Goodwill - Changes in Carrying Amount of Goodwill Allocated by Reportable Segments (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 370,986	$ 368,133
Goodwill attributable to acquisition		26,931	$ 4,991
Goodwill attributable to acquisition	(441)	(2,138)
Adjustment to goodwill from prior year acquisition	1,099
Goodwill, ending balance	398,575	370,986	368,133
Payment Services - Puerto Rico & Caribbean
Goodwill [Roll Forward]
Goodwill, beginning balance	160,972	160,972
Goodwill attributable to acquisition		0	0
Goodwill attributable to acquisition	0	0
Adjustment to goodwill from prior year acquisition	0
Goodwill, ending balance	160,972	160,972	160,972
Payment Services - Latin America
Goodwill [Roll Forward]
Goodwill, beginning balance	25,716	22,524
Goodwill attributable to acquisition		26,931	4,991
Goodwill attributable to acquisition	(87)	(1,799)
Adjustment to goodwill from prior year acquisition	1,099
Goodwill, ending balance	53,659	25,716	22,524
Merchant Acquiring, net
Goodwill [Roll Forward]
Goodwill, beginning balance	138,121	138,121
Goodwill attributable to acquisition		0	0
Goodwill attributable to acquisition	0	0
Adjustment to goodwill from prior year acquisition	0
Goodwill, ending balance	138,121	138,121	138,121
Business Solutions
Goodwill [Roll Forward]
Goodwill, beginning balance	46,177	46,516
Goodwill attributable to acquisition		0	0
Goodwill attributable to acquisition	(354)	(339)
Adjustment to goodwill from prior year acquisition	0
Goodwill, ending balance	$ 45,823	$ 46,177	$ 46,516