Segment Reporting - Revenue and EBITDA from Continuing Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting
Revenue	$ 71,681	$ 70,987	$ 205,448	$ 187,298
EBITDA	12,208	8,968	33,096	18,879
U.S. Debit and Credit
Segment Reporting
EBITDA	11,417	9,136	32,387	24,788
U.S. Prepaid Debit
Segment Reporting
EBITDA	8,342	8,831	20,001	18,337
Other
Segment Reporting
EBITDA	(7,551)	(8,999)	(19,292)	(24,246)
Operating Segments | U.S. Debit and Credit
Segment Reporting
Revenue	51,502	48,002	151,517	128,992
Operating Segments | U.S. Prepaid Debit
Segment Reporting
Revenue	20,452	21,190	53,162	52,128
Operating Segments | Other
Segment Reporting
Revenue		1,920	1,679	7,599
Intersegment eliminations
Segment Reporting
Revenue	$ (273)	$ (125)	$ (910)	$ (1,421)