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GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Additional Information (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) Branch | Dec. 31, 2014 USD ($)
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Goodwill | $ 37,144 | $ 37,144 |  |
Goodwill (including portion attributable to discontinued operations) |  | 39,244 | $ 39,244 | $ 31,591
Goodwill adjustments for purchase accounting | 0 | 0 | 7,653 |
Impairment on intangible assets | 336 | 690 | $ 258 |
Number of branch locations sold | Branch |  |  | 2 |
Aggregate amortization expense | 3,928 | 4,851 | $ 5,836 |
Banking |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Goodwill |  | 37,100 |  |
Mortgage Banking |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Goodwill |  | 2,100 |  |
Goodwill, impairment loss | $ 2,100 |  |  |
Core deposit intangibles |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Weighted average amortization period | 5 years 11 months 24 days |  |  |
Impairment on intangible assets |  |  | $ 258 |
Core deposit intangibles | Minimum |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization period of other intangible assets | 4 years |  |  |
Core deposit intangibles | Maximum |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Amortization period of other intangible assets | 10 years |  |  |
Customer relationship intangible |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Impairment on intangible assets | $ 246 |  |  |
Trade name intangibles |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Impairment on intangible assets | $ 90 |  |  |
Trade name intangibles | Mortgage Banking |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Impairment on intangible assets |  | $ 690 |  |

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