EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Supplemental Employee Retirement Plan [Member]
Net periodic benefit cost
Service cost	$ 84	$ 77	$ 252	$ 231
Interest cost	113	108	339	324
Recognized net actuarial loss	61	55	185	165
Recognized prior service cost		2		6
Net period benefit cost	258	242	776	726
Other Postretirement Benefit Plan
Net periodic benefit cost
Service cost	13	15	39	45
Interest cost	36	38	108	114
Recognized net actuarial loss	10	8	30	24
Recognized prior service cost	(6)	(6)	(18)	(18)
Net period benefit cost	$ 53	$ 55	$ 159	$ 165