Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 265	$ 2,173	$ 34,765	$ 43,902
Other comprehensive income:
Amortization of terminated interest rate swap, net of tax benefit of $313 and $310, respectively	167	166	501	498
Comprehensive income	$ 432	$ 2,339	$ 35,266	$ 44,400