SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Supplemental disclosures of cash flow information:
Cash paid for interest (net of capitalized interest)	$ 53,375	$ 52,329
Cash paid for income taxes	658	159
Capitalized interest	1,973	1,788
Cash paid for lease liabilities	5,467
Non-cash activities:
Initial recognition of non-cash ROU assets and operating lease obligations (Note 8)	151,408
Capital expenditure accruals	$ 64,252	$ 64,662