Losses and Loss Adjustment Expenses - Schedule of Liability for Unpaid Claims and Claims Adjustment Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Reserves for losses and LAE, beginning of period	$ 1,141,757	$ 979,549
Less: reinsurance recoverable on unpaid claims, beginning of period	(435,986)	(381,338)
Reserves for losses and LAE, beginning of period, net of reinsurance	705,771	598,211
Incurred, net of reinsurance, related to:
Current period	115,142	89,989
Prior years	0	0
Total incurred, net of reinsurance	115,142	89,989
Paid, net of reinsurance, related to:
Current period	8,744	10,605
Prior years	68,745	62,959
Total paid	77,489	73,564
Net reserves for losses and LAE, end of period	743,424	614,636
Plus: reinsurance recoverable on unpaid claims, end of period	429,752	385,146
Reserves for losses and LAE, end of period	$ 1,173,176	$ 999,782