Inventory and Other Current Assets (Tables)

9 Months Ended

Sep. 30, 2014

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

	September 30, 2014		December 31, 2013
Finished goods	$	66,340	$	65,621
Raw materials		33,281		20,764
Work-in-process		18,445		20,064
Supplies and consumables		45,936		56,470
Total	$	164,002	$	162,919