SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Supplemental Cash Flow Elements [Abstract]
Interest paid	$ 123,258	$ 104,829
Income taxes paid	4,997	10,782
Right-of-use assets obtained in exchange for lease obligations:
Finance leases	5,511	6,633
Operating leases	52,640	40,911
Capital expenditures acquired but not yet paid	$ 75,576	$ 185,264