Acquired Card Receivables - Summary of Transferred Card Receivables by Class (Details) $ in Thousands	Jun. 30, 2021 USD ($)
Acquired Card Receivables [Line Items]
Total	$ 29,525
Current and Less than 30 Days Past Due
Acquired Card Receivables [Line Items]
Total	28,687
30 ~ 59 Days Past Due
Acquired Card Receivables [Line Items]
Total	240
60 ~ 89 Days Past Due
Acquired Card Receivables [Line Items]
Total	165
90 ~ 119 Days Past Due
Acquired Card Receivables [Line Items]
Total	301
Over 119 Days Past Due
Acquired Card Receivables [Line Items]
Total	$ 132