Earnings (Loss) Per Share Calculation (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011
Numerator
Net loss	$ (29,817)	$ (31,450)	$ (105,250)	$ (173,192)
Denominator
Basic weighted average shares outstanding (in shares)	99,530	96,313	98,922	95,389
Dilutive weighted average shares outstanding (in shares)	99,530	96,313	98,922	95,389
Earning Per Share [Abstract]
Basic EPS (in dollars per share)	$ (0.30)	$ (0.33)	$ (1.06)	$ (1.82)
Diluted EPS (in dollars per share)	$ (0.30)	$ (0.33)	$ (1.06)	$ (1.82)