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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	$ (47,716)	$ (37,835)	$ (135,207)	$ (111,368)
Deposits
Related Party Transaction [Line Items]
Interest Expense Related Party	(27)	(21)	(59)	(46)
Other service fees
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	6,221	8,486	22,897	24,940
Net occupancy
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	1,744	1,781	5,337	5,297
Professional fees
Related Party Transaction [Line Items]
Expenses from Transactions with related party	(55,901)	(48,360)	(164,255)	(142,443)
Other operating expenses
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	$ 247	$ 279	$ 873	$ 884

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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-SubTopic 10
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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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