Selected Quarterly Financial Data (unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Nov. 30, 2015	Aug. 31, 2015	May. 31, 2015	Feb. 28, 2015	Nov. 30, 2014	Aug. 31, 2014	May. 31, 2014	Feb. 28, 2014	Nov. 30, 2015	Nov. 30, 2014	Nov. 30, 2013
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 112,719	$ 94,637	$ 88,817	$ 81,381	$ 97,894	$ 79,274	$ 80,827	$ 74,538	$ 377,554	$ 332,533	$ 333,996
Gross profit	97,483	79,505	73,071	63,753	86,755	71,413	73,449	66,657	313,812	298,274	299,014
(Loss) income from operations	20,081	8,594	(2,735)	(11,186)	27,027	19,431	20,280	14,002	14,754	80,740	63,740
Net (loss) income	$ (9,473)	$ (4,126)	$ 5,769	$ (971)	$ 14,464	$ 11,095	$ 12,799	$ 11,100	$ (8,801)	$ 49,458	$ 74,907
Basic (loss) earnings per share (in dollars per share)	$ (0.19)	$ (0.08)	$ 0.11	$ (0.02)	$ 0.29	$ 0.22	$ 0.25	$ 0.22	$ (0.17)	$ 0.97	$ 0.73
Diluted (loss) earnings per share (in dollars per share)	$ (0.19)	$ (0.08)	$ 0.11	$ (0.02)	$ 0.28	$ 0.22	$ 0.25	$ 0.21	$ (0.17)	$ 0.96	$ 0.72