Derivative financial instruments (Tables) |
9 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2018 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Derivative financial instruments [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair value amount of derivative financial instruments | The breakdown of the fair value amount of the derivative financial instruments as of September 30, 2018 and December 31, 2017 is as follows:
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