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Net Income per Share
 12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Net Income per Share Net Income per Share
Basic net income per share is computed using the weighted average number of shares of common stock outstanding during the period. Diluted net income per share is computed using the weighted average number of shares of common stock, adjusted for any dilutive effect of potential common stock. Potential common stock, computed using the treasury stock method, includes RSUs, MSUs and our ESPP.

The following table sets forth the computation of basic and diluted net income per share attributable to common stock (in thousands, except per share amounts): 
 Year Ended December 31,
 202120202019
Numerator:
Net income $772,020 $1,775,888 $442,776 
Denominator:
Weighted average common shares outstanding, basic78,917 78,760 79,424 
Dilutive effect of potential common stock753 470 676 
Total shares, diluted79,670 79,230 80,100 
Net income per share, basic$9.78 $22.55 $5.57 
Net income per share, diluted$9.69 $22.41 $5.53 
Anti-dilutive potential common shares 1
1 280 79 

1    Represents RSUs and MSUs not included in the calculation of diluted net income per share as the effect would have been anti-dilutive.