Reinsurance (Ceded earned premiums to GEP & Assumed earned premiums to NEP) (Details) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] | ||||
| Percentage of ceded earned premiums to gross earned premiums | 49.00% | 53.00% | 47.00% | 47.00% |
| Percentage of assumed earned premiums to net earned premiums | 51.00% | 71.00% | 42.00% | 47.00% |
| Underwriting | ||||
| SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] | ||||
| Percentage of ceded earned premiums to gross earned premiums | 16.00% | 19.00% | 19.00% | 20.00% |
| Percentage of assumed earned premiums to net earned premiums | 15.00% | 21.00% | 16.00% | 21.00% |