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Inventories | 9 Months Ended
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Sep. 30, 2017
Inventory Disclosure [Abstract] |
Inventories | Inventories The Corporation values its inventory at the lower of cost or net realizable value with approximately 83 percent valued by the last-in, first-out ("LIFO") costing method.
(In thousands) | September 30, 2017 |  | December 31, 2016
Finished products | $ | 96,275 |  |  | $ | 71,223 |
Materials and work in process | 81,970 |  |  | 71,375 |
LIFO allowance | (24,160 | ) |  | (24,160 | )
| $ | 154,085 |  |  | $ | 118,438 |

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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