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Business Segments and International Operations (Revenue from External Customers by Product) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Aug. 31, 2019
Aug. 31, 2018
Aug. 31, 2019
Aug. 31, 2018
Segment Reporting Information [Line Items]        
Total revenue $ 106,716 $ 92,603 [1] $ 296,260 $ 280,877 [1]
Software licenses        
Segment Reporting Information [Line Items]        
Total revenue 30,686 22,852 [1] 83,216 71,432 [1]
Performance obligations transferred at a point in time | Software licenses        
Segment Reporting Information [Line Items]        
Total revenue 30,686 22,852 83,216 71,432
Performance obligations transferred over time | Maintenance        
Segment Reporting Information [Line Items]        
Total revenue 67,611 62,170 190,138 187,412
Performance obligations transferred over time | Services        
Segment Reporting Information [Line Items]        
Total revenue $ 8,419 $ 7,581 $ 22,906 $ 22,033
[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.