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Net Income Per Share
 9 Months Ended
Sep. 30, 2023
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, 2023 and 2022 (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2023202220232022
Net income$28,419 $23,040 $111,275 $69,057 
Shares used to compute basic net income per share35,912 35,929 35,938 36,117 
Dilutive potential common shares
Stock options70 120 114 174 
Unvested restricted stock awards99 220 300 390 
Shares used to compute diluted net income per share36,081 36,269 36,352 36,681 
Basic net income per share$0.79 $0.64 $3.10 $1.91 
Diluted net income per share$0.79 $0.64 $3.06 $1.88 
Dilutive shares included in the calculation663 1,208 1,152 1,150 
Anti-dilutive shares excluded from the calculation1,342 549 857 400