Inventories (Tables)

3 Months Ended

Mar. 31, 2012

Inventories

Schedule of carrying values of inventories

	At March 31,				At December 31,
	2012		2011		2011
Raw materials	$	72,616	$	70,780	$	77,364
In-process products	22,226		19,218		21,357
Finished products	89,226		76,968		81,408
	$	184,068	$	166,966	$	180,129