Business Segments and International Operations (Income from Continuing Operations by Segment) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2018 USD ($)	May 31, 2017 USD ($)	May 31, 2018 USD ($) segment	May 31, 2017 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment			3
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment revenue	$ 96,102	$ 93,213	$ 190,149	$ 184,183
Segment costs of revenue and operating expenses	22,886	24,347	47,075	52,022
Segment contribution margin	73,216	68,866	143,074	132,161
Other unallocated expenses	51,428	48,582	103,518	110,655
Income from operations	21,788	20,284	39,556	21,506
Other (expense) income, net	(1,284)	(1,552)	(2,869)	(2,899)
Income before income taxes	20,504	18,732	36,687	18,607
OpenEdge
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment revenue	69,967	65,890	136,375	130,398
Segment costs of revenue and operating expenses	15,013	16,287	30,775	34,164
Segment contribution margin	54,954	49,603	105,600	96,234
Data Connectivity and Integration
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment revenue	5,788	7,096	13,392	13,924
Segment costs of revenue and operating expenses	1,674	2,069	3,303	4,331
Segment contribution margin	4,114	5,027	10,089	9,593
Application Development and Deployment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment revenue	20,347	20,227	40,382	39,861
Segment costs of revenue and operating expenses	6,199	5,991	12,997	13,527
Segment contribution margin	$ 14,148	$ 14,236	$ 27,385	$ 26,334