Loans to Bank Customers - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Non-Classified
Outstanding Loans [Line Items]
Total loans	$ 27,930	$ 23,616
Classified
Outstanding Loans [Line Items]
Total loans	2,569	1,209
Residential | Non-Classified
Outstanding Loans [Line Items]
Total loans	4,035	3,481
Residential | Classified
Outstanding Loans [Line Items]
Total loans	229	241
Commercial | Non-Classified
Outstanding Loans [Line Items]
Total loans	2,542	3,392
Commercial | Classified
Outstanding Loans [Line Items]
Total loans	0	0
Installment | Non-Classified
Outstanding Loans [Line Items]
Total loans	1,306	1,228
Installment | Classified
Outstanding Loans [Line Items]
Total loans	101	115
Consumer | Non-Classified
Outstanding Loans [Line Items]
Total loans	14,446	10,032
Consumer | Classified
Outstanding Loans [Line Items]
Total loans	0	0
Secured credit card | Non-Classified
Outstanding Loans [Line Items]
Total loans	5,601	5,483
Secured credit card | Classified
Outstanding Loans [Line Items]
Total loans	$ 2,239	$ 853