Inventories (Tables)

12 Months Ended

Dec. 31, 2012

Inventory Disclosure [Abstract]

Schedule of inventory

Inventories consist of the following at December 31,:

	2011		2012
Raw materials	$	52,351	$	45,115
Work in process	15,499		14,229
Finished goods	100,588		96,884
	$	168,438	$	156,228