Loans - Narrative (Details) - USD ($) |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
|
| Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items] | |||
| Transfer of securitization investments qualifying for sale accounting treatment | $ 0 | $ 0 | |
| Provision for credit losses | 8,895,000 | 5,678,000 | |
| Personal loans | |||
| Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items] | |||
| Deconsolidation of debt | 0 | ||
| Student Loans | |||
| Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items] | |||
| Deconsolidation of debt | $ 13,200,000 | ||
| Secured loans | |||
| Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items] | |||
| Secured loans, amortized cost basis | $ 740,000,000.0 | $ 872,300,000 | |
| Secured loan, term, up to | 7 years | ||
| Provision for credit losses | $ 0 | $ 0 | |