Intangible Assets and Goodwill (Schedule of Goodwill) (Details) $ in Thousands	3 Months Ended
Feb. 28, 2018 USD ($)
Goodwill [Roll Forward]
Balance, November 30, 2017	$ 315,041
Translation adjustments	65
Balance, February 28, 2018	315,106
OpenEdge [Member]
Goodwill [Roll Forward]
Balance, November 30, 2017	249,036
Translation adjustments	65
Balance, February 28, 2018	249,101
Data Connectivity and Integration [Member]
Goodwill [Roll Forward]
Balance, November 30, 2017	19,040
Translation adjustments	0
Balance, February 28, 2018	19,040
Application Development and Deployment [Member]
Goodwill [Roll Forward]
Balance, November 30, 2017	46,965
Translation adjustments	0
Balance, February 28, 2018	$ 46,965

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

Name:	us-gaap_Goodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant