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Financial Instruments (Details) - Schedule of Notional Amounts and fair Values (USD $)
In Thousands, unless otherwise specified
Jul. 31, 2013
Jan. 31, 2013
Financial Instruments (Details) - Schedule of Notional Amounts and fair Values [Line Items]    
Interest rate swap $ 1,933 $ 2,789
Interest Rate Swap [Member]
   
Financial Instruments (Details) - Schedule of Notional Amounts and fair Values [Line Items]    
Interest rate swap 35,668  
Interest rate swap $ 1,933