Segment Reporting and Major Customers - Operating Results (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting
Share-based compensation expense	$ 11,008	$ 12,566	$ 20,055	$ 20,723
Operating income	193,248	135,821	360,431	287,508
Nonoperating expenses, net	(30,042)	(29,760)	(59,945)	(51,857)
Income before income taxes and equity in income of equity investments	163,206	106,061	300,486	235,651
Net revenue	844,068	794,937	1,676,960	1,466,581
Add: reimbursable items, interchange and assessment expenses	378,307	356,650	730,140	424,384
Total revenues	1,222,375	1,151,587	2,407,100	1,890,965
Issuer Solutions
Segment Reporting
Total revenues	431,365	422,111	855,247	839,312
Merchant Solutions
Segment Reporting
Total revenues	608,373	567,535	1,172,158	705,514
Netspend
Segment Reporting
Total revenues	182,637	161,941	379,695	346,139
Operating Segments
Segment Reporting
Adjusted operating income	259,281	227,549	497,509	413,716
Income before income taxes and equity in income of equity investments	163,206	106,061	300,486	235,651
Net revenue	$ 854,413	$ 801,949	$ 1,699,694	$ 1,485,563
Operating margin on net revenue	30.70%	28.60%	29.70%	28.20%
Operating Segments | Issuer Solutions
Segment Reporting
Adjusted operating income	$ 147,277	$ 128,493	$ 281,150	$ 263,570
Net revenue	$ 392,760	$ 377,862	$ 780,015	$ 755,871
Operating margin on net revenue	37.50%	34.00%	36.00%	34.90%
Operating Segments | Merchant Solutions
Segment Reporting
Adjusted operating income	$ 101,996	$ 89,915	$ 193,275	$ 128,272
Net revenue	$ 278,588	$ 261,467	$ 539,149	$ 382,079
Operating margin on net revenue	36.60%	34.40%	35.90%	33.60%
Operating Segments | Netspend
Segment Reporting
Adjusted operating income	$ 46,044	$ 42,481	$ 94,692	$ 84,682
Net revenue	$ 183,065	$ 162,620	$ 380,530	$ 347,613
Operating margin on net revenue	25.20%	26.10%	24.90%	24.40%
Corporate Administration and Other
Segment Reporting
Adjusted operating income	$ (36,036)	$ (33,340)	$ (71,608)	$ (62,808)
Intersegment
Segment Reporting
Net revenue	(10,345)	(7,012)	(22,734)	(18,982)
Segment Reconciling Items
Segment Reporting
TransFirst M&A and integration expenses	4,165	20,676	9,034	24,078
Litigation, claims, judgements or settlements	(83)		1,878
Acquisition intangible amortization	$ 50,943	$ 58,486	$ 106,111	$ 81,407