Description of Business (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | 12 Months Ended |
|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2026 |
Dec. 31, 2025 |
|
| Member Hubs Holding, LLC | |||
| Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] | |||
| Revaluation loss on previously held equity method | $ 2.3 | ||
| Hagerty Reinsurance Limited | |||
| Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] | |||
| Ownership percentage by Hagerty, Inc increase in one year | 100.00% | 80.00% |