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Number Of States In Which Policies Are Offered

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Related Party Transaction, Transaction Term

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Cash received for commissions during the current period.

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Related-Party Transactions - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026 USD ($) state	Sep. 30, 2025 USD ($)	Sep. 30, 2026 USD ($) state	Sep. 30, 2025 USD ($)	Dec. 31, 2025 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2020 USD ($)
Related Party Transaction [Line Items]
Restricted cash and cash equivalents	$ 132,767	$ 172,261	$ 132,767	$ 172,261	$ 138,823
Contract liabilities	51,560		51,560		46,450
State Farm Term Loan \| 2025 JPM Credit Facility
Related Party Transaction [Line Items]
Fixed rate (as a percent)						8.00%
State Farm Term Loan \| 2025 JPM Credit Facility \| Hagerty Reinsurance Ltd
Related Party Transaction [Line Items]
Debt face amount						$ 25,000
Reinsurance Agreement \| Affiliated Entity \| Essentia
Related Party Transaction [Line Items]
Restricted cash and cash equivalents	$ 471,900		$ 471,900		$ 680,400
Alliance Agreement \| Affiliated Entity \| State Farm
Related Party Transaction [Line Items]
Related party transaction, transaction term (in year)			10 years
Number of states in which policies are offered \| state	40		40
Number of states in which conversions of existing book of business occur \| state	26		26
Contract liabilities							$ 20,000
Commission revenue	$ 8,100	$ 4,100	$ 21,600	$ 7,100