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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Oct. 31, 2011
Jan. 31, 2011
Oct. 31, 2010
CURRENT ASSETS      
Allowance for doubtful accounts receivable $ 36,129 $ 32,174 $ 39,942
STOCKHOLDERS' EQUITY      
Preferred stock, shares authorized 1,000,000 1,000,000 1,000,000
Preferred stock, shares issued         
Preferred stock, shares outstanding         
Common stock, par value $ 0.01 $ 0.01 $ 0.01
Common stock, shares authorized 80,000,000 80,000,000 80,000,000
Common stock, shares issued 20,259,922 20,056,132 19,666,072
Treasury stock, shares 492,225 367,225 367,225