Earnings (Loss) Per Share Calculation (Details) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2011	Jul. 31, 2010
Numerator
Net loss	$ (31,450)	$ (109,855)	$ (173,192)	$ (253,197)
Denominator
Basic weighted average shares outstanding	96,313	92,906	95,389	92,851
Dilutive weighted average shares outstanding	96,313	92,906	95,389	92,851
Earning Per Share [Abstract]
Basic EPS	$ (0.33)	$ (1.18)	$ (1.82)	$ (2.73)
Diluted EPS	$ (0.33)	$ (1.18)	$ (1.82)	$ (2.73)