Restructuring (Summary of Restructuring Activity) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Feb. 29, 2016	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2014
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 3,361,000	$ 3,361,000	$ 1,643,000	$ 2,552,000
Costs incurred		1,692,000	12,989,000	2,294,000
Cash disbursements		(3,539,000)	(6,343,000)	(3,175,000)
Asset impairment		(97,051,000)	(4,962,000)	0
Translation adjustments and other		36,000	34,000	(28,000)
Ending Balance		1,550,000	3,361,000	1,643,000
Excess Facilities and Other Costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	412,000	412,000	416,000	1,184,000
Costs incurred		319,000	5,567,000	579,000
Cash disbursements		(633,000)	(690,000)	(1,316,000)
Asset impairment			(4,962,000)
Translation adjustments and other		9,000	81,000	(31,000)
Ending Balance		107,000	412,000	416,000
Employee Severance and Related Benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	2,949,000	2,949,000	1,227,000	1,368,000
Costs incurred		1,373,000	7,422,000	1,715,000
Cash disbursements		(2,906,000)	(5,653,000)	(1,859,000)
Asset impairment			0
Translation adjustments and other		27,000	(47,000)	3,000
Ending Balance		1,443,000	2,949,000	1,227,000
2016 Restructuring Activities [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	0	0
Costs incurred		1,482,000
Cash disbursements		(67,000)
Ending Balance		1,415,000	0
2016 Restructuring Activities [Member] | Excess Facilities and Other Costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	0	0
Costs incurred		0
Cash disbursements		0
Ending Balance		0	0
2016 Restructuring Activities [Member] | Employee Severance and Related Benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	0	0
Costs incurred		1,482,000
Cash disbursements		(67,000)
Ending Balance		1,415,000	0
2015 Restructuring Activities [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	2,617,000	2,617,000	0
Costs incurred		(42,000)	4,071,000
Cash disbursements		(2,572,000)	(483,000)
Asset impairment			(963,000)
Translation adjustments and other		25,000	(8,000)
Ending Balance		28,000	2,617,000	0
2015 Restructuring Activities [Member] | Excess Facilities and Other Costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	0	0	0
Costs incurred		0	963,000
Cash disbursements		0	0
Asset impairment			(963,000)
Translation adjustments and other		0	0
Ending Balance		0	0	0
2015 Restructuring Activities [Member] | Employee Severance and Related Benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	2,617,000	2,617,000	0
Costs incurred		(42,000)	3,108,000
Cash disbursements		(2,572,000)	(483,000)
Asset impairment			0
Translation adjustments and other		25,000	(8,000)
Ending Balance		28,000	2,617,000	0
2012 - 2014 Restructuring Activities [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	227,000	227,000	1,643,000	2,552,000
Costs incurred		(31,000)	1,404,000	2,294,000
Cash disbursements		(156,000)	(2,759,000)	(3,175,000)
Translation adjustments and other		10,000	(61,000)	(28,000)
Ending Balance		50,000	227,000	1,643,000
2012 - 2014 Restructuring Activities [Member] | Excess Facilities and Other Costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	203,000	203,000	416,000	1,184,000
Costs incurred		(7,000)	198,000	579,000
Cash disbursements		(156,000)	(390,000)	(1,316,000)
Translation adjustments and other		10,000	(21,000)	(31,000)
Ending Balance		50,000	203,000	416,000
2012 - 2014 Restructuring Activities [Member] | Employee Severance and Related Benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	24,000	24,000	1,227,000	1,368,000
Costs incurred		(24,000)	1,206,000	1,715,000
Cash disbursements		0	(2,369,000)	(1,859,000)
Translation adjustments and other		0	(40,000)	3,000
Ending Balance		0	24,000	1,227,000
Telerik AD [Member] | 2015 Restructuring Activities [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	518,000	518,000	0
Costs incurred	300,000	283,000	7,514,000
Cash disbursements		(744,000)	(3,101,000)
Asset impairment			(3,999,000)
Translation adjustments and other		0	104,000
Ending Balance		57,000	518,000	0
Telerik AD [Member] | 2015 Restructuring Activities [Member] | Excess Facilities and Other Costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	209,000	209,000	0
Costs incurred		326,000	4,406,000
Cash disbursements		(477,000)	(300,000)
Asset impairment			(3,999,000)
Translation adjustments and other		(1,000)	102,000
Ending Balance		57,000	209,000	0
Telerik AD [Member] | 2015 Restructuring Activities [Member] | Employee Severance and Related Benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 309,000	309,000	0
Costs incurred		(43,000)	3,108,000
Cash disbursements		(267,000)	(2,801,000)
Asset impairment			0
Translation adjustments and other		1,000	2,000
Ending Balance		$ 0	$ 309,000	$ 0