Restructuring Charges (Summary of Restructuring Activity) (Details) - USD ($)	3 Months Ended		6 Months Ended
	May 31, 2017	May 31, 2016	May 31, 2017	May 31, 2016
Restructuring Reserve [Roll Forward]
Beginning Balance			$ 1,550,000
Costs incurred	$ 662,000	$ 331,000	17,801,000	$ 265,000
Cash disbursements			(11,630,000)
Asset impairment			(727,000)
Translation adjustments and other			218,000
Ending Balance	7,212,000		7,212,000
Excess Facilities and Other Costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance			107,000
Costs incurred			2,001,000
Cash disbursements			(640,000)
Asset impairment			(727,000)
Translation adjustments and other			6,000
Ending Balance	747,000		747,000
Employee Severance and Related Benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance			1,443,000
Costs incurred			15,800,000
Cash disbursements			(10,990,000)
Asset impairment			0
Translation adjustments and other			212,000
Ending Balance	6,465,000		6,465,000
2017 Restructuring Activities [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance			0
Costs incurred	600,000		17,724,000
Cash disbursements			(10,656,000)
Asset impairment			(727,000)
Translation adjustments and other			218,000
Ending Balance	6,559,000		6,559,000
2017 Restructuring Activities [Member] | Excess Facilities and Other Costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance			0
Costs incurred			1,924,000
Cash disbursements			(507,000)
Asset impairment			(727,000)
Translation adjustments and other			6,000
Ending Balance	696,000		696,000
2017 Restructuring Activities [Member] | Employee Severance and Related Benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance			0
Costs incurred			15,800,000
Cash disbursements			(10,149,000)
Asset impairment			0
Translation adjustments and other			212,000
Ending Balance	5,863,000		5,863,000
2016 Restructuring Activities [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance			1,415,000
Costs incurred	0		0
Cash disbursements			(826,000)
Ending Balance	589,000		589,000
2016 Restructuring Activities [Member] | Excess Facilities and Other Costs [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance			0
Cash disbursements			0
Ending Balance	0		0
2016 Restructuring Activities [Member] | Employee Severance and Related Benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning Balance			1,415,000
Cash disbursements			(826,000)
Ending Balance	$ 589,000		$ 589,000