EMPLOYEE BENEFIT PLANS (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) pension_plan	Mar. 31, 2019 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of qualified defined benefit plans | pension_plan	1
Weighted-average expected long-term rate of return on plan assets	5.70%
Pension
Defined Benefit Plan Disclosure [Line Items]
Pension contributions paid	$ 400
Minimum annual pension contribution	3,600
Service cost	0	$ 0
Interest cost	677	800
Expected return on plan assets	(876)	(777)
Amortization of losses	215	112
Net periodic benefit cost (credit)	16	135
Postretirement
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	1
Interest cost	13	14
Expected return on plan assets	0	0
Amortization of losses	2	0
Net periodic benefit cost (credit)	$ 17	$ 15