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Shareholders' Equity
 12 Months Ended
Jan. 31, 2012
Shareholders' Equity [Abstract]  
Shareholders' Equity

10. Shareholders' Equity

On February 28, 2006, the Company's Board of Directors approved a stock repurchase program which authorized the Company to repurchase up to 8,000,000 common shares. On November 16, 2010 and August 25, 2011, the Company's Board of Directors approved two separate stock repurchase authorizations of 10,000,000 additional common shares. These additional authorizations supplemented the Company's 2006 stock repurchase program.

During the fiscal years ended January 31, 2012 and 2011 the Company repurchased and subsequently retired 20,491,530 and 6,288,447 common shares at a total cost of $538,311 and $200,732, respectively. There were no share repurchases during the fiscal year ended January 31, 2010. The average cost per share of the repurchases for the fiscal years ended January 31, 2012 and 2011 was $26.27 and $31.92, respectively, including commissions. As of January 31, 2012, there were no common shares available for repurchase under the program.

In addition to shares repurchased under the stock repurchase program, during the fiscal years ended January 31, 2012 and 2011, the Company settled and subsequently retired 282,813 and 112,770 common shares at a total cost of $7,167 and $3,986, respectively, from employees to meet minimum statutory tax withholding requirements.

As a result of the share repurchase activity noted above, the Company reduced the balance of additional paid-in-capital to zero. Subsequent share repurchase activity was recorded as a reduction of retained earnings. During the fiscal year ended January 31, 2012 the Company reduced retained earnings by $501,676 related to these share repurchases.