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ACQUISITION - Summary of Pro Forma Consolidated Net Sales and Income (Loss) Before Income Taxes and Equity in Earnings (Details) - Filament - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2018
Business Acquisition [Line Items]    
Net sales $ 209,448 $ 502,079
Income (loss) before income taxes and equity in earnings (losses) 6,956 (15,416)
Net income (loss) $ 6,145 $ (10,671)
Basic and diluted income (loss) per common share (usd per share) $ 0.30 $ (0.52)