EMPLOYEE BENEFIT PLANS - Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Benefits
Employee benefit plans
Service cost	$ 34,847	$ 35,055	$ 36,002
Interest cost	25,596	21,667	25,741
Expected return on plan assets	(45,228)	(39,472)	(33,086)
Net amortization and deferral	5,781	10,003	17,027
Net periodic benefit cost	20,996	27,253	45,684
Other Benefits
Employee benefit plans
Service cost	6,830	6,072	7,945
Interest cost	4,009	3,217	4,305
Expected return on plan assets	(9,927)	(8,769)	(7,236)
Net amortization and deferral	(824)	(293)	197
Net periodic benefit cost	$ 88	$ 227	$ 5,211