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Commitment and Contingencies - Gross Written Premium (Details) - Premiums Written Gross - Customer Concentration Risk	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
AmWINS Group, Inc.
Concentration Risk [Line Items]
Concentration risk, percentage	23.30%	11.90%
Ryan Specialty Group Holdings, Inc.
Concentration Risk [Line Items]
Concentration risk, percentage	22.20%	29.00%
Marsh & McLennan Companies
Concentration Risk [Line Items]
Concentration risk, percentage	12.80%	14.00%

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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.

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