EMPLOYEE BENEFIT PLANS (Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 327	$ 371	$ 980	$ 1,113
Interest cost	869	830	2,606	2,489
Expected return on plan assets	(1,008)	(1,007)	(3,023)	(3,020)
Amortization of prior service cost	0	3	0	10
Amortization of losses (gains)	632	950	1,893	2,799
Net periodic benefit cost	820	1,147	2,456	3,391
Postretirement
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	3	5	8
Interest cost	12	13	36	39
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	0	0	0	0
Amortization of losses (gains)	0	3	(12)	9
Net periodic benefit cost	$ 14	$ 19	$ 29	$ 56