Inventories (Details) - USD ($) $ in Thousands |
Dec. 31, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Inventory, Net | ||
| Finished products and work in process | $ 199,919 | $ 175,182 |
| Raw materials | 62,469 | 51,866 |
| Inventory, Net | 262,388 | 227,048 |
| Valued at lower of cost or market: | ||
| LIFO basis | 162,315 | 135,605 |
| Valued at Lower of Cost and Net Realizable Value [Abstract] | ||
| FIFO or average cost basis | 100,073 | 91,443 |
| Inventory, Net | $ 262,388 | $ 227,048 |
| X | ||||||||||
- Definition FIFO or Weighted Average Inventory Amount No definition available.
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- Definition Valued at Lower of Cost and Net Realizable Value [Abstract] No definition available.
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- Definition The aggregated amount of merchandise or goods held by the entity and readily available for future sale plus items held by the entity which are partially complete or in the process of being readied for future sale. This amount is net of valuation reserves and adjustments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- 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://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of unprocessed items to be consumed in the manufacturing or production process. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of LIFO (last in first out) inventory present at the reporting date when inventory is also valued using different valuation methods. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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