EMPLOYEE BENEFIT PLANS - Components of Net Periodic Benefit Cost (Credit) (Details) - Pension Plans - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Components of Net Periodic Benefit Cost (Credit):
Service cost	$ 83	$ 98
Interest cost	5,192	5,152
Expected return on plan assets	(6,511)	(5,816)
Amortization of:
Prior service cost	133	26
Net actuarial loss (gain)	1,724	1,510
Settlement loss	0	759
Net periodic benefit cost (credit)	$ 621	$ 1,729