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FINANCIAL RISK MANAGEMENT (Market risk narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Borrowings | $ 2,036,957 | $ 3,221,907
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 | $ 5,000 | 4,900
Net investments exposed to volatility in exchange rate, amount | 1,800,000 |
Reasonably possible change in risk variable, impact on equity | $ 17,700 | 11,900
Interest rate 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 | $ 26,800 | $ 20,500
Argentina, Pesos | Currency risk |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Devaluation, percent | 50.50% | 14.80%
Change in risk variable, impact on comprehensive income | $ (387,000) | $ (97,000)
Change in risk variable, impact on profit and loss | (188,000) | (47,000)
Effect of inflation adjustment | $ 173,000 |
Reasonably possible change in risk variable, percent | 1.00% |
Reasonably possible change in risk variable, impact on pre-tax earnings | $ (2,100) | (1,100)
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 | $ 5,800 | 4,300
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) | (200)
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 | $ 1,500 | $ 1,900
Weighted average |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Borrowings, interest rate | 3.65% | 4.76%
Floating Rate |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Borrowings | $ 1,747,074 | $ 2,075,276
Floating Rate | Interest rate risk |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Borrowings | $ 1,747,000 | $ 2,075,000
Borrowings, percentage of total borrowings | 85.80% | 64.40%
Floating Rate | Argentina, Pesos |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Borrowings | $ 0 | $ 2,377
Floating Rate | Colombia, Pesos |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |
Borrowings | $ 0 | $ 11,793

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