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Finance Receivables, Credit Quality Information, and Allowance for Credit Losses - Amortized Cost Basis in Past-Due Loans (Detail) - USD ($) $ in Thousands | Mar. 31, 2026 | Dec. 31, 2025 | Mar. 31, 2025
--- | --- | --- | ---
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 2,104,001 | $ 2,140,199 | $ 1,890,351
Net finance receivables in nonaccrual status | $ 95,794 | $ 100,620 |
Total net finance receivables, Percent | 100.00% | 100.00% |
Net finance receivables in nonaccrual status, Percent | 4.60% | 4.70% |
Large Loans [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 1,591,528 | $ 1,593,171 | 1,345,825
Net finance receivables in nonaccrual status | $ 61,117 | $ 62,351 |
Total net finance receivables, Percent | 100.00% | 100.00% |
Net finance receivables in nonaccrual status, Percent | 3.80% | 3.90% |
Small Loans [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 512,473 | $ 547,028 | $ 544,526
Net finance receivables in nonaccrual status | $ 34,677 | $ 38,269 |
Total net finance receivables, Percent | 100.00% | 100.00% |
Net finance receivables in nonaccrual status, Percent | 6.80% | 7.00% |
Financing Receivables, Current [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 1,801,192 | $ 1,809,107 |
Current, Percent | 85.60% | 84.50% |
Financing Receivables, Current [Member] | Large Loans [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 1,386,037 | $ 1,372,102 |
Current, Percent | 87.10% | 86.10% |
Financing Receivables, Current [Member] | Small Loans [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 415,155 | $ 437,005 |
Current, Percent | 81.00% | 79.90% |
1 to 29 Days Past Due [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 151,875 | $ 169,858 |
Past due, Percent | 7.20% | 8.00% |
1 to 29 Days Past Due [Member] | Large Loans [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 110,299 | $ 121,113 |
Past due, Percent | 6.90% | 7.60% |
1 to 29 Days Past Due [Member] | Small Loans [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 41,576 | $ 48,745 |
Past due, Percent | 8.10% | 8.90% |
Delinquent Accounts 30 to 59 Days [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 35,235 | $ 41,235 |
Past due, Percent | 1.70% | 1.90% |
Delinquent Accounts 30 to 59 Days [Member] | Large Loans [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 22,722 | $ 26,940 |
Past due, Percent | 1.40% | 1.70% |
Delinquent Accounts 30 to 59 Days [Member] | Small Loans [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 12,513 | $ 14,295 |
Past due, Percent | 2.40% | 2.60% |
Delinquent Accounts 60 to 89 Days [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 32,251 | $ 37,158 |
Past due, Percent | 1.50% | 1.70% |
Delinquent Accounts 60 to 89 Days [Member] | Large Loans [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 20,156 | $ 23,576 |
Past due, Percent | 1.30% | 1.50% |
Delinquent Accounts 60 to 89 Days [Member] | Small Loans [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 12,095 | $ 13,582 |
Past due, Percent | 2.40% | 2.50% |
Delinquent Accounts 90 to 119 Days [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 28,331 | $ 30,818 |
Past due, Percent | 1.40% | 1.50% |
Delinquent Accounts 90 to 119 Days [Member] | Large Loans [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 17,478 | $ 18,957 |
Past due, Percent | 1.10% | 1.20% |
Delinquent Accounts 90 to 119 Days [Member] | Small Loans [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 10,853 | $ 11,861 |
Past due, Percent | 2.20% | 2.20% |
Delinquent Accounts 120 to 149 Days [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 27,198 | $ 27,765 |
Past due, Percent | 1.30% | 1.30% |
Delinquent Accounts 120 to 149 Days [Member] | Large Loans [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 17,411 | $ 16,715 |
Past due, Percent | 1.10% | 1.00% |
Delinquent Accounts 120 to 149 Days [Member] | Small Loans [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 9,787 | $ 11,050 |
Past due, Percent | 1.90% | 2.00% |
Delinquent Accounts 150 to 179 Days [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 27,919 | $ 24,258 |
Past due, Percent | 1.30% | 1.10% |
Delinquent Accounts 150 to 179 Days [Member] | Large Loans [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 17,425 | $ 13,768 |
Past due, Percent | 1.10% | 0.90% |
Delinquent Accounts 150 to 179 Days [Member] | Small Loans [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 10,494 | $ 10,490 |
Past due, Percent | 2.00% | 1.90% |
Total Delinquency Accounts [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 150,934 | $ 161,234 |
Past due, Percent | 7.20% | 7.50% |
Total Delinquency Accounts [Member] | Large Loans [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 95,192 | $ 99,956 |
Past due, Percent | 6.00% | 6.30% |
Total Delinquency Accounts [Member] | Small Loans [Member] |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |
Net finance receivables | $ 55,742 | $ 61,278 |
Past due, Percent | 10.90% | 11.20% |

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