EMPLOYEE BENEFIT PLANS (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) pension_plan	Sep. 30, 2019 USD ($)
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			$ 2,900
Service cost	$ 0	$ 0	0	$ 0
Interest cost	677	799	2,029	2,398
Expected return on plan assets	(876)	(777)	(2,628)	(2,330)
Amortization of losses	215	112	646	337
Net periodic benefit cost	16	134	47	405
Postretirement
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	1	5	4
Interest cost	13	13	38	40
Expected return on plan assets	0	0	0	0
Amortization of losses	2	0	6	0
Net periodic benefit cost	$ 17	$ 14	$ 49	$ 44