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Commitments and contingencies - Income tax declaration for 2014 (Details)
Dec. 31, 2022
USD ($)
Dec. 31, 2022
PEN (S/)
Dec. 28, 2022
USD ($)
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 ($)
Mar. 15, 2021
PEN (S/)
Dec. 31, 2018
USD ($)
Dec. 31, 2018
PEN (S/)
Disclosure of Commitments and contingencies [Line Items]                        
Contingent liability $ 10,827,000 S/ 41,358,000         $ 10,364,000 S/ 39,590,000        
Judicial process related to contractor bonuses [Member]                        
Disclosure of Commitments and contingencies [Line Items]                        
Contingent liability 1,229,000 4,695,000                    
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 S/ 10,500,000                    
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    
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