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Inventories | 3 Months Ended
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Mar. 31, 2018
Inventory Disclosure [Abstract] |
Inventories | INVENTORIES Inventories at March 31, 2018 and December 31, 2017 are summarized in the following table:
|  | March 31, 2018 |  | December 31, 2017
Finished goods |  | $ | 54,983 |  |  | $ | 55,846 |
Contract assets |  | 24,862 |  |  | 25,320 |
Work-in-process |  | 7,721 |  |  | 4,059 |
Raw materials |  | 18,837 |  |  | 17,505 |
Total inventories at current costs |  | 106,403 |  |  | 102,730 |
Less: LIFO reserve |  | (5,351 | ) |  | (5,187 | )
|  | $ | 101,052 |  |  | $ | 97,543 |
Inventory is generally valued at the lower of last-in, first-out (“LIFO”) cost or market. Other inventories of the Company are valued at average cost or net realizable value, whichever is lower. An actual valuation of inventory under the LIFO method is made at the end of each year based on the inventory levels and costs at that time. Interim LIFO calculations are based on management’s estimates of expected year-end levels and costs. Prior to the adoption of ASU 2014-09, contract assets were classified within work-in-process inventory.

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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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