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Inventory | 12 Months Ended
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Dec. 31, 2017
Inventory, Net [Abstract] |
Inventory | Inventory Inventories at December 31, 2017 and 2016 are summarized in the following table:
|  | 2017 |  | 2016
Finished goods |  | $ | 55,846 |  |  | $ | 46,673 |
Work-in-process |  | 29,379 |  |  | 21,716 |
Raw materials |  | 17,505 |  |  | 18,032 |
Total inventories at current costs |  | 102,730 |  |  | 86,421 |
Less: LIFO reserve |  | (5,187 | ) |  | (3,178 | )
|  | $ | 97,543 |  |  | $ | 83,243 |
At December 31, 2017 and 2016, approximately 50% and 53% of the Company’s inventory was valued at the lower of LIFO cost or market. At December 31, 2017 and 2016, the LIFO carrying value of inventories for book purposes exceeded the LIFO value for tax purposes by approximately $10,694 and $8,925, respectively. At December 31, 2017, liquidation of certain LIFO inventory layers carried at costs that were lower than the costs of current purchases resulted in a decrease in cost of goods sold of $16 and at December 31, 2016 and 2015 liquidation of certain LIFO inventory layers carried at costs that were higher than the costs of their current purchases resulted in an increase in cost of goods sold of $1,304 and $115, respectively.

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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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- References No definition available. + Details
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