) | shares (16,342)
Vested (in shares) | shares (26,977)
Forfeited (in shares) | shares (2,294)
Ending balance (in shares) | shares 150,047
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]  
Weighted Average Grant Date Fair Value, Beginning balance (in dollars per share) | $ / shares $ 24.98
Weighted Average Grant Date Fair Value, Granted (in dollars per share) | $ / shares 34.28
Weighted Average Grant Date Fair Value, Net settle for taxes (in dollars per share) | $ / shares 38.64
Weighted Average Grant Date Fair Value, Vested (in dollars per share) | $ / shares 14.32
Weighted Average Grant Date Fair Value, Forfeited (in dollars per share) | $ / shares 37.19
Weighted Average Grant Date Fair Value, Ending balance (in dollars per share) | $ / shares $ 31.67