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Per Share Information (Tables)
9 Months Ended
Sep. 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 EndedNine Months Ended
September 30,September 30,
2020201920202019
Amounts attributable to common stock:
Net income attributable to common stock$162,913 $136,068 $275,545 $283,900 
Weighted average shares:
Weighted average shares outstanding for basic earnings per share attributable to common stock140,542 145,913 141,610 145,654 
Effect of dilutive unvested non-participating stock-based awards3,821 1,525 3,375 1,420 
Weighted average shares outstanding for diluted earnings per share attributable to common stock144,363 147,438 144,985 147,074