Consolidated Statements Of Stockholders' Equity (USD $)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Stockholders' Equity, beginning balance at Oct. 31, 2008	$ 887,244,000	$ 471,565,000	$ 763,000	$ 414,246,000	$ 670,000
Comprehensive Income:
Net Income	122,824,000			122,824,000
Other comprehensive income:
Unrealized gain from hedging activities of equity method investments, net of tax	(6,032,000)				(6,032,000)
Reclassification adjustment of realized gain from hedging activities of equity method investments included in net income, net of tax	2,915,000				2,915,000
Total comprehensive income	119,707,000
Common Stock Issued	17,861,000	17,861,000
Common Stock Repurchased	(17,857,000)	(17,857,000)
Share-Based Compensation Expense	(730,000)		(730,000)
Dividends - Incentive Compensation Plan	0		(33,000)	33,000
Tax Benefit from Dividends Paid On ESOP Shares	93,000			93,000
Dividends Declared	(78,370,000)			(78,370,000)
Stockholders' Equity, ending balance at Oct. 31, 2009	927,948,000	471,569,000	0	458,826,000	(2,447,000)
Comprehensive Income:
Net Income	141,954,000			141,954,000
Other comprehensive income:
Unrealized gain from hedging activities of equity method investments, net of tax	(88,000)				(88,000)
Reclassification adjustment of realized gain from hedging activities of equity method investments included in net income, net of tax	2,005,000				2,005,000
Total comprehensive income	143,871,000
Common Stock Issued	21,366,000	21,366,000
Common Stock Repurchased	(47,276,000)	(47,276,000)
Rescission Offer	(19,000)	(19,000)
Costs Of Rescission Offer	(792,000)			(792,000)
Tax Benefit from Dividends Paid On ESOP Shares	98,000			98,000
Dividends Declared	(80,255,000)			(80,255,000)
Stockholders' Equity, ending balance at Oct. 31, 2010	964,941,000	445,640,000	0	519,831,000	(530,000)
Comprehensive Income:
Net Income	113,568,000			113,568,000
Other comprehensive income:
Unrealized gain from hedging activities of equity method investments, net of tax	(576,000)				(576,000)
Reclassification adjustment of realized gain from hedging activities of equity method investments included in net income, net of tax	654,000				654,000
Total comprehensive income	113,646,000
Common Stock Issued	24,155,000	24,155,000
Common Stock Repurchased	(23,004,000)	(23,004,000)
Costs Of Rescission Offer	(6,000)			(6,000)
Tax Benefit from Dividends Paid On ESOP Shares	104,000			104,000
Dividends Declared	(82,913,000)			(82,913,000)
Stockholders' Equity, ending balance at Oct. 31, 2011	$ 996,923,000	$ 446,791,000	$ 0	$ 550,584,000	$ (452,000)