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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Fiscal Years (Details)
 12 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Number of Weeks 52tru_NumberOfWeeksInFiscalYear 52tru_NumberOfWeeksInFiscalYear 53tru_NumberOfWeeksInFiscalYear
Ended Jan. 31, 2015 Feb. 01, 2014 Feb. 02, 2013