Earnings (Loss) Per Share Calculation (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013
Numerator
Net loss	$ (10,158)	$ (27,079)	$ (26,094)	$ (74,403)
Denominator
Weighted average basic common shares outstanding (in shares)	105,451	101,913	104,977	101,560
Weighted average dilutive potential common shares outstanding (in shares)	105,451	101,913	104,977	101,560
EPS
Basic EPS (in dollars per share)	$ (0.10)	$ (0.27)	$ (0.25)	$ (0.73)
Diluted EPS (in dollars per share)	$ (0.10)	$ (0.27)	$ (0.25)	$ (0.73)