Segment Reporting and Major Customers - Geographic Revenues to External Revenues (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Geographic revenues to external revenues by operating segment
Total revenues	$ 1,247,576	$ 1,146,888	$ 3,654,676	$ 3,037,853
United States
Geographic revenues to external revenues by operating segment
Total revenues	1,066,514	989,608	3,135,830	2,553,034
Europe
Geographic revenues to external revenues by operating segment
Total revenues	80,541	74,884	237,226	225,841
Canada
Geographic revenues to external revenues by operating segment
Total revenues	79,479	66,024	235,059	209,269
Other
Geographic revenues to external revenues by operating segment
Total revenues	21,042	16,372	46,561	49,709
Issuer Solutions
Geographic revenues to external revenues by operating segment
Total revenues	442,230	420,918	1,297,478	1,260,231
Issuer Solutions | United States
Geographic revenues to external revenues by operating segment
Total revenues	261,878	264,062	780,728	776,671
Issuer Solutions | Europe
Geographic revenues to external revenues by operating segment
Total revenues	80,492	74,827	237,039	225,677
Issuer Solutions | Canada
Geographic revenues to external revenues by operating segment
Total revenues	79,098	65,839	234,055	208,762
Issuer Solutions | Other
Geographic revenues to external revenues by operating segment
Total revenues	20,762	16,190	45,656	49,121
Merchant Solutions
Geographic revenues to external revenues by operating segment
Total revenues	625,858	571,220	1,798,015	1,276,733
Merchant Solutions | United States
Geographic revenues to external revenues by operating segment
Total revenues	625,148	570,796	1,795,919	1,275,474
Merchant Solutions | Europe
Geographic revenues to external revenues by operating segment
Total revenues	49	57	187	164
Merchant Solutions | Canada
Geographic revenues to external revenues by operating segment
Total revenues	381	185	1,004	507
Merchant Solutions | Other
Geographic revenues to external revenues by operating segment
Total revenues	280	182	905	588
Netspend
Geographic revenues to external revenues by operating segment
Total revenues	179,488	154,750	559,183	500,889
Netspend | United States
Geographic revenues to external revenues by operating segment
Total revenues	$ 179,488	$ 154,750	$ 559,183	$ 500,889