STOCK INCENTIVE AND STOCK OPTION PLANS (Restricted Stock Activity) (Details) - $ / shares	1 Months Ended			12 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Granted, Shares	27,024	24,750	19,500
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested at beginning of year, Shares				1,075,543	1,005,892	716,156
Granted, Shares				297,251	273,269	349,900
Forfeited, Shares				(17,253)	(43,772)	(53,050)
Vested, Shares				(7,113)	(159,846)	(7,114)
Nonvested at end of year, Shares				1,348,428	1,075,543	1,005,892
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Nonvested at beginning of year, Weighted-Average Grant Date Fair Value				$ 19.63	$ 18.78	$ 15.86
Granted, Weighted-Average Grant Date Fair Value				22.45	23.16	23.17
Forfeited, Weighted-Average Grant Date Fair Value				20.06	19.28	18.18
Vested, Weighted-Average Grant Date Fair Value				16.38	22.48	13.00
Nonvested at end of year, Weighted-Average Grant Date Fair Value				$ 20.27	$ 19.63	$ 18.78