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Restructuring (Tables)
6 Months Ended
Jun. 30, 2011
Restructuring 
Schedule of Restructuring Related Liabilities
         
Balance at December 31, 2010
 
$
6,295
 
Provision charged to operating expense
   
354
 
Cash outlays
   
(2,255
)
Non-cash write-downs
   
(2,528
)
Balance at September 30, 2011
 
$
1,866