SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
SUPPLEMENTAL CASH FLOW INFORMATION [Abstract]
Interest (exclusive of amount capitalized)	$ 19,798	$ 15,829
Income taxes	(364)	(105,699)
Accrued liabilities for purchases of property, plant & equipment	34,360	24,714
Accrued liabilities for common stock purchases	0	2,255
Right-of-use assets obtained in exchange for new operating lease liabilities	435,192	0
Amounts referable to business acquisitions Liabilities assumed		$ 2,796
Amounts referable to business acquisitions Liabilities assumed	$ (2,720)