Contract Assets - Summary Of Contract Assets (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Contract With Customer, Asset [Roll Forward]
Beginning balance	$ 106,748		$ 112,956
Increase due to new business generation	48,991		145,635
Change in estimates of revenue from performance obligations satisfied in previous periods	1,670	$ 7,500	7,135	$ 24,400
Receivables transferred from contract assets upon billing the lending institutions	(20,830)		(60,808)
Payments received from insurance carriers	(36,646)		(105,038)
Provision for expected credit losses	7		60
Ending balance	99,940		99,940
Profit Share
Contract With Customer, Asset [Roll Forward]
Beginning balance	98,672		105,486
Increase due to new business generation	24,853		76,855
Change in estimates of revenue from performance obligations satisfied in previous periods	1,670		7,135
Receivables transferred from contract assets upon billing the lending institutions	0		0
Payments received from insurance carriers	(34,446)		(98,773)
Provision for expected credit losses	8		54
Ending balance	90,757		90,757
TPA Fees
Contract With Customer, Asset [Roll Forward]
Beginning balance	1,437		1,316
Increase due to new business generation	2,293		6,478
Change in estimates of revenue from performance obligations satisfied in previous periods	0		0
Receivables transferred from contract assets upon billing the lending institutions	0		0
Payments received from insurance carriers	(2,200)		(6,265)
Provision for expected credit losses	0		1
Ending balance	1,530		1,530
Program Fees
Contract With Customer, Asset [Roll Forward]
Beginning balance	6,639		6,154
Increase due to new business generation	21,845		62,302
Change in estimates of revenue from performance obligations satisfied in previous periods	0		0
Receivables transferred from contract assets upon billing the lending institutions	(20,830)		(60,808)
Payments received from insurance carriers	0		0
Provision for expected credit losses	(1)		5
Ending balance	$ 7,653		$ 7,653