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.