Earnings (Loss) Per Share Calculation (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
Numerator
Net loss	$ (144,021)	$ (195,521)	$ (333,514)
Denominator
Basic weighted average shares outstanding (in shares)	99,341	95,854	93,103
Dilutive weighted average shares outstanding (in shares)	99,341	95,854	93,103
Earning Per Share [Abstract]
Basic EPS (in dollars per share)	$ (1.45)	$ (2.04)	$ (3.58)
Diluted EPS (in dollars per share)	$ (1.45)	$ (2.04)	$ (3.58)