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BASIS OF PRESENTATION - Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2018 | Jan. 01, 2018 | Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Contract liability recognition | $ 241 |  |
Reclassification of the income tax effects of the Tax Cuts and Jobs Act from accumulated other comprehensive income for adoption of ASU 2018-02 | 0 |  |
Accounting Standards Update 2014-09 |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Modified retrospective basis adoption of Revenue Recognition Accounting Codification Standard 606 |  |  | $ (184)
Retained earnings |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Reclassification of the income tax effects of the Tax Cuts and Jobs Act from accumulated other comprehensive income for adoption of ASU 2018-02 | $ 980 |  |
Retained earnings | Accounting Standards Update 2014-09 |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Modified retrospective basis adoption of Revenue Recognition Accounting Codification Standard 606 |  | $ (184) | $ (184)

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