Restructuring Charges (Summary of Restructuring Activity) (Details) (USD $)	3 Months Ended		6 Months Ended
	May 31, 2013	May 31, 2012	May 31, 2013	May 31, 2012
Restructuring Reserve [Roll Forward]
Costs incurred	$ 2,766,000	$ 4,736,000	$ 3,726,000	$ 4,736,000
2012 Restructuring Activities [Member]
Restructuring Reserve [Roll Forward]
Balance at the beginning of the period			7,032,000
Costs incurred	2,800,000		4,149,000
Cash disbursements			(7,684,000)
Asset impairment			(111,000)
Translation adjustments and other			16,000
Balance at the end of the period	3,402,000		3,402,000
2012 Restructuring Activities [Member] | Excess Facilities and Other Costs [Member]
Restructuring Reserve [Roll Forward]
Balance at the beginning of the period			603,000
Costs incurred	200,000		1,096,000
Cash disbursements			(398,000)
Asset impairment			(111,000)
Translation adjustments and other			(18,000)
Balance at the end of the period	1,172,000		1,172,000
2012 Restructuring Activities [Member] | Employee Severance and Related Benefits [Member]
Restructuring Reserve [Roll Forward]
Balance at the beginning of the period			6,429,000
Costs incurred	2,600,000		3,053,000
Cash disbursements			(7,286,000)
Asset impairment			0
Translation adjustments and other			34,000
Balance at the end of the period	$ 2,230,000		$ 2,230,000