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Long-term debt (Debt Repurchases) (Details) - 2016 Notes R$ in Thousands, $ in Thousands |  |  |  |  |  |  | 8 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Jul. 13, 2016 BRL (R$) | Jul. 13, 2016 USD ($) | May 05, 2016 BRL (R$) | May 05, 2016 USD ($) | Apr. 21, 2016 BRL (R$) | Apr. 21, 2016 USD ($) | Jan. 29, 2016 BRL (R$) | Jan. 29, 2016 USD ($) | Nov. 30, 2015 BRL (R$) | Nov. 30, 2015 USD ($) | Nov. 25, 2015 BRL (R$) | Nov. 25, 2015 USD ($) | Jul. 13, 2016 BRL (R$) | Jul. 13, 2016 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption price (as a percent) | 100.00% | 100.00% | 97.00% | 97.00% | 100.00% | 100.00% | 97.75% | 97.75% | 93.75% | 93.75% | 93.75% | 93.75% |  |
Redemption amount | R$ 200,991 | $ 60,965 | R$ 4,025 | $ 1,106 | R$ 421,765 | $ 118,797 | R$ 1,180 | $ 288 | R$ 7,039 | $ 1,715 | R$ 40,000 | $ 9,995 | R$ 675,000 | $ 192,866

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- Definition Percentage price of original principal amount of debt at which debt can be redeemed by the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
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