General - Allowance for Credit Losses on Premium Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Beginning balance	$ 6,000	$ 7,000	$ 6,000	$ 10,000
Provision during the period for expected credit losses	1,007	(390)	2,177	(2,532)
Write-off amounts during the period	(1,168)	(757)	(2,487)	(1,771)
Recoveries during the period of amounts previously written off	161	147	310	303
Ending balance	$ 6,000	$ 6,000	$ 6,000	$ 6,000