Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Nov. 30, 2014	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2012
Component of income tax benefit (expense) in the consolidated statement of operations
Current federal income tax benefit		$ 100	$ 0	$ 16,500
Current state income tax benefit (expense)		(1,900)	1,600	3,600
Current income tax benefit		(1,800)	1,600	20,100
Deferred federal income tax benefit		646,000	0	0
Deferred state income tax benefit		179,200	0	0
Deferred income tax benefit		825,200	0	0
Federal income tax benefit		646,100	0	16,500
State income tax benefit		177,300	1,600	3,600
Income tax benefit	$ 824,200	$ 823,400	$ 1,600	$ 20,100