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Inventories | 12 Months Ended
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Dec. 31, 2016
Inventory Disclosure [Abstract] |
Inventories | Inventories: The following table provides a breakdown of inventories at December 31, 2016 and 2015 (in thousands):
| December 31,
| 2016 |  | 2015
Finished goods | $ | 289,102 |  |  | $ | 264,025 |
Raw materials and work in process(a) | 109,706 |  |  | 122,038 |
Stores, supplies and other | 51,455 |  |  | 53,450 |
Total inventories(b) | $ | 450,263 |  |  | $ | 439,513 |
(a) | Included $47.1 million and $39.1 million at December 31, 2016 and 2015, respectively, of work in process related to the Lithium product category.
(b) | As of December 31, 2015, $162.8 million of Inventories were classified as Assets held for sale in the consolidated balance sheets. See Note 3, “Divestitures,” for additional information.
Approximately 19% of our inventories are valued using the last-in, first-out (“LIFO”) method at December 31, 2016 and 2015. The portion of our domestic inventories stated on the LIFO basis amounted to $87.5 million and $85.1 million at December 31, 2016 and 2015, respectively, which are below replacement cost by approximately $33.8 million and $36.9 million, 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 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766 + Details
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