Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets - Schedule of Finite-Life Intangible Assets, Future Amortization Expense (Detail)

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Goodwill and Intangible Assets - Schedule of Finite-Life Intangible Assets, Future Amortization Expense (Detail) (USD $)
In Thousands, unless otherwise specified
Apr. 30, 2015
Jan. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]    
2016 (for the remaining nine months) $ 3,423us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear  
2017 3,244us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo  
2018 2,197us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree  
2019 1,648us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour  
2020 1,199us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive  
2021 and thereafter 1,151us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive  
Finite-life intangible assets, Net $ 12,862us-gaap_FiniteLivedIntangibleAssetsNet $ 7,314us-gaap_FiniteLivedIntangibleAssetsNet