Income Taxes (Details) - USD ($)	3 Months Ended			6 Months Ended
	May. 31, 2015	Nov. 30, 2014	May. 31, 2014	May. 31, 2015	May. 31, 2014
Income Tax Disclosure [Abstract]
Income tax expense	$ (3,100,000)		$ (300,000)	$ (5,800,000)	$ (500,000)
Income Tax Credits and Adjustments	1,700,000			3,100,000
Unrecognized Tax Benefits	100,000	$ 100,000		100,000
Gross Unrecognized Tax Benefits Including Interest and Penalties	100,000	300,000		100,000
Net (increase) reduction in valuation allowance		(825,200,000)
Valuation allowance	41,200,000	41,200,000		41,200,000
Income Tax Contingency [Line Items]
Deferred Tax Assets, Gross	$ 860,700,000	$ 866,400,000		$ 860,700,000
Effective Income Tax Rate Reconciliation, Percent	24.50%			25.00%
Minimum [Member]
Income Tax Contingency [Line Items]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$ 0			$ 0
Maximum [Member]
Income Tax Contingency [Line Items]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$ 100,000			$ 100,000