SEGMENT INFORMATION (Narrative) (Details)	12 Months Ended
Jan. 31, 2015 segment state store
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments (segment)	1us-gaap_NumberOfReportableSegments
Number of stores (store)	460us-gaap_NumberOfStores
Number of states in which stores are located (state)	44

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration