Restructuring (Narrative) (Details) $ in Thousands	3 Months Ended			12 Months Ended
	Feb. 29, 2016 USD ($)	May 31, 2015 USD ($)	Feb. 28, 2015 facility	Nov. 30, 2016 USD ($)	Nov. 30, 2015 USD ($)	Nov. 30, 2014 USD ($)	Nov. 30, 2013 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring expenses				$ 1,692	$ 12,989	$ 2,294
Restructuring reserve				1,550	3,361	1,643	$ 2,552
2016 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expenses				1,482
Restructuring reserve				1,415	0
2015 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expenses				(42)	4,071
Restructuring reserve				28	2,617	0
2012 - 2014 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expenses				(31)	1,404	2,294
Restructuring reserve				50	227	1,643	$ 2,552
Other Accrued Liabilities [Member] | 2016 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve				1,400
Other Accrued Liabilities [Member] | 2012 - 2014 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve				100
Telerik AD [Member]
Restructuring Cost and Reserve [Line Items]
Number of facilities closed | facility			2
Impairment of long-lived assets held-for-use		$ 4,000
Telerik AD [Member] | 2015 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 300			283	7,514
Restructuring reserve				57	518	$ 0
Telerik AD [Member] | Other Accrued Liabilities [Member] | 2015 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Short-term restructuring reserves				$ 100
Level 3 [Member] | Nonrecurring Basis [Member]
Restructuring Cost and Reserve [Line Items]
Property and equipment, estimated fair value					$ 60
Level 3 [Member] | Nonrecurring Basis [Member] | Telerik AD [Member]
Restructuring Cost and Reserve [Line Items]
Property and equipment, estimated fair value		$ 100