Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (USD $) In Thousands, unless otherwise specified	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Stockholders' Equity, beginning balance at Oct. 31, 2013	$ 1,188,596	$ 561,644	$ 627,236	$ (284)
Common Stock, Shares, Outstanding, Beginning Balance at Oct. 31, 2013		76,099
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	97,572		97,572
Other Comprehensive Income (Loss)	311			311
Common Stock Issued	54,349	54,349
Common Stock Issued (Shares)		1,823
Tax Benefit from Dividends Paid on ESOP Shares	29		29
Dividends Declared	(24,113)		(24,113)
Stockholders' Equity, ending balance at Jan. 31, 2014	1,316,744	615,993	700,724	27
Common Stock, Shares, Outstanding, Ending Balance at Jan. 31, 2014		77,922
Stockholders' Equity, beginning balance at Oct. 31, 2014	1,308,602	636,835	672,004	(237)
Common Stock, Shares, Outstanding, Beginning Balance at Oct. 31, 2014	78,531	78,531
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	92,978		92,978
Other Comprehensive Income (Loss)	(827)			(827)
Common Stock Issued	8,995	8,995
Common Stock Issued (Shares)		236
Expenses from Issuance of Common Stock	(137)	(137)
Tax Benefit from Dividends Paid on ESOP Shares	32		32
Dividends Declared	(25,168)		(25,168)
Stockholders' Equity, ending balance at Jan. 31, 2015	$ 1,384,475	$ 645,693	$ 739,846	$ (1,064)
Common Stock, Shares, Outstanding, Ending Balance at Jan. 31, 2015	78,767	78,767