EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Company-administered plans:
Contribution to pension plans			$ 16,000
Expected plan contributions	$ 34,000		34,000
Pension Benefits
Company-administered plans:
Net pension expense	11,909	$ 6,710	23,980	$ 13,692
Company Administered Plan | Pension Benefits
Company-administered plans:
Service cost	2,783	3,095	5,815	6,296
Interest cost	21,395	19,098	42,864	38,850
Expected return on plan assets	(22,589)	(25,065)	(45,265)	(50,899)
Net actuarial loss	7,432	6,914	15,042	14,286
Prior service cost	187	144	366	289
Net pension expense	9,208	4,186	18,822	8,822
Union Administered Plan | Pension Benefits
Company-administered plans:
Net pension expense	2,701	2,524	5,158	4,870
U.S. | Company Administered Plan | Pension Benefits
Company-administered plans:
Net pension expense	10,659	6,665	22,132	14,022
Non-U.S. | Company Administered Plan | Pension Benefits
Company-administered plans:
Net pension expense	$ (1,451)	$ (2,479)	$ (3,310)	$ (5,200)