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, 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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	121,806,000		121,806,000
Other Comprehensive Income (Loss)	(2,000)			(2,000)
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
Stockholders' Equity, beginning balance at Oct. 31, 2012	1,027,004,000	442,461,000	584,848,000	(305,000)
Common Stock, Shares, Outstanding, Beginning Balance at Oct. 31, 2012	72,250,000	72,250,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	139,420,000		139,420,000
Other Comprehensive Income (Loss)	68,000			68,000
Common Stock Issued	113,832,000	113,832,000
Expenses From Issuance of Common Stock	(358,000)	(358,000)
Tax Benefit from Dividends Paid on ESOP Shares	88,000		88,000
Dividends Declared	(68,605,000)		(68,605,000)
Common Stock Issued (Shares)		3,667,000
Stockholders' Equity, ending balance at Jul. 31, 2013	$ 1,211,449,000	$ 555,935,000	$ 655,751,000	$ (237,000)
Common Stock, Shares, Outstanding, Ending Balance at Jul. 31, 2013	75,917,000	75,917,000