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Share-Based Compensation Plans (Tables) | 9 Months Ended
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Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of restricted stock activity | The following is a summary of restricted stock activity for the nine months ended September 30, 2015:
(shares in thousands) | Shares |  | Weighted Average Grant Date Fair Value /Share
Outstanding at January 1, 2015 | 1,171 |  |  | $ | 31.80 |
Granted | 411 |  |  | 35.84 |
Vested | (345 | ) |  | 27.82 |
Forfeited | (105 | ) |  | 32.50 |
Outstanding at September 30, 2015 | 1,132 |  |  | $ | 34.43 |
Summary of performance based share grants | The following is a summary of performance-based share grants for the nine months ended September 30, 2015:
(shares in thousands) | Shares |  | Weighted Average Grant Date Fair Value /Share
Outstanding at January 1, 2015 | 124 |  |  | $ | 33.95 |
Granted | 103 |  |  | 35.91 |
Vested | — |  |  | — |
Forfeited | (48 | ) |  | 33.11 |
Outstanding at September 30, 2015 | 179 |  |  | $ | 35.30 |
Summary of the changes in outstanding stock options | The following is a summary of the changes in outstanding stock options for the nine months ended September 30, 2015:
(shares in thousands) | Shares |  | Weighted Average Exercise Price / Share |  | Weighted Average Remaining Contractual Term (Years)
Outstanding at January 1, 2015 | 2,989 |  |  | $ | 28.60 |  |  | 6.5
Granted | 708 |  |  | 35.88 |  |  | 10.0
Exercised | (519 | ) |  | 26.85 |  |  | 5.6
Forfeited and expired | (178 | ) |  | 34.04 |  |  | 8.5
Outstanding at September 30, 2015 | 3,000 |  |  | $ | 30.30 |  |  | 6.7
Options exercisable at September 30, 2015 | 1,939 |  |  | $ | 27.44 |  |  | 5.4
Vested and expected to vest as of September 30, 2015 | 2,877 |  |  | $ | 30.09 |  |  | 6.6
Weighted-average assumptions for 2015 grants | The following are weighted-average assumptions for 2015 grants:
Dividend yield | 1.57 |  | %
Volatility | 27.77 |  | %
Risk-free interest rate | 1.64 |  | %
Expected term (in years) | 5.58 |  |
Weighted-average fair value / share | $ | 8.49 |  |

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- Definition Tabular disclosure of the changes in outstanding nonvested performance-based units. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + 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)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the change in stock options. + References No definition available. + Details
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