Stockholders' Equity (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
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income from equity method investments	$ 5,043	$ 3,652	$ 29,345	$ 23,244
Income taxes	(1,718)	(603)	(10,050)	(8,152)
Net income	(7,344)	(2,293)	152,768	139,420
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding, Beginning Balance			76,099
Common Stock, Value, Issued, Beginning Balance			561,644
Issued to participants in the Employee Stock Purchase Plan (ESPP) (in shares)			25
Issued to participants in the Employee Stock Purchase Plan (ESPP)			832
Issued to the Dividend Reinvestment and Stock Purchase Plan (in shares)			510
Issued to the Dividend Reinvestment and Stock Purchase Plan			17,084
Issued to participants in the Incentive Compensation Plan (ICP) (in shares)			93
Issued to participants in the Incentive Compensation Plan (ICP)			3,046
Issued through forward sale agreements, net of expenses (in shares)			1,600
Issued through forward sale agreements, net of expenses			47,290
Common Stock, Shares, Outstanding, Ending Balance	78,327		78,327
Common Stock, Value, Issued, Ending Balance	629,896		629,896
Cash dividends paid per share of common stock (usd per share)	$ 0.32	$ 0.31	$ 0.95	$ 0.92
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated OCIL beginning balance, net of tax	20	(149)	(284)	(305)
Total other comprehensive income (loss)	(128)	(88)	176	68
Accumulated OCIL ending balance, net of tax	(108)	(237)	(108)	(237)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	(118)	(52)	(340)	45
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
OCIL before reclassifications, net of tax	(10)	(36)	516	23
Amounts reclassified from accumulated OCIL, net of tax	(93)	(52)	(315)	45
Total other comprehensive income (loss)	(103)	(88)	201	68
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income from equity method investments	(152)	(85)	(514)	75
Income taxes	59	33	199	(30)
Net income	(93)	(52)	(315)	45
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Total other comprehensive income (loss)	(25)		(25)
Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income from equity method investments	(41)		(41)
Income taxes	16		16
Net income	$ (25)		$ (25)