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Per Share Information
 9 Months Ended
Sep. 30, 2023
Earnings Per Share [Abstract]  
Per Share Information
7. PER SHARE INFORMATION:
The amounts used to compute basic and diluted earnings per share attributable to common stock consisted of the following (in thousands):
Three Months EndedNine Months Ended
September 30,September 30,
2023202220232022
Amounts attributable to common stock:
Net income attributable to common stock$272,836 $155,956 $533,781 $328,617 
Weighted average shares:
Weighted average shares outstanding for basic earnings per share attributable to common stock145,455 143,353 145,118 143,581 
Effect of dilutive unvested non-participating stock-based awards3,337 4,325 3,631 4,515 
Weighted average shares outstanding for diluted earnings per share attributable to common stock148,792 147,678 148,749 148,096