(3)Inventory

Inventories are stated at the lower of cost or market. Cost is determined using the first-in, first-out or weighted-average cost methods for finished goods and work-in-process. Supplies and consumables consist principally of products used in our services provided to customers. The components of the inventory balances are as follows (in thousands):



	September 30, 2016		December 31, 2015
Finished goods	$	67,749	$	71,951
Raw materials		16,745		23,418
Work-in-process		4,194		18,203
Supplies and consumables		35,224		35,189
Total	$	123,912	$	148,761