XML 71 R66.htm IDEA: XBRL DOCUMENT v2.4.0.6
Income Taxes (Details) (USD $)
 3 Months Ended 9 Months Ended 3 Months Ended
Aug. 31, 2012
Aug. 31, 2011
Aug. 31, 2012
Aug. 31, 2011
Nov. 30, 2011
May 31, 2012
State and Local Jurisdiction
Income Tax Contingency [Line Items]            
Income tax benefit (expense) $ 10,700,000 $ 0 $ 14,800,000 $ (100,000)    
Income tax benefit from resolution of federal tax audit 10,800,000          
Deferred tax asset from resolution of federal tax audit 1,100,000          
Receivable from resolution of federal tax audit 10,100,000   10,100,000      
Income tax refund amount 1,800,000   6,217,000 182,000   4,100,000
Valuation allowance recorded against the net deferred tax assets generated from loss for period 7,100,000 2,500,000 35,100,000 73,300,000    
Net deferred tax assets 0   0   1,100,000  
Valuation allowance 882,900,000   882,900,000   847,800,000  
Net Increase (reduction) in valuation allowance     35,100,000      
Additions (reductions) in total gross unrecognized tax benefits 0   400,000      
Total amount of unrecognized tax benefits, including interest and penalties 1,400,000   1,400,000      
Anticipated decrease in unrecognized tax benefit during 12 months following current reporting date $ 200,000   $ 200,000