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Finance Receivables, Credit Quality Information, and Allowance for Credit Losses - Changes in Allowance for Credit Losses (Detail) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2026 | Mar. 31, 2025 | Dec. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Beginning balance | $ 220,900 | $ 199,500 |
Provision for credit losses | 64,868 | 57,992 |
Credit losses | (71,161) | (61,709) |
Recoveries | 4,893 | 3,317 |
Ending balance | 219,500 | 199,100 |
Net finance receivables | $ 2,104,001 | $ 1,890,351 | $ 2,140,199
Allowance as Percentage of Finance Receivables | 10.40% | 10.50% |
Large [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Beginning balance | $ 152,300 | $ 133,506 |
Provision for credit losses | 42,148 | 34,621 |
Credit losses | (41,942) | (35,755) |
Recoveries | 3,094 | 2,039 |
Ending balance | 155,600 | 134,411 |
Net finance receivables | $ 1,591,528 | $ 1,345,825 | 1,593,171
Allowance as Percentage of Finance Receivables | 9.80% | 10.00% |
Small [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Beginning balance | $ 68,600 | $ 65,994 |
Provision for credit losses | 22,720 | 23,371 |
Credit losses | (29,219) | (25,954) |
Recoveries | 1,799 | 1,278 |
Ending balance | 63,900 | 64,689 |
Net finance receivables | $ 512,473 | $ 544,526 | $ 547,028
Allowance as Percentage of Finance Receivables | 12.50% | 11.90% |

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