Note 9. Stock Repurchase Program

The Company's Board of Directors (Board) previously approved a stock repurchase program pursuant to which the Company was authorized to purchase up to $500.0 million of its common stock. The Board has periodically replenished the stock repurchase program up to $500.0 million. The Company repurchases shares to offset dilution caused by ongoing stock issuances from existing plans for equity compensation awards, acquisitions, and when management believes it is a good use of cash. Repurchases are transacted in accordance with Rule 10b-18 of the Securities Exchange Act of 1934 (Exchange Act) and may be made through any means including, but not limited to, open market purchases, plans executed under Rule 10b5-1(c) of the Exchange Act and structured transactions. As of April 30, 2011, $80.3 million remained available for further repurchases under the program. On May 25, 2011, the Board replenished the stock repurchase program up to $500.0 million. The following table summarizes stock repurchase activities as well as the reissuance of treasury stock for employee stock compensation purposes:


	Three Months Ended April 30,				Six Months Ended April 30,
	2011		2010		2011		2010
	(in thousands, except per share price)
Shares repurchased		6,191		1,112		8,609		2,279
Average purchase price per share	$	27.46	$	22.48	$	27.29	$	22.05
Aggregate purchase price	$	169,988	$	25,000	$	234,985	$	50,257
Reissuance of treasury stock		3,430		4,377		6,616		5,142