EMPLOYEE BENEFIT PLANS (Components of net periodic benefit cost) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Pension Benefits
Net pension expense:
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	22	24	44	47
Expected return on plan assets	(35)	(35)	(69)	(69)
Recognized net actuarial (gain) loss	34	48	66	96
Net pension expense (benefit)	21	37	41	74
SERP Benefits
Net pension expense:
Service cost	0	0	0	0
Interest cost	10	8	19	17
Expected return on plan assets	(15)	(16)	(28)	(31)
Recognized net actuarial (gain) loss	19	19	37	37
Net pension expense (benefit)	$ 14	$ 11	$ 28	$ 23