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v3.25.4

Revenue from Contract with Customer (Details) | 12 Months Ended
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Dec. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2021 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |
Contract with Customer, Asset, after Allowance for Credit Loss | $ 31,757,000 | $ 15,967,000 |  |
Contract with Customer, Liability | 2,954,000 | 2,705,000 |  |
Contract with Customer, Liability, Revenue Recognized | 679,000 | 479,000 | $ 583,000 |
Contract with Customer, Receivable, after Allowance for Credit Loss | 86,609,000 | 55,377,000 |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 143,381,000 | 92,023,000 | 51,281,000 |
Contract with Customer, Performance Obligation Satisfied in Previous Period | $ 2,984,000 | 5,325,000 | 5,241,000 |
Minimum [Member] |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |
Employee Stop Loss Time When Base Commissions Recognized Begin and End In Months | 17 |  |  |
Maximum [Member] |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |
Employee Stop Loss Time When Base Commissions Recognized Begin and End In Months | 20 |  |  |
Accident & Health |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | $ 29,640,000 | 30,123,000 |  | $ 32,836,000
Specialty Automobile |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 17,370,000 | 17,851,000 | 11,929,000 |
Other Professional |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 13,294,000 | 10,076,000 | 3,097,000 |
Marine and Energy |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 4,577,000 | 2,829,000 | 2,909,000 |
Niche Specialty Risks |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 13,263,000 | 5,268,000 | 0 |
Miscellaneous Specialty |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 5,406,000 | 1,696,000 | 363,000 |
Property |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 22,565,000 | 5,116,000 | 0 |
Reinsurance |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 15,713,000 | 1,641,000 | 147,000 |
Professional Directors And Officers Liability Insurance |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 6,995,000 | 1,422,000 | 0 |
Environmental |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 4,251,000 | 13,053,000 | 0 |
Surety Product Line |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | $ 10,307,000 | $ 2,948,000 | $ 0 |

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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-11 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-8 + Details
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