The Company and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	0 Months Ended		9 Months Ended	12 Months Ended				12 Months Ended									0 Months Ended	12 Months Ended			0 Months Ended										12 Months Ended				0 Months Ended	12 Months Ended		0 Months Ended	12 Months Ended
	Dec. 18, 2013	Dec. 13, 2013	Sep. 30, 2013	Dec. 31, 2013 Country	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2010	Dec. 31, 2013 Software packages	Dec. 31, 2012 Software packages	Dec. 31, 2011 Software packages	Dec. 31, 2013 Expense Reimbursements	Dec. 31, 2012 Expense Reimbursements	Dec. 31, 2011 Expense Reimbursements	Dec. 31, 2013 Senior Notes	Apr. 17, 2013 Senior Notes	Dec. 31, 2012 Senior Notes	Dec. 13, 2013 Common Stock	Dec. 31, 2013 Common Stock	Dec. 31, 2012 Common Stock	Dec. 31, 2011 Common Stock	Apr. 17, 2013 Evertec Inc Common Stock	Dec. 13, 2013 Selling Stockholders	Sep. 18, 2013 Selling Stockholders	Apr. 17, 2013 Selling Stockholders Common Stock	Dec. 13, 2013 Apollo Global Management Llc	Sep. 18, 2013 Apollo Global Management Llc	Apr. 17, 2013 Apollo Global Management Llc Common Stock	Dec. 13, 2013 Popular	Sep. 18, 2013 Popular	Apr. 17, 2013 Popular Common Stock	Dec. 31, 2013 Minimum Software packages	Dec. 31, 2012 Minimum Software packages	Dec. 31, 2013 Maximum Software packages	Dec. 31, 2012 Maximum Software packages	Apr. 17, 2013 IPO Common Stock	Dec. 31, 2013 Software Development Minimum	Dec. 31, 2013 Software Development Maximum	Apr. 17, 2013 2013 Credit Agreement IPO	Dec. 31, 2013 2013 Credit Agreement IPO	Dec. 31, 2013 Software and maintenance contracts Minimum	Dec. 31, 2013 Software and maintenance contracts Maximum
Company And Summary Of Significant Accounting Policies [Line Items]
Number of countries where the Company provides a broad range of merchant acquiring, payment processing and business process management services				19
Shares issued under Initial and Other Public Offerings																			91,696	688,200	6,250,000	15,233,273	23,000,000	22,539,943	0	9,200,000	13,739,284	11,700,000	17,500,000	8,800,659					28,789,943
Offering price per share				$ 0.01																		$ 20.60	$ 22.50												$ 20.00
Net proceeds from Initial Public Offering				$ 29,000	$ 450,000	$ 2,641,000																																$ 117,400,000	$ 117,400,000
Senior notes, interest rate														11.00%	11.00%	11.00%
Senior notes, maturity date															2018
Percentage of equity interest owned																										11.20%		14.90%	21.30%
Common stock repurchased	3,690,036																3,690,036	3,690,036
Repurchase of common stock		25,000,000		75,000,000													25,000,000
Share repurchased under revolving credit facility		50,000,000
Intangible asset useful life																															3 years	3 years	10 years	10 years		3 years	10 years			1 year	5 years
Interest cost capitalized				200,000	400,000	400,000
Impairment losses			0	0	0	0
Merger, percentage of interests acquired							51.00%
Software cost reimbursement				3,586,000	6,099,000
Fair value recorded				0	0
Expected reimbursement						400,000
Gain (Loss) realized on fair value adjustment								$ 400,000	$ 33,000	$ 500,000	$ 0	$ 1,000,000	$ (800,000)