Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Nov. 30, 2014	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2014
Component of income tax benefit (expense) in the consolidated statement of operations
Current federal income tax benefit		$ (1,900)	$ (1,400)	$ 100
Current state income tax benefit (expense)		(1,000)	(2,000)	(1,900)
Current income tax benefit		(2,900)	(3,400)	(1,800)
Deferred federal income tax benefit		(28,700)	(35,900)	646,000
Deferred state income tax benefit		(12,100)	(3,100)	179,200
Deferred income tax benefit		(40,800)	(39,000)	825,200
Federal income tax benefit		(30,600)	(37,300)	646,100
State income tax benefit		(13,100)	(5,100)	177,300
Income tax benefit	$ 824,200	$ (43,700)	$ (42,400)	$ 823,400