Restructuring - Restructuring Reserve Roll Forward (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013
Restructuring Cost and Reserve [Line Items]
Beginning balance, July 31, 2013			$ 14,206
Restructuring charges in continuing operations	3,039	8,540	14,202	10,473
Restructuring Charges in Discontinued Operations			250
Non-cash write-offs			(267)	(3,701)
Cash payments			(21,314)
Ending balance, April 30, 2014	7,077		7,077
Asset Write Offs [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance, July 31, 2013			0
Restructuring charges in continuing operations	170	3,423	267	3,423
Restructuring Charges in Discontinued Operations			0
Non-cash write-offs			(267)
Cash payments			0
Ending balance, April 30, 2014	0		0
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance, July 31, 2013			11,475
Restructuring charges in continuing operations	1,782	2,863	9,547	4,796
Restructuring Charges in Discontinued Operations			250
Non-cash write-offs			0
Cash payments			(16,178)
Ending balance, April 30, 2014	5,094		5,094
Other Restructuring Cost [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance, July 31, 2013			2,731
Restructuring charges in continuing operations			4,388
Restructuring Charges in Discontinued Operations			0
Non-cash write-offs			0
Cash payments			(5,136)
Ending balance, April 30, 2014	$ 1,983		$ 1,983