Revenue Recognition and Deferred Revenue (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($)
Contract with Customer, Liability, Revenue Recognized	$ 182	$ 479
Revenue from Contract with Customer, Excluding Assessed Tax	36,771	17,729
Contract with Customer, Asset, after Allowance for Credit Loss	20,685		$ 15,967
Contract with Customer, Liability	3,491		$ 2,705
Variable Interest Entity, Primary Beneficiary [Member]
Contract with Customer, Performance Obligation Satisfied in Previous Period	1,981	3,364
Marine and Energy
Revenue from Contract with Customer, Excluding Assessed Tax	1,848	1,133
Accident & Health
Revenue from Contract with Customer, Excluding Assessed Tax	8,151	10,354
Other Property
Revenue from Contract with Customer, Excluding Assessed Tax	5,184	0
Reinsurer, Other
Revenue from Contract with Customer, Excluding Assessed Tax	4,116	113
Directors and Officers Liability Insurance
Revenue from Contract with Customer, Excluding Assessed Tax	1,527	0
Miscellaneous Specialty
Revenue from Contract with Customer, Excluding Assessed Tax	1,963	79
Specialty Automobile
Revenue from Contract with Customer, Excluding Assessed Tax	5,172	3,807
Niche Specialty Risks
Revenue from Contract with Customer, Excluding Assessed Tax	4,027	0
Other Professional
Revenue from Contract with Customer, Excluding Assessed Tax	3,223	2,243
Environmental
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,560	$ 0
Minimum [Member]
Employee Stop Loss Time When Base Commissions Recognized Begin and End In Months	17
Maximum [Member]
Employee Stop Loss Time When Base Commissions Recognized Begin and End In Months	20