Nature of Operations and Basis of Presentation - Deferred Policy Acquisition Costs (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($)
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at beginning of period	$ 104,225
Underwriting costs deferred	137,415
Amortization of deferred policy acquisition costs	(118,991)
Recorded asset at ending of period	$ 122,649