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INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | $ 1,617,247 | $ 1,610,313 | $ 1,321,425 | $ 1,880,079
Gross Book Value [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | 1,981,284 | 1,880,354 |  |
Airport Slots [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill | [1] | 964,513 | 978,849 | 816,987 | 1,201,028
Airport Slots [Member] | Gross Book Value [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | 964,513 | 978,849 |  |
Loyalty Program [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | 321,440 | 326,262 |  |
Loyalty Program [Member] | Gross Book Value [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | 321,440 | 326,262 |  |
Computer Software [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | 160,970 | 157,016 | 104,258 | 126,797
Computer Software [Member] | Gross Book Value [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | 509,377 | 419,652 |  |
Developing Software [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | 123,415 | 91,053 | $ 74,887 | $ 74,050
Developing Software [Member] | Gross Book Value [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | 123,415 | 91,053 |  |
Trade Marks [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | 46,909 | 57,133 |  |
Trade Marks [Member] | Gross Book Value [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | 62,539 | 63,730 |  |
Other Assets [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  |  |  |  |
Other Assets [Member] | Gross Book Value [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  |  | $ 808 |  |
[1] | See Note 2.5

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