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Management of Financial Risk (Disclosure of Nature and Extent Arising from Financial Instruments - Currency Risk) (Details) - Currency risk [member] S/ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands | 12 Months Ended |  |
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Dec. 31, 2017 PEN (S/) | Dec. 31, 2017 MXN ($) | Dec. 31, 2017 ARS ($) | Dec. 31, 2017 CAD ($) | Dec. 31, 2017 MXN ($) | Dec. 31, 2017 ARS ($) | Dec. 31, 2017 CAD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 PEN (S/) | Dec. 31, 2016 MXN ($) | Dec. 31, 2016 ARS ($) | Dec. 31, 2016 CAD ($) | Dec. 31, 2016 USD ($)
CANADA |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exposure on asset (liabilities), net |  |  |  |  |  |  | $ (7,341) | $ (5,852) |  |  |  | $ (7,195) | $ (5,359)
Effect of Foreign denominated items |  |  |  | $ 509 |  |  |  |  |  |  |  |  |
Change percentage, currency | 10.00% | 10.00% | 10.00% | 10.00% |  |  |  |  |  |  |  |  |
CANADA | Cash and Cash Equivalent [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on assets |  |  |  |  |  |  | 4,511 |  |  |  |  | 9,436 |
CANADA | Marketable Securities [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on assets |  |  |  |  |  |  | 697 |  |  |  |  | 2,300 |
CANADA | Accounts Receivable and Other Assets [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on assets |  |  |  |  |  |  | 292 |  |  |  |  | 343 |
CANADA | Investments In Associate [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on assets |  |  |  |  |  |  | 3,685 |  |  |  |  |  |
CANADA | Trade and Other Payables [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities |  |  |  |  |  |  | (14,950) |  |  |  |  | (14,581) |
CANADA | Due to Related Party [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities |  |  |  |  |  |  |  |  |  |  |  | (14) |
CANADA | Other Liabilities [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities |  |  |  |  |  |  | $ (1,576) |  |  |  |  | $ (4,679) |
PERU |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exposure on asset (liabilities), net | S/ (18,333) |  |  |  |  |  |  | (5,650) | S/ (40,563) |  |  |  | (12,072)
Effect of Foreign denominated items | S/ | S/ 739 |  |  |  |  |  |  |  |  |  |  |  |
Change percentage, currency | 10.00% | 10.00% | 10.00% | 10.00% |  |  |  |  |  |  |  |  |
PERU | Cash and Cash Equivalent [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on assets | S/ | S/ 693 |  |  |  |  |  |  |  | 4,098 |  |  |  |
PERU | Accounts Receivable and Other Assets [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on assets | S/ | 4,428 |  |  |  |  |  |  |  | 3,810 |  |  |  |
PERU | Income Tax Receivable [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on assets | S/ | 421 |  |  |  |  |  |  |  | 243 |  |  |  |
PERU | Trade and Other Payables [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities | S/ | (17,244) |  |  |  |  |  |  |  | (13,666) |  |  |  |
PERU | Provisions Current [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities | S/ |  |  |  |  |  |  |  |  | (2,765) |  |  |  |
PERU | Income Tax Payable [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities | S/ | S/ (6,631) |  |  |  |  |  |  |  | (7,564) |  |  |  |
PERU | Provisions Noncurrent [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities | S/ |  |  |  |  |  |  |  |  | S/ (24,719) |  |  |  |
MEXICO |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exposure on asset (liabilities), net |  |  |  |  | $ (482,771) |  |  | (24,462) |  | $ (496,595) |  |  | (24,032)
Effect of Foreign denominated items |  | $ 2,351 |  |  |  |  |  |  |  |  |  |  |
Change percentage, currency | 10.00% | 10.00% | 10.00% | 10.00% |  |  |  |  |  |  |  |  |
MEXICO | Cash and Cash Equivalent [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on assets |  |  |  |  | 27,842 |  |  |  |  | 7,788 |  |  |
MEXICO | Accounts Receivable and Other Assets [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on assets |  |  |  |  | 3,018 |  |  |  |  | 3,369 |  |  |
MEXICO | Deposits on Noncurrent Assets [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on assets |  |  |  |  |  |  |  |  |  | 4,325 |  |  |
MEXICO | Trade and Other Payables [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities |  |  |  |  | (253,702) |  |  |  |  | (208,364) |  |  |
MEXICO | Provisions Current [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities |  |  |  |  | (2,418) |  |  |  |  | (6,169) |  |  |
MEXICO | Income Tax Payable [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities |  |  |  |  | (176,977) |  |  |  |  | (202,804) |  |  |
MEXICO | Other Liabilities [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities |  |  |  |  | (1,967) |  |  |  |  | (1,220) |  |  |
MEXICO | Provisions Noncurrent [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities |  |  |  |  | $ (78,567) |  |  |  |  | $ (93,520) |  |  |
ARGENTINA |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exposure on asset (liabilities), net |  |  |  |  |  | $ 4,405 |  | $ 236 |  |  | $ 14,371 |  | $ 904
Effect of Foreign denominated items |  |  | $ 52 |  |  |  |  |  |  |  |  |  |
Change percentage, currency | 10.00% | 10.00% | 10.00% | 10.00% |  |  |  |  |  |  |  |  |
ARGENTINA | Cash and Cash Equivalent [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on assets |  |  |  |  |  | 12,186 |  |  |  |  | 16,502 |  |
ARGENTINA | Accounts Receivable and Other Assets [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on assets |  |  |  |  |  | 33 |  |  |  |  | 115 |  |
ARGENTINA | Deposits on Noncurrent Assets [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on assets |  |  |  |  |  |  |  |  |  |  | 8,419 |  |
ARGENTINA | Trade and Other Payables [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities |  |  |  |  |  | $ (7,814) |  |  |  |  | (3,891) |  |
ARGENTINA | Income Tax Payable [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities |  |  |  |  |  |  |  |  |  |  | 509 |  |
ARGENTINA | Provisions Noncurrent [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities |  |  |  |  |  |  |  |  |  |  | $ (7,283) |  |

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