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Per Share Information (Tables)
6 Months Ended
Jun. 30, 2020
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
 
Six Months Ended
 
 
June 30,
 
June 30,
 
 
2020
 
2019
 
2020
 
2019
Amounts attributable to common stock:
 
 
 
 
 
 
 
 
Net income attributable to common stock
 
$
73,946

 
$
27,344

 
$
112,632

 
$
147,832

 
 
 
 
 
 
 
 
 
Weighted average shares:
 
 
 
 
 
 
 
 
Weighted average shares outstanding for basic earnings per share attributable to common stock
 
139,856

 
145,935

 
142,154

 
145,525

Effect of dilutive unvested non-participating stock-based awards
 
3,665

 
1,306

 
3,059

 
1,340

Weighted average shares outstanding for diluted earnings per share attributable to common stock
 
143,521

 
147,241

 
145,213

 
146,865