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Inventories
12 Months Ended
Dec. 31, 2011
Inventory Disclosure [Abstract]  
Inventories
Inventories
 
Inventories consist of the following at December 31,:
 
 
2010
 
2011
 
 
 
 
Raw materials
$
49,038

 
$
52,351

Work in process
15,460

 
15,499

Finished goods
108,298

 
100,588

 
$
172,796

 
$
168,438