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Restructuring (Tables)
3 Months Ended
Mar. 31, 2012
Restructuring and Related Activities [Abstract]  
Schedule of restructuring costs
We incurred the following restructuring costs: 

Three months ended March 31,
 
2011
 
2012



 


  Facility consolidation costs
$
754

 
$
1,474




 


Restructuring costs

 

  included in cost of sales
$
754

 
$
1,474




 





 


Administrative

 

  consolidation costs
$
694

 
$
273




 


Restructuring costs

 

  included in other expense
$
694

 
$
273