EMPLOYEE BENEFIT PLANS (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) pension_plan	Mar. 31, 2016 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Number of qualified defined benefit plans | pension_plan	1
Weighted-average expected long-term rate of return on plan assets	7.20%
Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 327
Interest cost	815	869
Expected return on plan assets (a)	(945)	(1,008)
Amortization of losses (gains)	116	629
Net periodic benefit (gain) cost	(14)	817
Postretirement
Defined Benefit Plan Disclosure [Line Items]
Service cost	13	2
Interest cost	2	12
Expected return on plan assets (a)	0	0
Amortization of losses (gains)	0	(12)
Net periodic benefit (gain) cost	$ 15	$ 2