Unpaid Losses and Loss Adjustment Expenses - Changes in the Liability for Unpaid Losses and Loss Adjustment Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Gross reserves - beginning of period	$ 174,786	$ 145,004	$ 174,612	$ 165,539	$ 165,539
Less: reinsurance recoverables on unpaid losses	(74,358)	(56,505)	(70,807)	(82,651)	(82,651)
Net reserves - beginning of period	100,428	88,499	103,805	82,888	82,888
Add: incurred losses and LAE, net of reinsurance:
Current period	7,284	17,281	30,747	51,004
Prior period	7,868	3,630	10,206	2,939
Total net incurred losses and LAE	15,152	20,911	40,953	53,943
Deduct: loss and LAE payments, net of reinsurance:
Current period	8,481	9,194	18,549	18,635
Prior period	12,054	7,768	31,164	25,748
Total net loss and LAE payments	20,535	16,962	49,713	44,383
Net reserves - end of period	95,045	92,448	95,045	92,448	103,805
Plus: reinsurance recoverables on unpaid losses	65,860	46,766	65,860	46,766	70,807
Gross reserves - end of period	$ 160,905	$ 139,214	$ 160,905	$ 139,214	$ 174,612