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STOCK-BASED COMPENSATION (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Shares available for grant |  | 1,641,485 |  |
Closing stock price of common stock |  | $ 25.18 |  |
Employee Stock Option [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Option term |  | 10 years |  |
Vesting term |  | 5 years |  |
Unrecognized compensation cost |  | $ 0 |  |
Total compensation cost |  | $ 0 | $ 6 | $ 56
Performance Shares [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Shares forfetied | 92,767 | 92,767 |  |
Restricted stock [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Unrecognized compensation cost |  | $ 101 |  |
Shares forfetied |  | 19,203 |  |
Weighted average period over which unrecognized compensation is expected to be recognized (in years) |  | 5 months 19 days |  |
Total compensation cost |  | $ 4,600 | $ 3,500 | $ 2,800
Restricted stock [Member] | Tranche One [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Vesting term |  | 3 years |  |
Restricted stock [Member] | Tranche Two [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Vesting term |  | 5 years |  |
Restricted Stock Units [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Unrecognized compensation cost |  | $ 8,300 |  |
Weighted average period over which unrecognized compensation is expected to be recognized (in years) |  | 1 year 3 months 25 days |  |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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