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Earnings per share (Tables)
 9 Months Ended
Sep. 30, 2024
Earnings Per Share [Abstract]  
Schedule of reconciliation of numerators and denominators of basic and diluted computations A reconciliation of the numerators and the denominators of the basic and diluted earnings per share computations is as follows (in thousands, except per share amounts):
Three Months Ended September 30,Nine Months Ended September 30,
 2024202320242023
Numerator
Net income$137,011 $81,837 $307,079 $196,206 
Denominator
Weighted average common shares outstanding for basic earnings per share126,850 131,965 126,969 132,896 
Dilutive potential common stock outstanding
Stock options2,174 1,830 1,844 1,882 
RSUs, PSUs and ESPP817 288 615 378 
Convertible Notes293 — 98 77 
Weighted average common shares outstanding for diluted earnings per share130,134 134,083 129,526 135,233 
Earnings per share
Basic$1.08 $0.62 $2.42 $1.48 
Diluted$1.05 $0.61 $2.37 $1.45 
Antidilutive securities excluded from calculation of diluted earnings per common share
Shares which have been excluded from the calculation of diluted earnings per common share because their effect was anti-dilutive include the following (shares in millions):
Three Months Ended September 30,Nine Months Ended September 30,
 2024202320242023
Anti-dilutive securities (1)
24.0 27.4 26.1 27.6 
(1) The anti-dilutive securities include outstanding stock options, unvested RSUs, unvested PSUs, common shares expected to be issued under our ESPP and Convertible Notes.