Reinsurance - Narrative (Details) - USD ($)		1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Nov. 01, 2022	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2021
Effects Of Reinsurance [Line Items]
Ceded premium written			$ 32,859,000	$ 9,395,000	$ 66,077,000	$ 34,490,000
Ceded premiums earned			14,171,000	9,443,000	39,343,000	27,458,000
Reinsurance recoverables on paid losses		$ 6,959,000	6,959,000		6,959,000		$ 6,653,000
Stated net reserves retained		92,448,000	92,448,000	102,808,000	92,448,000	102,808,000	82,888,000	$ 88,499,000	$ 103,227,000	$ 98,741,000
Losses and loss adjustment expenses, net			20,911,000	16,671,000	53,943,000	56,940,000
Prior period			3,630,000	3,130,000	2,939,000	18,175,000
Reinsurance recoverables on unpaid losses		46,766,000	46,766,000	41,749,000	46,766,000	41,749,000	82,651,000	$ 56,505,000	37,769,000	$ 40,344,000
Accident Year 2019
Effects Of Reinsurance [Line Items]
Prior period				$ 2,300,000		$ 14,300,000
Loss Portfolio Transfer (“LPT”) Reinsurance Agreement
Effects Of Reinsurance [Line Items]
Reinsurance recoverables on paid losses		3,500,000	3,500,000		3,500,000		3,800,000
Reinsurance recoverables on unpaid losses		13,700,000	$ 13,700,000		13,700,000		25,900,000
Loss Portfolio Transfer (“LPT”) Reinsurance Agreement | Minimum
Effects Of Reinsurance [Line Items]
Reinsurance recoverables on paid losses	$ 46,300,000
100% Quota Share Reinsurance Agreement
Effects Of Reinsurance [Line Items]
Ceded premium written		$ 30,900,000
Fleming Reinsurance Ltd | Loss Portfolio Transfer (“LPT”) Reinsurance Agreement
Effects Of Reinsurance [Line Items]
Stated net reserves retained									40,800,000
Losses and loss adjustment expenses, net	5,500,000
Amount reinsured	40,800,000
One-time risk fee retained									5,400,000
Fleming Reinsurance Ltd | Loss Portfolio Transfer (“LPT”) Reinsurance Agreement | Maximum
Effects Of Reinsurance [Line Items]
Reinsurance recoverables on paid losses	66,300,000
Fleming Reinsurance Ltd | Loss Portfolio Transfer (“LPT”) Reinsurance Agreement | Accident Year 2019
Effects Of Reinsurance [Line Items]
Reinsurance recoverables on paid losses									66,300,000
Stated net reserves retained									$ 40,800,000
Prior period	$ 20,000,000
100% Cede of Commercial Liability Risks In Excess of $400,000
Effects Of Reinsurance [Line Items]
Amount retained (excess of)					400,000		340,000
Corridor | Agreement Between Cic And Wpic And Fleming Re
Effects Of Reinsurance [Line Items]
Losses and loss adjustment expenses, net					5,500,000		5,500,000
Layer | Agreement Between Cic And Wpic And Fleming Re | Maximum
Effects Of Reinsurance [Line Items]
Losses and loss adjustment expenses, net					20,000,000		20,000,000
Layer | Agreement Between Cic And Wpic And Fleming Re | Minimum
Effects Of Reinsurance [Line Items]
Losses and loss adjustment expenses, net					4,500,000		644,000
Ceded Commercial Property Risks In Excess of $200,000
Effects Of Reinsurance [Line Items]
Amount retained (excess of)					400,000
Ceded Homeowners Specific Risks In Excess of $300,000
Effects Of Reinsurance [Line Items]
Amount retained (excess of)					$ 300,000		300,000
Ceded Commercial Property Risks In Excess of $400,000
Effects Of Reinsurance [Line Items]
Amount retained (excess of)							$ 300,000