Segments - Schedule of Apollo’s Revenues (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Segment Reporting Information [Line Items] | ||
| Total gross written premiums | $ 667,704 | $ 535,326 |
| Apollo Segment | ||
| Segment Reporting Information [Line Items] | ||
| Total gross written premiums | 85,900 | $ 0 |
| Total managed premiums | 300,005 | |
| Aligned Syndicates | Apollo Segment | ||
| Segment Reporting Information [Line Items] | ||
| Total managed premiums | 210,549 | |
| Partner Syndicates | Apollo Segment | ||
| Segment Reporting Information [Line Items] | ||
| Total managed premiums | $ 89,456 | |