Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Oct. 31, 2012
Income Tax Disclosure [Abstract]
Estimated annual effective tax rate	41.70%	39.80%
Income tax receivable	$ 1,300		$ 1,300
Total unrecognized tax benefits	15,800
Liability for uncertain tax positions noncurrent	6,790		6,736
Deferred income taxes (non-current assets)	9,000
Unrecognized tax benefits, would not affect the annual effective tax rate	14,700
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$ 2,700