EMPLOYEE BENEFIT PLANS (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) pension_plan	Jun. 30, 2019 USD ($)
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			$ 1,100
Minimum annual pension contribution	$ 3,600		3,600
Service cost	0	$ 0	0	$ 0
Interest cost	677	799	1,353	1,599
Expected return on plan assets	(876)	(777)	(1,752)	(1,554)
Amortization of losses	215	112	431	224
Net periodic benefit cost	16	134	32	269
Postretirement
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	1	3	3
Interest cost	13	13	26	27
Expected return on plan assets	0	0	0	0
Amortization of losses	2	0	4	0
Net periodic benefit cost	$ 17	$ 14	$ 33	$ 30