Related party transactions - Impact on the results of operations of transactions between the Corporation and EVERTEC (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction
Related Party Transaction, Amounts of Transaction	$ (8,360)	$ (1,491)
EVERTEC Inc.
Related Party Transaction
Related Party Transaction, Amounts of Transaction	(192,671)	(182,338)	$ (132,139)
EVERTEC Inc. \| Interest Expense
Related Party Transaction
Interest Expense Related Party	(315)	(106)	(79)
EVERTEC Inc. \| Other service fees
Related Party Transaction
Related Party Transaction Revenues From Transactions With Related Party	22,406	29,224	33,658
EVERTEC Inc. \| Net occupancy
Related Party Transaction
Related Party Transaction Revenues From Transactions With Related Party	7,305	7,418	7,271
EVERTEC Inc. \| Professional fees
Related Party Transaction
Expenses from Transactions with related party	(223,069)	(219,992)	(174,048)
EVERTEC Inc. \| Other operating expenses
Related Party Transaction
Related Party Transaction Revenues From Transactions With Related Party	$ 1,002	$ 1,118	$ 1,059

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

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
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-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864

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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

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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

No definition available.

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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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07.1(c))
-URI http://asc.fasb.org/extlink&oid=116637345&loc=SL114874292-224272

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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

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