Loans to Bank Customers - Schedule of Credit Quality Indicators (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Non-Classified
Outstanding Loans [Line Items]
Total loans	$ 66,180	$ 73,985
Classified
Outstanding Loans [Line Items]
Total loans	2,929	2,768
Residential \| Non-Classified
Outstanding Loans [Line Items]
Total loans	7,424	7,714
Residential \| Classified
Outstanding Loans [Line Items]
Total loans	15	19
Commercial \| Non-Classified
Outstanding Loans [Line Items]
Total loans	2,649	22,688
Commercial \| Classified
Outstanding Loans [Line Items]
Total loans	0	0
Installment \| Non-Classified
Outstanding Loans [Line Items]
Total loans	4,217	4,902
Installment \| Classified
Outstanding Loans [Line Items]
Total loans	1,390	914
Consumer \| Non-Classified
Outstanding Loans [Line Items]
Total loans	44,179	29,901
Consumer \| Classified
Outstanding Loans [Line Items]
Total loans	0	0
Secured credit card \| Non-Classified
Outstanding Loans [Line Items]
Total loans	7,711	8,780
Secured credit card \| Classified
Outstanding Loans [Line Items]
Total loans	$ 1,524	$ 1,835

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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