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Restructuring Charges (Details) (USD $)
In Thousands
3 Months Ended 9 Months Ended
Jul. 31, 2011
Jul. 31, 2010
Jul. 31, 2011
Jul. 31, 2010
Reconciliation of the beginning and ending restructuring reserve balances        
Balance at October 31, 2010     $ 20,238  
Costs incurred and charged to expense 3,396 9,779 11,407 20,566
Restructuring reserve settled with cash or otherwise settled     (17,571)  
Balance at July 31, 2011 14,074   14,074  
Employee separation costs [Member]
       
Reconciliation of the beginning and ending restructuring reserve balances        
Balance at October 31, 2010     12,668  
Costs incurred and charged to expense     6,197  
Restructuring reserve settled with cash or otherwise settled     (11,453)  
Balance at July 31, 2011 7,412   7,412  
Other restructuring costs [Member]
       
Reconciliation of the beginning and ending restructuring reserve balances        
Balance at October 31, 2010     7,570  
Costs incurred and charged to expense     4,841  
Restructuring reserve settled with cash or otherwise settled     (6,008)  
Balance at July 31, 2011 6,403   6,403  
Asset impairments [Member]
       
Reconciliation of the beginning and ending restructuring reserve balances        
Balance at October 31, 2010     0  
Costs incurred and charged to expense     369  
Restructuring reserve settled with cash or otherwise settled     (110)  
Balance at July 31, 2011 $ 259   $ 259