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Inventories | 6 Months Ended
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Jun. 30, 2019
Inventory Disclosure [Abstract] |
Inventories | Inventories: The following table provides a breakdown of inventories at June 30, 2019 and December 31, 2018 (in thousands):
| June 30, |  | December 31,
| 2019 |  | 2018
Finished goods(a) | $ | 574,880 |  |  | $ | 482,355 |
Raw materials and work in process(b) | 172,607 |  |  | 158,290 |
Stores, supplies and other | 66,535 |  |  | 59,895 |
Total | $ | 814,022 |  |  | $ | 700,540 |
(a) | Increase primarily due to the build-up of inventory in our Lithium and Catalysts segments to meet higher projected sales during the remainder of 2019.
(b) Included $69.6 million and $71.4 million at June 30, 2019 and December 31, 2018, respectively, of work in process in our Lithium segment. Raw materials increased primarily in Lithium to meet higher projected sales during the remainder of 2019.

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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