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Loans and Lease Finance Receivables and Allowance for Loan Losses - Summary of Loans Modified as Troubled Debt Restructurings (Detail) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 USD ($) Contract | Sep. 30, 2015 USD ($) Contract | Sep. 30, 2016 USD ($) Contract | Sep. 30, 2015 USD ($) Contract
Financing Receivable, Modifications [Line Items] |  |  |  |
Troubled debt restructurings, Number of Loans | Contract | 2 | 2 | 5 | 4
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | $ 779 | $ 2,698 | $ 1,109 | $ 3,058
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | 779 | 2,698 | 1,109 | 3,058
Troubled debt restructurings, Outstanding Recorded Investment | 773 | 2,683 | 1,167 | 3,023
Troubled debt restructurings, Financial Effect Resulting From Modifications | $ 0 | $ 0 | $ 28 | $ 12
Commercial and Industrial [Member] | Interest Rate Reduction [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Troubled debt restructurings, Number of Loans | Contract | 0 | 0 | 0 | 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | $ 0 | $ 0 | $ 0 | $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | 0 | 0 | 0 | 0
Troubled debt restructurings, Outstanding Recorded Investment | 0 | 0 | 0 | 0
Troubled debt restructurings, Financial Effect Resulting From Modifications | $ 0 | $ 0 | $ 0 | $ 0
Commercial and Industrial [Member] | Change in Amortization Period or Maturity [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Troubled debt restructurings, Number of Loans | Contract | 0 | 0 | 1 | 1
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | $ 0 | $ 0 | $ 112 | $ 30
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | 0 | 0 | 112 | 30
Troubled debt restructurings, Outstanding Recorded Investment | 0 | 0 | 184 | 15
Troubled debt restructurings, Financial Effect Resulting From Modifications | $ 0 | $ 0 | $ 0 | $ 12
Small Business Administration [Member] | Interest Rate Reduction [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Troubled debt restructurings, Number of Loans | Contract | 0 | 0 | 0 | 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | $ 0 | $ 0 | $ 0 | $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | 0 | 0 | 0 | 0
Troubled debt restructurings, Outstanding Recorded Investment | 0 | 0 | 0 | 0
Troubled debt restructurings, Financial Effect Resulting From Modifications | $ 0 | $ 0 | $ 0 | $ 0
Small Business Administration [Member] | Change in Amortization Period or Maturity [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Troubled debt restructurings, Number of Loans | Contract | 1 | 0 | 2 | 1
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | $ 20 | $ 0 | $ 214 | $ 330
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | 20 | 0 | 214 | 330
Troubled debt restructurings, Outstanding Recorded Investment | 14 | 0 | 202 | 325
Troubled debt restructurings, Financial Effect Resulting From Modifications | $ 0 | $ 0 | $ 28 | $ 0
Commercial Real Estate Owner Occupied [Member] | Interest Rate Reduction [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Troubled debt restructurings, Number of Loans | Contract | 0 | 0 | 0 | 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | $ 0 | $ 0 | $ 0 | $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | 0 | 0 | 0 | 0
Troubled debt restructurings, Outstanding Recorded Investment | 0 | 0 | 0 | 0
Troubled debt restructurings, Financial Effect Resulting From Modifications | $ 0 | $ 0 | $ 0 | $ 0
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 | 0 | 0 | 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | $ 0 | $ 0 | $ 0 | $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | 0 | 0 | 0 | 0
Troubled debt restructurings, Outstanding Recorded Investment | 0 | 0 | 0 | 0
Troubled debt restructurings, Financial Effect Resulting From Modifications | $ 0 | $ 0 | $ 0 | $ 0
Commercial Real Estate Non-owner Occupied [Member] | Interest Rate Reduction [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Troubled debt restructurings, Number of Loans | Contract | 0 | 1 | 0 | 1
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | $ 0 | $ 2,376 | $ 0 | $ 2,376
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | 0 | 2,376 | 0 | 2,376
Troubled debt restructurings, Outstanding Recorded Investment | 0 | 2,353 | 0 | 2,353
Troubled debt restructurings, Financial Effect Resulting From Modifications | $ 0 | $ 0 | $ 0 | $ 0
Commercial Real Estate Non-owner Occupied [Member] | Change in Amortization Period or Maturity [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Troubled debt restructurings, Number of Loans | Contract | 1 | 0 | 1 | 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | $ 759 | $ 0 | $ 759 | $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | 759 | 0 | 759 | 0
Troubled debt restructurings, Outstanding Recorded Investment | 759 | 0 | 759 | 0
Troubled debt restructurings, Financial Effect Resulting From Modifications | $ 0 | $ 0 | $ 0 | $ 0
Consumer [Member] | Interest Rate Reduction [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Troubled debt restructurings, Number of Loans | Contract | 0 | 0 | 0 | 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | $ 0 | $ 0 | $ 0 | $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | 0 | 0 | 0 | 0
Troubled debt restructurings, Outstanding Recorded Investment | 0 | 0 | 0 | 0
Troubled debt restructurings, Financial Effect Resulting From Modifications | $ 0 | $ 0 | $ 0 | $ 0
Consumer [Member] | Change in Amortization Period or Maturity [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Troubled debt restructurings, Number of Loans | Contract | 0 | 0 | 1 | 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | $ 0 | $ 0 | $ 24 | $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | 0 | 0 | 24 | 0
Troubled debt restructurings, Outstanding Recorded Investment | 0 | 0 | 22 | 0
Troubled debt restructurings, Financial Effect Resulting From Modifications | $ 0 | $ 0 | $ 0 | $ 0
SFR Mortgage [Member] | Interest Rate Reduction [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Troubled debt restructurings, Number of Loans | Contract | 0 | 1 | 0 | 1
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | $ 0 | $ 322 | $ 0 | $ 322
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | 0 | 322 | 0 | 322
Troubled debt restructurings, Outstanding Recorded Investment | 0 | 330 | 0 | 330
Troubled debt restructurings, Financial Effect Resulting From Modifications | $ 0 | $ 0 | $ 0 | $ 0
SFR Mortgage [Member] | Change in Amortization Period or Maturity [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Troubled debt restructurings, Number of Loans | Contract | 0 | 0 | 0 | 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | $ 0 | $ 0 | $ 0 | $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | 0 | 0 | 0 | 0
Troubled debt restructurings, Outstanding Recorded Investment | 0 | 0 | 0 | 0
Troubled debt restructurings, Financial Effect Resulting From Modifications | $ 0 | $ 0 | $ 0 | $ 0

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