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Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 2021
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Earnings Per Share The following table sets forth the components used in the computation of basic and diluted earnings per share (in thousands, except share and per share amounts):
 Three Months Ended September 30,Nine Months Ended September 30,
 2021202020212020
Numerator:    
Net income$133,156 $78,682 $321,827 $167,093 
Denominator:    
Basic weighted-average shares outstanding112,781,663 128,941,901 116,296,265 131,190,301 
Effect of dilutive shares:   
Stock options and unvested restricted stock units1,000,588 573,213 892,628 482,351 
Diluted weighted-average shares outstanding113,782,251 129,515,114 117,188,893 131,672,652 
Earnings per share    
Basic$1.18 $0.61 $2.77 $1.27 
Diluted$1.17 $0.61 $2.75 $1.27 
Antidilutive stock options and unvested restricted stock units not included in diluted earnings per share1,795,929 1,666,469 1,999,768 2,550,475