Business Segments and International Operations (Revenue from External Customers by Product) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	May 31, 2019	May 31, 2018		May 31, 2019	May 31, 2018
Segment Reporting Information [Line Items]
Total revenue	$ 99,995	$ 92,864	[1]	$ 189,544	$ 188,274	[1]
Software licenses
Segment Reporting Information [Line Items]
Total revenue	29,728	22,526	[1]	52,530	48,580	[1]
Performance obligations transferred at a point in time | Software licenses
Segment Reporting Information [Line Items]
Total revenue	29,728	22,526		52,530	48,580
Performance obligations transferred over time | Maintenance
Segment Reporting Information [Line Items]
Total revenue	62,528	63,058		122,527	125,242
Performance obligations transferred over time | Services
Segment Reporting Information [Line Items]
Total revenue	$ 7,739	$ 7,280		$ 14,487	$ 14,452

[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.