Related Party Transactions - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($) office Property	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) office Property	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Related Party Transaction [Line Items]
Property from a related party | Property	1		1
Operating leases, rent expense	$ 341	$ 404	$ 1,328	$ 1,204
Office properties | office	1		1
Due to related parties, current	$ 0		$ 0		$ 30,000
Advisory Services Agreement
Related Party Transaction [Line Items]
Related party transaction, general and administrative expenses from transactions with related party	200	500	1,200	1,600
Due to related parties, current					500
Leased Property From Related Party
Related Party Transaction [Line Items]
Operating leases, rent expense	100	$ 200	300	$ 700
MeridianLink
Related Party Transaction [Line Items]
Due to related parties, current	$ 25,700		$ 25,700		$ 30,000