Inventories (Tables)

6 Months Ended

Jun. 30, 2015

Inventories

Schedule of inventories

Inventory consisted of the following (in thousands):

	June 30,		December 31,
	2015		2014
Raw materials	$	518,096	$	764,883
Supplies	385,728		374,599
Work in progress	110,750		128,882
Finished goods	277,495		350,055
Total inventories	$	1,292,069	$	1,618,419