Inventories (Tables)

9 Months Ended

Sep. 30, 2014

Inventory, Net [Abstract]

Schedule of Inventories

Inventories consist of the following:	September 30, 2014		December 31, 2013
Raw materials	$	67,145	$	69,776
Work-in-process	21,597		22,183
Finished goods	16,722		17,661
Operating and other supplies	136,286		129,995
Inventories	$	241,750	$	239,615