Business Segments and International Operations (Revenue from External Customers by Product) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2020	May 31, 2019
Segment Reporting Information [Line Items]
Total revenue	$ 100,383	$ 99,995	$ 210,066	$ 189,544
Software licenses
Segment Reporting Information [Line Items]
Total revenue	19,663	29,728	50,292	52,530
Performance obligations transferred at a point in time | Software licenses
Segment Reporting Information [Line Items]
Total revenue	19,663	29,728	50,292	52,530
Performance obligations transferred over time | Maintenance
Segment Reporting Information [Line Items]
Total revenue	71,686	62,528	141,742	122,527
Performance obligations transferred over time | Services
Segment Reporting Information [Line Items]
Total revenue	$ 9,034	$ 7,739	$ 18,032	$ 14,487