EMPLOYEE BENEFIT PLANS - Schedule of Net Pension Cost (Credit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 77	$ 90
Interest cost	2,323	2,303	2,438
Settlement cost	221	0	0
Expected return on plan assets	(2,378)	(3,720)	(3,110)
Amortization of prior service cost	32	0	0
Amortization of net actuarial (gain) loss	0	(78)	71
Net pension cost (credit)	$ 198	$ (1,418)	$ (511)