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v3.19.1

Stockholders' equity and dividend payment - Dividend payment (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 26, 2019 | Nov. 23, 2018 | Aug. 31, 2018 | May 30, 2018 | Feb. 28, 2018 | Dec. 06, 2017 | Aug. 31, 2017 | May 31, 2017 | Feb. 22, 2017 | Nov. 23, 2016 | Aug. 31, 2016 | May 25, 2016 | Feb. 24, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Dividend payment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment | $ 7,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total payment |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 11,500,000 | $ 23,300,000 | $ 66,400,000
Per share Common | $ 0.05 |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.08 | $ 0.20 | $ 0.71
Quarterly dividend [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend payment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment |  | $ 2,900,000 | $ 2,900,000 | $ 2,900,000 | $ 2,900,000 | $ 2,800,000 | $ 2,800,000 | $ 10,100,000 | $ 7,600,000 | $ 1,900,000 | $ 21,500,000 | $ 23,300,000 | $ 19,700,000 |  |  |
Per share Common |  | $ 0.02 | $ 0.02 | $ 0.02 | $ 0.02 | $ 0.02 | $ 0.02 | $ 0.08 | $ 0.08 | $ 0.02 | $ 0.23 | $ 0.25 | $ 0.21 |  |  |

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- Definition The amount of dividends recognised as distributions to owners. + References No definition available. + Details
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- Definition Disclosure of dividend payments. + References No definition available. + Details
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- Definition The annual amount of dividends recognised as distributions to owners. + References No definition available. + Details
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- Definition The amount of dividends paid per ordinary share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 34 -IssueDate 2017-01-01 -Paragraph 16A -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=34&date=2017-03-01&anchor=para_16A_f&doctype=Standard -URIDate 2017-03-09 + Details
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- Details
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