Calculation Of Net Income Per Share (Tables)

6 Months Ended

Jun. 30, 2012

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

The following table presents the weighted-average potential shares of common stock that were excluded from the above calculation because their effect was anti-dilutive, and the respective weighted-average exercise prices of the weighted-average stock options outstanding:



	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
	(In thousands, except per share data)
Weighted-average stock options outstanding	58		2,443		59		270
Weighted-average exercise price	$	40.81	$	27.14	$	40.81	$	38.43
Weighted-average RSUs outstanding	4		2,856		3		17
Employee stock purchase plan	—		653		60		255

Schedule of Weighted Average Number of Shares [Table Text Block]

The following table presents the computation of weighted-average shares used in the calculation of basic and diluted net income per share:



	Three Months Ended June 30,		Six Months Ended June 30,
	2012	2011	2012	2011
	(In thousands)
Weighted-average number of common shares outstanding	157,599	167,471	158,471	169,751
Weighted-average potential shares of common stock outstanding:
Stock options	189	—	195	436
Unvested RSUs	659	—	713	802
Conversion spread related to Convertible Debentures	5,636	—	4,089	833
Employee stock purchase plan	95	—	62	28
Shares used to compute diluted net income per share	164,178	167,471	163,530	171,850