Calculation Of Net Income Per Share (Tables)

3 Months Ended

Mar. 31, 2017

Earnings Per Share [Abstract]

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 earnings per share:

	Three Months Ended March 31,
	2017	2016
	(In thousands)
Weighted-average shares of common stock outstanding	102,467	109,592
Weighted-average potential shares of common stock outstanding:
Conversion spread related to Convertible Debentures	21,327	21,073
Unvested RSUs and ESPP	670	916
Shares used to compute diluted earnings per share	124,464	131,581