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Finance Receivables, Credit Quality Information, and Allowance for Credit Losses - Summary of Contractual Delinquencies of Loans that were Modified to Borrowers Experiencing Financial Difficulty (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024 | Mar. 31, 2024
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Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Contractual delinquencies of loans | $ 83,303 |  | $ 88,830 |  |
Contractual Delinquencies of Loans that were Modified to Borrowers [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Contractual delinquencies of loans | 25,576 | [1] |  | $ 16,648 | [2]
Small Loans [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Contractual delinquencies of loans | 33,133 |  | 34,465 |  |
Small Loans [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Contractual delinquencies of loans | 5,464 | [1] |  | 2,449 | [2]
Large Loans [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Contractual delinquencies of loans | 50,071 |  | $ 54,228 |  |
Large Loans [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Contractual delinquencies of loans | 20,112 | [1] |  | 14,199 | [2]
Financing Receivables, Current [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Contractual delinquencies of loans | 19,958 |  |  | 13,948 |
Financing Receivables, Current [Member] | Small Loans [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Contractual delinquencies of loans | 3,929 |  |  | 2,024 |
Financing Receivables, Current [Member] | Large Loans [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Contractual delinquencies of loans | 16,029 |  |  | 11,924 |
Financing Receivables, 30 - 89 Days Past Due [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Contractual delinquencies of loans | 3,002 |  |  | 1,150 |
Financing Receivables, 30 - 89 Days Past Due [Member] | Small Loans [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Contractual delinquencies of loans | 751 |  |  | 216 |
Financing Receivables, 30 - 89 Days Past Due [Member] | Large Loans [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Contractual delinquencies of loans | 2,251 |  |  | 934 |
Financing Receivables, 90+ Days Past Due [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Contractual delinquencies of loans | 2,616 |  |  | 1,550 |
Financing Receivables, 90+ Days Past Due [Member] | Small Loans [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Contractual delinquencies of loans | 784 |  |  | 209 |
Financing Receivables, 90+ Days Past Due [Member] | Large Loans [Member] | Contractual Delinquencies of Loans that were Modified to Borrowers [Member] |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |
Contractual delinquencies of loans | $ 1,832 |  |  | $ 1,341 |
[1] | Excludes modified finance receivables that subsequently charged off of $1.8 million and $0.4 million in large and small loans, respectively
[2] | Excludes modified finance receivables that subsequently charged off of $1.2 million and $0.3 million in large and small loans, respectively.

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