Earnings (Loss) Per Share Calculation (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012
Numerator
Net loss	$ (1,231)	$ (29,817)	$ (75,634)	$ (105,250)
Denominator
Weighted average basic common shares outstanding (in shares)	102,713	99,530	101,951	98,922
Weighted average dilutive potential common shares outstanding (in shares)	102,713	99,530	101,951	98,922
Earning Per Share [Abstract]
Basic EPS (in dollars per share)	$ (0.01)	$ (0.30)	$ (0.74)	$ (1.06)
Diluted EPS (in dollars per share)	$ (0.01)	$ (0.30)	$ (0.74)	$ (1.06)