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Goodwill and Intangible Assets - Summary of Goodwill Activity (Details) (USD $)
3 Months Ended
Apr. 30, 2015
Goodwill - Roll forward  
Beginning Balance $ 11,242,000us-gaap_Goodwill
Business acquisition, goodwill 415,000us-gaap_GoodwillAcquiredDuringPeriod
Ending Balance $ 11,657,000us-gaap_Goodwill