Calculation Of Net Income Per Share (Tables)

9 Months Ended

Sep. 30, 2014

Earnings Per Share [Abstract]

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

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

	Three Months Ended September 30,		Nine Months Ended September 30,
	2014	2013	2014	2013
	(In thousands)
Weighted-average shares of common stock outstanding	124,109	141,701	128,924	147,567
Weighted-average potential shares of common stock outstanding:
Conversion spread related to the Subordinated Convertible Debentures	13,228	10,480	12,935	9,258
Unvested RSUs	730	669	670	664
Stock options	25	94	30	98
Employee stock purchase plan	20	7	25	19
Shares used to compute diluted net income per share	138,112	152,951	142,584	157,606