PENSION AND OTHER POSTRETIREMENT PLANS (Components of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net pension expense:
Net (gain)/loss	$ (269)	$ (97)	$ 151
Pension Plans, Defined Benefit [Member]
Net pension expense:
Service cost	0	0	0
Interest cost	93	104	105
Expected return on plan assets	(138)	(143)	(139)
Recognized net actuarial loss	193	185	135
Settlement cost	224	0	128
Net pension expense	372	146	229
Net (gain)/loss	(296)	(36)	122
Amortization of net loss	(193)	(185)	(135)
Total recognized in other comprehensive income	(489)	(221)	(13)
Total recognized in net pension expense and other comprehensive income	(117)	(75)	216
Supplemental Employee Retirement Plans, Defined Benefit [Member]
Net pension expense:
Service cost	0	0	0
Interest cost	34	40	45
Expected return on plan assets	(61)	(63)	(70)
Recognized net actuarial loss	73	80	80
Settlement cost	0	0	0
Net pension expense	46	57	55
Net (gain)/loss	27	(61)	29
Amortization of net loss	(73)	(80)	(80)
Total recognized in other comprehensive income	(46)	(141)	(51)
Total recognized in net pension expense and other comprehensive income	$ 0	$ (84)	$ 4