EMPLOYEE BENEFIT PLANS - Schedule of Amounts in Accumulated Other Comprehensive Income That Have Not Yet Been Recognized as Components of Net Periodic Benefit Cost (Details) - Postretirement Benefits - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net prior service cost	$ 1,075	$ 1,159	$ 1,242
Net actuarial (gain)/loss	(690)	(812)	615
Total recognized in accumulated other comprehensive income	$ 385	$ 347	$ 1,857