PENSION AND OTHER BENEFIT PLANS - Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Prior service costs [Abstract]
Maximum percentage of net gain or loss over the greater of the projected benefit obligation or the market-related value of assets without requiring amortization	10.00%
Pension Benefits
Net periodic benefit cost
Service cost	$ 4,433	$ 4,959	$ 5,920
Interest cost	7,561	5,334	5,036
Expected return on plan assets	(16,079)	(19,025)	(18,783)
Plan amendment	0	(556)	0
Amortization of unrecognized net loss	(2,220)	842	3,600
Amortization of prior service cost	820	615	379
Net periodic benefit	(5,485)	(7,831)	(3,848)
Post-retirement Benefits
Net periodic benefit cost
Service cost	0	0	0
Interest cost	92	68	44
Expected return on plan assets	0	0	0
Plan amendment	0	0	0
Amortization of unrecognized net loss	22	23	45
Amortization of prior service cost	(179)	(179)	(179)
Net periodic benefit	$ (65)	$ (88)	$ (90)