Basis of Presentation and Significant Accounting Policies (Basic and Diluted Earnings (Loss) Per Share) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	May 31, 2013	May 31, 2012	May 31, 2013	May 31, 2012
Numerator:
Net loss	$ (2,973)	$ (24,136)	$ (15,431)	$ (69,938)
Denominator:
Basic and diluted average shares outstanding	83,605	77,105	81,526	77,097
Basic and diluted loss per share	$ (0.04)	$ (0.31)	$ (0.19)	$ (0.91)