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Inventories
6 Months Ended
Jun. 30, 2012
Inventory Disclosure [Abstract]  
Inventories [Text Block]
Inventories
 
Inventories by major category are as follows (in thousands):
 
 
 
June 30, 2012
 
December 31, 2011
Raw materials
 
$
49,519

 
$
49,236

Work in process
 
20,095

 
20,968

Finished goods
 
61,488

 
63,592

 
 
$
131,102

 
$
133,796