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INCOME TAXES - Additional Information (Details) - USD ($) | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Income Taxes [Line Items] |  |
Effective income tax rate expense (benefit), percent | (3.80%) | 18.50%
Income tax expense (benefit) | $ (216,000) | $ 2,345,000
ASU No. 2016-09 [Member] |  |
Income Taxes [Line Items] |  |
Income tax expense (benefit) | $ (1,300,000) | $ (1,200,000)

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