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Revenue - Narrative (Details) - Markel - Alliance Agreement - Affiliated Entity		1 Months Ended	11 Months Ended
	Jan. 01, 2023	Dec. 31, 2023	Nov. 30, 2023	Jan. 01, 2024
Capitalized Contract Cost [Line Items]
Base commission rate		37.00%	32.00%
Reinsured risk, ceded, percentage	10.00%
CUC rate expected to be paid				80.00%
Minimum
Capitalized Contract Cost [Line Items]
Profit share commission rate		(5.00%)
Maximum
Capitalized Contract Cost [Line Items]
Profit share commission rate		5.00%

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Base Commission Rate

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- Definition

Contingent Underwriting Commissions Rate Expected to be Paid

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- Definition

Profit Share Commission Rate

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 340
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479483/340-40-50-3

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- Definition

Percentage of risk ceded to reinsurer in excess of risk undertaken originally by insurer that is not ceded to reinsurer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479838/944-20-50-3

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