Allowance for Credit Losses on Premiums Receivable (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Premium Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 20,000	$ 17,100	$ 18,900	$ 16,100
Current period change for expected credit losses	2,488	1,515	4,272	3,425
Write-offs charged against the allowance for credit losses	(1,720)	(1,047)	(2,776)	(2,211)
Recoveries	332	332	704	586
Allowance for credit losses, end of period	$ 21,100	$ 17,900	$ 21,100	$ 17,900