Income Tax Expense Benefit (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011
Current:
Federal	$ 63,923	$ 23,641	$ (84,207)
State	5,589	992	(4,420)
Current Income Tax Expense (Benefit), Total	69,512	24,633	(88,627)
Deferred:
Federal	(1,389)	6,435	23,656
State	(5,450)	(40)	(11,869)
Change in valuation allowance	6,823	1,600	9,675
Deferred income taxes	(16)	7,995	21,462
Income tax expense (benefit)	$ 69,496	$ 32,628	$ (67,165)