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Schedule II: Valuation and Qualifying Accounts (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Nov. 30, 2012
Nov. 30, 2011
Nov. 30, 2010
Movement in Valuation Allowances and Reserves [Roll Forward]      
Additions Charged to Revenue and COGS and Expense $ (1,685) $ 8,736 $ 7,536
Reclassifications, Write-offs and Deductions 2,889 11,819 11,249
Allowance for sales returns [Member]
     
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balances at Beginning of Fiscal Year 35,475 32,525 20,482
Additions Charged to Revenue and COGS and Expense 6,394 10,410 11,861
Additions from Acquisitions 0 0 0
Reclassifications, Write-offs and Deductions 611 (7,460) 182
Balances at Fiscal Year End 42,480 35,475 32,525
Allowance of deferred tax assets [Member]
     
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balances at Beginning of Fiscal Year 7,989 3,862 5,825
Additions Charged to Revenue and COGS and Expense (1,044) 485 668
Additions from Acquisitions 0 3,642 0
Reclassifications, Write-offs and Deductions (523) 0 (2,631)
Balances at Fiscal Year End $ 6,422 $ 7,989 $ 3,862