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BALANCE SHEET COMPONENTS: (Allowance for Doubtful Receivables) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Nov. 30, 2012
Nov. 30, 2011
Nov. 30, 2010
Allowance for doubtful trade receivables [Roll Forward]      
Allowance for doubtful trade receivables, beginning balance $ 22,803 $ 25,886 $ 29,599
Additions/(Reductions) (1,685) 8,736 7,536
Write-offs and deductions 2,889 11,819 11,249
Allowance for doubtful trade receivables, ending balance $ 18,229 $ 22,803 $ 25,886