Business Segments and International Operations (Income from Continuing Operations by Segment) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2017 USD ($)	May 31, 2016 USD ($)	May 31, 2017 USD ($) segment	May 31, 2016 USD ($)
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	$ 93,213	$ 96,118	$ 184,183	$ 185,599
Segment costs of revenue and operating expenses	24,347	30,154	52,022	59,930
Segment contribution margin	68,866	65,964	132,161	125,669
Other unallocated expenses	48,582	53,620	110,655	106,620
Income from operations	20,284	12,344	21,506	19,049
Other (expense) income, net	(1,552)	(1,361)	(2,899)	(3,186)
Income before income taxes	18,732	10,983	18,607	15,863
OpenEdge [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment revenue	65,890	66,928	130,398	131,061
Segment costs of revenue and operating expenses	16,287	17,296	34,164	35,360
Segment contribution margin	49,603	49,632	96,234	95,701
Data Connectivity and Integration [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment revenue	7,096	10,005	13,924	16,601
Segment costs of revenue and operating expenses	2,069	3,134	4,331	6,035
Segment contribution margin	5,027	6,871	9,593	10,566
Application Development and Deployment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment revenue	20,227	19,185	39,861	37,937
Segment costs of revenue and operating expenses	5,991	9,724	13,527	18,535
Segment contribution margin	$ 14,236	$ 9,461	$ 26,334	$ 19,402