Segment Reporting - Revenue and EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting
Revenues	$ 86,393	$ 77,310
EBITDA	17,674	15,868
U.S. Debit and Credit
Segment Reporting
EBITDA	18,922	12,581
U.S. Prepaid Debit
Segment Reporting
EBITDA	3,267	5,984
U.K. Limited
Segment Reporting
EBITDA	219	183
Other
Segment Reporting
EBITDA	(4,734)	(2,880)
Operating Segments | U.S. Debit and Credit
Segment Reporting
Revenues	65,091	50,051
Operating Segments | U.S. Prepaid Debit
Segment Reporting
Revenues	12,341	17,431
Operating Segments | U.K. Limited
Segment Reporting
Revenues	6,232	6,239
Operating Segments | Other
Segment Reporting
Revenues	3,142	4,103
Intersegment eliminations
Segment Reporting
Revenues	$ (413)	$ (514)