Net Income Per Common Share - Reconciliation of Income Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net income available to EVERTEC, Inc.’s common shareholders	$ 10,036	$ 137,814	$ 68,243	$ 210,301
Weighted average common shares outstanding (in shares)	64,648,542	66,398,547	64,886,551	69,906,483
Weighted average potential dilutive common shares (in shares)	1,130,717	647,262	819,045	682,432
Weighted average common shares outstanding - assuming dilution (in shares)	65,779,259	67,045,809	65,705,596	70,588,915
Net income per common share - basic (in usd per share)	$ 0.16	$ 2.08	$ 1.05	$ 3.01
Net income per common share - diluted (in usd per share)	$ 0.15	$ 2.06	$ 1.04	$ 2.98