Restructuring Charges (Summary of Restructuring Activity) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	May 31, 2019	May 31, 2018	[1]	May 31, 2019	May 31, 2018	[1]
Restructuring Reserve [Roll Forward]
Beginning Balance				$ 311
Costs incurred	$ 2,777	$ 426		3,192	$ 2,247
Cash disbursements				(757)
Translation adjustments and other				(95)
Ending Balance	2,651			2,651
Excess Facilities and Other Costs
Restructuring Reserve [Roll Forward]
Beginning Balance				307
Costs incurred				486
Cash disbursements				(305)
Translation adjustments and other				(95)
Ending Balance	393			393
Employee Severance and Related Benefits
Restructuring Reserve [Roll Forward]
Beginning Balance				4
Costs incurred				2,706
Cash disbursements				(452)
Translation adjustments and other				0
Ending Balance	2,258			2,258
2019 Restructuring Activities
Restructuring Reserve [Roll Forward]
Beginning Balance				0
Costs incurred				2,702
Cash disbursements				(444)
2019 Restructuring Activities | Excess Facilities and Other Costs
Restructuring Reserve [Roll Forward]
Beginning Balance				0
Costs incurred				0
Cash disbursements				0
Ending Balance	0			0
2019 Restructuring Activities | Employee Severance and Related Benefits
Restructuring Reserve [Roll Forward]
Beginning Balance				0
Costs incurred				2,702
Cash disbursements				(444)
Ending Balance	2,258			2,258
2017 Restructuring Activities
Restructuring Reserve [Roll Forward]
Beginning Balance				311
Costs incurred	100			490
Cash disbursements				(313)
Translation adjustments and other				(95)
2017 Restructuring Activities | Excess Facilities and Other Costs
Restructuring Reserve [Roll Forward]
Beginning Balance				307
Costs incurred				486
Cash disbursements				(305)
Translation adjustments and other				(95)
Ending Balance	393			393
2017 Restructuring Activities | Employee Severance and Related Benefits
Restructuring Reserve [Roll Forward]
Beginning Balance				4
Costs incurred				4
Cash disbursements				(8)
Translation adjustments and other				0
Ending Balance	0			0
Other accrued liabilities | 2019 Restructuring Activities
Restructuring Reserve [Roll Forward]
Ending Balance	2,258			2,258
Other accrued liabilities | 2017 Restructuring Activities
Restructuring Reserve [Roll Forward]
Ending Balance	$ 393			$ 393

[1] The Company adopted ASC 606 effective December 1, 2018 using the full retrospective method. See Note 1. Nature of Business and Basis of Presentation for further information.