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Inventories (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
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Inventories [Abstract] |  |
Finished goods | $ 47,278 | $ 51,626
Work-in-process | 6,887 | 6,221
Raw materials and supplies | 7,926 | 7,086
Inventories | $ 62,091 | $ 64,933

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- Definition Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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