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Net Income Per Share
 3 Months Ended
Mar. 31, 2022
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 for the period, excluding unvested RSUs and stock options. Diluted net income per share is based upon the weighted average shares of common stock outstanding for the period plus dilutive potential shares of common stock, including unvested RSUs and stock options using the treasury stock method.
The following table sets forth the computation of basic and diluted net income per share for the three months ended March 31, 2022 and 2021 (in thousands):
Three Months Ended March 31,
20222021
Net income$26,572 $29,514 
Shares used to compute basic net income per share36,303 36,336 
Dilutive potential common shares
Stock options233 224 
Unvested restricted stock awards668 689 
Shares used to compute diluted net income per share37,204 37,249 
Basic net income per share$0.73 $0.81 
Diluted net income per share$0.71 $0.79 
Dilutive shares included in the calculation1,409 1,436 
Anti-dilutive shares excluded from the calculation56 18