Unpaid Losses and Loss Adjustment Expenses - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior year adjustments		$ 24,284,000	$ 19,432,000	$ 15,594,000
Losses and loss adjustment expenses, net		81,440,000	69,861,000	56,228,000
Unpaid losses and loss adjustment expenses		165,539,000	139,085,000	111,270,000	$ 107,246,000
Short-Duration Insurance Contract, Accident Year 2021 [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior year adjustments		1,800,000
Short-Duration Insurance Contract, Accident Year 2020 [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior year adjustments		4,000,000.0
Short-Duration Insurance Contract, Accident Year 2019 [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior year adjustments		9,600,000
Short-Duration Insurance Contracts, Accident Year 2018 [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior year adjustments		5,200,000
Short-Duration Insurance Contracts, Accident Year 2017 [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior year adjustments		$ 3,700,000
Winter Storm Uri
Liability for Claims and Claims Adjustment Expense [Line Items]
Losses and loss adjustment expenses, net	$ 2,000,000.0
Commercial Line
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior year adjustments			18,500,000	15,200,000
Personal Line
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior year adjustments			957,000	352,000
Hospitality
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior year adjustments			12,000,000.0	12,000,000.0
Small Business Lines
Liability for Claims and Claims Adjustment Expense [Line Items]
Prior year adjustments			$ 6,500,000	$ 3,200,000