Segment Reporting - Balance Sheet Data (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting
Total assets	$ 213,487	$ 207,204
Operating Segments
Segment Reporting
Total assets	213,487	207,204
Operating Segments | U.S. Debit and Credit
Segment Reporting
Total assets	176,496	169,567
Operating Segments | U.S. Prepaid Debit
Segment Reporting
Total assets	25,259	25,117
Operating Segments | Other
Segment Reporting
Total assets	$ 11,732	$ 12,520