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Financial Instruments (Tables)
 3 Months Ended
Apr. 30, 2013
Schedule of Notional Amounts and Fair Values of Derivatives Not Designated As Cash Flow Hedges [Table Text Block] The notional amount and fair value of the derivative, which is not designated as a cash flow hedge at April 30, 2013, are summarized in the table below (amounts in thousands):
    Notional
Amount 		    Fair Value
 Liability 		 
                 
Interest rate swap   $ 36,759     $ 2,345