Segment Reporting and Major Customers - Total Assets by Segment (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Segment Reporting
Total assets	$ 7,774,132	$ 7,468,709
Operating Segments | Issuer Solutions
Segment Reporting
Total assets	7,075,930	6,843,451
Operating Segments | Merchant Solutions
Segment Reporting
Total assets	4,247,317	4,248,183
Operating Segments | Consumer Solutions
Segment Reporting
Total assets	1,419,687	1,374,667
Intersegment
Segment Reporting
Total assets	$ (4,968,802)	$ (4,997,592)