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SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
SUPPLEMENTAL CASH FLOW INFORMATION [Abstract]    
Interest (exclusive of amount capitalized) $ 67,849 $ 67,679
Income taxes 117,204 64,556
Accrued liabilities for purchases of property, plant & equipment 17,924 20,850
Amounts referable to business acquisitions Liabilities assumed $ 1,935 $ 0