Inventories (Details) - USD ($) $ in Thousands  | 
Sep. 30, 2020  | 
Dec. 31, 2019  | 
|---|---|---|
| Inventories [Abstract] | ||
| Finished goods | $ 51,685 | $ 59,452 | 
| Work-in-process | 4,984 | 7,474 | 
| Raw materials and supplies | 8,228 | 6,506 | 
| Inventories | $ 64,897 | $ 73,432 | 
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- References No definition available. 
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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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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