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LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Loans and Leases by Class Modified as Troubled Debt Restructurings (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($) Loan | Dec. 31, 2017 USD ($) Loan | Dec. 31, 2016 USD ($) Loan
Commercial | Commercial and industrial |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Loans | Loan | 2 | 1 | 0
Pre- Modification Outstanding Recorded Investment | $ 171 | $ 2,706 | $ 0
Post-Modification Outstanding Recorded Investment | $ 163 | $ 2,706 | $ 0
Commercial | SBA |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Loans | Loan | 1 | 0 | 0
Pre- Modification Outstanding Recorded Investment | $ 187 | $ 0 | $ 0
Post-Modification Outstanding Recorded Investment | $ 187 | $ 0 | $ 0
Consumer |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Loans | Loan | 3 | 4 | 42
Pre- Modification Outstanding Recorded Investment | $ 358 | $ 5,122 | $ 10,278
Post-Modification Outstanding Recorded Investment | $ 350 | $ 5,139 | $ 10,273
Consumer | Single family residential mortgage |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Loans | Loan | 0 | 3 | 42
Pre- Modification Outstanding Recorded Investment | $ 0 | $ 2,416 | $ 10,278
Post-Modification Outstanding Recorded Investment | $ 0 | $ 2,433 | $ 10,273

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