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Share-Based Payments (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Weighted-Average Assumptions Used to Determine Fair Value of Stock Options | The fair value of the SARs granted in conjunction with the EHHI acquisition has been estimated using the Black-Scholes option-pricing model with the following weighted-average assumptions:
| For the Year Ended December 31,
| 2017 |  | 2016
Expected volatility | 28.7 | % |  | 25.9 | %
Risk-free interest rate | 1.9 | % |  | 1.9 | %
Expected life (years) | 2.1 |  |  | 5.3 |
Dividend yield | — | % |  | — | %
The fair values of the options granted during the years ended December 31, 2017, 2016, and 2015 have been estimated at the grant date using the Black-Scholes option-pricing model with the following weighted-average assumptions:
| For the Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Expected volatility | 30.5 | % |  | 37.2 | % |  | 39.5 | %
Risk-free interest rate | 2.1 | % |  | 1.6 | % |  | 1.9 | %
Expected life (years) | 7.7 |  |  | 7.5 |  |  | 7.7 |
Dividend yield | 2.2 | % |  | 2.1 | % |  | 2.1 | %
Schedule of Stock Option Activity | A summary of our stock option activity and related information is as follows:
| Shares (In Thousands) |  | Weighted- Average Exercise Price per Share |  | Weighted- Average Remaining Life (Years) |  | Aggregate Intrinsic Value (In Millions)
Outstanding, December 31, 2016 | 1,575 |  |  | $ | 21.45 |  |  |  |  |
Granted | 95 |  |  | 42.22 |  |  |  |  |
Exercised | (1,107 | ) |  | 18.58 |  |  |  |  |
Forfeitures | (3 | ) |  | 43.14 |  |  |  |  |
Expirations | (3 | ) |  | 23.19 |  |  |  |  |
Outstanding, December 31, 2017 | 557 |  |  | 30.53 |  |  | 6.0 |  | $ | 10.5 |
Exercisable, December 31, 2017 | 377 |  |  | 25.81 |  |  | 4.6 |  | 8.9 |
Schedule of Restricted Stock Activity | A summary of our issued restricted stock awards is as follows (share information in thousands):
| Shares |  | Weighted-Average Grant Date Fair Value
Nonvested shares at December 31, 2016 | 618 |  |  | $ | 35.06 |
Granted | 504 |  |  | 42.85 |
Vested | (427 | ) |  | 34.83 |
Forfeited | (22 | ) |  | 39.22 |
Nonvested shares at December 31, 2017 | 673 |  |  | 40.90 |

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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