Business Segments and International Operations (Revenue from External Customers by Product) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2018	May 31, 2017	May 31, 2018	May 31, 2017
Segment Reporting Information [Line Items]
Total revenue	$ 96,102	$ 93,213	$ 190,149	$ 184,183
Software licenses
Segment Reporting Information [Line Items]
Total revenue	26,439	25,592	51,782	49,914
Maintenance
Segment Reporting Information [Line Items]
Total revenue	62,323	59,898	123,802	119,036
Services
Segment Reporting Information [Line Items]
Total revenue	$ 7,340	$ 7,723	$ 14,565	$ 15,233