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FINANCIAL RISK MANAGEMENT FINANCIAL RISK MANAGEMENT (Market risk narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Borrowings | $ 3,221,907 | $ 1,218,635
Currency risk |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Reasonably possible change in risk variable, percent | 1.00% |
Reasonably possible change in risk variable, impact on pre-tax earnings | $ 4,900 | 4,900
Net investments exposed to volatility in exchange rate, amount | 1,200,000 |
Reasonably possible change in risk variable, impact on equity | $ 11,900 | 10,400
Interest rate risk |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Reasonably possible change in risk variable, percent | 10000.00% |
Reasonably possible change in risk variable, impact on pre-tax earnings | $ 20,500 | 13,500
Argentina, Pesos | Currency risk |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Devaluation, percent | 14.80% |
Change in risk variable, impact on comprehensive income | $ 97,000 |
Change in risk variable, impact on profit and loss | $ 47,000 |
Reasonably possible change in risk variable, percent | 1.00% |
Reasonably possible change in risk variable, impact on pre-tax earnings | $ 1,100 | 700
Mexico, Pesos | Currency risk |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Reasonably possible change in risk variable, percent | 1.00% |
Reasonably possible change in risk variable, impact on pre-tax earnings | $ 4,300 | 5,500
Colombia, Pesos | Currency risk |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Reasonably possible change in risk variable, percent | 1.00% |
Reasonably possible change in risk variable, impact on pre-tax earnings | $ 200 | $ 100
Brazil, Brazil Real | Currency risk |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Reasonably possible change in risk variable, percent | 1.00% |
Reasonably possible change in risk variable, impact on pre-tax earnings | $ 1,900 |
Weighted average |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Borrowings, interest rate | 4.76% | 6.92%
Floating Rate |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Borrowings | $ 2,075,276 | $ 813,709
Floating Rate | Interest rate risk |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Borrowings | $ 2,075,000 | $ 814,000
Borrowings, percentage of total borrowings | 64.40% | 66.80%

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