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Restructuring Charges (Summary of Restructuring Activity) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
May. 31, 2015
May. 31, 2014
May. 31, 2015
May. 31, 2014
Restructuring Reserve [Roll Forward]        
Costs incurred $ 3,810 $ 124 $ 6,153 $ 320
2015 Restructuring Activities [Member]        
Restructuring Reserve [Roll Forward]        
Beginning Balance     0  
Costs incurred 3,900   4,868  
Cash disbursements     (818)  
Asset impairment     (3,947)  
Translation adjustments and other     98  
Ending Balance 201   201  
2015 Restructuring Activities [Member] | Excess Facilities and Other Costs [Member]        
Restructuring Reserve [Roll Forward]        
Beginning Balance     0  
Costs incurred     4,010  
Cash disbursements     (36)  
Asset impairment     (3,947)  
Translation adjustments and other     102  
Ending Balance 129   129  
2015 Restructuring Activities [Member] | Employee Severance and Related Benefits [Member]        
Restructuring Reserve [Roll Forward]        
Beginning Balance     0  
Costs incurred     858  
Cash disbursements     (782)  
Asset impairment     0  
Translation adjustments and other     (4)  
Ending Balance 72   72  
2014 Restructuring Activities [Member]        
Restructuring Reserve [Roll Forward]        
Beginning Balance     1,227  
Costs incurred     1,329  
Cash disbursements     (1,597)  
Translation adjustments and other     (36)  
Ending Balance 923   923  
2014 Restructuring Activities [Member] | Excess Facilities and Other Costs [Member]        
Restructuring Reserve [Roll Forward]        
Beginning Balance     0  
Costs incurred     125  
Cash disbursements     (16)  
Translation adjustments and other     0  
Ending Balance 109   109  
2014 Restructuring Activities [Member] | Employee Severance and Related Benefits [Member]        
Restructuring Reserve [Roll Forward]        
Beginning Balance     1,227  
Costs incurred     1,204  
Cash disbursements     (1,581)  
Translation adjustments and other     (36)  
Ending Balance 814   814  
2012 and 2013 Restructuring Activities [Member]        
Restructuring Reserve [Roll Forward]        
Beginning Balance     416  
Costs incurred     (44) $ 300
Cash disbursements     (138)  
Translation adjustments and other     (20)  
Ending Balance 214   214  
2012 and 2013 Restructuring Activities [Member] | Excess Facilities and Other Costs [Member]        
Restructuring Reserve [Roll Forward]        
Beginning Balance     416  
Costs incurred     (44)  
Cash disbursements     (138)  
Translation adjustments and other     (20)  
Ending Balance 214   214  
2012 and 2013 Restructuring Activities [Member] | Employee Severance and Related Benefits [Member]        
Restructuring Reserve [Roll Forward]        
Beginning Balance     0  
Costs incurred     0  
Cash disbursements     0  
Translation adjustments and other     0  
Ending Balance $ 0   $ 0