Nature of Operations and Basis of Presentation - Deferred Policy Acquisition Costs (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at beginning of period	$ 104,225
Underwriting costs deferred	63,099
Amortization of deferred policy acquisition costs	(59,835)
Recorded asset at ending of period	$ 107,489