Inventories (Tables)

9 Months Ended

Sep. 30, 2013

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories were comprised of the following at December 31, 2012 and September 30, 2013:

	December 31,		September 30,
	2012		2013
Finished goods	$	37,415	$	43,361
Work in process		32,383		41,027
Raw materials and supplies		73,455		102,370
	$	143,253	$	186,758