Stock Repurchase Program - Stock Repurchase Activities (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Stock Repurchase Program
Shares repurchased (in shares)	678	0	3,968	2,050
Total cost of the repurchase shares	$ 36,000	$ 0	$ 180,000	$ 79,747
Reissuance of treasury stock (in shares)	1,553	931	3,931	3,519