v3.26.3
Finance Receivables, Credit Quality Information, and Allowance for Credit Losses - Changes in Allowance for Credit Losses (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Beginning balance $ 224,000 $ 202,800 $ 220,900 $ 199,500  
Provision for credit losses 66,163 60,474 200,037 179,053  
Credit losses (64,754) (55,298) (206,177) (177,535)  
Recoveries 5,391 4,024 16,040 10,982  
Ending balance 230,800 212,000 230,800 212,000  
Net finance receivables $ 2,209,925 $ 2,053,017 $ 2,209,925 $ 2,053,017 $ 2,140,199
Allowance as Percentage of Finance Receivables 10.40% 10.30% 10.40% 10.30%  
Large [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Beginning balance $ 162,000 $ 138,110 $ 152,300 $ 133,506  
Provision for credit losses 45,873 35,215 133,894 105,904  
Credit losses (40,576) (31,332) (125,789) (101,727)  
Recoveries 3,503 2,537 10,395 6,847  
Ending balance 170,800 144,530 170,800 144,530  
Net finance receivables $ 1,742,013 $ 1,512,140 $ 1,742,013 $ 1,512,140 1,593,171
Allowance as Percentage of Finance Receivables 9.80% 9.60% 9.80% 9.60%  
Small [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Beginning balance $ 62,000 $ 64,690 $ 68,600 $ 65,994  
Provision for credit losses 20,290 25,259 66,143 73,149  
Credit losses (24,178) (23,966) (80,388) (75,808)  
Recoveries 1,888 1,487 5,645 4,135  
Ending balance 60,000 67,470 60,000 67,470  
Net finance receivables $ 467,912 $ 540,877 $ 467,912 $ 540,877 $ 547,028
Allowance as Percentage of Finance Receivables 12.80% 12.50% 12.80% 12.50%