Related party transactions - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Related Party Transactions (Details) [Line Items]
Assigned receivables	$ 950,247		$ 950,247		$ 764,183
Loss from sale of receivables	101,449	$ 86,291	101,449	$ 86,291
Financial investments	612,498		612,498		454,781
Interest income	65,946	$ 135,030	219,278	363,080
Commitments agreements amount	$ 197,041		197,041		$ 115,804
Certificado de Depósito Interbancário
Related Party Transactions (Details) [Line Items]
Interest income			$ 25,596	$ 36,432

The amount of income arising from interest.

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