Calculation Of Net Income Per Share (Tables)

12 Months Ended

Dec. 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:

	Year Ended December 31,
	2021	2020	2019
	(In thousands)
Weighted-average shares of common stock outstanding	112,015	115,058	118,513
Weighted-average potential shares of common stock outstanding:
Unvested RSUs and ESPP	151	240	455
Shares used to compute diluted earnings per share	112,166	115,298	118,968