Condensed Financial Statements Parent Company Only - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	$ 145,786	$ 168,054	$ 162,419
Cash flows from financing activities
Dividends paid	(21,762)	(29,696)	(30,921)
Repurchase of common stock	(7,671)	(39,946)	(54,949)
Withholding taxes paid on share-based compensation	(1,588)	(548)	(306)
Net cash used in financing activities	(69,183)	(90,798)	(112,718)
Net (decrease) increase in cash and cash equivalents	(1,497)	23,173	(3,367)
Cash and cash equivalents at beginning of the period	51,920	28,747	32,114
Cash and cash equivalents at end of the period	50,423	51,920	28,747
EVERTEC
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	29,422	71,795	86,237
Cash flows from financing activities
Dividends paid	(21,762)	(29,696)	(30,921)
Repurchase of common stock	(7,671)	(39,946)	(54,949)
Withholding taxes paid on share-based compensation	(1,588)	(548)	(306)
Net cash used in financing activities	(31,021)	(70,190)	(86,176)
Net (decrease) increase in cash and cash equivalents	(1,599)	1,605	61
Cash and cash equivalents at beginning of the period	3,278	1,673	1,612
Cash and cash equivalents at end of the period	$ 1,679	$ 3,278	$ 1,673