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ACQUISITION - Purchase Price Allocation (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Jun. 01, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | --- | ---
Liabilities [Abstract] |  |  |  |
Goodwill | $ 32,160 |  | $ 18,742 | $ 18,742
Westbound Bank |  |  |  |
Assets [Abstract] |  |  |  |
Cash and due from banks |  | $ 24,927 |  |
Investment securities available for sale |  | 15,264 |  |
Loans, net of discount |  | 154,687 |  |
Accrued interest receivable |  | 651 |  |
Premises and equipment |  | 8,625 |  |
Nonmarketable equity securities |  | 0 |  |
Core deposit intangible |  | 2,700 |  |
Other assets |  | 9,205 |  |
Total assets acquired |  | 216,059 |  |
Liabilities [Abstract] |  |  |  |
Accrued interest and other liabilities |  | 1,565 |  |
Total liabilities assumed |  | 193,486 |  |
Net assets acquired |  | 22,573 |  |
Total consideration paid |  | 35,991 |  |
Goodwill |  | 13,418 |  |
Noninterest-bearing deposits | Westbound Bank |  |  |  |
Liabilities [Abstract] |  |  |  |
Financial liabilities |  | 40,595 |  |
Interest-bearing deposits | Westbound Bank |  |  |  |
Liabilities [Abstract] |  |  |  |
Financial liabilities |  | 140,826 |  |
Subordinated debentures | Westbound Bank |  |  |  |
Liabilities [Abstract] |  |  |  |
Financial liabilities |  | $ 10,500 |  |

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