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Goodwill and Other Intangible Assets - Future Estimated Amortization Expense Related to Amortizable Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Jul. 31, 2014
Jan. 31, 2014
Finite Lived Intangible Assets Future Amortization Expense [Abstract]    
2015 $ 926  
2016 1,852  
2017 1,809  
2018 1,787  
2019 1,438  
2020 and thereafter 4,929  
Net Carrying Amount $ 12,741 $ 3,201