Revenue from Contract with Customer (Details)	12 Months Ended
	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