Related party transactions - Impact on the results of operations of transactions between the Corporation and EVERTEC (Details) - EVERTEC Inc. - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Related Party Transaction
Related Party Transaction, Amounts of Transaction	$ (53,488)	$ (49,279)	$ (157,822)	$ (142,342)
Interest Expense
Related Party Transaction
Interest Expense Related Party	(103)	(71)	(267)	(228)
ATH and credit cards interchange income from services
Related Party Transaction
Related Party Transaction Revenues From Transactions With Related Party	6,849	6,153	20,278	16,172
Rental income charged
Related Party Transaction
Related Party Transaction Revenues From Transactions With Related Party	1,973	1,758	4,915	5,293
Processing fees on services provided
Related Party Transaction
Expenses from Transactions with related party	(62,421)	(57,372)	(183,302)	(164,373)
Other services provided
Related Party Transaction
Related Party Transaction Revenues From Transactions With Related Party	$ 214	$ 253	$ 554	$ 794

Amount of interest expense incurred on a debt or other obligation to related party.

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Amount of transactions with related party during the financial reporting period.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 220
-Section S99
-Paragraph 1
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