Fair Value Disclosures (Narratives) (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2013	Aug. 31, 2012	Nov. 30, 2012
Fair Value Disclosures [Abstract]
Impairment of Long-Lived Assets Held-for-use	$ 0	$ 6,400,000	$ 0	$ 22,900,000	$ 28,100,000
Long-lived assets held and used, carrying value					68,000,000
Estimate of Fair Value, Fair Value Disclosure
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Post Impairment Fair Value		$ 3,200,000		$ 30,600,000	$ 39,900,000