Revenue from Contract with Customer (Details)	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2020 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract with Customer, Asset, after Allowance for Credit Loss	$ 15,967,000	$ 7,261,000
Contract with Customer, Liability	473,000	527,000
Contract with Customer, Liability, Revenue Recognized	479,000	583,000	$ 523,000
Contract with Customer, Receivable, after Allowance for Credit Loss	55,377,000	9,419,000
Revenue from Contract with Customer, Excluding Assessed Tax	92,023,000	51,281,000	30,695,000
Contract with Customer, Performance Obligation Satisfied in Previous Period	$ 5,325,000	5,241,000	5,816,000
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	$ 30,123,000	32,836,000		$ 28,399,000
Specialty Automobile
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	17,851,000	11,929,000	1,871,000
Other Professional
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	10,076,000	3,097,000	0
Marine and Energy
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,829,000	2,909,000	158,000
Niche Specialty Risks
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	5,268,000	0	0
Miscellaneous Specialty
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	17,697,000	363,000	267,000
Property
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	5,116,000	0	0
Reinsurance
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,641,000	147,000	0
Professional Directors And Officers Liability Insurance
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,422,000	$ 0	$ 0