Description of Business and Summary of Significant Accounting Policies - Deferred Policy Acquisition Costs (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Capitalized costs	$ 51,795
Amortized costs	(18,781)
Deferred Policy Acquisition Cost, Ending Balance	33,014
Ceded deferred policy acquisition costs	(29,026)
Deferred Policy Acquisition Cost, Net	$ 3,988