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Commitments and contingencies - Income tax declaration for 2013 (Details)
 12 Months Ended
Oct. 05, 2021
USD ($)
Oct. 05, 2021
PEN (S/)
Dec. 31, 2022
USD ($)
Dec. 31, 2022
PEN (S/)
Dec. 31, 2019
USD ($)
Dec. 31, 2019
PEN (S/)
Dec. 31, 2022
PEN (S/)
Dec. 28, 2022
USD ($)
Dec. 28, 2022
PEN (S/)
Nov. 30, 2022
USD ($)
Nov. 30, 2022
PEN (S/)
Dec. 31, 2021
USD ($)
Dec. 31, 2021
PEN (S/)
Mar. 15, 2021
USD ($)
Mar. 15, 2021
PEN (S/)
Nov. 17, 2020
USD ($)
Nov. 17, 2020
PEN (S/)
Dec. 31, 2018
USD ($)
Dec. 31, 2018
PEN (S/)
Disclosure of Commitments and contingencies [Line Items]                                      
Amount of tax debt     $ 797,310,000                                
Contingent liability     10,827,000       S/ 41,358,000         $ 10,364,000 S/ 39,590,000            
Non-recognition of investment in development costs [Member]                                      
Disclosure of Commitments and contingencies [Line Items]                                      
Disallowance of bonus paid to contractors $ 1,185,000 S/ 4,526,000                                  
SUNAT.                                      
Disclosure of Commitments and contingencies [Line Items]                                      
Declared tax deductions not recognized                   $ 4,350,000 S/ 16,618,000                
Contingent liability     2,749,000       10,500,000                        
Deductible temporary differences for which no deferred tax asset is recognised                   $ 4,350,000 S/ 16,618,000                
SUNAT. | Open tax procedure                                      
Disclosure of Commitments and contingencies [Line Items]                                      
Declared tax deductions not recognized               $ 163,000 S/ 624,000         $ 36,449,000 S/ 139,235,000        
Payments of tax debt                               $ 1,246,000 S/ 4,744,000    
Deductible temporary differences for which no deferred tax asset is recognised               $ 163,000 S/ 624,000         $ 36,449,000 S/ 139,235,000        
SUNAT. | Year 2013 [Member] | Open tax procedure                                      
Disclosure of Commitments and contingencies [Line Items]                                      
Contingent liability     15,160,000       57,909,000         $ 14,520,000 S/ 55,465,000            
SUNAT. | Year 2014 [Member] | Open tax procedure                                      
Disclosure of Commitments and contingencies [Line Items]                                      
Declared tax deductions not recognized                                   $ 24,842,000 S/ 94,898,000
Disallowance of bonus paid to contractors         $ 541,000 S/ 2,067,000                          
Deductible temporary differences for which no deferred tax asset is recognised                                   $ 24,842,000 S/ 94,898,000
SUNAT. | Ifrs Tax Year 2017 [Member]                                      
Disclosure of Commitments and contingencies [Line Items]                                      
Amount of tax debt     4,579,000 S/ 17,493,000                              
Amount of tax liability paid     2,426,000 S/ 9,266,000                              
Amount related to unaccepted repairs     2,400,000       9,224,000                        
SUNAT. | Ifrs Tax Year 2017 [Member] | Non-recognition of investment in development costs [Member]                                      
Disclosure of Commitments and contingencies [Line Items]                                      
Declared tax deductions not recognized     10,398,000       39,720,000                        
Deductible temporary differences for which no deferred tax asset is recognised     10,398,000       39,720,000                        
SUNAT. | Ifrs Tax Year 2017 [Member] | Non-recognition of the compensation of carry-over tax losses from previous years [Member]                                      
Disclosure of Commitments and contingencies [Line Items]                                      
Services of related parties not recognised     33,489,000       127,929,000                        
SUNAT. | Ifrs Tax Year 2017 [Member] | Declaration of transfer prices and the operations between related parties [Member]                                      
Disclosure of Commitments and contingencies [Line Items]                                      
Services of related parties not recognised     $ 875,000       S/ 3,341,000