Restructuring Charges (Summary of Restructuring Activity) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2016	May 31, 2015
Restructuring Reserve [Roll Forward]
Beginning Balance			$ 3,361
Costs incurred	$ 331	$ 3,810	265	$ 6,153
Cash disbursements			(2,484)
Translation adjustments and other			25
Ending Balance	1,167		1,167
Excess Facilities and Other Costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance			412
Costs incurred			306
Cash disbursements			(418)
Translation adjustments and other			6
Ending Balance	306		306
Employee Severance and Related Benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance			2,949
Costs incurred			(41)
Cash disbursements			(2,066)
Translation adjustments and other			19
Ending Balance	861		861
2015 Restructuring Activities [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance			2,617
Costs incurred	100		(22)
Cash disbursements			(1,799)
Translation adjustments and other			(16)
Ending Balance	812		812
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		0
2015 Restructuring Activities [Member] | Employee Severance and Related Benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance			2,617
Costs incurred			(22)
Cash disbursements			(1,799)
Translation adjustments and other			(16)
Ending Balance	812		812
Telerik AD [Member] | 2015 Restructuring Activities [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance			518
Costs incurred	200	$ 3,900	274	$ 4,900
Cash disbursements			(541)
Translation adjustments and other			7
Ending Balance	258		258
Telerik AD [Member] | 2015 Restructuring Activities [Member] | Excess Facilities and Other Costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance			209
Costs incurred			293
Cash disbursements			(274)
Translation adjustments and other			4
Ending Balance	232		232
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			(267)
Translation adjustments and other			3
Ending Balance	$ 26		$ 26