Loss and Loss Adjustment Expense Reserves - Incurred and paid claims development (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Insurance [Abstract]
Total incurred losses and loss adjustment expenses, net of reinsurance	$ 216,785
Total paid losses and loss adjustment expenses, net of reinsurance	(143,347)
Liabilities for loss and LAE, net of reinsurance	73,438	$ 23,152	$ 23,385
Reinsurance recoverable on unpaid loss	0	33,941	28,837
Loss and loss adjustment expense reserves	$ 73,438	$ 57,093	$ 52,222