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Financial instruments(Details 2) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Financial instruments [Line Items] |  |  |
Other current financial assets |  | $ 366,979 | $ 289,189
Other financial assets [Member] |  |  |
Financial instruments [Line Items] |  |  |
Other current financial assets | [1] | 360,941 | 284,160
Banco Santander [Member] |  |  |
Financial instruments [Line Items] |  |  |
Other current financial assets |  | 163,269 | 54,364
Banco de Credito e Inversiones [Member] |  |  |
Financial instruments [Line Items] |  |  |
Other current financial assets |  | 71,748 | 40,627
Banco Itau - Corpbanca [Member] |  |  |
Financial instruments [Line Items] |  |  |
Other current financial assets |  | 77,527 | 63,969
Banco Security [Member] |  |  |
Financial instruments [Line Items] |  |  |
Other current financial assets |  | 28,592 | 15,007
Morgan Stanley [Member] |  |  |
Financial instruments [Line Items] |  |  |
Other current financial assets |  | 0 | 3,150
Scotiabank Sud Americano [Member] |  |  |
Financial instruments [Line Items] |  |  |
Other current financial assets |  | 13,764 | 107,043
Banco Chile [Member] |  |  |
Financial instruments [Line Items] |  |  |
Other current financial assets |  | 4,834 | 0
Banco BBVA Chile [Member] |  |  |
Financial instruments [Line Items] |  |  |
Other current financial assets |  | $ 1,207 | $ 0
[1] | Relates to term deposits with maturities exceeding 90 days and less than 360 days from the investment date.

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