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Loans and Lease Finance Receivables and Allowance for Credit Losses - Summary of Loans Modified as Troubled Debt Restructurings (Detail)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
USD ($)
Agreement
Contract
Sep. 30, 2021
USD ($)
Contract
Sep. 30, 2022
USD ($)
Contract
Sep. 30, 2021
USD ($)
Contract
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Troubled debt restructurings, Number of Loans [1] 2 0 2 3
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment [1] $ 3,204 $ 0 $ 3,204 $ 7,096
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment [1] 3,204 0 3,204 7,096
Troubled debt restructurings, Outstanding Recorded Investment [1] 3,204 0 3,204 6,739
Troubled debt restructurings, Financial Effect Resulting From Modifications [1] $ 0 [2] $ 0 [2] $ 0 $ 0 [2]
Commercial Real Estate Owner Occupied [Member] | Interest rate reduction [Member]        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Troubled debt restructurings, Number of Loans [1] 0 0 0 1
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment [1] $ 0 $ 0 $ 0 $ 2,453
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment [1] 0 0 0 2,453
Troubled debt restructurings, Outstanding Recorded Investment [1] 0 0 0 2,446
Troubled debt restructurings, Financial Effect Resulting From Modifications [1] $ 0 [2] $ 0 [2] $ 0 $ 0 [2]
Commercial Real Estate Owner Occupied [Member] | Change in Amortization Period [Member]        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Troubled debt restructurings, Number of Loans [1] 0 0 0 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment [1] $ 0 $ 0 $ 0 $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment [1] 0 0 0 0
Troubled debt restructurings, Outstanding Recorded Investment [1] 0 0 0 0
Troubled debt restructurings, Financial Effect Resulting From Modifications [1] $ 0 [2] $ 0 [2] $ 0 $ 0 [2]
Commercial and Industrial Loans [Member] | Interest rate reduction [Member]        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Troubled debt restructurings, Number of Loans | Contract [1] 0 0 0 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment [1] $ 0 $ 0 $ 0 $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment [1] 0 0 0 0
Troubled debt restructurings, Outstanding Recorded Investment [1] 0 0 0 0
Troubled debt restructurings, Financial Effect Resulting From Modifications [1] $ 0 [2] $ 0 [2] $ 0 $ 0 [2]
Commercial and Industrial Loans [Member] | Change in Amortization Period [Member]        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Troubled debt restructurings, Number of Loans [1] 2 0 2 2
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment [1] $ 3,204 $ 0 $ 3,204 $ 4,643
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment [1] 3,204 0 3,204 4,643
Troubled debt restructurings, Outstanding Recorded Investment [1] 3,204 0 3,204 4,293
Troubled debt restructurings, Financial Effect Resulting From Modifications [1] $ 0 [2] $ 0 [2] $ 0 $ 0 [2]
SFR Mortgage [Member] | Interest rate reduction [Member]        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Troubled debt restructurings, Number of Loans | Contract [1] 0 0 0 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment [1] $ 0 $ 0 $ 0 $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment [1] 0 0 0 0
Troubled debt restructurings, Outstanding Recorded Investment [1] 0 0 0 0
Troubled debt restructurings, Financial Effect Resulting From Modifications [1] $ 0 [2] $ 0 [2] $ 0 $ 0 [2]
SFR Mortgage [Member] | Change in Amortization Period [Member]        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Troubled debt restructurings, Number of Loans | Contract [1] 0 0 0 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment [1] $ 0 $ 0 $ 0 $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment [1] 0 0 0 0
Troubled debt restructurings, Outstanding Recorded Investment [1] 0 0 0 0
Troubled debt restructurings, Financial Effect Resulting From Modifications [1] $ 0 [2] $ 0 [2] $ 0 $ 0 [2]
[1] The tables above exclude modified loans that were paid off prior to the end of the period.
[2] Financial effects resulting from modifications represent charge-offs and current allowance for credit losses at modification date.