Earnings per Share and Stock-Based Compensation - Reconciliation of Denominator of Each Net Income/(Loss) Per Share (Parenthetical) (Detail)	3 Months Ended		9 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012
Dilutive stock options and restricted stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Additional shares outstanding were excluded from calculation of diluted EPS	5,763,000	11,958,000	6,286,000	10,995,000
Shares outstanding were excluded from calculation of diluted EPS			4,016,000	3,345,000
Dilutive stock warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Additional shares outstanding were excluded from calculation of diluted EPS	6,910,000	18,191,000	8,058,000	13,828,000
Shares outstanding were excluded from calculation of diluted EPS			17,596,000	11,826,000