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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
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)