Restructuring Charges (Summary of Restructuring Activity) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Aug. 31, 2019	Aug. 31, 2018	[1]	Aug. 31, 2019	Aug. 31, 2018	[1]
Restructuring Reserve [Roll Forward]
Beginning Balance				$ 311
Costs incurred	$ 801	$ 135		3,993	$ 2,382
Cash disbursements				(2,135)
Translation adjustments and other				(106)
Ending Balance	2,063			2,063
Excess Facilities and Other Costs
Restructuring Reserve [Roll Forward]
Beginning Balance				307
Costs incurred				676
Cash disbursements				(527)
Translation adjustments and other				(103)
Ending Balance	353			353
Employee Severance and Related Benefits
Restructuring Reserve [Roll Forward]
Beginning Balance				4
Costs incurred				3,317
Cash disbursements				(1,608)
Translation adjustments and other				(3)
Ending Balance	1,710			1,710
2019 Restructuring Activities
Restructuring Reserve [Roll Forward]
Beginning Balance				0
Costs incurred	600			3,313
Cash disbursements				(1,600)
Translation adjustments and other				(3)
Ending Balance	1,710			1,710
2019 Restructuring Activities | Excess Facilities and Other Costs
Restructuring Reserve [Roll Forward]
Beginning Balance				0
Costs incurred				0
Cash disbursements				0
Translation adjustments and other				0
Ending Balance	0			0
2019 Restructuring Activities | Employee Severance and Related Benefits
Restructuring Reserve [Roll Forward]
Beginning Balance				0
Costs incurred				3,313
Cash disbursements				(1,600)
Translation adjustments and other				(3)
Ending Balance	1,710			1,710
2017 Restructuring Activities
Restructuring Reserve [Roll Forward]
Beginning Balance				311
Costs incurred	200			680
Cash disbursements				(535)
Translation adjustments and other				(103)
2017 Restructuring Activities | Excess Facilities and Other Costs
Restructuring Reserve [Roll Forward]
Beginning Balance				307
Costs incurred				676
Cash disbursements				(527)
Translation adjustments and other				(103)
Ending Balance	353			353
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

[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.