Business Segments and International Operations (Revenue from External Customers by Product) (Details) - USD ($) $ in Thousands	3 Months Ended
	Feb. 28, 2019	Feb. 28, 2018
Segment Reporting Information [Line Items]
Total revenue	$ 89,549	$ 95,410	[1]
Software licenses
Segment Reporting Information [Line Items]
Total revenue	22,802	26,054	[1]
Transferred at Point in Time | Software licenses
Segment Reporting Information [Line Items]
Total revenue	22,802	26,054
Transferred over Time | Maintenance
Segment Reporting Information [Line Items]
Total revenue	59,999	62,184
Transferred over Time | Services
Segment Reporting Information [Line Items]
Total revenue	$ 6,748	$ 7,172

[1] The Company adopted ASC 606 effective December 1, 2018 using the full retrospective method. See Note 1. Nature of Business and Basis of Presentation for further information.