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LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Loans and Leases by Class Modified as Troubled Debt Restructurings (Detail) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 USD ($) | Sep. 30, 2018 USD ($) Loan | Sep. 30, 2017 USD ($) Loan
Financing Receivable, Modifications [Line Items] |  |  |
Post-Modification Outstanding Recorded Investment | $ 0 |  |
Commercial |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Loans | Loan |  | 2 |
Pre- Modification Outstanding Recorded Investment |  | $ 171,000 |
Post-Modification Outstanding Recorded Investment |  | $ 163,000 |
Commercial | Commercial and industrial |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Loans | Loan |  | 2 |
Pre- Modification Outstanding Recorded Investment |  | $ 171,000 |
Post-Modification Outstanding Recorded Investment |  | $ 163,000 |
Consumer |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Loans | Loan |  |  | 3
Pre- Modification Outstanding Recorded Investment |  |  | $ 2,416,000
Post-Modification Outstanding Recorded Investment |  |  | $ 2,433,000
Consumer | Single family residential mortgage |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Loans | Loan |  |  | 3
Pre- Modification Outstanding Recorded Investment |  |  | $ 2,416,000
Post-Modification Outstanding Recorded Investment |  |  | $ 2,433,000

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