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Auto Loans Receivable - Financing Receivable, Past Due (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
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Financing Receivable, Past Due [Line Items] |  |
Total auto loans receivable | $ 941.8 | $ 451.2
Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total auto loans receivable | 33.0 | 29.2
31-60 Days |  |
Financing Receivable, Past Due [Line Items] |  |
Total auto loans receivable | 23.7 | 20.7
61-90 Days |  |
Financing Receivable, Past Due [Line Items] |  |
Total auto loans receivable | 5.9 | 5.4
Greater than 90 Days |  |
Financing Receivable, Past Due [Line Items] |  |
Total auto loans receivable | 3.4 | 3.1
Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total auto loans receivable | $ 908.8 | $ 422.0

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