Consolidated Statements of Stockholders' Equity (Unaudited) (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)
Common Stock, Shares, Outstanding, Beginning Balance at Oct. 31, 2010		72,282,000
Comprehensive Income
Net income	123,145,000		123,145,000
Other comprehensive income (loss)	443,000			443,000
Total comprehensive income	123,588,000
Common Stock Issued	18,623,000	18,623,000
Common Stock Repurchased	(23,004,000)	(23,004,000)
Costs of Recission Offer	(6,000)		(6,000)
Tax Benefit from Dividends Paid On ESOP Shares	76,000		76,000
Dividends Declared	(61,980,000)		(61,980,000)
Common Stock Issued (Shares)		648,000
Common Stock Repurchased (Shares)		(800,000)
Stockholders' Equity, ending balance at Jul. 31, 2011	1,022,238,000	441,259,000	581,066,000	(87,000)
Common Stock, Shares, Outstanding, Ending Balance at Jul. 31, 2011		72,130,000
Stockholders' Equity, beginning balance at Oct. 31, 2011	996,923,000	446,791,000	550,584,000	(452,000)
Common Stock, Shares, Outstanding, Beginning Balance at Oct. 31, 2011	72,318,000	72,318,000
Comprehensive Income
Net income	121,806,000		121,806,000
Other comprehensive income (loss)	(2,000)			(2,000)
Total comprehensive income	121,804,000
Common Stock Issued	16,558,000	16,558,000
Common Stock Repurchased	(26,528,000)	(26,528,000)
Tax Benefit from Dividends Paid On ESOP Shares	82,000		82,000
Dividends Declared	(64,068,000)		(64,068,000)
Common Stock Issued (Shares)		545,000
Common Stock Repurchased (Shares)		(800,000)
Stockholders' Equity, ending balance at Jul. 31, 2012	$ 1,044,771,000	$ 436,821,000	$ 608,404,000	$ (454,000)
Common Stock, Shares, Outstanding, Ending Balance at Jul. 31, 2012	72,063,000	72,063,000