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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 ShareBasic net income per share is computed by dividing net income by the weighted average number of common shares outstanding, while diluted net income per share is computed by dividing net income attributable to common stockholders by the sum of the weighted average number of common shares outstanding and the weighted average number of dilutive potential common shares. Dilutive potential common shares relate to our share-based compensation arrangements.
The calculation of basic and diluted net income per share is as follows.
Net income per share
Three Months Ended
September 30,		Nine Months Ended
September 30,
(In thousands, except per-share amounts)2023202220232022
Net income—basic and diluted$156,582 $198,280 $460,426 $580,604 
Average common shares outstanding—basic 158,461 162,506 158,992 171,116 
Dilutive effect of share-based compensation arrangements (1)
1,686 2,232 1,877 2,502 
Adjusted average common shares outstanding—diluted160,147 164,738 160,869 173,618 
Net income per share
Basic$0.99 $1.22 $2.90 $3.39 
Diluted$0.98 $1.20 $2.86 $3.34 
The following number of shares of our common stock equivalents issued under our share-based compensation arrangements are not included in the calculation of diluted net income per share because their effect would be anti-dilutive.
Three Months Ended
September 30,		Nine Months Ended
September 30,
(In thousands)2023202220232022
Shares of common stock equivalents— — 100 —