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Calculation Of Net Income Per Share (Tables)
3 Months Ended
Mar. 31, 2021
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,
 20212020
 (In thousands)
Weighted-average shares of common stock outstanding113,131116,375
Weighted-average potential shares of common stock outstanding:
Unvested RSUs and ESPP165355
Shares used to compute diluted earnings per share113,296116,730