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, 2020	Aug. 31, 2020	May 31, 2020	Feb. 29, 2020	Nov. 30, 2019	Aug. 31, 2019	May 31, 2019	Feb. 28, 2019	Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2018
Revenue from External Customer [Line Items]
Total revenue	$ 122,385	$ 109,699	$ 100,383	$ 109,683	$ 117,038	$ 106,716	$ 99,995	$ 89,549	$ 442,150	$ 413,298	$ 378,981	[1]
United States
Revenue from External Customer [Line Items]
Total revenue									240,717	213,252	187,627
Canada
Revenue from External Customer [Line Items]
Total revenue									20,281	20,659	16,630
EMEA
Revenue from External Customer [Line Items]
Total revenue									143,754	137,301	135,055
Latin America
Revenue from External Customer [Line Items]
Total revenue									14,574	19,665	18,046
Asia Pacific
Revenue from External Customer [Line Items]
Total revenue									$ 22,824	$ 22,421	$ 21,623

[1] (1)The Company adopted the accounting standard related to revenue recognition ("ASC 606") effective December 1, 2018 using the full retrospective method. See Note 1. Nature of Business and Summary of Significant Accounting Policies for further information.