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Per Share Information (Tables)
3 Months Ended
Mar. 31, 2021
Earnings Per Share [Abstract]  
Basic and Diluted Earnings Per Share Attributable to Common Stock
The amounts used to compute basic and diluted earnings per share attributable to common stock consisted of the following (in thousands):
Three Months Ended
March 31,
20212020
Amounts attributable to common stock:
Net income attributable to common stock$89,761 $38,686 
Weighted average shares:
Weighted average shares outstanding for basic earnings per share attributable to common stock140,121 144,454 
Effect of dilutive unvested non-participating stock-based awards4,326 2,333 
Weighted average shares outstanding for diluted earnings per share attributable to common stock144,447 146,787