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Equity (Details Narrative) - PEN (S/)
S/ / shares in Units, S/ in Thousands
 1 Months Ended 12 Months Ended
Dec. 31, 2016
Mar. 31, 2017
Jan. 31, 2017
Oct. 31, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Jun. 13, 2017
Mar. 01, 2017
Dec. 13, 2016
Sep. 30, 2016
Aug. 02, 2016
Jul. 31, 2016
Feb. 29, 2016
Feb. 02, 2016
Sep. 25, 2015
Jul. 14, 2015
Jun. 04, 2015
Dec. 31, 2014
Disclosure of classes of share capital [line items]                                      
Share capital authorized 531,461,479       423,868,449 531,461,479 531,461,479                        
Total outstanding shares 111,484,000       70,097,971 111,484,000 111,484,000                        
Number of investment shares acquired 50,503,124   7,911,845 37,276,580 40,278,894 50,503,124                          
Value of investment shares acquired         S/ (34,216) S/ (108,218)                        
Additional paid-in capital S/ 545,165       S/ 432,779 S/ 545,165                          
Dividends paid per share         S/ 0.35000 S/ 0.28500 S/ 0.28000                        
Dividends payable 5,070       S/ 29,725 S/ 5,070                         S/ 189
Capital contributions S/ 531,461       423,868 S/ 531,461                          
Impairment on Brine Project [Member]                                      
Disclosure of classes of share capital [line items]                                      
Additional paid-in capital         (6,759)                            
Impairment on Brine Project [Member] | Cementos Pacasmayo S.A.A. [Member]                                      
Disclosure of classes of share capital [line items]                                      
Additional paid-in capital         S/ (6,759)                            
Lima Stock Exchange [Member]                                      
Disclosure of classes of share capital [line items]                                      
Total outstanding shares 419,977,479       353,770,478 419,977,479 419,977,479                        
Quimpac S.A. [Member]                                      
Disclosure of classes of share capital [line items]                                      
Capital contributions S/ 473       S/ 490 S/ 473 S/ 277                        
Quimpac S.A. [Member] | USD                                      
Disclosure of classes of share capital [line items]                                      
Threshold of brine project for capital commitment         14,000                            
MCA Phosphates Pte. Ltd [Member]                                      
Disclosure of classes of share capital [line items]                                      
Capital contributions 4,015         4,015 28,198                        
Salmueras Sudamericanas S.A. [Member]                                      
Disclosure of classes of share capital [line items]                                      
Capital contributions               S/ 3,467   S/ 783         S/ 4,100     S/ 2,400  
Difference on capital contributions and interests acquired         576 S/ 556 S/ 325                        
Salmueras Sudamericanas S.A. [Member] | Impairment on Brine Project [Member]                                      
Disclosure of classes of share capital [line items]                                      
Additional paid-in capital                                    
Salmueras Sudamericanas S.A. [Member] | USD                                      
Disclosure of classes of share capital [line items]                                      
Threshold of brine project for capital commitment         S/ 100,000                            
Fosfatos del Pacifico S.A. [Member]                                      
Disclosure of classes of share capital [line items]                                      
Additional paid-in capital                 S/ 118,569                    
Capital contributions                 S/ 107,593   S/ 1,200 S/ 13,384 S/ 1,000 S/ 23,216   S/ 15,813 S/ 78,178    
Difference on capital contributions and interests acquired S/ 7,745,000                                    
Treasury shares [Member]                                      
Disclosure of classes of share capital [line items]                                      
Number of investment shares acquired     7,911,845 37,276,580 36,040,497                            
Value of investment shares acquired     S/ 34,216 S/ 108,248 S/ 119,005,000                            
Treasury shares [Member] | Fosfatos del Pacifico S.A. [Member]                                      
Disclosure of classes of share capital [line items]                                      
Value of investment shares acquired   S/ 23,459                                  
Treasury shares [Member] | Fosfatos del Pacifico S.A. [Member]                                      
Disclosure of classes of share capital [line items]                                      
Number of investment shares acquired   9,148,373                                  
Ordinary shares [member]                                      
Disclosure of classes of share capital [line items]                                      
Shares issued for additional paid-in capital 111,484,000         111,484,000                          
Investment shares [member]                                      
Disclosure of classes of share capital [line items]                                      
Shares issued for additional paid-in capital 928,000         928,000