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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
 12 Months Ended
Dec. 31, 2021
USD ($)
Contract
 [1]
Financing Receivable, Modifications [Line Items]  
Troubled debt restructurings, Number of Loans | Contract 4
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment $ 7,340
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment 7,340
Troubled debt restructurings, Outstanding Recorded Investment 4,253
Troubled debt restructurings, Financial Effect Resulting From Modifications $ 0 [2]
Commercial Real Estate Owner Occupied [Member] | Interest rate reduction [Member]  
Financing Receivable, Modifications [Line Items]  
Troubled debt restructurings, Number of Loans | Contract 1
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment $ 2,453
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment 2,453
Troubled debt restructurings, Outstanding Recorded Investment 2,394
Troubled debt restructurings, Financial Effect Resulting From Modifications $ 0 [2]
Commercial Real Estate Owner Occupied [Member] | Change in Amortization Period or Maturity [Member]  
Financing Receivable, Modifications [Line Items]  
Troubled debt restructurings, Number of Loans | Contract 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment 0
Troubled debt restructurings, Outstanding Recorded Investment 0
Troubled debt restructurings, Financial Effect Resulting From Modifications $ 0 [2]
Commercial and Industrial [Member] | Interest rate reduction [Member]  
Financing Receivable, Modifications [Line Items]  
Troubled debt restructurings, Number of Loans | Contract 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment 0
Troubled debt restructurings, Outstanding Recorded Investment 0
Troubled debt restructurings, Financial Effect Resulting From Modifications $ 0 [2]
Commercial and Industrial [Member] | Change in Amortization Period or Maturity [Member]  
Financing Receivable, Modifications [Line Items]  
Troubled debt restructurings, Number of Loans | Contract 3
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment $ 4,887
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment 4,887
Troubled debt restructurings, Outstanding Recorded Investment 1,859
Troubled debt restructurings, Financial Effect Resulting From Modifications $ 0 [2]
SFR Mortgage [Member] | Interest rate reduction [Member]  
Financing Receivable, Modifications [Line Items]  
Troubled debt restructurings, Number of Loans | Contract 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment 0
Troubled debt restructurings, Outstanding Recorded Investment 0
Troubled debt restructurings, Financial Effect Resulting From Modifications $ 0 [2]
SFR Mortgage [Member] | Change in Amortization Period or Maturity [Member]  
Financing Receivable, Modifications [Line Items]  
Troubled debt restructurings, Number of Loans | Contract 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment 0
Troubled debt restructurings, Outstanding Recorded Investment 0
Troubled debt restructurings, Financial Effect Resulting From Modifications $ 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.