Income Taxes (Details) (USD $)	3 Months Ended
	Feb. 28, 2015	Nov. 30, 2014	Feb. 28, 2014
Income Tax Disclosure [Abstract]
Income tax expense	$ (2,700,000)		$ (200,000)
Income Tax Credits and Adjustments	1,400,000
Unrecognized Tax Benefits	100,000	100,000
Gross Unrecognized Tax Benefits Including Interest and Penalties	300,000	300,000
Net (increase) reduction in valuation allowance		825,200,000
Valuation allowance	41,200,000	41,200,000
Income Tax Contingency [Line Items]
Deferred Tax Assets, Gross	863,800,000	866,400,000
Effective Income Tax Rate Reconciliation, Percent	25.70%
Minimum [Member]
Income Tax Contingency [Line Items]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	0
Maximum [Member]
Income Tax Contingency [Line Items]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$ 100,000