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Transfers and Servicing of Financial Assets (Loans sold) (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Mortgage banking activities $ 86 $ 1,525 $ 616 $ 5,486
Consumer        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Origination fees 22 313 194 1,231
Mortgage banking activities 86 1,525 616 5,486
Consumer | Residential        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Net gain on sale 26 1,063 529 4,523
Fair value adjustment 38 149 (107) (268)
Proceeds from sale 1,053 52,256 33,886 199,991
Consumer | Loans sold with servicing rights retained        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Proceeds from sale $ 147 $ 50,643 $ 30,464 $ 192,421