Condensed Financial Statements Parent Company Only - Condensed Statements of Income and Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Non-operating income (expenses)
Equity in earnings of subsidiaries	$ 604	$ (52)	$ 147
Interest income	716	377	495
Other income, net	2,657	544	2,306
Income before income taxes	60,199	83,397	82,042
Income tax benefit	4,780	8,271	(3,335)
Net income	55,054	75,036	85,377
Other comprehensive income (loss), net of tax
Gain (loss) on cash flow hedge	2,178	(1,449)	(515)
Total comprehensive income attributable to EVERTEC, Inc.’s common stockholders	56,597	70,227	84,317
EVERTEC
Non-operating income (expenses)
Equity in earnings of subsidiaries	49,162	75,373	81,161
Interest income	301	244	232
Other income, net	(1,428)	(1,351)	(1,686)
Income before income taxes	48,035	74,266	79,707
Income tax benefit	(7,019)	(770)	(5,670)
Net income	55,054	75,036	85,377
Other comprehensive income (loss), net of tax
Foreign currency translation adjustments	(635)	(3,360)	(545)
Gain (loss) on cash flow hedge	2,178	(1,449)	(515)
Total comprehensive income attributable to EVERTEC, Inc.’s common stockholders	$ 56,597	$ 70,227	$ 84,317