Restructuring Charges (Summary of Restructuring Activity) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2013	Aug. 31, 2012
Restructuring Reserve [Roll Forward]
Costs incurred	$ 5,401	$ 1,411	$ 9,127	$ 6,147
2013 Restructuring Activities [Member]
Restructuring Reserve [Roll Forward]
Balance at the beginning of the period			0
Costs incurred			6,104
Cash disbursements			(1,040)
Asset impairment			0
Translation adjustments and other			14
Balance at the end of the period	5,078		5,078
2013 Restructuring Activities [Member] | Excess Facilities and Other Costs [Member]
Restructuring Reserve [Roll Forward]
Balance at the beginning of the period			0
Costs incurred			388
Cash disbursements			(20)
Asset impairment			0
Translation adjustments and other			0
Balance at the end of the period	368		368
2013 Restructuring Activities [Member] | Employee Severance and Related Benefits [Member]
Restructuring Reserve [Roll Forward]
Balance at the beginning of the period			0
Costs incurred			5,716
Cash disbursements			(1,020)
Asset impairment			0
Translation adjustments and other			14
Balance at the end of the period	4,710		4,710
2012 Restructuring Activities [Member]
Restructuring Reserve [Roll Forward]
Balance at the beginning of the period			7,032
Costs incurred			4,057
Cash disbursements			(9,212)
Asset impairment			(111)
Translation adjustments and other			22
Balance at the end of the period	1,788		1,788
2012 Restructuring Activities [Member] | Excess Facilities and Other Costs [Member]
Restructuring Reserve [Roll Forward]
Balance at the beginning of the period			603
Costs incurred			1,213
Cash disbursements			(668)
Asset impairment			(111)
Translation adjustments and other			(5)
Balance at the end of the period	1,032		1,032
2012 Restructuring Activities [Member] | Employee Severance and Related Benefits [Member]
Restructuring Reserve [Roll Forward]
Balance at the beginning of the period			6,429
Costs incurred			2,844
Cash disbursements			(8,544)
Asset impairment			0
Translation adjustments and other			27
Balance at the end of the period	$ 756		$ 756