Fair Value Disclosures (Narratives) (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	May 31, 2013	May 31, 2012	May 31, 2013	May 31, 2012	Nov. 30, 2012
Fair Value Disclosures [Abstract]
Impairment of Long-Lived Assets Held-for-use	$ 0	$ 9,900,000	$ 0	$ 16,500,000	$ 28,100,000
Long-lived assets held and used, carrying value					68,000,000
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Post Impairment Fair Value		15,200,000
Estimate of Fair Value, Fair Value Disclosure
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Post Impairment Fair Value				$ 27,400,000	$ 39,900,000