Segment Reporting and Major Customers - Geographic Revenues to External Revenues (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Geographic revenues to external revenues by operating segment
Total revenues	$ 1,222,375	$ 1,151,587	$ 2,407,100	$ 1,890,965
United States
Geographic revenues to external revenues by operating segment
Total revenues	1,048,420	992,491	2,069,315	1,572,058
Europe
Geographic revenues to external revenues by operating segment
Total revenues	86,492	75,160	156,686	144,973
Canada
Geographic revenues to external revenues by operating segment
Total revenues	79,107	73,137	155,579	143,052
Other
Geographic revenues to external revenues by operating segment
Total revenues	8,356	10,799	25,520	30,882
Issuer Solutions
Geographic revenues to external revenues by operating segment
Total revenues	431,365	422,111	855,247	839,312
Issuer Solutions | United States
Geographic revenues to external revenues by operating segment
Total revenues	258,120	263,292	518,849	520,941
Issuer Solutions | Europe
Geographic revenues to external revenues by operating segment
Total revenues	86,433	75,160	156,548	144,973
Issuer Solutions | Canada
Geographic revenues to external revenues by operating segment
Total revenues	78,761	73,072	154,956	142,922
Issuer Solutions | Other
Geographic revenues to external revenues by operating segment
Total revenues	8,051	10,587	24,894	30,476
Merchant Solutions
Geographic revenues to external revenues by operating segment
Total revenues	608,373	567,535	1,172,158	705,514
Merchant Solutions | United States
Geographic revenues to external revenues by operating segment
Total revenues	607,663	567,258	1,170,771	704,978
Merchant Solutions | Europe
Geographic revenues to external revenues by operating segment
Total revenues	59		138
Merchant Solutions | Canada
Geographic revenues to external revenues by operating segment
Total revenues	346	65	623	130
Merchant Solutions | Other
Geographic revenues to external revenues by operating segment
Total revenues	305	212	626	406
Netspend
Geographic revenues to external revenues by operating segment
Total revenues	182,637	161,941	379,695	346,139
Netspend | United States
Geographic revenues to external revenues by operating segment
Total revenues	$ 182,637	$ 161,941	$ 379,695	$ 346,139