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LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Summary of TDR Modification Type (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 USD ($) Loan | Jun. 30, 2017 USD ($) Loan | Jun. 30, 2018 USD ($) Loan | Jun. 30, 2017 USD ($) Loan
Financing Receivable, Modifications [Line Items] |  |  |  |
Post-Modification Outstanding Recorded Investment | $ 0 |  |  |
Commercial |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Loans | Loan | 0 |  | 2 |
Post-Modification Outstanding Recorded Investment | $ 0 |  | $ 163 |
Commercial | Change in Principal Payments and Interest Rates |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Loans | Loan |  |  | 0 |
Post-Modification Outstanding Recorded Investment |  |  | $ 0 |
Commercial | Change in Principal Payments |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Loans | Loan |  |  | 2 |
Post-Modification Outstanding Recorded Investment |  |  | $ 163 |
Commercial | Commercial and industrial |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Loans | Loan | 0 |  | 2 |
Post-Modification Outstanding Recorded Investment | $ 0 |  | $ 163 |
Commercial | Commercial and industrial | Change in Principal Payments and Interest Rates |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Loans | Loan |  |  | 0 |
Post-Modification Outstanding Recorded Investment |  |  | $ 0 |
Commercial | Commercial and industrial | Change in Principal Payments |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Loans | Loan |  |  | 2 |
Post-Modification Outstanding Recorded Investment |  |  | $ 163 |
Consumer |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Loans | Loan |  | 1 |  | 3
Post-Modification Outstanding Recorded Investment |  | $ 1,160 |  | $ 2,433
Consumer | Change in Principal Payments and Interest Rates |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Loans | Loan |  | 1 |  | 2
Post-Modification Outstanding Recorded Investment |  | $ 1,160 |  | $ 1,290
Consumer | Change in Principal Payments |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Loans | Loan |  | 0 |  | 1
Post-Modification Outstanding Recorded Investment |  | $ 0 |  | $ 1,143
Consumer | Single family residential mortgage |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Loans | Loan |  | 1 |  | 3
Post-Modification Outstanding Recorded Investment |  | $ 1,160 |  | $ 2,433
Consumer | Single family residential mortgage | Change in Principal Payments and Interest Rates |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Loans | Loan |  | 1 |  | 2
Post-Modification Outstanding Recorded Investment |  | $ 1,160 |  | $ 1,290
Consumer | Single family residential mortgage | Change in Principal Payments |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of Loans | Loan |  | 0 |  | 1
Post-Modification Outstanding Recorded Investment |  | $ 0 |  | $ 1,143

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