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Income Taxes (Details Textual) - USD ($)
 3 Months Ended 12 Months Ended
Nov. 30, 2014
Nov. 30, 2016
Nov. 30, 2015
Nov. 30, 2014
Nov. 30, 2013
Income Tax Contingency [Line Items]          
Income Tax Credits and Adjustments   $ 15,200,000 $ 5,600,000    
Effective Income Tax Rate Reconciliation, Percent   (29.30%) (33.40%) 867.20%  
Future Income From Continuing Operations Before Income Taxes   $ 1,800,000,000      
Income Taxes (Textual) [Abstract]          
Income tax benefit (expense) $ 824,200,000 (43,700,000) $ (42,400,000) $ 823,400,000  
Deferred income taxes   43,211,000 43,036,000 (825,232,000)  
Deferred Tax Assets, Net   (763,800,000) (820,000,000)    
Net Increase in valuation allowance recorded against net deferred tax assets   $ 13,000,000 3,400,000    
Period for Carry forward of tax benefits related to deferred tax assets   20 years      
Deferred Tax Assets, Operating Loss Carryforwards, State and Local, Expired   $ 500,000 1,700,000    
Deferred Tax Assets, Tax Credit Carryforwards   104,900,000      
Accumulated Deferred Investment Tax Credit   3,200,000      
Valuation allowance (41,200,000) (24,800,000) (37,782,000) (41,200,000)  
Unrecognized tax benefits that if recognized would affect the Company's annual effective tax rate 100,000 100,000 100,000 100,000  
Total accrued interest and penalties related to unrecognized income tax benefits   0 0    
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit   0 0    
Unrecognized Tax Benefits 206,000 56,000 56,000 206,000 $ 206,000
Income taxes refunded   550,000 11,000 1,728,000  
Valuation allowance against net deferred tax assets $ 41,200,000 24,800,000 37,782,000 $ 41,200,000  
Total deferred tax assets   921,588,000 $ 961,666,000    
Gross Unrecognized Tax Benefits Including Interest and Penalties   $ 100,000      
Maximum          
Income Taxes (Textual) [Abstract]          
Tax Credit Carryforward, Expiration Date   Dec. 31, 2036      
Anticipated Decrease in Unrecognized Tax Benefit During Twelve Months Following Current Reporting Date   $ 100,000      
Minimum          
Income Taxes (Textual) [Abstract]          
Tax Credit Carryforward, Expiration Date   Dec. 31, 2026      
Anticipated Decrease in Unrecognized Tax Benefit During Twelve Months Following Current Reporting Date   $ 0      
Investment Tax Credit Carryforward, Expiration in 2026 [Member]          
Income Taxes (Textual) [Abstract]          
Accumulated Deferred Investment Tax Credit   2,400,000      
Investment Tax Credit Carryforward, Expiration in 2027 [Member]          
Income Taxes (Textual) [Abstract]          
Accumulated Deferred Investment Tax Credit   800,000      
State and Local Jurisdiction [Member]          
Income Taxes (Textual) [Abstract]          
Operating Loss Carryforwards   $ 146,100,000      
State and Local Jurisdiction [Member] | Maximum          
Income Taxes (Textual) [Abstract]          
Operating Loss Carryforwards, Expiration Date   Dec. 31, 2036      
State and Local Jurisdiction [Member] | Minimum          
Income Taxes (Textual) [Abstract]          
Operating Loss Carryforwards, Expiration Date   Dec. 31, 2017      
Internal Revenue Service (IRS) [Member]          
Income Taxes (Textual) [Abstract]          
Operating Loss Carryforwards   $ 204,200,000      
Internal Revenue Service (IRS) [Member] | Maximum          
Income Taxes (Textual) [Abstract]          
Operating Loss Carryforwards, Expiration Date   Dec. 31, 2033      
Internal Revenue Service (IRS) [Member] | Minimum          
Income Taxes (Textual) [Abstract]          
Operating Loss Carryforwards, Expiration Date   Dec. 31, 2030