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	126,419,000		126,419,000
Other Comprehensive Income (Loss)	(440,000)			(440,000)
Common Stock Issued	10,877,000	10,877,000
Common Stock Repurchased	(26,528,000)	(26,528,000)
Tax Benefit from Dividends Paid on ESOP Shares	54,000		54,000
Dividends Declared	(42,494,000)		(42,494,000)
Common Stock Issued (Shares)		361,000
Common Stock Repurchased (Shares)		(800,000)
Stockholders' Equity, ending balance at Apr. 30, 2012	1,064,811,000	431,140,000	634,563,000	(892,000)
Common Stock, Shares, Outstanding, Ending Balance at Apr. 30, 2012		71,879,000
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	141,713,000		141,713,000
Other Comprehensive Income (Loss)	156,000			156,000
Common Stock Issued	107,280,000	107,280,000
Expenses From Issuance of Common Stock	(358,000)	(358,000)
Tax Benefit from Dividends Paid on ESOP Shares	59,000		59,000
Dividends Declared	(45,123,000)		(45,123,000)
Common Stock Issued (Shares)		3,470,000
Stockholders' Equity, ending balance at Apr. 30, 2013	$ 1,230,731,000	$ 549,383,000	$ 681,497,000	$ (149,000)
Common Stock, Shares, Outstanding, Ending Balance at Apr. 30, 2013	75,720,000	75,720,000