Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2011
Component of income tax benefit (expense) in the consolidated statement of operations
Current federal income tax benefit	$ 0	$ 16,500	$ 2,600
Current state income tax benefit (expense)	1,600	3,600	(200)
Current income tax benefit	1,600	20,100	2,400
Deferred federal income tax benefit	0	0	0
Deferred state income tax benefit	0	0	0
Deferred income tax benefit	0	0	0
Federal income tax benefit	0	16,500	2,600
State income tax benefit	1,600	3,600	(200)
Income tax benefit	$ 1,600	$ 20,100	$ 2,400