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Income Tax - Additional Information (Detail)
 6 Months Ended 12 Months Ended
Dec. 01, 2013
Jun. 30, 2013
Oct. 19, 2012
USD ($)
Oct. 11, 2011
Jun. 30, 2013
USD ($)
Dec. 31, 2015
USD ($)
Employee
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Income Tax Examination [Line Items]                
Adjustment to deferred taxes due to changes in enacted tax rate         $ 1,400,000   $ (731,000) $ 3,568,000
Unremitted earnings for foreign subsidiaries           $ 27,000,000    
Preferential tax rate 4.00%     7.00%   4.00%    
Tax exemption, conditions           The grant contains customary commitments, conditions and representations that EVERTEC Group will be required to comply with in order to maintain the grant. The more significant commitments include: (i) maintaining at least 750 employees in EVERTEC Group’s Puerto Rico data processing operations during 2012 and at least 700 employees for the remaining years of the grant, (ii) investing at least $200.0 million in building, machinery, equipment or computer programs to be used in Puerto Rico during the effective term of the grant (to be made over four year capital investment cycles in $50.0 million increments); and (iii) 80% of EVERTEC Group employees must be residents of Puerto Rico.    
Commitments to maintain tax exemption grant, investments     $ 200,000,000          
Commitments to maintain tax exemption grant, investment increment over four year cycle     $ 50,000,000          
Tax exemption expiration date           Nov. 01, 2024    
Percentage of net operating loss deduction with regular tax           80.00%    
Percentage of net operating loss deduction with alternative minimum tax           70.00%    
NOL carryforwards available to offset future taxable income           $ 10,900,000    
Deferred tax assets realized, increase in equity, description           Equity will be increased by $4.2 million if and when such windfall tax benefit is ultimately realized.    
Unrecognized tax benefits (expense)           $ 2,000 (1,200) (900)
Income tax benefit (expense)           12,400,000 12,400,000 $ 12,400,000
Liability for interest and penalties           $ 1,300,000 $ 3,300,000  
During 2012 [Member]                
Income Tax Examination [Line Items]                
Commitments to maintain tax exemption grant, minimum number of employees to be maintained | Employee           750    
For the remaining years of the grant [Member]                
Income Tax Examination [Line Items]                
Commitments to maintain tax exemption grant, minimum number of employees to be maintained | Employee           700    
Development Services [Member]                
Income Tax Examination [Line Items]                
Base tax rate           7.00%    
Base tax rate period           10 years    
Income Tax [Member]                
Income Tax Examination [Line Items]                
Tax exemption period     15 years          
Tax exemption period, effective date           Jan. 01, 2012    
Municipal Taxes [Member]                
Income Tax Examination [Line Items]                
Tax exemption period     15 years          
Tax exemption period, effective date           Jan. 01, 2013    
Puerto Rico [Member]                
Income Tax Examination [Line Items]                
Commitments to maintain tax exemption grant, percentage of resident employees     80.00%          
Minimum [Member] | Puerto Rico [Member]                
Income Tax Examination [Line Items]                
Corporate income tax   30.00%            
Maximum [Member] | Puerto Rico [Member]                
Income Tax Examination [Line Items]                
Corporate income tax   39.00%