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Inventories
12 Months Ended
Dec. 31, 2011
Inventory Disclosure [Abstract]  
Inventory [Text Block]
Inventories
Inventories by major category are as follows (in thousands):

 
2011
 
2010
Raw materials                                                                           
$
49,236

 
$
56,946

Work in process                                                                           
20,968

 
26,085

Finished goods                                                                           
63,592

 
52,041

 
$
133,796

 
$
135,072