EMPLOYEE BENEFITS AND STOCK BASED COMPENSATION (Summary of Nonvested Stock Activity) (Details)	12 Months Ended
	Dec. 31, 2017 $ / shares shares
Restricted Stock
Number of Shares of RSAs
Beginning balance (in shares) | shares	371,438
Granted (in shares) | shares	125,738
Net settle for taxes (in shares) | shares	(47,187)
Vested (in shares) | shares	(110,057)
Forfeited (in shares) | shares	(13,196)
Ending balance (in shares) | shares	326,736
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	$ 23.70
Weighted Average Grant Date Fair Value, Granted (in dollars per share) | $ / shares	35.89
Weighted Average Grant Date Fair Value, Net settle for taxes (in dollars per share) | $ / shares	37.80
Weighted Average Grant Date Fair Value, Vested (in dollars per share) | $ / shares	24.93
Weighted Average Grant Date Fair Value, Forfeited (in dollars per share) | $ / shares	26.55
Weighted Average Grant Date Fair Value, Ending balance (in dollars per share) | $ / shares	$ 27.68
Performance Stock
Number of Shares of RSAs
Beginning balance (in shares) | shares	145,757
Granted (in shares) | shares	37,249
Vested (in shares) | shares	0
Forfeited (in shares) | shares	(48,656)
Ending balance (in shares) | shares	134,350
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	$ 21.05
Weighted Average Grant Date Fair Value, Granted (in dollars per share) | $ / shares	39.31
Weighted Average Grant Date Fair Value, Vested (in dollars per share) | $ / shares	0.00
Weighted Average Grant Date Fair Value, Forfeited (in dollars per share) | $ / shares	24.19
Weighted Average Grant Date Fair Value, Ending balance (in dollars per share) | $ / shares	$ 24.98