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Goodwill and Intangible Assets - Estimated Future Amortization of Intangible Assets (Detail)
$ in Thousands
Jan. 31, 2016
USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
Remainder of fiscal 2016 $ 91,536
2017 90,821
2018 65,607
2019 42,487
2020 28,506
2021 and thereafter 18,423
Total $ 337,380