Variable Interest Entities - Narrative (Details) - USD ($) $ in Millions |
6 Months Ended | ||
|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| Variable Interest Entity [Line Items] | |||
| Trust asset | $ 34.0 | $ 28.6 | |
| Percentage of outstanding equity interests (as a percent) | 50.00% | ||
| Maximum exposure to trusts | $ 36.4 | ||
| Reimbursement obligation coverage (as a percent) | 12.00% | ||
| MW Advisor, LLC | |||
| Variable Interest Entity [Line Items] | |||
| Ownership percentage (as a percent) | 50.00% | ||
| Marathon Direct Lending SLP, LLC | |||
| Variable Interest Entity [Line Items] | |||
| Ownership percentage (as a percent) | 50.00% | ||
| Variable Interest Entity, Not Primary Beneficiary | |||
| Variable Interest Entity [Line Items] | |||
| Deposits assumed | $ 51.2 | $ 99.1 | |
| Non-marketable investment carrying value | 285.8 | $ 271.1 | |
| Variable Interest Entity, Not Primary Beneficiary | Unfunded Loan Commitment | |||
| Variable Interest Entity [Line Items] | |||
| Maximum exposure to loss | $ 411.7 | $ 401.2 | |