Restructuring Charges (Summary Of Restructuring Activity) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	May 31, 2012
2010 Restructuring Activities [Member]
Restructuring Reserve [Roll Forward]
Balance, December 1, 2011	$ 5,611
Cash disbursements	(1,639)
Translation adjustments and other	102
Balance, May 31, 2012	4,074
2010 Restructuring Activities [Member] | Excess Facilities And Other Costs [Member]
Restructuring Reserve [Roll Forward]
Balance, December 1, 2011	4,913
Cash disbursements	(1,448)
Translation adjustments and other	97
Balance, May 31, 2012	3,562
2010 Restructuring Activities [Member] | Employee Severance And Related Benefits [Member]
Restructuring Reserve [Roll Forward]
Balance, December 1, 2011	698
Cash disbursements	(191)
Translation adjustments and other	5
Balance, May 31, 2012	512
2012 Restructuring Activities [Member]
Restructuring Reserve [Roll Forward]
Balance, December 1, 2011	0
Costs incurred	8,496
Cash disbursements	(628)
Asset impairment	(848)
Translation adjustments and other	(35)
Balance, May 31, 2012	6,985
2012 Restructuring Activities [Member] | Excess Facilities And Other Costs [Member]
Restructuring Reserve [Roll Forward]
Balance, December 1, 2011	0
Costs incurred	1,479
Cash disbursements	(290)
Asset impairment	(848)
Balance, May 31, 2012	341
2012 Restructuring Activities [Member] | Employee Severance And Related Benefits [Member]
Restructuring Reserve [Roll Forward]
Balance, December 1, 2011	0
Costs incurred	7,017
Cash disbursements	(338)
Translation adjustments and other	(35)
Balance, May 31, 2012	$ 6,644