Inventories (Tables)

6 Months Ended

Jun. 30, 2017

Inventory Disclosure [Abstract]

Breakdown of Inventories

The following table provides a breakdown of inventories at June 30, 2017 and December 31, 2016 (in thousands):

	June 30,		December 31,
	2017		2016
Finished goods(a)	$	385,798	$	289,102
Raw materials and work in process(b)	126,364		109,706
Stores, supplies and other	53,732		51,455
Total inventories	$	565,894	$	450,263

(a) Increase primarily due to the Jiangli New Materials acquisition and the build up of inventory at several Lithium and Advanced Materials segment locations.

(b) Included $53.7 million and $47.1 million at June 30, 2017 and December 31, 2016, respectively, of work in process related to the Lithium product category.