Inventory and Other Current Assets

3 Months Ended

Mar. 31, 2015

Inventory and Other Current Assets [Abstract]

Inventory and Other Current Assets

(5)Inventory and Other Current Assets

Inventory and other current assets includes approximately $177.5 million and $165.6 million of inventory as of March 31, 2015 and December 31, 2014, respectively.  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):

	March 31, 2015		December 31, 2014
Finished goods	$	83,866	$	72,788
Raw materials		28,847		29,718
Work-in-process		22,684		20,317
Supplies and consumables		42,122		42,739
Total	$	177,519	$	165,562