Business Segments and International Operations (Income from Continuing Operations by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Feb. 29, 2020	Feb. 28, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue	$ 109,683	$ 89,549
Total costs of revenue and operating expenses	29,718	25,242
Total contribution margin	79,965	64,307
Other unallocated expenses	49,253	48,898
Income from operations	30,712	15,409
Other expense, net	(3,397)	(2,003)
Income before income taxes	27,315	13,406
OpenEdge
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue	77,079	65,252
Total costs of revenue and operating expenses	19,750	18,315
Total contribution margin	57,329	46,937
Data Connectivity and Integration
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue	13,685	6,000
Total costs of revenue and operating expenses	2,680	1,500
Total contribution margin	11,005	4,500
Application Development and Deployment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue	18,919	18,297
Total costs of revenue and operating expenses	7,288	5,427
Total contribution margin	$ 11,631	$ 12,870