Quarterly report pursuant to Section 13 or 15(d)

Mortgage Servicing Rights, at Fair Value - Additional Information (Detail)

v3.22.2
Mortgage Servicing Rights, at Fair Value - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2022
Dec. 31, 2021
Servicing Assets at Fair Value [Line Items]          
Contractually specified servicing fees, late fees, and other ancillary servicing revenue $ 13.1 $ 13.7 $ 13.0 $ 27.4  
Asset Pledged as Collateral with Right [Member]          
Servicing Assets at Fair Value [Line Items]          
Servicing Asset at Fair Value, Amount $ 143.4     $ 143.4 $ 142.4