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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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- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

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