Calculation Of Net Income Per Share (Tables)

6 Months Ended

Jun. 30, 2016

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 June 30,		Six Months Ended June 30,
	2016	2015	2016	2015
	(In thousands)
Weighted-average shares of common stock outstanding	108,067	115,656	108,829	116,394
Weighted-average potential shares of common stock outstanding:
Conversion spread related to Convertible Debentures	21,872	16,973	21,472	16,392
Unvested RSUs, stock options, and ESPP	649	622	783	760
Shares used to compute diluted earnings per share	130,588	133,251	131,084	133,546