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Management of Financial Risk (Disclosure of Nature and Extent Arising from Financial Instruments - Currency Risk) (Details) S/ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands | 12 Months Ended |  |
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Dec. 31, 2018 PEN (S/) | Dec. 31, 2018 MXN ($) | Dec. 31, 2018 ARS ($) | Dec. 31, 2018 CAD ($) | Dec. 31, 2018 MXN ($) | Dec. 31, 2018 CAD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 PEN (S/) | Dec. 31, 2017 MXN ($) | Dec. 31, 2017 ARS ($) | Dec. 31, 2017 CAD ($) | Dec. 31, 2017 USD ($)
CANADA |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign exposure on asset (liabilities), net |  |  |  |  |  | $ (2,602) | $ (2,010) |  |  |  | $ (7,341) | $ (5,852)
Effect of Foreign denominated items |  |  |  | $ 351 |  |  |  |  |  |  |  |
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 |  |  |  |  |  | 376 |  |  |  |  | 4,511 |
CANADA | Marketable Securities [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on assets |  |  |  |  |  |  |  |  |  |  | 697 |
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 |  |  |  |  |  | 279 |  |  |  |  | 292 |
CANADA | Investments In Associate [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on assets |  |  |  |  |  | 5,244 |  |  |  |  | 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 |  |  |  |  |  | (8,478) |  |  |  |  | (14,950) |
CANADA | Due to Related Party [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities |  |  |  |  |  | $ (23) |  |  |  |  |  |
CANADA | Other Liabilities [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities |  |  |  |  |  |  |  |  |  |  | $ (1,576) |
PERU |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign exposure on asset (liabilities), net | S/ (18,023) |  |  |  |  |  | (5,458) | S/ (18,333) |  |  |  | (5,650)
Effect of Foreign denominated items | S/ | S/ 506 |  |  |  |  |  |  |  |  |  |  |
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/ 941 |  |  |  |  |  |  | 693 |  |  |  |
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/ | 3,660 |  |  |  |  |  |  | 4,428 |  |  |  |
PERU | Income Tax Receivable [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on assets | S/ | 459 |  |  |  |  |  |  | 421 |  |  |  |
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/ | (18,492) |  |  |  |  |  |  | (17,244) |  |  |  |
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/ (4,591) |  |  |  |  |  |  | S/ (6,631) |  |  |  |
MEXICO |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign exposure on asset (liabilities), net |  |  |  |  | $ (302,032) |  | (16,055) |  | $ (482,771) |  |  | (24,462)
Effect of Foreign denominated items |  | $ 1,874 |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  | 37,039 |  |  |  | 27,842 |  |  |
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 |  |  |  |  | 11,836 |  |  |  | 3,018 |  |  |
MEXICO | Trade and Other Payables [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities |  |  |  |  | (218,833) |  |  |  | (253,702) |  |  |
MEXICO | Provisions Current [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities |  |  |  |  | (2,991) |  |  |  | (2,418) |  |  |
MEXICO | Income Tax Payable [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities |  |  |  |  | (59,810) |  |  |  | (176,977) |  |  |
MEXICO | Other Liabilities [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities |  |  |  |  | (2,296) |  |  |  | (1,967) |  |  |
MEXICO | Provisions Noncurrent [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities |  |  |  |  | $ (66,977) |  |  |  | $ (78,567) |  |  |
ARGENTINA |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign exposure on asset (liabilities), net | S/ 479,810 |  |  |  |  |  | $ 11,646 |  |  | $ 4,405 |  | $ 236
Effect of Foreign denominated items |  |  | $ 878 |  |  |  |  |  |  |  |  |
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 | S/ 6,967 |  |  |  |  |  |  |  |  | 12,186 |  |
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 | 598,002 |  |  |  |  |  |  |  |  | 33 |  |
ARGENTINA | Trade and Other Payables [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange exposure on liabilities | S/ (125,159) |  |  |  |  |  |  |  |  | $ (7,814) |  |

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