Net Restructuring and Related Charges (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended				12 Months Ended
	May 31, 2013	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2016		Jul. 31, 2015		Jul. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring Charge						$ 9,641	[1],[2]	$ (354)	[1],[2]	$ 3,483
Fiscal Year 2016 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Charge		$ 1,400	$ 1,800	$ 3,100	$ 3,300	$ 9,600
Fiscal Year 2014 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Charge								(300)		2,900
2013 Acquisition Related Charges
Restructuring Cost and Reserve [Line Items]
Restructuring Charge										800
Fiscal Year 2013 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Charge	$ 4,100							$ (100)		$ (200)

[1] Activity in fiscal year 2015 pertains to both the Fiscal Year 2014 Restructuring Plan and the 2013 Restructuring Plan. In fiscal year 2015, the restructuring adjustments of ($0.3) million and cash payments of ($2.4) million relate to the Fiscal Year 2014 Restructuring Plan, while restructuring adjustments of ($0.1) million and cash payments of ($0.5) million relate to the Fiscal Year 2013 Restructuring Plan.

[2] Activity in fiscal year 2016 pertains to the Fiscal Year 2016 Restructuring Plan, the Fiscal Year 2014 Restructuring Plan and the 2013 Restructuring Plan. In fiscal year 2016, there were restructuring charges of $9.6 million and cash payments of ($4.4) million related to the Fiscal Year 2016 Restructuring Plan, while there were cash payments of ($0.2) million and ($0.4) million related to the Fiscal Year 2014 Restructuring Plan and Fiscal Year 2013 Restructuring Plan, respectively.