Business Segments and International Operations (Income from Continuing Operations by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Feb. 28, 2019	Feb. 28, 2018
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue	$ 89,549	$ 95,410	[1]
Total costs of revenue and operating expenses	25,242	24,189
Total contribution margin	64,307	71,221
Other unallocated expenses	48,898	52,090
Income from operations	15,409	19,131	[1]
Other expense, net	(2,003)	(1,585)	[1]
Income before income taxes	13,406	17,546	[1]
OpenEdge
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue	65,252	66,663
Total costs of revenue and operating expenses	18,315	15,762
Total contribution margin	46,937	50,901
Data Connectivity and Integration
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue	6,000	9,492
Total costs of revenue and operating expenses	1,500	1,629
Total contribution margin	4,500	7,863
Application Development and Deployment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue	18,297	19,255
Total costs of revenue and operating expenses	5,427	6,798
Total contribution margin	$ 12,870	$ 12,457

[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.