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Restructuring Charges (Summary of Restructuring Activity) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Feb. 28, 2014
Feb. 28, 2013
Restructuring Reserve [Roll Forward]    
Costs incurred $ 196 $ 960
2013 Restructuring Activities [Member]
    
Restructuring Reserve [Roll Forward]    
Balance at the beginning of the period 1,646  
Costs incurred 159  
Cash disbursements (1,231)  
Translation adjustments and other (3)  
Balance at the end of the period 571  
2013 Restructuring Activities [Member] | Excess Facilities and Other Costs [Member]
    
Restructuring Reserve [Roll Forward]    
Balance at the beginning of the period 569  
Costs incurred 152  
Cash disbursements (250)  
Translation adjustments and other (7)  
Balance at the end of the period 464  
2013 Restructuring Activities [Member] | Employee Severance and Related Benefits [Member]
    
Restructuring Reserve [Roll Forward]    
Balance at the beginning of the period 1,077  
Costs incurred 7  
Cash disbursements (981)  
Translation adjustments and other 4  
Balance at the end of the period 107  
2012 Restructuring Activities [Member]
    
Restructuring Reserve [Roll Forward]    
Balance at the beginning of the period 906  
Costs incurred 37  
Cash disbursements (367)  
Translation adjustments and other (4)  
Balance at the end of the period 572  
2012 Restructuring Activities [Member] | Excess Facilities and Other Costs [Member]
    
Restructuring Reserve [Roll Forward]    
Balance at the beginning of the period 615  
Costs incurred 82  
Cash disbursements (192)  
Translation adjustments and other (6)  
Balance at the end of the period 499  
2012 Restructuring Activities [Member] | Employee Severance and Related Benefits [Member]
    
Restructuring Reserve [Roll Forward]    
Balance at the beginning of the period 291  
Costs incurred (45)  
Cash disbursements (175)  
Translation adjustments and other 2  
Balance at the end of the period $ 73