EQUITY COMPENSATION (Details 3) - Stock Unit Plan for directors - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Assumptions used for estimating fair value of grants outstanding
Number of shares authorized under the plan	900,000
Number of shares accrued in director's accounts	157,672	164,085
Shares available for issuance	677,980	714,978
Units accrued for service and dividends (in shares)	30,595	30,765	34,252
Units redeemed for common stock (in shares)	37,008	21,083	22,908