Description of Business (Details)	3 Months Ended	12 Months Ended
Mar. 31, 2026	Dec. 31, 2025
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%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration