Restructuring - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2013	Jan. 31, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 4,031	$ 0	$ 4,031	$ 0
Employee Related [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,502
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,325
Americas [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,462
EMEA [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,017
Asia-Pacific [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	552
Asset Write-offs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 204		$ 204