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Nature of Business - Additional Information (Detail)
12 Months Ended
Jan. 31, 2015
Store
State
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Number of retail stores 67rh_NumberOfRetailStores
Number of outlet stores 17rh_NumberOfOutletStores
Number of states 29us-gaap_NumberOfStatesInWhichEntityOperates