Loans and Finance Receivables - Components of Company-owned Loans and Finance Receivables At Fair Value (Detail) - USD ($) $ in Thousands |
Sep. 30, 2026 |
Jun. 30, 2026 |
Dec. 31, 2025 |
Sep. 30, 2025 |
Jun. 30, 2025 |
Dec. 31, 2024 |
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| Accounts Notes And Loans Receivable [Line Items] | |||||||||||
| Principal balance - accrual | $ 5,154,819 | $ 4,374,977 | $ 3,996,558 | ||||||||
| Principal balance - non-accrual | 535,510 | 373,037 | 348,343 | ||||||||
| Total principal balance | 5,690,329 | 4,748,014 | 4,344,901 | ||||||||
| Accrued interest and fees | 187,412 | 154,273 | 155,459 | ||||||||
| Loans and finance receivables at fair value - accrual | 6,269,382 | 5,245,037 | 4,806,373 | ||||||||
| Loans and finance receivables at fair value - non-accrual | 326,585 | 226,507 | 206,480 | ||||||||
| Loans and finance receivables at fair value | 6,595,967 | [1] | $ 6,172,764 | 5,471,544 | [1] | 5,012,853 | [1] | $ 4,773,315 | $ 4,386,444 | ||
| Difference between principal balance and fair value | 905,638 | 723,530 | 667,952 | ||||||||
| Consumer | |||||||||||
| Accounts Notes And Loans Receivable [Line Items] | |||||||||||
| Principal balance - accrual | 1,526,370 | 1,294,991 | 1,226,886 | ||||||||
| Principal balance - non-accrual | 205,848 | 151,947 | 169,725 | ||||||||
| Total principal balance | 1,732,218 | 1,446,938 | 1,396,611 | ||||||||
| Accrued interest and fees | 160,942 | 126,825 | 129,378 | ||||||||
| Loans and finance receivables at fair value - accrual | 2,039,335 | 1,694,851 | 1,615,085 | ||||||||
| Loans and finance receivables at fair value - non-accrual | 91,592 | 69,618 | 79,754 | ||||||||
| Loans and finance receivables at fair value | 2,130,927 | 1,916,671 | 1,764,469 | 1,694,839 | 1,668,336 | 1,639,307 | |||||
| Difference between principal balance and fair value | 398,709 | 317,531 | 298,228 | ||||||||
| Small Business | |||||||||||
| Accounts Notes And Loans Receivable [Line Items] | |||||||||||
| Principal balance - accrual | 3,628,449 | 3,079,986 | 2,769,672 | ||||||||
| Principal balance - non-accrual | 329,662 | 221,090 | 178,618 | ||||||||
| Total principal balance | 3,958,111 | 3,301,076 | 2,948,290 | ||||||||
| Accrued interest and fees | 26,470 | 27,448 | 26,081 | ||||||||
| Loans and finance receivables at fair value - accrual | 4,230,047 | 3,550,186 | 3,191,288 | ||||||||
| Loans and finance receivables at fair value - non-accrual | 234,993 | 156,889 | 126,726 | ||||||||
| Loans and finance receivables at fair value | 4,465,040 | $ 4,256,093 | 3,707,075 | 3,318,014 | $ 3,104,979 | $ 2,747,137 | |||||
| Difference between principal balance and fair value | $ 506,929 | $ 405,999 | $ 369,724 | ||||||||
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