Business Segments and International Operations (Revenue from External Customers from Different Geographical Areas) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Nov. 30, 2016	Aug. 31, 2016	May 31, 2016	Feb. 29, 2016	Nov. 30, 2015	Aug. 31, 2015	May 31, 2015	Feb. 28, 2015	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2014
Revenue from External Customer [Line Items]
Total revenue	$ 117,724	$ 102,018	$ 96,118	$ 89,481	$ 112,719	$ 94,637	$ 88,817	$ 81,381	$ 405,341	$ 377,554	$ 332,533
United States [Member]
Revenue from External Customer [Line Items]
Total revenue									212,312	193,665	137,105
Canada [Member]
Revenue from External Customer [Line Items]
Total revenue									16,891	13,901	13,611
EMEA [Member]
Revenue from External Customer [Line Items]
Total revenue									130,818	124,171	131,335
Latin America [Member]
Revenue from External Customer [Line Items]
Total revenue									21,156	17,594	24,917
Asia Pacific [Member]
Revenue from External Customer [Line Items]
Total revenue									$ 24,164	$ 28,223	$ 25,565