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	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	$ (43,903)	$ (38,025)	$ (87,490)	$ (73,533)
Deposits
Related Party Transaction [Line Items]
Interest Expense Related Party	(15)	(14)	(32)	(25)
Other Fee Revenue
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	8,457	8,472	16,676	16,454
Rental Income
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	1,796	1,751	3,593	3,516
Processing Fees
Related Party Transaction [Line Items]
Expenses from Transactions with related party	(54,491)	(48,525)	(108,353)	(94,083)
Other Expense
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	$ 350	$ 291	$ 626	$ 605

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.

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-Publisher FASB
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-Topic 850
-SubTopic 10
-Section 50
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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.

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