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Fair Value (Tables)
3 Months Ended
Apr. 28, 2012
Fair Value [Abstract]  
Company's assets and liabilities measured at fair value
  Assets and Liabilities at Fair Value as of April 28, 2012
  (in thousands)
   Level 1  Level 2  Level 3  Total
ASSETS:           
 ARS - available-for-sale - student loan backed$ - $ - $ 22,289 $ 22,289
 ARS - available-for-sale - municipal authority bonds  -   -   15,613   15,613
 Derivative financial instruments  -   5,597   -   5,597
Total assets measured at fair value$ - $ 5,597 $ 37,902 $ 43,499
LIABILITIES:           
 Derivative financial instruments  -   2,632   -   2,632
Total liabilities measured at fair value$ - $ 2,632 $ - $ 2,632
             
             
Fair value assets measured on recurring basis unobservable input reconciliation
(in thousands) Available-for-sale ARS - Student Loans  Available-for-sale ARS - Muni Bonds  Total
Fair value, January 28, 2012 $ 84,650 $ 14,858 $ 99,508
Redemptions / Settlements  (62,431)   -   (62,431)
Gains and (losses), net:        
Reported in Net Income  70   755   825
Fair value, April 28, 2012 $ 22,289 $ 15,613 $ 37,902
Fair Value Inputs Assets Quantitative Information [Table Text Block]
          
Quantitative information about Level 3 fair value measurements (in thousands)
   Fair Value at April 28, 2012 Valuation Technique Unobservable Inputs Range (weighted average)
          
Student loan      Periodic coupon rate 0.27% - 4.31%
ARS $22,289 Discounted cash flow Market rate of return 0.24% - 1.85%
       Expected term 6.6 - 19.6
          
Muncipal authority      Periodic coupon rate 0.37% - 5.00%
ARS $15,613 Discounted cash flow Market rate of return 0.02% - 3.87%
       Expected term 22.0 - 27.5