Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Earnings Per Share [Abstract]
Net Income (Loss)	$ (7,344)	$ (2,293)	$ 152,768	$ 139,420
Average shares of common stock outstanding for basic earnings per share	78,185	75,774	77,715	74,521
Contingently issuable shares under incentive compensation plans	0	0	312	330
Contingently issuable shares under forward sale agreements		0		136
Average shares of dilutive stock	78,185	75,774	78,027	74,987
Basic (usd per share)	$ (0.09)	$ (0.03)	$ 1.97	$ 1.87
Diluted (usd per share)	$ (0.09)	$ (0.03)	$ 1.96	$ 1.86
Stock Compensation Plan [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Contingently issuable shares that would have been antidilutive	301	316
Forward Sale Agreement [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Contingently issuable shares that would have been antidilutive		192