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Net Income Per Share
 9 Months Ended
Sep. 30, 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 and nine months ended September 30, 2022 and 2021 (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2022202120222021
Net income$23,040 $16,029 $69,057 $74,997 
Shares used to compute basic net income per share35,929 36,622 36,117 36,510 
Dilutive potential common shares
Stock options120 255 174 240 
Unvested restricted stock awards220 540 390 535 
Shares used to compute diluted net income per share36,269 37,417 36,681 37,285 
Basic net income per share$0.64 $0.44 $1.91 $2.05 
Diluted net income per share$0.64 $0.43 $1.88 $2.01 
Dilutive shares included in the calculation1,208 1,279 1,150 1,312 
Anti-dilutive shares excluded from the calculation549 4 400 8