Related party transactions - Proportionate share of income (loss) and changes in stockholder's equity from 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 [Line Items]
Share of income from investment	$ 5,709	$ 5,586	$ 19,426	$ 11,696
Share of other changes in stockholders equity	610	1,135	1,009	1,804
Share of changes in equity recognized in income	$ 6,319	$ 6,721	$ 20,435	$ 13,500