Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting
Revenues	$ 107,697	$ 77,374	$ 280,543	$ 173,141
EBITDA	29,756	16,681	69,391	31,639
U.S. Debit and Credit
Segment Reporting
EBITDA	23,368	11,180	59,961	22,170
U.S. Prepaid Debit
Segment Reporting
EBITDA	9,973	9,336	19,733	15,314
U.K. Limited
Segment Reporting
EBITDA	1,235	596	2,076	1,410
Other
Segment Reporting
EBITDA	(4,820)	(4,431)	(12,379)	(7,255)
Operating Segments | U.S. Debit and Credit
Segment Reporting
Revenues	72,785	43,069	196,190	92,339
Operating Segments | U.S. Prepaid Debit
Segment Reporting
Revenues	23,659	23,752	53,482	47,050
Operating Segments | U.K. Limited
Segment Reporting
Revenues	9,668	7,808	23,586	24,138
Operating Segments | Other
Segment Reporting
Revenues	3,995	6,310	13,917	17,493
Intersegment eliminations
Segment Reporting
Revenues	$ (2,410)	$ (3,565)	$ (6,632)	$ (7,879)