STOCK-BASED COMPENSATION PLANS (Restricted Stock and Restricted Stock Units Activity) (Details) - Restricted Stock and Restricted Stock Units [Member] - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Unvested Shares: [Roll Forward]
Unvested, Beginning Balance	231,562	195,106	164,492
Granted	177,775	155,183	90,181
Vested	(104,297)	(109,416)	(56,307)
Forfeited	(14,321)	(9,311)	(3,260)
Unvested, Ending Balance	290,719	231,562	195,106
Weighted Average Grant-Date Fair Value (in dollars per share):
Unvested, Beginning Balance	$ 42.33	$ 32.83	$ 26.94
Granted	41.74	45.59	40.07
Vested	41.47	30.28	24.81
Forfeited	42.54	39.07	31.00
Unvested, Ending Balance	$ 42.26	$ 42.33	$ 32.83