Common Stock Repurchases	3 Months Ended
Oct. 31, 2012
Common Stock Repurchases	13. Common stock repurchases: On December 9, 2010, we announced that our Board of Directors authorized the repurchase of up to $30,000 of our common stock. The repurchase program was funded using our available cash. During the three months ended October 31, 2011, we repurchased and retired 231,700 shares of Common Stock under this repurchase program for $11,808 at an average purchase price of $50.96 per share. The 2010 repurchase program was completed in the second quarter of fiscal year 2012. The cumulative shares that were repurchased and retired under the program were 586,679 shares of common stock for $30,000 at an average price of $51.14 per share. On December 8, 2011, we announced that our Board of Directors had authorized the repurchase of up to an additional $30,000 of our common stock. The repurchase program will be funded using our available cash. During the three months ended October 31, 2012, we repurchased and retired 56,324 shares of common stock under this repurchase program for $3,937 at an average purchase price of $69.86 per share. As of October 31, 2012, we repurchased and retired 193,915 shares of Common Stock under this repurchase program for $12,381 at an average purchase price of $63.85 per share.

13. Common stock repurchases:

On December 9, 2010, we announced that our Board of Directors authorized the repurchase of up to $30,000 of our common stock. The repurchase program was funded using our available cash. During the three months ended October 31, 2011, we repurchased and retired 231,700 shares of Common Stock under this repurchase program for $11,808 at an average purchase price of $50.96 per share. The 2010 repurchase program was completed in the second quarter of fiscal year 2012. The cumulative shares that were repurchased and retired under the program were 586,679 shares of common stock for $30,000 at an average price of $51.14 per share.

On December 8, 2011, we announced that our Board of Directors had authorized the repurchase of up to an additional $30,000 of our common stock. The repurchase program will be funded using our available cash. During the three months ended October 31, 2012, we repurchased and retired 56,324 shares of common stock under this repurchase program for $3,937 at an average purchase price of $69.86 per share. As of October 31, 2012, we repurchased and retired 193,915 shares of Common Stock under this repurchase program for $12,381 at an average purchase price of $63.85 per share.