Net Income Per Share (Tables)

9 Months Ended

Sep. 30, 2011

Net Income Per Share [Abstract]

Weighted Average Number Of Shares Outstanding

	Three Months Ended September 30,				Nine Months Ended September 30,
(Shares in thousands)	2011		2010		2011		2010
Basic		80,644		79,357		80,381		79,078
Assumed dilution under stock plans		984		909		1,041		919
Diluted		81,628		80,266		81,422		79,997