Restructuring Charges (Summary of Restructuring Activity) (Details) - USD ($) $ in Thousands	3 Months Ended
	Feb. 29, 2016	Feb. 28, 2015
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 3,361
Costs incurred	(66)	$ 2,344
Cash disbursements	(1,592)
Translation adjustments and other	15
Ending Balance	1,718
Excess Facilities and Other Costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	412
Costs incurred	76
Cash disbursements	(216)
Translation adjustments and other	5
Ending Balance	277
Employee Severance and Related Benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	2,949
Costs incurred	(142)
Cash disbursements	(1,376)
Translation adjustments and other	10
Ending Balance	1,441
2015 Restructuring Activities [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	2,617
Costs incurred	(123)
Cash disbursements	(1,159)
Translation adjustments and other	7
Ending Balance	1,342
2015 Restructuring Activities [Member] | Excess Facilities and Other Costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	0
Costs incurred	0
Cash disbursements	0
Translation adjustments and other	0
Ending Balance	0
2015 Restructuring Activities [Member] | Employee Severance and Related Benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	2,617
Costs incurred	(123)
Cash disbursements	(1,159)
Translation adjustments and other	7
Ending Balance	1,342
Telerik AD [Member] | 2015 Restructuring Activities [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	518
Costs incurred	52	$ 1,000
Cash disbursements	(351)
Translation adjustments and other	7
Ending Balance	226
Telerik AD [Member] | 2015 Restructuring Activities [Member] | Excess Facilities and Other Costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	209
Costs incurred	71
Cash disbursements	(134)
Translation adjustments and other	4
Ending Balance	150
Telerik AD [Member] | 2015 Restructuring Activities [Member] | Employee Severance and Related Benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance	309
Costs incurred	(19)
Cash disbursements	(217)
Translation adjustments and other	3
Ending Balance	$ 76