Net Income Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net income attributable to EVERTEC, Inc.’s common stockholders	$ 161,130	$ 104,436	$ 103,469
Less: non-forfeitable dividends on restricted stock	0	0	3
Net income available to EVERTEC, Inc.'s common shareholders	$ 161,130	$ 104,436	$ 103,466
Weighted average common shares outstanding (in shares)	72,053,795	71,943,965	72,099,755
Weighted average potential dilutive common shares (in shares)	816,790	1,107,240	1,376,008
Weighted average common shares outstanding-assuming dilution (in shares)	72,870,585	73,051,205	73,475,763
Net income per common share - basic (in dollar per share)	$ 2.24	$ 1.45	$ 1.44
Net income per common share - diluted (in dollar per share)	$ 2.21	$ 1.43	$ 1.41