Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data	Jul. 31, 2011	Jan. 31, 2011	Jul. 31, 2010
CURRENT ASSETS
Allowance for doubtful accounts receivable	$ 25,011	$ 32,174	$ 27,111
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	20,255,972	20,056,132	19,540,272
Treasury stock, shares	367,225	367,225	367,225