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Short-Term Investment Reconciliation - (Tables)
12 Months Ended
Jan. 31, 2015
InvestmentsDebtAndEquitySecuritiesAbstract  
Schedule Of Available For Sale Securities Reconciliation to Fair Value
  January 31, 2015  February 1, 2014
 Debt securities     Debt securities    
 issued by various        issued by various       
 states of the United       states of the United      
 States and political Corporate    States and political Corporate   
 subdivisions of  debt    subdivisions of  debt   
 the states securities Total the states securities Total
Cost basis  147,227   13,996   161,223   157,358   2,795   160,153
Unrealized gains  906   56   962   971   4   975
Unrealized (loss)  -   -   -   -   -   -
Estimated fair value$ 148,133 $ 14,052 $ 162,185 $ 158,329 $ 2,799 $ 161,128