General - Allowance for Credit Losses on Premium Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Beginning balance	$ 5,400	$ 6,000	$ 5,800	$ 6,000
Provision during the period for expected credit losses	537	1,153	2,005	3,330
Write-off amounts during the period	(863)	(1,311)	(3,010)	(3,798)
Recoveries during the period of amounts previously written off	126	158	405	468
Ending balance	$ 5,200	$ 6,000	$ 5,200	$ 6,000