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Calculation Of Net Income Per Share | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Calculation Of Net Income Per Share Attributable To Verisign Stockholders | Calculation of Earnings per Share The following table presents the computation of weighted-average shares used in the calculation of basic and diluted earnings per share:
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
| (In thousands)
Weighted-average shares of common stock outstanding | 100,325 |  |  | 107,001 |  |  | 114,155 |
Weighted-average potential shares of common stock outstanding: |  |  |  |  |
Conversion spread related to Subordinated Convertible Debentures | 23,247 |  |  | 21,074 |  |  | 18,047 |
Unvested RSUs, and ESPP | 608 |  |  | 758 |  |  | 829 |
Shares used to compute diluted earnings per share | 124,180 |  |  | 128,833 |  |  | 133,031 |
The calculation of diluted weighted average shares outstanding, excludes potentially dilutive securities, the effect of which would have been anti-dilutive, as well as performance based RSUs granted by the Company for which the relevant performance criteria have not been achieved. The number of potential shares excluded from the calculation was not significant in any period presented.

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