Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Detail)

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Acquisitions - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Dec. 31, 2019
Business Acquisition [Line Items]              
Goodwill $ 1,298,796 $ 1,298,324 $ 128,750 $ 121,233 $ 121,754 $ 121,754 $ 121,137
Renovate America Inc [Member]              
Business Acquisition [Line Items]              
Loans held for sale, at fair value 35,226            
Intangible assets 1,890            
Goodwill 5,627            
Other assets, net 753            
Net assets acquired $ 43,496