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Summary of significant accounting policies - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Summary Of Significant Accounting Policies [Line Items]      
Value added tax and other tax receivable $ 23,211 $ 21,172  
Supplier finance obligation $ 14,849 13,650 $ 24,149
Lease term for most restaurants 17 years    
Equity method investment, realized gain (loss) $ 54 1,492 1,131
Equity method investments $ 14,346 18,111  
Supplier Finance Program, Obligation, Statement of Financial Position [Extensible Enumeration] Accounts payable     
Argentina      
Summary Of Significant Accounting Policies [Line Items]      
Non-monetary asset $ 179,700    
Venezuela      
Summary Of Significant Accounting Policies [Line Items]      
Non-monetary asset 20,600    
Company-operated restaurants      
Summary Of Significant Accounting Policies [Line Items]      
Advertising costs 184,145 175,043 148,776
Franchised operations      
Summary Of Significant Accounting Policies [Line Items]      
Advertising costs $ 52,761 $ 51,054 $ 44,088
Internal used software      
Summary Of Significant Accounting Policies [Line Items]      
Finite-lived intangible asset, useful life 3 years    
Minimum      
Summary Of Significant Accounting Policies [Line Items]      
Supplier payment period 15 days    
Minimum | Third party financial institutions      
Summary Of Significant Accounting Policies [Line Items]      
Supplier payment period 45 days    
Minimum | Equipment      
Summary Of Significant Accounting Policies [Line Items]      
Property and equipment, useful life 3 years    
Maximum      
Summary Of Significant Accounting Policies [Line Items]      
Supplier payment period 180 days    
Maximum | Third party financial institutions      
Summary Of Significant Accounting Policies [Line Items]      
Supplier payment period 180 days    
Maximum | Building      
Summary Of Significant Accounting Policies [Line Items]      
Property and equipment, useful life 40 years    
Maximum | Equipment      
Summary Of Significant Accounting Policies [Line Items]      
Property and equipment, useful life 10 years