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Basis of Presentation and Significant Accounting Policies (Tables)
 6 Months Ended
May 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Basic and Diluted Loss Per Share
Basic and diluted loss per share were calculated as follows (in thousands, except per share amounts): 
 
Six Months Ended May 31,
 
Three Months Ended May 31,
 
2013
 
2012
 
2013
 
2012
Numerator:
 
 
 
 
 
 
 
Net loss
$
(15,431
)
 
$
(69,938
)
 
$
(2,973
)
 
$
(24,136
)
Denominator:
 
 
 
 
 
 
 
Basic and diluted average shares outstanding
81,526

 
77,097

 
83,605

 
77,105

Basic and diluted loss per share
$
(.19
)
 
$
(.91
)
 
$
(.04
)
 
$
(.31
)