STOCK PLANS (RSUs) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Balance at beginning of year (in shares)	241,496	283,944	288,669
Shares granted	67,800	2,861	69,925
Shares vested (in shares)	(76,996)	(40,035)	(33,698)
Shares forfeited	(10,768)	(5,274)	(40,952)
Balance at end of year (in shares)	221,532	241,496	283,944
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Balance at beginning of year, weighted average grant date fair value (in dollars per share)	$ 49.34	$ 47.38	$ 40.83
Shares granted, weighted average grant date fair value (in dollars per share)	68.82	70.71	67.17
Shares vested, weighted average grant date fair value (in dollars per share)	37.21	36.59	39.20
Shares forfeited, weighted average grant date fair value (in dollars per share)	57.98	52.19	41.70
Balance at end of year, weighted average grant date fair value (in dollars per share)	$ 59.10	$ 49.34	$ 47.38
Equity and Incentive Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares granted	4,915
Equity and Performance Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares granted	62,885