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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
Mar. 31, 2022
USD ($)
Agreement
Mar. 31, 2021
USD ($)
Agreement
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Troubled debt restructurings, Number of Loans | Agreement [1] 0 2
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment [1] $ 0 $ 4,643
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment [1] 0 4,643
Troubled debt restructurings, Outstanding Recorded Investment [1] 0 4,443
Troubled debt restructurings, Financial Effect Resulting From Modifications [1],[2] $ 0 $ 0
Commercial Real Estate Owner Occupied [Member] | Interest rate reduction [Member]    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Troubled debt restructurings, Number of Loans | Agreement [1] 0 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment [1] $ 0 $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment [1] 0 0
Troubled debt restructurings, Outstanding Recorded Investment [1] 0 0
Troubled debt restructurings, Financial Effect Resulting From Modifications [1],[2] $ 0 $ 0
Commercial Real Estate Owner Occupied [Member] | Change in Amortization Period [Member]    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Troubled debt restructurings, Number of Loans | Agreement [1] 0 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment [1] $ 0 $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment [1] 0 0
Troubled debt restructurings, Outstanding Recorded Investment [1] 0 0
Troubled debt restructurings, Financial Effect Resulting From Modifications [1],[2] $ 0 $ 0
Commercial and Industrial Loans [Member] | Interest rate reduction [Member]    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Troubled debt restructurings, Number of Loans | Agreement [1] 0 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment [1] $ 0 $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment [1] 0 0
Troubled debt restructurings, Outstanding Recorded Investment [1] 0 0
Troubled debt restructurings, Financial Effect Resulting From Modifications [1],[2] $ 0 $ 0
Commercial and Industrial Loans [Member] | Change in Amortization Period [Member]    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Troubled debt restructurings, Number of Loans | Agreement [1] 0 2
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment [1] $ 0 $ 4,643
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment [1] 0 4,643
Troubled debt restructurings, Outstanding Recorded Investment [1] 0 4,443
Troubled debt restructurings, Financial Effect Resulting From Modifications [1],[2] $ 0 $ 0
SFR Mortgage [Member] | Interest rate reduction [Member]    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Troubled debt restructurings, Number of Loans | Agreement [1] 0 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment [1] $ 0 $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment [1] 0 0
Troubled debt restructurings, Outstanding Recorded Investment [1] 0 0
Troubled debt restructurings, Financial Effect Resulting From Modifications [1],[2] $ 0 $ 0
SFR Mortgage [Member] | Change in Amortization Period [Member]    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Troubled debt restructurings, Number of Loans | Agreement [1] 0 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment [1] $ 0 $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment [1] 0 0
Troubled debt restructurings, Outstanding Recorded Investment [1] 0 0
Troubled debt restructurings, Financial Effect Resulting From Modifications [1],[2] $ 0 $ 0
[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.