Business Segments and International Operations (Revenue from External Customers by Revenue Type) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Nov. 30, 2019	Aug. 31, 2019	May 31, 2019	Feb. 28, 2019	Nov. 30, 2018	Aug. 31, 2018	May 31, 2018	Feb. 28, 2018	Nov. 30, 2019	Nov. 30, 2018		Nov. 30, 2017
Segment Reporting Information [Line Items]
Total revenue	$ 117,038	$ 106,716	$ 99,995	$ 89,549	$ 98,104	$ 92,603	$ 92,864	$ 95,410	$ 413,298	$ 378,981	[1]	$ 389,154	[1]
Software licenses
Segment Reporting Information [Line Items]
Total revenue									122,552	99,800	[1]	113,643	[1]
Transferred at Point in Time | Software licenses
Segment Reporting Information [Line Items]
Total revenue									122,552	99,800		113,643
Transferred over Time | Maintenance
Segment Reporting Information [Line Items]
Total revenue									259,006	249,171		243,508
Transferred over Time | Services
Segment Reporting Information [Line Items]
Total revenue									$ 31,740	$ 30,010		$ 32,003

[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.