Goodwill and Other Intangible Assets - Goodwill by Reporting Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill	$ 71,996	$ 73,123	$ 73,801
Operating Segments | U.S. Debit and Credit
Goodwill	64,330	64,330
Operating Segments | U.K. Limited
Goodwill	5,908	7,089
Operating Segments | Other
Goodwill	$ 1,758	$ 1,704