Income Taxes - Unrecognized Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Jan. 31, 2013	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011
Income Tax Disclosure [Abstract]
Balance at beginning of year	$ 3,140	$ 3,140	$ 2,576	$ 4,078
Additions based on tax positions related to the current year		703	148	387
Additions for tax positions of prior years		3,261	896	138
Reductions for tax positions of prior years		(317)
Settlements			0	(2,027)
Lapse of statute of limitations	(900)	(1,070)	(480)
Balance at end of year		$ 5,717	$ 3,140	$ 2,576