Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2016	Aug. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 2,173	$ (3,956)	$ 43,902	$ 24,352
Other comprehensive income:
Amortization of terminated interest rate swap, net of tax benefit of $106, $104, $318 and $313, respectively	166	164	498	493
Comprehensive income	$ 2,339	$ (3,792)	$ 44,400	$ 24,845