Unpaid Losses and Loss Adjustment Expenses - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Liability for Claims and Claims Adjustment Expense [Line Items]
Decrease in losses and loss adjustment expenses	$ 4,000,000
Decrease in losses and loss adjustment expenses, percentage	20.90%
Losses and loss adjustment expenses, net	$ 15,281,000	$ 19,319,000	$ 25,801,000	$ 33,032,000
Prior year adjustments	2,800,000	522,000	2,339,000	(691,000)
Development expenses, net	100,428,000	88,499,000	100,428,000	88,499,000	$ 102,019,000	$ 103,805,000	$ 84,261,000	$ 82,888,000
Prior year claims and claims adjustment expenses	9,900,000	4,600,000	9,900,000	4,600,000
Loss Portfolio Transfer (LPT)
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior year claims and claims adjustment expenses	20,000,000	20,000,000	20,000,000	20,000,000
Accident Year 2022 | Personal Line
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior year adjustments		411,000
Accident Year 2021 Through 2022 | Commercial Line
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior year adjustments	2,100,000
Accident Year 2023 | Personal Line
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior year adjustments			$ 747,000
Accident Year 2024
Liability for Claims and Claims Adjustment Expense [Line Items]
Decrease in losses and loss adjustment expenses	$ 6,300,000
Accident Year 2024 | Commercial Line
Liability for Claims and Claims Adjustment Expense [Line Items]
Losses and loss adjustment expenses, net		1,000,000
Accident Year 2024 | Personal Line
Liability for Claims and Claims Adjustment Expense [Line Items]
Losses and loss adjustment expenses, net		4,500,000
Accident Year 2019 and Prior Accident Years | Loss Portfolio Transfer (LPT)
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior year adjustments		2,200,000
Development expenses, net		$ 0		$ 0