Expected Future Amortization Expense for Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2013
Finite Lived Intangible Assets And Liabilities Future Amortization Expense [Line Items]
Total amortization expense (Customer relationships and Developed Technology)	$ 49,370
Customer Relationships and Developed Technology
Finite Lived Intangible Assets And Liabilities Future Amortization Expense [Line Items]
Remaining nine months of Fiscal 2014	5,262
Fiscal 2015	7,017
Fiscal 2016	5,309
Fiscal 2017	5,085
Fiscal 2018	5,085
Thereafter	$ 21,612