XML 140 R103.htm IDEA: XBRL DOCUMENT
v3.19.1

Income taxes - Summary of Unrecognized Tax Losses (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Tax effect of tax losses | $ 160,052 | $ 167,030
Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Tax effect of tax losses | 137,268 |
Brazil [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Tax effect of tax losses | 5,538 |
Greece [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Tax effect of tax losses | 17,246 |
2019 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 14,964 |
2019 [member] | Greece [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 14,964 |
2020 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 25,221 |
2020 [member] | Greece [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 25,221 |
2021 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 10,451 |
2021 [member] | Greece [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 10,451 |
2022 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 8,007 |
2022 [member] | Greece [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 8,007 |
2023 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 10,337 |
2023 [member] | Greece [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 10,337 |
2025 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 7,894 |
2025 [member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 7,894 |
2026 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 14,966 |
2026 [member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 14,966 |
2027 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 10,638 |
2027 [member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 10,638 |
2028 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 25,971 |
2028 [member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 25,971 |
2029 [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 23,444 |
2029 [Member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 23,444 |
2030 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 7,282 |
2030 [member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 7,282 |
2031 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 45,351 |
2031 [member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 45,351 |
2032 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 74,855 |
2032 [member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 74,855 |
2033 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 64,883 |
2033 [member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 64,883 |
2034 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 58,689 |
2034 [member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 58,689 |
2035 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 55,266 |
2035 [member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 55,266 |
2036 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 50,503 |
2036 [member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 50,503 |
2037 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 27,333 |
2037 [member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 27,333 |
2038 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 9,025 |
2038 [member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 9,025 |
No Expiry [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 32,407 |
No Expiry [member] | Brazil [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 32,407 |
Tax losses carried forward [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 577,487 |
Tax losses carried forward [member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 476,100 |
Tax losses carried forward [member] | Brazil [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 32,407 |
Tax losses carried forward [member] | Greece [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 68,980 |
Capital losses with no expiry [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | 64,837 |
Capital losses with no expiry [member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Gross amount of the tax losses | $ 64,837 |

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