Estimated Amortization Expense (Detail) $ in Thousands	Jul. 31, 2019 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Estimated annual amortization expense, For the fiscal year ending July 31, 2020	$ 97,337
Estimated annual amortization expense, For the fiscal year ending July 31, 2021	103,968
Estimated annual amortization expense, For the fiscal year ending July 31, 2022	107,530
Estimated annual amortization expense, For the fiscal year ending July 31, 2023	88,051
Estimated annual amortization expense, For the fiscal year ending July 31, 2024	79,588
Estimated annual amortization expense, For the fiscal year ending July 31, 2025 and thereafter	494,337
Estimated annual amortization expense, Total	$ 970,811