Municipal Bond Guarantee Insurance - Schedule of Net Written Premiums (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Written premiums: | ||
| Direct | $ 0.0 | $ 10.5 |
| Assumed | 6.7 | 0.0 |
| Gross written premiums | 6.7 | 10.5 |
| Earned premiums: | ||
| Direct | 0.0 | 7.3 |
| Assumed | 8.2 | 0.5 |
| Gross earned premiums | $ 8.2 | 7.8 |
| HG Global | ||
| Written premiums: | ||
| Direct | 0.0 | |
| Assumed | 8.9 | |
| Gross written premiums | 8.9 | |
| Earned premiums: | ||
| Direct | 0.0 | |
| Assumed | 6.5 | |
| Gross earned premiums | 6.5 | |
| BAM | ||
| Written premiums: | ||
| Direct | 10.5 | |
| Assumed | 0.0 | |
| Gross written premiums | 10.5 | |
| Earned premiums: | ||
| Direct | 7.3 | |
| Assumed | 0.5 | |
| Gross earned premiums | 7.8 | |
| Eliminations | ||
| Written premiums: | ||
| Direct | 0.0 | |
| Assumed | (8.9) | |
| Gross written premiums | (8.9) | |
| Earned premiums: | ||
| Direct | 0.0 | |
| Assumed | (6.5) | |
| Gross earned premiums | $ (6.5) | |