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Share-Based Compensation
3 Months Ended
Mar. 31, 2020
Share-based Payment Arrangement [Abstract]  
Share-Based Compensation Share-Based Compensation

During the three months ended March 31, 2020, we granted 288,000 non-qualified employee stock options, 34,950 restricted stock units, 54,270 performance shares, and 5,753 phantom stock units. For the three months ended March 31, 2020, total share-based compensation expense was $2.2 million and the related tax benefits were $0.5 million. For the three months ended March 31, 2019, total share-based compensation expense was $5.1 million and the related tax benefits were $1.3 million.

The estimated fair value of our 2020 non-qualified employee stock option awards and related underlying assumptions are shown in the table below.
 
2020
Weighted-average estimated fair value
$22.50
Quarterly dividend rate
$0.48
Expected term of stock options, in years
4.2
Risk-free interest rate
1.3%
Dividend yield
2.5%
Expected stock price volatility
28.5%
Present value of dividends
$7.89