Commitment and Contingencies - Schedules of Gross Written Premium Concentration of Risk (Details) - Premiums Written Gross - Customer Concentration Risk	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
AmWINS Group, Inc.
Concentration Risk [Line Items]
Concentration risk, percentage	27.50%	28.50%
Ryan Specialty Group Holdings, Inc.
Concentration Risk [Line Items]
Concentration risk, percentage	24.70%	20.20%
CRC Insurance Services, Inc.
Concentration Risk [Line Items]
Concentration risk, percentage	11.10%	10.40%
Marsh & McLennan Companies
Concentration Risk [Line Items]
Concentration risk, percentage	9.10%	11.00%

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.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
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-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
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-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
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-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 275
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 954
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-URI https://asc.fasb.org/1943274/2147478785/954-310-50-2

+ Details

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References + Details