Stock Repurchase and Reissuance Activities (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Oct. 31, 2012		Oct. 31, 2011		Oct. 31, 2010
Stock Repurchase Program
Shares repurchased	2,474		15,144		8,236
Average purchase price	$ 29.64		$ 26.53		$ 22.43
Aggregate purchase price	$ 73,335	[1]	$ 401,836	[1]	$ 184,699	[1]
Reissuance of treasury stock	10,065		9,973		9,770

[1] Fiscal 2011 does not include $33.3 million equity forward contract related to the September 2011 ASR.