Restructuring Charges (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014	Nov. 30, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 3,810	$ 124	$ 6,153	$ 320
2015 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	3,900		4,868
Restructuring reserve	201		201		$ 0
2015 Restructuring Activities [Member] | Other accrued liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	200		200
2014 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expenses			1,329
Restructuring reserve	923		923		1,227
2014 Restructuring Activities [Member] | Other accrued liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Short-term restructuring reserves	900		900
2012 and 2013 Restructuring Activities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expenses			(44)	$ 300
Restructuring reserve	214		214		$ 416
Long-term restructuring reserves	100		100
2012 and 2013 Restructuring Activities [Member] | Other accrued liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	100		100
Level 3 [Member] | Nonrecurring Basis [Member]
Restructuring Cost and Reserve [Line Items]
Long-lived assets at fair value	$ 60		$ 60