Inventories (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2013

Dec. 31, 2012

Summary of Inventories

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

	December 31, 2012		March 31, 2013
Finished goods	$	37,415	$	40,898
Work in process		32,383		35,638
Raw materials and supplies		73,455		86,384
Inventories	$	143,253	$	162,920

As of December 31, 2011 and 2012, inventories are reflected net of reserves of $17,287 and $20,987, respectively.

	December 31, 2011		December 31, 2012
Finished goods	$	34,446	$	37,415
Work in process		34,466		32,383
Raw materials and supplies		70,814		73,455
Inventories, net	$	139,726	$	143,253