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ACQUISITIONS - Narrative (Details) - USD ($) | Jun. 01, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
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Business Acquisition [Line Items] |  |  |  |
Goodwill |  | $ 32,160,000 | $ 32,160,000 | $ 18,742,000
Westbound Bank |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Percentage of shares acquired | 100.00% |  |  |
Total consideration transferred | $ 35,991,000 |  |  |
Shares issued (shares) | 899,816 |  |  |
Shares of acquired company exchanged (shares) | 2,311,952 |  |  |
Acquisition related costs | $ 1,175,000 |  |  |
Goodwill | 13,418,000 |  |  |
Goodwill expected to be deducted | 0 |  |  |
Contingent consideration withheld in escrow | $ 1,750,000 |  |  |
Performance period pertinent to contingent consideration | 3 years |  |  |
Fair value of performing loans | $ 154,687,000 |  |  |

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