Inventories (Tables)

6 Months Ended

Jun. 30, 2013

Inventory Disclosure [Abstract]

Summary of Inventories

The Company’s inventories are as follows:

	As of
	June 30, 2013		December 31, 2012
Raw materials and supplies	$	37,111	$	37,766
Work-in-process		83,811		69,286
Finished goods		78,627		67,326
Total inventories	$	199,549	$	174,378