Consolidated Statements Of Stockholders' Equity (USD $)	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Stockholders' Equity, beginning balance at Oct. 31, 2010	$ 964,941,000	$ 445,640,000	$ 519,831,000	$ (530,000)
Comprehensive Income
Net Income	113,568,000		113,568,000
Other comprehensive income	78,000			78,000
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	550,584,000	(452,000)
Comprehensive Income
Net Income	119,847,000		119,847,000
Other comprehensive income	147,000			147,000
Total comprehensive income	119,994,000
Common Stock Issued	22,198,000	22,198,000
Common Stock Repurchased	(26,528,000)	(26,528,000)
Tax Benefit from Dividends Paid on ESOP Shares	110,000		110,000
Dividends Declared	(85,693,000)		(85,693,000)
Income Loss Hedging Activities Of Equity Method Investments [Abstract]
Hedging activities of equity method investments	(305,000)
Stockholders' Equity, ending balance at Oct. 31, 2012	1,027,004,000	442,461,000	584,848,000	(305,000)
Comprehensive Income
Net Income	134,417,000		134,417,000
Other comprehensive income	21,000			21,000
Total comprehensive income	134,438,000
Common Stock Issued	119,552,000	119,552,000
Expenses From Issuance of Common Stock	(369,000)	(369,000)
Tax Benefit from Dividends Paid on ESOP Shares	117,000		117,000
Dividends Declared	(92,146,000)		(92,146,000)
Income Loss Hedging Activities Of Equity Method Investments [Abstract]
Hedging activities of equity method investments	(284,000)
Stockholders' Equity, ending balance at Oct. 31, 2013	$ 1,188,596,000	$ 561,644,000	$ 627,236,000	$ (284,000)