Estimated Amortization Expense (Detail) - USD ($) $ in Thousands	Jan. 31, 2016	Jul. 31, 2015
Expected Amortization Expense [Line Items]
Estimated annual amortization expense, For the fiscal year ending July 31, 2016		$ 23,440
Estimated annual amortization expense, For the fiscal year ending July 31, 2017		20,671
Estimated annual amortization expense, For the fiscal year ending July 31, 2018		18,986
Estimated annual amortization expense, For the fiscal year ending July 31, 2019		16,975
Estimated annual amortization expense, For the fiscal year ending July 31, 2020		15,256
Estimated annual amortization expense, For the fiscal year ending July 31, 2021 and thereafter		73,690
Estimated annual amortization expense, Total	$ 157,136	$ 169,018