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Income Taxes (Details Textual) (USD $) | 12 Months Ended
--- | ---
Nov. 30, 2013 | Nov. 30, 2012 | Nov. 30, 2011
Income Tax Contingency [Line Items] |  |  |
Accumulated Deferred Investment Tax Credit | $ 7,800,000 |  |
Income Taxes (Textual) [Abstract] |  |  |
Income tax benefit | 1,600,000 | 20,100,000 | 2,400,000
Income Taxes Receivable, Current | 1,400,000 |  |
Provision for deferred income taxes | 0 | 1,152,000 | 0
Deferred Tax Assets, Net | 0 | 0 |
Reversal of liability for Unrecognized tax benefits | 1,000,000 |  | 2,600,000
State and Local Income Tax Expense (Benefit), Continuing Operations | 800,000 |  |
Net Increase in valuation allowance recorded against net deferred tax assets | 20,700,000 | (32,300,000) | (76,700,000)
Period for Carry forward of tax benefits related to deferred tax assets | 20 years |  |
Deferred tax assets, operating loss carryforwards, federal | 329,000,000 |  |
Deferred tax assets, operating loss carryforwards, state and local | 130,900,000 |  |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local, Expired | 3,500,000 |  |
Deferred Tax Assets, Tax Credit Carryforwards | 84,400,000 |  |
Valuation allowance | (859,440,000) | (880,113,000) |
Unrecognized tax benefits that if recognized would affect the Company's annual effective tax rate | 300,000 | 1,300,000 | 1,800,000
Total accrued interest and penalties related to unrecognized income tax benefits | 300,000 | 600,000 |
Uncertain tax positions | 200,000 | 1,000,000 |
Income taxes refunded | 61,000 | 22,342,000 | 213,000
Valuation allowance against net deferred tax assets | 859,440,000 | 880,113,000 |
Total deferred tax assets | 150,991,000 | 140,907,000 |
Unrecognized Tax Benefits | 500,000 |  |
Maximum |  |  |
Income Tax Contingency [Line Items] |  |  |
Anticipated Decrease in unrecognized tax benefit during 12 months following current reporting date | 300,000 |  |
Income Taxes (Textual) [Abstract] |  |  |
Minimum expiration period for state NOLs | 2033 |  |
Tax Credit Expiration Date Minimum | 2033 |  |
Minimum |  |  |
Income Tax Contingency [Line Items] |  |  |
Anticipated Decrease in unrecognized tax benefit during 12 months following current reporting date | 100,000 |  |
Income Taxes (Textual) [Abstract] |  |  |
Minimum expiration period for state NOLs | 2014 |  |
Tax Credit Expiration Date Minimum | 2015 |  |
Investment Tax Credit Carryforward, Expiration in 2026 [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Accumulated Deferred Investment Tax Credit | 7,000,000 |  |
Investment Tax Credit Carryforward, Expiration in 2027 [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Accumulated Deferred Investment Tax Credit | $ 800,000 |  |

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