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Loans to Bank Customers - Credit Quality Indicators (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Non-Classified |  |
Outstanding Loans [Line Items] |  |
Total loans | $ 47,435 | $ 39,214
Classified |  |
Outstanding Loans [Line Items] |  |
Total loans | 2,570 | 2,703
Residential | Non-Classified |  |
Outstanding Loans [Line Items] |  |
Total loans | 5,717 | 5,046
Residential | Classified |  |
Outstanding Loans [Line Items] |  |
Total loans | 46 | 49
Commercial | Non-Classified |  |
Outstanding Loans [Line Items] |  |
Total loans | 12,811 | 2,716
Commercial | Classified |  |
Outstanding Loans [Line Items] |  |
Total loans | 0 | 0
Installment | Non-Classified |  |
Outstanding Loans [Line Items] |  |
Total loans | 4,194 | 4,278
Installment | Classified |  |
Outstanding Loans [Line Items] |  |
Total loans | 76 | 79
Consumer | Non-Classified |  |
Outstanding Loans [Line Items] |  |
Total loans | 17,795 | 20,019
Consumer | Classified |  |
Outstanding Loans [Line Items] |  |
Total loans | 0 | 0
Secured credit card | Non-Classified |  |
Outstanding Loans [Line Items] |  |
Total loans | 6,918 | 7,155
Secured credit card | Classified |  |
Outstanding Loans [Line Items] |  |
Total loans | $ 2,448 | $ 2,575

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