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Share-Based Compensation | 3 Months Ended
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Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Share-Based Compensation | Share-Based Compensation During the three months ended March 31, 2019, we granted 326,900 non-qualified employee stock options, 42,700 restricted stock units, 58,340 performance shares, and 5,933 phantom stock units. 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. For the three months ended March 31, 2018, total share-based compensation expense was $4.9 million and the related tax benefits were $1.2 million. The estimated fair value of our 2019 non-qualified employee stock option awards and related underlying assumptions are shown in the table below.
| 2019
Weighted-average estimated fair value | $22.24
Quarterly dividend rate | $0.46
Expected term of stock options, in years | 4.2
Risk-free interest rate | 2.5%
Dividend yield | 2.6%
Expected stock price volatility | 28.9%
Present value of dividends | $7.29

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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