EMPLOYEE BENEFIT PLANS (Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 327	$ 371	$ 653	$ 742
Interest cost	869	830	1,737	1,659
Expected return on plan assets	(1,008)	(1,007)	(2,015)	(2,014)
Amortization of prior service cost	0	3	0	6
Amortization of losses (gains)	632	916	1,261	1,849
Net periodic benefit cost	820	1,113	1,636	2,242
Postretirement
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	3	3	6
Interest cost	12	13	24	26
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)	6
Net periodic benefit cost	$ 14	$ 19	$ 15	$ 38