Inventories (Tables)

3 Months Ended

Mar. 31, 2014

Inventories

Schedule of inventories

Inventory consisted of the following (in thousands):

	March 31,		December 31,
	2014		2013
Raw materials	$	615,776	$	660,384
Supplies	292,119		293,533
Work in progress	112,504		84,710
Finished goods	311,702		276,120
Total inventories	$	1,332,101	$	1,314,747