Restructuring - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Jul. 31, 2015	Aug. 01, 2014	Oct. 31, 2014	Dec. 05, 2013	Oct. 25, 2013
Restructuring And Related Activities [Abstract]
Total expected integration cost				$ 35,000
Restructuring expense	$ 10,100	$ 14,300	$ 20,400
Accrued restructuring	$ 4,195		$ 5,915		$ 0