Shareholders' Equity	3 Months Ended
Shareholders' Equity	Apr. 30, 2011
Shareholders' Equity
Shareholders' Equity	8. Shareholders' Equity On February 28, 2006, the Company's Board of Directors approved a stock repurchase program. The program authorized the Company to repurchase of up to 8,000,000 common shares. On November 16, 2010, the Company's Board of Directors authorized the repurchase of up to 10,000,000 additional common shares. This authorization supplements the Company's 2006 stock repurchase program. The Company repurchased and subsequently retired 4,824,869 common shares at a total cost of $148,674 during the three months ended April 30, 2011. The average cost per share of the repurchases was $30.81, including commissions. The Company did not repurchase any shares during the three months ended April 30, 2010. The repurchases completed the Company's 2006 share repurchase program and reduced the 2010 repurchase program by 4,333,316 shares. As of April 30, 2011, a total of 5,666,684 shares remain available under the 2010 repurchase program. As a result of the share repurchase noted above, the Company reduced the balance of additional paid-in-capital to zero which required subsequent share repurchases to be recorded as a reduction of retained earnings. During the three months ended April 30, 2011, the Company reduced retained earnings by $115,778 related to these share repurchases.

Disclosures related to accounts comprising shareholders' equity, including other comprehensive income. Includes: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables; effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure.

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