Contract Assets - Summary of Contract Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Contract With Customer, Asset [Roll Forward]
Beginning balance	$ 33,731		$ 29,314
Increase of contract assets due to new business generation	30,467		95,783
Change in estimates of revenue from performance obligations satisfied in previous periods	(6,960)		(14,764)
Payables (receivables) transferred from contract assets	(11,399)		(41,020)
Payments received from insurance carriers	(5,917)		(29,375)
Provision for expected credit losses	(14)		(30)
Ending balance	39,908		39,908
Profit Share
Contract With Customer, Asset [Roll Forward]
Beginning balance	27,900		22,855
Increase of contract assets due to new business generation	13,782		44,801
Change in estimates of revenue from performance obligations satisfied in previous periods	(6,960)	$ (8,100)	(14,764)	$ (8,500)
Payables (receivables) transferred from contract assets	2,968		3,646
Payments received from insurance carriers	(2,981)		(21,807)
Provision for expected credit losses	(15)		(37)
Ending balance	34,694		34,694
Program Fees
Contract With Customer, Asset [Roll Forward]
Beginning balance	3,629		4,738
Increase of contract assets due to new business generation	14,192		43,377
Change in estimates of revenue from performance obligations satisfied in previous periods	0		0
Payables (receivables) transferred from contract assets	(14,367)		(44,666)
Payments received from insurance carriers	0		0
Provision for expected credit losses	0		5
Ending balance	3,454		3,454
Claims Administration and Other Service Fees
Contract With Customer, Asset [Roll Forward]
Beginning balance	2,202		1,721
Increase of contract assets due to new business generation	2,493		7,605
Change in estimates of revenue from performance obligations satisfied in previous periods	0		0
Payables (receivables) transferred from contract assets	0		0
Payments received from insurance carriers	(2,936)		(7,568)
Provision for expected credit losses	1		2
Ending balance	1,760		1,760
Future Claim Payments and Previous Profit Share Receipts
Contract With Customer, Asset [Roll Forward]
Change in estimates of revenue from performance obligations satisfied in previous periods	$ (3,000)		$ (3,000)