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ACQUISITIONS - Summary of Pro Forma Consolidated Net Sales and Income (Loss) Before Income Taxes and Equity in Earnings (Details) - Filament
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
$ / shares
Business Acquisition [Line Items]  
Net sales $ 730,353
Income before income taxes and equity in earnings 2,439
Net loss $ (267)
Basic loss per common share (usd per share) | $ / shares $ (0.01)
Diluted loss per common share (usd per share) | $ / shares $ (0.01)