Business Segments and International Operations (Income from Continuing Operations by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Nov. 30, 2019	Aug. 31, 2019	May 31, 2019	Feb. 28, 2019	Nov. 30, 2018	Aug. 31, 2018	May 31, 2018	Feb. 28, 2018	Nov. 30, 2019	Nov. 30, 2018		Nov. 30, 2017
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue	$ 117,038	$ 106,716	$ 99,995	$ 89,549	$ 98,104	$ 92,603	$ 92,864	$ 95,410	$ 413,298	$ 378,981	[1]	$ 389,154	[1]
Gross profit	96,272	85,891	82,384	73,510	81,373	75,907	76,221	78,507	338,057	312,008	[1]	319,995	[1]
Income from operations	$ (6,026)	$ 15,960	$ 14,741	$ 15,409	$ 11,030	$ 19,103	$ 18,550	$ 19,131	40,084	67,814	[1]	57,490	[1]
Other expense, net									(11,589)	(7,018)	[1]	(5,027)	[1]
Income before income taxes									28,495	60,796	[1]	52,463	[1]
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue									413,298	378,981		389,154
Total costs of revenue and operating expenses									117,175	102,541		113,177
Gross profit									296,123	276,440		275,977
Operating Segments | OpenEdge
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue									296,929	277,806		279,823
Total costs of revenue and operating expenses									85,209	67,820		75,791
Gross profit									211,720	209,986		204,032
Operating Segments | Data Connectivity and Integration
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue									39,903	23,129		29,434
Total costs of revenue and operating expenses									7,973	7,634		10,270
Gross profit									31,930	15,495		19,164
Operating Segments | Application Development and Deployment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue									76,466	78,046		79,897
Total costs of revenue and operating expenses									23,993	27,087		27,116
Gross profit									52,473	50,959		52,781
Corporate And Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total costs of revenue and operating expenses									$ 256,039	$ 208,626		$ 218,487

[1] The Company adopted the accounting standard related to revenue recognition ("ASC 606") effective December 1, 2018 using the full retrospective method. See Note 1. Nature of Business and Summary of Significant Accounting Policies for further information.