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COMMON STOCK (Detail) (USD $)
 12 Months Ended
Jan. 31, 2013
Jan. 31, 2012
Jan. 31, 2011
Treasury Stock, Shares, Acquired 278,369 1,518,877 514,657
Treasury Stock, Value, Acquired, Cost Method (in Dollars) $ 5,445,000 $ 25,662,000 $ 8,229,000
Stock Repurchase Program Number of Additional Shares Authorized to be Repurchased 417,021    
Stock Options [Member]
      
Treasury Stock, Shares, Acquired 32,935 213,288  
Treasury Stock, Value, Acquired, Cost Method (in Dollars) $ 1,071,000 $ 3,444,000