SUPPLEMENTAL CASH FLOW INFORMATION (Supplemental Information Referable to Condensed Consolidated Statements of Cash Flows) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
SUPPLEMENTAL CASH FLOW INFORMATION [Abstract]
Interest (exclusive of amount capitalized)		$ 17,033	$ 19,798
Income taxes		340	(364)
Accrued liabilities for purchases of property, plant & equipment		25,862	34,360
Right-of-use assets obtained in exchange for new operating lease liabilities	[1]	21,522	435,192
Amounts referable to business acquisitions Liabilities assumed		$ 0	$ (2,720)

[1] The 2019 amount includes the initial right-of-use assets resulting from our adoption of ASU 2016-02, “Leases.”