EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Company-administered plans:
Contribution to pension plans			$ 17,000
Expected plan contributions	$ 37,000		37,000
Pension Benefits
Company-administered plans:
Net pension expense	6,566	$ 11,909	13,729	$ 23,980
Pension Benefits | Company-administered plans:
Company-administered plans:
Service cost	2,741	2,783	5,954	5,815
Interest cost	17,353	21,395	34,885	42,864
Expected return on plan assets	(23,948)	(22,589)	(48,211)	(45,265)
Net actuarial loss	7,437	7,432	15,152	15,042
Prior service cost	185	187	372	366
Net pension expense	3,768	9,208	8,152	18,822
Pension Benefits | Company-administered plans: | U.S.
Company-administered plans:
Net pension expense	6,055	10,659	12,833	22,132
Pension Benefits | Company-administered plans: | Non-U.S.
Company-administered plans:
Net pension expense	(2,287)	(1,451)	(4,681)	(3,310)
Pension Benefits | Union-administered plans
Company-administered plans:
Net pension expense	$ 2,798	$ 2,701	$ 5,577	$ 5,158