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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Stock-Based Compensation Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Closing stock price of common stock | $ 26.22 |
Stock options granted | 0 |
Employee Stock Option [Member] |  |
Option term | 10 years |
Vesting term | 5 years |
Restricted stock [Member] |  |
Vesting term | 3 years |
Shares available for grant | 194,742 |
Unrecognized compensation cost | $ 62 |
Weighted average period, unrecognized compensation expected to be recognized (in years) | 5 months 15 days |
Total compensation cost | $ 1,400 | $ 1,100
Restricted stock [Member] | Tranche One [Member] |  |
Vesting term | 3 years |
Restricted stock [Member] | Tranche Two [Member] |  |
Vesting term | 5 years |
Performance Shares [Member] |  |
Shares available for grant | 47,770 |
Restricted Stock Units [Member] |  |
Unrecognized compensation cost | $ 13,200 |
Weighted average period, unrecognized compensation expected to be recognized (in years) | 1 year 4 months 2 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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