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Goodwill and Intangible Assets - Schedule of Expected Amortization Expense of Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
Apr. 30, 2015
Jan. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]    
Remainder of 2016 $ 3,401us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear  
2017 1,952us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo  
2018 169us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree  
2019 23us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour  
2020 1us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive  
Net Carrying Value $ 5,546us-gaap_FiniteLivedIntangibleAssetsNet $ 6,343us-gaap_FiniteLivedIntangibleAssetsNet