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COSTS AND EXPENSES BY NATURE (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Material income and expense [abstract] |  |  |
Aircraft fuel | $ 2,318,816 | $ 2,056,643 | $ 2,651,067
Other rentals and landing fees | 1,172,129 | 1,077,407 | 1,109,826
Aircraft rentals | 579,551 | 568,979 | 525,134
Aircraft maintenance | 430,825 | 366,153 | 437,235
Comissions | 252,474 | 269,296 | 302,774
Passenger services | 288,662 | 286,621 | 295,439
Other operating expenses | 1,381,546 | 1,424,595 | 1,293,320
Total | $ 6,424,003 | $ 6,049,694 | $ 6,614,795

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- Definition It represents the aircraft rentals expense. + References No definition available. + Details
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